A Novel 3-dB Waveguide Hybrid Coupler for Terahertz Operation
This letter presents our investigation into a 3-dB waveguide hybrid coupler of a novel structure in the submillimeter frequency band. The proposed coupler has only three coupling branches with a circular cutout at the top and the bottom on both sides of the main branch and is of compact size. The si...
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| Veröffentlicht in: | IEEE microwave and wireless components letters 2019-04, Vol.29 (4), p.273-275 |
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| container_title | IEEE microwave and wireless components letters |
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| creator | Niu, Zhongqian Zhang, Bo Ji, Dongfeng Yang, Yilin Liu, Yang Feng, Yinian Fan, Yong Chen, Zhe Chen, Xiaodong Li, Daotong |
| description | This letter presents our investigation into a 3-dB waveguide hybrid coupler of a novel structure in the submillimeter frequency band. The proposed coupler has only three coupling branches with a circular cutout at the top and the bottom on both sides of the main branch and is of compact size. The simulation shows that the proposed design has eased the machining difficulty by providing more tolerance to fabrication errors. The simulation also shows that the amplitude imbalance of the proposed hybrid branch is 25% less than that of the traditional three-branch hybrid structure. The proposed coupler structure is verified in experiment through measuring a fabricated 90° waveguide coupler at a center frequency of 195 GHz with approximately 13% bandwidth where the amplitude imbalance is less than 0.3 dB. The simulated and measured S-parameters have shown that the amplitude and phase imbalances are within 0.3 dB and 4°, respectively, with an isolation and return loss of 17 dB. |
| doi_str_mv | 10.1109/LMWC.2019.2899760 |
| format | Article |
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The proposed coupler has only three coupling branches with a circular cutout at the top and the bottom on both sides of the main branch and is of compact size. The simulation shows that the proposed design has eased the machining difficulty by providing more tolerance to fabrication errors. The simulation also shows that the amplitude imbalance of the proposed hybrid branch is 25% less than that of the traditional three-branch hybrid structure. The proposed coupler structure is verified in experiment through measuring a fabricated 90° waveguide coupler at a center frequency of 195 GHz with approximately 13% bandwidth where the amplitude imbalance is less than 0.3 dB. The simulated and measured S-parameters have shown that the amplitude and phase imbalances are within 0.3 dB and 4°, respectively, with an isolation and return loss of 17 dB.</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.2019.2899760</identifier><identifier>CODEN: IMWCBJ</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>3-dB waveguide hybrid ; Amplitudes ; Bandwidth ; Couplers ; directional coupler ; Electromagnetic waveguides ; Fabrication ; Frequencies ; good mechanical tolerance ; Hybrid structures ; Loss measurement ; Machining ; Simulation ; submillimeter-wave devices ; terahertz components ; Wireless communication</subject><ispartof>IEEE microwave and wireless components letters, 2019-04, Vol.29 (4), p.273-275</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c293t-3685d33fb8ce58fd33aabf2a5c4b434042259497f674af24622da9785a9d10353</citedby><cites>FETCH-LOGICAL-c293t-3685d33fb8ce58fd33aabf2a5c4b434042259497f674af24622da9785a9d10353</cites><orcidid>0000-0002-8119-5000 ; 0000-0002-1972-3271 ; 0000-0003-3055-2562 ; 0000-0003-4413-4847 ; 0000-0001-8852-3516</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/8663601$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,776,780,792,27901,27902,54733</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/8663601$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Niu, Zhongqian</creatorcontrib><creatorcontrib>Zhang, Bo</creatorcontrib><creatorcontrib>Ji, Dongfeng</creatorcontrib><creatorcontrib>Yang, Yilin</creatorcontrib><creatorcontrib>Liu, Yang</creatorcontrib><creatorcontrib>Feng, Yinian</creatorcontrib><creatorcontrib>Fan, Yong</creatorcontrib><creatorcontrib>Chen, Zhe</creatorcontrib><creatorcontrib>Chen, Xiaodong</creatorcontrib><creatorcontrib>Li, Daotong</creatorcontrib><title>A Novel 3-dB Waveguide Hybrid Coupler for Terahertz Operation</title><title>IEEE microwave and wireless components letters</title><addtitle>LMWC</addtitle><description>This letter presents our investigation into a 3-dB waveguide hybrid coupler of a novel structure in the submillimeter frequency band. The proposed coupler has only three coupling branches with a circular cutout at the top and the bottom on both sides of the main branch and is of compact size. The simulation shows that the proposed design has eased the machining difficulty by providing more tolerance to fabrication errors. The simulation also shows that the amplitude imbalance of the proposed hybrid branch is 25% less than that of the traditional three-branch hybrid structure. The proposed coupler structure is verified in experiment through measuring a fabricated 90° waveguide coupler at a center frequency of 195 GHz with approximately 13% bandwidth where the amplitude imbalance is less than 0.3 dB. The simulated and measured S-parameters have shown that the amplitude and phase imbalances are within 0.3 dB and 4°, respectively, with an isolation and return loss of 17 dB.</description><subject>3-dB waveguide hybrid</subject><subject>Amplitudes</subject><subject>Bandwidth</subject><subject>Couplers</subject><subject>directional coupler</subject><subject>Electromagnetic waveguides</subject><subject>Fabrication</subject><subject>Frequencies</subject><subject>good mechanical tolerance</subject><subject>Hybrid structures</subject><subject>Loss measurement</subject><subject>Machining</subject><subject>Simulation</subject><subject>submillimeter-wave devices</subject><subject>terahertz components</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>2019</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kD1PwzAURS0EEqXwAxCLJeYU28-fA0OJCkUqdCnqaDmJDalKE5ykUvn1JGrF9M5w733SQeiWkgmlxDws3tbphBFqJkwboyQ5QyMqhE6okvx8YKAJBWIu0VXTbAihXHM6Qo9T_F7t_RZDUjzhtdv7z64sPJ4fslgWOK26eusjDlXEKx_dl4_tL17WPbZltbtGF8FtG39zumP08TxbpfNksXx5TaeLJGcG2gSkFgVAyHTuhQ49OpcF5kTOMw6ccMaE4UYFqbgLjEvGCmeUFs4UlICAMbo_7tax-ul809pN1cVd_9IyRgCMVKD6FD2m8lg1TfTB1rH8dvFgKbGDJTtYsoMle7LUd-6OndJ7_5_XUoIkFP4AwFtg6Q</recordid><startdate>20190401</startdate><enddate>20190401</enddate><creator>Niu, Zhongqian</creator><creator>Zhang, Bo</creator><creator>Ji, Dongfeng</creator><creator>Yang, Yilin</creator><creator>Liu, Yang</creator><creator>Feng, Yinian</creator><creator>Fan, Yong</creator><creator>Chen, Zhe</creator><creator>Chen, Xiaodong</creator><creator>Li, Daotong</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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The proposed coupler has only three coupling branches with a circular cutout at the top and the bottom on both sides of the main branch and is of compact size. The simulation shows that the proposed design has eased the machining difficulty by providing more tolerance to fabrication errors. The simulation also shows that the amplitude imbalance of the proposed hybrid branch is 25% less than that of the traditional three-branch hybrid structure. The proposed coupler structure is verified in experiment through measuring a fabricated 90° waveguide coupler at a center frequency of 195 GHz with approximately 13% bandwidth where the amplitude imbalance is less than 0.3 dB. The simulated and measured S-parameters have shown that the amplitude and phase imbalances are within 0.3 dB and 4°, respectively, with an isolation and return loss of 17 dB.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/LMWC.2019.2899760</doi><tpages>3</tpages><orcidid>https://orcid.org/0000-0002-8119-5000</orcidid><orcidid>https://orcid.org/0000-0002-1972-3271</orcidid><orcidid>https://orcid.org/0000-0003-3055-2562</orcidid><orcidid>https://orcid.org/0000-0003-4413-4847</orcidid><orcidid>https://orcid.org/0000-0001-8852-3516</orcidid></addata></record> |
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| subjects | 3-dB waveguide hybrid Amplitudes Bandwidth Couplers directional coupler Electromagnetic waveguides Fabrication Frequencies good mechanical tolerance Hybrid structures Loss measurement Machining Simulation submillimeter-wave devices terahertz components Wireless communication |
| title | A Novel 3-dB Waveguide Hybrid Coupler for Terahertz Operation |
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