JP2003092539A - High frequency circuit, composite high frequency component and communication equipment for moving object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high frequency circuit, a composite high frequency component and communication equipment for moving object corresponding to first and second communication systems in which frequency bands to be used are proximate, and a third communication system in which a frequency band to be used is away from first and second systems. SOLUTION: A high frequency circuit 11 is provided with a diplexer part 20 for coupling transmitting signals in the case of transmitting, sending the resulting signal to an antenna ANT side, decoupling a received signal in the case of receiving and sending it to the communication system side. Besides, a first high frequency switch part 40 is provided for switching transmitting/ receiving of the first communication system and transmitting/receiving of the second communication system. Further, this circuit is provided with a second high frequency switch part 50 capable of switching transmitting and receiving of the second communication system and a third high frequency switch part 60 capable of switching transmitting and receiving of the third communication system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency circuit used in a communication device such as a mobile communication system, a composite high-frequency component realizing the same, and a mobile communication device using the same, and more particularly to a plurality of communication systems. The present invention relates to a high-frequency circuit corresponding to the above, a composite high-frequency component realizing the same, and a mobile communication device using the same.

[0002]

[Related Art] Currently, as a mobile communication device, DCS (D) using a plurality of high frequency bands, for example, 1.8 GHz band is used.
There is known a dual band mobile phone capable of operating in two communication systems, i.e., the cellular system (IGital Cellular System) and the GSM (Global System for Mobile communications) using the 900 MHz band. Furthermore, for example, PCS (Perso
In addition to other communication systems such as nalCommunication Services), triple band mobile phones that can operate with three communication systems have been proposed. For example, JP 2000
-165288 discloses a composite high frequency component and a mobile communication device capable of operating in three communication systems.

The present invention has been made in view of the above circumstances, and is a first communication system and a second communication system in which frequency bands to be used are close to each other, and frequencies to be used with these first and second communication systems. An object of the present invention is to provide a high frequency circuit corresponding to a third communication system whose bands are separated, a composite high frequency component realizing the same, and a mobile communication device including them.

[0004]

Means for Solving the Problems, Actions and Effects The means for solving the problems are a first communication system and a second communication system in which frequency bands to be used are close to each other, and these first and second communication systems.
It corresponds to a third communication system in which the frequency band used is separated from the communication system, combines the transmission signals from the transmitters of the first to third communication systems and sends them to the antenna side, and receives signals from the antenna side. A high-frequency circuit which is separately sent to a corresponding receiving unit of the first to third communication systems, and at the time of transmission, a transmission signal from the transmitting unit of the first or second communication system and the third communication system. Of the transmission signal from the transmitting section of the first communication system is transmitted to the antenna side, and at the time of reception, the reception signal from the antenna side is received by the receiving section side of the first and second communication systems and the third communication system. When using the first communication system and the diplexer unit which is separately sent to the receiving unit side, the transmission signal from the transmitting unit of the first communication system is sent to the diplexer unit or the diplexer unit is used. A reception signal from the transmission unit to the reception unit side of the first communication system, and when using the second communication system, the transmission signal from the transmission unit of the second communication system is transmitted to the diplexer unit, or A first high-frequency switch unit configured to be switchable between transmission and reception of the first communication system and transmission and reception of the second communication system so that a reception signal from the diplexer unit is sent to the reception unit side of the second communication system. When sending, the second
The transmission signal from the transmission unit of the communication system is sent to the first high frequency switch unit, and the reception signal from the first high frequency switch unit is sent to the reception unit side of the second communication system when receiving. A second high-frequency switch unit configured to switch between transmission and reception of the second communication system; and a transmission signal from the transmission unit of the third communication system to the diplexer unit for transmission and reception of the signal. And a third high-frequency switch unit configured to switch between transmission and reception of the third communication system so that a reception signal from the diplexer unit is sent to the reception unit side of the third communication system. It is a high frequency circuit.

Alternatively, the antenna corresponds to the first communication system and the second communication system in which the frequency bands to be used are close to each other, and the third communication system in which the frequency band to be used is separated from these first and second communication systems. An antenna terminal connected to the first communication system, a first transmission / reception input / output terminal connected to the transmission / reception unit of the first communication system, a second transmission input terminal connected to the transmission unit of the second communication system, and the second transmission / reception input terminal.
A second reception output terminal connected to the reception section of the communication system, a third transmission input terminal connected to the transmission section of the third communication system, and a third reception connected to the reception section of the third communication system. An output terminal, and outputs a transmission signal input to any of the first transmission / reception input / output terminal, the second transmission input terminal, and the third transmission input terminal to the antenna terminal, and inputs the transmission signal to the antenna terminal. A composite high frequency component for outputting the received signal to any of the first transmission / reception input / output terminal, the second reception output terminal and the third reception output terminal,
At the time of transmission, the transmission signal input to the first transmission / reception input / output terminal or the second transmission input terminal and the transmission signal input to the third transmission input terminal are combined and output to the antenna terminal for reception. In this case, the received signal input to the antenna terminal is sent separately to the first transmission / reception input / output terminal and the second reception output terminal side and the third reception output terminal side, and the first communication. When using the system, the transmission signal input to the first transmission / reception input / output terminal is sent to the diplexer unit, or the reception signal from the diplexer unit is output to the first transmission / reception input / output terminal, When using a two communication system, the transmission signal input to the second transmission input terminal is sent to the diplexer unit, or the reception signal from the diplexer unit is transmitted to the second reception output terminal. A first high-frequency switch unit configured to switch between transmission and reception of the first communication system and transmission and reception of the second communication system so as to output, and input to the second transmission input terminal when transmitting. The transmission and reception of the second communication system are performed so that a transmission signal is sent to the first high frequency switch section and the reception signal from the first high frequency switch section is output to the second reception output terminal when receiving. And a second high-frequency switch section configured to be switchable, and a transmission signal input to the third transmission input terminal when transmitting, to the diplexer section, and a reception signal from the diplexer section when receiving. Is output to the third reception output terminal, and a third high-frequency switch unit configured to be switchable between transmission and reception of the third communication system.

According to the former invention, the high frequency circuit includes a diplexer section, first, second and third high frequency switch sections. According to the latter invention, the composite high frequency component includes the diplexer unit and the first, second and third high frequency switch units. Therefore, in both inventions, when transmitting the transmission signal from the transmission unit of the first communication system, the transmission signal is
It can be sent to the antenna side through the first high-frequency switch unit and the diplexer unit. Further, when transmitting the transmission signal from the transmission unit of the second communication system, the transmission signal can be transmitted to the antenna side through the second high frequency switch unit, the first high frequency switch unit and the diplexer unit. Further, when transmitting the transmission signal from the transmission unit of the third communication system, the transmission signal can be transmitted to the antenna side through the third high frequency switch unit and the diplexer unit.

On the other hand, when the reception signal of the first communication system is received by the reception unit, the reception signal from the antenna side is sent to the reception unit of the first communication system through the diplexer unit and the first high frequency switch unit. can do. Further, when the reception signal of the second communication system is received by the reception unit, the reception signal from the antenna side is
It can be sent to the receiving unit of the second communication system through the diplexer unit, the first high frequency switch unit and the second high frequency switch unit. Further, when the reception signal of the third communication system is received by the reception unit, the reception signal from the antenna side can be sent to the reception unit of the third communication system through the diplexer unit and the third high frequency switch unit. it can. That is, these high-frequency circuits and composite high-frequency components can respectively correspond to the first communication system and the second communication system in which the used frequency bands are close to each other, and the third communication system in which the used frequency bands are apart from each other. it can.

Further, in the above high-frequency circuit, the first communication system is a CDMA communication system, and the diplexer unit and the transmitter and receiver of the first communication system have only circuit wiring or A high-frequency circuit connected only by circuit wiring and passive components is recommended.

Alternatively, in the above-mentioned composite high frequency component, the first communication system is a CDMA communication system, and the diplexer section and the first transmission / reception input / output terminal are circuit wiring only or circuit wiring. It is preferably a composite high-frequency component that is connected only by passive components.

