Coplanar antenna for proximate surveillance systems

Details Coplanar antenna for proximate surveillance systems Coplanar antenna for proximate surveillance systems

1985-01-07

1986-12-30

Blum, Theodore M.

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

Presence detection only

340572, 340552, 343742, G01S 1300, G08B 1314

Patent

active

046332502

ABSTRACT:
A coplanar antenna system has an interrogating means adapted to generate time varying magnetic field components within a region proximate thereto and a receiving means adapted to detect magnetic field components within a region proximate to the antenna system. The interrogating means has a plurality of coils configured such that the components thereof have near zero net resultant magnetic field. At least one coil of the receiving means is configured to detect components thereof having a preselected net resultant magnetic field.

REFERENCES:
patent: 4207560 (1980-06-01), Poirier
patent: 4260990 (1981-04-01), Lichtblau
patent: 4373163 (1983-02-01), Vandebult

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