TY - GEN
T1 - Wide piezoelectric tuning of LTCC bandpass filters
AU - Al-Ahmad, Mahmoud
AU - Maenner, Ruth
AU - Matz, Richard
AU - Russer, Peter
PY - 2005
Y1 - 2005
N2 - The increasing number of frequency bands and services in wireless communications is causing a demand for analogue active and passive frontend components with wide bandwidth or tuning range, respectively. Similar to microelectromechanical systems (MEMS), this work presents a parallel plate capacitor with multilayer dielectrics and piezoelectrically movable top electrode as an advantageous tunable element with no addition of any lossy material. When applied as a shunt capacitor in a coupled microstrip-line LTCC bandpass filter, the center frequency of the filter is tuned from 1.1 GHz to 2. 6 GHz with 200 V control voltage and low insertion loss of 2 to 4 dB. The analysis of the device by full-wave simulation reveals a potential tuning range from 0.8 GHz to 2.8 GHz when the thin-film processability of the LTCC surface is properly controlled.
AB - The increasing number of frequency bands and services in wireless communications is causing a demand for analogue active and passive frontend components with wide bandwidth or tuning range, respectively. Similar to microelectromechanical systems (MEMS), this work presents a parallel plate capacitor with multilayer dielectrics and piezoelectrically movable top electrode as an advantageous tunable element with no addition of any lossy material. When applied as a shunt capacitor in a coupled microstrip-line LTCC bandpass filter, the center frequency of the filter is tuned from 1.1 GHz to 2. 6 GHz with 200 V control voltage and low insertion loss of 2 to 4 dB. The analysis of the device by full-wave simulation reveals a potential tuning range from 0.8 GHz to 2.8 GHz when the thin-film processability of the LTCC surface is properly controlled.
KW - Bonding
KW - Ceramics
KW - Piezoelectric materials
KW - Tunable filter
KW - Varactors
UR - http://www.scopus.com/inward/record.url?scp=33749249044&partnerID=8YFLogxK
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U2 - 10.1109/MWSYM.2005.1516910
DO - 10.1109/MWSYM.2005.1516910
M3 - Conference contribution
AN - SCOPUS:33749249044
SN - 0780388461
SN - 9780780388468
T3 - IEEE MTT-S International Microwave Symposium Digest
SP - 1275
EP - 1278
BT - 2005 IEEE MTT-S International Microwave Symposium Digest
T2 - 2005 IEEE MTT-S International Microwave Symposium
Y2 - 12 June 2005 through 17 June 2005
ER -