S-band SBAW microwave source, phase II
Type
Label
S-band SBAW microwave source, phase II
Language
eng
Abstract
The primary purpose of the program was to establish techniques necessary to fabricate a high performance S-band microwave signal source using state-of-the-art SBAW oscillator technology. The objectives of Phase II were: aging study of 1.072 GHz SBAW delay line oscillators; development of 2.143 GHz SBAW delay lines; construction and characterization of 2.143 GHz SBAW oscillators; assessment of the compatibility and performance improvement of SBAW devices in oscillator circuits presently using SAW devices; and, demonstration of a cost-effective method to produce SBAW delay line from the same mask, but operating at different frequencies. Two design approaches were implemented. The third harmonic transducer on 36 deg rotated Y-cut quartz proved to be the most useful design, whereas the fifth harmonic transducer on -50.5 deg rotated Y-cut quartz suffered from high insertion loss and poor sidelobe rejection. The construction and characterization of the 2 GHz SBAW oscillator are described. Phase noise, frequency dependence on temperature, and 6-month aging were measured. Some SAW and SBAW oscillators were compared as were both the 1 and 2 GHz oscillators. The 2 GHz SBAW oscillator showed significant improvement in phase noise and temperature stability over the 2 GHz SAW oscillator developed in previous NASA programs. A technique to produce SBAW delay lines of different frequencies from a single mask is examined. The delay lines were incorporated into oscillator circuits to demonstrate the ability to select the frequency output of the SBAW oscillator
resource.governmentPublication
federal national government publication
Illustrations
illustrations
Index
no index present
Literary Form
non fiction
Main title
S-band SBAW microwave source, phase II
Nature of contents
technical reports
Series statement
NASA-CR, 175153
resource.variantTitle
S-band shallow bulk acoustic wave microwave source