JP2004236011A - Antenna device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize and make light weight the entire antenna device having a shared opening surface of an antenna. <P>SOLUTION: The antenna device adds desired delay to a reference trigger of transmission and reception switching to control transmitting and receiving timing of a transmitting and receiving module and controls in/out timing of a direct current power supply for feeding power to the transmitting and receiving module at the same time to thereby reduce an average value of consumption current of the transmitting and receiving module. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device having a transmission duty with a large variation width by sharing the antennas of a plurality of different radio wave sensors such as a radar and a missile illuminator, and is applied to, for example, a phased array antenna.
[0002]
[Prior art]
A conventional phased array antenna is an element antenna for both transmission and reception, a transmission / reception module for amplifying an RF signal, a power supply circuit for distributing or synthesizing an RF signal, a transmission / reception switch for switching between transmission and reception of an RF signal, and an RF signal for transmission. And a control unit that controls the transmission phase shift of the phase shifter built in the transmission / reception module and the switching operation of the transmission / reception switcher. (For example, see Patent Document 1).
[0003]
There is also known a phased array antenna that divides an element antenna and a feed circuit into a plurality of regions and selects them with a changeover switch to change a beam width (for example, see Patent Document 2).
[0004]
[Patent Document 1]
JP 2001-264413 A (FIG. 3)
[Patent Document 2]
JP 2001-94330 A (FIG. 1)
[0005]
[Problems to be solved by the invention]
When the illuminator for transmitting a continuous wave and the radar for transmitting a pulse wave are used in common, it is necessary to provide an AC / DC converter and power supply wiring for transmitting the continuous wave, which consumes a large amount of current in the transmitting and receiving module. There is a problem that the volume and mass of the entire phased array antenna increase.
[0006]
Further, when the power of the transmission RF signal is reduced when irradiating a target at a short distance with the illuminator, there is a problem that the transmission efficiency is reduced because the high output amplifier of the transmission / reception module cannot be used in the saturation region.
[0007]
In Patent Document 1, an AC / DC (Alternating Current to Direct Current) converter that supplies DC power to a transmission / reception module is not disclosed as a self-evident component. Further, Patent Document 2 does not mention means for supplying DC power to the transmission / reception module and its problems, and does not disclose these problems.
[0008]
The present invention has been made to solve such a problem, and an object of the present invention is to reduce the size and weight of an entire antenna device that shares an antenna opening surface.
[0009]
[Means for Solving the Problems]
An antenna device according to the present invention includes a plurality of element antennas, a power supply circuit that distributes a plurality of transmission signals at the time of transmission, and combines power of a reception signal at the time of reception, and an AC / DC converter that converts an AC current to a DC current. A plurality of power switches for turning on / off the DC current output from the AC / DC converter, and turning on / off timings of the power switches so as to turn on some of the power switches and turn off other power switches. At the same time, the power switch is divided into a plurality of groups, and a power switch controller for controlling the timing of turning on and off the power switch so that any one of the groups is turned on. Each of the transmission signals applied and distributed by the power supply circuit is power-amplified and phase-shifted, and is output to the element antenna or received. A plurality of transmitting / receiving modules for amplifying signals and outputting the signals to the power supply circuit, a plurality of RF switches for switching the transmitting / receiving operation of the transmitting / receiving module or the presence / absence of transmission power supply, and switching some of the RF switches to transmission timing. And controlling the transmission / reception switching of the RF switch so as to switch the other RF switch to the reception timing, divides the RF switch into a plurality of groups, and controls the RF switch so that one of the groups is at the transmission timing. An RF switch controller for controlling the transmission / reception switching timing of the power supply switch for turning on / off the switching controller, and a transmission / reception module for transmitting / receiving the transmission / reception switching timing of the RF switch controller. As shown, the switch controller's on / off timing In which transmission and reception switching timing of the RF switch controller has been set.
[0010]
Further, a desired delay is added to the reference trigger signal for transmission / reception switching, and at the same time, the DC power of the transmission / reception module is turned on / off to reduce the average value of the current consumption.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a block diagram showing Embodiment 1 of the antenna device according to the present invention. FIG. 1 shows an example of a phased array antenna as a radar for transmitting a pulse wave, and its configuration and operation will be described below.