The CDMA communication system has strict standards for adjacent channel distortion and the like. By the way, when a signal passes through an active switch component such as a diode, the signal is likely to be distorted due to the non-linearity of the characteristics. Therefore, the diplexer unit and the transmitter and receiver of the first communication system (or the first communication system)
If an active switch component such as a diode is interposed between the input / output terminal and the transmission / reception input / output terminal, the received signal or the transmitted signal may be distorted, and it may be difficult to conform to the standard.

On the other hand, in the former invention, when the first communication system is a CDMA communication system, the diplexer unit and the transmitting unit and the receiving unit of the first communication system are circuit wiring only or circuit wiring. It is connected only by passive components. In the latter invention, when the first communication system is a CDMA communication system, the diplexer unit and the first transmission / reception input / output terminal are:
Connected only by circuit wiring or only by circuit wiring and passive components. Therefore, the received signal and the transmitted signal are less likely to be distorted, and the standard of the CDMA communication system can be satisfied.

Further, in the high frequency circuit according to any one of the above, the first communication system is a communication system that is used more frequently than the second communication system, and the first high frequency switch section is When any of the active switch components included in is turned on, the transmission / reception of the second communication system is switched, and when any of the active switch components is turned off, the transmission / reception of the first communication system is switched. It is preferable that the high frequency circuit is configured to be capable of switching between transmission and reception of the first communication system and transmission and reception of the second communication system.

Alternatively, in the composite high frequency component as described in any one of the above, the first communication system may be the second
It is a communication system that is used more frequently than a communication system, and the first high-frequency switch section is configured to operate when any of the active switch components included in the first high-frequency switch section is turned on.
Switching between transmission / reception of the first communication system and transmission / reception of the second communication system so as to switch to transmission / reception of the first communication system when switching to transmission / reception of a communication system and turning off any of the active switch components It is preferable that the composite high-frequency component is configured to be possible.

As described above, the first high frequency switch section can switch between transmission and reception of the first communication system and transmission and reception of the second communication system. When one of the active switch components is turned on to switch the communication system, a current flows through the active component that is turned on during use of the communication system, which causes power consumption in the first high frequency switch section. Is relatively large. On the other hand, during use of the communication system that can be used when any of the active switch components is turned off, no current flows in the active switch components that are off, so that power consumption in the first high frequency switch unit is reduced. .

In both of the above inventions, the first communication system is a communication system that is used more frequently than the second communication system. Then, when one of the active switch components included in the first high-frequency switch unit is turned on, the second
When switching to transmission / reception of the communication system and turning off any of the active switch parts, switching to transmission / reception of the first communication system is performed. That is, when the second communication system that is used infrequently is used, power consumption is large, but when the first communication system that is used frequently is used, power consumption is reduced. Therefore, power consumption can be saved as a whole.

Another solution is a first communication system and a second communication system in which the frequency bands used are close to each other,
And a third communication system in which the frequency bands used for these first and second communication systems are distant from each other.
A high-frequency circuit that combines the transmission signals from the transmitters of the third communication system and sends them to the antenna side, separates the received signals from the antenna side, and sends them to the corresponding receivers of the first to third communication systems Therefore, at the time of transmission, the transmission signal from the transmission unit of the first or second communication system and the transmission signal from the transmission unit of the third communication system are combined and sent to the antenna side, and at the time of reception. When using the first communication system, a diplexer unit that separately transmits a reception signal from the antenna side to the reception unit side of the first and second communication systems and the reception unit side of the third communication system To send a transmission signal from the transmission unit of the first communication system to the diplexer unit, or send a reception signal from the diplexer unit to the reception unit side of the first communication system,
When transmitting using the second communication system, the transmission signal from the transmitting unit of the second communication system is sent to the diplexer unit, and when receiving using the second communication system, the diplexer unit is used. The received signal from the second
A fourth high-frequency switch unit configured to be switchable between transmission and reception of the first communication system, transmission of the second communication system, and reception of the second communication system so as to be transmitted to the reception unit side of the communication system, and transmission. In the case of, the transmission signal from the transmission unit of the third communication system is sent to the diplexer unit, and in the case of reception, the reception signal from the diplexer unit is sent to the reception unit side of the third communication system, And a third high-frequency switch unit configured to switch between transmission and reception of the third communication system.

Alternatively, the antenna corresponds to the first communication system and the second communication system whose frequency bands to be used are close to each other, and the third communication system whose frequency band to be used is distant from these first and second communication systems. An antenna terminal connected to the first communication system, a first transmission / reception input / output terminal connected to the transmission / reception unit of the first communication system, a second transmission input terminal connected to the transmission unit of the second communication system, and the second transmission / reception input terminal.
A second reception output terminal connected to the reception section of the communication system, a third transmission input terminal connected to the transmission section of the third communication system, and a third reception connected to the reception section of the third communication system. An output terminal, and outputs a transmission signal input to any of the first transmission / reception input / output terminal, the second transmission input terminal, and the third transmission input terminal to the antenna terminal, and inputs the transmission signal to the antenna terminal. A composite high frequency component for outputting the received signal to any of the first transmission / reception input / output terminal, the second reception output terminal and the third reception output terminal,
At the time of transmission, the transmission signal input to the first transmission / reception input / output terminal or the second transmission input terminal and the transmission signal input to the third transmission input terminal are combined and output to the antenna terminal for reception. In this case, the received signal input to the antenna terminal is sent separately to the first transmission / reception input / output terminal and the second reception output terminal side and the third reception output terminal side, and the first communication. When using the system, the transmission signal input to the first transmission / reception input / output terminal is sent to the diplexer unit, or the reception signal from the diplexer unit is output to the first transmission / reception input / output terminal, When transmitting using two communication systems, the second
When the transmission signal input to the transmission input terminal is output to the diplexer unit and is received using the second communication system, the reception signal from the diplexer unit is output to the second reception output terminal. A fourth high-frequency switch unit configured to switch between transmission and reception of the first communication system, transmission of the second communication system, and reception of the second communication system, and the third transmission input terminal when transmitting The transmission signal received by the third communication system is switched so that the transmission signal input to the diplexer unit is sent to the diplexer unit and the reception signal from the diplexer unit is output to the third reception output terminal when receiving. And a third high-frequency switch unit configured so as to be possible.

According to the former invention, the high frequency circuit includes a diplexer section and third and fourth high frequency switch sections. According to the latter invention, the composite high frequency component includes the diplexer unit and the third and fourth high frequency switch units. Therefore, in both inventions, when transmitting the transmission signal from the transmission unit of the first communication system, the transmission signal can be transmitted to the antenna side through the fourth high frequency switch unit and the diplexer unit. Further, when transmitting the transmission signal from the transmission unit of the second communication system, the transmission signal can be transmitted to the antenna side through the fourth high frequency switch unit and the diplexer unit. Further, when transmitting the transmission signal from the transmission unit of the third communication system, the transmission signal can be transmitted to the antenna side through the third high frequency switch unit and the diplexer unit.

On the other hand, when the reception signal of the first communication system is received by the reception section, the reception signal from the antenna side is sent to the reception section of the first communication system through the diplexer section and the fourth high frequency switch section. can do. Further, when the reception signal of the second communication system is received by the reception unit, the reception signal from the antenna side is
The second through the diplexer section and the fourth high frequency switch section
It can be sent to the receiving part of the communication system. Also,
When the reception signal of the third communication system is received by the reception unit, the reception signal from the antenna side can be sent to the reception unit of the third communication system through the diplexer unit and the third high frequency switch unit. That is, these high-frequency circuits and composite high-frequency components can respectively correspond to the first communication system and the second communication system in which the used frequency bands are close to each other, and the third communication system in which the used frequency bands are apart from each other. it can.

Further, in the above-mentioned high frequency circuit, the first communication system is a CDMA communication system, and the diplexer unit and the transmission unit and the reception unit of the first communication system are only circuit wiring or A high-frequency circuit connected only by circuit wiring and passive components is recommended.

