JP2000013278A - Radio device, radio portable equipment provided with it, radio base station and radio communication system including them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dual mode radio device that complies with the frequency division duplex FDD system and the time division duplex TDD system where simultaneous transmission reception is conducted in the FDD mode. SOLUTION: In the FDD mode, a high frequency SW 102 is thrown to the position of an antenna multicoupler 100 and a high frequency SW 106 is thrown to the position of a low noise amplifier 103 under the control and the radio device conducts simultaneous transmission reception. In the case of the transmission in the TDD mode, the transmission is conducted similarly to the case with the FDD mode. In the case of the reception in the TDD mode, the high frequency SW 102 is thrown to the position of an reception filter 105 and the high frequency SW 106 is thrown to the position of a low noise amplifier 104 under the control. In the TDD mode, the high frequency SW 102 is controlled so that the transmission and the reception are repeated for a prescribed time interval in the transmission and reception operation above.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to mobile phones and PHs.
Regarding wireless devices provided in wireless portable devices and wireless base stations used in wireless communication systems such as S, in particular, to realize high-performance dual-mode wireless devices compatible with simultaneous transmission / reception FDD system and TDD system with a simple configuration The configuration is as follows.

[0002]

2. Description of the Related Art Conventionally, in a radio communication system such as a cellular phone or a PHS, as a duplex system, an FDD (frequency division duplex) system in which a transmission frequency and a reception frequency are different, and transmission and reception in the same frequency with time. TDD (Time Division Duplex) method is used. Therefore, when the duplex system is different in a plurality of wireless communication systems, a wireless device that supports both the FDD system and the TDD system is required to realize a device that can be shared by both systems.

As a wireless device compatible with the time-division multiplexing FDD system (transmission and reception are not performed simultaneously) and the TDD system, for example, an example shown in Japanese Patent Application Laid-Open No. 8-316873 has been proposed. In systems such as the CDMA system, simultaneous transmission and reception are often required in the FDD system. Furthermore, FD
Since the transmission and reception frequencies are different in the D system and the transmission and reception frequencies are the same in the TDD system, a multiband function corresponding to a plurality of frequency bands is required for either or both transmission and reception. As an example having a multi-band function, for example, an example shown in Japanese Patent Application Laid-Open No. 9-18397 has been proposed.

Conventionally, a local oscillator has an N frequency divider for dividing the output of the local oscillator by N and an M frequency divider for dividing the output of the local oscillator by M, and two different frequencies are generated from one local oscillator. Kaihei 9-29
A frequency synthesizer circuit used in a wireless device, such as that shown in 4089, is known. According to this circuit, a plurality of frequency signals can be generated by the minimum local oscillator.

[0005]

SUMMARY OF THE INVENTION In the above-mentioned conventional radio equipment supporting the time division multiplexing FDD system and the TDD system, the FD
In the case of the D system, there was a problem that simultaneous transmission and reception could not be performed. That is, in order to cope with simultaneous transmission and reception, a multi-band compatible antenna shared circuit capable of simultaneous transmission and reception and a circuit sharing a local oscillation unit are required.

In the case of the simultaneous transmission / reception FDD system, the radio circuit performs a continuous transmission / reception operation. On the other hand, in the case of the TDD system, the radio circuit performs an operation of intermittently repeating transmission / reception with a period of about several mSec.

For this reason, various control signals require an optimum transient response characteristic for both modes. Also, the local oscillation section is required to have optimal performance for both modes. Further, in a low-noise amplifier, a power amplifier circuit, and a mixer circuit, optimal performance is required for both modes.

In the above-mentioned frequency synthesizer circuit,
Since there is a frequency divider externally in addition to the frequency divider in the loop of the PLL synthesizer, there has been a problem that the circuit scale is increased and the power consumption is increased.

An object of the present invention is to solve the problems of the conventional wireless device and to realize a high-performance dual-mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system with a simple configuration. I do.

It is another object of the present invention to provide a radio apparatus for generating a plurality of frequency signals while minimizing the number of frequency dividers used in the radio apparatus and realizing a reduction in circuit size and power consumption. Aim.

[0011]

Therefore, in the present invention, the FD
The operation of the transmission / reception circuit is switched so that simultaneous transmission / reception is performed in the D mode.

[0012] Further, a high-frequency switch is provided between the antenna duplexer and the antenna.

The first output of the high-frequency SW is connected to an antenna duplexer, and the second output is connected to a TDD mode receiving circuit.

[0014] Also, a configuration is made such that an FDD mode receiving circuit is connected to the receiving side output of the antenna duplexer, a transmitting circuit is connected to the transmitting side input, and a TDD mode receiving filter is connected to the second output of the high frequency SW. I do.

[0015] Also, a low-noise amplifier for FDD mode is connected to the output of the antenna duplexer on the receiving side, and a low-noise amplifier for TDD mode is connected after the TDD mode receiving filter, and the outputs of both low-noise amplifiers are selected. And connected to the receiving circuit.

Further, a high-frequency switch is provided between the transmission-side input of the duplexer and the transmission circuit.

The first output of the high-frequency switch is connected to a transmission circuit, and the second output is connected to a TDD mode reception circuit.

Further, a low-noise amplifier for FDD mode is connected to the output of the receiving side of the antenna duplexer, and the second
A low noise amplifier for TDD mode is connected to the output, and the outputs of both low noise amplifiers are selected and connected to the receiving circuit.

Further, the power supply of the low noise amplifier not used in the current mode is cut off in conjunction with the switching between the two modes.

The low-noise amplifier for FDD mode is GaAs-
It consists of a low-noise amplifier circuit using FETs, and a low-noise amplifier for TDD mode consists of a low-noise amplifier circuit using bipolar transistors.

Further, the low noise amplifier for the TDD mode has an input matching circuit for matching the noise figure minimum impedance of the amplifying element.

Further, the output of the receiving side of the antenna duplexer and the output of the receiving filter having the pass band frequency of the TDD mode are selected and input to the low noise amplifier shared by both the FDD and the TDD mode. I do.

Also, the reception side output of the antenna duplexer and the second output of the high frequency SW are selected and input to the low noise amplifier shared in both the FDD and TDD modes.

Further, a first receiving circuit for FDD mode is connected to the output of the receiving side of the antenna duplexer, and a second high-frequency signal is output to the output of a receiving filter having a pass band frequency of TDD mode.
A first input of the SW is connected, and a receiving filter having a pass band frequency for the FDD mode and a second antenna are connected to the second input of the second high-frequency SW.

The second output of the first high-frequency SW is connected to the TDD mode band-side input of the second antenna duplexer.
And the second antenna is connected to the FDD mode band side input of the antenna duplexer.

[0026] Further, a second antenna, a reception filter having a pass band frequency in the FDD mode, and a second high-frequency SW for connecting and disconnecting the reception filter and a second output of the high-frequency SW are provided. .

Also, the bias condition of the power amplifier of the transmitting section is switched in conjunction with the switching between the two modes.

Further, the first output of the high-frequency SW is connected to the TDD mode transmission circuit, and the second output of the high-frequency SW is connected to the antenna duplexer.

Further, a receiving circuit is connected to the receiving side output of the antenna sharing device, an FDD mode transmitting circuit is connected to the transmitting side input of the antenna sharing device, and a TDD mode transmitting filter is connected to the second output of the high frequency switch. The configuration is as follows.

In addition, FDD is applied to the input of the transmitting side of the antenna duplexer.
The power amplifier for the mode is connected, the power amplifier for the TDD mode is connected after the transmission filter having the pass band frequency of the TDD mode, and the input of both power amplifiers is selected and connected to the transmission circuit.

Further, a high-frequency switch is provided between the output of the receiving side of the antenna duplexer and the receiving circuit.

The first output of the high-frequency SW is connected to a receiving circuit, and the second output is connected to a TDD mode transmitting circuit.

Also, FDD is applied to the input of the transmitting side of the antenna duplexer.
Mode power amplifier, and connect TD to the second output of the high-frequency SW.
The power amplifier for D mode is connected, and the input of both power amplifiers is selected and connected to the transmission circuit.

Further, in conjunction with the switching between the two modes, the power supply of the power amplifier not used in the current mode is turned off.

The power amplifier for the FDD mode is GaAs-FE
A power amplifier circuit using T is used, and a power amplifier for TDD mode is configured using a power amplifier circuit using bipolar transistors.

In the above-mentioned power amplifier for the FDD mode, the saturation point of the amplifier circuit is set to be high so that the linear operation is performed when the maximum power is transmitted.

Further, the transmission side input of the antenna duplexer and the input of the transmission filter having the pass band frequency of the TDD mode are selected and connected to the power amplifier shared in both modes.

Further, the transmission-side input of the antenna duplexer and the second output of the high-frequency SW are selected and connected to a power amplifier shared by both modes.

Further, a reception filter is connected to the second antenna, and a second reception circuit shared by both modes is connected to the reception filter.

Further, the bias condition of the low-noise amplifier of the receiving section is switched in conjunction with the switching between the two modes.

Also, an up-converter, a down-converter, a first local oscillator, a two divider, a transmission intermediate frequency circuit for an FDD mode, a transmission intermediate frequency circuit for a TDD mode, Switching means for selecting an output of the frequency circuit and inputting the output to the up-converter is provided, and the first local oscillation unit is configured to have the same frequency in both modes.

Further, a first quadrature modulator and an FDD mode IF filter are provided as the transmission intermediate frequency circuit for the FDD mode, and a second quadrature modulator and a TDD mode IF filter are used as the transmission intermediate frequency circuits for the TDD mode. It comprises so that it may be provided.

Further, the output of the second local oscillator is distributed to the second quadrature modulator and the receiving intermediate frequency circuit, and the output of the third local oscillator is input to the first quadrature modulator. .

Further, a single quadrature modulator is shared in both modes, and the FDD mode IF filter and the TDD mode IF filter are switched and used.

Also, a high frequency SW is connected to the local oscillation input of the quadrature modulator, and the output of the second local oscillation unit or the output of the third local oscillation unit is selected and input to the quadrature modulator. Constitute.

The output of the first frequency divider is input to the first quadrature modulator, and the output of the second frequency divider is input to the second quadrature modulator.

Further, the output of the first multiplier is input to the first quadrature modulator, and the output of the second multiplier is input to the second quadrature modulator.

In the TDD mode, the transmission intermediate frequency circuit operates as a quadrature modulator, and in the FDD mode, the transmission intermediate frequency circuit operates as a frequency converter. Second
Are configured so that the local oscillators have the same frequency.

Also, an up-converter, a down-converter, a first local oscillator, a two divider, a reception intermediate frequency circuit for an FDD mode, a reception intermediate frequency circuit for a TDD mode, Switching means for selecting one of the two receiving intermediate frequency circuits and inputting the output is provided, and the frequency of the first local oscillation unit is made the same in both modes.

Further, a first quadrature demodulator and an FDD mode IF filter are provided as the reception intermediate frequency circuit for the FDD mode, and a second quadrature demodulator and a TDD mode IF filter are used as the reception intermediate frequency circuits for the TDD mode. It comprises so that it may be provided.

Also, the output of the second local oscillator is distributed to the second quadrature demodulator and the transmission intermediate frequency circuit, and the output of the third local oscillator is input to the first quadrature demodulator. .

Further, a single quadrature demodulator is shared in both modes, and the FDD mode IF filter and the TDD mode IF filter are switched and used.

Also, a high-frequency SW is connected to the local oscillation input of the above-mentioned quadrature demodulator, and the output of the second local oscillation section or the output of the third local oscillation section is selected and input to the quadrature demodulator. Constitute.

The output of the first frequency divider is input to the first quadrature demodulator, and the output of the second frequency divider is input to the second quadrature demodulator.

Further, the output of the first multiplier is input to the first quadrature demodulator, and the output of the second multiplier is input to the second quadrature demodulator.

In the TDD mode, the reception intermediate frequency circuit operates as a quadrature demodulator, and in the FDD mode, the reception intermediate frequency circuit operates as a frequency conversion unit. Second
Are configured so that the local oscillators have the same frequency.

A local oscillation filter is inserted between the splitter and the up-converter and the down-converter. The pass band of the filter is set to the local oscillation frequency, and the stop band is set to the transmission / reception frequency in the FDD and TDD modes. It is configured to set to the intermediate frequency.

Also, the output section of the first frequency divider and the second frequency divider has a 90-degree phase shift function, and the first frequency divider and the second frequency divider transmit local oscillation signals having phases different from each other by 90 degrees. It is configured to output to a quadrature modulator or quadrature demodulator.

Further, the bias condition of the up-converter or the down-converter is switched in conjunction with the switching between the two modes.

Further, the impedance of the matching circuit of the up-converter or the down-converter is switched in conjunction with the switching between the two modes.

Further, the level of the first local oscillation signal input to the up-converter or the down-converter is switched in conjunction with the switching between the two modes.

In a radio apparatus using a plurality of local oscillation signals of different frequencies, both the VCO output of the PLL synthesizer and the frequency divider output in the loop of the PLL synthesizer are used as the local oscillation signal.

Further, the VCO output of the PLL synthesizer section is input to an external divider, and both the output of the outer divider and the output of the divider in the loop of the PLL synthesizer are used as local oscillation signals. .

Further, the loop of the PLL synthesizer is provided with at least two stages of frequency dividers, and means for taking out the output of the frequency divider preceding the two stage frequency divider, and using the output as a local oscillation signal. To be configured.

Further, a plurality of frequency dividers and means for extracting a plurality of outputs having different frequency division numbers are provided in the loop of the PLL synthesizer, and the outputs are used as local oscillation signals.

Further, there is provided means for mixing a plurality of outputs having different frequency division numbers, and the output of the mixing means is used as a local oscillation signal.

Further, the plurality of local oscillation signals are used for the above-described transmission operation or reception operation.

In conjunction with the switching between the two modes, the AG
It is configured to switch the time response characteristics of the C circuit.

Also, the rising and falling characteristics of the transmission / reception circuit are switched in conjunction with the switching between the two modes.

Further, the time response characteristic of the transmission power detection circuit of the transmission circuit is switched in conjunction with the switching between the two modes.

The loop gain of the PLL synthesizer of the local oscillator is switched in conjunction with the switching between the two modes.

