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Side-lobe cancellation method of S-band receiver for radar interference

A radar interference and receiver technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of alarming receiver cost and large antenna area, and achieve the effect of solving normal receiving problems, eliminating radar interference and reducing impact.

Inactive Publication Date: 2019-05-31
HUNAN MAXWELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is further reduced, the antenna area is very large, and the cost of the receiver will be very alarming

Method used

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  • Side-lobe cancellation method of S-band receiver for radar interference
  • Side-lobe cancellation method of S-band receiver for radar interference
  • Side-lobe cancellation method of S-band receiver for radar interference

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Embodiment

[0044] Those skilled in the art implement the present invention as a kind of S-band receiver to the sidelobe cancellation method of radar interference, including performing the following steps:

[0045] Step 1, set the first antenna with the first gain in the S-band receiver, set the second antenna with the second gain, the first gain is greater than the second gain, the side lobe direction gain of the second antenna is greater than that of the first antenna sidelobe directional gain and connecting the first antenna with the second antenna;

[0046]Step 2, after the first antenna and the second antenna receive the signal normally, then identify the sidelobe interference signal, if the signal received by the second antenna is stronger than the signal received by the first antenna, then the signal received by the second antenna at this time The signal is a sidelobe interference signal;

[0047] Step 3, using the sidelobe interference signal identified in step 2 to generate a ph...

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Abstract

The invention discloses a side-lobe cancellation method of an S-band receiver for radar interference. The method comprises the steps of (1) setting a first antenna with a first gain and setting a second antenna with a second gain in the S-band receiver, wherein the first gain is greater than the second gain, the side-lobe direction gain of the second antenna is greater than the side-lobe directiongain of the first antenna, and the first antenna is connected to the second antenna. According to the method, the influence of a radar sidelobe on the S-band receiver is greatly reduced, the method can be practical, the radar interference can be fundamentally eliminated, and the problem of the normal reception of the receiver under a radar working condition is solved fundamentally.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, and more specifically, relates to a sidelobe cancellation method for radar interference by an S-band receiver. Background technique [0002] Such as figure 1 As shown, the sidelobe level of the S-band phased array antenna is very high, generally -3dBi. Even if the spurious level of the radar in the S-band passes through the first sidelobe of the radar and enters the first sidelobe of the phased array receiver, its interference level has already exceeded the signal level of the satellite landing, exceeding 49dB Above, the S-band phased array receiver will be completely ineffective. Therefore, it is very necessary to reduce the sidelobe interference level. [0003] The Chinese patent with the publication number CN105259542B discloses an improved radar sidelobe jamming method, which includes the following steps: generating the noise jamming required for conventional radar sidelobe ...

Claims

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Application Information

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IPC IPC(8): G01S7/36
Inventor 张传胜
Owner HUNAN MAXWELL ELECTRONICS TECH
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