Alternatively, in the above-mentioned composite high frequency component, the first communication system is a CDMA communication system, and the diplexer section and the first transmission / reception input / output terminal are circuit wiring only or circuit wiring. It is preferably a composite high-frequency component that is connected only by passive components.

As described above, when an active switch component such as a diode is interposed between the diplexer unit and the transmission unit and the reception unit (or the first transmission / reception input / output terminal) of the first communication system, the reception signal or the transmission signal is transmitted. Distortion occurs, which makes it difficult to comply with the standard such as the adjacent channel distortion of the CDMA system. On the other hand, in the former invention, when the first communication system is a CDMA communication system, the diplexer unit and the transmitter and receiver of the first communication system have only circuit wiring or only circuit wiring and passive components. Tied by. In the latter invention, the first
In the case where the communication system is a CDMA communication system, the diplexer unit and the first transmission / reception input / output terminal are connected by only circuit wiring or only circuit wiring and passive components. Therefore, the received signal and the transmitted signal are less likely to be distorted, and the standard of the CDMA communication system can be satisfied.

Further, in the high frequency circuit according to any one of the above, the first communication system is a communication system that is used more frequently than the second communication system, and the fourth high frequency switch section is When any of the active switch components included in the above is turned on, the transmission or reception of the second communication system is switched to, and when any of the active switch components is turned off, the transmission and reception of the first communication system is switched to. As described above, it is preferable that the high frequency circuit is configured to be capable of switching between transmission and reception of the first communication system, transmission of the second communication system, and reception of the second communication system.

Alternatively, in the composite high-frequency component according to any one of the above, the first communication system may include the second
It is a communication system that is used more frequently than a communication system, and the fourth high-frequency switch unit is configured to operate when any one of the active switch components included therein is turned on.
The transmission and reception of the first communication system and the transmission of the second communication system are switched so as to switch to the transmission and reception of the first communication system when switching to the transmission or reception of the communication system and turning off any of the active switch components. It is preferable that the composite high frequency component is configured to be switchable between reception and reception of the second communication system.

As described above, the fourth high frequency switch section can switch between transmission / reception of the first communication system, transmission of the second communication system and reception of the second communication system. When any one of the active switch components is turned on to switch the communication system, the active switch component current that is turned on flows during use of the communication system. Therefore, the power in the fourth high frequency switch section is increased. The consumption is relatively high. On the other hand, during use of the communication system that can be used when any of the active switch components is turned off, current does not flow to the active switch components that are off, so that power consumption in the fourth high frequency switch unit is reduced. .

In both of the above inventions, the first communication system is a communication system that is used more frequently than the second communication system. Then, when any of the active switch components included in the fourth high frequency switch section is turned on, the second
When switching to transmission or reception of the communication system and turning off any of the active switch components, switching to transmission and reception of the first communication system is performed. That is, the second less frequently used
When the communication system is used, the power consumption is high, but when the frequently used first communication system is used, the power consumption is low. Therefore, power consumption can be saved as a whole.

Further, mobile communication corresponding to the first communication system and the second communication system whose frequency bands to be used are close to each other, and the third communication system whose frequency band to be used is separated from these first and second communication systems. The device is preferably a mobile communication device including any one of the high frequency circuits described above.

Alternatively, mobile communication corresponding to the first communication system and the second communication system whose frequency bands to be used are close to each other, and the third communication system whose frequency band to be used is distant from these first and second communication systems. The device is preferably a mobile communication device using any one of the above-described composite high frequency components.

In the former invention, the mobile communication device includes any one of the above high frequency circuits. Further, in the latter invention, the mobile communication device includes any one of the composite high frequency circuits described above. Therefore, these mobile communication devices use the first communication system and the second communication system in which the frequency bands used are close to each other.
It is possible to support the communication system and the third communication system in which the frequency bands used for them are separated from each other.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) Hereinafter, embodiments of the present invention will be described with reference to the drawings. Embodiment 1
1 shows a mobile phone (mobile communication device) 91. This mobile phone 91 is a UMT whose frequency band used is close to each other.
S (Universal Mobile Telecommunications System) communication system (first communication system), DCS communication system (second communication system), and GSM communication system (third communication system) whose frequency bands used are separated from each other. It is a thing.

The mobile phone 91 has the composite high frequency component 1 shown in FIG. 2 mounted therein. In addition, a high frequency circuit 11 including the circuit formed in the composite high frequency component 1 is formed in the mobile phone 91 as shown in FIG. The composite high frequency component 1 includes a circuit element formed inside a ceramic multilayer substrate 2 having glass ceramic as an insulating layer and Ag as a conductive layer (not shown), a chip diode mounted on the main surface 2B, a chip resistor, The chip component 3 such as a chip capacitor constitutes a part of the high frequency circuit 11. The ceramic multilayer substrate 2 has a substantially rectangular parallelepiped shape, and the above-described chip component 3 is mounted on the main surface 2B thereof. In addition, the four side surfaces 2S1 and 2S2
In each of S2, 2S3 and 2S4, a plurality of castellations 4 each having a semi-cylindrical recess on the lower side in the drawing and an inner side surface of which is a conductor layer are formed. By this castellation 4, the composite high frequency component 1 can be mounted and connected on another substrate on the back surface 2C side. The castellation 4 corresponds to an antenna terminal, a transmission / reception input / output terminal, a transmission input terminal, a reception output terminal, a control terminal, a ground terminal, etc. in the high frequency circuit 11 described below.

The high frequency circuit 11 formed in the composite high frequency component 1 will be described with reference to FIG. The high frequency circuit 11 is divided into a plurality of functional blocks. That is, the diplexer unit 20, the first high frequency switch unit 40,
Second high frequency switch section 50, third high frequency switch section 6
0, a first low pass filter section 70 and a second low pass filter section 80. In addition, antennas ANT, UMTS
It includes a transceiver TXRX1 of the communication system, a transmitter TX2 and a receiver RX2 of the DCS communication system, and a transmitter TX3 and a receiver RX3 of the GSM communication system.

Among them, the diplexer unit 20 transmits the transmission signal from the transmission / reception unit TXRX1 of the UMTS communication system or the transmission unit TX2 of the DCS communication system and the transmission signal from the transmission unit TX3 of the GSM communication system during transmission. Are combined and sent to the antenna ANT side. On the other hand, at the time of reception, the reception signal from the antenna ANT side is separately sent to the transmission / reception unit TXRX1 of the UMTS communication system and the reception unit RX2 side of the DCS communication system and the reception unit RX3 side of the GSM communication system. Has been done. In other words, at the time of transmission, the transmission signal from the UMTS transmission / reception input / output terminal (first transmission / reception input / output terminal) TR1 or the DCS transmission input terminal (second transmission input terminal) T2 and the GSM transmission input terminal (third transmission) The transmission signal from the transmission input terminal T3 is combined and output to the antenna terminal TA. On the other hand, when receiving, the antenna terminal T
UMTS transmission / reception input / output terminal T for receiving signals input to A
The R1 and DCS reception output terminals R2 and the GSM reception output terminal R3 are separately sent.

Specifically, the diplexer section 20 includes a low-pass filter composed of capacitors 21, 22, 24 and 25 and coils 23 and 26, and capacitors 27, 28 and 2.
9 and a high-pass filter including a coil 30. More specifically, the low-pass filter is composed of two stages, of which the low-pass filter on the antenna terminal TA side has the capacitor 21 and the coil 23 connected in parallel, and is closer to the third high-frequency switch section 60 than this. The capacitor 22 is grounded. The low-pass filter on the side of the third high-frequency switch unit 60 also has a configuration in which the capacitor 24 and the coil 26 are connected in parallel and grounded by the capacitor 25 on the side of the third high-frequency switch unit 60. This two-stage low-pass filter is connected to the antenna terminal TA on the one hand and the third terminal on the other hand.
It is connected to the high frequency switch unit 60. On the other hand, the high-pass filter is a T-type filter and has a configuration in which a series circuit of the coil 30 and the capacitor 29 is interposed between the two capacitors 27 and 28 connected in series and the ground potential. This high-pass filter is connected to the antenna terminal TA on the one hand and is connected to the first high-frequency switch section 40 on the other hand.