Also, in conjunction with the switching between the two modes, the PL
The comparison frequency of the L synthesizer is configured to be switched.

Further, in conjunction with the switching between the two modes, the PL
The loop filter bandwidth of the L synthesizer is configured to be switched.

Further, a wireless portable device is configured to include the above-described wireless device.

Further, a radio base station is constructed so as to include the above-mentioned radio apparatus.

Further, a wireless communication system is configured to include a wireless portable device equipped with the above wireless device and a wireless base station.

[0077]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention relates to a dual mode radio apparatus compatible with the FDD system and the TDD system, which switches the operation of the transmission / reception circuit so as to perform simultaneous transmission / reception in the FDD mode. This is a wireless device that is characterized by realizing a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system.

According to a second aspect of the present invention, there is provided a dual mode radio apparatus compatible with the TDD scheme and the FDD scheme which performs simultaneous transmission / reception operations. Equipped with SW, FD
A radio apparatus characterized by performing transmission / reception operations using the antenna duplexer in the D mode, and performing transmission / reception switching using the high-frequency SW in the TDD mode,
A dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

According to a third aspect of the present invention, there is provided a receiving circuit for connecting a first output of the high-frequency SW to the antenna duplexer and providing a second output of the high-frequency SW for TDD mode. 3. The wireless device according to claim 2, wherein a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 4 of the present invention is characterized in that an FDD mode receiving circuit is connected to a receiving output of the antenna duplexer, and a transmitting circuit is connected to a transmitting input of the antenna duplexer. 4. The radio apparatus according to claim 2, wherein a reception filter having a pass band frequency in a TDD mode is connected to a second output of the high-frequency switch.
A dual mode wireless device compatible with the FDD system and the TDD system can be realized.

According to a fifth aspect of the present invention, a low-noise amplifier for an FDD mode is connected to a receiving-side output of the antenna duplexer, and is provided downstream of the receiving filter having a pass band frequency of a TDD mode. A low-noise amplifier for TDD mode is connected, an output of the low-noise amplifier for FDD mode and an output of the low-noise amplifier for TDD mode are selected and connected to a receiving circuit. 4. The dual mode wireless device according to item 4, wherein the dual mode wireless device supports the simultaneous transmission / reception FDD system and the TDD system.

According to a sixth aspect of the present invention, there is provided a dual mode radio apparatus compatible with the TDD system and the FDD system for performing simultaneous transmission / reception operations, comprising: an antenna duplexer; a transmission-side input of the antenna duplexer; High frequency between
SW in the FDD mode to perform transmission / reception operations using the antenna duplexer.
The wireless device is characterized by performing transmission / reception switching by using a wireless communication device, and can realize a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system.

The invention according to claim 7 of the present invention provides
The wireless device according to claim 6, wherein a first output of the high-frequency switch is connected to a transmission circuit, and a second output of the high-frequency switch is connected to a reception circuit provided for a TDD mode. Thus, a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

According to an eighth aspect of the present invention, a low-noise amplifier for FDD mode is connected to a reception-side output of the antenna duplexer, and a low-noise amplifier for TDD mode is connected to a second output of the high-frequency SW. The wireless device according to claim 6 or 7, wherein an output of the low-noise amplifier for the FDD mode and an output of the low-noise amplifier for the TDD mode are selected and connected to a receiving circuit. , Simultaneous transmission / reception FDD system and T
A dual mode wireless device compatible with the DD system can be realized.

According to a ninth aspect of the present invention, the power supply of a low-noise amplifier not used in the current mode is cut off in conjunction with switching between the FDD mode and the TDD mode. The wireless device according to claim 5 or 8, wherein a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 10 of the present invention is characterized in that
The low-noise amplifier for FDD mode is constituted by a low-noise amplifier circuit using GaAs-FET, and the low-noise amplifier for TDD mode is constituted by a low-noise amplifier circuit using bipolar transistors. The wireless device according to claim 5 or 8, wherein a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 11 of the present invention is characterized in that
9. The radio apparatus according to claim 5, further comprising an input matching circuit for matching a noise figure minimum impedance of the amplifying element in the low noise amplifier for the TDD mode. , A dual-mode wireless device can be realized.

According to a twelfth aspect of the present invention, a second high-frequency switch selects one of a reception-side output of the antenna duplexer and an output of the reception filter having a TDD mode pass band frequency. The wireless device according to claim 4, wherein the signal is input to a low-noise amplifier shared by both the FDD mode and the TDD mode, and a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

According to a thirteenth aspect of the present invention, one of the receiving-side output of the antenna duplexer and the second output of the high-frequency SW is selected by a second high-frequency SW, and FDD and TDD are selected.
9. The wireless device according to claim 8, wherein the signal is input to a low-noise amplifier shared in both modes.
And a dual mode wireless device compatible with the TDD system.

The invention according to claim 14 of the present invention relates to the FDD
A wireless device that performs a diversity reception operation in a mode, wherein a first reception circuit for an FDD mode is connected to a reception side output of the antenna duplexer, and a second reception circuit having a pass band frequency of a TDD mode is connected to an output of the reception filter having a TDD mode pass band frequency. 2 high frequency SW
And the second input of the second high-frequency SW
A receiving filter having a pass band frequency in the FDD mode and a second antenna are connected, and a receiving circuit connected to the output of the second high-frequency SW is a second receiving circuit or a T
The wireless device according to any one of claims 2 to 4, which operates as a receiving circuit for the DD mode, and can realize a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system.

The invention according to claim 15 of the present invention provides the following:
Of the second antenna duplexer,
The second output of the first high-frequency SW is connected to the TDD mode band side input, and the second antenna is connected to the FDD mode band side input of the second antenna duplexer.
4. The dual mode wireless device according to item 4, wherein the dual mode wireless device supports the simultaneous transmission / reception FDD system and the TDD system.

[0092] The invention according to claim 16 of the present invention provides an FDD
A wireless device performing a diversity reception operation in a mode, comprising: a second antenna, a reception filter having a pass band frequency in an FDD mode, and a second filter for connecting and disconnecting the reception filter and a second output of the high-frequency SW. High frequency SW
9. The wireless device according to claim 6, wherein a receiving circuit for the TDD mode is shared as a second receiving circuit for the FDD mode.
A dual mode wireless device compatible with the DD system can be realized.

The invention according to claim 17 of the present invention is characterized in that
17. The wireless device according to claim 3, wherein the bias condition of the power amplifier of the transmission unit is switched in conjunction with the switching between the two modes, TDD and TDD. A dual-mode wireless device can be realized.

According to an eighteenth aspect of the present invention, the first output of the high-frequency switch is connected to a transmission circuit provided for the TDD mode, and the second output of the high-frequency switch is connected to the antenna duplexer. 3. The wireless device according to claim 2, wherein a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 19 of the present invention is characterized in that a receiving circuit is connected to a receiving side output of the antenna duplexer, and a transmitting circuit for FDD mode is connected to a transmitting side input of the antenna duplexer. 19. The radio apparatus according to claim 18, wherein a transmission filter having a pass band frequency of a TDD mode is connected to a second output of the high-frequency SW.
A dual mode wireless device compatible with the D system and the TDD system can be realized.

According to a twentieth aspect of the present invention, a power amplifier for an FDD mode is connected to a transmission-side input of the antenna duplexer, and a TDD is provided downstream of the transmission filter having a pass band frequency of a TDD mode. 20. The wireless communication system according to claim 18, wherein a power amplifier for a mode is connected, an input of the power amplifier for the FDD mode and an input of the power amplifier for the TDD mode are selected and connected to a transmission circuit. A dual-mode wireless device that is compatible with the simultaneous transmission / reception FDD system and the TDD system.

The invention according to claim 21 of the present invention is characterized in that
System and a dual mode wireless device corresponding to the FDD system performing simultaneous transmission and reception operations, an antenna duplexer, comprising a high-frequency SW between the receiving side output and the receiving circuit of the antenna duplexer, the antenna duplexer in FDD mode The transmission and reception operation is performed by using the high frequency S in the TDD mode.
This is a wireless device characterized by performing transmission / reception switching using W, and can realize a dual mode wireless device compatible with simultaneous transmission / reception FDD and TDD systems.

According to a twenty-second aspect of the present invention, the first output of the high-frequency SW is connected to a receiving circuit,
22. The wireless device according to claim 21, wherein the second output of the wireless communication device is connected to a transmission circuit provided for the TDD mode, thereby realizing a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system. it can.

According to a twenty-third aspect of the present invention, a power amplifier for an FDD mode is connected to a transmission-side input of the antenna duplexer, and a power amplifier for a TDD mode is connected to a second output of the high-frequency SW. The wireless device according to claim 21 or 22, wherein an input of the power amplifier for the FDD mode and an input of the power amplifier for the TDD mode are selected and connected to a transmission circuit. Method and TDD
It is possible to realize a dual mode wireless device compatible with the system.

The invention according to claim 24 of the present invention is characterized in that FDD
24. The wireless device according to claim 20, wherein the power of a power amplifier not used in the current mode is cut off in conjunction with switching between the two modes, TDD and TDD. And a dual mode wireless device compatible with the TDD system.

The invention according to claim 25 of the present invention is characterized in that
The power amplifier for FDD mode is constituted by a power amplifier circuit using GaAs-FET, and the power amplifier for TDD mode is constituted by a power amplifier circuit using bipolar transistors. A wireless device according to claim 23, wherein a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 26 of the present invention relates to the FDD
In the power amplifier for the mode, the saturation output point of the amplifier circuit is set high, the wireless device according to claim 20 or claim 23, wherein the linear operation is performed at the time of maximum power transmission, the simultaneous transmission and reception FDD system and A dual mode wireless device compatible with the TDD system can be realized.

According to a twenty-seventh aspect of the present invention, one of a transmission-side input of an antenna duplexer and an input of a transmission filter having a pass band frequency in a TDD mode is selected by a second high-frequency SW. , TDD and FDD, and a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system.

According to a twenty-eighth aspect of the present invention, one of the transmission-side input of the antenna duplexer and the second output of the high-frequency SW is selected by the second high-frequency SW, and is selected in both TDD and FDD modes. 24. The wireless device according to claim 23, wherein the wireless device is connected to a shared power amplifier.
A dual mode wireless device compatible with the DD system can be realized.

An invention according to claim 29 of the present invention is a radio apparatus for performing a diversity reception operation, wherein a reception filter is connected to the second antenna, and FDD is connected to the reception filter.
And a second receiving circuit shared by both the TDD mode and the TDD mode is connected.
2. A dual mode wireless device that supports the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 30 of the present invention relates to the FDD
30. The wireless device according to claim 18, wherein the bias condition of the low-noise amplifier of the receiving unit is switched in conjunction with the switching between the two modes of TDD and TDD. A compatible dual mode wireless device can be realized.

The invention according to claim 31 of the present invention is characterized in that
In a dual mode wireless device corresponding to the FDD system performing simultaneous transmission and reception operation, an upconverter,
The down converter, the first local oscillator, the two divider, the transmission intermediate frequency circuit for the FDD mode, the transmission intermediate frequency circuit for the TDD mode, and the outputs of the two transmission intermediate frequency circuits are selected and up. Switching means for inputting to the converter, and setting the frequencies of the two transmission intermediate frequency circuits to be different so that the frequency of the first local oscillator is the same in both the FDD and TDD modes. It is a wireless device and can realize a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system.

The invention according to claim 32 of the present invention is characterized in that
A first quadrature modulator as a transmission intermediate frequency circuit for the FDD mode, and an IF filter corresponding to a transmission intermediate frequency in the FDD mode, and a second quadrature modulator as the transmission intermediate frequency circuit for the TDD mode; 32. The wireless device according to claim 31, further comprising: an IF filter corresponding to a transmission intermediate frequency in the TDD mode, which can realize a dual mode wireless device compatible with simultaneous transmission / reception FDD and TDD.

The present invention according to claim 33 of the present invention provides the following:
And a third local oscillator, and the output of the second local oscillator is distributed to a second quadrature modulator and a receiving intermediate frequency circuit, and the output of the third local oscillator is 33. The wireless device according to claim 32, wherein the signal is input to the first quadrature modulator, and a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

According to a thirty-fourth aspect of the present invention, in the transmission intermediate frequency circuit, the only quadrature modulators are FDD and T
34. The switching device according to claim 32, wherein an IF filter corresponding to the transmission intermediate frequency in the FDD mode and an IF filter corresponding to the transmission intermediate frequency in the TDD mode are switched and used in both the DD mode. The wireless device described above can realize a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system.

According to a thirty-fifth aspect of the present invention, a high frequency SW is connected to a local oscillation input of a quadrature modulator, and an output of a second local oscillation section or an output of a third local oscillation section is selected. 35. The wireless device according to claim 34, wherein the signal is input to a quadrature modulator, and a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 36 of the present invention relates to the second aspect.
A local oscillator, a first frequency divider, and a second frequency divider, wherein the output of the first frequency divider is input to the first quadrature modulator, and the second frequency divider 34. The wireless device according to claim 32 or claim 33, wherein the dual-mode wireless device corresponding to the simultaneous transmission / reception FDD system and the TDD system can be realized.

The present invention according to claim 37 of the present invention provides the following:
, A first multiplier, and a second multiplier, wherein the output of the first multiplier is input to the first quadrature modulator, and the second multiplier is provided. 34. The radio apparatus according to claim 32, wherein the output of the second quadrature modulator is input to the second quadrature modulator.
It is possible to realize a dual mode wireless device compatible with the system.

The invention according to claim 38 of the present invention is characterized in that TDD
In a dual mode wireless device corresponding to the FDD system performing simultaneous transmission and reception operation, an upconverter,
A down converter, a first local oscillator, a two divider, a transmission intermediate frequency circuit, and a second local oscillator,
By operating the transmission intermediate frequency circuit as a quadrature modulator in the TDD mode and operating the transmission intermediate frequency circuit as a frequency conversion section in the FDD mode, the first local oscillation circuit is operated in both the FDD and TDD modes. And a second local oscillation unit having the same frequency, wherein the simultaneous transmission and reception FDD system and T
A dual mode wireless device compatible with the DD system can be realized.

