| 摘要 |
<p>TITLE OF THE INVENTION A Directivity Diversity Communication System An improved diversity communication system which has a single micro-strip antenna has been found. The microstrip antenna according to the invention comprises a thin dielectric layer sandwiched by a ground conductor plane and a radiation conductor plane, a pair of feed points on the radiation conductor plane through the holes on the ground conductor plane, and said feed points being positioned so that a line between a first feed point and a center of the radiation conductor plane is substantially perpendicular to a line between a second feed point and a center of the radiation conductor plane. Each of the feed points is coupled with each branch input of a diversity receiver, and those feed points operate like separated two antennas, which have a pair of perpendicular directivities. Preferably, a radiation conductor plane is circular with a plurality of slots along the periphery of the same. The feed points of the present micro-strip antenna have little correlation between the same. The present invention is advantageous in particular for mobile communication as the size and/or the height of the antenna</p> |
