WO2014119118A1

WO2014119118A1 - Wireless circuit

Info

Publication number: WO2014119118A1
Application number: PCT/JP2013/082357
Authority: WO
Inventors: 和彦池畑; 宏貴柏木; 正盛徳田
Original assignee: シャープ株式会社
Priority date: 2013-02-04
Filing date: 2013-12-02
Publication date: 2014-08-07
Also published as: JP2014154893A; JP6055329B2

Abstract

A wireless circuit (1) is provided with the following: a wireless front-end module (FEM) (11) that simultaneously outputs a plurality of transmission signals along one transmission line, said transmission signals having different frequency bands; and a low-frequency antenna tuner (161) and high-frequency antenna tuner (162) that are provided per frequency band, corresponding respectively to the plurality of transmission signals, and independently adjust impedance matching with an antenna (10) for the respective frequency bands.

Description

Wireless circuit

The present invention relates to a radio circuit.

Recently, an automatic matching circuit has been developed that automatically matches the output impedance on the signal source side and the input impedance on the load side to increase transmission efficiency (Patent Document 1). In Patent Document 1, a traveling wave component signal traveling from a signal source to a load and a reflected wave component signal from the load are detected, and a phase difference between the reflected wave component signal and the traveling wave component signal is set as a reference. Detect and determine whether the phase difference has an advance or delay component of a predetermined angle, and based on the determination result, a variable capacitor located on the signal source side and a variable capacitor located on the load side in the π match circuit The output impedance and the input impedance are matched by increasing or decreasing the capacitance.

Japanese Patent Publication “Japanese Patent Laid-Open No. 2010-87845” (published on April 15, 2010) Japanese Patent Gazette “Special Publication 2008-507942 Publication (March 13, 2008)”

However, in the conventional technology as described above, when transmitting a plurality of transmission signals having different frequency bands at the same time, if the antenna characteristics of one band are improved, the antenna characteristics of the other band may be deteriorated. Therefore, when the antenna characteristic of one band is greatly improved and the antenna characteristic of the other band is deteriorated to be smaller than the degree of improvement of the antenna characteristic of the one band, the overall antenna characteristic is improved, but sufficient There was a problem that the antenna characteristics could not be obtained.

The present invention has been made in view of the above problems, and has as its main object to provide a technique for further improving antenna characteristics when transmitting a plurality of transmission signals having different frequency bands at the same time.

In order to solve the above problems, a radio circuit according to one embodiment of the present invention is a radio circuit connected to an antenna, which simultaneously outputs a plurality of transmission signals having different frequency bands on one transmission line. An output unit, and a plurality of variable matching means that are provided for each frequency band corresponding to each of the plurality of transmission signals and independently adjust impedance matching with the antenna in each frequency band. It is a feature.

According to an aspect of the present invention, it is possible to provide a technique for further improving antenna characteristics when transmitting a plurality of transmission signals having different frequency bands at the same time.

1 is a block diagram illustrating a schematic configuration of a wireless circuit according to a first embodiment of the present invention. It is a block which shows schematic structure of the radio | wireless circuit which concerns on Embodiment 2 of this invention. It is a block which shows schematic structure of the radio | wireless circuit which concerns on Embodiment 3 of this invention. It is a block which shows schematic structure of the radio | wireless circuit which concerns on Embodiment 4 of this invention. It is a block which shows schematic structure of the radio | wireless circuit which concerns on Embodiment 5 of this invention. It is a block which shows schematic structure of the radio | wireless circuit which concerns on Embodiment 6 of this invention. It is a figure which shows an example of the antenna tuner for low bands which concerns on this invention. It is a figure which shows an example of the antenna tuner for high bands which concerns on this invention.

[Embodiment 1]
Hereinafter, embodiments of the present invention will be described in detail. Hereinafter, a radio circuit according to an embodiment of the present invention will be described. The radio circuit is a radio circuit (transmission system radio circuit) for processing a transmission signal, and can be incorporated in a radio apparatus.

