Patent ID: 6342855
Filing Date: 2002-01-29
Classification: H01Q

Abstract:
A planar antenna, in particular for mobile radio, the planar antenna (1) having two conductive layers arranged at a predefined distance from one another and the conductive layers being plates (2, 12, 20, 20â€²; 3, 13, 30, 30â€²), the first layer (2, 12, 20, 20â€²) having a surface that is symmetrical with respect to a symmetry axis (15) and the second layer (3, 13, 30, 30â€²) whose shape comprises a portion of the shape of the first layer, the second layer being formed by taking an area of identical dimensions as the first layer and removing a section along a straight line (4, 14, 40, 40â€²) extending at right angles to the symmetry axis (15), and the line of the second layer forming a rectilinear edge, and the two layers being conductively connected to one another, the conductive connection being made by point or strip connection elements (5, 19) on the border (8, 18) of the layers, wherein the first layer (2, 12, 20, 20â€²) and the second layer (3, 13, 30, 30â€²) are designed with a circular border, and the circular borders of the two layers are congruent, the second layer being reduced compared with the area of the first layer by a chord portion, the chord corresponding to the line (4, 14, 40, 40â€²).