Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1977-11-04
1979-08-14
Lieberman, Eli
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343107, H01Q 326, G01S 108
Patent
active
041647432
ABSTRACT:
A drive arrangement for an instrument landing system (ILS) glidepath antenna array, the drive system providing for a shorter image ground than is required by the known null reference, sideband reference or M-array systems. The drive system is applicable to an antenna array structure which is similar to an M-array structure, but the drive signals are fundamentally different from the M-array drives and the resultant field pattern does not have the "scooped portion" characteristically associated with the M-array system. A three element array structure is employed, with SBO signals driving each of the elements and CSB signals driving also two of the elements.
REFERENCES:
patent: 3409890 (1968-11-01), Redlich
Lucas James G.
Young Alan C.
Lieberman Eli
University of Sydney
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