[0012]
The element antenna 1 radiates a transmission RF signal output from the transmission / reception module 2 to a space at the time of transmission, converts an incoming wave into a reception RF signal at the time of reception, and outputs the RF signal to the transmission / reception module 2. As shown in the detailed block diagram of FIG. 2, the transmission / reception module 2 changes the phase of the transmission RF signal output from the power supply circuit 8 according to the phase shift data output from the phase shift operation unit 12 during transmission. After that, the power is amplified by the high power amplifier 18 via the first RF switch 17, and the amplified transmission RF signal is output to the element antenna 1 via the second RF switch 19.
[0013]
The transmission / reception module 2 at the time of reception outputs the reception RF signal input from the element antenna 1 to the low noise amplifier 20 via the second RF switch 19, and after adding power amplification thereto, sets the first RF switch 17 to Then, the signal is output to the phase shifter 16. The phase shifter 16 changes the phase of the amplified received RF signal and outputs the received RF signal to the power supply circuit 8.
[0014]
The switching between the first RF switch 17 and the second RF switch 19 is based on a trigger signal output from the delay controller 4. The trigger signal input to the transmission / reception module 2 is obtained by adding a desired delay by the delay controller 4 to the reference trigger signal input from the trigger input terminal 3. As a result, each RF switch operates so as to cause the transmitting / receiving module 2 to perform a transmitting operation or supply transmission power. The AC / DC converter 10 converts the AC power input from the power terminal 9 into a DC power and outputs the DC power to the power switch 13. The power switch 13 controls on / off of the DC power from the AC / DC converter 10 to output the DC power to the high-power amplifier 18 when the power is on, and to output the DC power to the high-power amplifier 18 when the power is off. do not do.
[0015]
The power switch 13 turns on and off the DC power supply in accordance with the mode number input from the mode input terminal 14 by using an on / off signal generated by the switch controller 15. On the other hand, the transmission / reception switch 7 outputs the transmission RF signal input from the RF input terminal 5 to the power supply circuit 8 at the time of transmission, and outputs the reception RF signal input from the power supply circuit 8 to the RF output terminal 6 at the time of reception. The power supply circuit 8 distributes the transmission RF signal output by the transmission / reception switch 7 at the time of transmission to the transmission / reception module 2, and combines the reception RF signal output by the transmission / reception module 2 at the time of reception and outputs the combined signal to the transmission / reception switch 7. The switch controller 15 for the power supply controls on / off timing of the power switch 13 so that some power switches 13 are turned on and other power switches 13 are turned off. , And the ON / OFF timing of the power switch 13 is controlled so that any one of the groups is turned ON.
[0016]
Next, the operation when the phased array antenna is used as the illuminator for transmitting the continuous wave is the same as that at the time of transmitting the above-mentioned radar, but here, further, using FIG. 3, the delay controller 4 and the switch controller 15 will be described in detail. In this description, an example in which the transmission / reception switch 7 is in continuous transmission timing will be described.
[0017]
FIG. 3 shows a reference trigger signal input from the trigger input terminal 3, a mode number input from the mode input terminal 14, a trigger signal output from the delay controller 4, and an on / off signal output from the switch controller 15. 5 is a time chart showing timing and transmission / reception switching timing of a transmission RF signal output by the transmission / reception module 2.
[0018]
The figure shows an example in which a continuous wave is divided into a U phase, a V phase, and a W phase. The trigger signal U phase is a signal that does not add a delay to the reference trigger signal. The trigger signal V phase is a signal delayed so that transmission starts when the transmission section of the trigger signal U phase ends. The trigger signal W-phase is a signal delayed so that transmission starts when the transmission section of the trigger signal V-phase ends.
[0019]
The reception interval of the reference trigger signal is set to be twice the transmission interval so that the transmission of the trigger signal U-phase starts at the end of the transmission interval of the trigger signal W-phase. This transmission section corresponds to transmission timing, and the reception section corresponds to non-transmission timing. The ON / OFF signal U-phase is in the ON state when the mode number is U-phase, and is OFF when the mode number is V-phase and W-phase. The ON / OFF signal V phase is in the ON state when the mode number is V phase, and is OFF when the mode number is U phase and W phase. The ON / OFF signal W phase is in the ON state when the mode number is the W phase, and is in the OFF state when the mode number is the U and V phases.
