SU1233060A1 - Modulation radiometer - Google Patents

Description

"12330602

The invention relates to radio only odd harmonics of the input nickname and can be used for a signal. Each 6 meter synchronous filter | neither the power of the radiothermal tuned to the frequency Ij io / k; . Signals in passive radar and radio telescopes.

The purpose of the invention is to increase the sensitivity of the radiometer.

FIG. 1 is a structural view.

electrical modulation circuit

The output from the output of the synchronous filter 6 5 is detected in the synchronous detector 7 and after summation in the adder 3 enters the recorder 11. The principle of operation of the synchronous detector 7 is the same as in the known device and the radiometer; in fig. 2 - diagrams are 10 times as follows. The signal from the output of the jth solutions at the characteristic points of the radiometer-synchronous filter 6 is multiplied by pa (for and 2).

The modulation radiometer contains

switch 1, generator 2 of the reference in the j-th frequency divider 9. The principle of noise, P-input adder 3, effort-15 work of the adder 3 and the recorder 11 tel 4 high frequency, quadratic the same as in the known device, detector 5, h synchronous filters 6, P synchronous detectors 7, generator 8 square wave, and dividers 9 frequency.

the reference oscillation of the rectangular shape of frequency ij, which is formed

The modulation radiometer operates in the following way.

The signal being processed is fed to the second signal input of switch 1. The oscillation of the reference frequency i,

compensation radiometer,

Claims (1)

Invention Formula Thus, in the proposed device, only one USI-P-10 SHS-10 element and a high-frequency recorder are used and therefore the level of self-noise is reduced by N times. compared to the known device. Since the filling factor of the modulating oscillation period increases with h, it tends to unity, and the synchronous detectors receive a signal produced in the generator 8 of Fig. 2) with a filling factor of 0.5., The input of the proposed radiomet- The cells whose division coefficients do not tend to limit sensitivity are equal to each other (for example, when related by the K, K 2: 3 ratio). From the output of the voltage frequency dividers 9 (Fig. 25, b) go to h - input element OR 10, from the output of the modulator35 Modulation radiometer, containing a series-connected switch and high-frequency amplifier, 7-input adder, the output of which is connected to the recorder and the inputs to the outputs of the corresponding t synchronous detectors, the reference noise generator, the output of which is connected to the first signal input of the switch, the second signal input of which is the input of the radiometer, the square wave generator, which differs from increase the sensitivity of the radiometer; i) introduces the D) input element OR, Appears as useful components 50 whose output is connected to a control at frequencies; - (Zi-1) i / K j, switch input, quadratic detector, the input of which is connected to the output of the high-frequency amplifier, h synchronous filters, the outputs of each 55 of which are connected to the signal input of the corresponding synchronous detector, and the signal inputs - from the voltage of the modulating signal (Fig 2 g) is fed to the control input of the switch 1, the first signal input of which receives a signal from the output of the reference noise generator 2. Switch 1 modulates the input signals according to the law of modulating voltage (Fig. 2 ||), The modulated signal is fed to the input of the amplifier 4 high frequency, from its output - to the input of a quadratic detector 5. As a result of nonlinear transformations in the spectrum of the signal at the output of a quadratic detector 5 (FIG. 2e) 45 where Kj is the division factor of the j -th frequency divider 9, as well as their combination components, which are fed to the inputs of synchronous filters 6. The frequency response of synchronous filter 6 has a comb shape, with its output being represented by a quadratic detector, fj denal from the output of synchronous filter 6 is detected in the synchronous detector 7 and after summation in the adder 3 is fed to the recorder 11, the principle of operation of the synchronous detector 7 is the same as in the known device and is as follows. Chron filter 6 is multiplied by in the j-th frequency divider 9. The principle of operation of the adder 3 and the recorder 11 is the same as in the known device the reference oscillation of the rectangular shape of frequency ij, which is formed compensation radiometer, Invention Formula even detectors receive a signal with a fill factor of 0.5., then the sensitivity of the proposed radiometer tends to the limiting sensitivity. 3.12330604 frequency modules with different Iff and p-input FDI element and control units. The inputs of which are connected by the connecting inputs of the corresponding terminals to the output of the square wave generator, chronic filters and synchronous detec- tors, with the corresponding inputs, / Y / Y / 2 L + / 2 3fz 2 Editor O. Golovach Compiler B, Rakov Tehred O. Sopko Proofreader M. Samborska Order 2764/46 Circulation 728 Subscription VNISHI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 DL