Ring-loaded multi-notch broadband omnidirectional antenna

The utility model relates to a ring-loaded multi-notch broadband omnidirectional antenna, which comprises an upper radiation fin (1), a parasitic radiation paster (2), a lower radiation fin (3), a medium substrate (4), a floor board (5), an installation fixing plate (6), a main feeder (7), an antenna cover (8) and a feeding point (9). A loading ring (17) is arranged on the upper radiation fin (1) and the parasitic radiation paster (2), wherein the loading ring (17) is arranged at a tail end vertical to a regular shape before the gradation of the upper radiation fin (1) and the parasitic radiation paster (2). On the one hand, a loading ring antenna improves the ununiformity of a directional diagram on an azimuth plane advantageously, and improves the symmetrical characteristic of the directional diagram on a vertical plane; on the other hand, the loading ring is connected with a radiator of an original antenna; for the original antenna, a ring is connected in parallel with the original antenna equivalently, wh