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A Waveguide Compatible NRD Guide E-Plane Bandpass Filter for 55 GHz Band OFDM Applications
Takashi SHIMIZU Yuki KAWAHARA Takayuki NAKAGAWA Tsukasa YONEYAMA
Publication
IEICE TRANSACTIONS on Electronics
Vol.E90-C
No.9
pp.1729-1735 Publication Date: 2007/09/01 Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.9.1729 Print ISSN: 0916-8516 Type of Manuscript: Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology) Category: Passive Devices/Circuits Keyword: bandpass filter, NRD guide, NRD guide E-plane resonator, millimeter wave,
Full Text: PDF(673.7KB)>>
Summary:
A rectangular waveguide compatible NRD guide E-plane bandpass filter is proposed for 55 GHz band OFDM applications. The NRD guide E-plane bandpass filter is constructed by inserting a metal foil array in the E-plane of NRD guide. Simulation, fabrication, and handling of the filter are not difficult because each resonator is constructed by a couple of metal foils of a simple shape. A Chebyshev response 5-pole bandpass filter with a very narrow bandwidth of 550 MHz is designed and fabricated at 55 GHz band. Simulated and measured filter performances agree well with the design specifications. Insertion loss of the fabricated filter is found to be around 2.0 dB. Although temperature stability of the fabricated filter are found to be within manageable level, the adoption of cyclo olefin polymer can be one of solution for the temperature stability improvement.
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