EP 0140598 B1 19890301 - HORN-REFLECTOR MICROWAVE ANTENNAS WITH ABSORBER LINED CONICAL FEED
Title (en)
HORN-REFLECTOR MICROWAVE ANTENNAS WITH ABSORBER LINED CONICAL FEED
Publication
Application
Priority
US 54239683 A 19831017
Abstract (en)
[origin: EP0140598A1] A horn-reflector antenna comprising the combination of a paraboloidal reflector (11) forming a paraboloidal reflecting surface for transmitting and receiving microwave energy; a conical feed horn (10) for guiding microwave energy from the focus of the paraboloidal reflecting surface to the reflector (11); and a lower end portion (10a) of the inside surface of the conical horn (10) being formed by a smooth metal wall, the balance of the inside surface of the conical horn being formed by a layer of absorber material (30) on at least the opposed side walls of said conical horn (10) that effect the E-plane radiation pattern envelope (RPE) of a horizontally polarized signal, the surfaces of the metal wall (10a) and the absorber material (30) defining a single continuous conical surface, and the absorber material (30) increasing the Eigen value E and the spherical hybridicity factor (Rs) sufficiently to cause the E-plane and H-plane RPE's to approach each other. The exposed surface or the absorber material (30) inside said conical feed horn is preferably substantially flat.
IPC 1-7
IPC 8 full level
H01Q 17/00 (2006.01); H01Q 19/13 (2006.01)
CPC (source: EP)
H01Q 17/001 (2013.01); H01Q 19/132 (2013.01)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0140598 A1 19850508; EP 0140598 B1 19890301; BR 8405210 A 19850827; CA 1223345 A 19870623; DE 3476950 D1 19890406; JP H0626285 B2 19940406; JP S60103804 A 19850608
DOCDB simple family (application)
EP 84306759 A 19841004; BR 8405210 A 19841016; CA 465538 A 19841016; DE 3476950 T 19841004; JP 21721284 A 19841016