Field Coupling Mechanism Investigation of mm-Wave Magnetic Near-Field Probe based on a Generalized Equivalent Circuit
A field-response-equivalent circuit is advantageous for explaining the field coupling mechanism of H-field probes. Previous works have primarily explained the coupling between a field probe and the calibration kit. In this paper, a field coupling circuit model is proposed in a generalized form to directly predict the voltage induced by the H-field and the unwanted E-field in the probe for the mm-wave range. The field response circuit model is based on the loop impedance model and incident field response of a loop antenna in the form of a series expansion. This paper reveals that the zero-mode response corresponds to H-field coupling, whereas the first mode corresponds to E-field coupling and is validated through the numerical simulation based on the circular loop antenna. The coupling of the fabricated H-field probe is predicted based on the equivalent circuit model and the prediction matches numerical simulation and measurement results from 1 GHz to 40 GHz. The equivalent circuit can be used to predict the probe field coupling with an error of less than 4 dB. Finally, this paper provides a generalized equivalent circuit as a tool to analyze and understand the probe field coupling quantitively. This paper reuses some content from thesis in sections I, II and III with permission.
S. Liu et al., "Field Coupling Mechanism Investigation of mm-Wave Magnetic Near-Field Probe based on a Generalized Equivalent Circuit," IEEE Transactions on Instrumentation and Measurement, Institute of Electrical and Electronics Engineers (IEEE), Feb 2022.
The definitive version is available at https://doi.org/10.1109/TIM.2022.3152317
Electrical and Computer Engineering
Electromagnetic Compatibility (EMC) Laboratory
Keywords and Phrases
Antennas; Couplings; Equivalent Circuit; Equivalent Circuits; Field Coupling Mechanism; H-Probe; Integrated Circuit Modeling; Load Modeling; Magnetic Near-Field Probe; Probes; Voltage
International Standard Serial Number (ISSN)
Article - Journal
© 2022 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
17 Feb 2022