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Broadband microstrip phase shifters employing parallel stubs and ground slots
Author(s) -
Bialkowski Marek,
Wang Yifan
Publication year - 2011
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.25825
Subject(s) - phase shift module , microstrip , broadband , microwave , phase (matter) , return loss , planar , transmission line , insertion loss , frequency band , engineering , radio spectrum , electrical engineering , electronic engineering , materials science , optoelectronics , telecommunications , physics , computer science , bandwidth (computing) , computer graphics (images) , quantum mechanics , antenna (radio)
This letter describes the design of broadband microstrip phase shifters employing parallel stubs loading a main transmission line.To make these devices fully planar, a virtual short and ground slots terminating the stubs are used. The proposed design is demonstrated in examples of 45° and 22.5° phase shifters. Full‐wave simulation results show that the designed 45° phase shifter exhibits a phase shift of 45° ± 5° over the frequency band of 3–11 GHz while the 22.5° phase shifter exhibits a phase shift of 22.5° ± 2.5° over the frequency band of 3.7 to 11 GHz. These are accompanied by the return loss of about 10 dB across the same frequency ranges. The simulated performance is confirmed by experimental results which illustrate a phase shift of 45° ± 6.5° for the 45° phase shifter and 22.5° ± 2.6° for the 45° phase shifter over the frequency band of 3–11 GHz. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:723–728, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25825