Improvements to a surface-wave antenna measurement range with troublesome site effects

A surface-wave antenna measurement range used for ship antenna modelling work has been improved by the development of a novel source antenna. The antenna, a large `half-truncated¿ corner reflector, has reduced unwanted range reflections to allow phase measurements to be made to an accuracy of approximately ±2°. Also, the screening effect of the reflector allows an adjacent range on the same reflecting ground plane to be operated simultaneously without noticeable effect on the surface-wave range performance.