The effect of quasi-optics errors on reflector antenna performance

• Published in: IEEE transactions on microwave theory and techniques Vol. 40; no. 6; pp. 1318 - 1322
• Main Authors: Foster, P.R., Wylde, R.J.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.06.1992; Institute of Electrical and Electronics Engineers
• Subjects: Antenna feeds; Applied sciences; Atmosphere; Bandwidth; Control systems; Degradation; Earth; Error correction; Exact sciences and technology; Frequency; Reflector antennas; Remote sensing; Services and terminals of telecommunications; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Telemetry. Remote supervision. Telewarning. Remote control; Reflector antenna; Wide band; Gaussian field; Radiation source; Far field; Radiation pattern; Error correction; Optimization; Remote sensing
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/22.141366

The use of quasi-optics feed systems with a reflector antenna allows multiple-frequency operation over a very wide bandwidth for remote sensing of the Earth and atmosphere from space. The errors in such a multichannel quasi-optical feed system must be controlled in order to limit the degradation of system performance. These errors can be attributed to the presence of higher-order Gaussian modes, but the errors can be minimized if the quasi-optical system can be made independent of frequency. If volume limitations preclude a frequency-independent design, the amplitude of the higher-order Gaussian modes must be controlled.< >