Parallel coupled-line bandpass filter with branch-line shape for G-band frequency

被引：5
|
作者：
Hwang, C. -J. [1 ]
Lok, L. B. [1 ]
Thayne, I. G. [1 ]
Elgaid, K. [1 ]
机构：
[1] Univ Glasgow, Dept Elect & Elect Engn, Glasgow G12 8LT, Lanark, Scotland
来源：
ELECTRONICS LETTERS | 2009年 / 45卷 / 16期
基金：
英国工程与自然科学研究理事会;
关键词：
SUPPRESSION;
D O I：
10.1049/el.2009.0716
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：
A parallel coupled-line planar bandpass filter (BPF) with branch-line shape using coplanar waveguide technology on GaAs substrate is presented. The unit parallel coupled-line BPF utilises a parallel coupledline resonator with an open-ended stub which has suppression response of spurious band. Four unit parallel coupled-line BPFs are integrated with branch-line shape and open-circuit stubs on input and output ports are also integrated for improvement of rejection performance. The proposed fourth-order filter was fabricated on GaAs substrate with dielectric thickness of 50 mm and gold thickness of 1.2 mu m. The fabricated fourth-order BPF shows a 3 dB bandwidth from 177 to 209 GHz frequency range with insertion loss of 6.5 dB, rejection of 38 dB and return loss better than 12 dB. It has a high resolution fractional bandwidth of 17%
引用
收藏
页码：838 / 839
页数：2
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