KR102189697B1 - Hybrid beamforming radar system - Google Patents

Abstract

The present invention provides a power divider for distributing the power of a radar signal generated and transmitted from the radar signal generator to a first transmission channel and a second transmission channel, and for shifting the phase of the radar signal distributed by the power divider. A first transmission channel composed of a first phase shifter and a first variable gain amplifier that gradually adjusts an amplification gain while suppressing a phase change of the radar signal passing through the first phase shifter, and distributed by a power divider. A second transmission channel comprising a second phase shifter for shifting the phase of the radar signal, and a second variable gain amplifier for stepwise adjustment of amplification gain while suppressing a change in the phase of the radar signal passing through the second phase shifter. Including, the radar signal receiver generates a first I signal and a first Q signal by mixing the radar signal generated and transmitted from the radar signal generator and the received RF signal, and the generated first I signal and the first Q signal The first receiving channel filtering the intermediate frequency signal from and the radar signal receiving unit generates a second I signal and a second Q signal by mixing the radar signal generated and transmitted from the radar signal generator and the received RF signal, and generates A hybrid beamforming radar system is provided, comprising: a second receiving channel for filtering an intermediate frequency signal from the second I signal and the second Q signal.

Description

Hybrid beamforming radar system

The present invention relates to a hybrid beamforming radar system, and more particularly, a radar transmitting unit efficiently generates a high-power transmission signal by adopting a phase arrangement method composed of a plurality of channels, and the radar receiving unit generates an I signal in a plurality of receiving channels. And a hybrid beamforming radar system capable of parallel processing by generating and digitally processing a Q signal.

Due to the proliferation of ICT (Information and Communications Technologies) technology, research on beamforming radars related to 5G and autonomous vehicles has been actively conducted recently. In the case of the phased array-based analog beamforming method, the number of beamforming is limited. Beam formation is difficult, and digital beamforming can be processed in parallel, so multiple beams can be formed, but bandwidth limitations such as ADCs limit the implementation of high data transmission or high-resolution radar imaging systems.

Background art of the present invention is published in Korean Patent Application Publication No. 10-2012-0059972.

Accordingly, the present invention was conceived to solve the problems of the prior art, and the technical problem to be achieved by the present invention is that the radar transmitter adopts a phase arrangement method composed of a plurality of channels to efficiently generate a high-power transmission signal, and The receiving unit provides a hybrid beamforming radar system capable of parallel processing by generating I and Q signals in a plurality of receiving channels and processing them digitally.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. I will be able to.

In order to achieve the above object, the hybrid beamforming radar system according to an embodiment of the present invention includes a radar signal generator, a radar signal transmission unit including a first transmission channel and a second transmission channel, a first reception channel, and In the hybrid beamforming radar system including a radar signal receiving unit configured with a second receiving channel, the radar signal transmitting unit converts power of a radar signal generated and transmitted from the radar signal generator to the first transmission channel and the second transmission channel. A power divider for distribution to a transmission channel, a first phase shifter for shifting the phase of the radar signal distributed by the power divider, and amplification gain while suppressing a change in the phase of the radar signal passing through the first phase shifter. A first transmission channel comprising a first variable gain amplifier that is stepwise adjusted, a second phase shifter for shifting the phase of the radar signal distributed by the power divider, and a phase of the radar signal passing through the second phase shifter It includes a second transmission channel consisting of a second variable gain amplifier that adjusts the amplification gain stepwise while suppressing the change of the radar signal, the radar signal receiving unit is a radar signal generated and transmitted from the radar signal generator and received RF A first receiving channel for generating a first I signal and a first Q signal by mixing signals, filtering an intermediate frequency signal from the generated first I signal and the first Q signal, and the radar signal receiver generating the radar signal A second reception for generating a second I signal and a second Q signal by mixing the radar signal generated and transmitted from the unit and the received RF signal, and filtering the intermediate frequency signal from the generated second I signal and the second Q signal It characterized in that it includes a channel.

