Horn antenna with low sidelobe response for observations of diffuse celestial radiation

Details Horn antenna with low sidelobe response for observations of diffuse celestial radiation Horn antenna with low sidelobe response for observations of diffuse celestial radiation

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apopt..26..410s&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 26, Jan. 15, 1987, p. 410-415. Research supported by the U.S.-Japan Cooperative Science Pr

Physics

Optics

5

Antenna Design, Horn Antennas, Microwave Antennas, Rocket-Borne Instruments, Sky Brightness, Submillimeter Waves, Diffuse Radiation, Microwave Radiometers, Sidelobe Reduction, Sky Radiation

Scientific paper

A horn antenna with low sidelobe response has been fabricated for a rocket-borne observation of the diffuse brightness of the sky at submillimeter wavelengths. The antenna consists of a Winston concentrator which defines the field of view and a flared baffle which minimizes diffraction. The sidelobe response for lambda = 337 microns was measured to be less than 10 to the -9th at an angle of 70 deg from the optical axis. Calculations are reported which illustrate the contributions of diffraction and scattering to the sidelobe response.

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