Lantvoyt M. Improved accuracy and functionality of monopulse radar using the signals with a rectangular bypass of spectrum

The thesis is devoted to theoretical and applied research on improving methods of Multifrequency phase method of measurement the range and the radial velocity of air targets in the airfield area. Are founded analytical expressions of describing the relationship between the signals, which reflected from each object, and the total reflected signal within the parameters of the medium of radio wave propagation and receiving and transmitting equipment. The process of transformation of spectrum probing signal in the high frequencies and the reverse process of becoming a zero frequency and intermediate frequency to the total reflected signal. It is shown that measuring information in this case is placed in the phase shift, the amplitude and frequency of the total reflected signals. Mathematical modeling of measurement range by using multifrequency phase method showed that a decrease in the frequency instability of the probe signal and the error signal measurement vectors total measurement error range is reduced. This decreases the standard deviation and range. Calculations error range coincide with the data obtained by mathematical modeling. It was found that for sensing objects at a distance of 100 km is appropriate to use a step frequency of 50 kHz, the instability of the oscillator frequency signal of at least 10-6 f, measurement error 1/1024 of amplitude, phase shift measurement error is not more than 0,1°. Measurement error range does not exceed 50 m.