A Phase Jitter Evaluation Method for Ground Penetrating Radar Antenna
A phase jitter, antenna technology, applied in antenna radiation patterns, radio wave measurement systems, radio wave reflection/re-radiation and other directions, can solve problems affecting the imaging quality of underground targets, target recognition rate, large errors, etc., and achieves the evaluation system. Objective perfection, enhanced stability, and the effect of facilitating imaging and recognition
Active Publication Date: 2022-02-01
中国电波传播研究所
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Problems solved by technology
If the antenna phase jitter of the radar system is large, the error between the target position information obtained from the echo signal and the real position information will also be large, and it will also affect the imaging quality and target recognition rate of underground targets.
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Embodiment 1
[0022] Embodiment 1. This embodiment discloses a ground penetrating radar antenna phase jitter evaluation method. Based on the ground penetrating radar data, the phase jitter of the antenna is evaluated, including the positive peak phase jitter of the direct coupled wave and the negative peak phase of the direct coupled wave. Jitter, reflected wave positive peak phase jitter, reflected wave negative peak phase jitter information. Such as image 3 As shown, it specifically includes the following steps:
[0023] 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;...
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The invention discloses a ground penetrating radar antenna phase jitter evaluation method, comprising the following steps: step 1, obtaining radar data, connecting the antenna and the radar host with a cable; step 2, reading the parameters of each original data; step 3, obtaining The number of sampling points corresponding to the maximum value of the positive peak of the direct-coupled wave of each data; step 4, the number of sampling points corresponding to the maximum value of the negative peak of the direct-coupled wave of each data; step 5, the positive peak of the reflected wave of each data The number of sampling points corresponding to the maximum value; in step 6, the number of sampling points corresponding to the maximum value of the negative peak of the reflected wave of each channel of data is obtained. The phase jitter evaluation method of the ground penetrating radar antenna disclosed by the present invention can intuitively judge the magnitude of the phase jitter of the antenna in the radar system, so that the indicators for evaluating the performance of the ground penetrating radar system are diversified, and the evaluation system is more objective and perfect.
Description
technical field [0001] The invention belongs to the field of underground target detection, and in particular relates to a method for evaluating phase jitter of a ground-penetrating radar antenna in the field. Background technique [0002] Ground-penetrating radar uses the ability of electromagnetic waves to penetrate underground media to detect underground targets. The accuracy and stability of the original data are very important for later data processing. Antenna phase jitter will cause errors in the arrival time of reflected waves. From the perspective of radar single-track data, the antenna phase jitter will cause the data to fluctuate up and down along the depth method. If the antenna phase jitter of the radar system is large, the error between the target position information obtained from the echo signal and the real position information will also be large, and it will also affect the imaging quality and target recognition rate of underground targets. In order to ens...
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IPC IPC(8): G01S7/40G01S13/88G01R29/10
CPCG01S7/4004G01S13/885G01R29/10
Inventor 程星程丹丹王蕾赵翠荣王君超
Owner 中国电波传播研究所