Title :
LTCC-MLC duplexer for DCS-1800
Author_Institution :
Comput. & Commun. Res. Lab., Ind. Technol. Res. Inst., Hsinchu, Taiwan
fDate :
9/1/1999 12:00:00 AM
Abstract :
A low-temperature cofired-ceramic (LTCC) multilayer-ceramic (MLC) duplexer is presented in this paper. The duplexer is designed for a DCS-1800 handset. It is constructed using a multilayer laminated bandpass filter and a multilayer laminated bandstop filter. These two filters are capable of easy tuning after duplexer manufacture. The computer-aided design flowchart is also presented. Additionally, the tuning method and loss improvements of the duplexer are discussed. Measured results show the performance of the LTCC-MLC duplexer is acceptable for DCS-1800 applications
Keywords :
UHF filters; band-pass filters; band-stop filters; cellular radio; ceramic capacitors; circuit CAD; circuit tuning; telephone sets; 1.8 GHz; DCS-1800 handset; LTCC-MLC duplexer; computer-aided design flowchart; conductor loss; loss improvements; low-temperature cofired-ceramic multilayer-ceramic duplexer; multilayer laminated bandpass filter; multilayer laminated bandstop filter; tuning; Band pass filters; Ceramics; Circuits; Coaxial components; Design automation; Dielectrics; Digital filters; Microwave filters; Radio frequency; Resonator filters;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
