Patent ID: 7064724

Claim:
A multiband planar antenna comprising: a substrate with a ground plane, a first slot in the ground plane consisting of a closed curve dimensioned for operation at a first frequency, a second slot in the ground plane consisting of a closed curve dimensioned for operation at a second frequency, a common supply line exciting the first and the second slots, a two-state control element being provided between a free end of the supply line and the ground plane, the first slot being positioned along the common supply line at a first point such that the coupling of the line with the first slot is implemented in an electrical plane of the supply line of a first type, the second slot being positioned along the common supply line at a second point, such that the coupling of the line with the second slot is implemented in an electrical plane of the supply line of a second type so that according to the state of the control element, the antenna operates either at the first frequency or at the second frequency.