Comments on "Reduced-length rat-race couplers"
For original paper see ibid., vol.50, no.12, p.2593-8. A rat-race coupler having three equal arms of arbitrary electrical length has been analyzed. It has been shown that an infinite number of solutions exist for the coupler design, some of them having lower electrical lengths than a conventional co...
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| Veröffentlicht in: | IEEE transactions on microwave theory and techniques 2008-06, Vol.56 (6), p.1501-1501 |
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| container_title | IEEE transactions on microwave theory and techniques |
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| creator | Aditya, S. Dutta Roy, S.C. |
| description | For original paper see ibid., vol.50, no.12, p.2593-8. A rat-race coupler having three equal arms of arbitrary electrical length has been analyzed. It has been shown that an infinite number of solutions exist for the coupler design, some of them having lower electrical lengths than a conventional coupler. Theoretical predictions have been verified by implementing, in microstrip technology, a 19λ/18 length coupler operating at 0.9 GHz. The purpose of this paper is to analysis general hybrid ring having sections of length λ/n, n integer, and obtained general expressions for the S-parameters. It was shown that the existing designs for 3-dB power division (i.e., the rat-race coupler) and for arbitrary power division, follow as special cases. Also presented was a general design method for the 3-dB hybrid-ring, which led to a number of new designs, many of them having smaller electrical circumferences. |
| doi_str_mv | 10.1109/TMTT.2008.923865 |
| format | Article |
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A rat-race coupler having three equal arms of arbitrary electrical length has been analyzed. It has been shown that an infinite number of solutions exist for the coupler design, some of them having lower electrical lengths than a conventional coupler. Theoretical predictions have been verified by implementing, in microstrip technology, a 19λ/18 length coupler operating at 0.9 GHz. The purpose of this paper is to analysis general hybrid ring having sections of length λ/n, n integer, and obtained general expressions for the S-parameters. It was shown that the existing designs for 3-dB power division (i.e., the rat-race coupler) and for arbitrary power division, follow as special cases. Also presented was a general design method for the 3-dB hybrid-ring, which led to a number of new designs, many of them having smaller electrical circumferences.</description><identifier>ISSN: 0018-9480</identifier><identifier>EISSN: 1557-9670</identifier><identifier>DOI: 10.1109/TMTT.2008.923865</identifier><identifier>CODEN: IETMAB</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Bandwidth ; Design methodology ; Directional couplers ; Impedance ; Microstrip ; Reflection</subject><ispartof>IEEE transactions on microwave theory and techniques, 2008-06, Vol.56 (6), p.1501-1501</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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A rat-race coupler having three equal arms of arbitrary electrical length has been analyzed. It has been shown that an infinite number of solutions exist for the coupler design, some of them having lower electrical lengths than a conventional coupler. Theoretical predictions have been verified by implementing, in microstrip technology, a 19λ/18 length coupler operating at 0.9 GHz. The purpose of this paper is to analysis general hybrid ring having sections of length λ/n, n integer, and obtained general expressions for the S-parameters. It was shown that the existing designs for 3-dB power division (i.e., the rat-race coupler) and for arbitrary power division, follow as special cases. Also presented was a general design method for the 3-dB hybrid-ring, which led to a number of new designs, many of them having smaller electrical circumferences.</description><subject>Bandwidth</subject><subject>Design methodology</subject><subject>Directional couplers</subject><subject>Impedance</subject><subject>Microstrip</subject><subject>Reflection</subject><issn>0018-9480</issn><issn>1557-9670</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kM9LwzAYhoMoOKd3wUvZPfXLryY5ytApTASp55CkiW5sbU3ag_-9HRVPHy887_vBg9AtgZIQ0Pf1a12XFECVmjJViTO0IEJIrCsJ52gBQBTWXMElusp5P0UuQC1Que6Ox9AOuejaYvUemtGHBh9C-zl8FckOOFkfCt-N_SGkvLpGF9Eecrj5u0v08fRYr5_x9m3zsn7YYk81DNhqzoW2jfSSaRY9b5yjzmpZURqdc-BpoIowIqmLzLqKKeWji4KzphFOsiVazbt96r7HkAez78bUTi-NqihRMO1PEMyQT13OKUTTp93Rph9DwJykmJMUc5JiZilT5W6u7EII_zgXhHAt2S9toFyd</recordid><startdate>200806</startdate><enddate>200806</enddate><creator>Aditya, S.</creator><creator>Dutta Roy, S.C.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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A rat-race coupler having three equal arms of arbitrary electrical length has been analyzed. It has been shown that an infinite number of solutions exist for the coupler design, some of them having lower electrical lengths than a conventional coupler. Theoretical predictions have been verified by implementing, in microstrip technology, a 19λ/18 length coupler operating at 0.9 GHz. The purpose of this paper is to analysis general hybrid ring having sections of length λ/n, n integer, and obtained general expressions for the S-parameters. It was shown that the existing designs for 3-dB power division (i.e., the rat-race coupler) and for arbitrary power division, follow as special cases. Also presented was a general design method for the 3-dB hybrid-ring, which led to a number of new designs, many of them having smaller electrical circumferences.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TMTT.2008.923865</doi><tpages>1</tpages></addata></record> |
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| subjects | Bandwidth Design methodology Directional couplers Impedance Microstrip Reflection |
| title | Comments on "Reduced-length rat-race couplers" |
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