Open AccessCompact broadband balun‐based UWB‐BPF with minimum insertion loss and sharp selectivity
Author(s) -
Ghazali A.N.,
Sazid M.,
Pal S.
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.2015.0958
Subject(s) - passband , balun , insertion loss , broadband , ground plane , band pass filter , microstrip , materials science , planar , ultra wideband , physics , optoelectronics , wideband , acoustics , optics , telecommunications , computer science , antenna (radio) , computer graphics (images)
A novel and compact ultra‐wideband (UWB) bandpass filter (BPF) based on the broadband balun mechanism is proposed. The proposed structure is made up of two back‐to‐back open circuited meandered microstrip lines on the top plane coupled in a broadside fashion with a short circuited co‐planar waveguide in the ground. This configuration gives rise to a smooth UWB passband with an insertion loss of <0.19 dB in simulation and two transmission zeros at the lower and upper passband edges which provide sharp selectivity. To confirm the theory a prototype is fabricated and its measured response is found to be in close agreement with the simulated response. The proposed structure is very small in size measuring only 14.6 × 7.3 mm 2 .