Laws and Mechanism of Dual-frequency Insensitive Effect of Blocking Interference

ZHAO Kai; WEI Guanghui

doi:10.11999/JEIT210037

Volume 44 Issue 2

Feb. 2022

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ZHAO Kai, WEI Guanghui. Laws and Mechanism of Dual-frequency Insensitive Effect of Blocking Interference[J]. Journal of Electronics & Information Technology, 2022, 44(2): 754-759. doi: 10.11999/JEIT210037

Citation:

ZHAO Kai, WEI Guanghui. Laws and Mechanism of Dual-frequency Insensitive Effect of Blocking Interference[J]. Journal of Electronics & Information Technology, 2022, 44(2): 754-759. doi: 10.11999/JEIT210037

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Laws and Mechanism of Dual-frequency Insensitive Effect of Blocking Interference

doi: 10.11999/JEIT210037

ZHAO Kai,
WEI Guanghui^,

National Key Laboratory on Electromagnetic Environment Effects, Shijiazhuang Campus of Army Engineering University, Shijiazhuang 050003, China

Received Date: 2021-01-11
Rev Recd Date: 2021-04-14

Available Online: 2021-04-27

Publish Date: 2022-02-25

Abstract

Abstract

By introducing the 5th-order term of power series expansion, the nonlinear distortion of the system under dual -frequency interference is analyzed, and the essential reason of dual-frequency insensitive effect caused by blocking interference is revealed, which is verified by experiments. Theoretical analysis and experimental results show that when the interference signal strength is weak and the nonlinear distortion of the system is low, the transfer function can be described by the power series expansion accurate to the 3rd-order term, and the test equipment is sensitive to the effective value of the dual -frequency interference field strength; with the increase of the interference signal, the nonlinear distortion of the system increases, and the 5th-order term in the power series expansion cannot be ignored, and the higher the blocking degree is, the more serious the dual-frequency insensitive effect is.
- Nonlinear distortion,
- Blocking interference,
- Dual-frequency,
- Insensitive effect,
- Power series expansion

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References(17)

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