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Impedance‐matching technique for a latching ferrite variable polarizer in a circular waveguide
Author(s) -
Che Wenquan,
Yung Edward KaiNing,
Sha Kan
Publication year - 2000
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 - 10.1002/1098-2760(20001205)27:5<366::aid-mop21>3.0.co;2-7
Subject(s) - impedance matching , polarizer , microwave , ferrite (magnet) , electrical impedance , transformer , optics , matching (statistics) , materials science , quarter wave impedance transformer , bandwidth (computing) , waveguide , electronic engineering , acoustics , engineering , electrical engineering , physics , mathematics , telecommunications , voltage , damping factor , birefringence , statistics
Abstract A study is conducted on an impedance‐matching technique for the latching ferrite variable polarizer in a circular cylindrical waveguide. Using the mode‐matching method, a formula is developed for the calculation of the design parameters of a λ/4 impedance‐matching transformer. Excellent agreement is observed between the analytical result and measurement. Furthermore, an improved impedance‐matching technique is introduced to increase the bandwidth from 4.06 to 14.5%. This provides qualitative guidance for the design of analogous devices. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 366–368, 2000.