Full Study of the Parallel-Coupled Stub-Loaded Resonator: Synthesis Method in a Narrow Band With an Extended Optimal Rejection Bandwidth

被引:17
|
作者
Akra, Minra [1 ,2 ]
Pistono, Emmanuel [1 ]
Issa, Hamza [4 ]
Jrad, Akil [3 ]
Ferrari, Philippe [1 ]
机构
[1] Grenoble Univ, CNRS, UMR 5130, Inst Microelect Electromagnetism & Photon IMEP LA, F-38016 Grenoble, France
[2] Lebanese Univ, AZM Ctr, EDST, Lab Elect Syst Telecommun & Networks Lastre, Tripoli, Lebanon
[3] Lebanese Univ, AZM Ctr, EDST, Elect Syst Telecommun & Networks Lastre, Tripoli, Lebanon
[4] Arab Univ, Beirut, Lebanon
关键词
Bandpass filter; microstrip; out-of-band rejection; parallel-coupled stub-loaded resonator; spurious frequencies; stripline; synthesis method; transmission zero; LINE FILTERS; DESIGN; MODE; SUPPRESSION;
D O I
10.1109/TMTT.2014.2364599
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 paper gives a complete theoretical study in a narrow band for the parallel-coupled filters based on short-circuited stub-loaded resonators. It describes a synthesis method for this filter topology, and a complete resonant mode analysis to fully control the spurious frequencies positions. To enlarge the out-of-band rejection, an original technique, based on simple design steps, is used to address tuning of extra transmission zeros. Harmonic was suppressed to better than 35 dB with a wide stop-band of more than six time the fundamental frequency. Design equations and design rules are given. Finally, several three-pole bandpass filters are designed and characterized in stripline and miscrostrip technologies to demonstrate the efficiency of the proposed concepts.
引用
收藏
页码:3380 / 3392
页数:13
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