Please use this identifier to cite or link to this item:
|Title:||Nonuniform transmission line codirectional couplers for hybrid mimic and superconductive applications|
|Authors:||Uysal, Sener |
Turner, Charles W.
|Source:||Uysal, Sener, Turner, Charles W., Watkins, John (1994-03). Nonuniform transmission line codirectional couplers for hybrid mimic and superconductive applications. IEEE Transactions on Microwave Theory and Techniques 42 (3) : 407-413. ScholarBank@NUS Repository. https://doi.org/10.1109/22.277434|
|Abstract:||A new design approach for thin-film codirectional quadrature couplers and their applications is described. An in-depth analysis and semi-empirical design curves are presented for these couplers. Forward-wave coupling is achieved by making use of the difference between even- and odd-mode phase velocities. Modified nonuniform codirectional couplers with a dummy channel for continuously decreasing or increasing taper and employing wiggly, serpentined and smooth coupled edges have been designed and tested. It is found that a wiggly coupler can achieve a 50% length reduction compared to a smooth-edge coupler. A further 60% length reduction compared to a wiggly coupler is achieved by a serpentine coupler. Coupler performance for wiggly and serpentined configurations is computed by choosing a realizable phase velocity function for a given coupler length. Either constant 90° or -90° phase shift is possible with these couplers giving significant design flexibility in some applications. The results for a Ku-band Σ-Δ Magic-T circuit employing a 0 dB wiggly coupler and a -3 dB smooth-edge coupler are also presented in the paper.|
|Source Title:||IEEE Transactions on Microwave Theory and Techniques|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 14, 2018
WEB OF SCIENCETM
checked on Jan 24, 2018
checked on Feb 19, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.