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Dispersion characteristics of LiTi‐Ferrite radome
Author(s) -
Saxeveen Kumar,
Kumar Nitendar,
Pourush P. K. S.
Publication year - 2010
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.24828
Subject(s) - radome , ferrite (magnet) , materials science , microwave , optics , ferrite core , electrical engineering , engineering , composite material , physics , antenna (radio) , telecommunications , electromagnetic coil
Abstract The dispersion characteristics of a magnetically switchable LiTi‐Ferrite radome is presented. A thin layer of LiTi‐ferrite is used as superstrate or radome layer, which control the radiation, reception, and scattering from a printed antenna or array by applying a DC magnetic bias field in the plane of the ferrite, orthogonal to the RF magnetic field. In this analysis, absorbing and transmission power coefficients are calculated to obtain the power loss in radome layer and transmitted power, respectively. The absorbing power coefficient verifies the switching behavior of radome for certain range of applied external magnetic field ( H o ), which depends on the resonance width parameter (Δ H ) of ferrite material. By properly choosing the bias field, quasi TEM wave propagation in the ferrite layer can be made to be zero or negative over a certain frequency range, results in a switching behavior in the ferrite layer. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 52–54, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24828