Patent ID: 8674893
Filing Date: 2014-03-18
Classification: H01Q

Abstract:
1. An antenna feed assembly including: at least two feed chains each having a longitudinal feed axis, the feed chains being disposed adjacent one another in a lateral direction, each feed chain being adapted to transmit or receive electromagnetic radiation between itself and a reflector of an antenna along the longitudinal feed axis thereof via a transmit/receive element, the feed chains being held in fixed relationship to one another by axially spaced first and second mountings, the feed chains extending axially from the second mounting past the first mounting towards the reflector with the transmit/receive elements being positioned between the first mounting and the reflector, the first mounting having a lower coefficient of thermal expansion in the lateral direction than the second mounting, whereby the difference in an amount of thermal expansion between the first mounting and second mounting reduces a translational movement of each transmit/receive element in the lateral direction caused by temperature change of the antenna feed assembly.