THE CRYSTAL-VIDEO RADIOMETER,
Abstract
A theoretical analysis iis made of a microwave radiometer which utilizes no predetection amplification. The minimum detectable temperature, defined as the temperature which results in an output signal-to-noise ratio of unity, is shown to be (pi/BM)(Tsub 0/2K tau sub 0) to the onehalf power, where B is the predetection bandwidth, M is the crystal figure of merit, sub 0 is ambient temperature, K is Boltzmann's constant, and Tau sub 0 is the postdetection time constant. The predicted minimum detectable temperature for the millimeter wavelength region is about 50 K for a one-second postdetection time constant. Some experimental measurements are presented which show good agreement with the theoretical results. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 08, 1962
- Accession Number
- AD0438232
Entities
People
- Jack Copeland
Organizations
- United States Army Aviation and Missile Command