Vol. 96

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2020-09-15

Penetration through Slots in Cylindrical Cavities Operating at Fundamental Cavity Modes in the Presence of Electromagnetic Absorbers

By Salvatore Campione, Larry Kevin Warne, Isak C. Reines, Roy K. Gutierrez, and Jeffery T. Williams
Progress In Electromagnetics Research M, Vol. 96, 119-127, 2020
doi:10.2528/PIERM20060803

Abstract

Placing microwave absorbing materials into a high-quality factor resonant cavity may in general reduce the large interior electromagnetic fields excited under external illumination. In this paper, we aim to combine two analytical models we previously developed: 1) an unmatched formulation for frequencies below the slot resonance to model shielding effectiveness versus frequency; and 2) a perturbation model approach to estimate the quality factor of cavities in the presence of absorbers. The resulting model realizes a toolkit with which design guidelines of the absorber's properties and location can be optimized over a frequency band. Analytic predictions of shielding effectiveness for three transverse magnetic modes for various locations of the absorber placed on the inside cavity wall show good agreement with both full-wave simulations and experiments, and validate the proposed model. This analysis opens new avenues for specialized ways to mitigate harmful fields within cavities.

Citation


Salvatore Campione, Larry Kevin Warne, Isak C. Reines, Roy K. Gutierrez, and Jeffery T. Williams, "Penetration through Slots in Cylindrical Cavities Operating at Fundamental Cavity Modes in the Presence of Electromagnetic Absorbers," Progress In Electromagnetics Research M, Vol. 96, 119-127, 2020.
doi:10.2528/PIERM20060803
http://jpier.org/PIERM/pier.php?paper=20060803

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