60 GHz Bandpass Filter Using NRD Guide E-Plane Resonators

Takashi SHIMIZU  Tsukasa YONEYAMA  

IEICE TRANSACTIONS on Electronics   Vol.E89-C   No.12   pp.1851-1857
Publication Date: 2006/12/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.12.1851
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Emerging Microwave Techniques)
Category: Passive Circuits/Components
millimeter wave bandpass filter,  NRD-guide,  NRD guide E-plane resonator,  millimeter wave integrated circuits,  

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A novel structure of bandpass filter using NRD guide E-plane resonators is proposed. The NRD guide E-plane resonator is constructed by inserting metal foils in the E-plane of NRD guide. Simulation, fabrication and handling of the filter are very easy because each resonator is separated by simple metal foils. Chebyshev response bandpass filters are designed based on the theory of direct-coupled resonator filters and fabricated at 60 GHz. Simulated and measured filter performances agreed well with the design specifications. Insertion losses of the fabricated filters were found to be around 0.3 dB for 3-pole filter and 0.5 dB for 5-pole bandpass filter, respectively.