Ring patch antenna

The purpose of the present application is to provide a ring patch antenna. The ring patch antenna is arranged to surround a circular ring. The ring patch antenna comprises: a radiation layer patch which is grounded; and a parasitic layer patch, wherein the effect of the parasitic layer patch is equivalent to that of a parasitic capacitor, the edge of the parasitic layer patch is provided with an even number of feed points and is connected with the radiation layer patch at the feed points, and the even number of feed points are uniformly distributed on the circumference of the circular ring andform a feed network. The ring patch antenna does not occupy extra space, the gain change amplitude is small, the effect of the parasitic layer patch is equivalent to that of the parasitic capacitance, the antenna size is significantly reduced in the resonance direction, and the radiation direction of the ring patch antenna is omnidirectional. 本申请的目的是提供一种环贴片天线，该环贴片天线围绕成一圆环进行设置，其中，该环贴片天线包括：辐射层贴片，所述辐射层贴片接地；寄生层贴片，所述寄生层贴片的作用等