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

fYear

2015

fDate

March 30 2015-April 1 2015

Firstpage

1

Lastpage

3

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Symposium (IWS), 2015 IEEE International

Conference_Location

Shenzhen

Type

conf

DOI

10.1109/IEEE-IWS.2015.7164556

Filename

7164556