In one embodiment of the present invention, the radio circuit 1 is connected to an antenna 10 as shown in FIG. 1, and includes a radio FEM (Front End Module) (transmission signal output unit) 11, a signal extraction unit 12, and a calculation unit. (Calculation means) 13, a control unit 14, a memory 15, an antenna tuner 16 and a determination unit 17 are provided. The control unit 14 includes an antenna tuner control unit (control unit) 141. The antenna tuner 16 includes a low band antenna tuner (variable matching means) 161 and a high band antenna tuner (variable matching means) 162.

The wireless FEM 11 includes an RFIC and an antenna switch duplexer. The wireless FEM 11 outputs a plurality of transmission signals having different frequency bands simultaneously through one transmission line, and each transmission signal is supplied to the signal extraction unit 12. In this specification, the wireless FEM 11 is configured to simultaneously output transmission signals of two frequency bands, a low band and a high band, but the present invention is not limited to this.

The signal extraction unit 12 extracts the traveling wave of the transmission signal transmitted via the antenna 10 and the reflected wave of the transmission signal reflected from the antenna 10. Specifically, the signal extraction unit 12 is connected between the wireless FEM 11 and the antenna tuner 16, extracts a traveling wave and a reflected wave of the transmission signal, and the traveling wave and the reflected wave are input to the calculation unit 13. As shown in FIG. The signal extraction unit 12 is realized by, for example, a coupler and a detector.

The calculation unit 13 calculates a value (evaluation value) for evaluating the matching of the antenna 10 in the transmission signal based on the traveling wave and the reflected wave input from the signal extraction unit 12. Specifically, the calculation unit 13 calculates the VSWR (Voltage Standing Wave Ratio) of the transmission signal, the transmission power level, and the like. In addition, the item (evaluation value) calculated in order for the calculation part 13 to evaluate a transmission signal is not limited to this.

The control unit 14 comprehensively controls various configurations of the wireless circuit 1. The control unit 14 includes an antenna tuner control unit 141 that controls the antenna tuner 16. The antenna tuner control unit 141 is based on the evaluation value of the transmission signal calculated by the calculation unit 13 and the setting information of the variable capacitance element of the antenna tuner 16 recorded in the memory 15. The antenna tuner 16 is controlled so that impedance matching with 10 is improved. The information recorded in the memory 15 is not limited to this. Since the evaluation value (for example, VSWR) of the transmission signal calculated by the calculation unit 13 can be used as an index of antenna matching, the matching of the antenna 10 in each of the plurality of transmission signals is improved according to the evaluation value. As described above, the antenna tuner control unit 141 controls the variable capacitance element of the antenna tuner 16, whereby the characteristics of the antenna 10 can be improved.

The antenna 10 is connected to an antenna tuner 16 that adjusts impedance matching with the antenna 10. The antenna tuner 16 is provided for each frequency band corresponding to each of a plurality of transmission signals, and has a plurality of band tuners (variable matching means) that independently adjust impedance matching with the antenna 10 in each frequency band. ing. In this embodiment, as shown in FIG. 1, the antenna tuner 16 includes a low-band antenna tuner 161 that adjusts impedance matching with the antenna 10 for a low-band transmission signal, and an antenna 10 for a high-band transmission signal. And a high-band antenna tuner 162 that adjusts impedance matching with each other.

The antenna tuner 16 is composed of a variable capacitance element. The variable capacitance element may be one that mechanically changes the capacitance of the capacitor, such as MEMS (Micro Electro Mechanical Systems), or may be a varicap diode such as a BST type, or a switch. The matching may be switched by switching the path. The antenna tuner 16 can adjust impedance matching with the antenna 10 by using such a variable capacitance element. However, the configuration of the antenna tuner 16 is not limited to this, as long as the impedance matching with the antenna 10 can be adjusted.

The determination unit 17 determines whether to continue or end the alignment adjustment based on the evaluation value calculated by the calculation unit 13. For example, when the VSWR in a specific frequency band or the whole is equal to or lower than a predetermined value, the determination unit 17 determines that the matching adjustment is finished. The determination unit 17 transmits the determination result to the control unit 14.

