Abstract

With the development of low-noise amplifiers, the noise contribution of the antenna has become a limiting factor on system performance in many applications. This paper discusses the calculation of the equivalent noise temperature contribution of parabolic reflector antennas using their radiation characteristics and environment. As an example, the equivalent noise temperature of an 85-foot reflector at 2 kMc is estimated as a function of orientation for two different primary illuminations. The relative contributions of the mainlobe, sidelobes and backlobes to the total antenna noise temperature is determined in each case to show the effect of antenna radiation characteristics on noise temperature. A functional relationship between the primary illumination of a parabolic reflector antenna and the system SNR is then derived from which the edge illumination producing the maximum SNR can be specified for a given family of primary illuminations.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.