A tunable cross‐coupled trisection bandpass filter with constant bandwidth based on dual‐mode resonators

A novel third‐order tunable cross‐coupled trisection bandpass filter (BPF) based on dual‐mode resonators (DMRs) is presented in this letter. Electric and magnetic dominant coupling path can be constructed by using two coupled DMRs to meet the requirement of cross‐coupled tunable bandpass filter with...

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Veröffentlicht in:Microwave and optical technology letters 2020-05, Vol.62 (5), p.1888-1892
Hauptverfasser: Wang, Sheng, Xiang, Qianyin, Feng, Quanyuan
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Xiang, Qianyin
Feng, Quanyuan
description A novel third‐order tunable cross‐coupled trisection bandpass filter (BPF) based on dual‐mode resonators (DMRs) is presented in this letter. Electric and magnetic dominant coupling path can be constructed by using two coupled DMRs to meet the requirement of cross‐coupled tunable bandpass filter with constant bandwidth. Three resonating modes of the two DMRs are used to build the cross‐coupled trisection tunable bandpass filter topology. The coupling structure is analyzed and the coupling coefficients are calculated. The tunable BPF is designed, and a transmission zero (Tz) due to the cross‐coupled trisection topology is generated, so that frequency selectivity is enhanced. The prototype is fabricated and measured. The measured results show that the fabricated circuit realizes a tunable central frequency range from 1.64 to 2.16 GHz, maintaining a −3 dB bandwidth of 119.5 ± 3.5 MHz, and a Tz is generated at the lower side of the passband.
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Electric and magnetic dominant coupling path can be constructed by using two coupled DMRs to meet the requirement of cross‐coupled tunable bandpass filter with constant bandwidth. Three resonating modes of the two DMRs are used to build the cross‐coupled trisection tunable bandpass filter topology. The coupling structure is analyzed and the coupling coefficients are calculated. The tunable BPF is designed, and a transmission zero (Tz) due to the cross‐coupled trisection topology is generated, so that frequency selectivity is enhanced. The prototype is fabricated and measured. 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Electric and magnetic dominant coupling path can be constructed by using two coupled DMRs to meet the requirement of cross‐coupled tunable bandpass filter with constant bandwidth. Three resonating modes of the two DMRs are used to build the cross‐coupled trisection tunable bandpass filter topology. The coupling structure is analyzed and the coupling coefficients are calculated. The tunable BPF is designed, and a transmission zero (Tz) due to the cross‐coupled trisection topology is generated, so that frequency selectivity is enhanced. The prototype is fabricated and measured. The measured results show that the fabricated circuit realizes a tunable central frequency range from 1.64 to 2.16 GHz, maintaining a −3 dB bandwidth of 119.5 ± 3.5 MHz, and a Tz is generated at the lower side of the passband.</description><subject>Bandpass filters</subject><subject>Bandwidths</subject><subject>Circuits</subject><subject>Coupling coefficients</subject><subject>cross‐coupling</subject><subject>dual‐mode resonator</subject><subject>Frequency ranges</subject><subject>Resonators</subject><subject>Selectivity</subject><subject>Test methods</subject><subject>Topology</subject><subject>tunable bandpass filter</subject><issn>0895-2477</issn><issn>1098-2760</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kE1OwzAQhS0EEqWw4AaWWLFIO7aTOFlWFX9SUVnA2nL8I1KlcbAdVd1xBM7ISTAtWzYz0sz33mgeQtcEZgSAzrdumDFKC36CJgTqKqO8hFM0gaouMppzfo4uQtgAAOOcTlC3wHHsZdMZrLwL4fvzS7lx6IzG0bfBqNi6Hjey14MMAdu2i8bjXRvfsXJ9iLKPh-2u1WnUyJCESaBH2SWrrdMGexNcL6Pz4RKdWdkFc_XXp-jt_u51-Zit1g9Py8UqU7TmPGO1IjnjpjQSykozXWhaNMToHGiRlzXYytKa5g3UikqZKgdGaFlYZW3FOJuim6Pv4N3HaEIUGzf6Pp0UlFU5LysGJFG3R-rwuDdWDL7dSr8XBMRvmCKFKQ5hJnZ-ZHdtZ_b_g-J5_XJU_ADWX3kz</recordid><startdate>202005</startdate><enddate>202005</enddate><creator>Wang, Sheng</creator><creator>Xiang, Qianyin</creator><creator>Feng, Quanyuan</creator><general>John Wiley &amp; Sons, Inc</general><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-1911-0579</orcidid></search><sort><creationdate>202005</creationdate><title>A tunable cross‐coupled trisection bandpass filter with constant bandwidth based on dual‐mode resonators</title><author>Wang, Sheng ; Xiang, Qianyin ; Feng, Quanyuan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2977-39c1437e6ea068d3d5d25b1ed40254690f8f2924b09c2aa09c7031265fcff8373</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Bandpass filters</topic><topic>Bandwidths</topic><topic>Circuits</topic><topic>Coupling coefficients</topic><topic>cross‐coupling</topic><topic>dual‐mode resonator</topic><topic>Frequency ranges</topic><topic>Resonators</topic><topic>Selectivity</topic><topic>Test methods</topic><topic>Topology</topic><topic>tunable bandpass filter</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Sheng</creatorcontrib><creatorcontrib>Xiang, Qianyin</creatorcontrib><creatorcontrib>Feng, Quanyuan</creatorcontrib><collection>CrossRef</collection><collection>Electronics &amp; Communications Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology &amp; Engineering</collection><collection>Engineering Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Microwave and optical technology letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Sheng</au><au>Xiang, Qianyin</au><au>Feng, Quanyuan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A tunable cross‐coupled trisection bandpass filter with constant bandwidth based on dual‐mode resonators</atitle><jtitle>Microwave and optical technology letters</jtitle><date>2020-05</date><risdate>2020</risdate><volume>62</volume><issue>5</issue><spage>1888</spage><epage>1892</epage><pages>1888-1892</pages><issn>0895-2477</issn><eissn>1098-2760</eissn><abstract>A novel third‐order tunable cross‐coupled trisection bandpass filter (BPF) based on dual‐mode resonators (DMRs) is presented in this letter. Electric and magnetic dominant coupling path can be constructed by using two coupled DMRs to meet the requirement of cross‐coupled tunable bandpass filter with constant bandwidth. Three resonating modes of the two DMRs are used to build the cross‐coupled trisection tunable bandpass filter topology. The coupling structure is analyzed and the coupling coefficients are calculated. The tunable BPF is designed, and a transmission zero (Tz) due to the cross‐coupled trisection topology is generated, so that frequency selectivity is enhanced. The prototype is fabricated and measured. 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subjects Bandpass filters
Bandwidths
Circuits
Coupling coefficients
cross‐coupling
dual‐mode resonator
Frequency ranges
Resonators
Selectivity
Test methods
Topology
tunable bandpass filter
title A tunable cross‐coupled trisection bandpass filter with constant bandwidth based on dual‐mode resonators
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