Premium
Design of compact L ‐band 180° phase shifters
Author(s) -
Bialkowski M. E.,
Karmakar N. C.
Publication year - 1999
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19990720)22:2<144::aid-mop19>3.0.co;2-d
Subject(s) - phase shift module , microwave , diode , phase (matter) , engineering , electronic engineering , compensation (psychology) , phase compensation , pin diode , ultra high frequency , electrical engineering , telecommunications , physics , phase noise , psychology , quantum mechanics , psychoanalysis
The practical design of L‐band 180° phase shifters faces two problems. One is associated with the size, and the other with the cost. This paper presents the design of two varieties of 180° phase shifters that minimize the size and manufacturing cost. The first variety is a hybrid‐coupled phase shifter whose size is reduced by employing a compact 3 dB branch‐line coupler. The second variety is a switched‐branch‐line phase shifter, which uses only two diodes to perform its function. Both phase shifters employ low‐cost UHF diodes in their switching networks. An LC compensation technique is applied to make the diodes good‐quality on–off switches in the L‐band. Using these compensation methods, low‐cost, good‐quality compact 180° phase shifters are developed. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 22: 144–148, 1999.