초록 ▼

A dual mode target seeking system for airborne vehicles which operates under two different frequencies simultaneously includes a radio frequency antenna comprising a slotted plate defining a ground plane with an image plate positioned in front of the ground plane at a distance chosen such that multi

A dual mode target seeking system for airborne vehicles which operates under two different frequencies simultaneously includes a radio frequency antenna comprising a slotted plate defining a ground plane with an image plate positioned in front of the ground plane at a distance chosen such that multiple reflected rays are in phase with each other and with waves incident on the image plate. The slotted plate and image plate have aligned central openings through which an electro-optical system for operating under a chosen electro-optical frequency range, for example under infrared frequencies, projects. The electro-optical system includes a detector unit positioned behind the antenna and a focussing system for directing incoming electro-optical radiation into the detector unit. The focussing system includes first and second lenses mounted in the openings in the image plate and slotted plate, respectively. The lenses each transmit radiation in the chosen electro-optical frequency range while at least partially reflecting radio frequency radiation.

대표청구항 ▼

A dual mode target seeking system for an airborne vehicle, comprising: a radio frequency antenna structure including an antenna plate having an antenna array across its surface for receiving and transmitting radio frequency radiation, the plate having an outer surface defining a ground plane, means

A dual mode target seeking system for an airborne vehicle, comprising: a radio frequency antenna structure including an antenna plate having an antenna array across its surface for receiving and transmitting radio frequency radiation, the plate having an outer surface defining a ground plane, means for transmitting signals to said antenna array and means for receiving signals incident on said array; and an electro-optical processing system extending through said radio frequency antenna structure and including directing means for directing incoming electro-optical radiation to a point behind said radio frequency antenna; the directing means including a window mounted in said antenna plate with its outermost face substantially flush with said ground plane to form a substantially continuous surface with said antenna plate, said window comprising means for transmitting radiation in said predetermined electro-optical frequency range and for at least partially reflecting radio frequency radiation.