EFFECTIVE AREA OF SATELLITE-BORNE ANTENNAS FOR RADIO ASTRONOMY
HARVARD COLL CAMBRIDGE MA MUSEUM OF COMPARATIVE ZOOLOGY
Pagination or Media Count:
The use of satellite antennas for precision measurements of polarized or unpolarized radiation in space requires a consistent quantitative antenna theory. For most practical antenna applications, only a rough qualitative knowledge is required. However, when the radio astronomer is concerned with interpreting the numerical values of antenna measurements, a thorough understanding of the operation of theANTENNA IS REQUIRED. Some elementary problems in the use of satellite antennas are presented. These problems are covered under the general topic of determining the effective area of a receiving antenna. In more elementary terms, the radiation impinging on the antenna must be related to measurements at the antenna terminals. For example, the relation between the power density in a randomly polarized field near the antenna and the power dissipated in a load resistor connected to the antenna terminals must be established.