Research on Broadband and High-Gain Quasi-Yagi Antenna and Array

In order to obtain broadband and high-gain, a sort of planar printed quasi-Yagi antenna element and array, which operating in S-band, are proposed. The antenna element can be divided into two parts: the feeding unit and the radiation unit. Effects of major parameters on antenna performance are simulated and studied through electro-magnetic simulation, and the optimal design of the antenna element has been obtained. In addition, binary array based on the quasi-Yagi antenna element is devised to enhance the gain. Prototype antennas according to simulation results have been fabricated and measured. Experimental results show that the antenna element can operate at 2.8-4.5GHz, and the average gain is 5.5dBi. The operating frequency range of the antenna array is 2.9-4.3GHz, and the average gain is 7.5dBi. Both the antenna element and array have advantages of broadband and high-gain, which can be widely used in wireless communication system.