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A constant absolute bandwidth tunable filter using varactor-loaded open-loop resonators
Huang X.1; Feng Q.1; Zhu L.2; Xiang Q.1
2013-12-01
Source PublicationAsia-Pacific Microwave Conference Proceedings, APMC
Pages872-874
AbstractThis paper presents a new type of lager tuning rate tunable filters using varactor-loaded open-loop resonators. The filter is based on capacitively loaded folded λ/2 resonators that are coupled to each other with mixed electrical and magnetic coupling. By adjusting the value of the varactors between the open gaps in a mixed coupled filter, the coupling coefficients and external quality can be tuned to meet the requirement of constant absolute bandwidth. The fabricated filter shows a tuning rate of 460 MHz/pF. To our knowledge, this planar tunable filter represents state-of-the art tuning rate characteristics among the varactor-tuned filter. © 2013 IEEE.
KeywordBandpass filter constant absolute bandwidth coupling coefficient tunable filter
DOI10.1109/APMC.2013.6694986
URLView the original
Language英語
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Document TypeConference paper
专题DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.Southwest Jiaotong University
2.Nanyang Technological University
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GB/T 7714
Huang X.,Feng Q.,Zhu L.,et al. A constant absolute bandwidth tunable filter using varactor-loaded open-loop resonators[C],2013:872-874.
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