Compact Planar Bandpass Filters with Arbitrarily-Shaped Conductor Patches and Slots

Tadashi KIDO  Hiroyuki DEGUCHI  Mikio TSUJI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E94-C   No.6   pp.1091-1097
Publication Date: 2011/06/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E94.C.1091
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
filter,  UWB,  DSG,  genetic algorithms,  planar circuit,  

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Summary: 
This paper develops planar circuit filters consisting of arbitrarily-shaped conductor patches and slots on a conductor-backed dielectric substrate, which are designed by an optimization technique based on the genetic algorithm. The developed filter has multiple resonators and their mutual couplings in the limited space by using both sides of the substrate, so that its compactness is realized. We first demonstrate the effectiveness of the present filter structure from some design samples numerically and experimentally. Then as a practical application, we design compact UWB filters, and their filter characteristics are verified from the measurements.