(Operation of the radio circuit 1)
Next, the operation of the wireless circuit 1 will be described. First, a description will be given of a case where matching adjustment is performed in a state in which low-band and high-band transmission signals are simultaneously transmitted from the wireless FEM 11, in the case of matching adjustment in the order of low band first and then high band. The alignment adjustment is performed by the following steps L1 to L6.
Step L1: The signal extraction unit 12 extracts a traveling wave and a reflected wave of the transmission signal output from the wireless FEM 11.
Step L2: The calculation unit 13 calculates an evaluation value (for example, VSWR, transmission power level, etc.) based on the traveling wave and the reflected wave extracted by the signal extraction unit 12.
Step L3: Based on the evaluation value of the transmission signal calculated by the calculation unit 13 and the setting information of the variable capacitance element of the antenna tuner 16 recorded in the memory 15, the low-band antenna tuner 161 is used. Consistency adjustment is performed. At this time, since only the low-band tuner is used, even if the tuner operates, the high-band impedance hardly changes.
Step L4: The signal extraction unit 12 extracts the traveling wave and the reflected wave of the transmission signal after the alignment adjustment.
Step L5: The calculation unit 13 calculates an evaluation value based on the traveling wave and the reflected wave extracted by the signal extraction unit 12.
Step L6: The determination unit 17 determines whether to continue or end the alignment adjustment. If it is determined to continue, the process returns to step L3. If it is determined to end, the low-band matching adjustment is terminated and the high-band matching adjustment is performed.

By performing the above steps L1 to L6, the low band matching adjustment is performed. Thereby, the characteristics of the antenna 10 can be improved in a low band.

Next, of the transmission signals simultaneously output from the wireless FEM 11, matching adjustment is performed for the transmission signals having a high frequency band in the following steps H1 to H6.
Steps H1 and H2: The same processing as in steps L1 and L2 described above is performed.
Step H3: Based on the evaluation value of the transmission signal calculated by the calculation unit 13 and the setting information of the variable capacitance element of the antenna tuner 16 recorded in the memory 15, the high band antenna tuner 162 is used. Consistency adjustment is performed. At this time, since only the high-band tuner is used, the low-band impedance hardly changes even if the tuner operates. Steps H4 and H5: The same processing as in steps L4 and L5 described above is performed.
Step H6: The determination unit 17 determines whether to continue or end the alignment adjustment. If it is determined to continue, the process returns to step H3. If it is determined to end, the high-band matching adjustment ends.

By performing the above steps H1 to H6, high band matching adjustment is performed. Thereby, the characteristics of the antenna 10 can be improved in a high band.

In the present embodiment, it has been described that the high band matching adjustment (steps H1 to H6) is performed after the low band matching adjustment (steps L1 to L6). However, the present invention is not limited to this. It is not something. Steps L1 to L6 may be performed after steps H1 to H6.

As described above, in the wireless circuit 1 according to the present embodiment, the low-band antenna tuner 161 and the high-band antenna tuner 162 provided for each frequency band corresponding to each of a plurality of transmission signals are simultaneously transmitted from the transmission signal output unit. The impedance matching with the antenna 10 in the frequency band corresponding to each of the low-band antenna tuner 161 and the high-band antenna tuner 162 can be independently adjusted for a plurality of output transmission signals. Thereby, the radio circuit 1 can suitably adjust the impedance matching with the antenna 10 in each frequency band. Therefore, the radio circuit 1 can further improve the antenna characteristics when transmitting a plurality of transmission signals having different frequency bands at the same time.

[Embodiment 2]
Another embodiment of the present invention will be described in detail. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

In one embodiment of the present invention, as shown in FIG. 2, the radio circuit 2 is connected to an antenna 20, and includes a radio FEM 11, a signal extraction unit 12, a calculation unit 13, a control unit 14, a memory 15, and an antenna tuner 26. And a determination unit 17. The antenna 20 includes a low-band antenna (antenna element) 201 that operates in a low band and a high-band antenna (antenna element) 202 that operates in a high band. The low-band antenna 201 and the high-band antenna 202 are connected in series to the low-band antenna tuner 161 and the high-band antenna tuner 162, respectively.

