Parallel Multimode Cavity Filters With Generalized Frequency Response
A generalized frequency response for cavity filters is demonstrated from six modes coupled in parallel. The six modes belong to two parallel-coupled triple-mode spheres and are coupled in parallel via two half-wavelength transmission-line resonators. The theory of phase and amplitude control of para...
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| Veröffentlicht in: | IEEE transactions on microwave theory and techniques 2019-05, Vol.67 (5), p.1844-1853 |
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| container_title | IEEE transactions on microwave theory and techniques |
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| creator | Hendry, David R. Abbosh, Amin M. |
| description | A generalized frequency response for cavity filters is demonstrated from six modes coupled in parallel. The six modes belong to two parallel-coupled triple-mode spheres and are coupled in parallel via two half-wavelength transmission-line resonators. The theory of phase and amplitude control of parallel couplings into spherical cavities is introduced by way of coupled resonator models, and the structure of two combined spheres is detailed. The theory and simulations prove that multiple transmission zeros can be arbitrarily placed, including inside the passband to create multiple bands and beyond infinity (imaginary frequencies) for flattened group delay. Several design examples of two spheres in parallel are presented to demonstrate a high degree of flexibility of transmission zero placement, and one example is fabricated and successfully tested. |
| doi_str_mv | 10.1109/TMTT.2019.2903470 |
| format | Article |
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The six modes belong to two parallel-coupled triple-mode spheres and are coupled in parallel via two half-wavelength transmission-line resonators. The theory of phase and amplitude control of parallel couplings into spherical cavities is introduced by way of coupled resonator models, and the structure of two combined spheres is detailed. The theory and simulations prove that multiple transmission zeros can be arbitrarily placed, including inside the passband to create multiple bands and beyond infinity (imaginary frequencies) for flattened group delay. Several design examples of two spheres in parallel are presented to demonstrate a high degree of flexibility of transmission zero placement, and one example is fabricated and successfully tested.</description><identifier>ISSN: 0018-9480</identifier><identifier>EISSN: 1557-9670</identifier><identifier>DOI: 10.1109/TMTT.2019.2903470</identifier><identifier>CODEN: IETMAB</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Cavity filter ; Cavity resonators ; Computer simulation ; Coupled modes ; Couplings ; Filtering theory ; Frequency response ; Group delay ; Holes ; parallel coupled ; Passband ; Probes ; Resonators ; spherical ; Transmission lines ; transmission zeros ; triple mode</subject><ispartof>IEEE transactions on microwave theory and techniques, 2019-05, Vol.67 (5), p.1844-1853</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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Several design examples of two spheres in parallel are presented to demonstrate a high degree of flexibility of transmission zero placement, and one example is fabricated and successfully tested.</description><subject>Cavity filter</subject><subject>Cavity resonators</subject><subject>Computer simulation</subject><subject>Coupled modes</subject><subject>Couplings</subject><subject>Filtering theory</subject><subject>Frequency response</subject><subject>Group delay</subject><subject>Holes</subject><subject>parallel coupled</subject><subject>Passband</subject><subject>Probes</subject><subject>Resonators</subject><subject>spherical</subject><subject>Transmission lines</subject><subject>transmission zeros</subject><subject>triple mode</subject><issn>0018-9480</issn><issn>1557-9670</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kE1Lw0AQhhdRsFZ_gHgJeE7dj2Q_jlJsFVoUiXhcNruzuCVN6m4q1F9vQotzGQaed2Z4ELoleEYIVg_VuqpmFBM1owqzQuAzNCFlKXLFBT5HE4yJzFUh8SW6SmkzjEWJ5QQ9vZlomgaabL1v-rDtHGRz8xP6Q7YITQ8xZZ-h_8qW0MIAhl9w2SLC9x5ae8jeIe26NsE1uvCmSXBz6lP0sXiq5s_56nX5Mn9c5ZYq1ue1sp5YaQ0X1tWU-ppx54g0hSrAeVJTLo3i1nhTe-FsWTIwyihFrONgPJui--PeXeyGF1KvN90-tsNJTcfCgjA5UORI2dilFMHrXQxbEw-aYD3a0qMtPdrSJ1tD5u6YCQDwz0suaKEE-wNu6Wfd</recordid><startdate>20190501</startdate><enddate>20190501</enddate><creator>Hendry, David R.</creator><creator>Abbosh, Amin M.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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| subjects | Cavity filter Cavity resonators Computer simulation Coupled modes Couplings Filtering theory Frequency response Group delay Holes parallel coupled Passband Probes Resonators spherical Transmission lines transmission zeros triple mode |
| title | Parallel Multimode Cavity Filters With Generalized Frequency Response |
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