A microwave ceramic band-pass filter for mobile communications with new coupling structure |
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| Authors: | Fei Liang Zhipeng Wu Wenzhong Lu Xiaochuan Wang |
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| Institution: | (1) Department of Electronics Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, China;(2) School of Electrical Engineering and Electronics, the University of Manchester, P O Box 88, Manchester, M60 1QD, UK |
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| Abstract: | A surface mounted device (SMD) microwave ceramic band-pass filter for mobile communication with a new coupling structure is
reported in this paper. In this filter, the external and internal coupling structures are fabricated on an alumina substrate
and both resonators and coupling structures are placed into a metal house to cut off its radiation. The relationship between
the coupling structures and the performance of filter is analyzed by high frequency structure software (HFSS) and the filter
with the center frequency of 836.5 MHz, the bandwith of 40.0 MHz, the pass-band ripple of 0.1 dB and the insertion loss of
1.5 dB has been successfully designed and fabricated. The measured results show a good agreement with the simulation results.
Foundation item: Supported by Sino-British Excellent Youth Scholar Foundation (2005362) and the Natural Science Foundation of Hubei Province
(2008CDB315) |
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| Keywords: | band-pass filter coaxial resonator coupling coefficient surface mounted device (SMD) |
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