Research On The Key Technologies Of Multi-Frequency Antenna And Reconfigurable Antenna Based On MEMS

The work of this dissertation is supported by the eleventh-five microelectronics advance research project and the Compass GNSS fund by ME. The work concentrates on several hot antenna design issues, such as multi-frequency, miniaturization and reconfiguration and analyses key technologies and gives relevant simulation results. In the part of reconfigurable antenna research, the author explores the mechanism of frequency reconfiguration and pattern reconfiguration, and proposes a frequency reconfiguration oriented microstrip nested simulation model. Utilizing antenna array principle and electromagnetic coupling between antenna elements, pattern reconfiguration is also implemented in theory and simulation. In the part of satellite navigation receiving antenna research, the author proposes a kind of half wave structure, a palisade gap structure and a branch structure to realize the miniaturization and multi-frequency of the receiving antenna in theory and simulation.The main innovations of the dissertation include the following aspects.1. The author proposes a new kind of frequency reconfiguration oriented nested patch structure and the design method, and designs antenna simulation models. The structure is convenient to design, and has strong adaptability to mutual coupling effects between metal patches on the antenna resonance frequency by adjusting the patch size. Meanwhile, the similarity of the nested patch can overcome the direction change due to the frequency switching. The designed double rectangle nested antenna simulation model is10mm×10mm and can work at35.0GHz and28.1GHz according to the simulation result while the bandwidth is3.2GHz and0.8GHz, respectively. The antenna can be used for signal channel expand and hop communication.2. The author proposes a new kind of pattern reconfiguration oriented parasitic guided patch structure and the design method that can enhance the pattern angle offset effect, and proposes relevant antenna simulation models. The main principle is to use mutual coupling effect between the antenna patches and arrange parasitic patches along the E-plane and H-plane to couple signals from the main feed to produce radiation field. The radiation field composes with the main radiation field so that the far-field radiation angle will be deflected and pattern reconstruction is achieved according to simulation result. This method is similar to a micro-array antenna structure, but compared with the traditional array antenna, the new structure has the advantages of small size, light weight and integration.3. Proposing a new kind of half wave and palisade gap structure and realizing the multi-frequency and miniaturization of satellite navigation receiving antenna in theory and simualtion.The design introduces half wave shortcut surface to the electric field zero line in the middle of the antenna patch in order to form a standing wave distribution from the open end to the short end, thus the antenna size can be reduced. Meanwhile, close to the non-radiating edge of the patch a straight slot is inserted, so that the antenna surface currents can be effectively bend and the effect path will be increased to reduce the size of the antenna. The slot also radiates, so new operating frequency is added to the original working frequency and therefore dual band radiation is realized in theory according to simulation results.The dissertation summaries the theory and simulation results and achivements and puts forward some suggestions for the future study.