| With the rapid development of information technology, the existing band have been unsatisfied by person. In the dissertation, this paper made two aspects of the work. Firstly, expanding new bands by designing antennas in the60GHz band,since the60GHz band antenna has a large loss for the airborne transmission, high efficiency and high gain is a must for this communications. The antenna array based micro-machine and mechanical loading can achieve this goal. Secondly, in order to improve the current band utilization, the OAM antenna is emerged, which enables to realize transmission of multiple information within a frequency band, thus greatly improving the utilization of the current band. The detailed contents and innovational work are summarized as followings:The first design is a micro-strip patch antenna in PCB medium, the operating band of the antenna is56GHz-65GHz, which meets the current band requirement, the antenna gain is5.8dBi. Then, based on microcoaxial process, a60GHz array antenna using T-splitters feeding network is designed, the antenna’s operating band is56.8-64.8GHz and gain is10.6dBi.The second is loading technology research for60GHz antenna.Based on the original micro-strip patch antenna, two different models of loading structures are designed, one is DR(Dielectric Resonator) loading, another one is AMC (Artificial Magnetic Conductor) loading. The both can improve the gain of the antenna. the DR is loaded in the top of the antenna, after loading the gain improve to9dBi, AMC is loaded in the bottom of the antenna, the gain improves to8.6dBi.The third is reflector loading for60GHz antenna.Designing electrically large reflector loading.one is a flat reflector structure, the structure size is67.5mm×67.5mm×2mm, the initial feed is micro-strip patch antenna, the gain after loading reaches19.9dBi; the other is a hyperboloid reflector, the main reflector has a diameter of150mm,and the sub-reflector is25mm.The reflector is feed by a2x8array of micro-strip patch antennas, the gain after loading reaches32dBi.The last design is a OAM antenna.Designing a simple circular arrays which can produce spiral electromagnetic waves, the antenna is composed of four elements of dipole antenna around a circular, simulation results show that the arrays can generate a spiral electromagnetic waves, and to some extent, the distance can be increased to increase electromagnetic. |
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