The antenna tuner 26 includes a low band antenna tuner 161, a high band antenna tuner 162, a filter 263, and a filter 264. In the low band antenna tuner 161 and the high band antenna tuner 162, the transmission signal output from the wireless FEM 11 through one (one system) transmission line (feed line) is divided into two parts and input through different transmission lines. is doing. The filter 263 is disposed between the wireless FEM 11 and the low band antenna tuner 161, and the filter 264 is disposed between the wireless FEM 11 and the high band antenna tuner 162.

The filter 263 and the filter 264 are, for example, bandpass filters, and are configured to transmit only a specific frequency band among a plurality of transmission signals. Specifically, the filter 263 passes only the low band, and the filter 264 passes only the high band of the transmission signal. In other words, when the antenna tuner for the low band operates, the influence on the antenna on the high band side is blocked by the filter for the high band side and does not affect the antenna impedance on the high band side. It is configured to be able to operate independently only for the band.

Thereby, in step L3 in the first embodiment described above, the low-band antenna tuner 161 is a transmission signal that has passed through the filter 263, and the transmission signal in the frequency band corresponding to the low-band antenna tuner 161 is The impedance matching with the low band antenna 201 can be adjusted. Similarly, in step H3, the high-band antenna tuner 162 applies the high-band antenna 202 to the transmission signal that has passed through the filter 264 and has a frequency band corresponding to the high-band antenna tuner 162. And impedance matching can be adjusted. That is, each of the low-band antenna tuner 161 and the high-band antenna tuner 162 does not adjust impedance matching with the antenna 20 in a frequency band other than the corresponding frequency band. Antenna characteristics when transmitting transmission signals simultaneously can be improved.

In the present embodiment, the configuration in which the antenna tuner 26 includes the filter 263 and the filter 264 has been described. However, the antenna tuner 26 may not include the filter 263 and the filter 264. As shown in FIG. 2, it is possible to input the transmission signals to the low-band antenna tuner 161 and the high-band antenna tuner 162 through different transmission lines and to take a sufficient distance from the branch. Since the influence of the change can be sufficiently reduced, even if the filter 263 and the filter 264 are not provided, for example, the impedance with the low-band antenna 201 performed by the low-band antenna tuner 161 The effect of the matching adjustment on the impedance matching adjustment with the high band antenna 202 performed by the high band antenna tuner 162 can be reduced.

[Embodiment 3]
Another embodiment of the present invention will be described in detail. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

As shown in FIG. 3, the radio circuit 3 according to the present embodiment is configured to include an antenna tuner 36 instead of the antenna tuner 26 with respect to the radio circuit 2 of the second embodiment. In the antenna tuner 36, the transmission signal that has passed through the filter 263 is input to the low band antenna 201 and the low band antenna tuner 161, and the transmission signal that has passed through the filter 264 is the high band antenna 202 and the high band antenna. It is configured to input to the tuner 162. The low band antenna tuner 161 and the high band antenna tuner 162 are each connected to the ground.

Even with such a configuration, it is possible to perform an operation equivalent to that of the above-described second embodiment, and thus it is possible to improve antenna characteristics when transmitting a plurality of transmission signals having different frequency bands at the same time. it can.

[Embodiment 4]
Another embodiment of the present invention will be described in detail. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

As shown in FIG. 4, the wireless circuit 4 according to the present embodiment is configured to include an antenna tuner 46 instead of the antenna tuner 26 with respect to the wireless circuit 2 of the second embodiment.

The antenna tuner 46 has a configuration in which transmission signals output from the wireless FEM 11 through one transmission line are input to the low-band antenna 201, the high-band antenna 202, the filter 263, and the filter 264 through different transmission lines. is there. The transmission signals that have passed through the filter 263 and the filter 264 are input to the low band antenna tuner 161 and the high band antenna tuner 162, respectively. The low band antenna tuner 161 and the high band antenna tuner 162 are each connected to the ground.

