HIGH GAIN ANTENNA TECHNIQUES. SYSTEM GAIN-TO-NOISE TEMPERATURE RATIO MEASUREMENTS ON AN ADAPTIVELY PHASED ARRAY
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS ANTENNA LAB
Pagination or Media Count:
Factors affecting the ultimate sensitivity of a typical microwave receiving system are discussed. It is shown that the receiver noise-temperature and the antenna gain-to-noise-temperature ratio are the dominant parameters in determining system capabilities. Data is presented, along with the technique used to obtain the data, for the receiver noise temperature, the antenna gain, and the antenna noise temperature for each element of the array. An expression is developed for the gain-to-noise-temperature ratio of the array and is shown to be equivalent to an enhancement factor operating on the individual element gain-to-noise-temperature ratio. The effects of system parameter variations are studied and typical values of enhancement factor are calculated. It is concluded that for minor variations in parameters the enhancement factor is affected very little.
- Electrical and Electronic Equipment
- Radio Communications