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An Ultraminiaturized Bandpass Filtering Marchand Balun Chip With Spiral Coupled Lines Based on GaAs Integrated Passive Device Technology
IEEE Transactions on Plasma Science ( IF 1.5 ) Pub Date : 2020-09-01 , DOI: 10.1109/tps.2020.3019308
Yuhao Yang , Yongle Wu , Zheng Zhuang , Mengdan Kong , Weimin Wang , Cong Wang

The integrated passive device (IPD) technology has become a new research hotspot, and it depends on electrical characteristics of GaAs, NiCr, and Si3N4 to construct radio frequency (RF) components. RF elements constructed by the IPD technology have features of high quality and ultra-small size, especially for capacitors and inductors. In order to realize the miniaturization of RF circuits, dimensions become as small as possible. Consequently, the layout of a spiral coupled line (SCL) cannot be drawn freely, so that it has uncontrollable odd- and even-mode impedances and a large coupling coefficient, which may limit the design of the traditional Marchand balun negatively. This article solves this problem by designing a GaAs IPD Marchand balun with 1/8-wavelength coupled lines (CLs) and using a capacitor termination to replace the open end in the conventional Marchand balun. Meanwhile, a filter is added to realize a filtering function. The proposed bandpass filtering Marchand balun (BFMB) chip has a size of 1.49 mm $\times1.39$ mm, and measured results indicate that it has an operation band of 2.39–5.68 GHz with a phase imbalance of 5.26° and a magnitude imbalance of less than 0.35 dB.

中文翻译:

一种基于GaAs集成无源器件技术的螺旋耦合线超小型化带通滤波马尔尚巴伦芯片

集成无源器件(IPD)技术成为新的研究热点,它依靠GaAs、NiCr和Si3N4的电气特性来构建射频(RF)元件。采用IPD技术构建的射频元件具有高质量和超小尺寸的特点,尤其是电容和电感。为了实现射频电路的小型化,尺寸尽可能地小。因此,螺旋耦合线(SCL)的布局不能自由绘制,奇偶模阻抗不可控,耦合系数大,这可能会对传统马尔尚巴伦的设计产生负面限制。本文通过设计具有 1/8 波长耦合线 (CL) 的 GaAs IPD 马尔尚巴伦并使用电容器端接替换传统马尔尚巴伦中的开路端来解决此问题。同时,增加一个过滤器来实现过滤功能。所提出的带通滤波马尔尚巴伦 (BFMB) 芯片尺寸为 1.49 mm $\times1.39 $ mm,测量结果表明其工作频带为 2.39–5.68 GHz,相位失衡为 5.26°,幅度失衡小于 0.35 分贝。
更新日期:2020-09-01
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