| 摘要 |
FIELD: physics, radio. ^ SUBSTANCE: invention is related to radio engineering and may be used in radio receiving devices to detect subminiature radio signals. Method is based on application of two channels with identical resonant circuits and deduction process. Resonant circuits at the moment of time t0 are excited by means of short-term and simultaneous supply of voltage, which is more than mean-square voltage of noise and interference in them. At the same time radio signal from antenna is supplied to both channels. Phases of inlet signals are serially modified in resonant circuits by means of phase shifts and introduction in channels with opposite signs. Upper envelopes of summary signals of resonance circuits - SA1(t) and SA2(t) are separated. Difference of these envelopes is defined - öSA(t). When difference of envelopes achieves maximum value - öSA, introduced phase shifts and are fixed. Useful coefficient is generated with amplitude xm=öSA/2(l-exp(-, t)), where is attenuation factor of circuits, and phase defined as mean average of phase shifts and taken with negative sign. ^ EFFECT: provision of possibility to receive radio signals beyond threshold of radio receiver sensitivity. ^ 4 cl, 9 dwg |
