AZIMUTH-ELEVATION ANTENNA ASSEMBLY WITH FOUR-MIRROR LIGHT GUIDE Russian patent published in 1997 - IPC

FIELD: antenna engineering. SUBSTANCE: antenna assembly used Cassegrain circuit arrangement with four-mirror light guide. It has reflector carrying last mirror of light guide with its last but one section having its axis aligned with axis of revolution in elevation. One of elevation supports mounted on azimuthal swivel part has hole whose diameter is large enough to pass light guide. One of light guide mirrors is fixed on bracket extended beyond mentioned support. Two other mirrors are fixed on swivel base installed on azimuthal swivel part for rotation about vertical axis aligned with light guide axis. Center of one of mirrors is aligned with axis of revolution of swivel base. Antenna feeds are installed for each frequency interval on azimuthal swivel part over circumference relative to axis of revolution of swivel base. The latter is provided with angular displacement and locking mechanism; feeds are inclined to axis of revolution of swivel base and are facing away from mentioned axis. EFFECT: reduced time of transfer from one frequency interval to other with antenna operating in several frequency intervals; facilitated installation of antenna assembly and its disassembly and transport to other position with minimal engineering preparation. 3 cl, 4 dwg