The invention according to claim 39 of the present invention is characterized in that
In a dual mode wireless device corresponding to the FDD system performing simultaneous transmission and reception operation, an upconverter,
A down converter, a first local oscillator, a two divider, a reception intermediate frequency circuit for an FDD mode, a reception intermediate frequency circuit for a TDD mode, and an output of the down converter to the two reception intermediate frequency circuits. Switching means for selecting and inputting any one of them is provided, and by setting the frequencies of the two receiving intermediate frequency circuits to be different, the frequency of the first local oscillation unit is made the same in both the FDD and TDD modes. Characterized in that it is a simultaneous transmission / reception FDD
And a dual mode wireless device compatible with the TDD system.

The invention according to claim 40 of the present invention is characterized in that
A first quadrature demodulator as a reception intermediate frequency circuit for the FDD mode, and an IF filter corresponding to the reception intermediate frequency in the FDD mode; a second quadrature demodulator as the reception intermediate frequency circuit for the TDD mode; The wireless device according to claim 39, further comprising an IF filter corresponding to a reception intermediate frequency in the TDD mode, and a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system.

The invention according to claim 41 of the present invention is characterized in that
And a third local oscillator, and the output of the second local oscillator is distributed to a second quadrature demodulator and a transmission intermediate frequency circuit, and the output of the third local oscillator is 41. The wireless device according to claim 40, wherein the wireless device is input to the first quadrature demodulator, and can realize a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system.

According to the invention of claim 42 of the present invention, in the receiving intermediate frequency circuit, the only quadrature demodulators are FDD and T
42. A common mode for both DD modes, wherein an IF filter corresponding to a reception intermediate frequency in the FDD mode and an IF filter corresponding to a reception intermediate frequency in the TDD mode are switched and used. The wireless device described above can realize a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system.

According to a forty-third aspect of the present invention, a high frequency SW is connected to a local oscillation input of a quadrature demodulator, and an output of a second local oscillation section or an output of a third local oscillation section is selected. 43. The wireless device according to claim 42, wherein the signal is input to a quadrature demodulator, and a dual mode wireless device compatible with simultaneous transmission / reception FDD and TDD systems can be realized.

The invention according to claim 44 of the present invention is characterized in that
, A first frequency divider, and a second frequency divider, wherein the output of the first frequency divider is input to the first quadrature demodulator, and the second frequency divider 40. The wireless device according to claim 40, wherein the dual-mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 45 of the present invention is characterized in that
, A first multiplier, and a second multiplier, wherein an output of the first multiplier is input to the first quadrature demodulator, and the second multiplier is 43. The radio apparatus according to claim 40, wherein the output of the second quadrature demodulator is input to the second quadrature demodulator.
It is possible to realize a dual mode wireless device compatible with the system.

The invention according to claim 46 of the present invention is characterized in that TDD
In a dual mode wireless device corresponding to the FDD system performing simultaneous transmission and reception operation, an up converter,
A down-converter, a first local oscillator, a two divider, a receiving intermediate frequency circuit, and a second local oscillator,
By operating the reception intermediate frequency circuit as a quadrature demodulator in the TDD mode and operating the reception intermediate frequency circuit as a frequency conversion unit in the FDD mode, the first local oscillation unit in both the FDD and TDD modes. And a second local oscillation unit having the same frequency, and a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 47 of the present invention is characterized in that:
A local oscillation filter is inserted between the two dividers for distributing the output of the local oscillator and the up-converter and the down-converter, the pass band of the filter is set to the local oscillation frequency, and the stop band is set to the FDD and TDD modes. 4. The transmission / reception frequency and the intermediate frequency in the above are set.
The wireless device according to any one of claims 1 to 46, wherein simultaneous transmission / reception FD
A dual mode wireless device compatible with the D system and the TDD system can be realized.

The invention as set forth in claim 48 of the present invention is characterized in that:
The output unit of the frequency divider and the second frequency divider has a 90-degree phase shift function,
45. The radio apparatus according to claim 36, wherein the first frequency divider and the second frequency divider output local oscillation signals having phases different from each other by 90 degrees to the quadrature modulator or the quadrature demodulator. Thus, a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 49 of the present invention relates to the FDD
47. The wireless device according to claim 31, wherein the bias condition of the up-converter or the down-converter is switched in conjunction with the switching between the two modes, TDD and TDD. A dual-mode wireless device can be realized.

The invention according to claim 50 of the present invention is characterized in that FDD
47. The wireless device according to claim 31, wherein the impedance of a matching circuit of an up-converter or a down-converter is switched in conjunction with switching between the two modes of TDD and TDD.
It is possible to realize a dual mode wireless device compatible with the system.

The invention according to claim 51 of the present invention provides the
47. The wireless device according to claim 31, wherein the level of the first local oscillation signal input to the up-converter or the down-converter is switched in conjunction with the switching between the two modes, TDD and TDD. A dual mode wireless device compatible with the FDD system and the TDD system can be realized.

A wireless device according to claim 52 of the present invention is a wireless device using a plurality of local oscillation signals of different frequencies, wherein both the VCO output of the PLL synthesizer section and the frequency divider output in the loop of the PLL synthesizer are provided. Is used as a local oscillation signal. Here, the PLL synthesizer unit refers to, for example, a unit corresponding to a PLL frequency synthesizer unit including a VCO, a frequency divider, and a phase comparator, and the VCO refers to a unit corresponding to a voltage-controlled oscillator.
Further, the frequency divider in the loop of the PLL synthesizer is, for example, one of frequency dividers in the loop of the PLL synthesizer that divides the output of the VCO by a whole number up to the comparison frequency input to the phase comparator. Say the equivalent of Therefore, according to the wireless device of claim 52 of the present invention, VC
Since the output of O is used as the first local oscillation signal and the divider output in the loop of the PLL synthesizer is used as the second local oscillation signal, the VCO of the VCO can be provided without providing a divider outside the loop of the PLL synthesizer. A signal obtained by dividing the output can be obtained.

The wireless device according to claim 53 of the present invention further comprises a PLL in addition to the configuration according to claim 52.
The output of the VCO of the synthesizer unit is input to an external divider, and both the output of the outer divider and the output of the divider in the loop of the PLL synthesizer are used as local oscillation signals.

Therefore, according to the wireless device of claim 53 of the present invention, the frequency divider output in the loop of the PLL synthesizer is used as the second local oscillation signal, and the output of the VCO is divided by the external frequency divider. Is used as the third local oscillation signal, so that only one divider is provided outside the loop of the PLL synthesizer to obtain two signals obtained by dividing the VCO output by different division numbers.

A wireless device according to a fifty-fourth aspect of the present invention, in addition to the configuration according to the fifty-second or fifty-third aspects, further comprises at least two wireless devices in a PLL synthesizer loop.
And a means for extracting the output of the divider at the preceding stage of the two-stage divider, wherein the output is used as a local oscillation signal. Here, the former frequency divider is
For example, a frequency divider that divides the VCO output by 1 / integer
The latter frequency divider refers to, for example, a frequency divider that further divides the signal divided by the previous frequency divider by a factor of one and outputs a comparison frequency. Therefore, according to the wireless device of claim 54 of the present invention, the output of the at least two-stage frequency divider and the output of the previous-stage frequency divider of the two-stage frequency divider are taken out in the loop of the PLL synthesizer. Therefore, a signal with a frequency as high as a fraction of the VCO output is
It can be obtained as a local oscillation signal.

A wireless apparatus according to a fifty-fifth aspect of the present invention, in addition to the configuration according to the fifty-second or fifty-third aspects, further comprises a plurality of frequency dividers in a loop of the PLL synthesizer and a different frequency division number. Means for extracting a plurality of outputs of
The output is used as a local oscillation signal. Here, the plurality of outputs having different frequency division numbers refer to, for example, an output of 1 / N and an output of N × K for integers N and K. Therefore, according to the wireless device according to claim 55 of the present invention, since a plurality of outputs having different frequency division numbers are respectively taken out from a plurality of frequency dividers in the loop of the PLL synthesizer, the output of the loop of the PLL synthesizer is reduced. Without providing a frequency divider, two signals, such as 1 / N and 1 / (N × K), obtained by dividing the VCO output by different frequency division numbers can be obtained.

A wireless apparatus according to claim 56 of the present invention further comprises a means for mixing a plurality of outputs having different numbers of divisions, in addition to the configuration according to any of claims 52 to 55, The output of the mixing means is used as a local oscillation signal. Here, the mixing means refers to, for example, one corresponding to a frequency mixer. Therefore, according to the wireless device of claim 56 of the present invention, there is provided a means for mixing a plurality of outputs having different frequency division numbers, and the output of the mixing means is used as a local oscillation signal. It is possible to easily obtain a signal that is not an integer fraction such as (K + 1) / (N × K).

A wireless device according to a fifty-seventh aspect of the present invention uses a plurality of local oscillation signals of different frequencies in any one of the wireless devices according to the fifty-two through fifty-six for a transmitting operation or a receiving operation. It is characterized by the following.

The invention according to claim 58 of the present invention is characterized in that
In a dual-mode wireless device compatible with the FDD system that performs simultaneous transmission and reception operations, the AG that controls the gain of the transmission / reception circuit in conjunction with switching between both the FDD and TDD modes
This is a wireless device characterized by switching the time response characteristics of the C circuit, and can realize a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and TDD system.

The invention according to claim 59 of the present invention is characterized in that
A dual-mode wireless device compatible with the FDD system that performs simultaneous transmission and reception operations, wherein a rising or falling characteristic of a transmission / reception circuit is switched in conjunction with switching between the FDD and TDD modes. Thus, a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

The invention according to claim 60 of the present invention is characterized in that
In a dual mode wireless device supporting the FDD system and the FDD system performing simultaneous transmission and reception operations, the wireless communication device is characterized in that the time response characteristic of the transmission power detection circuit of the transmission circuit is switched in conjunction with switching between both the FDD and TDD modes. A dual-mode wireless device that is compatible with the simultaneous transmission / reception FDD system and the TDD system.

The invention according to claim 61 of the present invention is characterized in that
System and a dual mode wireless device supporting the FDD system that performs simultaneous transmission / reception operations, characterized in that the configuration is such that the loop gain of the PLL synthesizer of the local oscillator is switched in conjunction with the switching of both the FDD and TDD modes. And a dual-mode wireless device that supports the simultaneous transmission / reception FDD system and the TDD system.

The invention according to claim 62 of the present invention is directed to the FDD
62. The wireless device according to claim 61, wherein the comparison frequency of the PLL synthesizer is switched in synchronization with switching between the two modes, TDD and TDD.
A dual mode wireless device compatible with the FDD system and the TDD system can be realized.

The invention as set forth in claim 63 of the present invention relates to the FDD
The wireless device according to claim 61, wherein the wireless device is configured to switch the loop filter bandwidth of the PLL synthesizer in conjunction with switching between the two modes, and TDD.
A dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized.

An invention according to claim 64 of the present invention is directed to a wireless portable device comprising the wireless device according to claims 2 to 63, wherein the dual mode wireless communication device supports the simultaneous transmission / reception FDD system and the TDD system. A portable device can be realized.

An invention according to claim 65 of the present invention is a radio base station provided with the radio apparatus according to claims 2 to 63, wherein the dual-mode radio is compatible with the simultaneous transmission / reception FDD system and the TDD system. A base station can be realized.

An invention according to claim 66 of the present invention is a wireless communication system configured to include the wireless portable device according to claim 64 and the wireless base according to claim 65, and is compatible with the simultaneous transmission / reception FDD system and TDD system. A compatible dual mode wireless communication system can be realized.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

(First Embodiment) As shown in FIG. 1, a radio apparatus according to a first embodiment includes an antenna duplexer 100,
A first antenna 101, high-frequency switches 102 and 106, low-noise amplifiers 103 and 104, a reception filter 105, and a reception circuit 107
And a power amplifier 108 and a transmission circuit 109.

Hereinafter, for convenience, the transmission frequency in the FDD mode is set to 1
The explanation is made on the assumption that 900 MHz, the reception frequency in the FDD mode is 1700 MHz, and the transmission / reception frequency in the TDD mode is 1900 MHz. The first antenna 101 is an antenna disposed inside or outside the device, and its operating frequency range is 1700 to 1900 MHz.
The high-frequency switches 102 and 106 are low-loss high-frequency switching circuits generally formed of GaAs-MMIC (gallium arsenide high-frequency monolithic IC).

The antenna duplexer 100 is generally constituted by a BPF composed of a dielectric resonator. The center frequency of the pass band between the common terminal 110 and the transmission-side input 111 is 1900 MHz. The passband center frequency with the side output 112 is 1700 MHz. Further, an isolation of about 40 dB or more is secured between the transmission-side input 111 and the reception-side output 112.

The low-noise amplifier 103 is formed of a GaAs-MOSFET, and the low-noise amplifier 104 is formed of a bipolar transistor. The operating frequencies are 1700 MHz and 1900 MHz, and the power supply is controlled by 113 and 114. further,
The low noise amplifier 104 is provided with an input matching circuit that matches the noise figure minimum impedance of the amplifying element.

The reception filter 105 is generally a BPF composed of a dielectric resonator, and has a pass band center frequency of 1900 MHz.
Hz. The receiving circuit 107 is a receiving circuit that operates in a wide band from 1700 MHz to 1900 MHz, and generally performs an operation of demodulating a received signal down-converted to an intermediate frequency.

The power amplifier 108 is a high-output amplifier generally composed of a GaAs-MMIC, and has an operating frequency of 1900 MHz.
It is. Transmission circuit 109 generally performs an operation of up-converting a transmission signal whose intermediate frequency has been modulated to 1900 MHz.

The operation of the wireless device configured as described above in the FDD mode will be described. In the FDD mode, the high-frequency SW 102 selects the duplexer 100 side, and the high-frequency SW 10
6 is controlled to select the low noise amplifier 103 side. The 1900 MHz transmission signal output from the transmission circuit 109 is amplified by the power amplifier 108 and input to the transmission side of the antenna duplexer 100.
From 111, the signal passes through the common terminal 110, is input to the first antenna 101 via the high-frequency SW 102, and is radiated.

