Abstract: An antenna feed network includes a septum polarizer including a waveguide defining a cavity, wherein a septum is disposed in the cavity to divide the cavity to form a first port and as second port, a diplexer in signal communication with at least one of the first port and the second port of the septum polarizer to route a signal based upon a frequency, and a wave coupler/splitter in signal communication with the diplexer to send and receive signals therebetween, the wave coupler/splitter including a first signal path and a second signal path, wherein the wave coupler/splitter controls a phase shift of a signal transmitted through at least one of the first signal path and the second signal path.

Abstract: An antenna system comprises an antenna element, a base plate, and a ground plane. The antenna element is configured to radiate signals, receive signals, or radiate and receive signals. The base plate has a front surface facing the antenna element and a rear surface facing away from the antenna element. The front surface of the base plate has an uncovered area, and the uncovered area of the base plate has no exposed conductive mechanical joints. The ground plane has a front surface facing the antenna element and a rear surface facing away from the antenna element. The antenna system further comprises a capacitive coupling between the base plate and the ground plane formed by an overlap region between the base plate and ground plane. The ground plane is capacitively coupled to the base plate in the overlap region.

Abstract: An E-field generator for r.f. susceptibility testing comprises first and second conductive arms, each comprising a conductor having a U-shaped portion. A driving circuit connected to first ends of each conductor delivers r.f. power to the arms. A load resistance is connected between the opposite ends of the conductors. The U-shaped portions of the elements are disposed opposite each other in spaced relationship so that a device to be tested can be positioned between them. The elements are mounted on a housing which encloses the load resistance as well as a 9:1 balun. The elements are removably secured in clamps, and the housing has provisions for mounting in alternative positions.

Abstract: In a radial power combiner/divider in which radial slots are provided for suppression of undesired modes, certain undesired modes which are not adequately suppressed by the radial slots are allowed to be propagated in a central coaxial transmission line and suppressed therein by means of longitudinal slots in the outer conductor. In an alternative embodiment, the central transmission line of the combiner/divider is in the form of a circular waveguide, and the suppression means comprises thin, spaced coaxial cylinders of dissipative material.