Open AccessSubstrate integrated waveguide filter with embedded mixed source–load coupling
Author(s) -
Xu Z.Q.,
Wang P.,
Qian K.W.,
Tian Z.
Publication year - 2013
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.2013.2572
Subject(s) - stopband , materials science , substrate (aquarium) , coupling (piping) , filter (signal processing) , waveguide , optoelectronics , ceramic , waveguide filter , prototype filter , low pass filter , resonator , engineering , composite material , electrical engineering , oceanography , geology
A compact substrate integrated waveguide (SIW) filter with an improved stopband using multilayer embedded mixed coupling (MC) is presented. By implementing MC into the input/output SIW, the filter not only exhibits good rejection for the upper stopband, owing to an additional controllable transmission zero, but also has a miniature size of 18 × 12 mm 2 by profiting from its low‐temperature co‐fired ceramic structure. An experimental second‐order filter with three TZs has been designed and fabricated. The measured results show good agreement with the simulated ones.