A Circularly-Polarized Beam-Shaped Antenna

In this paper, a circularly-polarized beam-shaped antenna has been proposed. The phase delayed power devider is used as the feeding network of the antenna. By the method of simulation, the design indicates the antenna obtains low reflection coefficient, and generates beam which swicthes off about 15 degrees. The gain of the antenna is about 10dB and the antenna covers 35 degrees in the H-plane, 120 degrees in the E-plane with the gain greater than 5dB beam width. The antenna has been used as a dual-antennas communication system to achieve omnidirectional beam. It can be widely applied to communication and measurement systems.