Unloaded Q of Image-Type Dielectric Resonator: Its New Packaging Method in a Metal Shield

Ikuo AWAI  Hiroshi KUBO  Yoshihiro ISHII  Kazuki IWASHITA  Atsushi SANADA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.8   pp.1642-1648
Publication Date: 2003/08/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: 
Keyword: 
dielectric resonator,  image-type resonator,  dielectric loss,  conductor loss,  unloaded Q,  

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Summary: 
Unloaded Q of an image-type dielectric resonator is studied with the simulation and experiment. It is shown that a gap between the dielectric resonator and the shield case reduces both the dielectric loss and conductor loss. The gap moves the electric and magnetic field distributions in the different directions, so that the two losses are reduced. A half-cut image-type resonator with a dielectric spacer inserted into the gap is measured to verify the concept. The unloaded Q is improved by about two times from that without a gap. The proposed structure gives a new packaging method of a dielectric resonator.