Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1975-11-06
1977-09-06
Wilbur, Maynard R.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
325400, G01S 144
Patent
active
040471764
ABSTRACT:
A method for the comparative vector measurement of keyed radio signal pulses, in particular Tacan pulses, arriving nearly simultaneously at several receiving stations and which can exhibit great level differences, in which, at each receiver, the pulses are initially fed to an amplifier or attenuator having amplification or attenuation, respectively, which can be adjusted in distinct steps, which reduction or increase takes place automatically with the rise of the leading edge of the respective signal pulse. After passing through the respective amplifier or attenuator of the receivers, the instantaneous amplitudes of the measuring signals are measured at a fixed measuring time common to all receivers. In each receiver a second measuring signal is produced which is in phase quadrature with respect to the aforementioned measuring signal, the instantaneous amplitude of the second measuring signal being measured at the same time as the first measuring signal.
REFERENCES:
patent: 3305787 (1967-02-01), Distler et al.
patent: 3361971 (1968-01-01), Eaves
patent: 3526849 (1970-09-01), Dishal et al.
patent: 3831095 (1974-08-01), Mounce
Blum T. M.
Siemens Aktiengesellschaft
Wilbur Maynard R.
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