An Equivalent Circuit Model to Analyze Passive Intermodulation of Loose Contact Coaxial Connectors
Loose contact coaxial connectors are significant sources of passive intermodulation (PIM) in high-power and high-frequency communication systems. In this paper, a circuit model is presented to analyze PIM distortion in loose contact coaxial connectors. First, the loose contact surface model is built to calculate metal-insulator-metal and metal-metal contact resistance; and a method of time-domain reflectometry is used to verify the additional impedance of the loose contact surface. Then, the loose contact current is investigated to drive the equivalent circuit model of loose contact coaxial connectors. Finally, a two-tone experimental verification is conducted to show that the PIM of a loose contact coaxial connector can be analyzed by this model.
H. Yang et al., "An Equivalent Circuit Model to Analyze Passive Intermodulation of Loose Contact Coaxial Connectors," IEEE Transactions on Electromagnetic Compatibility, vol. 60, no. 5, pp. 1180-1189, Institute of Electrical and Electronics Engineers (IEEE), Oct 2018.
The definitive version is available at https://doi.org/10.1109/TEMC.2018.2794992
Electrical and Computer Engineering
Electromagnetic Compatibility (EMC) Laboratory
National Natural Science Foundation (China)
Science and Technology Major Project of Hunan Province
Keywords and Phrases
Circuit simulation; Connectors (structural); Contacts (fluid mechanics); Electric resistance; Intermodulation distortion; Intermodulation measurement; Metals; Surface resistance; Time domain analysis; Timing circuits; Transmission line theory; Coaxial connectors; Integrated circuit modeling; Metal contacts; Passive intermodulation (PIM); Surface impedances; Equivalent circuits; Loose contact; Metal-insulator-metal contact (MIM); Metal-metal contact (MM)
International Standard Serial Number (ISSN)
Article - Journal
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