Wideband radar optical control device for receiving or transmitting

摘要

The circuit enables optical control of electronic scanning aerials. The device includes an assembly of optical circuits for creating delays, each receiving a first light beam of wavelength lambda 1 polarised in a first direction which is subject to an appropriate delay, and a second beam of wavelength lambda 2 polarised in a second direction. Each delay circuit (42) has a chromatic separator (CD) separating the wavelengths. A radiating aerial (EDk) is connected to the output of the delay circuit by a first photodetector (PD1). The two beams are modulated at the transmission frequency (fe) for each reception signal arriving from the radiating element (EDk). A local oscillator and hyperfrequency mixer are used to produce the final output signal from the device.