Research And Design Of Dual Frequency Wilkinson Power Divider Based On Ring Structure

As an important part of the RF front-end,the power divider(power divider)plays an unparalleled key role in today's RF microwave circuits.With the continuous progress of science and technology,the development of wireless communication technology also makes great strides forward,which leads to the increasing requirements for power dividers.Among them,multi-band,high performance,small size,low cost,requirements such as integration are particularly prominent.Based on the above research background,this paper proposes a Wilkinson power divider based on a single ring structure to achieve dual frequency points.The main work content is summarized as follows:First of all,we summarize the performance,function,advantages and disadvantages and research status of various power dividers that have been proposed.The key to the design: impedance matching network and isolation resistance is summarized.The development of a single ring structure in microwave passives such as power dividers,filters,and impedance converters is summarized,and its advantages and disadvantages are explained.Based on the above viewpoints,it is proposed that the ring structure can be used to design an impedance matching network and then realize the Wilkinson power divider with dual frequency points.This article proposes two circuit structures,one is to use a single ring structure to achieve the function of dual frequency points,on this basis,the subsequent use of coupled lines to reduce the circuit size.In the design process,we have carried out theoretical analysis and modeling simulation of the two proposed circuit structures,and the final experimental results have proved the feasibility of the proposed method.Secondly,we propose a dual-band Wilkinson power divider based on a single ring structure.The two frequency points of the power divider are 3GHz and 6.6GHz respectively.In the overall design process,the addition of the ring structure leads to the appearance of dual frequency points,and the addition of the ring structure makes the traditional isolation resistor placement method unable to achieve isolation in the circuit,so we finally chose to the isolation resistor is placed between the two characteristic impedances to achieve the isolation effect,while reducing the overall size of the circuit.Finally,a comparison between the theoretical simulation results of the power divider and the experimental simulation results is given.The comparison results show that the experimental results are similar to the theoretical results,which proves our design.Finally,on the basis of the previous power divider design,because the upper and lower ring structures are relatively close,a certain amount of coupling will occur.Therefore,we further propose to add a coupling line on the basis of the ring structure to realize the function of dual frequency points.In the process of theoretical analysis,we discussed the situation of one isolation resistance and two isolation resistances,and finally selected one isolation resistance for theoretical simulation and electromagnetic field simulation.The final design of the circuit can still achieve the dual frequency point function.The final experimental results prove the feasibility of the proposed theory,but there are still some areas that are not perfect in theoretical analysis and modeling and simulation,and further research is needed in the follow-up work.