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General radar antenna amplitude jitter evaluation method

An evaluation method, radar antenna technology, applied in antenna radiation pattern, utilization of re-radiation, radio wave measurement system, etc., can solve problems such as imaging quality impact, difficulty in underground target recognition, large antenna amplitude jitter, etc., and achieve a perfect evaluation system Effect

Active Publication Date: 2021-07-16
中国电波传播研究所
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Problems solved by technology

From the radar single-channel waveform, the radar data jitters left and right along the abscissa, which affects the accuracy of the later data processing results
[0003] Antenna amplitude jitter will have a certain impact on the imaging quality of underground targets. The greater the antenna amplitude jitter, the worse the imaging quality will be.
Large antenna amplitude jitter will also bring difficulties to underground target recognition, which will affect the target recognition rate

Method used

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  • General radar antenna amplitude jitter evaluation method
  • General radar antenna amplitude jitter evaluation method

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Embodiment 1

[0023] Embodiment 1. This embodiment discloses a general radar system antenna amplitude jitter evaluation method. Based on ground penetrating radar data, the antenna amplitude jitter is evaluated, including direct-coupled wave positive peak amplitude jitter, direct-coupled wave negative peak amplitude Information about jitter, reflected wave positive peak amplitude jitter, and reflected wave negative peak amplitude jitter. Such as image 3 As shown, it specifically includes the following steps:

[0024] Step 1, get the radar data, connect the antenna and the radar host with a cable, such as Figure 4 As shown, the antenna is placed on a foam body whose height is 2 times the wavelength of the center frequency of the antenna, and the foam body is placed on a copper clad board 4 times the wavelength of the center frequency of the antenna. The copper clad board coincides with the center axis of the antenna, and the collected data is saved. The number is greater than 1000;

[00...

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Abstract

The invention discloses a general radar antenna amplitude jitter evaluation method comprising the following steps: step 1, acquiring radar data, and connecting an antenna and a radar host by using a cable; step 2, reading parameters of each piece of original data, including a sampling point, a time window, a frequency and a channel number, and shaving first 200 channels of data and last 200 channels of data of the original data; step 3, obtaining a direct coupling wave positive peak maximum value of the data; step 4, obtaining a direct coupling wave negative peak maximum value of the data; step 5, obtaining the maximum value of the reflected wave positive peak of the data; and step 6, obtaining the maximum value of the reflected wave negative peak of the data. According to the evaluation method disclosed by the invention, the positive peak amplitude jitter and the negative peak amplitude jitter of the direct coupling wave and the reflection wave of the radar data are calculated by using the ground penetrating radar data and combining an antenna amplitude jitter algorithm, and the magnitude of the antenna amplitude jitter in the radar system is judged.

Description

technical field [0001] The invention belongs to the field of general radar underground target detection, in particular to a general radar antenna amplitude shake evaluation method in the field. Background technique [0002] Ground-penetrating radar technology utilizes the penetration ability of specific frequency electromagnetic waves to the surface to emit electromagnetic waves to the surface, and then obtain the echo signals of underground targets. By processing the echo signals, underground target imaging is obtained, which is convenient for underground target positioning, identification and research. . The magnitude of the antenna amplitude represents the strength of the signal energy. In the raw data acquired by the radar, the antenna amplitude jitter will affect the stability of the data. In the case of a large antenna amplitude jitter, the peak point of the pulse signal broadens from a dot to a line laterally. From the radar single-channel waveform, the radar data j...

Claims

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Application Information

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IPC IPC(8): G01S7/40G01S13/88G01R29/10
CPCG01S7/4004G01S13/885G01R29/10
Inventor 王君超张友源程星王成浩尹达
Owner 中国电波传播研究所
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