TY - CPAPER
KW - Tuning
KW - Thin films
KW - Electric fields
KW - Ferroelectric materials
KW - Barium compounds
KW - Barium strontium titanate
KW - Bandwidth
KW - Bandpass filters
KW - Insertion losses
KW - Microstrip lines
KW - Microwave filters
KW - Microstrip filters
KW - Microwave frequencies
AU - G Subramanyam
AU - F.W Van Keuls
AU - F.A Miranda
AU - C.L Canedy
AU - S Aggarwal
AU - T Venkatesan
AU - Ramamoorthy Ramesh
AB - The correlation of electric field and critical design parameters such as the insertion loss, frequency tunability, return loss, and bandwidth of conductor/ferroelectric/dielectric microstrip tunable K-band microwave filters is discussed in this work. This work is based primarily on barium strontium titanate (BSTO) ferroelectric thin film based tunable microstrip filters for room temperature applications. Two new parameters which we believe will simplify the evaluation of ferroelectric thin films for tunable microwave filters, are defined. The first of these, called the sensitivity parameter, is defined as the incremental change in center frequency with incremental change in maximum applied electric field (EPEAK) in the filter. The other, the loss parameter, is defined as the incremental or decremental change in insertion loss of the filter with incremental change in maximum applied electric field. At room temperature, the Au/BSTO/LAO microstrip filters exhibited a sensitivity parameter value between 15 and 5 MHz/cm/kV. The loss parameter varied for different bias configurations used for electrically tuning the filter. The loss parameter varied from 0.05 to 0.01 dB/cm/kV at room temperature.
BT - Integrated Ferroelectrics
DO - 10.1080/10584589908215597
LA - eng
M1 - 1
N1 - cited By 17
N2 - The correlation of electric field and critical design parameters such as the insertion loss, frequency tunability, return loss, and bandwidth of conductor/ferroelectric/dielectric microstrip tunable K-band microwave filters is discussed in this work. This work is based primarily on barium strontium titanate (BSTO) ferroelectric thin film based tunable microstrip filters for room temperature applications. Two new parameters which we believe will simplify the evaluation of ferroelectric thin films for tunable microwave filters, are defined. The first of these, called the sensitivity parameter, is defined as the incremental change in center frequency with incremental change in maximum applied electric field (EPEAK) in the filter. The other, the loss parameter, is defined as the incremental or decremental change in insertion loss of the filter with incremental change in maximum applied electric field. At room temperature, the Au/BSTO/LAO microstrip filters exhibited a sensitivity parameter value between 15 and 5 MHz/cm/kV. The loss parameter varied for different bias configurations used for electrically tuning the filter. The loss parameter varied from 0.05 to 0.01 dB/cm/kV at room temperature.
PB - Gordon & Breach Science Publ Inc, Newark
PY - 1999
SP - 273
EP - 285
T2 - Integrated Ferroelectrics
T3 - Integrated Ferroelectrics
TI - Correlation of electric field and critical design parameters for ferroelectric tunable microwave filters
VL - 24
SN - 10584587
ER -