Arrangement for compensation of unwanted echoes caused by the mo

Details Arrangement for compensation of unwanted echoes caused by the mo Arrangement for compensation of unwanted echoes caused by the mo

1982-11-01

1986-02-04

Buczinski, S. C.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 7PL, G01S 1358

Patent

active

045689393

ABSTRACT:
In order to compensate the unwanted echo caused by the movement of a moving radar device, an arrangement is provided between the output of a coherent oscillator and the input of a phase discriminator. This arrangement comprises a signal processing stage containing two series-connected phase regulating circuits, namely phase-locked loops. The output signal of the first phase-locked loop displays a mixed frequency which is formed by the sum of the frequency of the output signal of a signal generator and a displacement frequency modulated by the Doppler frequency of the unwanted echo caused by the movement of the radar device. In the second phase-locked loop the output signal of the first phase-locked loop is mixed with a further signal containing the displacement frequency.

REFERENCES:
patent: 4062011 (1977-12-01), Preston et al.
patent: 4335383 (1982-06-01), Berry

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