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SAW Correlator Temperature Compensation Using a Pulse Width Modulated Temperature Controller

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Date Issued:
2019
Abstract/Description:
A Surface Acoustic Wave (SAW) correlator built on a Lithium Niobate substrate is temperature compensated in order to maintain a constant center frequency. Frequency shifts as a result of temperature variations limit device performance. An Arduino(&)#174;-based PWM temperature controller is developed to read the device temperature from a resistance temperature detector located on the SAW wafer and to regulate its temperature to a specified setpoint by providing current to a heater which is co-located with the temperature sensor on the SAW correlator substrate. The final temperature controller achieves frequency shifts of 0.013 MHz from room temperature with a worst-case PPM experienced over 30(&)deg;C of temperature variation of 0.48 PPM/(&)deg;C. Linear and non-linear plant models are developed successfully to predict the device's temperature based on any input setpoint. Although there are alternatives to limit temperature drift at different temperatures, this thesis presents a simple method that works on a standard Lithium Niobate substrate.
Title: SAW Correlator Temperature Compensation Using a Pulse Width Modulated Temperature Controller.
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Name(s): Betancourt, Daniel, Author
Weeks, Arthur, Committee Chair
Malocha, Donald, Committee Member
Richie, Samuel, Committee Member
Gong, Xun, Committee Member
University of Central Florida, Degree Grantor
Type of Resource: text
Date Issued: 2019
Publisher: University of Central Florida
Language(s): English
Abstract/Description: A Surface Acoustic Wave (SAW) correlator built on a Lithium Niobate substrate is temperature compensated in order to maintain a constant center frequency. Frequency shifts as a result of temperature variations limit device performance. An Arduino(&)#174;-based PWM temperature controller is developed to read the device temperature from a resistance temperature detector located on the SAW wafer and to regulate its temperature to a specified setpoint by providing current to a heater which is co-located with the temperature sensor on the SAW correlator substrate. The final temperature controller achieves frequency shifts of 0.013 MHz from room temperature with a worst-case PPM experienced over 30(&)deg;C of temperature variation of 0.48 PPM/(&)deg;C. Linear and non-linear plant models are developed successfully to predict the device's temperature based on any input setpoint. Although there are alternatives to limit temperature drift at different temperatures, this thesis presents a simple method that works on a standard Lithium Niobate substrate.
Identifier: CFE0007787 (IID), ucf:52331 (fedora)
Note(s): 2019-12-01
M.S.E.E.
Engineering and Computer Science,
Masters
This record was generated from author submitted information.
Subject(s): SAW -- Temperature Controller -- PID
Persistent Link to This Record: http://purl.flvc.org/ucf/fd/CFE0007787
Restrictions on Access: public 2019-12-15
Host Institution: UCF

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