Also, 1700M received by the first antenna 101
The received signal of Hz passes through the receiving terminal output 112 from the common terminal 110 of the antenna sharing device via the high frequency SW 102 and is input to the low noise amplifier 103. The low noise amplifier 103 is supplied with a power supply 113 and amplifies a received signal. The amplified signal is
The signal is input to the receiving circuit 107 via the high-frequency SW 106 and demodulated. At this time, the low-noise amplifier 104 does not operate because the power supply 114 is shut off. In the FDD mode, the above transmission and reception operations are performed simultaneously and continuously.

On the other hand, in the TDD mode, in the present embodiment, the transmission frequency is 1900 MHz as in the FDD mode, but the reception frequency is 1900 MHz unlike the FDD mode.
In addition, an operation for sequentially switching the transmission / reception operation in time is required.

At the time of transmission in the TDD mode, the high-frequency SW 102 selects the antenna duplexer 100 and performs a transmission operation in the same manner as in the FDD mode.

At the time of reception in the TDD mode, the high-frequency SW1
02 is controlled to select the reception filter 105 side, and the high frequency SW 106 is controlled to select the low noise amplifier 104 side.

Therefore, the 1900 MHz reception signal received by the first antenna 101 passes through the reception filter 105 via the high frequency SW 102 and is input to the low noise amplifier 104. The low-noise amplifier 104 is supplied with a power supply 114 and amplifies a received signal. After being amplified, the received signal is input to the receiving circuit 107 via the high-frequency SW 106 and demodulated.

At this time, the low noise amplifier 103 does not operate because the power supply 113 is shut off. In the TDD mode, the above-mentioned transmission and reception operations are performed at fixed time intervals (for example, 2.5 mSec).
The high-frequency SW 102 is controlled so that transmission and reception are repeated in each case).

In general, the low noise amplifier 103 corresponds to a large signal transmission wave leaking through the antenna duplexer 100 in the FDD mode, and is generally required in a FDD mode system (for example, a CDMA system). In order to secure the required low distortion performance, it is designed so that the intermodulation characteristics are emphasized. Further, the low-noise amplifier 104 is generally designed not to require the above-described intermodulation characteristics in the TDD mode, and is therefore designed to emphasize low-noise characteristics. The method of optimization design is not limited to the above, and can be optimally designed for each system. In addition, regarding the operation of the power amplifier 108, the bias condition of the power amplifier of the transmission unit is switched in conjunction with the switching of both the FDD and TDD modes. Improved and in TDD mode,
Switching can be performed to reduce the operating current.

As described above, in the first embodiment, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a simple configuration.

(Second Embodiment) As shown in FIG. 2, the radio apparatus of the second embodiment includes a high-frequency SW 115 and a low-noise amplifier 116, as shown in FIG. Wireless device. In FIG. 2, components denoted by the same reference numerals as those in FIG. 1 perform the same operations.

In FIG. 2, the high-frequency SW 115 selects the output 112 on the receiving side of the antenna duplexer 100 or the output of the receiving filter 105 and inputs it to the low-noise amplifier 116. Low noise amplifier 1
The 16 has an operation frequency band of 1700 MHz to 1900 MHz, and operates as an amplifier shared by both FDD and TDD modes.

In the wireless device configured as described above, in the FDD mode, the high-frequency switches 102 and 115 are controlled so as to select the antenna duplexer 100 side. Therefore,
The 1700 MHz received signal received by the first antenna 101 is amplified by the low-noise amplifier 116 via the high-frequency SW 102, the antenna duplexer 100, and the high-frequency SW 115, and is demodulated by the receiving circuit 107.

On the other hand, when transmitting in the TDD mode,
02 is controlled to select the antenna duplexer 100 side. Also, when receiving in the TDD mode, the high-frequency SWs 102 and 11
5 is controlled to select the reception filter 105 side.
Therefore, the 1900 MHz received signal received by the first antenna 101 is transmitted to the high-frequency SW 102, the reception filter 105, and the high-frequency SW 11
The signal is amplified by the low-noise amplifier 116 via 5 and demodulated in the receiving circuit 107.

The operation of the low-noise amplifier 116 can be switched to an operation state exhibiting optimum performance in conjunction with switching between the FDD and TDD modes.

As described above, in the second embodiment, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a simple configuration.

(Third Embodiment) As shown in FIG. 3, a radio apparatus according to a third embodiment comprises a second antenna 117, a reception filter 118, a first reception circuit 119, and a second reception circuit. 12
0 is different from the wireless device of the first embodiment in FIG. In FIG. 3, components denoted by the same reference numerals as those in FIG. 1 perform the same operations.

The wireless device shown in FIG. 3 is different from the wireless device of the first embodiment in FIG.
It is designed to support diversity reception in D mode.

The second antenna 117 is an antenna disposed inside or outside the device, and has an operating frequency of 1700 MHz.
z. The reception filter 118 is generally a BPF composed of a dielectric resonator, and has a passband center frequency of 1700 MHz. The first reception circuit 119 is a reception circuit dedicated to the FDD mode that operates at a frequency of 1700 MHz, and performs an operation of demodulating a reception signal down-converted to an intermediate frequency after low-noise amplification.

The second receiving circuit 120 has a frequency of 1700 MHz to 19
A receiving circuit that operates at 00 MHz and is common to both the FDD and TDD modes performs an operation of demodulating a received signal down-converted to an intermediate frequency after low-noise amplification.

In the radio apparatus configured as described above, when receiving in the FDD mode, the high-frequency SW 102 is controlled to select the antenna duplexer 100 side, and the high-frequency SW 115 is controlled to select the reception filter 118 side. Therefore, the received signal of frequency 1700 MHz received by the first antenna 101
The signal is demodulated in the receiving circuit 119 via the SW 102 and the antenna duplexer 100. Further, the reception signal having a frequency of 1700 MHz received by the second antenna 117 is received by the reception filter 118 and the high-frequency SW.
The signal is demodulated in the receiving circuit 120 via 115. By combining (or selecting) the signals demodulated by the receiving circuits 119 and 120 by baseband signal processing, a diversity receiving operation is performed.

On the other hand, at the time of reception in the TDD mode,
02 selects the reception filter 105 side, and the high-frequency SW 115 is controlled to select the reception filter 105 side. Therefore, the reception signal of the frequency 1900 MHz received by the first antenna 101 is transmitted to the high-frequency SW 102, the reception filter 105, and the high-frequency SW 115
The signal is demodulated in the receiving circuit 120 via.

As described above, in the third embodiment, the simultaneous transmission / reception FD corresponding to the diversity reception in the FDD mode is performed.
D-mode and TDD-mode dual-mode wireless devices can be realized with a simple configuration.

(Fourth Embodiment) The radio equipment according to the fourth embodiment has an antenna duplexer 121 as shown in FIG. 4, and is different from the radio equipment according to the third embodiment shown in FIG. Is different. In FIG. 4, components denoted by the same reference numerals as those in FIG. 3 perform the same operations.

The radio apparatus shown in FIG. 4 is obtained by replacing the reception filters 105 and 118 and the high-frequency SW 115 in the radio apparatus of the third embodiment shown in FIG. The antenna duplexer 121 is generally constituted by a BPF composed of a dielectric resonator. The center frequency of the pass band between the common terminal 122 and the terminal 123 is 1900 MHz, and the common terminal 1
The center frequency of the pass band between 22 and terminal 124 is 1700 MHz. Further, an isolation of about 40 dB or more is secured between the terminal 123 and the terminal 124.

In the radio apparatus configured as described above, at the time of reception in the FDD mode, the reception signal of frequency 1700 MHz received by second antenna 117 is demodulated in reception circuit 120 via antenna duplexer 121.

At the time of reception in the TDD mode, the high-frequency SW1
02 selects the antenna duplexer 121 side, and the received signal of the frequency 1900 MHz received by the first antenna 101 is transmitted to the high-frequency SW 102,
The signal is demodulated in the receiving circuit 120 via the antenna duplexer 121. Note that the antenna duplexer 121 is
The same can be used.

As described above, in the fourth embodiment, the simultaneous transmission / reception FD corresponding to the diversity reception in the FDD mode is performed.
D-mode and TDD-mode dual-mode wireless devices can be realized with a simple configuration.

(Fifth Embodiment) As shown in FIG. 5, the wireless device of the fifth embodiment is composed of the same elements as those of FIG. 1, and differs from the wireless device of the first embodiment in the following. high frequency
The only difference is that the insertion position of SW102 has been changed. In FIG. 5, components denoted by the same reference numerals as those in FIG. 1 perform the same operations.

In FIG. 5, in the FDD mode, the high frequency SW1
02 is controlled to select the power amplifier 108 side, and the high frequency SW 106 is controlled to select the low noise amplifier 103 side. Therefore,
The transmission signal is transmitted by the transmission circuit 109, the power amplifier 108, the high-frequency SW 10
2. Radiated from the first antenna 101 via the antenna duplexer 100. Frequency 1700MHz received by the first antenna 101
The received signal of the antenna duplexer 100, the low noise amplifier 103,
The signal is demodulated in the receiving circuit 107 via the high-frequency SW 106.

When receiving in the TDD mode, the high-frequency SW1
02 and 106 select the low noise amplifier 104 side, and the first antenna
The received signal having a frequency of 1900 MHz received by 101 includes an antenna duplexer 100, a high-frequency SW 102, a low-noise amplifier 104, and a high-frequency SW1.
The signal is demodulated in the receiving circuit 120 via the signal line 06.

As described above, in the fifth embodiment, a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a simple configuration.

(Sixth Embodiment) As shown in FIG. 6, the wireless device of the sixth embodiment is composed of the same elements as those of FIG. 2, and is different from the wireless device of the second embodiment. high frequency
The only difference is that the insertion position of SW102 has been changed. In FIG. 6, components denoted by the same reference numerals as those in FIG. 2 perform the same operations.

In FIG. 6, in the FDD mode, the high-frequency SW1
02 is controlled to select the power amplifier 108 side, and the high-frequency SW 115 is controlled to select the antenna duplexer 100. Therefore,
The transmission signal is transmitted by the transmission circuit 109, the power amplifier 108, the high-frequency SW 10
2. Radiated from the first antenna 101 via the antenna duplexer 100. Frequency 1700MHz received by the first antenna 101
Is demodulated in the receiving circuit 107 via the duplexer 100, the high-frequency SW 115, and the low-noise amplifier 116.

When receiving in the TDD mode, the high-frequency SW1
02 selects the high-frequency SW115 side, and the high-frequency SW115 selects the high-frequency SW102 side. The received signal of the frequency 1900 MHz received by the first antenna 101 is transmitted to the antenna duplexer 100, the high-frequency SW102,
The signal is demodulated in the receiving circuit 107 via the SW 115 and the low noise amplifier 116. The high-frequency SWs 102 and 115 are connected to one DPDT.
-Can be configured as SW.

As described above, in the sixth embodiment, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a simple configuration.

(Seventh Embodiment) The wireless device of the seventh embodiment differs from the wireless device of the third embodiment of FIG. 3 in that it has a high-frequency SW 125 as shown in FIG. ing. In FIG. 7, components denoted by the same reference numerals as those in FIG. 3 perform the same operations.

In FIG. 7, the high frequency SW 125 is the high frequency SW 1
02 and the receiving circuit 120 are connected very close to each other. F
In the DD mode, the high-frequency SW 102 selects the antenna duplexer 100 side, and the high-frequency SW 125 is controlled to be connected. Therefore, the frequency 1700 MHz received by the second antenna 117
Is demodulated in the receiving circuit 120 via the receiving filter 118 and the high-frequency SW 125.

In the TDD mode, the high frequency SW 125 is opened. Therefore, the received signal of frequency 1900 MHz received by the first antenna 101 is transmitted to the antenna duplexer 100
The signal is demodulated in the receiving circuit 120 via the SW 102.

As described above, in the seventh embodiment, the simultaneous transmission / reception FD corresponding to the diversity reception in the FDD mode is performed.
D-mode and TDD-mode dual-mode wireless devices can be realized with a simple configuration.

(Eighth Embodiment) As shown in FIG. 8, the radio apparatus of the eighth embodiment includes a transmission filter 126, power amplifiers 127 and 128, a high-frequency SW 129, and a transmission circuit 130. This is different from the wireless device of the first embodiment in FIG. In FIG. 8, components denoted by the same reference numerals as those in FIG. 1 perform the same operations.

Hereinafter, for convenience, the transmission frequency in the FDD mode is set to 1
In the following description, 900 MHz, the reception frequency in the FDD mode is 1700 MHz, and the transmission / reception frequency in the TDD mode is 1700 MHz. The transmission filter 126 is generally a BPF composed of a dielectric resonator, and has a passband center frequency of 1700 MHz.

Power amplifiers 127 and 128 are generally GaAs-M
It is composed of a high output amplifier composed of MIC, but the power amplifier 127 is composed of a power amplifier circuit using GaAs-FET,
The power amplifier 128 may be constituted by a power amplifier circuit using bipolar transistors, and the operating frequency is 1700 MHz and 1
900 MHz. In the power amplifier 127, it is desirable to set the saturation output point of the amplifier circuit to be high, and to operate linearly at the time of maximum power transmission. Transmission circuit 130
Is a transmission circuit that operates in a wide band at an operating frequency of 1700 MHz to 1900 MHz, and generally performs an operation of up-converting a transmission signal whose intermediate frequency has been modulated to a frequency of 1700 MHz or 1900 MHz.

The operation of the wireless device configured as described above in the FDD mode will be described. In the FDD mode, the high frequency SW 102 selects the antenna duplexer 100 side, and the high frequency SW 12
9 is controlled to select the power amplifier 128 side. Therefore, the transmission signal having a frequency of 1900 MHz is transmitted by the transmission circuit 130, the high-frequency SW 129, the power amplifier 128, the antenna duplexer 100, and the high-frequency S
Radio waves are input to the first antenna 101 via W102 and emitted.

The received signal of frequency 1700 MHz received by the first antenna 101 is transmitted to the high-frequency SW 102 and the antenna duplexer.
100, is input to the receiving circuit 107 via the low noise amplifier 103 and demodulated. At this time, the power amplifier 127 does not operate because the power supply 131 is shut off. In the FDD mode, the above transmission and reception operations are performed simultaneously and continuously.

