TFBAR filters for 2 GHz wireless applications

K. W. Kim, Jong Gwan Yook, M. G. Gu, W. Y. Song, Young Joong Yoon

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Thin film bulk acoustic resonators (TFBAR) using AlN with two electrodes have been used in the design of band pass filters at 2 GHz frequency bands. Both membrane and air-gap are used to suppress the over-mode phenomenon. Resonator modeling was performed based on measured frequency response of a single resonator with modified Butterworth-Van Dyke (MBVD) model. Electric coupling coefficient, k, is 0.2075 (4.3%) and Q is 577.18 for a single TFBAR. Additional TFBAR is used to improve out of band rejection in the conventional ladder topology and each contributes -3 dB suppression improvement at stop-band. Four different types of ladder filters were fabricated and modelled and revealed only -2 to -3 dB insertion loss for all the cases with bandwidth of around 52 MHz.

Original languageEnglish
Pages (from-to)1181-1184
Number of pages4
JournalIEEE MTT-S International Microwave Symposium Digest
Volume2
DOIs
Publication statusPublished - 2002 Jan 1

Fingerprint

Acoustic resonators
resonators
filters
Thin films
acoustics
Resonators
thin films
Ladder networks
ladders
Ladders
Insertion losses
Bandpass filters
Frequency bands
Frequency response
Topology
Membranes
Bandwidth
coupling coefficients
Electrodes
bandpass filters

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

@article{e33f5b032850447e9b974a8e6de313df,
title = "TFBAR filters for 2 GHz wireless applications",
abstract = "Thin film bulk acoustic resonators (TFBAR) using AlN with two electrodes have been used in the design of band pass filters at 2 GHz frequency bands. Both membrane and air-gap are used to suppress the over-mode phenomenon. Resonator modeling was performed based on measured frequency response of a single resonator with modified Butterworth-Van Dyke (MBVD) model. Electric coupling coefficient, k, is 0.2075 (4.3{\%}) and Q is 577.18 for a single TFBAR. Additional TFBAR is used to improve out of band rejection in the conventional ladder topology and each contributes -3 dB suppression improvement at stop-band. Four different types of ladder filters were fabricated and modelled and revealed only -2 to -3 dB insertion loss for all the cases with bandwidth of around 52 MHz.",
author = "Kim, {K. W.} and Yook, {Jong Gwan} and Gu, {M. G.} and Song, {W. Y.} and Yoon, {Young Joong}",
year = "2002",
month = "1",
day = "1",
doi = "10.1109/MWSYM.2002.1011861",
language = "English",
volume = "2",
pages = "1181--1184",
journal = "IEEE MTT-S International Microwave Symposium Digest",
issn = "0149-645X",
publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

TFBAR filters for 2 GHz wireless applications. / Kim, K. W.; Yook, Jong Gwan; Gu, M. G.; Song, W. Y.; Yoon, Young Joong.

In: IEEE MTT-S International Microwave Symposium Digest, Vol. 2, 01.01.2002, p. 1181-1184.

Research output: Contribution to journalArticle

TY - JOUR

T1 - TFBAR filters for 2 GHz wireless applications

AU - Kim, K. W.

AU - Yook, Jong Gwan

AU - Gu, M. G.

AU - Song, W. Y.

AU - Yoon, Young Joong

PY - 2002/1/1

Y1 - 2002/1/1

N2 - Thin film bulk acoustic resonators (TFBAR) using AlN with two electrodes have been used in the design of band pass filters at 2 GHz frequency bands. Both membrane and air-gap are used to suppress the over-mode phenomenon. Resonator modeling was performed based on measured frequency response of a single resonator with modified Butterworth-Van Dyke (MBVD) model. Electric coupling coefficient, k, is 0.2075 (4.3%) and Q is 577.18 for a single TFBAR. Additional TFBAR is used to improve out of band rejection in the conventional ladder topology and each contributes -3 dB suppression improvement at stop-band. Four different types of ladder filters were fabricated and modelled and revealed only -2 to -3 dB insertion loss for all the cases with bandwidth of around 52 MHz.

AB - Thin film bulk acoustic resonators (TFBAR) using AlN with two electrodes have been used in the design of band pass filters at 2 GHz frequency bands. Both membrane and air-gap are used to suppress the over-mode phenomenon. Resonator modeling was performed based on measured frequency response of a single resonator with modified Butterworth-Van Dyke (MBVD) model. Electric coupling coefficient, k, is 0.2075 (4.3%) and Q is 577.18 for a single TFBAR. Additional TFBAR is used to improve out of band rejection in the conventional ladder topology and each contributes -3 dB suppression improvement at stop-band. Four different types of ladder filters were fabricated and modelled and revealed only -2 to -3 dB insertion loss for all the cases with bandwidth of around 52 MHz.

UR - http://www.scopus.com/inward/record.url?scp=0036066116&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036066116&partnerID=8YFLogxK

U2 - 10.1109/MWSYM.2002.1011861

DO - 10.1109/MWSYM.2002.1011861

M3 - Article

AN - SCOPUS:0036066116

VL - 2

SP - 1181

EP - 1184

JO - IEEE MTT-S International Microwave Symposium Digest

JF - IEEE MTT-S International Microwave Symposium Digest

SN - 0149-645X

ER -