RADIOPHOTONIC BROADBAND RECEPTION TRACT ON THE BASIS OF WHISPERING MODE MODULATOR WITH LASER NOISE SUPPRESSION Russian patent published in 2018 - IPC G02F1/01 H04B10/70 

FIELD: radio engineering and communications.

SUBSTANCE: invention relates to radio photonics, including technique of receiving weak broadband radio signals, for example, from antennas and antenna arrays. Claimed radio photon wideband receiving path based on a whispering mode modulator with suppression of laser's noise comprises a laser, optical transmission line, an optical communication device with whispering mode modulator, a source of a modulating radio signal (antenna), whispering mode modulator, and an optical filter. Symmetrical optical splitter 1:2 is additionally introduced into declared radiophoton broadband receiving path, symmetric optical transmission line, narrow-band optical filter, optical communication device with whispering mode modulator, optical filter and balanced photodetector. Moreover, a relatively broadband optical pumping signal from laser is fed to optical input of symmetric optical splitter (1:2), optical outputs of which are connected to two optical transmission lines, which are connected to the first and second narrow-band optical filters, the outputs of which are connected through the first and second optical communication devices with whispering mode modulator. Electrical input of whispering mode modulator is connected to radio frequency signal source (antenna), and its symmetric optical outputs are connected to the first and second optical filters, outputs of which are connected to the first and second optical inputs of balanced photo detector, electrical output of which is the output of radiophoton receiving path.

EFFECT: sensitivity, dynamic range are increased, noise figure is reduced, there is no need for low-noise electronic amplifiers between antenna and optical whispering mode modulator, obtaining the energy independence of receiving antennas and, as a result, resistance to EMR, SRI and interference.

1 cl, 3 dwg