Design of a Miniaturized 2.4GHz Directional Antenna

With the rapid development of communication technology, people's demand for wireless communication field is increasing, and various kinds of antenna with radiation characteristics are emerging. Four arm helical antenna is widely used because of its simple structure, circular polarization, wide beam and other advantages. In this paper, based on the in-depth analysis of the four arm helical antenna, a miniaturized four arm helical antenna applied to 2.4GHz is proposed. It uses the microstrip ring network to feed, realizes the precise control of the phase of the four spiral arms of the antenna, and uses teflon as the antenna support to reduce the antenna volume. The simulation results show that the antenna has a good axial ratio and a wide beam coverage. The test results show that the antenna has a 0.4db gain and a good standing wave ratio.