[0020]
That is, in the plurality of first RF switches 17 and the plurality of second RF switches 19, some of the RF switches are switched to the transmission timing, and the other RF switches are switched to the reception timing. The RF switch is divided into a plurality of groups, and the delay controller 4 controls the delay of the reference trigger signal so that one of the groups becomes the transmission timing. Control. Therefore, the delay controller 4 functions as an RF switch controller. The on / off timing of the switch controller and the transmission / reception switching timing functioning as transmission by the reference trigger signal delayed by the delay controller 4 are synchronized, and the corresponding switch controller is turned on, and the corresponding transmission / reception module transmits and receives. It is set to be.
[0021]
Here, the combination of whether the transmission / reception module 2 is in the operation state or the non-operation state is divided into the case where the mode number is the U-phase, the V-phase, and the W-phase, respectively, and FIG. 4 (a), FIG. It is shown in FIG. In the U-phase, V-phase, and W-phase, each one-third of the transmitting / receiving modules 2 is in an operating state, that is, the transmitting antenna 2 emits a transmission RF signal. The transmitting / receiving module 2 which is operating when the mode number is U-phase radiates from the element antenna 1 at the U-phase timing of the transmission RF signal in FIG. Similarly, when the mode number is the V-phase, radiation is performed from the element antenna 1 at the timing of the transmission RF signal V-phase, and when the mode number is the W-phase, radiation is performed from the element antenna 1 at the timing of the transmission RF signal W-phase. Can transmit a continuous wave. As described above, the transmission / reception module 2 is divided into three groups corresponding to the U phase, the V phase, and the W phase, respectively, and operates so that each group transmits a transmission signal in order.
[0022]
The element antenna 1 and the transmission / reception module 2 are divided into three groups, and the above-described phased array antenna that performs time-division transmission from each group, and continuous waves are transmitted from the element antenna 1 and the transmission / reception module 2 that are １ ／ of the total. Compared with the conventional phased array antenna, the former has higher transmission power. This is because operating the transmission / reception module 2 while switching between transmission and reception suppresses heat generation of the high-output amplifier 18 and improves efficiency, as compared with transmission of a continuous wave. Conversely, this means that an AC / DC converter with a smaller power supply capacity can be used to obtain the same transmission power. Further, the average value of the current of the DC power supply supplied to the transmitting / receiving module 2 can be suppressed to 1/3 of the conventional value. Therefore, the average current flowing through the wiring is reduced by that amount, and the volume and mass of the power supply wiring can be reduced.
[0023]
In this embodiment, a plurality of element antennas 1, a power supply circuit 8 for distributing a plurality of transmission signals at the time of transmission, and synthesizing a reception signal at the time of reception, and an AC / DC converter 10 for converting an AC current to a DC current And a plurality of power switches 13 for turning on / off the DC current output from the AC / DC converter 10, and turning on / off the power switches 13 so that some power switches 13 are turned on and other power switches 13 are turned off. A power switch 13 for controlling the timing, controlling the timing of turning on / off the power switch 13 such that one of the groups is turned on, and the power switch 13 is divided into a plurality of groups; 13 is applied, and the transmission signals distributed by the power supply circuit 8 are respectively amplified in power and phase-shifted to be output to the element antenna 1. Or a plurality of transmitting / receiving modules 2 for amplifying a received signal and outputting the amplified signals to the power supply circuit 5; a plurality of RF switches for switching the transmitting / receiving operation of the transmitting / receiving module 2 or the presence / absence of transmission power supply; Controlling the transmission and reception of the RF switch so as to switch the timing to another RF switch to the reception timing and dividing the RF switch into a plurality of groups so that any one of the groups is at the transmission timing. The power switch 13 includes an ON / OFF timing of the switch controller 15 and a transmission / reception module 2 that transmits / receives the transmission / reception switching timing of the delay controller 4. As shown in the figure, the ON / OFF timing of the switch controller 15 and the transmission / reception of the delay controller 4 By setting the switching timing, it is possible to reduce the average value of the DC power supplied to the transmission / reception module and reduce the volume and mass of the entire phased array antenna as compared with the conventional phased array antenna sharing the aperture. it can.
[0024]
Embodiment 2 FIG.
