TW201525514A - FMCW radar transmit-receive module containing power cancellation function - Google Patents

Abstract

This invention provides an FMCW radar transmit-receive module containing power cancellation function, which is a signal transmit-receive module applied to FMCW radar. The structure comprises signal amplification unit, signal reroute unit, signal sending unit, signal conditioning unit, and signal receiving unit. By using the radar transmit-receive module, signal wave generated by the radar module is amplified and rerouted into two signal waves. One signal wave is sent via antenna, and the other signal wave adjusts the phase, amplitude, and timing of the signal wave, so that the impact of radar antenna reflection echo can be reduced to scale down radar structure through signal wave power cancellation function.

Description

FMCW radar transceiver module with power cancellation

The invention relates to a signal transceiver module for FMCW radar, in more detail, in particular to a FMCW radar transceiver module with power cancellation.

With the continuous advancement of wireless communication technology, from the military radar, home antennas, to the popularization of portable communication products, the progress of wireless communication has become the mainstream of modern communication products.

The main purpose of the antenna is to transmit the signal of the communication equipment by radio wave. The transmission quality is related to the antenna structure design. The frequency modulated continuous wave radar (FMCW Radar) has been widely used in radar due to its low peak power. Altimeter, navigation radar, safety radar, and car collision avoidance radar systems. Please refer to FIG. 1 , which is a schematic diagram of a conventional single antenna FMCW radar structure. As shown in the figure, since the single antenna FMCW radar has only one antenna structure, the basic working mode of the FMCW radar is that the transmitted signal is also receiving the target echo. Since only a single antenna is used for signal transmission 11 and signal reception 12, the problem of isolation between signal transmission and reception occurs, and the sensitivity of the antenna is low and the detection distance is also short. To avoid the disadvantages of the single antenna FMCW structure described above, Adding an antenna receiving signal, as shown in Fig. 2, is a schematic diagram of a conventional dual-antenna FMCW radar structure. As shown in the figure, the antenna is used for radar signal reception, and the other antenna transmits radar signals, and the dual antenna FMCW structure is utilized. Performing a signal transmission 21-signal reception 22 to avoid interference when transmitting and receiving simultaneously, but using a dual-antenna FMCW radar, although there is The advantages of the description, but the size and weight of the transceiver antenna is also twice that of the single-antenna radar, the motor torque is also relatively improved, and the dual-antenna FMCW radar requires a large installation space. When the installation space is limited, the radar antenna is reduced. The size, and thus the antenna gain and angular accuracy are sacrificed, and the detection distance is thus shortened.

In view of the above disadvantages, the present invention provides a FMCW radar transceiver module with power cancellation, which is a method for reducing the reflected echo of a radar antenna by using a signal wave power cancellation method, and further reducing the radar structure of the radar structure. Module design method.

In view of the above disadvantages of the prior art, the main object of the present invention is to provide a FMCW radar transceiver module with power cancellation, which is a radar that utilizes signal wave power cancellation to reduce the influence of radar echoes and further reduce the radar structure. Transceiver module design.

Another object of the present invention is to provide a FMCW radar transceiver module with power cancellation, which achieves the echo power cancellation by changing the phase, angle and time of the signal wave.

In order to achieve the above object of the present invention, the present invention provides a FMCW radar transceiver module with power cancellation, which is a signal transceiver module for FMCW radar, and the structure thereof comprises a signal amplification unit, a signal distribution unit, and a signal transmission unit. The signal conditioning unit and the signal receiving unit amplify the signal wave generated by the radar module by the radar transceiver module, and divide the signal wave into two signal waves, wherein a signal wave is transmitted by the antenna transmission mode, and another A signal wave adjusts the phase angle, amplitude and time of the signal wave, and the power cancellation of the signal wave achieves the purpose of echo power cancellation, and further reduces the design of the radar transceiver module for reducing the radar structure.

3‧‧‧FMCW radar

S1‧‧‧ first signal wave

30‧‧‧FMCW Radar Transceiver Module with Power Cancellation

312‧‧‧Power Amplifier

31‧‧‧Signal amplification unit

32‧‧‧Signal shunting unit

33‧‧‧Signal sending unit

34‧‧‧Signal conditioning unit

11, 21‧‧‧ signal transmission

12, 22‧‧‧Signal reception

S3‧‧‧ third signal wave

321‧‧‧ Coupler

341‧‧‧ phase adjustment component

342‧‧‧Amplitude adjustment component

343‧‧‧Time adjustment components

35‧‧‧Signal receiving unit

311‧‧‧Drive Amplifier

S2‧‧‧second signal wave

S4‧‧‧fourth signal wave

S5‧‧‧ fifth signal wave

S6‧‧‧ Echo

Figure 1 is a schematic diagram of a conventional single-antenna FMCW radar structure.

Figure 2 is a schematic diagram of a conventional dual antenna FMCW radar structure.

Figure 3 is a FMCW radar transceiver module with power cancellation according to the present invention.

Figure 4 is a schematic diagram of each unit of the FMCW radar transceiver module with power cancellation according to the present invention.

