A Linear Phase Filter in Quadruplet Topology With Frequency-Dependent Couplings

被引：41
作者：
Szydlowski, Lukasz [1 ]
Leszczynska, Natalia [1 ]
Mrozowski, Michal [1 ]
机构：
[1] Gdansk Univ Technol, WiComm Ctr Excellence, Dept Elect Telecommun & Informat, Gdansk, Poland
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2014年 / 24卷 / 01期
关键词：
Frequency-dependent couplings; generalized Chebyshev filters; linear phase filters; microwave bandpass filters (BPFs); mixed couplings; substrate integrated waveguide (SIW); COUPLED-RESONATOR FILTERS; BANDPASS-FILTERS; EQUALIZERS; DESIGN;
D O I：
10.1109/LMWC.2013.2288178
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This letter presents a design of a linear phase microwave bandpass filter. The filter is composed of four resonators arranged in the quadruplet topology. Making the cross and one direct coupling dispersive gives additional design flexibility. The first advantage of using frequency-dependent couplings is the possibility to chose an arbitrary location of a pair of complex transmission zeros (TZs) in the s-domain. The second one is the presence of an additional imaginary transmission zero that improves the filter selectivity. We provide a proof-of-concept design of a filter using substrate integrated waveguide (SIW) technology. The frequency-dependent couplings are implemented in SIW as a composition of both: an inductive part realized in a form of an H-plane iris and a capacitive part realized as a grounded coplanar waveguide (GCPW). The measured filter characteristics prove the validity of the model.
引用
收藏
页码：32 / 34
页数：3
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