BROADBAND ELECTROMAGNETIC FIELD SIMULATOR

A broadband electromagnetic field simulator having an open horn TEM (transverse electromagnetic) waveguide coupled to launch energy in a strip line formed between a forwardly extending plate section and a ground plane. The test volume is located outside the horn between the forwardly extending plate section and the ground plane. The plate section which functions as a radiating element initially extends parallel to the ground plane and then curves downwardly to terminate adjacent it. In an alternative embodiment the plate section extends upwardly, initially with an exponential configuration and then forwardly to terminate at a vertical, grounded wall faced with anechoic material. The horn contains a flat conductor plate positioned parallel to and spaced from the top edge defining an asymmetrical transmission line within the horn. This plate conductor is coupled to the forwardly extending plate section either directly or by means of a series RLC coupling network.