In the hybrid beamforming radar system according to an embodiment of the present invention, the power divider includes a 01th transmission line for transmitting power between a 0th transmission channel and a first transmission channel, the 0th transmission channel and a second transmission channel. The 02th transmission line for transmitting power between, the 10th and 20th isolation resistors disposed between the 01th transmission line and the 02th transmission line, and the 01th transmission line connected to the first transmission channel. A tenth switch disposed between an end and a ground to connect or disconnect an end of the 01th transmission line connected to the first transmission channel and a ground, and an end of the 02th transmission line connected to the second transmission channel And a twentieth switch to connect or disconnect an end of the 02th transmission line connected to the second transmission line and a ground, and disposed between the tenth isolation resistor and the twentyth isolation resistor, A 30th switch connecting or disconnecting the 10th isolation resistor and the 20th isolation resistor, the length of the 01th transmission line is lambda/4, and the length of the 02th transmission line is lambda/4, The characteristic impedance of the 0th transmission channel is Z0, the characteristic impedance of the first transmission channel is Z0, the characteristic impedance of the second transmission channel is Z0, the resistance value of the tenth isolation resistor is Z0, and the first transmission channel The resistance value of the 20 isolation resistor is Z0, and when operating in a mode for distributing power from the 0th transmission channel to the first transmission channel and the second transmission channel, the tenth switch is turned off, and the twentieth switch is turned off. The switch is turned off, and the 30th switch is turned on.

Z0)/2인 것을 특징으로 한다.In the hybrid beamforming radar system according to an embodiment of the present invention, the characteristic impedance of the 01th transmission line is (Z0 +

It is characterized in that Z0)/2.

Z0)/2인 것을 특징으로 한다.In the hybrid beamforming radar system according to an embodiment of the present invention, the characteristic impedance of the 02th transmission line is (Z0 +

It is characterized in that Z0)/2.

The hybrid beamforming radar system according to an embodiment of the present invention is characterized in that the tenth switch, the twentieth switch, or the thirty-th switch is a MOS transistor.

In the hybrid beamforming radar system according to an embodiment of the present invention, the power divider includes a 01th transmission line for transmitting power between a 0th transmission channel and a first transmission channel, the 0th transmission channel and a second transmission channel. The 02th transmission line for transmitting power between, the 10th and 20th isolation resistors disposed between the 01th transmission line and the 02th transmission line, and the 01th transmission line connected to the first transmission channel. A tenth switch disposed between an end and a ground to connect or disconnect an end of the 01th transmission line connected to the first transmission channel and a ground, and an end of the 02th transmission line connected to the second transmission channel And a twentieth switch to connect or disconnect an end of the 02th transmission line connected to the second transmission line and a ground, and disposed between the tenth isolation resistor and the twentyth isolation resistor, A 30th switch connecting or disconnecting the 10th isolation resistor and the 20th isolation resistor, the length of the 01th transmission line is lambda/4, and the length of the 02th transmission line is lambda/4, The characteristic impedance of the 0th transmission channel is Z0, the characteristic impedance of the first transmission channel is Z0, the characteristic impedance of the second transmission channel is Z0, the resistance value of the tenth isolation resistor is Z0, and the first transmission channel The resistance value of the 20 isolation resistor is Z0, and when operating in a mode in which power is transmitted only from the 0th transmission channel to the first transmission channel, the tenth switch is turned off, the twentieth switch is turned on, and the The 30th switch is characterized in that it is turned off.

