Circuit for the comparative vector measurement of radio signal p

Details Circuit for the comparative vector measurement of radio signal p Circuit for the comparative vector measurement of radio signal p

1976-12-23

1978-08-22

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343106R, G01S 506

Patent

active

041092503

ABSTRACT:
A circuit for the comparative vector measurement of keyed radio signal pulses, in particular DME pulses which arrive virtually simultaneously in a plurality of receivers and which can exhibit large level differences is utilized where, in each receiver, the pulses are fed to a switching amplifier which has an amplification which is adjustable in discrete stages and the reduction of which is effected automatically with the rise in the leading edge of the relevant signal pulse, and where, when the relevant switching amplifier of the receivers has been traversed, at a specific measuring time which is common to all receivers, the instantaneous amplitudes and instantaneous phases of the measuring signals are measured, the circuit providing that the pulses are fed to the switching amplifier by way of a delay device and, that for the setting of the amplification of the switching amplifier, a control circuit is provided which is directly fed with the radio pulses and which comprises a logarithmic amplifier and a subsequently connected analog-digital converter which is constructed as a comparator chain operating in parallel operation.

REFERENCES:
patent: 3305787 (1967-02-01), Distler et al.
patent: 3714573 (1973-01-01), Grossman
patent: 4047176 (1977-09-01), Pieverling

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