Transmission/reception sources of electromagnetic waves for multireflector antenna

摘要

The present invention relates to an electromagnetic wave transmission/reception source for a multireflector antenna of the Cassegrain type comprising longitudinal-radiation means (12) operating in a first frequency band and an array of n radiating elements (11) of the travelling-wave type operating in a second frequency band with the n radiating elements arranged symmetrically around the longitudinal-radiation means, the array and the longitudinal-radiation means having an approximately common phase centre, the array of n radiating elements being excited by a waveguide (15) of polygonal cross section. The invention applies especially in satellite communication systems operating in the C-, Ku- or Ka-bands.