Novel Frequency Scanning And Multiple Beam Antennas Based On Extraordinary Transmission

With the rapid development of electronic communication and space science, frequency scanning antennas and multiple beam antennas gradually play an important role in the field of military and commercial areas, such as radio communication, radar detection, satellite tracking and so on. Among them, frequency scanning antennas can effectively overcome defects of mechanical scanning antennas and flexibly and rapidly control the direction of radiation beam, which can be used in directional measurement and calibration. Multiple beam antennas are capable of multi-direction tracking and target detection, which are widely used in radar system. Extraordinary transmission can make the electromagnetic wave get rid of traditional transmission structures and fully pass through narrow slots, which has attracted more and more attention by radiation elements, optoelectronics and so on. Therefore, combining the advanced science and technology of extraordinary transmission and designing novel antennas with simple feeds and compact structures are of great significance. In this paper, the works are carried out as follows:1. Traditional frequency scanning antennas and multiple beam antennas are introduced. More specifically, the principle of frequency scanning antennas by arrays and multiple beam antennas by dielectric lens, reflector, and arrays are analyzed and discussed. In addition, the two kinds of antennas mentioned above are realized by using simulation.2. The background and significance of extraordinary transmission are introduced roughly. Later, the extraordinary transmission phenomenon of periodic slot array and its corresponding circuit model for equivalent are also prevented and researched. Then, the structure of split ring resonator is proposed. The band-stop and band-pass transmission characteristic of the split ring resonator and its complementary screen structure are used to verify the Babinet principle. Moreover, the structure of the split ring resonator is configured in front of a small hole to achieve the electromagnetic wave completely transmit through it. The relationship between structure parameters and the working frequency of the split ring resonator is also explored in detail.3. Based on the theory of extraordinary transmission, a new kind of frequency scanning antenna and multiple beam antenna are designed respectively. Through the full wave simulation analysis, the frequency scanning antenna shows that the angle between the main radiation beam and the Z axis are-60, 0 and 30 degree at 9, 10, and 11 GHz respectively. The novel multiple beam antenna also has good performance, whose radiation direction between the main lobes and Z axis are-60 and 60 degree, respectively. What is more, various sharps of radiation structures are proposed to show the influence on multi-beams. In conclusion, the two antennas mentioned above have advantages of small volume, light weight, and good performance, which will have a huge potential prospect in the satellite, aircraft, missiles and other size and weight strictly limited fields.