Reconfigurable Low-Pass Filter With Sharp Roll-Off and Wide Tuning Range
A miniaturized reconfigurable low-pass filter (LPF) with a sharp roll-off, wide tuning range, and extended stopband is presented in this letter. The proposed LPF consists of two fixed low-pass (LP) cells and a tunable bandstop (BS) cell loaded with two pairs of varactor diodes. The BS cell with tuna...
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| Veröffentlicht in: | IEEE microwave and wireless components letters 2020-07, Vol.30 (7), p.649-652 |
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| creator | Fan, Maoyu Song, Kaijun Fan, Yong |
| description | A miniaturized reconfigurable low-pass filter (LPF) with a sharp roll-off, wide tuning range, and extended stopband is presented in this letter. The proposed LPF consists of two fixed low-pass (LP) cells and a tunable bandstop (BS) cell loaded with two pairs of varactor diodes. The BS cell with tunable stopband edges is employed to achieve the reconfigurable cutoff frequency and sharp roll-off characteristics in the whole LPF. The fixed LP cells are utilized to suppress the high passband of the BS cell, which obtain the tunable LP filtering response and wide stopband. For experimental demonstration purposes, a microstrip prototype of the proposed reconfigurable LPF with a wide fractional tuning range of 78.8% and roll-off rate over 103 dB/GHz is simulated, fabricated, and measured. The wide stopband is extended up to 10 GHz with a rejection level better than 15 dB, and the overall dimension is 0.078\lambda _{\mathrm {g}} \times 0.08\lambda _{\mathrm {g}} . This physical size is comparable to more compact, prior art reconfigurable LPFs while featuring among the sharpest roll-off rate ever reported. |
| doi_str_mv | 10.1109/LMWC.2020.2997099 |
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The proposed LPF consists of two fixed low-pass (LP) cells and a tunable bandstop (BS) cell loaded with two pairs of varactor diodes. The BS cell with tunable stopband edges is employed to achieve the reconfigurable cutoff frequency and sharp roll-off characteristics in the whole LPF. The fixed LP cells are utilized to suppress the high passband of the BS cell, which obtain the tunable LP filtering response and wide stopband. For experimental demonstration purposes, a microstrip prototype of the proposed reconfigurable LPF with a wide fractional tuning range of 78.8% and roll-off rate over 103 dB/GHz is simulated, fabricated, and measured. The wide stopband is extended up to 10 GHz with a rejection level better than 15 dB, and the overall dimension is <inline-formula> <tex-math notation="LaTeX">0.078\lambda _{\mathrm {g}} \times 0.08\lambda _{\mathrm {g}} </tex-math></inline-formula>. This physical size is comparable to more compact, prior art reconfigurable LPFs while featuring among the sharpest roll-off rate ever reported.</description><identifier>ISSN: 1531-1309</identifier><identifier>ISSN: 2771-957X</identifier><identifier>EISSN: 1558-1764</identifier><identifier>EISSN: 2771-9588</identifier><identifier>DOI: 10.1109/LMWC.2020.2997099</identifier><identifier>CODEN: IMWCBJ</identifier><language>eng</language><publisher>PISCATAWAY: IEEE</publisher><subject>Bandstop (BS) ; Cutoff frequency ; Engineering ; Engineering, Electrical & Electronic ; Equivalent circuits ; Low pass filters ; low-pass filter (LPF) ; reconfigurable filter ; Reconfiguration ; Resonators ; roll-off ; Scattering parameters ; Science & Technology ; Technology ; Tuning ; Varactor diodes ; Varactors ; Wireless communication</subject><ispartof>IEEE microwave and wireless components letters, 2020-07, Vol.30 (7), p.649-652</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>true</woscitedreferencessubscribed><woscitedreferencescount>13</woscitedreferencescount><woscitedreferencesoriginalsourcerecordid>wos000546879600007</woscitedreferencesoriginalsourcerecordid><citedby>FETCH-LOGICAL-c293t-3d7a72102ba39df13299b0a8bffa6046dadcc50a26d55ff621fb78c1045355a23</citedby><cites>FETCH-LOGICAL-c293t-3d7a72102ba39df13299b0a8bffa6046dadcc50a26d55ff621fb78c1045355a23</cites><orcidid>0000-0003-4750-1905 ; 0000-0002-1252-0586 ; 0000-0002-0717-894X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/9108202$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>315,782,786,798,27931,27932,28255,54765</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/9108202$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Fan, Maoyu</creatorcontrib><creatorcontrib>Song, Kaijun</creatorcontrib><creatorcontrib>Fan, Yong</creatorcontrib><title>Reconfigurable Low-Pass Filter With Sharp Roll-Off and Wide Tuning Range</title><title>IEEE microwave and wireless components letters</title><addtitle>LMWC</addtitle><addtitle>IEEE MICROW WIREL CO</addtitle><description>A miniaturized reconfigurable low-pass filter (LPF) with a sharp roll-off, wide tuning range, and extended stopband is presented in this letter. The proposed LPF consists of two fixed low-pass (LP) cells and a tunable bandstop (BS) cell loaded with two pairs of varactor diodes. The BS cell with tunable stopband edges is employed to achieve the reconfigurable cutoff frequency and sharp roll-off characteristics in the whole LPF. The fixed LP cells are utilized to suppress the high passband of the BS cell, which obtain the tunable LP filtering response and wide stopband. For experimental demonstration purposes, a microstrip prototype of the proposed reconfigurable LPF with a wide fractional tuning range of 78.8% and roll-off rate over 103 dB/GHz is simulated, fabricated, and measured. The wide stopband is extended up to 10 GHz with a rejection level better than 15 dB, and the overall dimension is <inline-formula> <tex-math notation="LaTeX">0.078\lambda _{\mathrm {g}} \times 0.08\lambda _{\mathrm {g}} </tex-math></inline-formula>. This physical size is comparable to more compact, prior art reconfigurable LPFs while featuring among the sharpest roll-off rate ever reported.</description><subject>Bandstop (BS)</subject><subject>Cutoff frequency</subject><subject>Engineering</subject><subject>Engineering, Electrical & Electronic</subject><subject>Equivalent circuits</subject><subject>Low pass filters</subject><subject>low-pass filter (LPF)</subject><subject>reconfigurable filter</subject><subject>Reconfiguration</subject><subject>Resonators</subject><subject>roll-off</subject><subject>Scattering parameters</subject><subject>Science & Technology</subject><subject>Technology</subject><subject>Tuning</subject><subject>Varactor diodes</subject><subject>Varactors</subject><subject>Wireless communication</subject><issn>1531-1309</issn><issn>2771-957X</issn><issn>1558-1764</issn><issn>2771-9588</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><sourceid>AOWDO</sourceid><recordid>eNqNkE1LxDAQhoso-PkDxEvBo3SdSZq2OUrxCyor68oeS9oma6Qma9Ky-O_NUtGrpxmG55kZ3ig6R5ghAr-unlbljACBGeE8B873oiNkrEgwz9L9XU8xQQr8MDr2_h0A0yLFo-hhIVtrlF6PTjS9jCu7TZ6F9_Gd7gfp4pUe3uKXN-E28cL2fTJXKhamC_NOxsvRaLOOF8Ks5Wl0oETv5dlPPYle726X5UNSze8fy5sqaQmnQ0K7XOQEgTSC8k4hDe82IIpGKZFBmnWia1sGgmQdY0plBFWTFy1CyihjgtCT6HLau3H2c5R-qN_t6Ew4WZOUEEg5JxgonKjWWe-dVPXG6Q_hvmqEehdYvQus3gVW_wQWnGJytrKxyrdamlb-egDA0qzIeRY6yEs9iEFbU9rRDEG9-r8a6IuJ1lL-URyhCP_Qb_8thhY</recordid><startdate>20200701</startdate><enddate>20200701</enddate><creator>Fan, Maoyu</creator><creator>Song, Kaijun</creator><creator>Fan, Yong</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AOWDO</scope><scope>BLEPL</scope><scope>DTL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-4750-1905</orcidid><orcidid>https://orcid.org/0000-0002-1252-0586</orcidid><orcidid>https://orcid.org/0000-0002-0717-894X</orcidid></search><sort><creationdate>20200701</creationdate><title>Reconfigurable Low-Pass Filter