[Embodiment 5]
Another embodiment of the present invention will be described in detail. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

In an embodiment of the present invention, as shown in FIG. 5, the radio circuit 5 is connected to the antenna 10, and the radio FEM 11, the signal extraction unit 12, the calculation unit 13, the control unit 14, the memory 15, and the antenna tuner 56. And a determination unit 17. The antenna tuner 56 includes a low band antenna tuner 161, a high band antenna tuner 162, a filter 263, and a filter 264.

The antenna tuner 56 has a configuration in which a transmission signal output from the wireless FEM 11 through one transmission line (feeding line) is input to the antenna 10, the filter 263, and the filter 264. The transmission signals that have passed through the filter 263 and the filter 264 are input to the low band antenna tuner 161 and the high band antenna tuner 162, respectively. The low band antenna tuner 161 and the high band antenna tuner 162 are each connected to the ground.

Even with such a configuration, it is possible to more preferably improve the antenna characteristics when transmitting a plurality of transmission signals having different frequency bands at the same time.

[Embodiment 6]
Another embodiment of the present invention will be described in detail. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

As shown in FIG. 6, the wireless circuit 6 according to the present embodiment is configured to include an antenna tuner 66 instead of the antenna tuner 56 with respect to the wireless circuit 5 of the fifth embodiment. The antenna tuner 66 includes a low band antenna tuner 161, a high band antenna tuner 162, a filter 263, a filter 264, a filter 665, and a filter 666. The filter 665 and the filter 666 have the same configuration as the filter 263 and the filter 264, respectively, and thus description thereof is omitted.

The low-band antenna tuner 161 and the high-band antenna tuner 162 of the antenna tuner 66 are divided into two transmission signals output from the wireless FEM 11 through one (one system) transmission line (feed line). Input on the transmission line. The antenna tuner 66 combines the transmission signal output from the low-band antenna tuner 161 and passed through the filter 665 with the transmission signal output from the high-band antenna tuner 162 and passed through the filter 666. Output to. The combined transmission signal is input to the antenna 10.

According to the above configuration, it is possible to further improve the antenna characteristics when transmitting a plurality of transmission signals having different frequency bands at the same time.

In addition, the antenna 10 in Embodiment 5 and Embodiment 6 described above may be configured to include a plurality of antenna elements that operate in each frequency band, like the antenna 20.

[Specific Examples of Low Band Antenna Tuner 161 and High Band Antenna Tuner 162]
Next, specific examples of the low-band antenna tuner 161 and the high-band antenna tuner 162 according to the present invention will be described. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

FIG. 7 is a diagram illustrating an example of the low-band antenna tuner 161 according to the first to sixth embodiments. As shown in FIG. 7, the low-band antenna tuner 161 uses at least one of a variable inductor and a variable capacitor. The variable capacitor is used in series (series), and the variable inductor is used in shunt (parallel). ing. This can be expressed by 1 / (2π × frequency × L) where L is the inductance of the variable inductor, and the variable capacitor is expressed by 1 / (2π × frequency × C) where C is the capacitance. This is because the impedance matching with the antenna can be greatly adjusted when the frequency is low.

Next, a specific example of the high band antenna tuner 162 will be described. FIG. 8 is a diagram illustrating an example of the high band antenna tuner 162 according to the first to sixth embodiments. As shown in FIG. 8, at least one of a variable inductor and a variable capacitor is used for the high-band antenna tuner 162. The variable capacitor is used as a shunt and the variable inductor is used as a series. This can be expressed as 2π × frequency × C, where C is the capacitance of the variable capacitor, and can be expressed as 2π × frequency × L, where L is the inductance of the variable inductor. This is because impedance matching with the antenna can be greatly adjusted.

[Example of software implementation]
The control blocks (particularly the calculation unit 13 and the control unit 14) of the radio circuits 1 to 6 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or a CPU (Central Processing Unit). ) May be implemented by software.