At the time of transmission, the diplexer unit 20 combines the UMTS and DCS transmission signals and the GSM transmission signal and sends them to the antenna ANT side. In particular,
UMT sent through the first high-frequency switch unit 40
The S transmission signal and the DCS transmission signal and the GSM transmission signal sent through the third high frequency switch unit 60 are combined by the diplexer unit 20 and output from the antenna terminal TA to the antenna ANT side. On the other hand, when receiving, UM
The received signals of TS, DCS and GSM are separated and sent to the first high frequency switch section 40 or the third high frequency switch section 60. Specifically, the received signals of UMTS, DCS, and GSM received by the antenna ANT and input to the antenna terminal TA are received by the low-pass filter and the high-pass filter of the diplexer unit 20 and the received signals of UMTS and DCS and the received signal of GSM. The UMTS reception signal and the DCS reception signal are sent to the first high frequency switch section 40, and the GSM reception signal is sent to the third high frequency switch section 60.

Next, the first connecting to the diplexer unit 20
The high frequency switch section 40 will be described. When using the UMTS communication system, the first high-frequency switch unit 40 sends a transmission signal from the transceiver TXRX1 of the UMTS communication system to the diplexer unit 20 or a reception signal from the diplexer unit 20 of the UMTS communication system. It is sent to the transmitter / receiver TXRX1 side. On the other hand, when using the DCS communication system, the transmitter T of the DCS communication system
The transmission signal from X2 is sent to the diplexer unit 20, or the reception signal from the diplexer unit 20 is sent to the receiving unit RX2 side of the DCS communication system. That is, the transmission / reception of the UMTS communication system and the transmission / reception of the DCS communication system can be switched. In other words, when using the UMTS communication system, the transmission signal input to the UMTS transmission / reception input / output terminal TR1 is sent to the diplexer unit 20, or the reception signal from the diplexer unit 20 is transmitted to the Uplexer unit.
Output to the MTS transmission / reception input / output terminal TR1. On the other hand, DC
When using the S communication system, the DCS transmission input terminal T
The transmission signal input to 2 is sent to the diplexer unit 20,
Alternatively, the received signal from the diplexer unit 20 is converted to DCS.
Output to the reception output terminal R2.

Specifically, the diplexer unit 20 is 1
One end of the / 4λ line 41 and the anode side of the diode 45 are connected to each other. The other end of the 1/4? Line 41 is connected to the UMTS transmission / reception input / output terminal TR1. The cathode side of the diode 42 is connected between them. The anode side of the diode 42 is grounded via the capacitor 43 on the one hand, and is connected to the first control terminal Vc1 on the other hand via the current limiting resistor 44. In addition, the diode 4 connected to the diplexer unit 20
The cathode side of 5 is connected to the second high-frequency switch section 50, and a coil 48, one of which is grounded, is connected between them. A series circuit of a coil 46 and a capacitor 47 is formed in parallel with the diode 45.

In the first high frequency switch section 40, the UM
The transmission / reception of the TS communication system and the transmission / reception of the DCS communication system are switched. Specifically, when a positive potential is applied to the first control terminal Vc1, the two diodes 42 and 45 are turned on (low impedance). Therefore, the DCS transmission signal sent through the second high frequency switch unit 50 can be sent to the diplexer unit 20 through the diode 45. In addition, D from the diplexer unit 20
The CS reception signal can also be sent to the second high frequency switch section 50 through the diode 45. On the other hand, since the diode 42 is in the ON state, the 1/4 λ line 41
Since one end of the above is grounded, the other end is phase-inverted to be open. Therefore, the DCS transmission signal and the DCS reception signal are prevented from being transmitted to the UMTS transmission / reception input / output terminal TR1 through the 1/4? Line 41.

On the other hand, when the first control terminal Vc1 is set to the ground potential, the two diodes 42 and 45 are turned off (high impedance). Therefore, the UMTS transmission signal from the UMTS transmission / reception input / output terminal TR1 is
It can be sent to the diplexer unit 20 through the line 41. Further, the UMTS reception signal from the diplexer unit 20 can be output to the UMTS transmission / reception input / output terminal TR1 through the ¼λ line 41. On the other hand, since the diode 45 is in the off state, the UMTS transmission signal and the UMTS reception signal are not sent to the second high frequency switch section. In addition, the DCS transmission signal is the diode 45
It is also prevented from being sent through. The coil 4
6 and the capacitor 47, the diode 4 in the off state
Signals are prevented from leaking through 5.

Next, the second high frequency switch section 50 connected to the first high frequency switch section 40 will be described. The second high-frequency switch unit 50 sends the transmission signal from the transmission unit TX2 of the DCS communication system to the first high-frequency switch unit 40 during transmission, and receives the DCS from the first high-frequency switch unit 40 during reception. The DCS communication system is configured to be switchable between transmission and reception so as to send a signal to the reception unit RX2 side of the DCS communication system. In other words, during transmission, the DCS transmission signal input to the DCS transmission input terminal T2 is sent to the first high frequency switch unit 40, and during reception, the DCS reception signal from the first high frequency switch unit 40 is received by DCS reception. DC to output to output terminal R2
The S communication system is configured to be switchable between transmission and reception.

Specifically, one end of the 1/4 λ line 51 and the anode side of the diode 55 are connected to the first high-frequency switch section 40 via a capacitor 59, respectively. Of these, the other end of the ¼λ line 51 is connected to the DCS reception output terminal R2. Also, between these,
The cathode side of the diode 52 is connected. The anode side of the diode 52 is grounded via the capacitor 53 on the one hand, and is connected to the second control terminal Vc2 on the other hand via the current limiting resistor 54. The cathode side of the diode 55 is connected to the first low pass filter section 70,
A coil 58, one of which is grounded, is connected between them. A series circuit of a coil 56 and a capacitor 57 is formed in parallel with the diode 55.

In the second high frequency switch section 50, the DC
The S communication system is switched between transmission and reception. Specifically, when a positive potential is applied to the second control terminal Vc2, the two diodes 52 and 55 are turned on. Therefore, the first
The DCS transmission signal sent through the low pass filter unit 70 can be sent to the first high frequency switch unit 40 through the diode 55 and the capacitor 59. On the other hand, since the diode 52 is in the ON state, 1 /
Since one end of the 4λ line 51 is grounded, the other end is phase-inverted and opened. Therefore, the DCS transmission signal is 1
It is prevented from being transmitted to the DCS reception output terminal R2 through the / 4λ line 51.

On the other hand, when the second control terminal Vc2 is set to the ground potential, the two diodes 52 and 55 are turned off. Therefore, the DCS from the first high frequency switch unit 40
The reception signal can be sent to the DCS reception output terminal R2 through the capacitor 59 and the 1/4? Line 51.
On the other hand, since the diode 55 is off, D
The CS reception signal is not sent to the first low-pass filter unit, and the DCS transmission signal is also prevented from being sent through the diode 55. The coil 56 and the capacitor 57 prevent the signal from leaking through the diode 55 in the off state.

The first low-pass filter section 70 connected to the second high-frequency switch section 50 is connected to the transmission section TX2 of the DCS communication system and the DCS transmission output terminal T2 on the other side. The first low pass filter unit 70 is a DCS.
It transmits a transmission signal and attenuates the second harmonic and the third harmonic. Specifically, the first low-pass filter unit 70 is a π-type filter, and includes a capacitor 73, a capacitor 73 and a coil 72 in front of and behind the parallel circuit, respectively.
It is configured to be grounded via 74.

Next, the third high frequency switch section 60 will be described. The third high-frequency switch unit 60 sends the transmission signal from the transmission unit TX3 of the GSM communication system to the diplexer unit 20 at the time of transmission, and receives the GSM reception signal from the diplexer unit 20 at the time of reception of the GSM communication system. The GSM communication system is configured to be switchable between transmission and reception so as to be transmitted to the reception unit RX3 side. In other words, when transmitting, the transmission signal input to the GSM transmission input terminal T3 is sent to the diplexer unit 20, and when receiving, the reception signal from the diplexer unit 20 is output to the GSM reception output terminal R3. , GSM communication system can be switched between transmission and reception.

