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Broadband compact 180° phase shifter based on dumbbell shaped slow wave line
Author(s) -
Xu Liqiang,
Yan Binyu,
Liu Changjun
Publication year - 2020
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/mop.32403
Subject(s) - phase shift module , broadband , miniaturization , stub (electronics) , return loss , dumbbell , bandwidth (computing) , phase difference , insertion loss , materials science , optics , electronic engineering , electrical engineering , engineering , optoelectronics , physics , telecommunications , medicine , physical therapy , antenna (radio)
This paper presents a compact 180° phase shifter with flat phase difference in a wide bandwidth. It is a hybrid structure based on a stub‐loaded line and a switched‐line phase shifter, in which a kind of periodic dumbbell‐shaped slow wave line and T‐shaped short‐ended stub are introduced for miniaturization. The proposed configuration shows a better broadband performance and compact geometric dimension compared with traditional phase shifters. The fractional bandwidths of the proposed structure defined by the return loss of 10 dB and the phase deviation of ±5° were 96% and 77%, respectively.