Guidance systems

Details Guidance systems Guidance systems

1976-09-14

1978-06-06

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343109, 343728, 343742, G01S 110, G01S 118

Patent

active

040939529

ABSTRACT:
A guidance system for aircraft and ships, which system comprises at least two localizer antenna arrangements which are spaced in elevation above a reflecting surface, at least two distance measuring antenna arrangements which are spaced in elevation above the reflecting surface, and at least two glide slope antenna arrangements which are mounted vertically above each other, the guidance system being such that the localizer antenna arrangements are at a mean height of at least 21/2 wavelengths above the reflecting surface and are fed with signals having the same radio frequency but having a phase difference, the distance measuring antenna arrangements are at a mean height of at least 25 wavelengths above the reflecting surface and are fed with signals having the same radio frequency but having a phase difference, and the glide slope antenna arrangements are fed with signals having the same radio frequency but two different frequencies of amplitude modulation to give by reflection from the reflecting surface at least two consecutive glide slopes in the same sense.

REFERENCES:
patent: 2434934 (1948-01-01), Kitzerow
patent: 3409890 (1968-11-01), Redlich
Avionics Navigation Systems, M. Kayton and W. R. Fried, John Wiley & Sons, 1969, pp. 162-163, 528-539.

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