CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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A Dual-Band Coaxial Waveguide Mode Converter for High-Power Microwave Applications |
ZHANG Qiang**, YUAN Cheng-Wei, LIU Lie
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Lab 206, College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073
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Cite this article: |
ZHANG Qiang, YUAN Cheng-Wei, LIU Lie 2011 Chin. Phys. Lett. 28 068401 |
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Abstract A dual-band coaxial waveguide mode converter is investigated. In the converter, the TEM mode (Coa.TEM) and TM01 circular waveguide (Cir.TM01) mode are transformed simultaneously into TE11 coaxial waveguide (Coa.TE11) mode and TE11 circular waveguide (Cir.TE11) mode, respectively. The optimized geometrical dimensions are achieved by employing the mode coupling theory. A mode converter at 1.3 GHz and 5.0 GHz is designed, and conversion efficiencies of Coa.TEM−to-Coa.TE11 and Cir.TM01−to-Cir.TE11 are 99.88% and 99.70% at central frequency, respectively. Over the frequency ranges 1.15–1.51 GHz and 4.87–5.19 GHz, 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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Keywords:
84.40.Az
84.40.Ba
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Received: 24 November 2010
Published: 29 May 2011
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PACS: |
84.40.Az
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(Waveguides, transmission lines, striplines)
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84.40.Ba
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(Antennas: theory, components and accessories)
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