Open AccessCompact dual‐passband LTCC filter exploiting eighth‐mode SIW and SIW hybrid with coplanar waveguide
Author(s) -
Xiangjun Zhang,
Caoyuan Ma,
Deqiang Cheng
Publication year - 2014
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.2014.2555
Subject(s) - passband , bandwidth (computing) , coplanar waveguide , materials science , transition band , butterworth filter , insertion loss , band pass filter , optoelectronics , filter (signal processing) , prototype filter , electronic engineering , waveguide filter , optics , low pass filter , telecommunications , computer science , physics , electrical engineering , engineering , microwave
A compact dual‐passband low‐temperature ceramic con‐fired (LTCC) filter is proposed. Its electrical size is reduced by exploiting an eighth‐mode substrate integrated waveguide (SIW) and a conventional SIW hybrid with a coplanar waveguide (CPW). The filter is fabricated on multilayer ceramic, which makes the filter even more compact. The filter was fabricated and measured. The measured results show that the filter has dual‐passband, the first passband is centred at 8.0 GHz with 0.95 GHz 3 dB bandwidth, and the second passband is centred at 11.1 GHz with 0.41 GHz 3 dB bandwidth. The filter has low passband insertion and sharp roll‐off characteristics at the transition band. The volume of the filter is only 9.6 × 9.6 × 1.4 mm 3 .