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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
IEICE TRANSACTIONS on Electronics
Publication Date: 2003/08/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
dielectric resonator, image-type resonator, dielectric loss, conductor loss, unloaded Q,
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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.