Novel 1-chip FBAR filter for wireless handsets

Byeoungju Ha, Insang Song, Yunkwon Park, Duckhwan Kim, Woonbae Kim, Kuangwoo Nam, James Jungho Pak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Thin film bulk acoustic resonators, or FBARs, are surely a technical breakthrough for the miniaturization of RF filters and for the integration with other RF components. However, there are few problems of limitation in the size reduction and the difficulties in monolithic integration, because FBARs and auxiliary circuits are still manufactured separately and assembled using wire bonding process. Therefore, we establish for the first time a novel monolithic 1-chip transmit (Tx) filter that can be achieved with a minimum size of 1 mm × 1 mm x 0.8 mm using a suspended membrane FBAR, a integrated inductor, and wafer level packaging for 1900 MHz PCS handsets. The 1-chip filter has an insertion loss less than 2.86 dB in the pass band (1850 - 1910MHz) of US PCS Handsets. Attenuation characteristics is measured to show excellent performance at over 35 dB in Rx band (1930 - 1990 MHz) and over 25 dB in the below 1800MHz range

Original languageEnglish
Title of host publicationTRANSDUCERS '05 - 13th International Conference on Solid-State Sensors and Actuators and Microsystems - Digest of Technical Papers
Pages2069-2073
Number of pages5
Publication statusPublished - 2005
Event13th International Conference on Solid-State Sensors and Actuators and Microsystems, TRANSDUCERS '05 - Seoul, Korea, Republic of
Duration: 2005 Jun 52005 Jun 9

Publication series

NameDigest of Technical Papers - International Conference on Solid State Sensors and Actuators and Microsystems, TRANSDUCERS '05
Volume2

Other

Other13th International Conference on Solid-State Sensors and Actuators and Microsystems, TRANSDUCERS '05
CountryKorea, Republic of
CitySeoul
Period05/6/505/6/9

Keywords

  • 1-Chip filter
  • FBAR
  • Trimming inductor
  • Wafer level packaging

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Ha, B., Song, I., Park, Y., Kim, D., Kim, W., Nam, K., & Pak, J. J. (2005). Novel 1-chip FBAR filter for wireless handsets. In TRANSDUCERS '05 - 13th International Conference on Solid-State Sensors and Actuators and Microsystems - Digest of Technical Papers (pp. 2069-2073). [4C2.4] (Digest of Technical Papers - International Conference on Solid State Sensors and Actuators and Microsystems, TRANSDUCERS '05; Vol. 2).