Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1982-10-18
1985-07-30
Cangialosi, Salvatore
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 65R, 343 73, G01S 740
Patent
active
045325162
ABSTRACT:
In distance measuring equipment apparatus which includes an antenna; a transmitter/receiver coupled to the antenna to transmit interrogation pulses and receive responses from a ground station, the pulses being spaced apart, the ground station also transmitting other responses between the responses; and a data processor receiving video and gate signals from the transmitter/receiver and calculating therefrom the distance to the ground station in order to calibrate for receiver and installation delays. The receiving signal, other than when one of the responses is being received, is modulated. The phase of the resulting modulation on the video signal with respect to the phase of modulation at the modulator is detected to determine the receiver and installation delay.
REFERENCES:
patent: 2478208 (1949-08-01), Rothman et al.
patent: 4162495 (1979-07-01), Prill
patent: 4484194 (1984-11-01), Arvidsson
Prunty, "Automatic Transponder Calibration in DME Ranging Systems", IBM Technical Disclosure Bulletin, vol. 21, No. 2, Jul. (1978), pp. 546-551.
Drake James R.
Frampton Victor A.
Slump William R.
Cangialosi Salvatore
Kaiser K. R.
Kennedy Thomas W.
The Singer Company
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