Specifically, one end of the 1/4 λ line 61 and the anode side of the diode 65 are connected to the diplexer section 20 via a capacitor 67, respectively. Of these, the other end of the 1/4? Line 61 is connected to the GSM reception output terminal R3. The cathode side of the diode 62 is connected between them. The anode side of the diode 62 is grounded via the capacitor 63 on the one hand and is connected to the third control terminal Vc3 via the current limiting resistor 64 on the other hand. The cathode side of the diode 65 is connected to the second low pass filter section 80, and
The space between them is grounded via a coil 66.

In the third high frequency switch section 60, the GS
Switching between transmission and reception of the M communication system. Specifically, when a positive potential is applied to the third control terminal Vc3, the two diodes 62 and 65 are turned on. Therefore, the second
The GSM transmission signal sent through the low pass filter unit 80 can be sent out to the diplexer unit 20 through the diode 65 and the capacitor 67. On the other hand, since the diode 62 is in the ON state, one end of the ¼λ line 61 is in the grounded state, and the other end is phase-inverted and is in the open state. Therefore, the GSM transmission signal is 1 / 4λ
It is prevented from being sent to the GSM reception output terminal R3 through the line 61.

On the other hand, when the third control terminal Vc3 is set to the ground potential, the two diodes 62 and 65 are turned off. Therefore, the G sent from the diplexer unit 20
The SM reception signal is sent to the capacitor 67 and the 1/4 λ line 61.
Can be sent to the GSM reception output terminal R3 through. On the other hand, since the diode 65 is in the off state, the GSM reception signal is not sent to the second low pass filter unit 80, and the GSM transmission signal is also prevented from being sent through the diode 65.

The second low-pass filter section 80 connected to the third high-frequency switch section 60 is connected to the transmitter section TX3 of the GSM communication system and the GSM transmission input terminal T3 on the other side. The second low pass filter unit 80 is a GSM
It transmits a transmission signal and attenuates the second harmonic and the third harmonic. Specifically, the second low-pass filter unit 80 is a π-type filter, and includes a capacitor 83, a capacitor 81 and a coil 82 before and after the parallel circuit.
It is configured to be grounded via 84.

As described above, the composite high frequency component 1
The high frequency circuit 11 includes a diplexer unit 20, first, second and third high frequency switch units 40, 50 and 60.
Therefore, the transceiver TXRX1 of the UMTS communication system
When transmitting a transmission signal from the antenna, it can be transmitted to the antenna ANT side through the first high frequency switch unit 40 and the diplexer unit 20. When transmitting the transmission signal from the transmission unit TX2 of the DCS communication system, it can be transmitted to the antenna ANT side through the second high frequency switch unit 50, the first high frequency switch unit 40, and the diplexer unit 20. When transmitting the transmission signal from the transmission unit TX3 of the GSM communication system, it can be transmitted to the antenna ANT side through the third high frequency switch unit 60 and the diplexer unit 20.

On the other hand, when the UMTS received signal is received by the transmitter / receiver TXRX1 of the UMTS communication system, the UMTS received signal from the antenna ANT side is passed through the diplexer unit 20 and the first high frequency switch unit 40.
It can be sent to the transmit / receive TXRX1 of the communication system. In addition, when the reception unit RX2 of the DCS communication system receives the DCS reception signal, the DCS reception signal from the antenna ANT side is transmitted through the diplexer unit 20, the first high frequency switch unit 40, and the second high frequency switch unit 50 to the second It can be sent to the receiver TX2 of the communication system. Further, when the GSM reception signal is received by the reception unit RX3 of the GSM communication system, the GSM reception signal from the antenna ANT side is received by the reception unit R of the GSM communication system through the diplexer unit 20 and the third high frequency switch unit 60.
It can be sent to X3.

That is, the composite high frequency component 1 and the high frequency circuit 11 are used in the UMT in which the frequency bands used are close to each other.
S communication system and DCS communication system, and GSM whose frequency band used for these communication systems is separated
It can correspond to each communication system. Also,
The mobile phone 91 including the composite high frequency component 1 and the high frequency circuit 11 is also compatible with the UMTS communication system, the DCS communication system, and the GSM communication system, respectively.

In particular, the first embodiment includes the UMTS communication system which is a CDMA communication system. In the CDMA system, due to its nature, standards such as adjacent channel distortion are strict. In the first embodiment, the diplexer unit 20 and the transmission / reception unit TXRX1 of the UMTS communication system.
(UMTS transmission / reception input / output terminal TR1) is connected only by the circuit wiring and the passive component (1 / 4λ line 41). Therefore, since the signal does not flow through the diodes 45, 55, etc., distortion is unlikely to occur in the UMTS reception signal or transmission signal.

(Modification 1) Next, a modification of the first embodiment will be described. The description of the same parts as those in the first embodiment will be omitted or simplified. The mobile phone according to the first modification has a DCS in which the frequency bands used are close to each other.
The above points are applicable to a communication system (first communication system), a PCS communication system (second communication system), and a GSM communication system (third communication system) whose frequency bands used are different from each other. Different from the first embodiment. Other than that, it is the same as the first embodiment.

Specifically, as shown in FIG. 4, a transceiver TXRX1 of a DCS communication system is provided instead of the transceiver TXRX1 of the UMTS communication system of the first embodiment. Further, a transmitter TX2 and a receiver RX2 of the PCS communication system are provided instead of the transmitter TX2 and the receiver RX2 of the DCS communication system of the first embodiment. The transmitter TX3 and the receiver RX of the GSM communication system
3 is the same as in the above-described first embodiment.

With such a configuration, the DCS communication system is a communication system that is used more frequently than the PCS communication system, and when the diodes 42 and 45 included in the first high frequency switch section 40 are turned on. , PC
When switching to the transmission / reception of the S communication system and turning off the diodes 42 and 45, the transmission / reception of the DCS communication system is switched. In other words, a PC that is rarely used
When the S communication system is used, the diode 42,
It consumes power to turn on 45, but does not consume power when using a frequently used DCS communication system. Therefore, when viewed as a whole, the power consumption of the first high-frequency switch unit 40 can be saved. Therefore, battery consumption is suppressed and the mobile phone 91
It is possible to lengthen the standby time and call availability time of.

(Second Embodiment) Next, a second embodiment will be described. The description of the same parts as those in the first embodiment will be omitted or simplified. The mobile phone according to the second embodiment is similar to the above-described first embodiment in that the UMTS communication system and the DCS communication system in which the used frequency bands are close to each other, and the GS in which the frequency band used is separated from these.
It is compatible with each of the M communication systems. Then, in the same manner as in the first embodiment, the mobile phone has the composite high frequency component mounted therein. Further, a high frequency circuit 111 including a circuit formed in the composite high frequency component is formed in the mobile phone as shown in FIG.

In the composite high frequency component of the second embodiment, the glass ceramic is used as the insulating layer, and
A part of the high-frequency circuit 111 is configured by a circuit element formed inside a ceramic multilayer substrate having g as a conductive layer and chip components such as a chip diode mounted on the main surface thereof. The ceramic multilayer substrate has a substantially rectangular parallelepiped shape, and a plurality of castellations are formed on each of four side surfaces thereof.

A high frequency circuit 111 formed in this composite high frequency component will be described with reference to FIG. The high frequency circuit 111 includes a diplexer unit 120, a fourth high frequency switch unit 140, a third high frequency switch unit 160, and a first high frequency switch unit 140.
The low pass filter unit 170 and the second low pass filter unit 180 are provided. Of these, the diplexer unit 120 is
It has the same functions and configurations as those of the first embodiment. That is,
The diplexer unit 120 includes capacitors 121, 122,
Two-stage low-pass filter consisting of 124, 125 and coils 123, 126, and capacitors 127, 128, 1
29 and a high pass filter including a coil 130.

