Stepped-Impedance Coupled Resonators for Implementation of Parallel Coupled Microstrip Filters With Spurious Band Suppression
A parallel-coupled microstrip bandpass filter based on the stepped-impedance coupled resonator (SICR) for suppression of harmonic spurious response is presented. The SICR relies upon the incorporation of different stepped impedances for the even and odd propagation modes of the coupled microstrip li...
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| Veröffentlicht in: | IEEE transactions on microwave theory and techniques 2012-06, Vol.60 (6), p.1540-1548 |
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| container_title | IEEE transactions on microwave theory and techniques |
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| creator | Worapishet, A. Srisathit, K. Surakampontorn, W. |
| description | A parallel-coupled microstrip bandpass filter based on the stepped-impedance coupled resonator (SICR) for suppression of harmonic spurious response is presented. The SICR relies upon the incorporation of different stepped impedances for the even and odd propagation modes of the coupled microstrip lines. This is to align the modal parallel resonance frequencies, and thereby effectively equalize the modal phase velocities. Its structural simplicity enables closed-form analytical formulation, and the derived equations are effectively utilized to explicitly guide parameters selection based on classical synthesis methodology of coupled microstrip filters. Practical feasibility of the SICR and the integrity of the analysis are demonstrated via designs and implementations of two third-order 0.01-dB ripple Chebyshev bandpass filters with a passband center frequency of 2.0 GHz and 3-dB fractional bandwidths of 15% and 25%. Good agreement between design, simulation, and measurement is obtained, where suppressions of the first harmonic spurious responses by more than 40 dB are achieved in both filters. |
| doi_str_mv | 10.1109/TMTT.2012.2190743 |
| format | Article |
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The SICR relies upon the incorporation of different stepped impedances for the even and odd propagation modes of the coupled microstrip lines. This is to align the modal parallel resonance frequencies, and thereby effectively equalize the modal phase velocities. Its structural simplicity enables closed-form analytical formulation, and the derived equations are effectively utilized to explicitly guide parameters selection based on classical synthesis methodology of coupled microstrip filters. Practical feasibility of the SICR and the integrity of the analysis are demonstrated via designs and implementations of two third-order 0.01-dB ripple Chebyshev bandpass filters with a passband center frequency of 2.0 GHz and 3-dB fractional bandwidths of 15% and 25%. Good agreement between design, simulation, and measurement is obtained, where suppressions of the first harmonic spurious responses by more than 40 dB are achieved in both filters.</description><identifier>ISSN: 0018-9480</identifier><identifier>EISSN: 1557-9670</identifier><identifier>DOI: 10.1109/TMTT.2012.2190743</identifier><identifier>CODEN: IETMAB</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Applied sciences ; Bandpass filters ; Circuit properties ; Design engineering ; Electric, optical and optoelectronic circuits ; Electronic circuits ; Electronics ; Exact sciences and technology ; Exact solutions ; Frequency filters ; Harmonic suppression ; Harmonics ; Impedance ; Layout ; Mathematical analysis ; microstrip filter ; Microstrip filters ; Microstrip resonators ; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits ; nonuniform coupled microstrip line ; Oscillators, resonators, synthetizers ; Passband ; Resonant frequency ; Resonators ; Ripples ; Stepped ; stepped-impedance resonator (SIR)</subject><ispartof>IEEE transactions on microwave theory and techniques, 2012-06, Vol.60 (6), p.1540-1548</ispartof><rights>2015 INIST-CNRS</rights><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Jun 2012</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c356t-74983399834173074d9f439905645a3fbf3cd8f62da569b74bd4b3b9571e970f3</citedby><cites>FETCH-LOGICAL-c356t-74983399834173074d9f439905645a3fbf3cd8f62da569b74bd4b3b9571e970f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/6185706$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,777,781,793,27905,27906,54739</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/6185706$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25982673$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Worapishet, A.</creatorcontrib><creatorcontrib>Srisathit, K.</creatorcontrib><creatorcontrib>Surakampontorn, W.</creatorcontrib><title>Stepped-Impedance Coupled Resonators for Implementation of Parallel Coupled Microstrip Filters With Spurious Band Suppression</title><title>IEEE transactions on microwave theory and techniques</title><addtitle>TMTT</addtitle><description>A parallel-coupled microstrip bandpass filter based on the stepped-impedance coupled resonator (SICR) for suppression of harmonic spurious response is presented. The SICR relies upon the incorporation of different stepped impedances for the even and odd propagation modes of the coupled microstrip lines. This is to align the modal parallel resonance frequencies, and thereby effectively equalize the modal phase velocities. Its structural simplicity enables closed-form analytical formulation, and the derived equations are effectively utilized to explicitly guide parameters selection based on classical synthesis methodology of coupled microstrip filters. Practical feasibility of the SICR and the integrity of the analysis are demonstrated via designs and implementations of two third-order 0.01-dB ripple Chebyshev bandpass filters with a passband center frequency of 2.0 GHz and 3-dB fractional bandwidths of 15% and 25%. Good agreement between design, simulation, and measurement is obtained, where suppressions of the first harmonic spurious responses by more than 40 dB are achieved in both filters.