Open AccessA Narrow Bandwidth Microstrip Band‐Pass Filter with Symmetrical Frequency Characteristics
Author(s) -
Jun Dong Suk,
Lee Hong Yeol,
Kim DongYoung,
Lee Sang Seok,
Nam Eun Soo
Publication year - 2005
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.05.0204.0069
Subject(s) - center frequency , bandwidth (computing) , microstrip , band pass filter , insertion loss , physics , passband , frequency band , electromagnetic shielding , electrical engineering , materials science , electronic engineering , optics , engineering , telecommunications
This letter proposes a band‐pass filter (BPF) with two transmission zeros based on a combination of parallel coupling and end coupling of half‐wave transmission lines. The fabricated BPF exhibited a narrow bandwidth and two transmission zeros near the pass‐band due to the end‐coupled and shielding waveguide. At the center operation frequency of 60 GHz, the 20 dB bandwidth of the BPF is 1.0 GHz, which is almost 2% of the center operation frequency, and the insertion loss is 3.12 dB. Two transmission zeros reach approximately 40 dB at 58.5 and 62.5 GHz. The simulation results almost agree with the measured results.