Radio frequency receiver circuit

Details Radio frequency receiver circuit Radio frequency receiver circuit

H - Electricity

04

B

H04B 10/26 (2006.01)

Patent

CA 2360403

A radio frequency (RF) receiver circuit (2) comprises: an antenna (8) for receiving a radio frequency (RF) signal (4); an optical detector (10) for receiving a modulated optical signal (12) and converting it to an electrical signal; means (14) for mixing the electrical and RF signals to produce an intermediate frequency signal; and a reflective optical modulator (16) which is operable at the intermediate frequency to modify and reflect (24) the modulated optical signal (12) with the intermediate frequency. By detecting the optical signal which has been modified by the circuit, it is possible to remotely detect the RF signal received by the circuit and the circuit thus acts as a remotely accessible RF receiver circuit.

L'invention porte sur un circuit récepteur (2) haute fréquence qui comprend: une antenne (8) destinée à recevoir un signal (4) haute fréquence (HF); un détecteur optique (10) destiné à recevoir un signal (12) optique modulé et à le convertir en un signal électrique; un organe (14) destiné à mélanger les signaux électriques et HF de façon à générer un signal de fréquence intermédiaire; et un modulateur (16) optique réfléchissant pouvant fonctionner à la fréquence intermédiaire de façon à modifier et renvoyer (24) le signal (12) optique modulé à l'aide de la fréquence intermédiaire. En détectant le signal optique modifié par le circuit, il est possible de détecter à distance le signal HF reçu par le circuit, le circuit fonctionnant ainsi comme circuit récepteur HF accessible à distance.

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