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Article

Pseudo-Signal Interference Regularity of Single-Frequency Electromagnetic Radiation to Stepped-Frequency Radar

National Key Laboratory of Electromagnetic Environment Effects, Army Engineering University Shijiazhuang Campus, Shijiazhuang 050003, China
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Authors to whom correspondence should be addressed.
Electronics 2022, 11(17), 2768; https://doi.org/10.3390/electronics11172768
Submission received: 15 July 2022 / Revised: 17 August 2022 / Accepted: 1 September 2022 / Published: 2 September 2022
(This article belongs to the Section Circuit and Signal Processing)

Abstract

When typical radar equipment is subjected to single-frequency electromagnetic radiation, the radar display interface forms a pseudo-signal, resulting in the misjudgment of real targets. Based on the working principle of stepped-frequency radar ranging, the effect mechanism of radar equipment pseudo-signal interference is revealed. Taking a Ku band stepped-frequency ranging radar as the test object, the pseudo-signal interference effect test of single-frequency electromagnetic radiation is carried out in this study. The pseudo-signal level value of 6 dBmV is selected as the sensitive criterion of the pseudo-signal interference effect. Through experiments, the variation curves of the pseudo-signal level values of the sensitive frequency bands and the typical frequency points inside and outside the band with the field strength of the single-frequency interference are obtained. Based on the nonlinear distortion analysis of the receiving circuit, the variation laws of the pseudo-signal level values inside and outside the band are explained, respectively. The experimental results show that there are at least seven pseudo-signal interference-sensitive bands in the tested radar, and the first pseudo-signal strength is only related to the interference signal strength. The essence of the second type of pseudo-signal interference is intermodulation interference, and the pseudo-signal level is related to the interference signal and the useful signal strength.
Keywords: step-frequency radar; single-frequency electromagnetic radiation; pseudo-signal interference; effect law step-frequency radar; single-frequency electromagnetic radiation; pseudo-signal interference; effect law

Share and Cite

MDPI and ACS Style

Zhao, H.-Z.; Wei, G.-H.; Pan, X.-D.; Du, X.; Lyu, X.-X. Pseudo-Signal Interference Regularity of Single-Frequency Electromagnetic Radiation to Stepped-Frequency Radar. Electronics 2022, 11, 2768. https://doi.org/10.3390/electronics11172768

AMA Style

Zhao H-Z, Wei G-H, Pan X-D, Du X, Lyu X-X. Pseudo-Signal Interference Regularity of Single-Frequency Electromagnetic Radiation to Stepped-Frequency Radar. Electronics. 2022; 11(17):2768. https://doi.org/10.3390/electronics11172768

Chicago/Turabian Style

Zhao, Hong-Ze, Guang-Hui Wei, Xiao-Dong Pan, Xue Du, and Xu-Xu Lyu. 2022. "Pseudo-Signal Interference Regularity of Single-Frequency Electromagnetic Radiation to Stepped-Frequency Radar" Electronics 11, no. 17: 2768. https://doi.org/10.3390/electronics11172768

APA Style

Zhao, H.-Z., Wei, G.-H., Pan, X.-D., Du, X., & Lyu, X.-X. (2022). Pseudo-Signal Interference Regularity of Single-Frequency Electromagnetic Radiation to Stepped-Frequency Radar. Electronics, 11(17), 2768. https://doi.org/10.3390/electronics11172768

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