On the other hand, in the TDD mode, in the present embodiment, the reception frequency is 1700 MHz similarly to the FDD mode, but the transmission frequency is 1700 MHz unlike the FDD mode.
In addition, an operation for sequentially switching the transmission / reception operation in time is required.

At the time of transmission in the TDD mode, the high-frequency SW 102 selects the transmission filter 126 side, and the high-frequency SW 129 selects the power amplifier 12.
Controlled to select 7 side. Therefore, frequency 1
The 700 MHz transmission signal is input to the first antenna 101 via the transmission circuit 130, the high-frequency SW 129, the power amplifier 127, the transmission filter 126, and the high-frequency SW 102, and a radio wave is emitted.

Also, at the time of reception in the TDD mode, the high-frequency SW1
02 selects the antenna duplexer 100 side and performs the same receiving operation as in the FDD mode. At this time, the power amplifier 128
32 is shut off and does not work. In the TDD mode, the above transmission and reception operations are performed at fixed time intervals (for example,
High frequency S so that transmission and reception are repeated every 2.5 mSec)
W102 is controlled.

In general, power amplifier 128 is designed so as to emphasize intermodulation characteristics in order to secure low distortion performance required in an FDD mode system (for example, a CDMA system). Also, the power amplifier 127 generally does not often require the above intermodulation characteristics in the TDD mode,
It is designed to emphasize low current. The method of optimization design is not limited to the above, and can be optimally designed for each system. In addition, regarding the operation of the low-noise amplifier 103, the bias condition of the power amplifier of the receiving unit is switched in conjunction with the switching of both the FDD and TDD modes. In the TDD mode, switching can be performed to reduce the operating current.

As described above, in the eighth embodiment, a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a simple configuration.

(Ninth Embodiment) The radio equipment according to the ninth embodiment is provided with a high-frequency SW 133 and a power amplifier 134 as shown in FIG. Wireless device. In FIG. 9, components denoted by the same reference numerals as those in FIG. 8 perform the same operations.

In FIG. 9, the high-frequency SW 133 selects the transmission-side input 111 or the transmission filter 126 of the duplexer 100 and connects it to the power amplifier 134. Power amplifier 134 is 1700
MHz to 1900MHz operating frequency band, FDD
And the amplifier operates in both TDD and TDD modes.

In the radio apparatus configured as described above, in the FDD mode, the high-frequency switches 102 and 133 are controlled so as to select the antenna duplexer 100 side. Therefore,
The transmission signal is radiated via the duplexer 100.
Further, at the time of transmission in the TDD mode, the high-frequency SW 102 is controlled so as to select the transmission filter 126 side. Therefore,
The transmission signal is radiated through the transmission filter 126.

Note that the operation of the power amplifier 134 is
In conjunction with switching between the DD and TDD modes, it is possible to switch to an operating state that exhibits optimal performance.

As described above, in the ninth embodiment, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a simple configuration.

(Tenth Embodiment) As shown in FIG. 10, the wireless device of the tenth embodiment is composed of the same elements as those of FIG. 8, and is different from the wireless device of the eighth embodiment. The only difference is that the insertion location of the high-frequency SW 102 is changed. In FIG. 10, components denoted by the same reference numerals as those in FIG. 8 perform the same operations.

In FIG. 10, in the FDD mode, the high frequency S
W102 is controlled to select the low-noise amplifier 103 side, and high-frequency SW129 is controlled to select the power amplifier 128 side. Therefore, the transmission signal is radiated via the 1900 MHz band side of the duplexer 100. During transmission in the TDD mode, the high-frequency SWs 102 and 129 are controlled to select the power amplifier 127 side. Therefore, the transmission signal is
Radiated via 100 1700MHz band side.

As described above, in the tenth embodiment, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a simple configuration.

(Eleventh Embodiment) As shown in FIG. 11, the radio apparatus of the eleventh embodiment is composed of the same elements as those of FIG. 9, and differs from the radio apparatus of the ninth embodiment in the following. The only difference is that the insertion location of the high-frequency SW 102 is changed. In FIG. 11, components denoted by the same reference numerals as those in FIG. 9 perform the same operations.

In FIG. 11, in the FDD mode, the high frequency S
W102 is controlled to select the low noise amplifier 103 side, and the high frequency SW133 is controlled to select the antenna duplexer 100 side. Therefore, the transmission signal is radiated via the 1900 MHz band side of the duplexer 100. Also, when transmitting in TDD mode,
The high-frequency SW 102 is controlled to select the high-frequency SW 133, and the high-frequency SW 133 is controlled to select the high-frequency SW 102. Therefore, the transmission signal is radiated through the 1700 MHz band side of the duplexer 100.

As described above, in the eleventh embodiment, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a simple configuration.

(Twelfth Embodiment) As shown in FIG. 12, a radio apparatus according to a twelfth embodiment has a first receiving circuit 135.
The second embodiment is different from the wireless device of the eighth embodiment shown in FIG. In FIG.
Those denoted by the same reference numerals as those in FIG. 8 perform the same operations.

The radio apparatus shown in FIG. 12 differs from the radio apparatus of the eighth embodiment shown in FIG. 8 in that a second reception system is added.
It is designed to support diversity reception in both FDD and TDD modes. First receiving circuit 135 and second receiving circuit
The receiving circuit 136 is a receiving circuit that operates at a frequency of 1700 MHz and is common to both the FDD and TDD modes, and performs an operation of demodulating a received signal down-converted to an intermediate frequency after low-noise amplification.

In the radio apparatus configured as described above, in both the FDD and TDD modes, the reception signal of frequency 1700 MHz received by second antenna 117 is received by reception filter 1.
The signal is demodulated in the receiving circuit 136 via. The signals demodulated by the two receiving circuits 135 and 136 are combined (or selected) by baseband signal processing, whereby a diversity receiving operation is performed.

As described above, in the twelfth embodiment, the FDD
In both the TDD mode and the TDD mode, it is possible to realize a simultaneous transmission / reception FDD system and a TDD system dual mode wireless device compatible with diversity reception with a simple configuration.

(Thirteenth Embodiment) A wireless device according to a thirteenth embodiment has an upconverter as shown in FIG.
200, a down converter 201, a two divider 202,
Local oscillator 203, high-frequency SW 204, transmission IF filter 205
And 206, transmission IF circuits 207 and 208, and reception IF filter 2
09, a reception IF circuit 210, a two-way divider 211, a second local oscillator 212, and a third local oscillator 213.

[0216] Hereinafter, for convenience, the transmission frequency in the FDD mode is set to 1
900MHz, FDD mode reception frequency 1700MHz, TDD mode transmission / reception frequency 1700MHz, FDD mode transmission IF frequency
The description will be made assuming that the reception IF frequency in the FDD mode and the IF frequency in the TDD mode are 200 MHz.

The up-converter 200 includes a diode or an FET.
A mixer composed of a semiconductor such as
MHz or 400 MHz) and the frequency component of the sum (or difference) between the first local oscillation signal (1500 MHz) and the transmission signal 215 (1700 MHz or 19
00MHz).

The down converter 201 includes a diode or an FET.
A mixer composed of semiconductors, etc., receives the received signal 216 (1700M
Hz) and the sum (or difference) of the first local oscillation signal (1500 MHz)
Is output as the reception IF signal 217 (200 MHz). The splitter 202 is a power splitter composed of a 3 dB directional coupler, and converts the first local oscillation signal into an up-converter 200.
And down-converter 201.

The first local oscillator 203 comprises a PLL synthesizer, and outputs a 1500 MHz band local oscillation signal. In addition, the first local oscillator 203 can change the frequency at a fixed frequency step (for example, 300 KHz to 5 MHz) at high speed, and determines a frequency channel to be transmitted and received by the wireless device based on the change. The high-frequency SW 204 is a low-loss high-frequency switching circuit.

The transmission IF filters 205 and 206 are generally SAW
It consists of a filter with a passband center frequency of 400 MHz and
At 200 MHz, the bandwidth is the occupied bandwidth of one channel (eg,
300 KHz to 5 MHz). Transmission IF circuits 207 and 208
Is composed of a quadrature modulator, and quadrature-modulates the second and third local oscillation signals (400 MHz or 200 MHz) with an IQ baseband signal input from a baseband signal processing unit and outputs a transmission IF signal.

The reception IF filter 209 is generally composed of a SAW filter, the center frequency of the pass band is 200 MHz, and the bandwidth is set to the occupied bandwidth of one channel (for example, 300 KHz to 5 MHz). The reception IF circuit 210 is configured by a quadrature demodulator, quadrature demodulates the reception IF signal using the third local oscillation signal (200 MHz), converts the signal into an IQ baseband signal, and outputs the IQ baseband signal to the baseband signal processing unit.

The two-way divider 211 is a power divider composed of a 3 dB directional coupler, and transmits the third local oscillation signal to the transmission IF circuit 20.
8 and the reception IF circuit 210. Second and third local oscillators
212 and 213 are composed of PLL synthesizers, and 400
Outputs a local oscillation signal in the MHz or 200 MHz band.

The operation of the wireless device configured as described above in the FDD mode will be described. At the time of transmission in the FDD mode, the high-frequency SW 204 selects the transmission IF filter 205 side, and the 400-MHz transmission IF signal is transmitted to the up-converter 200 via the transmission IF circuit 207, the transmission IF filter 205, and the high-frequency SW 204.
And converted into a 1900 MHz transmission signal 215 and transmitted. At the same time, the 1700 MHz received signal 216 is converted into a 200 MHz received IF signal 217 by the down converter 201, and is orthogonally demodulated by the received IF circuit 210 via the received IF filter 209.

On the other hand, when transmitting in the TDD mode, the high-frequency SW 204
Indicates the transmission IF filter 206 side, and the transmission
The F signal is transmitted by the transmission IF circuit 208, the transmission IF filter 206,
Input to upconverter 200 via W204, 1700M
It is converted into a transmission signal 215 of Hz and transmitted. Also, 1700M
The received signal 216 at 200 Hz
The signal is converted into a reception IF signal 217 of Hz, and is orthogonally demodulated in the reception IF circuit 210 via the reception IF filter 209.

Therefore, generally two types of expensive first local oscillators (both 1900 MHz and 1700 MHz) having a complicated structure are used.
Without the provision, by providing two transmission IF circuits and switching between them, it is possible to cope with both FDD and TDD modes. In conjunction with switching between FDD and TDD modes,
The bias condition of the up-converter or the down-converter is switched to operate under the optimum condition. Further, the impedance of the matching circuit of the up-converter or the down-converter is switched in conjunction with the switching between the FDD mode and the TDD mode, so that the operation is performed under the optimum condition.

[0226] The reception IF filter 209 is used for FDD and TDD.
It can be configured to switch to have different bandwidths in both modes. Although the transmission IF circuits 207 and 208 and the reception IF circuit 210 perform the quadrature modulation / demodulation operation for convenience of explanation, other modulation / demodulation methods (for example, frequency modulation and the like) can obtain the essential effects of the present invention. .

The transmission IF filters 205 and 206 and the reception IF
Although the filter 209 is a SAW filter for convenience of explanation,
The essential effects of the present invention can be obtained by substituting a filter having another configuration or a filter configured by a baseband section.

As described above, in the thirteenth embodiment, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system is realized with a simple configuration by using one first local oscillation unit in common. be able to.

(Fourteenth Embodiment) As shown in FIG. 14, a radio apparatus according to a fourteenth embodiment includes high-frequency SWs 218 and
20 and the transmission IF circuit 219 are the first
This is different from the wireless device of the third embodiment. In FIG. 14, components denoted by the same reference numerals as those in FIG. 13 perform the same operations.

The wireless device shown in FIG. 14 is the same as the wireless device shown in FIG.
In the wireless device of the embodiment, the transmission IF circuits 207 and 208
Are shared by the transmission IF circuit 219. Transmit IF circuit 219
Is composed of a quadrature modulator, and quadrature-modulates the second and third local oscillation signals (400 MHz or 200 MHz) with an IQ baseband signal input from a baseband signal processing unit and outputs a transmission IF signal.

[0231] The high-frequency SW 218 outputs the output of the transmission IF circuit 219,
One of the transmission IF filters 205 or 206 is selected and connected. The high-frequency SW 220 operates to select either the second or third local oscillating unit 212 or 213 as the local oscillating signal input to the transmission IF circuit 219.

In the wireless device configured as described above, at the time of FDD mode transmission, the high-frequency SW 218 selects the side of the transmission IF filter 205, the high-frequency SW 220 selects the side of the second local oscillator 212, and the transmission of 400 MHz is performed. The IF signal is transmitted via a transmission IF filter 205. In the TDD mode transmission, the high-frequency SW 218 selects the transmission IF filter 206 side, and the high-frequency SW 220 selects the third local oscillation unit 213 side.
Are transmitted through the transmission IF filter 206.

Therefore, generally, the first local oscillation unit having a complicated structure and expensive is provided in two systems (both 1900 MHz and 1700 MHz).
Without the provision, by providing two transmission IF circuits and switching between them, it is possible to cope with both FDD and TDD modes.

As described above, in the fourteenth embodiment, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system is realized with a simple configuration by using one first local oscillation unit in common. be able to.

(Fifteenth Embodiment) As shown in FIG. 15, a radio apparatus according to a fifteenth embodiment comprises a
The wireless device according to the thirteenth embodiment shown in FIG. 13 is different from the wireless device according to the thirteenth embodiment in that a four-frequency divider 222, a two divider 223, and a second local oscillator 224 are provided. In FIG. 15, components denoted by the same reference numerals as those in FIG. 13 perform the same operations.

The wireless device shown in FIG.
In the wireless device according to the embodiment, the second and third local oscillation units
212 and 213 are divided by 2 divider 221, 4 divider 222, and 2 divider
223 and the second local oscillator 224.

The second local oscillator 224 outputs a local oscillation signal of 800 MHz. The two divider 223 distributes the 800 MHz local oscillation signal to the two-divider 221 and the fourth divider 222. 2 divider
221 is a transmission IF that divides an 800 MHz signal by 2 and transmits a 400 MHz signal
The signal is output to the circuit 207 as a local oscillation signal.

The four-frequency divider 221 divides the frequency of the 800 MHz signal by four, and
A 00 MHz signal is output to the transmission IF circuit 208 and the reception IF circuit 210 as a local oscillation signal. Therefore, one second local oscillation frequency can be shared by each IF circuit.

