A Spurious-Free Characteristic Mode Formulation Based on Surface Integral Equation for Patch Antenna Structures

Kun Fan, Ran Zhao, Guangshang Cheng, Zhixiang Huang, Jun Hu

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Conventional surface integral equation (SIE)-based characteristic mode formulation for the patch antenna structure with a finite substrate is susceptible to the spurious (nonphysical) modes due to the dielectric part. To avoid the contamination of spurious modes, we propose a novel generalized eigenvalue formulation based on the electric field integral equation coupled Poggio-Miller-Chang-Harrington-Wu-Tsai (EFIE-PMCHWT) equation. In this formulation, the real and imaginary parts of the exterior integral operators are chosen to construct the finalized weighting matrices, to connect radiated power of the characteristic current. Compared with other SIE-based methods, this equation doesnt need additional post-processing since it can effectively avoid spurious modes. Numerical results compared with the volume-surface integral equation (VSIE) are investigated to validate the accuracy.
Original languageEnglish (US)
Pages (from-to)1-1
Number of pages1
JournalIEEE Antennas and Wireless Propagation Letters
DOIs
StatePublished - 2022

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