Implementing antenna squint compensation for a consumer satellite terminal
Ka-band two-way broadband satellite networks for the consumer market typically use circular polarization, because this removes the need for physical polarization alignment of the user terminal. However, the circular polarization, combined with the offset parabolic reflector configuration, results in an imperfect beam alignment of transmit versus receive, ie beam squint, and hence yields a penalty on the link budget, therefore on the space segment cost. In order to avoid this, the feed assembly was modified to intentionally generate waveguide over-modes such that the squint is counteracted. This talk will discuss the challenges encountered both technical and patent IP related.