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Theory and modeling of bandpass filters in waveguide using thin ferrite layers
Author(s) -
Bernhard J. T.,
Joines W. T.
Publication year - 1998
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(19980605)18:2<117::aid-mop9>3.0.co;2-d
Subject(s) - band pass filter , microwave , waveguide filter , capacitive sensing , planar , waveguide , materials science , ferrite (magnet) , equivalent circuit , electronic engineering , optoelectronics , electrical engineering , acoustics , engineering , filter (signal processing) , prototype filter , computer science , low pass filter , physics , telecommunications , voltage , computer graphics (images)
This work examines the use of thin ferrite layers to form circuit components in a waveguide. The planar layers are positioned perpendicular to the waveguide axis. A unique lumped‐element circuit model for a thin layer is developed, and practical limitations on operating frequency ranges are outlined. The circuit model is used to design bandpass filters in a waveguide with prescribed frequency responses. These waveguide filters are useful in applications where capacitive posts or inductive diaphragms are infeasible. EEsof © simulations of a filter are presented, and directions for further investigation are discussed. © 1998 John Wiley & Sons, Inc. Microwave Opt Technol Lett 18: 117–120, 1998.