As described above, in the fifteenth embodiment, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a configuration in which the number of local oscillation units is minimized.

(Sixteenth Embodiment) A radio equipment according to a sixteenth embodiment comprises a receiving IF filter 22 as shown in FIG.
5 and the configuration of the wireless device of the thirteenth embodiment in that a receiving IF circuit 226 is provided. In FIG.
Components denoted by the same reference numerals as those of the wireless device according to the thirteenth embodiment in FIG. 13 perform the same operations.

In the following, for convenience, the transmission frequency in the FDD mode is set to 1
It is assumed that 900 MHz, the reception frequency in the FDD mode is 1700 MHz, the transmission / reception frequency in the TDD mode is 1900 MHz, the transmission IF frequency in the FDD mode and the IF frequency in the TDD mode are 400 MHz, and the reception IF frequency in the FDD mode is 200 MHz.

The reception IF filter 225 is generally constituted by a SAW filter, has a pass band center frequency of 400 MHz, and a bandwidth set to an occupied bandwidth of one channel (for example, 300 KHz to 5 MHz). The reception IF circuit 226 is composed of a quadrature demodulator, and quadrature demodulates the reception IF signal using the second local oscillation signal (400 MHz), converts it to an IQ baseband signal, and outputs it to the baseband signal processing unit.

In the radio apparatus configured as described above, when transmitting in both the FDD and TDD modes, the transmission IF of 400 MHz is used.
The signal is input to up-converter 200 via transmission IF circuit 207 and transmission IF filter 205, converted into transmission signal 215 having a frequency of 1900 MHz, and transmitted. Also, at the time of reception in the FDD mode, the high-frequency SW 204 selects the reception IF filter 209 side, and the reception signal 216 of the frequency 1700 MHz is converted into the reception IF signal 217 of 200 MHz in the down converter 201,
The signal is orthogonally demodulated in the reception IF circuit 210 via the reception IF filter 209.

On the other hand, when receiving in the TDD mode, the high-frequency SW 204
Has selected the receive IF filter 225 side, the frequency is 1900MHz
Received signal 216 is 400 MHz
, And is orthogonally demodulated in the reception IF circuit 226 via the reception IF filter 225.

Note that the transmission IF filter 205 is a
It can be configured to switch to have different bandwidths in both modes.

As described above, in the sixteenth embodiment, the dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system is realized with a simple configuration by using one first local oscillation unit in common. be able to.

(Seventeenth Embodiment) As shown in FIG. 17, a wireless device according to a seventeenth embodiment includes a reception IFLPF 227,
The configuration differs from the wireless device of the sixteenth embodiment in that a reception first IF circuit 228, a high-frequency SW 229, baseband filters 230 and 231, a reception second IF filter 232, and a reception second IF circuit 233 are provided. ing. In FIG. 17, FIG.
The same reference numerals as in the sixteenth embodiment of the sixteenth embodiment perform the same operations.

In the present embodiment, for convenience, the transmission frequency in the FDD mode is 1900 MHz, and the reception frequency in the FDD mode is 1800 MHz.
z, the transmission / reception frequency in the TDD mode is 1900 MHz, the transmission IF frequency in the FDD mode and the IF frequency in the TDD mode are 400 MHz, and the first reception frequency in the FDD mode is 300 MHz.

The reception IFLPF227 has a cutoff frequency of 450 MHz.
Is a low-pass filter. Receive first IF circuit 228
Is configured to operate as both a quadrature demodulator and a frequency conversion circuit, and the operating frequency band of the output is from low frequency to 100M
Hz is secured. The high-frequency SW229 is the receiving first IF circuit 2
28 is output to the baseband filter 231 or the second I
Select one of the F filters 232 and connect.

The baseband filters 230 and 231 are low-pass filters whose cutoff frequencies are in the low frequency range (150 KHz to 2.5 MHz), and operate as channel filters after quadrature demodulation. The reception second IF filter 232 is generally composed of a SAW filter, and has a pass band center frequency of 100 MHz. The reception second IF circuit 233 is a demodulation circuit having an operation frequency of 100 MHz.

The operation of the receiving circuit in the wireless device configured as described above will be described. At the time of FDD mode reception, the received signal 216 of frequency 1800 MHz
In 201, the signal is converted into a reception IF signal 217 of 300 MHz, and is input to the reception first IF circuit 228 via the reception first IF filter 227. The reception first IF circuit 228 includes a 400 MHz local oscillation signal input from the second local oscillation unit 212 and a 300 MHz reception IF signal.
A signal having a frequency difference (100 MHz) from 217 is output as a received second IF signal. At this time, the image interference frequency (500 MHz) is blocked by the reception IFLPF227.

In the FDD mode, the high-frequency SW 229 selects the reception second IF filter 232 side. The reception second IF signal passes through the reception second IF filter 232 and is input to the reception second IF circuit 233 to be demodulated. You.

On the other hand, at the time of TDD mode reception, frequency 1900M
Hz received signal 216 is 400M
The signal is converted into a reception IF signal 217 in Hz, and is quadrature-demodulated in a reception first IF circuit 228 via a reception IFLPF 227 using a local oscillation signal of 400 MHz. In TDD mode, high-frequency SW229
Has selected the baseband filter 231 side, and the quadrature demodulated IQ baseband signal is
In 230 and 231, the band is limited and output to the baseband signal processing unit.

Therefore, it is possible to cope with both the FDD and TDD modes without providing two systems of the first local oscillator and the second local oscillator.

As described above, in the seventeenth embodiment, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system is used by commonly using one first local oscillation unit and one second local oscillation unit. It can be realized with a simple configuration.

(Eighteenth Embodiment) A wireless device according to an eighteenth embodiment has a local oscillation filter as shown in FIG.
234 and 235, and the point that the level switching circuit 236 is provided,
It differs from the configuration of the wireless device of each embodiment of FIGS. 15 and 16. In FIG. 18, components denoted by the same reference numerals as those in FIGS. 15 and 16 perform the same operations.

In the following, for convenience, the transmission frequency in the FDD mode is set to 1
It is assumed that 900 MHz, the reception frequency in the FDD mode is 1700 MHz, the transmission / reception frequency in the TDD mode is 1900 MHz, the transmission IF frequency in the FDD mode and the IF frequency in the TDD mode are 400 MHz, and the reception IF frequency in the FDD mode is 200 MHz.

The local oscillation filters 234 and 235 are band-pass filters having a pass band center frequency of 1500 MHz. The main stop frequencies are set to the transmission / reception frequency (1700 MHz to 1900 MHz) and the IF frequency (200 MHz to 400 MHz). Level switching circuit 23
Reference numeral 6 includes a high-frequency attenuation circuit and a switching circuit, and functions to increase or decrease the level of the first local oscillation signal according to the mode control signal.

In the radio apparatus configured as described above, at the time of reception in the FDD mode, the high-frequency SW 204 selects the reception IF filter 209 side, and the reception signal is received by the reception IF filter 2.
The signal is orthogonally demodulated by the reception IF circuit 210 via the signal 09. During TDD mode reception, the high-frequency SW 204 selects the reception IF filter 225 side, and the reception signal is received by the reception IF filter 2.
The signal is quadrature-demodulated in the reception IF circuit 226 via the signal 25. The operations of the 2 divider 221, the 4 divider 222, the 2 divider 223, and the second local oscillator 224 perform the same operations as in FIG.

Further, the local oscillation filters 234 and 235
The stop frequency is determined by the transmission / reception frequency (1700MHz to 1900MHz) and IF
Since the frequency is set to 200 MHz to 400 MHz, isolation between the up converter 200 and the down converter 201 can be ensured. Further, the up-converter 200 receives the mode control signal 237 and switches to an operation in which, for example, in the FDD mode, emphasis is placed on intermodulation characteristics. Also, the level switching circuit 236 is controlled by the mode control signal 237, operates to set the local oscillation signal level optimal for each of the FDD and TDD modes, and to optimize the operation of the up converter 200 and the down converter 201.

As described above, in the eighteenth embodiment, the FDD
And a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system, which can ensure the optimum performance in both the TDD mode and the TDD mode.

(Nineteenth Embodiment) As shown in FIG. 19, the radio equipment of the nineteenth embodiment comprises a two-frequency divider 238,
Although it includes a frequency-divided-by-2 digital phase shifter 239 and mixers 240 and 241, the configuration is basically the same as that of the wireless device of the fifteenth embodiment in FIG. In FIG. 19, components denoted by the same reference numerals as those in FIG. 15 perform the same operations.

FIG. 19 shows the details of the inside of the transmission IF circuit 208 and the 4-frequency divider 222 in the radio apparatus according to the fifteenth embodiment of FIG. The transmission IF circuit 208 is
A quadrature modulator is formed by 40 and 241. The local oscillation signals 242 and 243 input to each mixer need to have a phase difference of 90 degrees from each other.

As a circuit for generating signals having a phase difference of 90 degrees, a phase shift circuit using a resistor and a capacitor is generally used. The 4 frequency divider 222 is composed of a 2 frequency divider 238 and a 2 frequency-divided digital phase shifter 239, divides the frequency of the 800 MHz local oscillation signal output from the local oscillator 224 by 4, and has a 90 degree phase shifter. Output two different signals.

As described above, in the nineteenth embodiment, by including the divide-by-2 digital phase shift circuit in the frequency dividing function of the divide-by-4 frequency divider 222, simultaneous transmission / reception FDD can be performed in a configuration that does not require a special phase shift circuit. And a dual mode wireless device compatible with the TDD system.

(Twentieth Embodiment) FIG. 20 is a block diagram showing a schematic configuration of a radio apparatus according to a twentieth embodiment of the present invention. A radio apparatus 300 shown in FIG. 20 includes a voltage controlled oscillator (VCO) 302 that outputs a first local oscillation signal 311 and a second local oscillation signal 312 obtained by dividing the first local oscillation signal 311 by 1 / N. A first frequency divider 305 for outputting, and the first frequency divider 30
A second frequency divider 306 that divides the output of 5 by 1 / L and outputs a comparison frequency signal 309, and a phase comparator 304 that receives the comparison frequency signal 309 and the reference frequency signal 308 and performs phase comparison
The output of the phase comparator 304 is filtered and the VCO control voltage 31
A low-pass filter (LPF) 303 that outputs 0 to the VCO 302
Dividing the first local oscillation signal 311 by 1 / M,
A third frequency divider 307 that outputs a local oscillation signal 313;
A transmission or reception circuit 301 for inputting the local oscillation signal 312 and the third local oscillation signal 313 is provided.

Voltage Controlled Oscillator (VCO) 302 and First Divider 30
5, a second frequency divider 306, a phase comparator 304, and a low-pass filter (LPF) 303 constitute a loop of the PLL synthesizer. The symbols L, M, and N are integer values.

According to the radio apparatus having the above configuration, the output 3 of the VCO 302 is output from the first frequency divider 305 in the loop of the PLL synthesizer.
The second local oscillation signal 312 obtained by dividing 11 by 1 / N and the output 311 of the VCO 302 from the third frequency divider 307 provided outside the loop
A third local oscillation signal 313 divided to / M can be obtained.

Therefore, according to the radio apparatus of the twentieth embodiment, the output 311 of the VCO 3302 can be divided by 1 / N and 1 / M by providing one frequency divider outside the loop of the PLL synthesizer. To obtain two divided signals.

That is, according to the radio apparatus of the twentieth embodiment, a plurality of frequency signals can be generated while realizing a reduction in circuit size and a reduction in power consumption.

In the case where the first local oscillation signal 311 is one of a plurality of frequency signals as a configuration in which the third frequency divider 307 is not used, it is possible to further contribute to downsizing of the circuit scale and reduction of power consumption. Can be.

(Twenty-First Embodiment) FIG. 21 is a block diagram showing a schematic configuration of a wireless device according to a twenty-first embodiment of the present invention. The same components as those of the wireless device 300 shown in FIG. 20 are denoted by the same reference numerals, and the configurations and operations are omitted.

The wireless device shown in FIG. 21 is different from the wireless device shown in FIG. 20 in that the wireless device shown in FIG.
A fourth frequency divider 314 for dividing the output of the frequency divider 305 by 1 / K is provided. The output of the fourth frequency divider 314 is input to the second frequency divider 306 and output as the fourth local oscillation signal 315. Configuration. The aforementioned symbol K is an integer value.

According to the radio apparatus having the above configuration, the output 3 of the VCO 302 is output from the first frequency divider 305 in the loop of the PLL synthesizer.
The same PLL as the second local oscillation signal 312 obtained by dividing 11 by 1 / N
From the fourth divider 314 in the synthesizer loop, the VCO 302
A fourth local oscillation signal 315 obtained by dividing the output 311 by 1 / (N × K) can be obtained.

Thus, according to the radio apparatus of the twenty-first embodiment, the output 311 of the VCO 302 can be changed to 1 / N and 1 / (N × K) without providing a frequency divider outside the loop of the PLL synthesizer.
Thus, two signals divided by different division numbers can be obtained.

That is, according to the radio apparatus of the twenty-first embodiment, it is possible to generate a plurality of frequency signals while realizing a reduction in circuit size and a reduction in power consumption.

(22nd Embodiment) FIG. 22 is a block diagram showing a schematic configuration of a radio apparatus according to a 22nd embodiment of the present invention. 20 and 21 are denoted by the same reference numerals, and the configuration and operation are omitted.

The wireless device shown in FIG. 22 is different from the wireless device shown in FIG. 21 in that the wireless device shown in FIG.
The frequency mixer 316 is a means for mixing the local oscillation signal 312 and the fourth local oscillation signal 315, and the output of the frequency mixer 316 is output as the fifth local oscillation signal 317.

The frequency mixer 316 outputs the output 311 of the VCO 302 to 1
/ N divided by 2 and the output 3 of the VCO 302
A fourth local oscillation signal 315 obtained by dividing 11 into 1 / (N × K) is mixed, and (1 + K) / (N + K) of the output 311 of the VCO 302 is mixed.
And outputs a fifth local oscillation signal 317.

