Global Patent Index - EP 0322498 A3

EP 0322498 A3 19900523 - PRIMARY RADIATOR FOR PARABOLIC ANTENNA

Title (en)

PRIMARY RADIATOR FOR PARABOLIC ANTENNA

Publication

EP 0322498 A3 19900523 (EN)

Application

EP 88103388 A 19880304

Priority

JP 30475387 A 19871202

Abstract (en)

[origin: EP0322498A2] An illumination aperture (6) for receiving radio waves in a radio wave introducing member (2) is blocked by a covering member (17), and thus dust is prevented from coming into the illumination aperture externally by the covering member. The covering member is so thick as will coincide with the trough in a transmission loss curve of radio wave of the synthetic resin used as a forming material for the covering member. Accordingly, a mechanical strength of the covering member is high. Then, an expected attentuation of the radio wave going toward the illumination aperture through the covering member is very little.

IPC 1-7

H01Q 1/42; H01Q 19/08

IPC 8 full level

H01Q 1/42 (2006.01); H01Q 19/08 (2006.01)

CPC (source: EP)

H01Q 1/42 (2013.01); H01Q 19/08 (2013.01)

Citation (search report)

  • [Y] US 3114123 A 19631210 - CHRISTIAN KREUCHEN KARL HEINZ, et al
  • [A] DE 2060923 A1 19710729 - COMP GENERALE ELECTRICITE
  • [A] DE 2222952 A1 19731122 - SIEMENS AG
  • [Y] A.W. RUDGE et al.: "THE HANDBOCK OF ANTENNA DESIGN" vol. 2, 1983, Peter Peregrinus London, GB
  • [A] PATENT ABSTRACTS OF JAPAN vol. 1, no. 165 (E-77)(9383), 26 December 1977; & JP-A-52 113 142 (SHIN NIPPON SEITETSU K.K.) 22.09.1977
  • [A] ELECTRONICS LETTERS vol. 17, no. 21, October 1981, pages 777-779, London, GB; W.S. DAVIES et al.: "Bird-Proff Feed-Horn Windows for Microwave Radio System Antennas"

Designated contracting state (EPC)

DE FR GB SE

DOCDB simple family (publication)

EP 0322498 A2 19890705; EP 0322498 A3 19900523

DOCDB simple family (application)

EP 88103388 A 19880304