With Sharp Roll-Off and Wide Tuning Range</title><author>Fan, Maoyu ; Song, Kaijun ; Fan, Yong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c293t-3d7a72102ba39df13299b0a8bffa6046dadcc50a26d55ff621fb78c1045355a23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Bandstop (BS)</topic><topic>Cutoff frequency</topic><topic>Engineering</topic><topic>Engineering, Electrical & Electronic</topic><topic>Equivalent circuits</topic><topic>Low pass filters</topic><topic>low-pass filter (LPF)</topic><topic>reconfigurable filter</topic><topic>Reconfiguration</topic><topic>Resonators</topic><topic>roll-off</topic><topic>Scattering parameters</topic><topic>Science & Technology</topic><topic>Technology</topic><topic>Tuning</topic><topic>Varactor diodes</topic><topic>Varactors</topic><topic>Wireless communication</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Fan, Maoyu</creatorcontrib><creatorcontrib>Song, Kaijun</creatorcontrib><creatorcontrib>Fan, Yong</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>Web of Science - Science Citation Index Expanded - 2020</collection><collection>Web of Science Core Collection</collection><collection>Science Citation Index Expanded</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE microwave and wireless components letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Fan, Maoyu</au><au>Song, Kaijun</au><au>Fan, Yong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reconfigurable Low-Pass Filter With Sharp Roll-Off and Wide Tuning Range</atitle><jtitle>IEEE microwave and wireless components letters</jtitle><stitle>LMWC</stitle><stitle>IEEE MICROW WIREL CO</stitle><date>2020-07-01</date><risdate>2020</risdate><volume>30</volume><issue>7</issue><spage>649</spage><epage>652</epage><pages>649-652</pages><issn>1531-1309</issn><issn>2771-957X</issn><eissn>1558-1764</eissn><eissn>2771-9588</eissn><coden>IMWCBJ</coden><abstract>A miniaturized reconfigurable low-pass filter (LPF) with a sharp roll-off, wide tuning range, and extended stopband is presented in this letter. The proposed LPF consists of two fixed low-pass (LP) cells and a tunable bandstop (BS) cell loaded with two pairs of varactor diodes. The BS cell with tunable stopband edges is employed to achieve the reconfigurable cutoff frequency and sharp roll-off characteristics in the whole LPF. The fixed LP cells are utilized to suppress the high passband of the BS cell, which obtain the tunable LP filtering response and wide stopband. For experimental demonstration purposes, a microstrip prototype of the proposed reconfigurable LPF with a wide fractional tuning range of 78.8% and roll-off rate over 103 dB/GHz is simulated, fabricated, and measured. The wide stopband is extended up to 10 GHz with a rejection level better than 15 dB, and the overall dimension is <inline-formula> <tex-math notation="LaTeX">0.078\lambda _{\mathrm {g}} \times 0.08\lambda _{\mathrm {g}} </tex-math></inline-formula>. This physical size is comparable to more compact, prior art reconfigurable LPFs while featuring among the sharpest roll-off rate ever reported.</abstract><cop>PISCATAWAY</cop><pub>IEEE</pub><doi>10.1109/LMWC.2020.2997099</doi><tpages>4</tpages><orcidid>https://orcid.org/0000-0003-4750-1905</orcidid><orcidid>https://orcid.org/0000-0002-1252-0586</orcidid><orcidid>https://orcid.org/0000-0002-0717-894X</orcidid></addata></record> |
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| subjects | Bandstop (BS) Cutoff frequency Engineering Engineering, Electrical & Electronic Equivalent circuits Low pass filters low-pass filter (LPF) reconfigurable filter Reconfiguration Resonators roll-off Scattering parameters Science & Technology Technology Tuning Varactor diodes Varactors Wireless communication |
| title | Reconfigurable Low-Pass Filter With Sharp Roll-Off and Wide Tuning Range |
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