Title :
Compact dual-band semi-lumped bandpass filter with LTCC technology
Author :
Qian, K.W. ; Tang, X.H.
Author_Institution :
EHF Key Lab. of Fundamental Sci., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A novel low-temperature co-fired ceramic (LTCC) dual-band bandpass filter with compact size is reported. By using three semi-lumped resonators, not only the upper passband frequency can be conveniently tuned, but also the transmission zeros generated between the two passbands can be easily controlled by the elements of each resonator. A 2.5/5.2GHz dual-band experimental filter has been designed and fabricated to verify the proposed design concept. Based on the vertically-folded structure and LTCC technology, the filter only occupies an area of 5.1 × 4.6 × mm2.
Keywords :
UHF filters; UHF resonators; band-pass filters; ceramic packaging; lumped parameter networks; microwave filters; microwave resonators; resonator filters; LTCC technology; compact dual-band semilumped bandpass filter; frequency 2.5 GHz; frequency 5.2 GHz; low-temperature cofired ceramic; semilumped resonator; transmission zeros; upper passband frequency tuining; vertically-folded structure;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2011.1075
