Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1975-02-06
1976-12-21
Wilbur, Maynard R.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343108M, 343854, H01Q 326
Patent
active
039991822
ABSTRACT:
An antenna and scanning means therefor particularly useful in an aircraft landing system operating in the microwave frequency range. The antenna is of the line phased array type which includes digitally controlled phase shifters for each of the radiating elements of the array. The beam formed by the antenna is steered by incrementing the phase shift applied at each of the array radiating elements by an amount of phase which is dependent in part upon the position of the radiating element in the array. Phase increments sufficient to shift the beam position by one coarse step (0.1.degree.) are applied to symmetrically located radiating element pairs, pair by pair, until all elements have been incremented. The beam is thereby caused to move through one coarse step in a number of fine steps equaling the number of pairs of elements in the array. An additional feature of the scanning means is the application of phase increment to the array elements in a pseudo-random sequence.
REFERENCES:
patent: 3747098 (1973-07-01), Kirkpatrick et al.
patent: 3887926 (1975-06-01), Schwartz et al.
Jaeckle by Margarete Gesina
Jaeckle, deceased Wilfried G.
Jaeckle, heirs by Volkmar Gerhard
Moeller Alvin W.
Paskalakis Lucas G.
Berger Richard E.
Christoforo W. G.
Lamb Bruce L.
The Bendix Corporation
Wilbur Maynard R.
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