Title :
Design of Rx filter for WCDMA direct-conversion front-end using FBAR technology
Author :
Jin, H. ; Dong, S.R. ; Wang, D.M.
Author_Institution :
Dept. of Inf. Sci.&Electron. Eng., Zhejiang Univ., Hangzhou
Abstract :
We present an Rx filter based on thin film bulk acoustic resonator (FBAR) technology for the wide-band code division multiple access (WCDMA) direct-conversion front-end applications. The filter, which consists of two lattice sections and one ladder section, provides deep rejection at stop-band, particularly at transmitter band (1920-1980 MHz), and steep roll-off at pass-band edges. The typical broadband rejection is better than 60 dB. The simulated result is compared with the up-to-date SAW filter, and demonstrates the excellent characteristics of the new FBAR filter. The small size, low in-band insertion loss, sharp roll-off, high stop-band rejection, good temperature stability, and compatibility with semiconductor processing make this FBAR filter an ideal choice for WCDMA Rx filter applications
Keywords :
Ge-Si alloys; UHF filters; UHF integrated circuits; acoustic resonator filters; band-pass filters; broadband networks; code division multiple access; integrated circuit design; radio receivers; semiconductor materials; 1920 to 1980 MHz; FBAR technology; Rx filter; SiGe; WCDMA; broadband rejection; direct-conversion front-end; film bulk acoustic resonator; high stop-band rejection; in-band insertion loss; pass-band edges; sharp roll-off; temperature stability; wide-band code division multiple access;
Conference_Titel :
Mobile Technology, Applications and Systems, 2005 2nd International Conference on
Conference_Location :
Guangzhou
Print_ISBN :
981-05-4573-8
DOI :
10.1109/MTAS.2005.243792