FIG. 5 is a block diagram showing Embodiment 2 of the antenna according to the present invention. First, an operation when the phased array antenna according to the second embodiment is used as a radar for transmitting a pulse wave will be described with reference to FIG. The element antenna 1 radiates a transmission RF signal output from the transmission / reception module 2 to a space at the time of transmission, converts an incoming wave into a reception RF signal at the time of reception, and outputs the RF signal to the transmission / reception module 2. As shown in the detailed block diagram of FIG. 6, the transmission / reception module 2 changes the phase of the transmission RF signal output from the power supply circuit 8 according to the phase shift data output by the phase shift calculator 12, The power is amplified by the high power amplifier 18 via the first RF switch 17, and the amplified transmission RF signal is output to the element antenna 1 via the second RF switch 19. The transmission / reception module 2 at the time of reception applies the power of the received RF signal input from the element antenna 1 via the second RF switch 19 and the low-noise amplifier 20, and then transfers the signal via the first RF switch 17. The phase is changed by the phaser 16, and the amplified received RF signal is output to the power supply circuit 8.
[0025]
The switching between the first RF switch 17 and the second RF switch 19 is based on a reference trigger signal input from the trigger input terminal 3. Further, the DC power of the high-output amplifier 18 is supplied after the AC power input from the power terminal 9 is converted to the DC power by the AC / DC converter 10, and then turned on and off by the power switch 13. The power switch 13 turns on and off the DC power supply according to the on / off signal generated by the switch controller 15 in accordance with the mode number input from the mode input terminal 14. On the other hand, the transmission / reception switch 7 outputs the transmission RF signal input from the RF input terminal 5 to the power supply circuit 8 at the time of transmission, and outputs the reception RF signal input from the power supply circuit 8 to the RF output terminal 6 at the time of reception. The power supply circuit 8 distributes the transmission RF signal output by the transmission / reception switch 7 at the time of transmission to the transmission / reception module 2, and combines the reception RF signal output by the transmission / reception module 2 at the time of reception and outputs the combined signal to the transmission / reception switch 7. The switch controller 15 controls the on / off timing of the power switch 13 so that some of the power switches 13 are turned on and the other power switches 13 are turned off, and the power switch 13 is divided into a plurality of groups, The on / off timing of the power switch 13 is controlled so as to change the number of groups in which the power switch 13 is turned on.
[0026]
Next, an operation when the phased array antenna according to the second embodiment is used as an illuminator for transmitting a continuous wave will be described. Since the dynamic range of the receiver mounted on the missile is finite, it is desirable that the transmission power of the illuminator can be controlled according to the distance of the irradiation target. Furthermore, in order to irradiate a plurality of targets in a time-division manner with a single illuminator, it is necessary to switch the transmission direction and the transmission power at intervals of several ms. Since the switching of the transmission direction is the same operation as the conventional phased array antenna, the operation of the switch controller 15 when changing the transmission power will be described in detail here.
[0027]
FIG. 7 shows a reference trigger signal input from the trigger input terminal 3, a mode number input from the mode input terminal 14, an on / off signal output by the switch controller 15, and a transmission RF signal output by the transmission / reception module 2. It is a time chart. Note that the figure shows an example in which the transmission power is changed in three stages of a large power mode, a medium power mode, and a small power mode. The large power mode is a mode used when irradiating a long distance target, a medium power target is applied to an intermediate distance target, and a small power target is used to irradiate a short distance target.
[0028]
The ON / OFF signal A phase is in the ON state when the mode number is transmitted with high power, medium power, and low power. The ON / OFF signal B phase is in the ON state when transmitting the mode power with high power and medium power, and is in the OFF state when transmitting low power. The on / off signal C phase is in the ON state when the mode number is transmitting high power, and is in the OFF state when transmitting medium power and low power. Here, the combination of whether the transmission / reception module 2 is in the operating state or the non-operating state is divided into cases where the mode numbers are high power, medium power, and low power, respectively, as shown in FIGS. As shown in FIG.
