A New Analytical Method for Calculating the Cutoff Frequencies of an Eccentrically Dielectric-Loaded Circular Waveguide

被引：6
|
作者：
Gholizadeh, M. [1 ]
Hojjat Kashani, F. [1 ]
机构：
[1] Iran Univ Sci & Technol, Dept Elect Engn, Tehran 1684613114, Iran
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2020年 / 30卷 / 05期
关键词：
Cutoff frequency; Circular waveguides; Dielectrics; Magnetic separation; Microwave theory and techniques; Wireless communication; Bipolar coordinate system (BCS); circular waveguide; cutoff frequencies; Helmholtz equation; PROPAGATION;
D O I：
10.1109/LMWC.2020.2981925
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This letter provides an analytical method to calculate the cutoff frequencies and waveguide modes of conducting circular waveguide eccentrically loaded with a dielectric material based on bipolar coordinate system (BCS). A circular waveguide partially filled with an eccentric dielectric cylinder supports hybrid electric (HE) and hybrid magnetic (EH) modes with nonzero longitudinal electric and magnetic fields, respectively. The cutoff frequencies of the HE and EH modes have been calculated and compared to benchmark results. An analytical expression for the electromagnetic fields has been also proposed and the validity range of the solution has been discussed. An excellent agreement between the calculated cutoff frequencies with those obtained by more rigorous numerical methods has been observed. Our analytical method provides better physical intuition and is fast, accurate, and easy to implement.
引用
收藏
页码：453 / 456
页数：4
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