Abstract: An antenna feed system having a single corrugated horn wave guide ports in one of the corrugations, a combiner network which receives signals at approximately 20 GHz from the four wave guide ports and provides sum and difference signals, and a transducer which provides transmit signals at approximately 30 GHz and approximately 44 GHz to a rear end of the single horn.

Abstract: An antenna feed system having a single corrugated horn wave guide ports in one of the corrugations, a combiner network which receives signals at approximately 20 GHz from the four wave guide ports and provides sum and difference signals, and a transducer which provides transmit signals at approximately 30 GHz and approximately 44 GHz to a rear end of the single horn.

Abstract: An antenna feed system comprises a single horn having corrugations and four evenly spaced waveguide ports on sides of a single one of the corrugations. A combiner network receives signals at approximately 20 GHz from the four waveguide ports and outputs sum and difference output signals. A transducer provides transmit signals at approximately 30 GHz and approximately 44 GHz to a rear end of the single horn.

Abstract: An antenna feed system comprises a single horn having corrugations and four evenly spaced waveguide ports on sides of a single one of the corrugations. A combiner network receives signals at approximately 20 GHz from the four waveguide ports and outputs sum and difference output signals. A transducer provides transmit signals at approximately 30 GHz and approximately 44 GHz to a rear end of the single horn.

Abstract: A reflector antenna system with multiple feeds each operating in a separate frequency band. The antenna system includes a main parabolic reflector and an ellipsoidal subreflector configured in a Gregorian arrangement. Mutual blockage between the multiple feeds is reduced by their orientation and arrangement. The system includes a transversely positioned feed and an axial feed located in the focal region of the main reflector. The transverse feed may be integral with the subreflector. The system also includes a third feed placed at the virtual focal point of the subreflector.

Abstract: A variable microwave power divider which includes an orthomode transducer having a first section capable of supporting a vertically polarized wave and a second section capable of supporting two orthogonal linearly polarized waves. Suitable probes for inserting or extracting RF energy are coupled to each section. A similar orthomode transducer is connected to the first transducer through a circular hollow waveguide with the transducers being angularly offset from one another a predetermined angular amount. A septum is positioned within the waveguide which is fixed thereto at one end with the other end being controlled to a predetermined spiral configuration in order to direct RF energy flowing through the waveguide to the sections of one transducer in a determinable manner.