In the hybrid beamforming radar system according to an embodiment of the present invention, the power divider includes a 01th transmission line for transmitting power between a 0th transmission channel and a first transmission channel, the 0th transmission channel and a second transmission channel. The 02th transmission line for transmitting power between, the 10th and 20th isolation resistors disposed between the 01th transmission line and the 02th transmission line, and the 01th transmission line connected to the first transmission channel. A tenth switch disposed between an end and a ground to connect or disconnect an end of the 01th transmission line connected to the first transmission channel and a ground, and an end of the 02th transmission line connected to the second transmission channel And a twentieth switch to connect or disconnect an end of the 02th transmission line connected to the second transmission line and a ground, and disposed between the tenth isolation resistor and the twentyth isolation resistor, A 30th switch connecting or disconnecting the 10th isolation resistor and the 20th isolation resistor, the length of the 01th transmission line is lambda/4, and the length of the 02th transmission line is lambda/4, The characteristic impedance of the 0th transmission channel is Z0, the characteristic impedance of the first transmission channel is Z0, the characteristic impedance of the second transmission channel is Z0, the resistance value of the tenth isolation resistor is Z0, and the first transmission channel The resistance value of the 20 isolation resistor is Z0, and when operating in a mode in which power is transmitted only from the 0th transmission channel to the second transmission channel, the tenth switch is turned on, the 20th switch is turned off, and the The 30th switch is characterized in that it is turned off.

In the hybrid beamforming radar system according to an embodiment of the present invention, the first variable gain amplifier or the second variable gain amplifier includes a 21st inductor connected to a power supply voltage, and a 22nd inductor connected in parallel to the 21st inductor. , An 11th MOS transistor amplifying an RF signal input to a positive input terminal, a 21st MOS transistor disposed between the 21st inductor and the 11th MOS transistor to adjust an amplification gain, and an RF input to the negative input terminal. A cascode amplification unit comprising a twelfth MOS transistor amplifying a signal, a 22nd MOS transistor disposed between the 22nd inductor and the twelfth MOS transistor to adjust an amplification gain, and the 11th MOS transistor and the twelfth It is disposed between the source and the ground of the MOS transistor, characterized in that it comprises a source resistance adjusting unit for attenuating the amplification gain of the cascode amplifying unit to 0dB, attenuated by 1dB, or attenuated by 2dB.

In the hybrid beamforming radar system according to an embodiment of the present invention, a 0dB attenuation switch enabled by a 0dB control signal by the source resistance adjusting unit is disposed between the source and the ground of the 11th MOS transistor and the 12 MOS transistor And a 1dB attenuation switch enabled by a 1dB control signal is connected to the ground, and a 1dB resistor is disposed between the source of the 11th MOS transistor and the 12th MOS transistor and the 1dB attenuation switch, and by a 2dB control signal An enabled 2dB attenuation switch is connected to the ground, and a 2dB resistor is disposed between the source of the eleventh MOS transistor and the twelfth MOS transistor and the 2dB attenuation switch.

The hybrid beamforming radar system according to an embodiment of the present invention is characterized in that the 0dB attenuation switch, the 1dB attenuation switch or the 2dB attenuation switch is a MOS transistor.

In the hybrid beamforming radar system according to an embodiment of the present invention, a 3dB attenuation switch in which the source resistance control unit is enabled by a 3dB control signal is further connected to the ground, and the eleventh MOS transistor and the twelfth MOS transistor It characterized in that a 3dB resistor is further disposed between the source of and the 3dB attenuation switch.

A hybrid beamforming radar system according to an embodiment of the present invention is characterized in that the 3dB attenuation switch is a MOS transistor.

In the hybrid beamforming radar system according to the embodiments of the present invention, the radar transmitter adopts a phased arrangement method consisting of a plurality of channels to efficiently generate a high-power transmission signal, and the radar receiver generates an I signal and a Q signal in multiple reception channels. By generating signals and processing them digitally, parallel processing is possible.

1 is a circuit diagram of a hybrid beamforming radar system according to an embodiment of the present invention.
2 is a circuit diagram of a power divider employed in a hybrid beamforming radar system according to an embodiment of the present invention.
3 is a circuit diagram of a variable gain amplifier employed in a hybrid beamforming radar system according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION The detailed description of the present invention to be described later refers to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. These embodiments are described in detail sufficient to enable a person skilled in the art to practice the present invention. It is to be understood that the various embodiments of the present invention are different from each other, but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention in relation to one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention.

Accordingly, the detailed description to be described below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scopes equivalent to those claimed by the claims. In the drawings, similar reference numerals refer to the same or similar functions over several aspects, and the length, area, thickness, and the like may be exaggerated and expressed for convenience.

