【摘 要】
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A dual-band coaxial waveguide mode converter is investigated.In the converter, the TEM mode (Coa.TEM) and TMol circular waveguide (Cir.TM) mode are transformed
【机 构】
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Lab 206, College of Optoelectronic Science and Engineering, National University of Defense Technolog
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A dual-band coaxial waveguide mode converter is investigated.In the converter, the TEM mode (Coa.TEM) and TMol circular waveguide (Cir.TM) mode are transformed simultaneously into TE coaxial waveguide (Coa.TE) mode and TE circular waveguide (Cir.TE) 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 and Cir.TM-to-Cir.TE 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.
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