Document Type and Number:
Japanese Patent JPS5542761
Kind Code:
B2
Abstract:
1515787 Aerials RAYTHEON CO 7 April 1976 [1 May 1975] 14144/74 Heading H4A An antenna assembly for producing a plurality of directional beams of electromagnetic energy and having constant beam width over a frequency range, comprises a printed circuit lens 10 having a plurality of feedports 20 disposed along a focal arc and contiguous with an irregularly shaped microwave lens 24, in microstrip form on a printed circuit sandwiched between and insulated from, copper ground planes 34. The lens 24 is in turn connected to a greater number of stripline feeds 26 along respective transmission lines to respective aerial elements 28. A radio frequency absorbing material, providing frequency dependent attenuation, is disposed at 36 1 , 36 2 across the transmission lines 26 such that the amount of material effective in a transmission line varies in a progressive manner from transmission line to transmission line.
Application Number:
JP4981676A
Publication Date:
November 01, 1980
Filing Date:
April 30, 1976
Export Citation:
International Classes:
H01Q3/32; H01Q17/00; H01Q19/06; H01Q21/00