Design of compact dual-passband LTCC filter exploiting stacked QMSIW and EMSIW

• Published in: Electronics letters Vol. 51; no. 12; pp. 912 - 914
• Main Authors: Zhang, Xiangjun, Ma, Caoyuan, Wang, Fei
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 11.06.2015
• Subjects: band‐pass filters; ceramic packaging; compact LTCC filter; dual‐pass‐band LTCC filter; eighth mode SIW; frequency 5.4 GHz; frequency 8.3 GHz; low‐temperature cofired ceramic filter; microwave filters; Microwave technology; quarter mode substrate integrated waveguide; stacked QMSIW‐EMSIW; substrate integrated waveguides; frequency 5.4 GHz; ceramic packaging; band-pass filters; frequency 8.3 GHz; compact LTCC filter; microwave filters; dual-pass-band LTCC filter; quarter mode substrate integrated waveguide; eighth mode SIW; stacked QMSIW-EMSIW; low-temperature cofired ceramic filter; substrate integrated waveguides
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2015.0391

A dual-passband low-temperature co-fired ceramic (LTCC) filter with a stacked quarter-mode substrate-integrated waveguide (QMSIW) and an eighth-mode SIW (EMSIW) on LTCC substrates is presented. By exploiting the QMSIW and EMSIW cavities, the filter has a dual passband with high selectivity and compact size. The experimental filter exhibits two passbands, one is centred at 5.4 GHz with an insertion loss of <1.7 dB, and a 3 dB bandwidth of 13%. The other is centred at 8.3 GHz with an insertion loss of <1.5 dB, and with a bandwidth of 12.9%. The volume of the filter is only 6.5 × 6.5 × 1.2 mm3.