Radio interferometric antenna for angle coding

Details Radio interferometric antenna for angle coding Radio interferometric antenna for angle coding

1997-01-28

1998-09-22

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

342156, 342442, G01S 502

Patent

active

058120912

ABSTRACT:
An antenna array for radio interferometry uses three equi-spaced triplets set vertically above the ground with different respective spacings, the center antenna of each triplet being at a different height. Signal processing circuits provide for each triplet a signal which is a function of the elevation angle .theta. but is independent of the ground reflection coefficient, P. the signals are weighted to give the optimum value of .theta., e.g., by selecting the signal varying most rapidly with .theta.. Some antennae can be shared and for example three triplets may be provided by seven antenna elements.

REFERENCES:
patent: 3842419 (1974-10-01), Arndt
patent: 4368469 (1983-01-01), Ott et al.
patent: 4509052 (1985-04-01), Cash
patent: 4638320 (1987-01-01), Eggert et al.
patent: 4673944 (1987-06-01), Graves
patent: 5010343 (1991-04-01), Andersson
patent: 5153594 (1992-10-01), Moffat
patent: 5570097 (1996-10-01), Aguado
White, "Low-Angle Radar Tracking in The Presence of Multipath", IEEE Transactions on Aerospace and Electronic Systems, vol. AES-10, No. 6, Nov. 1974, pp. 835-845.

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