Title :
Compact LTCC balun filter using folded half-wavelength resonators
Author :
Xiao Feng Liu ; Xiu Yin Zhang ; Kai-Xu Wang
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China
fDate :
March 30 2015-April 1 2015
Abstract :
This paper presents the design of compact balanced-to-unbalanced (balun) bandpass filters (BPFs) using the low temperature co-fired ceramic (LTCC) technology. Three coupled half wavelength transmission-line are used to form the proposed circuit. The balun filter is designed to work at the center frequency of 5.5GHz with the fractional bandwidth of 9.8%. The size of the circuit is only 2.2mm*2.7mm*1.2mm due to the LTCC multilayer structures. Good balun and filter responses are obtained in this design which verifies the theoretical predications.
Keywords :
baluns; band-pass filters; ceramic packaging; resonators; transmission lines; LTCC multilayer structures; compact LTCC balun filter; compact balanced-to-unbalanced bandpass filters; folded half-wavelength resonators; fractional bandwidth; frequency 5.5 GHz; low temperature co-fired ceramic technology; Frequency conversion; Lubricating oils; Passband; Resonant frequency; Resonator filters; Transmission lines; LTCC; balun filter; half-wavelength resonators; miniaturization;
Conference_Titel :
Wireless Symposium (IWS), 2015 IEEE International
Conference_Location :
Shenzhen
DOI :
10.1109/IEEE-IWS.2015.7164556
