Radar Basic Performance Research With Plasma Reflector Antenna

Plasma antenna, compared with the traditional metal antenna, has many unique advantages. So it has attracted wide attention from domestic and foreign electronic countermeasures, radar stealth, radar and antenna design and other related field experts. Radar with plasma reflector antenna is a kind of new electronically-scanned radar with high performance. Analysis and research of this new type of radar performance has important practical significance. This thesis studies the plasma reflector for radar applications, combined with the current status of the plasma antenna and the research results of phased array radar at home and abroad. Main work and results are as follows:(1) The simulation for interaction between electromagnetic wave and plane plasma is performed. Based on experiments and relevant literature, the paper studies plasma characteristic on stability, flatness, noise radiation, microwave power handling capability, and switching time. The results demonstrate that plasma plane is a good reflector antenna for radar application.(2) Based on the characteristic of the plasma plane, the paper presents a kind of monopulse radar design method, and discusses its performance. The monopulse technique with the plasma reflector can achieve the ability of electronically scanned to tracking multi-target in wide-angle area. Compared with phased array radar, it scans scope wider, the accuracy is higher, designing is simpler. Further, through the establishment of two kinds of electronically scanned radar model to compare results show that the radar with plasma reflector antenna tracking accuracy required in ensuring at the same time, more to save system resources.(3) Based on plasma reflector radar model, several key problems in electronically scanned radar tracking algorithms are studied thoroughly. To consider radar parameter control An adaptive parameter control method based on Interacting Multiple Model (IMM) algorithm is presented .With cooperative control of sampling interval and dwell time, the method is practical and effective; In the nonlinear filtering algorithms, A new augmented interacting multiple model technique based on unscented transformation is developed. Analysis shows that the approach possesses better stability, and can economize radar resource more efficiently. An enhanced multiple model particle filter is also proposed. The new algorithm enables the user to control the number of particles in a certain mode flexibly without interaction between particles of different mode. So it can achieve better performance with fewer particles. In addition, this paper presents an improved multiple hypothesis tracking method, and applies it to electronically scanned radar. Analysis shows that the algorithm is not sensitive to the false alarm probability within a certain range.(4) In the light of dynamic system workload in electronic scanning radars, novel task models are built for various dwell requests, and an adaptive scheduling algorithm is presented. The new adaptive scheduling mechanisms can analyze the schedulability of tasks when their timing constraints and energy constraints are taken into account. Especially with regard to the plasma characteristics of large power handling capability, the dwell model is simplified, and integrated priori is introduced. The scheduling performance of radars with plasma reflector is significantly increased.The work of this thesis may be contribute to the further development of the electronically-scanned radars, and may be offer some reference for the design of future radar system with plasma reflector.