In the diplexer unit 120,
At the time of transmission, the UMTS transmission signal and the DCS transmission signal sent through the fourth high-frequency switch unit 140, and the third
The GSM transmission signal sent through the high-frequency switch unit 160 is combined to connect the antenna terminal TA to the antenna A.
Output to NT side. On the other hand, when receiving, the antenna ANT
The received signal input from the antenna terminal TA to the UMT
The SMTS and DCS reception signals are separated into GSM reception signals, the UMTS reception signals and DCS reception signals are sent to the fourth high-frequency switch section 140, and the GSM reception signals are sent to the third high-frequency switch section 160.

Next, the fourth high frequency switch section 140 connected to the diplexer section 120 will be described. This 4th
When using the UMTS communication system, the high frequency switch unit 140 uses the transceiver TXRX of the UMTS communication system.
1 is sent to the diplexer unit 120, or the received signal from the diplexer unit 120 is sent to UMTS.
The data is sent to the transmitter / receiver TXRX1 side of the communication system. On the other hand, D
When transmitting using the CS communication system, the transmitting signal from the transmitting unit TX2 of the DCS communication system is sent to the diplexer unit 120, and when receiving using the DCS communication system, the receiving signal from the diplexer unit 120 is transmitted. DCS
It is sent to the reception unit RX2 side of the communication system. That is, UMTS
Transmission and reception of communication system and transmission of DCS communication system and D
The CS communication system is configured to be switchable between reception and reception. In other words, when using the UMTS communication system, the transmission signal input to the UMTS transmission / reception input / output terminal TR1 is sent to the diplexer unit 120, or the reception signal from the diplexer unit 120 is output to the UMTS transmission / reception input / output terminal TR1. To do. On the other hand, when transmitting using the DCS communication system, the transmission signal input to the DCS transmission input terminal T2 is sent to the diplexer unit 120, and when receiving using the DCS communication system, the diplexer unit 1
The reception signal from 20 is output to the DCS reception output terminal R2.

Specifically, the diplexer unit 120 is
One end of the 1/4 λ line 141 and the diodes 145, 15
0 is connected to the cathode side. this house,
The other end of the 1/4? Line 141 is connected to the UMTS transmission / reception input / output terminal TR1. The anode side of the diode 142 is connected between them. The cathode side of the diode 142 is, on the other hand, the capacitor 143.
Via the current limiting resistor 144. In addition, the anode side of the diode 145 is
It is connected to the DCS reception output terminal R2. And between these, it is grounded through the series circuit which consists of the coil 148 and the capacitor | condenser 149. The first control terminal Vc1 is inserted between the coil 148 and the capacitor 149. A series circuit of a coil 146 and a capacitor 147 is formed in parallel with the diode 145. Further, the anode side of the diode 150 is connected to the first low pass filter section 170. And between these, it is grounded through the series circuit which consists of the coil 153 and the capacitor 154. The second control terminal Vc2 is inserted between the coil 153 and the capacitor 154. The coil 1 is connected in parallel with the diode 150.
A series circuit of 51 and the capacitor 152 is formed.

In the fourth high frequency switch section 140, U
The transmission / reception of the MTS communication system, the transmission of the DCS communication system, and the reception of the DCS communication system are switched. Specifically, the first control terminal Vc2 is set to the first potential in the state with the ground potential.
When a positive potential is applied to the control terminal Vc1, the diode 14
2, 145 are turned on and the diode 150 is turned off. Then, the DCS reception signal from the diplexer unit 120 can be sent to the DCS reception output terminal R2 through the diode 145. On the other hand, the diode 15
Since 0 is turned off, the DCS transmission signal is prevented from being transmitted through the diode 150, and the DCS reception signal is also prevented from being transmitted to the first low pass filter section 170. The coil 151 and the capacitor 15
2 prevents the signal from leaking through the diode 150 in the off state. Further, since the diode 142 is in the ON state, one end of the ¼λ line 141 is in the grounded state, and the other end is phase-inverted and in the open state. Therefore, the DCS reception signal is also prevented from being sent to the UMTS transmission / reception input / output terminal TR1.

When a positive potential is applied to the second control terminal Vc2 with the first control terminal set to the ground potential, the diodes 150 and 142 are turned on and the diode 145 is turned off. Then, the first low-pass filter unit 170
The DCS transmission signal sent through the
50 to the diplexer unit 120. On the other hand, since the diode 145 is turned off, the DCS transmission signal and the DCS reception signal are transmitted to the diode 14
5 is prevented from being sent out. The coil 146 and the capacitor 147 prevent a signal from leaking through the diode 145 in the off state. Further, since the diode 142 is in the ON state, 1
Since one end of the / 4λ line 141 is grounded, the other end is phase-inverted and opened. Therefore, the DCS transmission signal is prevented from being sent to the UMTS transmission / reception input / output terminal TR1.

For these, the first and second control terminals V
When both c1 and Vc2 are set to the ground potential, all the three diodes 142, 145 and 150 are turned off.
Then, the UMT from the UMTS transmission / reception input / output terminal TR1
The S transmission signal can be sent to the diplexer unit 120 via the ¼λ line 141. In addition, the UMTS reception signal from the diplexer unit 120 is transmitted to the 1 / 4λ line 1
It can be sent to UMTS transmission / reception input / output terminal TR1 through 41. On the other hand, since the diode 145 is in the off state, no signal is sent to the DCS reception output terminal R2. Further, since the diode 150 is also in the off state, a signal is prevented from flowing through the diode 150.

The first low pass filter section 170 connected to the fourth high frequency switch section 140 is the same as that of the first embodiment.
It has the same function and configuration as the first low-pass filter unit 70. That is, the first low-pass filter section 170 has a configuration in which the front and rear of the parallel circuit of the capacitor 171 and the coil 172 are grounded via the capacitors 173 and 174, respectively, and allows the DCS transmission signal to pass therethrough. Attenuate the waves.

Next, the third high frequency switch section 160 will be described. The third high-frequency switch unit 160 has the same function as the third high-frequency switch unit 60 of the first embodiment when viewed as a whole, but the configuration is slightly different. That is, compared with the diodes 62 and 65 of the first embodiment,
The diodes 162 and 165 are arranged in opposite directions. Further, the coil 166 is grounded via the capacitor 167, and the third control terminal is drawn out from between this.

Specifically, the diplexer section 120 is
One end of the 1/4? Line 161 and the cathode side of the diode 165 are connected via the capacitor 168. Of these, the other end of the 1/4?
It is connected to the reception output terminal R3. The anode side of the diode 162 is connected between them.
The cathode side of the diode 162 is grounded via the capacitor 163 on the one hand and grounded via the current limiting resistor 164 on the other hand. Further, the anode side of the diode 165 is connected to the second low pass filter section 180. In addition, these are grounded via a coil 66 and a capacitor 167 which are connected in series. Coil 16
6 and the capacitor 167, the third control terminal Vc
3 is pulled out.

In the third high frequency switch section 160, G
Switching between transmission and reception of the SM communication system. Specifically, when a positive potential is applied to the third control terminal Vc3, the two diodes 165 and 162 are turned on. Therefore, the GSM transmission signal sent through the second low pass filter unit 180 can be sent to the diplexer unit 120 through the diode 165 and the capacitor 168. On the other hand, since the diode 162 is in the ON state, one end of the ¼λ line 161 is in the grounded state, and the other end is phase-inverted and in the open state. Therefore, GS
The M transmission signal is prevented from being transmitted to the GSM reception output terminal R3 through the 1/4? Line 161.

On the other hand, when the third control terminal Vc3 is set to the ground potential, the two diodes 162 and 165 are turned off. Therefore, the GSM received signal sent from the diplexer unit 120 is supplied to the capacitor 168 and ¼λ.
It can be sent to the GSM reception output terminal R3 through the line 161. On the other hand, since the diode 165 is in the off state, the GSM reception signal is not sent to the second low pass filter section 180, and the GSM transmission signal is also prevented from being sent through the diode 165.

