NOISE MATCHING IN COUPLED ANTENNA ARRAYS Russian patent published in 2014 - IPC H01Q21/00 G01R33/3415 G01S7/03 

FIELD: physics, communications.

SUBSTANCE: invention relates to antenna engineering and is intended to receive radio-frequency signals in radio communication, mobile communication, radar and radio astronomy. The signal-to-noise ratio optimisation method includes switching input impedance, which is presented to a matching circuit in each receiving channel, to a complex conjugated optimum impedance of the corresponding low-noise amplifier; receiving radio-frequency signals through receiving antennae; generating a superimposed signal from the received radio-frequency signals; modifying the matching circuits of all receiving channels in order to find the optimum matching condition based on the superimposed signals; switching the input impedance in each receiving channel back to a value for normal operation of the system. The system comprises an array of two or more receiving antennae for receiving radio-frequency signals, matching circuits, low-noise amplifiers which present the input impedance to corresponding matching circuits which convert optimum impedances of the low-noise amplifiers, wherein the optimum impedances provide an optimum noise characteristic for the low-noise amplifiers.

EFFECT: high sensitivity of receiving radio-frequency signals.

9 cl, 4 dwg