Accession Number : ADP006128

Title :   Observed Phase Delay through Rain at 96 GHz,

Corporate Author : NATIONAL TELECOMMUNICATIONS AND INFORMATION ADMINISTRATION BOULDER CO INST FO R TELECOMMUNICATION SCIENCES

Personal Author(s) : Allen, Kenneth C.

Report Date : MAY 1987

Pagination or Media Count : 11

Abstract : This paper presents observations of phase delay through rain at 96 GHz. The results are pertinent for target identification when relative amplitude and phase information are used from circularly polarized radar returns. At the transmitter site, a 9.6 GHz source was vertically polarized and a 96.1 GHz source was right-hand circularly polarized. A single local oscillator phased locked both sources. At the receiver site, 1050 m away, the local oscillator was phase locked to the received 9.6 GHz signal. Both left- and right-hand circular polarizations at 96.1 GHz were received using separate antennas. The phase of each polarizations at 96.1 GHz were received using separate antennas. The phase of each polarization at 96.1 GHz were received using separate antennas. The phase of each polarization at 96.1 GHz was measured relative to the 9.6-GHz reference. This allowed the examination of the behavior of the differential phase delay of the circular polarizations. (Author)

Descriptors :   *ELECTROMAGNETIC WAVE PROPAGATION, *RAIN, *RADAR REFLECTIONS, *PHASE SHIFT, EXTREMELY HIGH FREQUENCY, MILLIMETER WAVES, POLARIZATION, RADAR SIGNALS, SIGNAL PROCESSING, PHASE LOCKED SYSTEMS, LOCAL OSCILLATORS, SYMPOSIA.

Subject Categories : Radiofrequency Wave Propagation
      Meteorology
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE