Design and analysis of X-band cavity magnetron

Cavity magnetron as a high power microwave source has been around since the Second World War. It is mostly used in radars and communication satellites. Even though the theory of magnetron has been around for a long time, there is no straightforward design method to follow. Usually iterative techniques have been used and particle simulators are the first choice in the study and design of cavity magnetrons. In recent years, although MAGIC is very popular program, in this thesis, CST Particle Studio is used.In a magnetron design, it is very important to start with accurately calculated parameters to ensure convergence to desired results and develop the design in a relatively short time. For this reason, a design method is derived and explained in detail in this thesis. The resulting expressions are used in the design of X band magnetron. Using eigenmode, tracking and PIC solver parts of CST Particle Studio, 3D computer model is formed and the effects of all primary design parameters are examined. In addition, simulations run with different program parameters to study the effects of modeling parameters on designed model.Another important phenomenon in magnetron design is its noise. The noise generating mechanism has not been understood completely even though many studies have been devoted to this subject. On the other hand, the various experiments have been performed to reveal primary noise sources of a magnetron. According to these works, there exist several noise reduction techniques. These methods are separately modeled using CST Particle Studio and best noise reduction technique is chosen for particular magnetron geometry.Thus, the contribution of this thesis is two-fold. First, the design of an X band cavity magnetron is detailed and the impacts of design parameters on the performance of an X-band magnetron are investigated. Then, the sources of noise in a magnetron are studied and noise reduction mechanisms are proposed and implemented on an eight hole-slot type cavity magnetron.