Research Article
Generation Mechanism and Characteristic Analysis of Dual-Frequency Pseudo-Signal Interference of the Swept-Frequency Radar
Table 3
Two-frequency second-order intermodulation and third-order intermodulation “spike” type pseudo-signal test results.
| | Interference field strength 1 (dBV/m) | Interference field strength 2 (dBV/m) | Second-order intermodulation pseudo-signal level (dBmV) | Third-order intermodulation pseudo-signal level (dBmV) | Second-order intermodulation pseudo-signal distance (m) | Third-order intermodulation pseudo-signal distance (m) | Distance difference (m) |
| Transmit signal attenuation 30 dB | −59 | −59 | 3.03 | 13.39 | 913.4 | 921.7 | 8.3 | −54 | −54 | 7.38 | 20.11 | 917.2 | 925.4 | 8.2 | −49 | −49 | 13.35 | 26.81 | 916.4 | 924.7 | 8.3 | −44 | −44 | 17.62 | 31.36 | 915.7 | 923.9 | 8.2 | −39 | −39 | 21.89 | 33.86 | 920.2 | 928.4 | 8.2 | −34 | −34 | 26.04 | 33.09 | 920.2 | 928.4 | 8.2 | −29 | −29 | 28.57 | 30.11 | 904.4 | 912.7 | 8.3 | −24 | −24 | 28.9 | 27.64 | 906.7 | 914.9 | 8.2 | −19 | −19 | 27.55 | 24.37 | 903.7 | 912.0 | 8.3 | −14 | −14 | 27.66 | 21.1 | 902.9 | 911.2 | 8.3 | −9 | −9 | 28.3 | 17.93 | 905.9 | 914.2 | 8.3 | −4 | −4 | 28.34 | 14.51 | 909.7 | 917.9 | 8.2 |
| Transmit signal attenuation 40 dB | −59 | −59 | 2.33 | 4.89 | 907.2 | 915.4 | 8.2 | −54 | −54 | 8.65 | 10.95 | 904.2 | 912.5 | 8.3 | −49 | −49 | 13.37 | 16.64 | 908.7 | 916.9 | 8.2 | −44 | −44 | 16.7 | 20.42 | 908.7 | 916.9 | 8.2 | −39 | −39 | 21.25 | 22.04 | 910.9 | 919.2 | 8.3 | −34 | −34 | 25.17 | 20.11 | 910.9 | 919.2 | 8.3 | −29 | −29 | 27.63 | 18.15 | 905.7 | 913.9 | 8.2 | −24 | −24 | 28.86 | 15.26 | 906.4 | 914.7 | 8.3 | −19 | −19 | 27.47 | 12.79 | 909.4 | 917.6 | 8.3 | −14 | −14 | 27.67 | 10.86 | 907.2 | 915.4 | 8.2 | −9 | −9 | 27.44 | 8.25 | 907.9 | 916.2 | 8.3 | −4 | −4 | 28.43 | 6.03 | 908.7 | 916.9 | 8.2 |
|
|