[0029]
At the time of transmission in the high power mode, it indicates that all the transmission / reception modules 2 are in the operating state, that is, the transmission RF signal is radiated from the element antenna 1. At the time of transmission in the medium power mode, only the transmission / reception module 2 except the outer ring portion of the antenna opening surface to which the on / off signal A phase and the on / off signal B phase are supplied is in the transmission / reception module 2, and the on / off signal C The transmitting / receiving module 2 in the outer ring portion of the antenna opening surface to which the phase is supplied is in a non-operating state. At the time of transmission in the low power mode, only the transmission / reception module 2 at the center of the antenna opening surface to which the on / off signal A phase is supplied in the transmission / reception module 2 operates, and the on / off signal B phase and the on / off signal C phase are changed to The supplied transmission / reception module 2 becomes inactive. Thus, by turning on and off the DC power supply of the transmitting / receiving module 2, the transmission power of the entire phased array antenna can be changed.
[0030]
The element antenna 1 and the transmission / reception module 2 are divided into three groups, and when comparing the above-described phased array antenna for turning on / off the DC power and the conventional phased array antenna for changing the power of the input RF signal, the former is larger. The transmission power is obtained. This is because the transmission efficiency is higher when the high-output amplifier 18 built in the transmission / reception module 2 is used in the saturation region than in the linear region. Conversely, this means that an AC / DC converter with a smaller power supply capacity can be used to obtain the same transmission power. Further, since the average value of the current of the DC power supply supplied to the transmission / reception module 2 is reduced, the volume and mass of the power supply wiring can be reduced correspondingly.
[0031]
In this embodiment, a plurality of element antennas 1, a power supply circuit 8 for distributing a plurality of transmission signals at the time of transmission, and synthesizing a reception signal at the time of reception, and an AC / DC converter 10 for converting an AC current to a DC current And a plurality of power switches 13 for turning on / off the DC current output from the AC / DC converter 10, and turning on / off the power switches 13 so that some power switches 13 are turned on and other power switches 13 are turned off. A power switch controller 15 that controls the timing of turning on and off the power switch 13 so as to control the timing, divide the power switch 13 into a plurality of groups, and change the number of groups in which the power switch 13 is turned on; The output current from the power switch 13 is applied to each of the element antennas, and the transmission signals distributed by the power supply circuit are power-amplified and phase-shift-controlled, respectively. Or a plurality of RF modules for amplifying a received signal and outputting the amplified signal to the power supply circuit 8, respectively, and a plurality of RF switches for switching the transmitting / receiving operation of the transmitting / receiving module 2 or the presence / absence of transmission power supply. This makes it possible to reduce the average value of the DC power supplied to the transmission / reception module as compared with the conventional antenna device sharing the aperture, and to reduce, for example, the volume and mass of the entire phased array antenna.
[0032]
【The invention's effect】
According to the present invention, it is possible to reduce the average value of the DC power supply supplied to the transmission / reception module as compared with the conventional antenna device sharing the aperture, and to reduce, for example, the volume and mass of the entire phased array antenna.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an antenna device according to a first embodiment of the present invention.
FIG. 2 is a detailed block diagram showing an internal configuration and an external connection of a transmitting / receiving module according to the first embodiment.
FIG. 3 is a diagram showing a time chart when a continuous wave is transmitted.
FIG. 4 is a diagram showing a correspondence between a mode number and a combination of an operating state or a non-operating state of the transmitting / receiving module in the first embodiment.
FIG. 5 is a block diagram showing an antenna device according to a second embodiment of the present invention.
FIG. 6 is a detailed block diagram showing an internal configuration and an external connection of a transmission / reception module according to the second embodiment.
FIG. 7 is a diagram showing a time chart when transmission power is changed.
FIG. 8 is a diagram showing a correspondence between a combination of an operating state or a non-operating state of a transmitting / receiving module and a mode number in the second embodiment.
[Explanation of symbols]
1 element antenna, 2 transmission / reception module, 3 trigger input terminal, 4 delay controller, 5 RF input terminal, 6 RF output terminal, 7 transmission / reception switch, 8 power supply circuit, 9 power supply terminal, 10 AC / DC converter, 11 data Input terminal, 12 phase shift calculator, 13 power switch, 14 mode input terminal, 15 switch controller, 16 phase shifter, 17 first RF switch, 18 high power amplifier, 19 second RF switch, 20 low noise amplifier.

