US 12,019,153 B2
Dual-polarizaton radar
Sai Li, Shaoxing (CN); Kai Ning, Shaoxing (CN); Zhen Wang, Shaoxing (CN); and Huaicheng Cun, Shaoxing (CN)
Assigned to ZHEJIANG EASTONE WASHON TECHNOLOGY CO., LTD., Shaoxing (CN)
Appl. No. 17/420,664
Filed by ZHEJIANG EASTONE WASHON TECHNOLOGY CO., LTD., Shaoxing (CN)
PCT Filed Oct. 17, 2019, PCT No. PCT/CN2019/111716
§ 371(c)(1), (2) Date Jul. 2, 2021,
PCT Pub. No. WO2020/224191, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 201910366778.7 (CN), filed on May 5, 2019.
Prior Publication US 2022/0099827 A1, Mar. 31, 2022
Int. Cl. G01S 13/95 (2006.01); G01S 7/282 (2006.01)
CPC G01S 13/95 (2013.01) [G01S 7/282 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A dual-polarization radar, comprising: a transmission module (1), a receiving module (8), a transmit-receive switch module, an antenna (4) having a first polarization direction, and an antenna (6) having a second polarization direction; wherein:
the transmission module (1) is configured to transmit a first pulse signal and a second pulse signal having different radio frequencies;
the receiving module (8) is configured to receive a backscattered echo signal of the first pulse signal and the second pulse signal;
the transmit-receive switch module (2, 3, 5; 30, 50) is configured to transmit the first pulse signal to the antenna (4) having the first polarization direction, transmit the second pulse signal to the antenna (6) having the second polarization direction, and transmit an echo signal having the first polarization direction and an echo signal having the second polarization direction to the receiving module (8);
the antenna (4) having the first polarization direction is configured to transmit the first pulse signal and receive the echo signal having the first polarization direction;
the antenna (6) having the second polarization direction is configured to transmit the second pulse signal and receive the echo signal having the second polarization direction;
the dual-polarization radar further comprises: a signal synthesis module (7); and
the signal synthesis module (7) is configured to receive the echo signal having the first polarization direction and the echo signal having the second polarization direction, synthesize the echo signal having the first polarization direction and the echo signal having the second polarization direction as the backscattered echo signal, and transmit the backscattered echo signal to the receiving module (8);
wherein the transmission module (1) is configured to generate a pulse pair signal;
wherein the pulse pair signal comprises: two or more pulse pairs; and among the two or more pulse pairs, a pulse width of each pulse of a first pulse pair is greater than pulse widths of pulses of other pulse pairs;
each of the two or more pulse pairs is constituted by the first pulse signal and the second pulse signal having different radio frequencies and being immediately adjacent in time;
a time interval between the first pulse signal and the second pulse signal is not greater than the pulse width of each pulse;
the first pulse signal and the second pulse signal are alternately transmitted; and
the first pulse signal and the second pulse signal are respectively a horizontally polarized pulse and a vertically polarized pulse, or the first pulse signal and the second pulse signal are respectively a vertically polarized pulse and a horizontally polarized pulse.