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首页> 外文期刊>The HKIE Transactions >A novel three-dimensional dual-band balun with frequency-independent phase difference and complete ground
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A novel three-dimensional dual-band balun with frequency-independent phase difference and complete ground

机译：具有频率无关的相位差和完全接地的新型三维双波段巴伦

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摘要

A novel three-dimensional (3D) dual-band balun employing the double-sided parallel-strip line (DSPSL) with inherent impedance-transforming capability and complete ground is presented in this paper. The proposed balun is mainly composed of two mutually perpendicular printed circuit boards (PCBs), one of which is a horizontal feeding plane with a slender slot and the other of which is a mounted board vertical to the former. An unbalanced input port and two balanced output ports are totally located at the feeding plane. Utilising the configuration of DSPSL, two different dual-band impedance transformers of two sections are placed in the top and bottom layers of the vertical mounted board respectively. Thus, the transformers are applicable to transform impedances at two frequencies simultaneously. Furthermore, the 180° phase difference is frequency-independent, which facilitates the broadband operation. For verification, two numerical examples with different frequency ratios are designed and simulated, one of which is fabricated on a Rogers 4350B board. Both the simulated and measured results exhibit excellent performance and agree well with each other. In essence, this 3D balun is comprised of a single-layer planar circuit configuration. Consequently, owing to easy integration and low cost, it will be widely applied in the balanced radio frequency components.
机译：本文提出了一种新颖的三维（3D）双频带不平衡变压器，该变压器采用了具有固有阻抗转换能力和完整接地的双面并行带状线（DSPSL）。所提出的平衡-不平衡变换器主要由两个相互垂直的印刷电路板（PCB）组成，其中一个是带有细长插槽的水平进纸平面，另一个是垂直于前者的安装板。一个不平衡的输入端口和两个平衡的输出端口完全位于馈电平面上。利用DSPSL的配置，将两个不同部分的两个不同的双频带阻抗变压器分别放置在垂直安装板的顶层和底层。因此，该变压器适用于同时在两个频率上变换阻抗。此外，180°相位差与频率无关，这有助于宽带操作。为了验证，设计并模拟了两个具有不同频率比的数值示例，其中之一是在Rogers 4350B板上制造的。模拟和测量结果均显示出优异的性能，并且彼此吻合良好。本质上，此3D平衡-不平衡变换器由单层平面电路配置组成。因此，由于易于集成和低成本，它将被广泛地应用于平衡射频组件中。

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