Patent ID: 8717252
Filing Date: 2014-05-06
Classification: H01Q

Abstract:
1. A dual frequency antenna, comprising a radiant body with a helical structure electrically connected to a host machine through a feed point of the host machine, wherein the radiant body has a lower end arranged as a first radiator for generating resonance and an upper end arranged as a second radiator for generating resonance at a higher frequency than that of resonance of the first radiator, and the helical structure of the second radiator has a larger pitch than that of the helical structure of the first radiator, and wherein the radiant body further comprises a linear third radiator connected with the top of the second radiator and provided with a free end extending inside the helical structures formed of the first and second radiators toward the feed point, wherein the first radiator operates at UHF frequency band, the second radiator operates at GPS frequency band, and the linear third radiator performs tuning by coupling with the first radiator and the second radiator.