Open AccessMiniaturised double‐coaxial cavity resonator and duplexer with ZOR characteristic using air‐core coils
Author(s) -
Kim K.S.,
Kim C.Y.,
Kim D.O.,
Park J.G.,
Koo B.H.,
Lee C.H.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2013.2151
Subject(s) - duplexer , resonator , coaxial , miniaturization , materials science , helical resonator , q factor , core (optical fiber) , resonance (particle physics) , acoustics , electrical engineering , electronic engineering , optoelectronics , engineering , physics , antenna (radio) , composite material , particle physics
A novel method of miniaturising the size of a coaxial cavity resonator by utilising zeroth‐order resonance (ZOR) characteristics is presented. This miniaturisation has been achieved through the introduction of air‐core coils inside a conventional coaxial cavity resonator. This structure possesses ZOR characteristics, which results in the miniaturisation of the resonator while still exhibiting a reasonable high unloaded Q factor. A duplexer was designed and fabricated using the proposed resonator. The measurement results verified that a 30% reduction in size was achieved compared with a traditional duplexer.