FIELD INDICATOR - FREQUENCY METER FOR UHF RANGE Russian patent published in 2006 - IPC G01R23/04 G01R29/08 G01R21/12 

FIELD: radio engineering, possible use for detecting radiations of low power uhf range radio-transmitting devices.

SUBSTANCE: device has a portion of coaxial line, commutating device, operation amplifier, circuit of negative check connection, two Schottky diodes, directing device, analyzing device and indicator. Commutating device connects input and output of coaxial line to each other. Schottky diodes are connected serially to each other. Anode of first diode is connected to inverting inputs of operation amplifier. Cathode of second diode is grounded. Output of coaxial line is connected to common point of diodes connection. Operation of device is based on determining value of fading of input signal in coaxial line, which depends on signal frequency. Therefore, device makes it possible to determine frequency of signals in UHF range.

EFFECT: improved efficiency.

1 dwg