In the latter case, the radio circuits 1 to 6 include a CPU that executes instructions of a program that is software that implements each function, and a ROM (Read Only Memory) in which the program and various data are recorded so as to be readable by the computer (or CPU). ) Or a storage device (these are referred to as “recording media”), a RAM (Random Access Memory) that expands the program, and the like. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

[Summary]
A radio circuit according to aspect 1 of the present invention is a radio circuit connected to an antenna, and a transmission signal output unit (radio FEM 11) that simultaneously outputs a plurality of transmission signals having different frequency bands on one transmission line; A plurality of variable matching means (low band antenna tuner 161, high band antenna tuner) provided for each frequency band corresponding to each of a plurality of transmission signals and independently adjusting impedance matching with the antenna in each frequency band. 162).

According to the above configuration, each of the plurality of variable matching means provided for each frequency band corresponding to each of the plurality of transmission signals includes a plurality of transmission signals having different frequency bands output simultaneously from the transmission signal output unit. Among them, the impedance matching with the antenna is independently adjusted for the transmission signal in the frequency band corresponding to the variable matching means. Thereby, the said radio | wireless circuit can adjust suitably impedance matching with an antenna in each frequency band. Therefore, the radio circuit can further improve the antenna characteristics when transmitting a plurality of transmission signals having different frequency bands at the same time.

The wireless circuit according to aspect 2 of the present invention is the wireless circuit according to aspect 1, in which the calculation means (calculation unit 13) that calculates an evaluation value for evaluating impedance matching with the antenna in each of the plurality of transmission signals, and the calculation Control means (antenna tuner control unit 141) for controlling the plurality of variable matching means so that impedance matching with the antenna in each of the plurality of transmission signals is improved according to each evaluation value calculated by the means; Are preferably provided.

According to the above configuration, the calculation unit calculates an evaluation value for evaluating impedance matching with the antenna in each of a plurality of transmission signals, and the control unit calculates the evaluation value calculated by the calculation unit. Accordingly, the plurality of variable matching means are controlled so that impedance matching with the antenna in each of the plurality of transmission signals is improved.

Therefore, the radio circuit can more suitably improve the antenna characteristics when transmitting a plurality of transmission signals having different frequency bands at the same time.

A wireless circuit according to aspect 3 of the present invention is the wireless circuit according to

aspect

1 or 2, wherein the antenna is provided with a plurality of antenna elements (low band antenna 201, provided for each frequency band corresponding to each of the plurality of transmission signals. High-band antenna 202), and each antenna element operates in a corresponding frequency band and is connected to the variable matching means for adjusting impedance matching with the antenna in the frequency band. It may be.

According to the above configuration, an antenna element that operates in a frequency band corresponding to each of a plurality of transmission signals is connected to the variable matching means that adjusts impedance matching with the antenna in each frequency band. Accordingly, each of the plurality of variable matching means adjusts impedance matching with an antenna element operating in a frequency band corresponding to the variable matching means. Thereby, the said radio | wireless circuit can improve more suitably the antenna characteristic at the time of transmitting simultaneously the several transmission signal from which a frequency band differs.

The wireless circuit according to aspect 4 of the present invention is the wireless circuit according to aspect 3, in which each variable matching unit is connected in series between the antenna element operating in the frequency band corresponding to the variable matching unit and the transmission signal output unit. A connected configuration may be used.

According to the above configuration, each of the plurality of variable matching means adjusts impedance matching with an antenna element connected in series to the variable matching means. Thereby, the said radio | wireless circuit can improve more suitably the antenna characteristic at the time of transmitting simultaneously the several transmission signal from which a frequency band differs.

The wireless circuit according to aspect 5 of the present invention is the wireless circuit according to aspects 1 to 4, wherein the wireless circuit is individually connected to each of the plurality of variable matching units between the transmission signal output unit and each of the plurality of variable matching units. A plurality of filters arranged so that each of the plurality of filters transmits a frequency band corresponding to a variable matching means connected to the filter among the plurality of transmission signals output from the transmission signal output unit. A configuration in which only a signal is allowed to pass may be used.

