A Quasi Elliptic Function 1.75-2.25 GHz 3-Pole Bandpass Filter With Bandwidth Control

被引：70
作者：
Chiou, Yi-Chyun [1 ]
Rebeiz, Gabriel M. [1 ]
机构：
[1] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2012年 / 60卷 / 02期
关键词：
Bandpass filter; combline resonator; elliptic-function response; non-adjacent resonator coupling; tunable bandwidth filter; tunable filter; COMBLINE FILTER;
D O I：
10.1109/TMTT.2011.2178260
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 three-pole microstrip combline filter with a center frequency of 1.75-2.25 GHz and a tunable bandwidth of 70-100 MHz is presented. In this design, an extra transmission zero is created using a non-adjacent resonator coupling, and is placed on the lower side of the passband to improve the filter selectivity. The filter bandwidth is also tuned by controlling the non-adjacent resonator coupling. The measured S-parameters, third-order intercept point and power handling, for different center frequencies and bandwidths, are presented and with good agreement with simulations. This topology is simple to implement and requires only one additional tunable component between the first and third resonator for bandwidth control.
引用
收藏
页码：244 / 249
页数：6
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