一种新型的毫米波段高隔离度平面功分器

A novel millimeter wave planar power divider with high isolation

提出了一种新颖的平面功分器结构。该功分器基于Wilkinson功分器进行改进设计,采用缺陷地结构,通过微带-槽线过渡和环状吸收槽线提高端口间隔离度。该结构解决了毫米波段尤其是W波段因功分器结构尺寸小、无法加入隔离电阻而导致端口间隔离度恶化的问题。使用HFSS软件进行仿真设计,端口间隔离度优于21 dB,相比常规Wilkinson功分器提高约14 dB。对样件的实测结果表明,该模型输出端口间隔离度大于15 dB,端口回波损耗优于20 dB,输出端口具有良好的幅度和相位平衡性。

A novel planar power divider is proposed. The power divider is improved and designed based on the Wilkinson power divider, and it adopts the Defected Ground Structure (DGS) to im- prove the isolation between the ports through the microstrip/ slot-line transition and annular absorption slot line. The structure solves the problem that the isolation between the ports is deteriora- ted due to the small size of the power divider and the inability to add the isolation resistor for the millimeter wave band, especially W band. The HFSS simulation results show that the isolation be- tween the ports is better than 21 dB, which is about 14 dB higher than the conventional Wilkinson power divider. The test results show that the isolation between the output ports of the model is better than 15 dB, the port echo loss is better than 20 dB, and the amplitude and phase balance are excel- lent between the output ports.