论文标题
Terahertz Planar-goubau-line过滤器的电容耦合谐振器
Capacitively-coupled resonators for terahertz planar-Goubau-line filters
论文作者
论文摘要
低损坏的平面Goubau线显示了Terahertz应用的有希望的潜力。但是，单线波导表现出的设计自由度少于标准多导动器线，这是实现标准组件的重大限制。平面Goubau线的现有过滤器缺乏明确的设计程序，无法综合任意过滤器响应。在这项工作中，我们通过定期用电容耦合的λ/2谐振器来定期加载线路，为平面Goubau线的带通/带挡滤波器滤波器提供设计，可以通过更改其电气长度来轻松调谐。过滤器的工作原理由提议的传输线模型解释。我们设计并制造了一个以0.9 THz为中心的Pass带滤波器在10μm硅膜底物上，并比较了0.5 THz至1.1 THz之间的测量结果与电磁模拟，在S11和S21中都显示出极好的一致性。测得的通带插入损失为7 dB，3DB带宽为31％。总体而言，提出的过滤器设计具有良好的性能，同时具有简单的设计过程。
Low-loss planar Goubau lines show promising potential for terahertz applications. However, a single-wire waveguide exhibits less design freedom than standard multi-conductor lines, which is a significant constraint for realizing standard components. Existing filters for planar Goubau line lack clear design procedures preventing the synthesis of an arbitrary filter response. In this work, we present a design for a bandpass/bandstop filter for planar Goubau line by periodically loading the line with capacitively coupled λ/2 resonators, which can be easily tuned by changing their electrical length. The filter's working principle is explained by a proposed transmission-line model. We designed and fabricated a passband filter centered at 0.9 THz on a 10-μm silicon-membrane substrate and compared measurement results between 0.5 THz and 1.1 THz to electromagnetic simulations, showing excellent agreement in both S11 and S21. The measured passband has an insertion loss of 7 dB and a 3-dB bandwidth of 31 %. Overall, the proposed filter design has good performance while having a simple design procedure.
