宽频比双频Wilkinson功分器的研究与设计

为了实现双频Wilkinson功分器的宽频比特性,并简化设计结构,在研究奇模-偶模分析理论的基础上,提出了一种在输出端口并联开路微带线的新型结构.首先通过奇模-偶模分析理论得出设计电路的参数方程,接着利用Matlab对推导方程进行求解,获得具体的设计参数,从而设计出宽频比(2.0～6.0)的双频Wilkinson功分器.为了验证设计方法的正确性,仿真并且加工了一个工作在870MHz和2140MHz两个基站频率的功分器.测试结果表明:双频功分器在两个工作频段内都具有良好的性能,测试与仿真结果吻合良好,验证了该方法是可行的.

Study and Design on Dual-Band Wilkinson Power Divider with Wide-Range Frequency Ratio

To achieve wide band-ratio Wilkinson power with simple construction,this paper introduces a new type of structure based on researching of the odd-even mode analysis,which parallels the open-circuit stub at each output port.Firstly,according to the odd-even mode analysis,the equations of the design circuit are obtained.Secondly,using Matlab solves equations to obtain the design parameters to design the Wilkinson power divider with wide-range frequency ratio(2.0～6.0).To verify the proposed design method,a Wilkinson power divider operating at 870/2140MHz base station bands is simulated and fabricated.Measured results show that the designed dual-band power divider has a good performance at the two working bands,and the measurements have a good agreement with the simulation results.It means the design method is feasible.