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- Title
Pseudo-Signal Interference Regularity of Single-Frequency Electromagnetic Radiation to Stepped-Frequency Radar.
- Authors
Zhao, Hong-Ze; Wei, Guang-Hui; Pan, Xiao-Dong; Du, Xue; Lyu, Xu-Xu
- 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.
- Subjects
RADAR equipment; RADAR; ELECTROMAGNETIC radiation; RADAR indicators; ELECTROMAGNETIC testing; NONLINEAR analysis; RADAR interference
- Publication
Electronics (2079-9292), 2022, Vol 11, Issue 17, p2768
- ISSN
2079-9292
- Publication type
Article
- DOI
10.3390/electronics11172768