The second low-pass filter section 180 connected to the third high-frequency switch section 160 is the same as in the first embodiment.
The second low-pass filter section 80 has the same function and configuration. That is, the second low-pass filter unit 180 has a configuration in which the front and rear of the parallel circuit of the capacitor 181 and the coil 182 are grounded via the capacitors 183 and 184, respectively, to allow the GSM transmission signal to pass therethrough, and the second and third harmonics. Attenuate the waves.

As described above, the composite high frequency component and the high frequency circuit 111 includes the diplexer section 120, the third and third circuits.
The fourth high frequency switch unit 160, 140 is provided. Therefore, when transmitting the transmission signal from the transmission / reception unit TXRX1 of the UMTS communication system, it can be transmitted to the antenna ANT side through the fourth high-frequency switch unit 140 and the diplexer unit 120. Further, when transmitting the transmission signal from the transmission unit TX2 of the DCS communication system, it can be transmitted to the antenna ANT side through the fourth high frequency switch unit 140 and the diplexer unit 120. Further, when transmitting the transmission signal from the transmission unit TX3 of the GSM communication system, it can be transmitted to the antenna ANT side through the third high frequency switch unit 160 and the diplexer unit 120.

On the other hand, when the UMTS received signal is received by the transmitter / receiver TXRX1 of the UMTS communication system, the UMTS received signal from the antenna ANT side is transmitted through the diplexer unit 120 and the fourth high frequency switch unit 140 to the UM.
It can be sent to the transceiver TXRX1 of the TS communication system. Further, when receiving the DCS reception signal in the reception unit RX2 of the DCS communication system, the DCS reception signal from the antenna ANT side is transmitted to the reception unit TX2 of the second communication system through the diplexer unit 120 and the fourth high frequency switch unit 140. Can be sent out. Further, when the GSM reception signal is received by the reception unit RX3 of the GSM communication system, the GSM reception signal from the antenna ANT side is
Diplexer unit 120 and third high frequency switch unit 160
Can be sent to the receiving unit RX3 of the GSM communication system.

That is, the composite high frequency component and the high frequency circuit 111 are used in the UMT in which the frequency bands used are close to each other.
S communication system and DCS communication system, and GSM whose frequency band used for these communication systems is separated
It can correspond to each communication system. Also,
A mobile phone including the composite high frequency component and the high frequency circuit 111 can also support the UMTS communication system, the DCS communication system, and the GSM communication system, respectively.

Further, particularly in the second embodiment, the UMTS communication system which is a CDMA communication system is included. In the CDMA system, due to its nature, standards such as adjacent channel distortion are strict. In the second embodiment, the diplexer unit 120 and the transmitter / receiver unit TXRX1 of the UMTS communication system.
The (UMTS transmission / reception input / output terminal TR1) is connected only by the circuit wiring and the passive component (1 / 4λ line 141). For this reason, the signal does not flow through the diodes 145, 150, etc., so that distortion is unlikely to occur in the UMTS reception signal or transmission signal.

(Modification 2) Next, a modification of the second embodiment will be described. The description of the same parts as those in the second embodiment will be omitted or simplified. The mobile phone according to the second modification is a DCS whose frequency bands used are close to each other.
The above points are applicable to a communication system (first communication system), a PCS communication system (second communication system), and a GSM communication system (third communication system) whose frequency bands used are different from each other. Different from the second embodiment. Other than that, it is the same as the second embodiment.

Specifically, as shown in FIG. 6, a transceiver TXRX1 of a DCS communication system is provided instead of the transceiver TXRX1 of the UMTS communication system of the second embodiment. Further, a transmitter TX2 and a receiver RX2 of the PCS communication system are provided instead of the transmitter TX2 and the receiver RX2 of the DCS communication system of the second embodiment. The transmitter TX3 and the receiver RX of the GSM communication system
3 is the same as that of the above-mentioned Embodiment 2.

With such a configuration, the DCS communication system is a communication system that is used more frequently than the PCS communication system. Therefore, any one of the diodes 142, 145, and 150 included in the fourth high-frequency switch section 140 can be used. When one of these diodes 142, 1 is turned on, the PCS communication system switches to transmission or reception.
When both 45 and 150 are turned off, the transmission / reception of the DCS communication system is switched. That is, when a PCS communication system that is used infrequently is used, power for turning on the diode is consumed, but when a DCS communication system that is used frequently is used, no power is consumed. Therefore, when viewed as a whole, the power consumption of the fourth high-frequency switch unit 140 can be saved. Therefore, it is possible to suppress the consumption of the battery and prolong the usable time of the mobile phone.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above-described first and second embodiments and the first and second modifications, and does not depart from the gist of the invention. Needless to say, it can be applied with appropriate changes. For example, a filter such as a SAW filter may be interposed between each switch unit and the receiving unit, such as between the second high frequency switch unit 50 and the receiving unit RX2 of the DCS communication system.

[Brief description of drawings]

FIG. 1 is a plan view showing a mobile communication device according to a first embodiment.

FIG. 2 is a perspective view showing a form of a composite high frequency component according to the first embodiment.

FIG. 3 is an explanatory diagram showing a functional block and a circuit diagram of a high frequency circuit of the composite high frequency component according to the first embodiment.

FIG. 4 is an explanatory diagram showing a functional block and a circuit diagram of a high frequency circuit of a composite high frequency component according to a first modification.

FIG. 5 is an explanatory diagram showing a functional block and a circuit diagram of a high frequency circuit of a composite high frequency component according to a second embodiment.

FIG. 6 is an explanatory diagram showing a functional block and a circuit diagram of a high frequency circuit of a composite high frequency component according to Modification 2;

[Explanation of symbols]

1 Multiple high-frequency components 11,111 High-frequency circuits 20,120 Diplexer section 40 First high-frequency switch section 50 Second high-frequency switch section 60,160 Third high-frequency switch section 140 Fourth high-frequency switch section 70,170 First low-pass filter section 80, 180 Second low-pass filter unit 91 Mobile phone (mobile communication device) ANT antenna TA Antenna terminal TR1 UMTS transmission / reception input / output terminal (first transmission / reception input / output terminal) T2 DCS transmission input terminal (second transmission input terminal) R2 DCS reception output Terminal (second reception output terminal) T3 GSM transmission input terminal (third transmission input terminal) R3 GSM reception output terminal (third reception output terminal) TXRX1 (for UMTS communication system) transceiver TX2 (for DCS communication system) transmitter RX2 (in DCS communication system) receiver TX3 (GS Communication systems) transmitting section RX3 (of the GSM communication system) receiver

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5J012 BA03 BA04                 5J024 BA03 BA04 CA03 CA09 CA20                       DA01 DA29 DA35 EA01 EA02                       EA03                 5K011 BA03 DA02 DA22 DA25 DA27                       FA01 JA01 KA03

Claims (10)