Therefore, according to the radio apparatus having the above configuration, VC
The second local oscillation signal 312 obtained by dividing the output 311 of O302 by 1 / N
Then, the fifth local oscillation signal 317 that is (1 + K) / (N + K) of the output 311 of the VCO 302 can be obtained.

Therefore, according to the radio apparatus of the twenty-second embodiment, the output 311 of the VCO 3302 is set to 1 / N (1N) without providing a frequency divider or a multiplier outside the loop of the PLL synthesizer.
(+ K) / (N + K).

That is, according to the radio apparatus of the twenty-second embodiment, it is possible to generate a plurality of frequency signals while realizing a reduction in circuit size and a reduction in power consumption.

(Twenty-third Embodiment) A wireless device according to a twenty-third embodiment has a transmission output detection circuit as shown in FIG.
400, a gain control amplifier 401, resistors 402 and 405, capacitors 403 and 406, and SW404 and 407,
This is different from the configuration of the wireless device of the first embodiment in FIG. In FIG. 23, components denoted by the same reference numerals as those in FIG. 1 perform the same operations.

The radio apparatus shown in FIG. 23 shows an example in which the radio apparatus of FIG. 1 switches the time response characteristics of various control signals in conjunction with switching between the FDD and TDD modes. The transmission output detection circuit 400 detects the output of the power amplifier 108 and outputs a detection signal 409 converted to DC. Resistance 402
And the capacitor 403 smoothes the detection signal 409 and outputs the detection signal 41
This is a time constant circuit that outputs to the control unit as 0, and the time constant is switched by the mode control signal 408 using the SW 404.

The gain control amplifier 401 is an amplifier whose gain can be changed by the gain control signal 411. The gain control signal 412 output from the control unit is smoothed by a time constant circuit including the resistor 405 and the capacitor 406, and becomes a gain control signal 411. Resistor 405 and capacitor
The time constant of the time constant circuit configured by 406 is switched by the mode control signal 408 using the SW 407.

In the radio device configured as described above, mode control signal 408 is a signal for setting either the FDD or TDD mode, and the operation of the entire radio device is switched by this signal. In addition, the control unit monitors the transmission output by constantly monitoring the detection signal 410, and controls the gain control signal 412 so that a constant transmission output is always obtained.
Control.

In the FDD mode, the transmission operation is temporally continuous, and the detection signal 410 and the gain control signal 412
Does not require a fast response. Conversely, in TDD mode, the transmission operation is performed at fixed time intervals (for example, every 2.5 mSec)
, The detection signal 410 and the gain control signal 412 are required to have a high-speed response. Therefore, in the present embodiment, the mode control signal 408 causes the SW 404
And 407 are switched to switch the time constant of each time constant circuit.

Note that the time constant circuit and the time constant switching means
The present invention is not limited to the above example, and the essential effect of the present invention can be obtained as long as the time constant is switched by another method.

As described above, in the twenty-third embodiment, the FDD
And a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system, which can ensure the optimum performance in both the TDD mode and the TDD mode.

(Twenty-fourth Embodiment) As shown in FIG. 24, the radio equipment according to the twenty-fourth embodiment has a VCO 413, a variable frequency divider 414, a phase comparator 415, an LPF 416, and a reference frequency divider. Table 41
7 and a reference oscillator 418.
This is the same as the configuration of the wireless device according to the fifteenth embodiment. In FIG. 24, components denoted by the same reference numerals as those in FIG. 15 perform the same operations.

The wireless device shown in FIG.
In the wireless device according to the embodiment, the operation of the first local oscillator 203 is switched in conjunction with the switching between the FDD and TDD modes. The first local oscillation unit 203 has V
The PLL synthesizer includes the CO 413, the variable frequency divider 414, the phase comparator 415, the LPF 416, the reference frequency divider 417, and the reference oscillator 418.

By the operation of the PLL synthesizer, the oscillation frequency of the VCO 413 is changed according to the set frequency of the variable frequency divider 414.
The frequency is locked to the frequency based on the reference oscillator 418. Here, in the PLL synthesizer, generally, the speed-up of the lock-up time and the reduction of the steady low phase noise of the output signal are contradictory characteristics.

For example, if the bandwidth of the LPF 416 is reduced, the low phase noise is reduced, but the lock-up time becomes longer. Further, if the comparison frequency in the phase comparator 415 is increased, the lock-up time can be shortened, but the low phase noise tends to deteriorate.

Also, in the FDD mode, since the transmission and reception operations are temporally continuous, it is not required to shorten the lock-up time, but it is necessary to reduce low phase noise due to the regulations required by the system. There are many. On the other hand, in the TDD mode, the transmission operation is performed at a high speed at regular time intervals (for example, every 2.5 mSec).

In this embodiment, the mode control signal 408 is input to the variable frequency divider 414, the LPF 416, and the reference frequency divider 417 in view of the above-described background, and interlocked with switching between both the FDD and TDD modes. , The characteristics of each block are switched so as to be optimal for each mode. In such a case, the loop gain of the PLL synthesizer of the local oscillation unit is switched in conjunction with the switching of both the FDD and TDD modes,
In addition, the comparison frequency of the PLL synthesizer may be switched in accordance with the switching of both the FDD and TDD modes, or the loop filter band of the PLL synthesizer may be switched in conjunction with the switching of both the FDD and TDD modes. It is configured to switch the width.

As described above, in the twenty-fourth embodiment, the FDD
And a dual mode wireless device compatible with the simultaneous transmission / reception FDD system and the TDD system, which can ensure the optimum performance in both the TDD mode and the TDD mode.

[0297]

As is apparent from the above description, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a simple configuration.

Further, it is possible to realize a simultaneous transmission / reception FDD system and TDD system dual mode radio apparatus compatible with diversity reception in the FDD mode with a simple configuration.

Further, it is possible to realize a simultaneous transmission / reception FDD system and TDD system dual mode radio apparatus compatible with diversity reception in both FDD and TDD modes with a simple configuration.

Also, by using one first local oscillator in common, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and TDD system can be realized with a simple configuration.

Further, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD system and the TDD system can be realized with a configuration in which the number of local oscillation units is minimized.

Also, by using one first local oscillation section and one second local oscillation section in common, a dual mode radio apparatus compatible with the simultaneous transmission / reception FDD scheme and TDD scheme can be realized with a simple configuration. .

Further, a simultaneous transmission / reception FDD system and a TDD system capable of securing optimum performance in both the FDD mode and the TDD mode.
It is possible to realize a dual mode wireless device compatible with the system with a simple configuration.

Also, by including the divide-by-2 digital phase shift circuit in the frequency dividing function of the divide-by-4 frequency divider, a dual mode radio compatible with the simultaneous transmission / reception FDD system and TDD system can be realized without a special phase shift circuit. The device can be realized.

Further, it is possible to generate a plurality of frequency signals while realizing miniaturization of the circuit scale and reduction of power consumption.

Also, it is possible to generate a plurality of frequency signals while minimizing the number of frequency dividers used in the radio apparatus and realizing miniaturization of the circuit scale and reduction of power consumption.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a wireless device according to a first embodiment of the present invention;

FIG. 2 is a configuration diagram illustrating a wireless device according to a second embodiment of the present invention;

FIG. 3 is a configuration diagram illustrating a wireless device according to a third embodiment of the present invention;

FIG. 4 is a configuration diagram illustrating a wireless device according to a fourth embodiment of the present invention;

FIG. 5 is a configuration diagram showing a wireless device according to a fifth embodiment of the present invention;

FIG. 6 is a configuration diagram illustrating a wireless device according to a sixth embodiment of the present invention;

FIG. 7 is a configuration diagram showing a wireless device according to a seventh embodiment of the present invention;

FIG. 8 is a configuration diagram illustrating a wireless device according to an eighth embodiment of the present invention;

FIG. 9 is a configuration diagram showing a wireless device according to a ninth embodiment of the present invention;

FIG. 10 is a configuration diagram showing a wireless device according to a tenth embodiment of the present invention;

FIG. 11 is a configuration diagram showing a wireless device according to an eleventh embodiment of the present invention;

FIG. 12 is a configuration diagram showing a wireless device according to a twelfth embodiment of the present invention;

FIG. 13 is a configuration diagram showing a wireless device according to a thirteenth embodiment of the present invention;

FIG. 14 is a configuration diagram illustrating a wireless device according to a fourteenth embodiment of the present invention;

FIG. 15 is a configuration diagram showing a wireless device according to a fifteenth embodiment of the present invention;

FIG. 16 is a configuration diagram showing a wireless device according to a sixteenth embodiment of the present invention;

FIG. 17 is a configuration diagram showing a wireless device according to a seventeenth embodiment of the present invention;

FIG. 18 is a configuration diagram illustrating a wireless device according to an eighteenth embodiment of the present invention;

FIG. 19 is a configuration diagram showing a wireless device according to a nineteenth embodiment of the present invention;

FIG. 20 is a configuration diagram illustrating a wireless device according to a twentieth embodiment of the present invention;

FIG. 21 is a configuration diagram showing a wireless device according to a twenty-first embodiment of the present invention;

FIG. 22 is a configuration diagram showing a wireless device according to a twenty-second embodiment of the present invention;

FIG. 23 is a configuration diagram showing a wireless device according to a twenty-third embodiment of the present invention;

FIG. 24 is a configuration diagram illustrating a wireless device according to a twenty-fourth embodiment of the present invention.

[Explanation of symbols]

 100, 121 Antenna duplexer 101 First antenna 102, 106, 115, 125, 129 High frequency SW 133, 204, 218, 220, 229 High frequency SW 103, 104, 116 Low noise amplifier 105, 118 Reception filter 107 Reception circuit 108, 127, 128, 134 Power amplifier 109, 130 Transmitting circuit 117 Second antenna 119, 135 First receiving circuit 120, 136 Second receiving circuit 122 Shared terminal 126 Transmission filter 200 Up converter 201 Down converter 202, 211, 223 Two divider 203 First local oscillator 205, 206 Transmit IF filter 207, 208, 219 Transmit IF circuit 209, 225 Receive IF filter 210, 226 Receive IF circuit 212 Second local oscillator 213 Third local oscillator 221, 238 Divided by 2 Unit 222 Fourth divider 224 Second local oscillator 227 Receive IFPF 228 Receive first IF circuit 230, 231 Baseband filter 232 Receive second IF filter 233 Receive second IF circuit 234, 235 Local oscillation filter 236 Level switching circuit 239 Divide-by-2 digital Phase shifter 240, 241 Miki C 300 Radio equipment 302, 413 Voltage controlled oscillator (VCO) 303, 416 Low pass filter (LPF) 304, 415 Phase comparator 305 First frequency divider 306 Second frequency divider 307 Third frequency divider 314 Fourth Frequency divider 316 Frequency mixer 400 Transmission output detection circuit 401 Gain control amplifier 402, 405 Resistor 403, 406 Capacitor 407, 407 SW 414 Variable frequency divider 417 Reference frequency divider 418 Reference oscillator

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Hiroyuki Shioya 2-1-1, Hikosancho, Kanazawa-shi, Ishikawa F-term in Matsushita Communication Kanazawa Research Laboratories Co., Ltd. 5K011 BA00 BA02 DA02 DA03 DA06 DA11 DA15 DA21 DA27 EA03 FA01 GA04 JA01 KA01 5K046 AA05 BA01 CC02 DD15 DD22

Claims (66)

