Using stepped impedance resonators (SIR) as a basic resonator unit of cavity filter, a cross-coupling dual-band cavity filter is designed based on frequency transformation. According to the filter specifications,the design parameters of dual-band filter are calculated using frequency transformation. A model of SIR
cross-coupling dual-band cavity filter is then established and simulated by the 3D simulation software HFSS.Simulation results show good agreement with the result of schematic circuit in ADS, indicating that the method is valid and feasible. The simulation shows that the filter size is significantly reduced, while the restrain ability of stop-band is enhanced due to cross coupling. Thus the requirements of small size and good stop-band performance of the filter are met.
KOU Xin, XIAO Zhong-yin, HUANG Chun-yan, LI Hao, CHU Jun-jun
. SIR Cross-Coupling Dual-Band Cavity Filter[J]. Journal of Applied Sciences, 2014
, 32(2)
: 215
-220
.
DOI: 10.3969/j.issn.0255-8297.2014.02.015
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