Instrument landing system (ILS) with simplified transmitter

Details Instrument landing system (ILS) with simplified transmitter Instrument landing system (ILS) with simplified transmitter

1976-02-19

1977-03-15

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

321 60, 343109, G01S 116, G01S 118, H02M 516

Patent

active

040127397

ABSTRACT:
An ILS (Instrument Landing System) having at least one of the Glide-slope and Localizer functions, each of said functions comprising course and clearance signals. For the course and clearance signals of either function, a single transmitter is supplied, the necessary frequency difference between those signals being obtained by dividing the transmitter output into two signals, one of which is uniquely phase modulated to produce a predetermined frequency offset with respect to the other.

REFERENCES:
patent: 2310202 (1943-02-01), Alford
patent: 3887922 (1975-06-01), Hofgen et al.
patent: 3965443 (1976-06-01), Towle et al.

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