1 is a circuit diagram of a hybrid beamforming radar system according to an embodiment of the present invention, FIG. 2 is a circuit diagram of a power divider employed in a hybrid beamforming radar system according to an embodiment of the present invention, and FIG. 3 is the present invention A circuit diagram of a variable gain amplifier employed in a hybrid beamforming radar system according to an embodiment of

A hybrid beamforming radar system according to an embodiment of the present invention is a radar composed of a radar signal generator 100, a first transmission channel TCH1 and a second transmission channel TCH2, as shown in FIG. It may be configured to include a signal transmission unit 200 and a radar signal reception unit 300 including a first reception channel RCH1 and a second reception channel RCH2.

The radar signal transmission unit 200 is a power divider 201 for distributing the power of the radar signal generated and transmitted from the radar signal generation unit 100 to the first transmission channel TCH1 and the second transmission channel TCH2. ), and the first phase shifter 211 for shifting the phase of the radar signal distributed by the power divider 201, and the change of the phase of the radar signal passing through the first phase shifter 211 A first transmission channel (TCH1) consisting of a first variable gain amplifier 212 that adjusts the amplification gain stepwise while suppressing, and a second phase shift for shifting the phase of the radar signal distributed by the power divider 201 A second transmission channel composed of a second variable gain amplifier 222 that gradually adjusts an amplification gain while suppressing a change in the phase of the radar signal passing through the second phase shifter 221 (TCH2).

The radar signal transmission unit 200 described above does not necessarily have to be configured with 2 channels, and may be configured in various ways such as 2 channels, 4 channels, 8 channels, or 16 channels, depending on the applied system.

As shown in FIG. 2, the power divider 201 is a 01th transmission line (T01) for transmitting power between a 0th transmission channel (TCH0) and a first transmission channel (TCH1), and the 0th transmission channel (TCH0). A tenth isolation resistor (R10) disposed between the 02th transmission line (T02), the 01th transmission line (T01), and the 02th transmission line (T02) for transmitting power between the and the second transmission channel (TCH2) And a twentieth isolation resistor R20, the first transmission line T01 connected to the first transmission channel TCH1 and an end of the first transmission line T01 and the ground, respectively, and connected to the first transmission channel TCH1. The 10th switch S10 connects or disconnects the end of the 01 transmission line T01 and the ground, and is disposed between the end and the ground of the 02th transmission line T02 connected to the second transmission channel TCH2. , A twentieth switch (S20) for connecting or disconnecting an end of the 02th transmission line (T02) connected to the second transmission channel (TCH2) and a ground, and the tenth isolation resistor (R10) and the twentieth isolation A 30th switch S30 is disposed between the resistors R20 to connect or disconnect the tenth isolation resistor R10 and the twentieth isolation resistor R20.

Here, the power divider 201 has a length of the 01th transmission line T01 being lambda/4, the length of the 02nd transmission line T02 being lambda/4, and the 0th transmission channel TCH0 The characteristic impedance is Z0, the characteristic impedance of the first transmission channel TCH1 is Z0, the characteristic impedance of the second transmission channel TCH2 is Z0, and the resistance value of the tenth isolation resistor R10 is Z0, and , The resistance value of the twentieth isolation resistor R20 is Z0.

On the other hand, when operating in a mode in which power is distributed from the 0th transmission channel TCH0 to the first transmission channel TCH1 and the second transmission channel TCH2, the tenth switch S10 is turned off. , The 20th switch S20 is turned off, and the 30th switch S30 is turned on.

Z0)/2이고, 상기 제 02 전송 선로(T02)의 특성 임피던스는 (Z0 +

Z0)/2이며, 상기 제 10 스위치(S10) 또는 상기 제 20 스위치(S20) 또는 상기 제 30 스위치(S30)는 모스트랜지스터로 구성된다.Here, the characteristic impedance of the 01th transmission line T01 is (Z0 +

Z0)/2, and the characteristic impedance of the 02th transmission line T02 is (Z0 +

Z0)/2, and the tenth switch S10, the twentieth switch S20, or the thirtyth switch S30 is constituted by a MOS transistor.

