A Dual-Band Coaxial Waveguide Mode Converter for High-Power Microwave Applications

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2011,（6）
• 页码范围: 326-328
• 页数: 3页
• 语种: 英文
• DOI: 10.1088/0256-307X/28/6/068401

摘要

A dual-band coaxial waveguide mode converter is investigated.In the converter, the TEM mode (Coa.TEM) and TMol circular waveguide (Cir.TM<,01>) mode are transformed simultaneously into TE<,11> coaxial waveguide (Coa.TE<,11>) mode and TE<,11> circular waveguide (Cir.TE<,11>) mode, respectively.The optimized geometrical di- mensions are achieved by employing the mode coupling theory.A mode converter at 1.3GHz and 5.0GHz is designed, and conversion efficiencies of Coa.TEM-to-Coa.TE<,11> and Cir.TM<,01>-to-Cir.TE<,11> are 99.88% and 99.70% at central frequency, respectively.Over the frequency ranges 1.15 1.51 GHz and 4.87-5.19CHz, the conversion efficiency exceeds 90%.A good agreement between theoretical calculations and computer simulations is observed, demonstrating the feasibility of the dual-band mode converter.