Andrew Corporation

Rosenberger Technologies Co., Ltd.

Stephen W Simms

Junaid Syed

Matthew Robert Lewry

Ronald Joseph Brandau

Ian Thomas Renilson

Douglas John Cole

Steven Bell

Chistopher D Hills

The present invention discloses a dual-frequency feed-source module and a dual-frequency microwave antenna, wherein the dual-frequency feed-source module mainly comprises two coaxially arranged waveguides, the two waveguides respectively provide microwave energy of two different frequency bands to radiating portions for feeding, so that the antenna can be operated in different frequency bands at the same time. The combination of the two coaxial waveguides, a reflector and other structures can form different microwave antennas such as a feedforward dual-band microwave antenna and a feedback Cassegrain dual-band microwave antenna. The invention feeds microwave energy through the two waveguides, so that the antenna can be operated in two frequency bands at the same time, thus greatly expanding an application range of the microwave antenna.

Dual-frequency feed source assembly and dual-frequency microwave antenna

A front feed reflector antenna with a dish reflector has a reflector focal length to reflector diameter ratio of less than 0.25. A wave guide is coupled to a proximal end of the dish reflector, projecting into the dish reflector along a longitudinal axis. A dielectric block is coupled to a distal end of the waveguide and a sub-reflector is coupled to a distal end of the dielectric block. A shield is coupled to the periphery of the dish reflector. The sub-reflector diameter is dimensioned to be 2.5 wavelengths or more of a desired operating frequency.

Low sidelobe reflector antenna

An antenna reflector includes a central segment with a peripheral coupling portion and a plurality of peripheral segments, each provided with a reflector portion and a shield portion. A proximal portion of each shield portion is dimensioned to couple with the peripheral coupling portion, a reflector portion edge of each peripheral segment is dimensioned to couple with adjacent reflector portion edges and a shield portion edge of each peripheral segment is dimensioned to couple with adjacent shield portion edges. The central segment and the reflector portion of the peripheral segments together form a reflector dish. The shield portions together provide a circumferential shield extending from a periphery of the reflector dish along an antenna boresight of the reflector dish.

Segmented antenna reflector with shield

An enclosure for the open end of a reflector antenna includes a cylindrical shroud coupled to a distal end of the reflector antenna, the shroud generally coaxial with a longitudinal axis of the reflector antenna. A retaining band is coupled to an inner diameter of the shroud, proximate a distal end of the shroud. The retaining band is provided with a retaining groove open radially inward towards the longitudinal axis. The retaining groove provided with a bottom extending radially outward beyond an outer diameter of the shroud. A radome is seated within the retaining groove.

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Dunferminline, United Kingdom

Stephen W Simms