Abstract: A polarized receiving apparatus in which there is provided a first waveguide for transmitting polarized signals and a second waveguide secured to the first for receiving polarized signals at one end thereof. An antenna means is provided having integrally formed portions including a receiver probe portion disposed in the second waveguide and extending generally axially of the second waveguide for receiving one polarization of the incident signal, a launch probe portion concentric with the axis of the first waveguide and extending generally axially of the first waveguide for launching said signal therein, and a drive portion intermediate the receiver and launch probe portions with said drive portions including a first gear. A drive source is supported in a housing member which defines the first waveguide and this drive source comprises at least a second gear adapted to mesh with the first gear for driving the antenna means.

Abstract: A circular waveguide dual antenna feed for TVRO reception, which transfers horizontally and vertically polarized received signals in the circular waveguide simultaneously into two coaxial lines parallel with and offset from the circular waveguide axis. For coupling to existing LNA's, the separate coaxial lines from the circular waveguide are extended into a rectangular waveguide which couples to the input-mixer of the conventional LNA. Alternatively, the separate coaxial lines can be coupled separately to two LNA's or they can be combined into a single output terminal. Switching means are provided in each channel so that each channel can be rendered operative or inoperative, as desired. Diode switches are shown. The device requires no moving parts.

Abstract: A polarized receiving apparatus in which there is provided a first waveguide for transmitting polarized signals and a second waveguide secured to the first for receiving polarized signals at one end thereof. An antenna means is provided having integrally formed portions including a receiver probe portion disposed in the second waveguide and extending generally axially of the second waveguide for receiving one polarization of the incident signal, a launch probe portion concentric with the axis of the first waveguide and extending generally axially of the first waveguide for launching said signal therein, and a drive portion intermediate the receiver and launch probe portions with said drive portion including a first gear. A drive source is supported in a housing member which defines the first waveguide and this drive source comprises at least a second gear adapted to mesh with the first gear for driving the antenna means.

Abstract: A microwave harmonic absorption filter is disclosed which has an extended single mode pass-band ranging over one or more octaves as well as enhanced attenuation in the stop-band. This filter has a primary, rectangular waveguide having one or more ridges on the inner surfaces of its elongated wall members. Secondary waveguides are provided on the outer surfaces of these wall members and these secondary waveguides serve to diminish propagation of microwave energy in the stop-band. Apertures extend through the wall members of the primary, ridged, rectangular waveguide so that microwave energy within the range of frequencies of the stop-band can be transmitted from the primary waveguide into the secondary waveguides.