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