Multilayer radiating structure of variable directivity

Details Multilayer radiating structure of variable directivity Multilayer radiating structure of variable directivity

1994-06-01

1996-03-05

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Microstrip

343846, H01Q 138

Patent

active

054971640

ABSTRACT:
The invention relates to antennas, and more particularly to plane or shaped array antennas. The antenna of the invention comprises radiating sources having a multilayer dielectric/conductor structure and a multiplicity of coupled elements distributed over the interfaces between successive dielectric layers, all being fed by a single radiating patch situated at the bottom level of the antenna. The geometrical parameters of the conductive patches and their distribution within the successive layers giving rise to a high degree of flexibility in antenna design, in particular with respect to simultaneously optimizing antenna parameters such as: directivity, bandwidth, efficiency, polarization purity, and symmetry of the radiation pattern. These advantages of the invention stem mainly from the possibility of increasing the radiating aperture of a source without increasing the complexity of passive distributors for distributing the radiated signals. This is obtained by coupling elements together between levels, and by devising shapes that enable the equivalent radiating area to be increased at each successive level.

REFERENCES:
patent: 5005019 (1991-04-01), Zaghloul et al.
Lee et al, "Microstrip Subarray With Coplanar and Stacked Parasitic Elements", Electronics Letters, vol. 26, No. 10, 10 May 1990, pp. 668-669.
Revankar et al, "Broadband Stacked Three-Layer Circular Microstrip Antenna Arrays", Electronics Letters. vol. 28, No. 21, Oct. 8, 1992, pp. 1995-1997.

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