Title :
LTCC bandpass filter with transmission zeros using grounding inductor for RF applications
Author :
Zhuang, Suming ; Qin, Yali ; Liu, Kai ; Zhu, Guangxin
Author_Institution :
Inst. of Fiber-Opt. Commun. & Inf. Eng., Zhejiang Univ. of Technol., Hangzhou, China
fDate :
Nov. 29 2010-Dec. 2 2010
Abstract :
This paper proposes a third-order bandpass filter using low temperature co-fired ceramic (LTCC) technology. The filter employs two grounding inductors, connecting the two parallel LC resonators, to provide a transmission zero in the upper stopband. A feedback capacitor between input and output is also used to generate two transmission zeros. With the help of stepped-impedance resonators (SIR´s), the proposed filter has a compact size of 2.5mm×2.0mm×0.9mm. The insertion loss is less than 1.3dB from 2.40GHz to 2.50GHz in passband.
Keywords :
UHF filters; UHF resonators; band-pass filters; band-stop filters; capacitors; ceramic packaging; earthing; inductors; radiocommunication; LTCC bandpass filter; RF application; SIR; feedback capacitor; grounding inductor; low temperature co-fired ceramic technology; parallel LC resonator; stepped-impedance resonator; stopband filter; third-order bandpass filter; transmission zero;
Conference_Titel :
Antennas Propagation and EM Theory (ISAPE), 2010 9th International Symposium on
Conference_Location :
Guangzhou
Print_ISBN :
978-1-4244-6906-2
DOI :
10.1109/ISAPE.2010.5696674
