NRD Guide Excited Millimeter Wave Narrow Bandpass Filter Using Sapphire Disk Resonators

Takashi SHIMIZU  Yoshinori KOGAMI  

IEICE TRANSACTIONS on Electronics   Vol.E95-C    No.7    pp.1226-1230
Publication Date: 2012/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E95.C.1226
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
bandpass filter,  NRD guide,  Sapphire disk resonator,  millimeter wave,  

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Recent years, millimeter wave applications for wireless communication have attracted much attention and expected. We focused on an NRD guide and sapphire which have the excellent low loss characteristics in millimeter wave region. In this paper, an NRD guide excited sapphire disk resonator and millimeter wave bandpass filter with narrow bandwidth using proposed resonators were designed and fabricated. As a result, it was realized that the 3-pole bandpass filter with center frequency 58.64 GHz and 3 dB bandwidth 273 MHz. Moreover, its insertion loss was found to be about 1.5 dB.