New Miniaturized Power Divider Technology Research

The power divider is a key component of the RF microwave system,and has an important impact on various indicators of the whole system.In recent years,RF microwave systems are moving toward the trend of miniaturization and lightweight,the traditional Wilkinson power divider can not meet the demand.Therefore,the study of miniaturized,high-performance power divider has a very important significance.Based on the above background,the main research contents and innovation points of this paper are as follows1.In the actual engineering implementation of the traditional Wilkinson power divider,especially in the application of high frequency and high density integration,the parasitic coupling effect of the two transmission lines is difficult to eliminate and makes the performance of the power divider（especially the isolation performance）deteriorate.To address this problem,a miniaturized power divider circuit topology based on parallel coupled lines is proposed.This topology incorporates the parallel line coupling effect into the power divider response synthesis,allowing the proposed power divider to obtain an electrical performance response comparable to that of a conventional Wilkinson power divider.At the same time,capacitive branch loading technique and multi-stage cascading technique are used in the circuit to effectively enhance the miniaturization and bandwidth capability of the power divider.Based on the proposed new miniaturized power divider circuit stage topology,two miniaturized power dividers with center frequency of 10GHz are designed with circuit dimensions of 2.8 mm×4.288 mm（0.093λ₀×0.143λ₀）and 4.8 mm×4.8 mm（0.16λ₀×0.16λ₀）,respectively,to realize the miniaturization of the circuit while ensuring excellent performance.2.In order to further miniaturize the power divider,a miniaturized power divider circuit topology based on the aggregate parameter spiral inductive coupling is proposed.Based on the proposed new miniaturized power divider circuit stage topology,two miniaturized power dividers with center frequency of 1GHz and circuit dimensions of 8 mm×10.5 mm（0.027λ₀×0.035λ₀）and 9.73 mm×10 mm（0.032λ₀×0.033λ₀）are designed,which well realize the circuit miniaturization while ensuring excellent performance.