title: Horn antenna with low sidelobe response for observations of diffuse celestial radiation.
abstract: 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 microm was measured to be <10(-9) at an angle of 70 degrees from the optical axis. Calculations are reported which illustrate the contributions of diffraction and scattering to the sidelobe response.
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: S
authors.initials: S
authors.lastname: Hayakawa
authors.forename: A E
authors.initials: AE
authors.lastname: Lange
authors.forename: T
authors.initials: T
authors.lastname: Matsumoto
authors.forename: H
authors.initials: H
authors.lastname: Matsuo
authors.forename: H
authors.initials: H
authors.lastname: Murakami
authors.forename: P L
authors.initials: PL
authors.lastname: Richards