Patent ID: 8502734

Claim:
Printed antenna for mobile communication cellular networks comprising a ground plane (P), a substrate (S) stacked to the ground plane, a metal deposit made on the substrate in order to form therein a resonating patch ( 3 , 6 , 7 , 10 , P), and a coaxial probe configured to excite the resonating patch, wherein the patch is a square patch having sides with dimensions substantially equal to k*λ S where k is a strictly positive integer and λ s is the guided wavelength in the substrate, thereby being able to radiate in both upper electromagnetic modes TM 02 and TM 20 , and wherein the coaxial probe is configured to excite the patch on an excitation point ( 4 , 8 , 9 , 1 1 - 15 , E) arranged on one side of the patch at substantially ¾*k*λ s from one of the vertices of the square patch so that the patch resonates dominantly in a single one of said upper electromagnetic modes, by inducing in this way a dual-beam radiation pattern with, in a same plane orthogonal to the patch, two main misaligned lobes that are symmetric in relation to the normal to the patch, said antenna further comprising means of capacitive compensation ( 5 ) in order to reduce an inductance of an input impedance of said antenna supplied by the coaxial probe, said means of capacitive compensation ( 5 ) taking the form of an extension of the patch around the excitation point, said extension having a surface substantially equal to that of a half-disk of radius Re=4*h where h designates the thickness of the substrate.