SECTORAL PATTERN SYNTHESIS WITH PRIMARY FEEDS

This paper presents investigations carried out at CNET in order to des ign a primary feed radiating a sectoral pattern (+/-70-degrees). A rou gh synthesis method based on the equivalent radiating aperture of the feed is first used. Then we rigorously study the electromagnetic perfo rmances of many related structures with a highly accurate analysis sof tware based on the integral equation formulation. Lastly, we select th e final design for the feed horn and present two breadboards and the a ssociated measurements (normalized impedance and far field patterns) w hich show excellent agreement with simulation.