A low sidelobe, directive antenna at 2200 MHz

Mobile communications have grown rapidly these last few years. UMTS will be soon available. This novel activity has generated new research in the antenna domain. Compact antennas or multiband antennas are two examples of these new developments. To improve mathematical models for propagation in various environments, our laboratory was involved in the design of an antenna exhibiting the following performance: beam width at 3 dB under the maximum, around 15 degrees; sidelobe level less than -25 dB under the maximum; frequency band 100 MHz around 2200 MHz; polarization vertical; rear gain around -30 dB under the maximum gain. As the antenna is to be mounted on a rotating arm for the characterization of the direction of arrival of the microwave signal, the mass of this antenna must be light