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Millimeter‐wave bandpass filter in bilateral finline with window‐cut resonators
Author(s) -
Koul S. K.,
Bhat B.
Publication year - 1997
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19971220)16:6<332::aid-mop3>3.0.co;2-l
Subject(s) - passband , band pass filter , insertion loss , resonator , stopband , materials science , center frequency , filter (signal processing) , optics , prototype filter , microwave , elliptic filter , optoelectronics , acoustics , electrical engineering , low pass filter , physics , telecommunications , engineering
An E ‐plane bandpass filter in bilateral finline featuring minimum insertion loss in the passband is proposed. The filter consists of a cascade of inductive strips and window‐cut half‐wave resonators formed by cutting out the dielectric substrate in the region of the resonator sections. It is demonstrated that such filters can be designed using the closed‐form expressions available for the metal insert filters. A typical Ka ‐band filter realized with five window‐cut resonator elements offers typically 1 dB insertion loss over a passband of about 0.5 GHz and a stopband rejection of greater than 50 dB at ±0.75 GHz away from the center frequency. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 16: 332–334, 1997