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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Two-GHz hybrid coaxial bandpass filter fabricated by stereolithography 3-D printing
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Two-GHz hybrid coaxial bandpass filter fabricated by stereolithography 3-D printing

机译：由立体光刻3-D印刷制造的双GHz混合同轴带通滤波器

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摘要

This brief presents a fourth-order hybrid coaxial bandpass filter, which is fabricatedusing Stereolithography 3-D printing. The filter is designed to operate ata center frequency of 2 GHz, with a bandwidth of 40 MHz, a Chebyshevresponse and two symmetrical transmission zeros at 1.96 GHz and 2.04 GHz toachieve a better frequency selectivity. Usually in coaxial cavity filter design,the main-line couplings and cross couplings are realized using coupling irisesor probes. However, in the filter presented here, the main-line couplingsbetween coaxial resonators and input/output coupling are realized usingPrinted Circuit Board (PCB) lines instead. This novel idea allows differenttopologies to be designed easily by altering the PCB layout. It also allows multiplecross couplings to be included in the PCB layout for different filter topologies.In addition, the quality factor of each of the coaxial resonators in thefilter is increased by introducing base rounding in the resonator. The filter wastested, and the measurement result of the filter shows very good agreementwith simulated result without tuning, which indicates the accuracy of the fabricationprocess.
机译：本简要介绍了第四阶混合同轴带通滤波器，其制造使用立体光刻3-D印刷。过滤器旨在运行2 GHz的中心频率，带宽40 MHz，一个Chebyshev响应和两个对称传输零，1.96 GHz和2.04 GHz到实现更好的频率选择性。通常在同轴腔滤波器设计中，使用耦合虹膜实现主线路耦合和交叉耦合或探针。但是，在这里呈现的过滤器中，主线路联轴器使用的同轴谐振器和输入/输出耦合使用印刷电路板（PCB）线路代替。这部小说允许不同通过改变PCB布局轻松设计的拓扑。它还允许多个包含在PCB布局中的交叉耦合以进行不同的过滤器拓扑。此外，每个同轴谐振器的质量因子通过在谐振器中引入基础圆形来增加滤波器。过滤器是测试，滤波器的测量结果显示了非常好的协议使用模拟结果而无需调整，这表明了制造的准确性过程。

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