[Claims] 1. Corresponding to a first communication system and a second communication system in which frequency bands used are close to each other, and a third communication system in which frequency bands used from these first and second communication systems are separated, A high-frequency circuit that combines the transmission signals from the transmission units of the first to third communication systems and sends them to the antenna side, separates the reception signals from the antenna side and sends them to the corresponding reception units of the first to third communication systems. At the time of transmission, the transmission signal from the transmission unit of the first or second communication system and the transmission signal from the transmission unit of the third communication system are combined and sent to the antenna side for reception. In this case, the received signal from the antenna side is converted into the first and second signals.
When using the diplexer unit that separately sends to the receiving unit side of the communication system and the receiving unit side of the third communication system, and when using the first communication system, the transmission signal from the transmitting unit of the first communication system is used. Send to the diplexer unit, or send the received signal from the diplexer unit to the receiver unit side of the first communication system, and when using the second communication system, transmit from the transmitter unit of the second communication system. Switching between transmission / reception of the first communication system and transmission / reception of the second communication system so that a signal is sent to the diplexer unit or a received signal from the diplexer unit is sent to the receiving unit side of the second communication system. A first high-frequency switch unit configured to be capable of transmitting a transmission signal from the transmission unit of the second communication system to the first high-frequency switch unit during transmission. When receiving, the first high-frequency switch unit is configured to be capable of switching between transmission and reception of the second communication system so that a reception signal from the first high-frequency switch unit is sent to the reception unit side of the second communication system. 2 a high-frequency switch unit, and when transmitting, sends a transmission signal from the transmitting unit of the third communication system to the diplexer unit, and when receiving, receives a receiving signal from the diplexer unit of the third communication system A high-frequency circuit, comprising: a third high-frequency switch unit configured to be capable of switching between transmission and reception of the third communication system so as to be sent to the unit side. 2. The high frequency circuit according to claim 1, wherein the first communication system is a CDMA communication system, and the diplexer unit and the transmission unit and the reception unit of the first communication system are: A high-frequency circuit in which only circuit wiring or only circuit wiring and passive components are connected. 3. The high frequency circuit according to claim 1, wherein the first communication system is a communication system that is used more frequently than the second communication system, and the first high frequency switch unit. Switches to transmission / reception of the second communication system when any active switch component included therein is turned on, and transmits / receives to the first communication system when any active switch component is turned off. A high-frequency circuit configured to switch between transmission and reception of the first communication system and transmission and reception of the second communication system so as to be switched. 4. Corresponding to a first communication system and a second communication system in which frequency bands used are close to each other, and a third communication system in which frequency bands used from these first and second communication systems are separated, A high-frequency circuit that combines the transmission signals from the transmission units of the first to third communication systems and sends them to the antenna side, separates the reception signals from the antenna side and sends them to the corresponding reception units of the first to third communication systems. At the time of transmission, the transmission signal from the transmission unit of the first or second communication system and the transmission signal from the transmission unit of the third communication system are combined and sent to the antenna side for reception. In this case, the received signal from the antenna side is converted into the first and second signals.
When using the diplexer unit that separately sends to the receiving unit side of the communication system and the receiving unit side of the third communication system, and when using the first communication system, the transmission signal from the transmitting unit of the first communication system is used. When transmitting to the diplexer unit or the received signal from the diplexer unit to the receiving unit side of the first communication system and transmitting using the second communication system, the transmitting unit of the second communication system When transmitting the transmission signal from the diplexer unit to the diplexer unit and receiving the signal using the second communication system, the reception signal from the diplexer unit is transmitted to the reception unit side of the second communication system. A fourth high-frequency switch unit configured to switch between transmission and reception of the communication system, transmission of the second communication system, and reception of the second communication system; The third communication system so that the transmission signal from the transmission unit of the third communication system is sent to the diplexer unit, and the reception signal from the diplexer unit is sent to the reception unit side of the third communication system when receiving. And a third high-frequency switch unit configured to be able to switch between transmission and reception. 5. The high frequency circuit according to claim 4, wherein the first communication system is a CDMA communication system, and the diplexer unit and the transmission unit and the reception unit of the first communication system include: A high-frequency circuit in which only circuit wiring or only circuit wiring and passive components are connected. 6. The high frequency circuit according to claim 4, wherein the first communication system is a communication system that is used more frequently than the second communication system, and the fourth high frequency switch unit. Switches to transmission or reception of the second communication system when any of the active switch components included therein is turned on, and when any of the active switch components is turned off of the first communication system. In order to switch to transmission / reception, transmission / reception of the first communication system, transmission of the second communication system, and transmission of the second communication system are performed.
A high-frequency circuit configured to be switchable between reception and reception of a communication system. 7. A mobile communication system corresponding to a first communication system and a second communication system having frequency bands used close to each other, and a third communication system having a frequency band used separated from those of the first and second communication systems. A mobile communication device comprising a high-frequency circuit according to any one of claims 1 to 6. 8. Corresponding to a first communication system and a second communication system in which frequency bands used are close to each other, and a third communication system in which frequency bands used from these first and second communication systems are distant from each other, and an antenna is used. An antenna terminal to be connected, a first transmission / reception input / output terminal connected to the transmission / reception unit of the first communication system, a second transmission input terminal connected to the transmission unit of the second communication system, and the second communication A second reception output terminal connected to the reception section of the system, a third transmission input terminal connected to the transmission section of the third communication system, and a third reception output connected to the reception section of the third communication system. A first transmission / reception input / output terminal, a second transmission input terminal, and a third terminal.
The transmission signal input to any one of the transmission input terminals is output to the antenna terminal, and the reception signal input to the antenna terminal is converted to the first transmission / reception input / output terminal, the second reception output terminal, and the third reception output terminal. Which is output to either the first transmission / reception input / output terminal or the second transmission input terminal during transmission, and the transmission signal input to the third transmission input terminal. Are combined and output to the antenna terminal, and at the time of reception, the reception signal input to the antenna terminal is connected to the first transmission / reception input / output terminal, the second reception output terminal side, and the third reception output terminal side. When using the first communication system and the diplexer unit that is separately transmitted, the transmission signal input to the first transmission / reception input / output terminal is sent to the diplexer unit, or the diplexer unit. These received signals are output to the first transmission / reception input / output terminal, and when the second communication system is used, the transmission signal input to the second transmission input terminal is sent to the diplexer unit or the diplexer. A first high-frequency switch unit configured to switch between transmission and reception of the first communication system and transmission and reception of the second communication system so that a reception signal from the unit is output to the second reception output terminal; In this case, the transmission signal input to the second transmission input terminal is sent to the first high frequency switch section, and when receiving, the reception signal from the first high frequency switch section is output to the second reception output terminal. As described above, the second high-frequency switch unit configured to switch between transmission and reception of the second communication system, and the transmission signal input to the third transmission input terminal at the time of transmission A third high frequency wave configured to be switchable between transmission and reception of the third communication system so that the reception signal from the diplexer unit is sent to the duplexer unit and is output to the third reception output terminal when receiving. A composite high frequency component including a switch section. 9. An antenna, which is compatible with a first communication system and a second communication system in which frequency bands used are close to each other, and a third communication system in which frequency bands used from these first and second communication systems are separated, An antenna terminal to be connected, a first transmission / reception input / output terminal connected to the transmission / reception unit of the first communication system, a second transmission input terminal connected to the transmission unit of the second communication system, and the second communication A second reception output terminal connected to the reception section of the system, a third transmission input terminal connected to the transmission section of the third communication system, and a third reception output connected to the reception section of the third communication system. A first transmission / reception input / output terminal, a second transmission input terminal, and a third terminal.
The transmission signal input to any one of the transmission input terminals is output to the antenna terminal, and the reception signal input to the antenna terminal is converted to the first transmission / reception input / output terminal, the second reception output terminal, and the third reception output terminal. Which is output to either the first transmission / reception input / output terminal or the second transmission input terminal during transmission, and the transmission signal input to the third transmission input terminal. Are combined and output to the antenna terminal, and at the time of reception, the reception signal input to the antenna terminal is connected to the first transmission / reception input / output terminal, the second reception output terminal side, and the third reception output terminal side. When using the first communication system and the diplexer unit that is separately transmitted, the transmission signal input to the first transmission / reception input / output terminal is sent to the diplexer unit, or the diplexer unit. These received signals are output to the first transmission / reception input / output terminal, and when transmitting using the second communication system, the transmission signal input to the second transmission input terminal is output to the diplexer unit, When receiving using the second communication system, transmission and reception of the first communication system and transmission of the second communication system are performed so that the reception signal from the diplexer unit is output to the second reception output terminal. A fourth high-frequency switch unit configured to be switchable between reception and reception of the second communication system, and transmits a transmission signal input to the third transmission input terminal to the diplexer unit when transmitting, and receives the transmission signal when receiving. A third high frequency switch unit configured to switch between transmission and reception of the third communication system so that a reception signal from the diplexer unit is output to the third reception output terminal, Composite high-frequency component comprising. 10. A first communication system and a second communication system in which frequency bands to be used are close to each other, and a third communication system in which frequency bands to be used are separated from these first and second communication systems.
A mobile communication device compatible with a communication system, the mobile communication device using the composite high-frequency component according to claim 8.