The embodiments of the present invention are described below by way of specific examples, and those skilled in the art can understand the other advantages and advantages of the present invention from the disclosure.

Please refer to FIG. 3 , which is a schematic diagram of a FMCW radar transceiver module with power cancellation according to the present invention. As shown in the figure, the FMCW radar transceiver module 30 with power cancellation is used for the FMCW radar 3 . The signal transceiving module comprises: a signal amplifying unit 31, a signal diverting unit 32, a signal transmitting unit 33, a signal adjusting unit 34 and a signal receiving unit 35. When the FMCW radar 3 generates a first signal wave S1, the signal is amplified. The unit 31 receives the first signal wave S1, amplifies the power of the first signal wave S1, generates a second signal wave S2, and uses the signal shunting unit 32 to receive the second signal wave S2 to generate a third signal wave S3. And a fourth signal wave S4, wherein the third signal wave S3 is transmitted through the signal transmitting unit 33, and the fourth signal wave S4 is transmitted through the signal adjusting unit 34 to adjust the phase and time of the fourth signal wave S4, and Generating a fifth signal wave S5, receiving the echo S6 generated by the third signal wave S3 by the signal receiving unit 35, and canceling the fifth signal wave S5 and the echo S6 to reduce the influence of the radar echo. Further reduce the FM The purpose of the CW radar structure.

Please refer to FIG. 4 , which is a schematic diagram of each unit of the FMCW radar transceiver module with power cancellation according to the present invention. As shown, the signal amplifying unit 31 includes a driving amplifier 311 and a power amplifier 312. The driving amplifier 311 and the power amplifier 312 amplify the first signal wave generated by the FMCW radar to generate a second signal wave whose power is increased to 2 W, and the second signal wave is transmitted to the signal shunting unit 32, and the signal is shunted. The unit 32 is a (-6dB) coupler 321 , and the second signal wave is divided into third and fourth signal waves by a ratio of 3:1 through the coupler 321 , wherein the third signal wave is transmitted through the signal. The signal transmitting unit 33 is a circulator 331. The fourth signal wave is adjusted by the signal adjusting unit 34 to adjust the phase, the phase angle and the time. The signal adjusting unit 34 includes a phase adjusting component. 341 (Φ-Adj.), amplitude adjusting component 342 (Amp Adj.) and time adjusting component 343, the time adjusting component 343 is a delay line, and the third signal wave is generated by the signal receiving unit 35. The echo, and the fifth signal wave is cancelled by the echo, reducing the influence of the radar echo, and further reducing the structure of the FMCW radar.

The above-described embodiments are merely illustrative of the features and functions of the present invention, and are not intended to limit the scope of the technical content of the present invention. Any person skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this creation should be as listed in the scope of the patent application described later.

3‧‧‧FMCW radar

30‧‧‧FMCW Radar Transceiver Module with Power Cancellation

31‧‧‧Signal amplification unit

32‧‧‧Signal shunting unit

33‧‧‧Signal sending unit

34‧‧‧Signal conditioning unit

35‧‧‧Signal receiving unit

311‧‧‧Drive Amplifier

312‧‧‧Power Amplifier

321‧‧‧ Coupler

341‧‧‧ phase adjustment component

342‧‧‧Amplitude adjustment component

343‧‧‧Time adjustment components

S1‧‧‧ first signal wave

S2‧‧‧second signal wave

S3‧‧‧ third signal wave

S4‧‧‧fourth signal wave

S5‧‧‧ fifth signal wave

S6‧‧‧ Echo

Claims (8)

A FMCW radar transceiver module with power cancellation is a signal transceiver module for FMCW radar, and the structure thereof comprises: a signal amplification unit, receiving a first signal wave generated by the radar, and amplifying the first signal wave And generating a second signal wave; the signal shunting unit receives the second signal wave to generate a third signal wave and the fourth signal wave; the signal transmitting unit receives the three signal wave and transmits the third signal wave The signal adjusting unit receives the fourth signal wave, adjusts the phase and time of the fourth signal to generate a fifth signal wave, and the signal receiving unit receives the echo generated by the third signal wave, and the fifth signal wave Eliminate the echo, reduce the impact of the radar echo, and further reduce the radar structure. The power canceling FMCW radar transceiver module according to claim 1, wherein the signal amplifying unit comprises a driving amplifier and a power amplifier. The power canceling FMCW radar transceiver module according to claim 1, wherein the signal splitting unit is a coupler. The FMCW radar transceiver module with power cancellation as described in claim 1, wherein the signal transmitting unit is a circulator. The power canceling FMCW radar transceiver module according to claim 1, wherein the signal adjusting unit comprises a phase adjusting component (Φ-Adj.), an amplitude adjusting component (Amp Adj.), and a time adjustment. element. The power canceling FMCW radar transceiver module according to claim 1, wherein the signal receiving unit is a coupler. The FMCW radar transceiver module with power cancellation according to claim 3, wherein the third signal wave and the fourth signal wave have a strength ratio of 3 to 1. The FMCW radar transceiver module with power cancellation as described in claim 5, wherein the time adjustment component is a delay line.