Collision avoidance system for aircrafts

Details Collision avoidance system for aircrafts Collision avoidance system for aircrafts

1976-08-13

1978-08-15

Buczinski, S. C.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343112CA, G01S 956

Patent

active

041076745

ABSTRACT:
A collision avoidance system for aircraft in which one aircraft is equipped ith an interrogation station having a secondary surveillance radar. Coarse distance measurement is effected either by passive or active distance measurement or by both of them. If the detected distance lies within a certain limit, the output power and/or period of the interrogation signal of the secondary surveillance radar of the subject aircraft is altered so as to effect fine distance measurement. This system can be applied without increasing interference against the existing secondary surveillance radar system by keeping the output power and period of interrogation signal in a minimum required extent. By the same reason the system can keep the interference at a small extent between proximate aircraft, each mounting this collision avoidance system.

REFERENCES:
patent: 3750168 (1973-07-01), Schrader
patent: 3757324 (1973-09-01), Litchford
patent: 3772691 (1973-11-01), Hansen

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