Wide- and narrow-band bandpass coplanar filters in the W-frequency band

被引:26
作者
Rius, E
Prigent, G
Happy, H
Dambrine, G
Boret, S
Cappy, A
机构
[1] LEST, F-29285 Brest, France
[2] IEMN, F-59652 Villeneuve Dascq, France
关键词
bandpass filter; coplanar technology; monolithic microwave integrated circuit (MMIC); W-frequency band;
D O I
10.1109/TMTT.2003.808586
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 deals with the design of passive coplanar devices in the W-frequency band. As long as coplanar transmission lines are correctly dimensioned, analytical models based on quasi-TEM approximation can be used. Such models are associated with a correct definition of the reference planes at the junctions and employed for junction discontinuities, T- and cross-junctions. In order to validate these assertions, simulated and experimental data on classical quarter-wavelength shunt-stub filters are first presented. Then the design of traditional coupled-line filters is examined. The problems in. terms of insertion loss associated with these kinds of narrow-band applications are discussed here. Minimization of insertion losses requires increasing the width of the strips. Consequently, the design becomes complex and modeling using transmission-line models less accurate. Nevertheless, as an optimization procedure is needed to tune the filter theoretically, such a very fast design method is necessary. Simulated and experimental results in the range 500 MHz to 110 GHz are compared throughout the paper.
引用
收藏
页码:784 / 791
页数:8
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