Electronic switching arrangement for a homing and traffic radio

Details Electronic switching arrangement for a homing and traffic radio Electronic switching arrangement for a homing and traffic radio

1976-03-10

1977-06-07

Safourek, Benedict V.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343113R, H04B 152

Patent

active

040286240

ABSTRACT:
A switching arrangement which, in conjunction with a single radiating arrangement comprising two antennas, allows multiple functions to be provided, in particular reversals and switching operations corresponding to the operating modes represented by homing radio direction-finding and traffic radio transmission and reception. The arrangement has switching devices, a phase-shifting element and a 0 - .pi. hybrid junction, to produce two paths which start from two terminals connecting it to associated radiating antennas and run to a third terminal for connecting it to a transmitter/receiver, so that the paths are of the same electrical length in the traffic mode of operation and are out of phase by (2.pi.D)/.lambda. + .pi. in the homing mode, .lambda. being the wavelength and D the distance between the said antennas predetermined at most equal to a quarter of the minimum wavelength of the operating band.

REFERENCES:
patent: 3202986 (1965-08-01), Cordry
patent: 3329897 (1967-07-01), Preble

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