Abstract
The paper presents a design method for an offset shaped dual-reflector antenna (OSDRA) with an elliptical aperture of low cross-polarisation characteristics. This method is a dual-reflector synthesis based on a reflector shaping method using reflector shaping functions and is applied to attain low cross-polarisation characteristics for the OSDRA. The initial values for the reflector shaping are explicitly determined by a reflector system configuration transformation technique. This design method has been verified through measurement of an elliptical aperture antenna for a satellite news gathering system and a very small aperture terminal in the Ku band.
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