Hybrid bulk acoustic wave structure for temperature stability in LTE applications

Jea Shik Shin, Insang Song, Chul Soo Kim, Sang Uk Son, Moon Chul Lee, Duck Hwan Kim, Ho Soo Park, Jing Cui, Yujie Ai, Sungwoo Hwang, Jae-Sung Rieh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A novel structure of hybrid bulk acoustic wave (BAW) resonator with low temperature coefficient of frequency (TCF) is presented. Implemented with a pair of quarter-wave reflectors on air-cavity reflector, the hybrid BAW resonator exhibits a TCF of as low as -11.5\ {\rm ppm}/^{\circ}{\rm C} and an effective electro-mechanical coupling coefficient ({\rm kt}^{2}) of 5.1% at the frequency of 2.5 GHz. The hybrid BAW resonator also shows excellent Q-factors of 1627 and 1842 at resonance and anti-resonance frequency, respectively. RF duplexer configured with the hybrid BAW resonators is provided as well. The fabricated RF duplexer for long term evolution (LTE) band-7, which should be designed to prevent the co-existence problem with WiFi having extremely narrow fractional band-gap of 0.7%, achieves an attenuation of 36.8 dB and an insertion loss of 2.4 dB.

Original languageEnglish
Article number6568974
Pages (from-to)453-455
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume23
Issue number9
DOIs
Publication statusPublished - 2013 Jul 31

Fingerprint

Long Term Evolution (LTE)
Resonators
Acoustic waves
resonators
acoustics
reflectors
Temperature
Electromechanical coupling
temperature
Insertion losses
coefficients
coupling coefficients
Energy gap
insertion loss
narrowband
Q factors
attenuation
Air
cavities
air

Keywords

  • Bulk acoustic wave (BAW) resonator
  • RF duplexer
  • RF filter
  • temperature coefficient of frequency (TCF)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Hybrid bulk acoustic wave structure for temperature stability in LTE applications. / Shin, Jea Shik; Song, Insang; Kim, Chul Soo; Son, Sang Uk; Lee, Moon Chul; Kim, Duck Hwan; Park, Ho Soo; Cui, Jing; Ai, Yujie; Hwang, Sungwoo; Rieh, Jae-Sung.

In: IEEE Microwave and Wireless Components Letters, Vol. 23, No. 9, 6568974, 31.07.2013, p. 453-455.

Research output: Contribution to journalArticle

Shin, JS, Song, I, Kim, CS, Son, SU, Lee, MC, Kim, DH, Park, HS, Cui, J, Ai, Y, Hwang, S & Rieh, J-S 2013, 'Hybrid bulk acoustic wave structure for temperature stability in LTE applications', IEEE Microwave and Wireless Components Letters, vol. 23, no. 9, 6568974, pp. 453-455. https://doi.org/10.1109/LMWC.2013.2272609
Shin, Jea Shik ; Song, Insang ; Kim, Chul Soo ; Son, Sang Uk ; Lee, Moon Chul ; Kim, Duck Hwan ; Park, Ho Soo ; Cui, Jing ; Ai, Yujie ; Hwang, Sungwoo ; Rieh, Jae-Sung. / Hybrid bulk acoustic wave structure for temperature stability in LTE applications. In: IEEE Microwave and Wireless Components Letters. 2013 ; Vol. 23, No. 9. pp. 453-455.
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