A Millimeter Wave Filter Using the Whispering-Gallery Mode Dielectric Resonators Coupled Laterally

Yosuke SATO
Yoshinori KOGAMI

Publication
IEICE TRANSACTIONS on Electronics   Vol.E88-C    No.7    pp.1440-1447
Publication Date: 2005/07/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.7.1440
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Technologies of Microwave and Millimeter-Wave Devices Focusing on Miniaturization and Advancement in Performance with Their Applications)
Category: Resonators & Filters
Keyword: 
millimeter wave filter,  dielectric disk resonator,  whispering gallery mode,  resonator design,  

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Summary: 
A millimeter wave BPF constructed from the WG mode dielectric disk resonators is presented. The design chart for the high Q WG mode resonator is obtained from Qu calculation of some WG modes. By using the design chart, high Q WG mode resonator having no influence of unwanted higher order resonances is designed. Designed resonators have different diameter and various Resonance Frequency Separation respectively. A 3 stage maximally flat BPF is constructed so that each resonator may be coupled laterally on the edge of the disk. Designed center frequency is 62.47 GHz and 3 dB bandwidth is 100 MHz. As a result, this BPF has insertion loss of 1.5 dB and some spurious responses which were existed conventional WG mode BPF are reduced considerably.