</description><subject>Applied sciences</subject><subject>Bandpass filters</subject><subject>Circuit properties</subject><subject>Design engineering</subject><subject>Electric, optical and optoelectronic circuits</subject><subject>Electronic circuits</subject><subject>Electronics</subject><subject>Exact sciences and technology</subject><subject>Exact solutions</subject><subject>Frequency filters</subject><subject>Harmonic suppression</subject><subject>Harmonics</subject><subject>Impedance</subject><subject>Layout</subject><subject>Mathematical analysis</subject><subject>microstrip filter</subject><subject>Microstrip filters</subject><subject>Microstrip resonators</subject><subject>Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits</subject><subject>nonuniform coupled microstrip line</subject><subject>Oscillators, resonators, synthetizers</subject><subject>Passband</subject><subject>Resonant frequency</subject><subject>Resonators</subject><subject>Ripples</subject><subject>Stepped</subject><subject>stepped-impedance resonator (SIR)</subject><issn>0018-9480</issn><issn>1557-9670</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpdkU-LFDEQxYMoOK5-APESEMFLj0nn_1GHXXdhF8UZ8dikuyuYJdNpk_TBg9_dNDPMYS8Vivzeo6oeQm8p2VJKzKfDw-GwbQltty01RHH2DG2oEKoxUpHnaEMI1Y3hmrxEr3J-rC0XRG_Qv32BeYaxuTvWaqcB8C4uc4AR_4AcJ1tiytjFhCsQ4AhTscXHCUeHv9tkQ4BwUTz4IcVckp_xjQ8FqvKXL7_xfl6Sj0vGX-w04v0yzwlyri6v0QtnQ4Y35_cK_by5Puxum_tvX-92n--bgQlZGsWNZszUwqlidbvROF57IiQXlrnesWHUTrajFdL0ivcj71lvhKJgFHHsCn08-c4p_lkgl-7o8wAh2AnqXB2Vigol6v0q-v4J-hiXNNXpOko0lZS3QleKnqh14ZzAdXPyR5v-VqhbA-nWQLo1kO4cSNV8ODvbPNjgUr22zxdhK4xupVq5dyfOA8DlW1ItFJHsP3hnlI0</recordid><startdate>20120601</startdate><enddate>20120601</enddate><creator>Worapishet, A.</creator><creator>Srisathit, K.</creator><creator>Surakampontorn, W.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>20120601</creationdate><title>Stepped-Impedance Coupled Resonators for Implementation of Parallel Coupled Microstrip Filters With Spurious Band Suppression</title><author>Worapishet, A. ; Srisathit, K. ; Surakampontorn, W.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c356t-74983399834173074d9f439905645a3fbf3cd8f62da569b74bd4b3b9571e970f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Applied sciences</topic><topic>Bandpass filters</topic><topic>Circuit properties</topic><topic>Design engineering</topic><topic>Electric, optical and optoelectronic circuits</topic><topic>Electronic circuits</topic><topic>Electronics</topic><topic>Exact sciences and technology</topic><topic>Exact solutions</topic><topic>Frequency filters</topic><topic>Harmonic suppression</topic><topic>Harmonics</topic><topic>Impedance</topic><topic>Layout</topic><topic>Mathematical analysis</topic><topic>microstrip filter</topic><topic>Microstrip filters</topic><topic>Microstrip resonators</topic><topic>Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits</topic><topic>nonuniform coupled microstrip line</topic><topic>Oscillators, resonators, synthetizers</topic><topic>Passband</topic><topic>Resonant frequency</topic><topic>Resonators</topic><topic>Ripples</topic><topic>Stepped</topic><topic>stepped-impedance resonator (SIR)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Worapishet, A.</creatorcontrib><creatorcontrib>Srisathit, K.</creatorcontrib><creatorcontrib>Surakampontorn, W.</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>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>IEEE transactions on microwave theory and techniques</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Worapishet, A.</au><au>Srisathit, K.</au><au>Surakampontorn, W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Stepped-Impedance Coupled Resonators for Implementation of Parallel Coupled Microstrip Filters With Spurious Band Suppression</atitle><jtitle>IEEE transactions on microwave theory and techniques</jtitle><stitle>TMTT</stitle><date>2012-06-01</date><risdate>2012</risdate><volume>60</volume><issue>6</issue><spage>1540</spage><epage>1548</epage><pages>1540-1548</pages><issn>0018-9480</issn><eissn>1557-9670</eissn><coden>IETMAB</coden><abstract>A parallel-coupled microstrip bandpass filter based on the stepped-impedance coupled resonator (SICR) for suppression of harmonic spurious response is presented. The SICR relies upon the incorporation of different stepped impedances for the even and odd propagation modes of the coupled microstrip lines. This is to align the modal parallel resonance frequencies, and thereby effectively equalize the modal phase velocities. Its structural simplicity enables closed-form analytical formulation, and the derived equations are effectively utilized to explicitly guide parameters selection based on classical synthesis methodology of coupled microstrip filters. Practical feasibility of the SICR and the integrity of the analysis are demonstrated via designs and implementations of two third-order 0.01-dB ripple Chebyshev bandpass filters with a passband center frequency of 2.0 GHz and 3-dB fractional bandwidths of 15% and 25%. Good agreement between design, simulation, and measurement is obtained, where suppressions of the first harmonic spurious responses by more than 40 dB are achieved in both filters.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TMTT.2012.2190743</doi><tpages>9</tpages></addata></record> |
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| subjects | Applied sciences Bandpass filters Circuit properties Design engineering Electric, optical and optoelectronic circuits Electronic circuits Electronics Exact sciences and technology Exact solutions Frequency filters Harmonic suppression Harmonics Impedance Layout Mathematical analysis microstrip filter Microstrip filters Microstrip resonators Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits nonuniform coupled microstrip line Oscillators, resonators, synthetizers Passband Resonant frequency Resonators Ripples Stepped stepped-impedance resonator (SIR) |
| title | Stepped-Impedance Coupled Resonators for Implementation of Parallel Coupled Microstrip Filters With Spurious Band Suppression |
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