A 94 GHz Transmissometer
Abstract
The physical implementation of a 94 Ghz reflection transmissometer is documented. The instrument operates by reflecting a signal from a calibrated target but differs from a radar in that no range gate is used. The design is discussed and signals in the receiver are analyzed in order to document the operation and to ease troubleshooting. Test results are given both for calibration with an internal signal loop provided for that purpose and for outdoor tests with corner reflectors. The test results show that the transmissometer functions properly, although at a somewhat reduced range due to less return from the target than was predicted. The range is also limited by clutter which dominates the signal return at long ranges. The use of a modulated target is suggested to alleviate this problem, and a preliminary modulated target design is discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1990
- Accession Number
- ADA223309
Entities
People
- Thomas J. Barnum
Organizations
- University of Dayton