Claims (4)

A plurality of element antennas,
A power supply circuit for distributing to a plurality of transmission signals at the time of transmission and power combining the reception signals at the time of reception;
An AC / DC converter for converting an alternating current into a direct current,
A plurality of power switches for turning on and off the DC current output from the AC / DC converter;
The on / off timing of the power switch is controlled so that some of the power switches are turned on and the other power switches are turned off, and the power switch is divided into a plurality of groups, and any one of the groups is turned on. A power switch controller for controlling the on / off timing of the power switch,
The output currents from the power switches are respectively applied, and the transmission signals distributed by the power supply circuit are respectively power-amplified and phase-shifted and output to the element antennas respectively, or the reception signals are amplified and the power is supplied to the element antennas. A plurality of transmitting and receiving modules each outputting to the circuit,
A plurality of RF switches for respectively switching the transmission / reception operation of the transmission / reception module or the presence / absence of transmission power supply,
The transmission / reception switching of the RF switches is controlled so that some of the RF switches are switched to the transmission timing and the other RF switches are switched to the reception timing, and the RF switches are divided into a plurality of groups, and any one of the groups is selected. And an RF switch controller for controlling transmission / reception switching timing of the RF switch, so that
The on / off timing of the switch controller and the transmission / reception module in which the transmission / reception switching timing of the RF switch controller is transmitted are associated with the power switch in which the on / off timing of the switch controller is on. An antenna device wherein transmission / reception switching timing of an RF switch controller is set. A plurality of element antennas,
A power supply circuit for distributing to a plurality of transmission signals at the time of transmission and power combining the reception signals at the time of reception;
An AC / DC converter for converting an alternating current into a direct current,
A plurality of power switches for turning on and off the DC current output from the AC / DC converter;
A power switch is turned on and off so that some of the power switches are turned on and the other power switches are turned off, and the power switches are divided into a plurality of groups, and a group in which the power switches are turned on. A power switch controller for controlling the on / off timing of the power switch so as to change the number;
The output currents from the power switches are respectively applied, and the transmission signals distributed by the power supply circuit are respectively power-amplified and phase-shifted and output to the element antennas respectively, or the reception signals are amplified and the power is supplied to the element antennas. A plurality of transmitting and receiving modules each outputting to the circuit,
An antenna device, comprising: a plurality of RF switches for switching transmission / reception operations of the transmission / reception module or supply / reception of transmission power. A plurality of element antennas,
A power supply circuit for distributing to a plurality of transmission signals at the time of transmission and power combining the reception signals at the time of reception;
An AC / DC converter for converting an alternating current into a direct current,
A plurality of power switches for turning on and off the DC current output from the AC / DC converter;
The output currents from the power switches are respectively applied, and the transmission signals distributed by the power supply circuit are respectively power-amplified and phase-shifted and output to the element antennas respectively, or the reception signals are amplified and the power is supplied to the element antennas. A plurality of transmitting and receiving modules each outputting to the circuit,
A mode input terminal for externally inputting a mode number for selecting a combination of the transmitting / receiving module in an operation state and a non-operation state;
A power switch controller that controls the on / off timing of the power switch according to the mode number;
A trigger input terminal for externally inputting a reference trigger signal for transmission / reception switching,
A delay controller for adding a delay to the reference trigger signal;
A plurality of RF switches for respectively switching transmission and reception operations of the transmission and reception module according to the reference trigger signal delayed by the delay controller;
An antenna device comprising: A plurality of element antennas,
A power supply circuit for distributing to a plurality of transmission signals at the time of transmission and power combining the reception signals at the time of reception;
An AC / DC converter for converting an alternating current into a direct current,
A plurality of power switches for turning on and off the DC current output from the AC / DC converter;
The output currents from the power switches are respectively applied, and the transmission signals distributed by the power supply circuit are respectively power-amplified and phase-shifted and output to the element antennas respectively, or the reception signals are amplified and the power is supplied to the element antennas. A plurality of transmitting and receiving modules each outputting to the circuit,
A mode input terminal for externally inputting a mode number for selecting a combination of the transmitting / receiving module in an operation state and a non-operation state;
A power switch controller that controls the on / off timing of the power switch according to the mode number;
A trigger input terminal for externally inputting a reference trigger signal for transmission / reception switching,
A plurality of RF switches for respectively switching transmission and reception operations of the transmission and reception module according to the reference trigger signal;
An antenna device comprising:

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