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| Numerical Simulation of a Mode Converter from the Coaxial Waveguide TE01 Mode to the Circular Waveguide TE02 Mode |
| Luan Yuan-tao①②; Luo Ji-run①; Zhu Min①②; Yuan Guang-jiang① |
| ①Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China; ②Graduate School, Chinese Academy of Sciences, Beijing 100039, China |
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Abstract Numerical simulation of mode conversion from the coaxial waveguide TE◎01 mode to the circular waveguide TE○02 mode is studied. The mode conversion of directly connecting a coaxial waveguide to a cylindrical guide is analyzed, and the effect of a sector-slotted structure in the cylindrical guide for mode conversion is discussed for improving the conversion coefficient, bandwidth property and mode suppression for competing mode. The numerical simulation results with Ansoft HFSS show that 89.3% of the energy from input TE◎01 mode can be converted to the TE○02 mode, the -3dB bandwidth is about 820MHz, and the amplitude of the main competition mode, the TE○01 mode, is 10dB less than that of the TE○02 operating mode.
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Received: 17 March 2006
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2007, Vol. 29 
