Abstract: An electrically-conductive flexible probe is mounted within a wave guide that receives radio-frequency electromagnetic radiation. A leading portion of the probe has an orientation that is adjustable between two positions that are angularly displaced with respect to each other by 90.degree.. A permanent bar magnet is connected to the leading portion of probe, and an electromagnet is mounted adjacent to the bar magnet so as to be capable of being magnetically coupled to the bar magnet.

Abstract: A high-frequency signal receiver has two separate probes arranged within a waveguide for receiving both modes of an orthogonally polarized signal. A first probe protrudes directly into a rectangular cavity located at the receiving end of a circular waveguide and a second probe is specially shaped to employ the walls of the rectangular cavity and the circular waveguide as a ground plane, thereby to form a transmission line connected to a receiver probe portion arranged in the circular waveguide that receives the other of the orthogonal polarization not received by the first probe but which is reflected outwardly by the rectangular cavity.

Abstract: An optimized feedhorn comprising a circular waveguide having a corrugated plate disposed around the outside of the aperture of the waveguide wherein the corrugations of the plate are capacitive as to E plane signals. The feedhorn includes a reduced aperture diameter which selectively protrudes beyond the plane of the corrugated plate. The amount of protrusion of the aperture is determined to approximately equalize E and H plane beamwidths and selectively shape the top and skirts of the signal pattern around the center frequency of interest.

Abstract: A rotatable polarized signal receiver, having a rectangular waveguide orthogonally coupled to a circular waveguide, has a receiver probe portion oriented in the circular waveguide and a signal launch probe portion extending into the rectangular waveguide. A dielectric insert located in the circular waveguide transforms circularly polarized signals to linearly polarized signals. Since the receiver probe portion can be rotated right circular or left circular polarization can be selected and received.

Abstract: A rotatable polarized signal receiver in a system for receiving linearly polarized electromagnetic signals includes a signal conductor having a receiver probe portion, oriented in a circular waveguide parallel to the polarization of the incident signal, and signal launch probe portion extending into the rectangular waveguide orthogonal to the direction of signal transmission therein, mounted concentrically in an insulator rod through perpendicular coupling of the circular and rectangular waveguides.

Abstract: An improved feed horn for use with long f/D reflector antennae comprising an aperture having a plurality of protuberances orthogonally disposed around the periphery thereof, a conical section, a waveguide transition section and an impedance matching section.

Abstract: A rotatable polarized signal receiver in a system for receiving linearly polarized electromagnetic signals includes a signal conductor having a receiver probe portion, oriented in a circular waveguide parallel to the polarization of the incident signal, and signal launch probe portion extending into the rectangular waveguide orthogonal to the direction of signal transmission therein, mounted concentrically in an insulator rod through perpendicular coupling of the circular and rectangular waveguides.