In addition, when operating in a mode in which power is transmitted only from the 0th transmission channel TCH0 to the first transmission channel TCH1, the tenth switch S10 is turned off, and the 20th switch S20 is It is turned on, and the 30th switch S30 is turned off.

In addition, when operating in a mode in which power is transmitted only from the 0th transmission channel TCH0 to the second transmission channel TCH2, the tenth switch S10 is turned on, and the twentieth switch S20 is turned on. The 30th switch S30 is turned off.

As shown in FIG. 3, the first variable gain amplifier 212 or the second variable gain amplifier 222 is connected in parallel to the 21st inductor L21 and the 21st inductor L21 connected to the power supply voltage. Arranged between the 22nd inductor (L22) and the 11th MOS transistor (T11) for amplifying the RF signal input to the positive input terminal (INp), and the 21st inductor (L21) and the 11th most transistor (T11) The 21st MOS transistor T21 is configured to adjust the amplification gain, the twelfth MOS transistor T12 amplifies the RF signal input to the negative input terminal INN, the 22nd inductor L22 and the twelfth MOS The cascode amplification unit 212_1 including a 22nd MOS transistor T22 disposed between the transistors T12 and controlling an amplification gain, and the source of the 11th MOS transistor T11 and the twelfth MOS transistor T12 It is disposed between the and ground, and includes a source resistance control unit 212_2 for attenuating the amplification gain of the cascode amplifying unit 212_1 by 0dB, 1dB, or attenuated by 2dB.

Here, the source resistance control unit 212_2 includes a 0dB attenuation switch T0 enabled by a 0dB control signal SW0dB between the sources of the eleventh MOS transistor T11 and the twelfth MOS transistor T12 A 1dB attenuation switch (T1) disposed between the grounds and enabled by a 1dB control signal (SW1dB) is connected to the ground, and the source of the 11th most transistor (T11) and the 12th most transistor (T12) and the A 1dB resistor R1 is disposed between the 1dB attenuating switch T1, and a 2dB attenuating switch T2 enabled by a 2dB control signal SW2dB is connected to the ground, and the eleventh MOS transistor T11 and the A 2dB resistor R2 is disposed between the source of the twelfth MOS transistor T12 and the 2dB attenuation switch T2.

Specifically, the 0dB attenuation switch T0, the 1dB attenuation switch T1, or the 2dB attenuation switch T2 is composed of a MOS transistor.

Here, the source resistance control unit 212_2 further has a 3dB attenuation switch T3 enabled by a 3dB control signal SW3dB connected to the ground, and the 11th MOS transistor T11 and the 12th MOS A 3dB resistor R3 is further disposed between the source of the transistor T12 and the 3dB attenuating switch T3, and the 3dB attenuating switch T3 is composed of a MOS transistor.

Meanwhile, the radar signal receiving unit 300 generates a first I signal and a first Q signal by mixing a radar signal generated and transmitted from the radar signal generating unit 100 and a received RF signal, and generates a first signal. A first receiving channel (RCH1) for filtering an intermediate frequency signal from the I signal and the first Q signal, and the radar signal receiving unit 300 is a radar signal generated and transmitted from the radar signal generator 100 and a received RF signal. And a second reception channel RCH2 for mixing signals to generate a second I signal and a second Q signal, and filtering an intermediate frequency signal from the generated second I and second Q signals.

The radar signal receiving unit 300 described above does not necessarily have to be configured with 2 channels, and may be configured in various ways such as 2 channels, 4 channels, 8 channels, or 16 channels, depending on the applied system.

As described above, the present invention has been described and illustrated in connection with a preferred embodiment for illustrating the principle of the present invention, but the present invention is not limited to the configuration and operation as illustrated and described as such.

Rather, it will be well understood by those skilled in the art that many changes and modifications may be made to the present invention without departing from the spirit and scope of the appended claims.

Accordingly, all such appropriate changes and modifications and equivalents should be considered to be within the scope of the present invention.

