Research On Miniaturized Power Distribution / Synthesis Network With High Integration Of Microwave

Microwave power splitter/combiner, referred to as power divider, is one kind of devices which distributes or combines the microwave signal proportionally. Multiple power splitter/combiner comprises the power splitting/combining network, referred to as power splitting network, which is widely used in the system such as radar system, microwave communication and measurement system. It is an important and indispensable device of microwave equipment. Its performance affects the performance of system directly. With the rapid development of wireless communication technology, the modern microwave circuit system is moving towards miniaturization, high integration, high frequency and high performance. As a result, the research of high integration and miniaturization of power splitting network is becoming a hot spot at present.This paper is based on the theory of power divider and power splitting network, using the technologies like low temperature co-firing ceramic (LTCC) technology, the third generation semiconductor material Gallium Nitride (GaN) and substrate integrated waveguide (SIW). Deep research is carried out to the power splitting network of high integration and ministration. The main work is as follows:Firstly, the method of designing unequal power splitting network based on the characteristics of LTCC technology is proposed. By taking advantage of three-dimensional layout ability of LTCC technology, a miniaturized 7-way unequal power splitting network is designed. The performance of the circuit meets the design requirements and the size is about 0.6 λg×0.18λg. Meanwhile, it is verified by tolerance analysis to validate the feasibility of realizing the miniaturized power splitting network by using LTCC technology.Secondly, based on third generation of semiconductor material GaN, a back-to-back passive power splitting network is designed to explore the combining efficiency in millimeter wave band, which provides certain reference for the analysis of the other forms of power combining system.Finally, based on substrate integrated waveguide, a new type of Gysel power divider is designed, which can be used in the high power combining system. To validate the feasibility of the design strategies, the narrowband and broadband type of Gysel power divider are designed. The measurement results agree with the simulations.In this paper, from three aspects of technology, materials and structure, the design of power splitting network with features of miniaturization and high integration is investigated and discussed. These research works in this thesis for different circuit structure and different ways of technology of power splitting/combining network can provide certain technical reference for the relevant circuits and systems.