RU2217774C2 - Way to measure effective dispersion area of object and radar for its realization - Google Patents

Abstract

FIELD: radiolocation measurements, radars discriminating objects. SUBSTANCE: proposed way to measure effective dispersion area of object includes emission of sounding signal, measurement of power of received signal reflected from object, measurement of range to object and computation of effective dispersion area. In compliance with invention at least two additional measurements of power of received reflected signal are executed in vicinity of direction to object and power of signal that corresponds to position of maximum in radiation pattern of antenna is computed. EFFECT: increased accuracy of measurement of effective dispersion area of object thanks to diminished effect of form of radiation pattern of antenna on measurement results. 3 cl, 3 dwg

Description

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Claims (3)

1. The method of measuring the effective scattering area (EPR) of an object, including the radiation of a probing signal, measuring the power P _{m of the} received signal reflected from the object and the distance R to the object, characterized in that at least two additional signal radiations and power measurements p ₁ , P _{2 of the} received reflected signals in the vicinity of the direction to the object, calculating the power p _{p of the} signal, which corresponds to the maximum position of the antenna pattern (BOTTOM), with independent signal fluctuations, neg Agents from the object, according to the formula

Where

σ $\genfrac{}{}{0ex}{}{\text{2}}{\text{w}}$ - power of own noise; Δε, Δβ - beam pitch in elevation (ε) and azimuth (β), respectively, normalized to the corresponding beam width at half power level; α = 5.56 - coefficient determining the steepness of the exponent describing the shape of the main beam of the bottom, and calculating the EPR of an object from an expression

where p _ZS - power of the probing signal; p _{P -} power of the received reflected signal; G is the antenna gain; λ is the wavelength; R is the distance to the object, the radiation of the probe signal is produced with a sufficiently small delay, eliminating the distortion of the measurement results when moving the object. 2. A radar station containing a transmitter, an antenna switch, an antenna, a receiver, an indicator device, a synchronizer, while the output of the transmitter is connected to the input of the antenna switch, the input / output of which is connected to the antenna, the output of the antenna switch is connected to the input of the receiver, the output of the receiver and the coordinate the antenna output is connected respectively to the first and second input of the indicator device, the synchronizer outputs are connected to the sync inputs of the transmitter and indicator device, characterized in that additionally, an EPR object evaluation unit has been introduced, while the output of the receiver, the indicator device output and the transmitter output are connected respectively to the first, second and third inputs of the object EPR evaluation unit, an additional synchronizer output is connected to the sync input of the object EPR evaluation unit. 3. The radar station according to claim 2, characterized in that the EPR evaluation unit of the object contains serially connected measurement memories and an EPR computer, while the first and second and third inputs of the measurement memory are the corresponding inputs of the block, and the synchronized inputs of the measurement memory and calculator connected to each other EPR is a block sync input.

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