According to the above configuration, each of the plurality of filters arranged to be individually connected to each of the variable matching means is connected to the filter among the plurality of transmission signals output by the transmission signal output unit. Only the transmission signal in the frequency band corresponding to the variable matching means is passed. As a result, each of the plurality of variable matching means can more suitably adjust the impedance matching with the antenna in the frequency band corresponding to the variable matching means.

A wireless circuit according to aspect 6 of the present invention is the wireless circuit according to aspect 3, in which each variable matching unit branches from a transmission line that inputs the transmission signal to the antenna element that operates in a frequency band corresponding to the variable matching unit. It may be configured on a line connected to the ground.

According to the above configuration, each of the plurality of variable matching means adjusts impedance matching with the antenna element connected to the transmission line input to the variable matching means. Thereby, the said radio | wireless circuit can improve more suitably the antenna characteristic at the time of transmitting simultaneously the several transmission signal from which a frequency band differs.

The wireless circuit according to aspect 7 of the present invention is the wireless circuit according to

aspect

1 or 2, wherein each of the plurality of variable matching units branches from a transmission line that inputs a transmission signal to the antenna and is connected to the ground. Each may be configured.

A radio circuit according to an eighth aspect of the present invention is the wireless circuit according to the fifth aspect, wherein the plurality of radio circuits are individually connected between the antenna and each of the plurality of variable matching means. Each of the plurality of filters may be configured to pass only a transmission signal in a frequency band corresponding to the variable matching means connected to the filter.

The radio circuits 1 to 6 according to each aspect of the present invention may be realized by a computer. In this case, the radio circuits 1 to 6 are operated as computers provided in the radio circuits 1 to 6. The control programs for the radio circuits 1 to 6 realized by the above and the computer-readable recording medium on which the control programs are recorded also fall within the scope of the present invention.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

The present invention can be used in the field of manufacturing wireless devices.

1 to 6 Wireless circuit 10 Antenna 11 Wireless FEM (Transmission signal output unit)
12 signal extraction part 13 calculation part (calculation means)
14 Control Unit 141 Antenna Tuner Control Unit (Control Unit)
15 Memory 16 Antenna tuner 161 Low band antenna tuner (variable matching means)
162 High-band antenna tuner (variable matching means)
17 Judgment unit 20 Antenna 201 Low band antenna (antenna element)
202 High band antenna (antenna element)
26, 36, 46, 56 Antenna tuner 263 filter 264 filter 66 antenna tuner 665 filter 666 filter

Claims

A radio circuit connected to an antenna,
A transmission signal output unit for simultaneously outputting a plurality of transmission signals having different frequency bands on one transmission line;
A plurality of variable matching means provided for each frequency band corresponding to each of the plurality of transmission signals and independently adjusting impedance matching with the antenna in each frequency band; circuit.
Calculating means for calculating an evaluation value for evaluating impedance matching with the antenna in each of the plurality of transmission signals;
Control means for controlling the plurality of variable matching means so that impedance matching with the antenna in each of the plurality of transmission signals is improved according to each evaluation value calculated by the calculation means. The radio circuit according to claim 1.
The antenna includes a plurality of antenna elements provided for each frequency band corresponding to each of the plurality of transmission signals,
3. Each antenna element operates in a corresponding frequency band and is connected to the variable matching means for adjusting impedance matching with the antenna in the frequency band. Wireless circuit.
The variable matching means is connected in series between the antenna element operating in a frequency band corresponding to the variable matching means and the transmission signal output unit. Wireless circuit.
A plurality of filters arranged to be individually connected to each of the plurality of variable matching means between the transmission signal output unit and each of the plurality of variable matching means,
Each of the plurality of filters passes only a transmission signal in a frequency band corresponding to a variable matching unit connected to the filter among the plurality of transmission signals output from the transmission signal output unit. Item 5. The wireless circuit according to any one of Items 1 to 4.