ELECTROMAGNETIC ANTENNA Russian patent published in 2008 - IPC H01Q7/00 

FIELD: physics, radio.

SUBSTANCE: invention concerns radio technics. Electromagnetic antenna for use with antenna signal includes one or more insulated serial conductive circuits forming winding on a shape-forming element, reflector for the said antenna signal direction against the said winding and encircling the winding in concentric pattern, and electromagnetic screen positioned concentrically to the said winding. Conductive circuits are parallel to the shape-forming element surface, and reflector is at least partially cylindrical and encircles electromagnetic screen. Shape-forming element surface is at least partially flat and is perpendicular to the cylindrical reflector surface. Additional second and third windings are installed in antenna coaxially to the first winding. Main and additional windings can shift against each other. Surfaces of cylindrical reflector part and electromagnetic screen are opposing each other, and the gap between them is defined by dielectric strength conditions. Cylindrical reflector part and electromagnetic screen form multilayer cylindrical condenser. Length and internal diameter ratio for cylindrical reflector part is defined by correlation L/D≥2.5, where L is length, and D is diameter of cylindrical reflector part, and D<<λ, where λ is wavelength of signal transmitted to the antenna.

EFFECT: increased antenna signal transmission efficiency due to directional pattern narrowing and signal control, increased jamming resistance to alien electromagnetic signals; size minimisation and improved aerodynamic properties of antenna.

7 cl, 3 dwg