A film bulk acoustic resonator (FBAR) duplexer for USPCS handset applications

Author

Bradley, P. ; Ruby, R. ; Larson, J.D., III ; Oshmyansky, Y. ; Figueredo, D.

Author_Institution

Agilent Technol., Newark, CA, USA

Volume

1

fYear

2001

fDate

20-24 May 2001

Firstpage

367

Abstract

We will describe the design and measured performance of a duplexer based on film bulk acoustic resonators (FBARs) for the 1900 MHz PCS cellular phone market. Typical specifications for the duplexer require the Tx filter to attenuate frequencies in the Rx band by >40 dB while maintaining a worst-case insertion loss of 3.5 dB over the Tx band. VSWR must be better than 2.2 in the pass-band (8.5 dB return loss). The Rx filter must attenuate the Tx frequencies by >50 dB while maintaining a worst-case insertion loss of 4.2 dB in the Rx band. Again, VSWR must be better than 2.2.

Keywords

S-parameters; UHF filters; acoustic resonator filters; bulk acoustic wave devices; cellular radio; equivalent circuits; ladder filters; multiplexing equipment; passive filters; 1900 MHz; 3.5 dB; 4.2 dB; 8.5 dB; PCS cellular phone; Rx band; Rx filter; S-parameters; Tx band; Tx filter; USPCS handset applications; VSWR; equivalent circuit model; film bulk acoustic resonator duplexer; ladder filters; passive components; return loss; worst-case insertion loss; Equivalent circuits; Film bulk acoustic resonators; Impedance; Insertion loss; Personal communication networks; Resonance; Resonant frequency; Resonator filters; Switches; Telephone sets;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2001 IEEE MTT-S International

Conference_Location

Phoenix, AZ, USA

ISSN

0149-645X

Print_ISBN

0-7803-6538-0

Type

conf

DOI

10.1109/MWSYM.2001.966908

Filename

966908