Design And Implementation Of The Reconfigurable Solid State Plasma Antennas

With the exponential growth in the development of reconfigurable antennas in recent years, people put forward more and more requirements on the performance of antenna. We report on some innovative reconfigurable antennas with solid-state of plasma that are activated by the injection of dc current, which are based the theories of antenna, solid state plasma and semiconductor, the properties of the PIN diodes(including the S-PIN and the vertical structure PIN) have been extensively discussed.The physical characteristics of the S-PIN unit have been discussed, which is the key element of solid-state plasma based on theory and actual process requirements, including S-PIN units under different substrate structures of physical characteristics and physical features of different materials under the same substrate structure. Then a GaAs substrate material S-PIN solid-state plasma pattern reconfigurable antenna array is proposed. The antenna array composed of S-PIN solid-state plasma instead of metal, the basic linear array unit structure is quasi Yagi antenna, The feed of the array antenna can been changed by stimulating different position of S-PIN, so as to achieve radiation pattern reconfigurable. By optimizing the parameters, the antenna array can be switched between the five radiation directions:-45??-20??0??+20?and +45?.According to the requirements of the actual semiconductor process, the PIN unit of the vertical structure based on GaAs is modeled and simulated, its volt ampere characteristics and the variation characteristics of the carriers with the voltage are analyzed. A solid state plasma frequency reconfigurable antenna is proposed, which can change the length of the antenna radiation surface by using the GaAs-PIN element in different position. The antenna can be switched between the three frequency bands including: 2.4GHz?2.78 GHz and 3.07 GHz.We designed An array antenna contains two working states, this antenna array can switch in the 0? and 50? two radiation patterns by using a large number of GaAs-PIN units. Combining the simulation with the actual process, the feasibility of the new antenna is determined through a series of key technical verification. Ultimately, the PCB layout design is fulfilled, and a peripheral control system and the test system of the antenna array is been built. Experimental results and the analyzed of these results are shown in this paper.