Atmospheric Probing by Active Millimeter Wave System.
Abstract
The objectives of the contract are to design, assemble, and test a W-band Doppler radar operating at a frequency of 94 GHZ (lambda = 3.3 mm). The ultimate goal of the project is to use the radar in a cloud physics research program. The radar design is based on an MTI scheme in which the transmitter RF pulse produced by an Extended Interaction Oscillator phase-locks a Coho IF signal. A gunn diode oscillator phase-locked on a crystal oscillator signal provides the STALO input to the mixers. The radar is equipped with two separate transmitter and receiver antenna having a 3-foot diameter. The receiver mixer noise figure is 6.5 dB DSB and the transmitter power s 1.2 kW. Pulse width can be adjusted between 0.1 to 2 microns, and Pulse Repetition Rate between 2.5 to 20 KHZ. The radar is completed and tested. Test results indicate that the Doppler operation is satisfactory and that the minimum range at which the radar can operate is approximately 60 m (400 ns), as primarily limited by the IF amplifier recovertie. The Doppler radar is equipped with an on-line signal processor for real-time evaluation of mean Doppler frequency and mean signal intensity. Keywords include: Millimeter Wave Radar, Doppler Radar, and Cloud Physics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1985
- Accession Number
- ADA153550
Entities
People
- R. Lhermitte
Organizations
- Rosenstiel School of Marine, Atmospheric, and Earth Science