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access icon free Miniaturised double-coaxial cavity resonator and duplexer with ZOR characteristic using air-core coils

  • Author(s): K.S. Kim 1 ; C.Y. Kim 1 ; D.O. Kim 2 ; J.G. Park 1 ; B.H. Koo 3 ; C.H. Lee 3
    • View affiliations
    • Affiliations: 1: School of Electronics Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 702-701, Republic of Korea;
      2: Wireless Power Transfer Technology Research Center, Korea Advanced Institute of Science and Technology, 193 Munji-Ro, Yuseong-gu, Daejeon 305-732, Republic of Korea;
      3: ADMOTECH Co. Ltd, 37-10, Techno 1-ro, Yuseong-gu, Daejeon 305-509, Republic of Korea
  • Source: Volume 49, Issue 22, 24 October 2013, p. 1393 – 1394
    DOI:  10.1049/el.2013.2151 , Print ISSN 0013-5194, Online ISSN 1350-911X
© The Institution of Engineering and Technology
Received 30/06/2013, Published
Errata or comment

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.

Inspec keywords: Q-factor; cavity resonators

Other keywords: miniaturised double-coaxial cavity resonator; air-core coils; duplexer; Q factor; zeroth-order resonance characteristics; ZOR characteristic

Subjects: Waveguide and microwave transmission line components

References

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