100: radar signal generator
200: radar signal transmitter
300: radar signal receiver

Claims (12)

A hybrid beamforming radar system comprising a radar signal generating unit, a radar signal transmitting unit composed of a first transmission channel and a second transmission channel, and a radar signal receiving unit composed of a first receiving channel and a second receiving channel,
The radar signal transmission unit divides the power of the radar signal generated and transmitted from the radar signal generator to the first transmission channel and the second transmission channel, and a phase of the radar signal distributed by the power divider. A first transmission channel comprising a first phase shifter that transitions, and a first variable gain amplifier that gradually adjusts an amplification gain while suppressing a phase change of the radar signal passing through the first phase shifter; and the power divider A second phase shifter that shifts the phase of the radar signal distributed by the second phase shifter, and a second variable gain amplifier that adjusts the amplification gain stepwise while suppressing a change in the phase of the radar signal passing through the second phase shifter. Including a second transmission channel,
The radar signal receiving unit generates a first I signal and a first Q signal by mixing a radar signal generated and transmitted from the radar signal generator and a received RF signal, and generates a first I signal and a first Q signal. A first receiving channel for filtering an intermediate frequency signal, and the radar signal receiving unit generates a second I signal and a second Q signal by mixing a radar signal generated and transmitted from the radar signal generator and a received RF signal, And a second receiving channel filtering the intermediate frequency signal from the generated second I signal and the second Q signal,
The first variable gain amplifier or the second variable gain amplifier,
A 21st inductor connected to the power supply voltage;
A 22nd inductor connected in parallel to the 21st inductor;
An 11th MOS transistor amplifying an RF signal input to a positive input terminal, a 21st MOS transistor disposed between the 21st inductor and the 11th MOS transistor to adjust an amplification gain, and an RF signal input to the negative input terminal A cascode amplifying unit comprising a twelfth MOS transistor for amplifying a λ, and a 22 nd MOS transistor disposed between the 22nd inductor and the twelfth MOS transistor to adjust amplification gain; And
It is disposed between the source and the ground of the eleventh MOS transistor and the twelfth MOS transistor, and includes a source resistance adjusting unit for attenuating the amplification gain of the cascode amplifying unit by 0dB, 1dB, or 2dB, and ,
The source resistance control unit has a 0dB attenuation switch enabled by a 0dB control signal disposed between the source and ground of the 11th MOS transistor and the 12th MOS transistor, and a 1dB attenuation switch enabled by a 1dB control signal. A 1dB resistor is disposed between the source of the eleventh MOS transistor and the twelfth most transistor and the 1dB attenuation switch, and a 2dB attenuation switch enabled by a 2dB control signal is connected to the ground, and the 11th MOS transistor A 2dB resistor is disposed between the MOS transistor and the source of the twelfth MOS transistor and the 2dB attenuation switch,
The source resistance control unit has a 3dB attenuation switch enabled by a 3dB control signal further connected to the ground, and a 3dB resistor is further disposed between the source of the 11th MOS transistor and the 12 MOS transistor and the 3dB attenuation switch. Hybrid beamforming radar system, characterized in that.
The method of claim 1, wherein the power divider,
A 01th transmission line for transmitting power between the 0th transmission channel and the first transmission channel;
A 02th transmission line for transmitting power between the 0th transmission channel and a second transmission channel;
A tenth isolation resistor and a twentieth isolation resistor disposed between the 01th transmission line and the 02th transmission line;
A tenth switch disposed between an end of the 01th transmission line connected to the first transmission channel and a ground, and connecting or disconnecting an end of the 01th transmission line connected to the first transmission channel and a ground;
A twentieth switch disposed between an end of the 02th transmission line connected to the second transmission channel and a ground, and connecting or disconnecting an end of the 02th transmission line connected to the second transmission channel and a ground; And
A 30th switch disposed between the 10th isolation resistor and the 20th isolation resistor to connect or disconnect the 10th isolation resistor and the 20th isolation resistor,
The length of the 01th transmission line is lambda/4, the length of the 02th transmission line is lambda/4, the characteristic impedance of the 0th transmission channel is Z0, and the characteristic impedance of the first transmission channel is Z0, The characteristic impedance of the second transmission channel is Z0, the resistance value of the tenth isolation resistor is Z0, and the resistance value of the 20th isolation resistor is Z0,
When operating in a mode in which power is distributed from the 0th transmission channel to the first transmission channel and the second transmission channel, the tenth switch is turned off, the 20th switch is turned off, and the 30th switch Hybrid beamforming radar system, characterized in that turned on.
The method according to claim 2,
The characteristic impedance of the 01th transmission line is (Z0 +

