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Microrectangular‐coaxial phase shifter for microwave devices
Author(s) -
Sholiyi Olusegun,
Williams John D.
Publication year - 2015
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20885
Subject(s) - phase shift module , hfss , return loss , insertion loss , ferrite (magnet) , microwave , materials science , coaxial , circulator , conductor , anisotropy , ku band , electrical engineering , optics , engineering , optoelectronics , physics , telecommunications , antenna (radio) , microstrip antenna , composite material
ABSTRACT This article reports the simulated performance of rectangular coaxial ferrite phase shifter at Ka‐band. The proposed technique exploits rectangular coaxial waveguide with a symmetrically placed inner signal conductor inside an outer conductor connected to the ground. Strontium ferrite‐SU8 composite is used as an anisotropic material of choice in the modeled design. Two model phase shifting structures were designed for reciprocal and nonreciprocal applications using High Frequency Structure Simulator, HFSS. The reciprocal model produced a tunable phase shift of almost60 ° / c m across 0 to 400 kA/m applied field and at 1800 Gauss. The predicted simulated performance of the nonreciprocal phase shifter was20 ° / c m from a reference phase of24 °at 0 A/m at the same saturation magnetization. A return loss better than 20 dB and an insertion loss less than 1.5 dB were predicted for the two models. © 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:502–509, 2015.