[Claims] 1. A dual mode wireless device compatible with the FDD system and the TDD system, wherein an operation of a transmission / reception circuit is switched so as to perform simultaneous transmission / reception in the FDD mode. 2. An FDD which performs a TDD system and a simultaneous transmission / reception operation.
In a dual-mode wireless device corresponding to the system, an antenna duplexer, a high-frequency SW is provided between the antenna duplexer and the antenna, and performs a transmission / reception operation using the antenna duplexer in the FDD mode, and the high-frequency switch in the TDD mode. A wireless device for performing transmission and reception switching using a SW. 3. The high frequency switch according to claim 1, wherein a first output of the high frequency switch is connected to the antenna duplexer, and a second output of the high frequency switch is connected to a receiving circuit provided for the TDD mode. 2. The wireless device according to 2. 4. An FDD is applied to a receiving side output of the antenna duplexer.
A mode receiving circuit is connected, a transmitting circuit is connected to a transmitting side input of the antenna duplexer, and a receiving filter having a TDD mode pass band frequency is connected to a second output of the high frequency SW. The wireless device according to claim 2 or 3, wherein 5. An FDD is applied to a receiving-side output of the antenna duplexer.
A low-noise amplifier for the TDD mode is connected to a low-noise amplifier for the TDD mode, and a low-noise amplifier for the TDD mode is connected to the subsequent stage of the reception filter having a pass band frequency of the TDD mode. 5. The radio apparatus according to claim 2, wherein an output of the low noise amplifier is selected and connected to a receiving circuit. 6. An FDD which performs a TDD system and a simultaneous transmission / reception operation.
In a dual-mode wireless device corresponding to the system, an antenna duplexer, a high-frequency SW is provided between a transmission side input and a transmission circuit of the antenna duplexer, and performs a transmission / reception operation using the antenna duplexer in the FDD mode. A wireless device that switches transmission and reception using the high-frequency SW in the TDD mode. 7. The high frequency switch according to claim 6, wherein a first output of the high frequency switch is connected to a transmission circuit, and a second output of the high frequency switch is connected to a reception circuit provided for the TDD mode. Wireless device. 8. An FDD is applied to a receiving side output of the antenna duplexer.
A low-noise amplifier for mode is connected, and the second
A low-noise amplifier for TDD mode is connected to the output, and the low-noise amplifier for FDD mode and the output of the low-noise amplifier for TDD mode are selected and connected to a receiving circuit. The wireless device according to claim 7. 9. The radio apparatus according to claim 5, wherein a power supply of a low-noise amplifier not used in the current mode is turned off in conjunction with switching between the FDD mode and the TDD mode. . 10. The low noise amplifier for FDD mode is G
6. A low-noise amplifier using an aAs-FET, wherein the low-noise amplifier for the TDD mode is formed by a low-noise amplifier using a bipolar transistor.
Or the wireless device according to claim 8. 11. The radio apparatus according to claim 5, wherein the low noise amplifier for the TDD mode includes an input matching circuit for matching a noise figure minimum impedance of an amplification element. 12. The reception-side output of the antenna duplexer and TD
The output of the reception filter having a pass band frequency of D mode is selected by a second high frequency switch, and input to a low noise amplifier shared by both FDD and TDD modes. 5. The wireless device according to 4. 13. A second high-frequency SW, which selects one of a reception-side output of the antenna duplexer and a second output of the high-frequency SW, and inputs the same to a low-noise amplifier shared by both FDD and TDD modes. The wireless device according to claim 8, wherein: 14. A radio apparatus for performing a diversity reception operation in an FDD mode, wherein a first reception circuit for the FDD mode is connected to a reception side output of the antenna duplexer,
A first input of a second high-frequency SW connected to an output of the reception filter having a pass band frequency of a mode, a reception filter having a pass band frequency of an FDD mode at a second input of the second high-frequency SW; The receiving circuit connected to a second antenna and connected to an output of the second high-frequency SW operates as a second receiving circuit for FDD mode or a receiving circuit for TDD mode. The wireless device according to claim 4. 15. A second antenna duplexer, wherein a second output of a first high-frequency SW is connected to a TDD mode band side input of the second antenna duplexer, and an FDD of the second antenna duplexer is provided. The wireless device according to claim 14, wherein a second antenna is connected to the mode band side input. 16. A radio apparatus for performing a diversity reception operation in an FDD mode, comprising: a second antenna;
Said receive filter having a mode passband frequency;
A second high-frequency switch for connecting and disconnecting the reception filter and a second output of the high-frequency switch, wherein a reception circuit for TDD mode is shared as a second reception circuit for FDD mode. The wireless device according to any one of claims 6 to 8. 17. The radio apparatus according to claim 3, wherein the bias condition of the power amplifier of the transmission unit is switched in conjunction with switching between the FDD mode and the TDD mode. 18. A first output of the high-frequency switch is connected to a transmission circuit provided for a TDD mode,
The wireless device according to claim 2, wherein a second output of the wireless communication device is connected to the antenna duplexer. 19. A receiving circuit is connected to a receiving-side output of the antenna sharing device, and a FD is connected to a transmitting-side input of the antenna sharing device.
19. The radio apparatus according to claim 18, wherein a transmission circuit for D mode is connected, and a transmission filter having a pass band frequency of TDD mode is connected to a second output of the high frequency switch. 20. An FD input to a transmission side input of the antenna duplexer.
A power amplifier for D mode is connected, a power amplifier for TDD mode is connected after the transmission filter having a pass band frequency of TDD mode, a power amplifier for FDD mode and a power amplifier for TDD mode. 20. The wireless device according to claim 18, wherein an input of the wireless device is selected and connected to a transmission circuit. 21. An F which performs a TDD system and a simultaneous transmission / reception operation
In a dual mode wireless device corresponding to the DD system, an antenna duplexer, a high-frequency SW is provided between a reception side output of the antenna duplexer and a receiving circuit, and performs a transmission / reception operation using the antenna duplexer in the FDD mode. A wireless device that switches between transmission and reception using the high-frequency SW in the TDD mode. 22. The high frequency switch according to claim 21, wherein a first output of the high frequency switch is connected to a receiving circuit, and a second output of the high frequency switch is connected to a transmitting circuit provided for the TDD mode. Wireless device. 23. An FD input to a transmission-side input of the antenna duplexer.
A power amplifier for D mode is connected, and the second
The power amplifier for the TDD mode is connected to the output, and the input of the power amplifier for the FDD mode and the input of the power amplifier for the TDD mode are selected and connected to the transmission circuit. A wireless device as described. 24. The radio apparatus according to claim 20, wherein the power of a power amplifier not used in the current mode is turned off in conjunction with switching between the FDD mode and the TDD mode. 25. A power amplifier for FDD mode, comprising:
24. The wireless device according to claim 20, wherein the wireless device is configured by a power amplifier circuit using an s-FET, and the power amplifier for the TDD mode is configured by a power amplifier circuit using a bipolar transistor. 26. The power amplifier for the FDD mode, wherein the saturation output point of the amplifier circuit is set high, and the power amplifier operates linearly at the time of maximum power transmission.
24. The wireless device according to claim 23. 27. The transmission-side input of the antenna duplexer and TD
20. An input of the transmission filter having a pass band frequency of the D mode, which is selected by a second high frequency switch, and connected to a power amplifier shared by both the TDD mode and the FDD mode. A wireless device as described. 28. Any of a transmission-side input of the antenna duplexer and a second output of the high-frequency switch is selected by a second high-frequency switch and connected to a power amplifier shared in both TDD and FDD modes. The wireless device according to claim 23, wherein: 29. A radio apparatus for performing a diversity reception operation, wherein a reception filter is connected to the second antenna, and a second reception circuit shared in both FDD and TDD modes is connected to the reception filter. The wireless device according to claim 18, claim 19, or claim 22. 30. The radio apparatus according to claim 18, wherein the bias condition of the power amplifier of the receiving unit is switched in conjunction with switching between the FDD mode and the TDD mode. 31. An F which performs a TDD system and a simultaneous transmission / reception operation
In a dual mode wireless device compatible with the DD system, an up converter, a down converter, a first local oscillator, a two divider, a transmission intermediate frequency circuit for FDD mode, and a transmission intermediate frequency circuit for TDD mode And switching means for selecting the outputs of the two transmission intermediate frequency circuits and inputting them to the up-converter, and by setting the frequencies of the two transmission intermediate frequency circuits differently, FDD and TDD.
Wherein the frequency of the first local oscillator is the same in both modes. 32. A transmission intermediate frequency circuit for the FDD mode, comprising: a first quadrature modulator; and an IF filter corresponding to a transmission intermediate frequency in the FDD mode. 2 quadrature modulator and TDD
The wireless device according to claim 31, further comprising an IF filter corresponding to a transmission intermediate frequency in a mode. 33. A signal processing apparatus comprising: a second local oscillation section; and a third local oscillation section, wherein an output of the second local oscillation section is distributed to the second quadrature modulator and a reception intermediate frequency circuit. 33. The wireless device according to claim 32, wherein an output of the local oscillation unit is input to the first quadrature modulator. 34. In the transmission intermediate frequency circuit, a single quadrature modulator is shared in both FDD and TDD modes, and an IF filter corresponding to the transmission intermediate frequency in the FDD mode and a transmission intermediate frequency in the TDD mode. 34. The wireless device according to claim 32, wherein the used IF filter is switched and used. 35. A high-frequency switch is connected to a local oscillation input of the quadrature modulator, and an output of the second local oscillation section or an output of the third local oscillation section is selected and input to the quadrature modulator. 35. The wireless device according to claim 34, wherein: 36. The apparatus further comprising: a second local oscillator, a first frequency divider, and a second frequency divider, wherein an output of the first frequency divider is input to the first quadrature modulator. 34. The radio apparatus according to claim 32, wherein an output of the second frequency divider is input to the second quadrature modulator. 37. The apparatus according to claim 37, further comprising: a second local oscillator, a first multiplier, and a second multiplier. An output of the first multiplier is input to the first quadrature modulator. 34. The radio apparatus according to claim 32, wherein an output of the second multiplier is input to the second quadrature modulator. 38. An F which performs a TDD system and a simultaneous transmission / reception operation
A dual mode wireless device compatible with the DD system, comprising an up-converter, a down-converter, a first local oscillator, a two divider, a transmission intermediate frequency circuit, and a second local oscillator, and in a TDD mode. By operating the transmission intermediate frequency circuit as a quadrature modulator in the FDD mode and operating the transmission intermediate frequency circuit as a frequency conversion section, the first in both the FDD and TDD modes
A local oscillation unit and a second local oscillation unit having the same frequency. 39. An F which performs a TDD system and a simultaneous transmission / reception operation
In a dual mode wireless device compatible with the DD system, an up converter, a down converter, a first local oscillator, a two divider, a reception intermediate frequency circuit for an FDD mode, and a reception intermediate frequency circuit for a TDD mode Switching means for selecting and inputting the output of the down converter to either of the two receiving intermediate frequency circuits, and by setting the frequencies of the two receiving intermediate frequency circuits to be different, both the FDD and the TDD are provided. A wireless device in which a frequency of a first local oscillation unit is the same in a mode. 40. A receiving intermediate frequency circuit for the FDD mode, comprising: a first quadrature demodulator; and an IF filter corresponding to a receiving intermediate frequency in the FDD mode. 2 quadrature demodulator and TDD
The wireless device according to claim 39, further comprising an IF filter corresponding to a reception intermediate frequency in a mode. 41. A local oscillator, comprising: a second local oscillator, and a third local oscillator, wherein an output of the second local oscillator is distributed to the second quadrature demodulator and a transmission intermediate frequency circuit. 41. The radio apparatus according to claim 40, wherein an output of the third local oscillator is input to the first quadrature demodulator. 42. In the reception intermediate frequency circuit, a single quadrature demodulator is shared in both the FDD and TDD modes, and an IF filter corresponding to the reception intermediate frequency in the FDD mode and a reception intermediate frequency in the TDD mode. 42. The wireless device according to claim 40, wherein the used IF filter is switched and used. 43. A high-frequency switch is connected to a local oscillation input of the quadrature demodulator, and an output of the second local oscillation section or an output of the third local oscillation section is selected and input to the quadrature demodulator. 43. The wireless device according to claim 42, wherein: 44. The apparatus according to claim 44, further comprising: a second local oscillator, a first frequency divider, and a second frequency divider, wherein an output of the first frequency divider is input to the first quadrature demodulator. 42. The radio apparatus according to claim 40, wherein an output of the second frequency divider is input to the second quadrature demodulator. 45. The apparatus according to claim 45, further comprising: a second local oscillator, a first multiplier, and a second multiplier. An output of the first multiplier is input to the first quadrature demodulator. 42. The radio apparatus according to claim 40, wherein an output of the second multiplier is input to the second quadrature demodulator. 46. An F which performs a TDD system and a simultaneous transmission / reception operation
A dual mode wireless device compatible with the DD system, comprising an up converter, a down converter, a first local oscillator, a two divider, a receiving intermediate frequency circuit, and a second local oscillator, and in a TDD mode. By operating the reception intermediate frequency circuit as a quadrature demodulator in the FDD mode, and operating the reception intermediate frequency circuit as a frequency conversion unit in the FDD mode, the first in both the FDD and TDD modes
A local oscillation unit and a second local oscillation unit having the same frequency. 47. A local oscillation filter is inserted between a bi-divider for distributing an output of the first local oscillator and the up-converter and the down-converter, and a pass band of the filter is adjusted to a local oscillation frequency. And FDD stopband
47. The transmission / reception frequency and the intermediate frequency in the TDD mode and the TDD mode.
A wireless device as described. 48. The output unit of the first frequency divider and the second frequency divider has a 90-degree phase shift function, and the phases differ from the first frequency divider and the second frequency divider by 90 degrees. 45. The radio apparatus according to claim 36, wherein a local oscillation signal is output to the quadrature modulator or the quadrature demodulator. 49. The radio apparatus according to claim 31, wherein the bias condition of the up-converter or the down-converter is switched in conjunction with switching between the FDD mode and the TDD mode. 50. The wireless device according to claim 31, wherein the impedance of a matching circuit of an up-converter or a down-converter is switched in conjunction with switching between the FDD mode and the TDD mode. 51. The wireless communication apparatus according to claim 31, wherein the level of the first local oscillation signal input to the up-converter or the down-converter is switched in conjunction with switching between the FDD mode and the TDD mode. apparatus. 52. A wireless device using a plurality of local oscillation signals of different frequencies, wherein both the VCO output of the PLL synthesizer section and the frequency divider output in the loop of the PLL synthesizer are used as the local oscillation signal. Wireless device. 53. A VCO output of a PLL synthesizer section is input to an external divider, and both the output of the external divider and the output of a divider in a loop of the PLL synthesizer are used as a local oscillation signal. Wireless device. 54. At least two stages of frequency dividers in a loop of the PLL synthesizer and means for extracting an output of a frequency divider preceding the two stages of frequency dividers, and using the output as a local oscillation signal 54. The wireless device according to claim 52 or claim 53. 55. The PLL synthesizer according to claim 52, further comprising: a plurality of frequency dividers in the loop of the PLL synthesizer; and means for extracting a plurality of outputs having different frequency division numbers, wherein the outputs are used as local oscillation signals. 54. The wireless device according to claim 53. 56. The apparatus according to claim 53, further comprising means for mixing a plurality of outputs having different frequency division numbers, wherein an output of said mixing means is used as a local oscillation signal.
A wireless device as described. 57. The wireless device according to claim 31, wherein a plurality of local oscillation signals having different frequencies in the wireless device according to claim 52 are used. 58. An F which performs a TDD system and a simultaneous transmission / reception operation
In dual mode wireless devices that support the DD system, FD
A wireless device characterized by switching a time response characteristic of an AGC circuit that controls a gain of a transmission / reception circuit in conjunction with switching between a D mode and a TDD mode. 59. An F which performs a TDD system and a simultaneous transmission / reception operation
In dual mode wireless devices that support the DD system, FD
A wireless device that switches the rise or fall characteristics of a transmission / reception circuit in conjunction with switching between D and TDD modes. 60. The F which performs the TDD system and the simultaneous transmission / reception operation
In dual mode wireless devices that support the DD system, FD
A wireless device, wherein a time response characteristic of a transmission power detection circuit of a transmission circuit is switched in conjunction with switching between D and TDD modes. 61. An F which performs a TDD system and a simultaneous transmission / reception operation
In dual mode wireless devices that support the DD system, FD
A wireless device configured to switch a loop gain of a PLL synthesizer of a local oscillation unit in conjunction with switching between D and TDD modes. 62. The wireless device according to claim 61, wherein the comparison frequency of the PLL synthesizer is switched in conjunction with switching between the FDD and TDD modes. 63. The wireless apparatus according to claim 61, wherein the loop filter bandwidth of the PLL synthesizer is switched in conjunction with switching between the FDD and TDD modes. A wireless portable device comprising the wireless device according to any one of claims 1 to 63. 65. A wireless base station comprising the wireless device according to claim 1. Description: 66. A wireless communication system comprising the wireless portable device according to claim 64 and the wireless base station according to claim 65.