Hybrid beamforming radar system, characterized in that Z0)/2.
The method according to claim 2,
The characteristic impedance of the 02th transmission line is (Z0 +

Hybrid beamforming radar system, characterized in that Z0)/2.
The method according to claim 2,
The 10th switch, the 20th switch or the 30th switch is a hybrid beamforming radar system, characterized in that the most transistor.
The method of claim 1, wherein the power divider,
A 01th transmission line for transmitting power between the 0th transmission channel and the first transmission channel;
A 02th transmission line for transmitting power between the 0th transmission channel and a second transmission channel;
A tenth isolation resistor and a twentieth isolation resistor disposed between the 01th transmission line and the 02th transmission line;
A tenth switch disposed between an end of the 01th transmission line connected to the first transmission channel and a ground, and connecting or disconnecting an end of the 01th transmission line connected to the first transmission channel and a ground;
A twentieth switch disposed between an end of the 02th transmission line connected to the second transmission channel and a ground, and connecting or disconnecting an end of the 02th transmission line connected to the second transmission channel and a ground; And
A 30th switch disposed between the 10th isolation resistor and the 20th isolation resistor to connect or disconnect the 10th isolation resistor and the 20th isolation resistor,
The length of the 01th transmission line is lambda/4, the length of the 02th transmission line is lambda/4, the characteristic impedance of the 0th transmission channel is Z0, and the characteristic impedance of the first transmission channel is Z0, The characteristic impedance of the second transmission channel is Z0, the resistance value of the tenth isolation resistor is Z0, and the resistance value of the 20th isolation resistor is Z0,
When operating in a mode in which power is transmitted only from the 0th transmission channel to the first transmission channel, the tenth switch is turned off, the twentieth switch is turned on, and the 30th switch is turned off. Hybrid beamforming radar system.
The method of claim 1, wherein the power divider,
A 01th transmission line for transmitting power between the 0th transmission channel and the first transmission channel;
A 02th transmission line for transmitting power between the 0th transmission channel and a second transmission channel;
A tenth isolation resistor and a twentieth isolation resistor disposed between the 01th transmission line and the 02th transmission line;
A tenth switch disposed between an end of the 01th transmission line connected to the first transmission channel and a ground, and connecting or disconnecting an end of the 01th transmission line connected to the first transmission channel and a ground;
A twentieth switch disposed between an end of the 02th transmission line connected to the second transmission channel and a ground, and connecting or disconnecting an end of the 02th transmission line connected to the second transmission channel and a ground; And
A 30th switch disposed between the 10th isolation resistor and the 20th isolation resistor to connect or disconnect the 10th isolation resistor and the 20th isolation resistor,
The length of the 01th transmission line is lambda/4, the length of the 02th transmission line is lambda/4, the characteristic impedance of the 0th transmission channel is Z0, and the characteristic impedance of the first transmission channel is Z0, The characteristic impedance of the second transmission channel is Z0, the resistance value of the tenth isolation resistor is Z0, and the resistance value of the 20th isolation resistor is Z0,
When operating in a mode in which power is transmitted only from the 0th transmission channel to the second transmission channel, the tenth switch is turned on, the twentieth switch is turned off, and the 30th switch is turned off. Hybrid beamforming radar system.
delete delete The method according to claim 1,
The 0dB attenuation switch, the 1dB attenuation switch or the 2dB attenuation switch is a hybrid beamforming radar system, characterized in that the MOS transistor.
delete The method according to claim 1,
The 3dB attenuation switch is a hybrid beamforming radar system, characterized in that the MOS transistor.

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