Title :
Ferroelectric thin film based tunable devices for software defined radio application
Author :
Rao, G. Lakshmi Narayana ; Saravanan, K. Venkata ; Raju, K.C.James
Author_Institution :
Sch. of Phys., Univ. of Hyderabad, Hyderabad
Abstract :
In this paper, we present a model of ferroelectric thin film based tunable device on silicon substrate for software defined radio (SDR) application. This model utilizes an interdigitated capacitor (IDC) structure and is showing high tunability besides being small in size. The IDC used in the filter is designed using Agilent ADS software and is simulated using planar and fullwave electromagnetic simulators. The modeling of the IDC on multilayer substrate is also discussed in this paper. An IDC structure as per this model is realized and characterized. Capacitances of 1 pF to 3.5 pF are obtained for 0.35 mum thick ferroelectric thin films on 500 mum silicon substrates over the frequency range of 1-4 GHz from realized IDC and 2 pF to 8 pF from the 3D electromagnetic simulation. Using the IDC structure realized, a tunable filter is designed, simulated and the results are discussed.
Keywords :
ferroelectric capacitors; ferroelectric thin films; filters; silicon; software radio; agilent ADS software; capacitance 1 pF to 3.5 pF; capacitance 2 pF to 8 pF; ferroelectric thin film; frequency 1 GHz to 4 GHz; interdigitated capacitor structure; silicon substrate; size 0.35 mum; size 500 mum; software defined radio; tunable device; Application software; Capacitors; Ferroelectric materials; Filters; Nonhomogeneous media; Semiconductor thin films; Silicon; Software radio; Substrates; Thin film devices; Ferroelectric thin film; interdigitated capacitor; software defined radio; tunable filter;
Conference_Titel :
TENCON 2008 - 2008 IEEE Region 10 Conference
Conference_Location :
Hyderabad
Print_ISBN :
978-1-4244-2408-5
Electronic_ISBN :
978-1-4244-2409-2
DOI :
10.1109/TENCON.2008.4766618
