Measurements and modeling of temperature compensated surface acoustic wave resonators

Mohamad Ashari, Zainab and Sidek, Fatini and Nordin, Anis Nurashikin (2010) Measurements and modeling of temperature compensated surface acoustic wave resonators. In: 2010 Asia-Pacific Conference on Applied Electromagnetics (APACE 2010), 9-11 Nov 2010, Port Dickson, Negeri Sembilan.

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Abstract

Surface Acoustic Wave (SAW) resonators are key components in oscillators, frequency synthesizers and transceivers. One of the drawbacks of SAW resonators are that its piezoelectric substrates are highly sensitive to ambient temperature resulting in performance degradation. This work proposes a simple feedback control circuit which stabilizes the temperature of the SAW resonator, making it independent of temperature change. The circuit is based on the oven-control method which elevates the temperature of a resonator to a high temperature, making it tolerant to minor changes in the ambient temperature. This circuit consists of a temperature sensor, heaters and a comparator which turns the heater on and off depending on the ambient temperature. Several SAW resonators were tested using the designed circuit. Experimental results indicate that the temperature coefficient of frequency (TCF) decreased significantly from 130.44/ #x00B0;C to -1.11/ #x00B0;C when the circuit was utilized. An equivalent RLC circuit model of both the uncompensated and compensated SAW resonators are also presented.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	3239/3705
Uncontrolled Keywords:	comparator;equivalent RLC circuit model;heaters;oven-control method;simple feedback control circuit;temperature compensated surface acoustic wave resonators;temperature sensor;uncompensated SAW resonators;RLC circuits;circuit feedback;equivalent circuits;surface acoustic wave resonators;
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices > TK7885 Computer engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Dr. Anis Nurashikin Nordin
Date Deposited:	22 Sep 2011 10:09
Last Modified:	22 Sep 2011 10:09
URI:	http://irep.iium.edu.my/id/eprint/3705

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