Open AccessMicrowave waveguide filter with broadside wall slots
Author(s) -
Shang Xiaobang,
Lancaster Michael J.,
Dimov Stefan
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.4383
Subject(s) - waveguide filter , broadside , waveguide , microwave , bandwidth (computing) , optics , materials science , filter (signal processing) , radiation , optoelectronics , acoustics , prototype filter , engineering , physics , low pass filter , telecommunications , electrical engineering
An investigation into rectangular waveguide filters with open slots on the broad side walls is reported. This type of waveguide filter eliminates the need for direct contact between the two waveguide halves and intentionally leaves a gap in the middle of broad side walls. For X‐band (8.2–12.4 GHz) waveguides, such a gap can be nearly as wide as 9% of the internal waveguide width a , without introducing any significant radiation loss. A fifth‐order filter centred at 10 GHz with a fractional bandwidth of 2% is designed based on such a structure, and fabricated from aluminium and tested. There is good agreement between measurement and simulation results. This verifies the proposed structure as well as the design procedure.