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首页> 外文会议>2013 International Conference on QiR >Bandwidth enhancement of ultra-wideband microstrip bandpass filter using defected ground structure
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Bandwidth enhancement of ultra-wideband microstrip bandpass filter using defected ground structure

机译：利用缺陷接地结构增强超宽带微带通滤波器的带宽

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摘要

In this paper, the bandwidth enhancement of ultra-wideband (UWB) microstrip bandpass filter (BPF) is proposed by utilizing defected ground structure (DGS). The initial UWB microstrip BPF which is designed to have the bandwidth response of 4GHz with the center frequency of 4GHz is deployed on FR4 Epoxy dielectric substrate with overall size and thickness of 11mm × 32mm and 0.8mm respectively. To enhance the bandwidth response, an attempt is carried out by applying DGS on to the ground plane of initial filter. Here, the proposed DGS is constructed of 3 circular dumbbells. Some parametrical studies to the DGS such as changing the radius of dumbbells and the dimension of bridging-section of dumbbells are conducted intensively to obtain the optimum geometry of DGS with the desired bandwidth response. From the characterization result, it shows that the utilization of DGS on to the ground plane of filter has widened 3dB bandwidth response up to 5.36GHz ranges from 1.84GHz to 7.2GHz yielding an enhanced ultra-wideband response for various UWB applications. The minimum insertion loss and maximum return loss of microstrip BPF with proposed DGS in the passband area are 2.05dB and 6.73dB, respectively.
机译：本文提出了利用缺陷接地结构（DGS）来提高超宽带（UWB）微带通滤波器（BPF）的带宽的方法。最初的UWB微带BPF设计为在中心频率为4GHz时具有4GHz的带宽响应，并部署在FR4环氧树脂电介质基板上，其总尺寸和厚度分别为11mm×32mm和0.8mm。为了增强带宽响应，尝试通过将DGS应用于初始滤波器的接地层来进行尝试。在这里，建议的DGS由3个圆形哑铃构成。对DGS进行了一些参数研究，例如改变哑铃的半径和哑铃的桥接部分的尺寸，以获得具有所需带宽响应的DGS的最佳几何形状。从表征结果可以看出，在滤波器的接地层上利用DGS已将3dB带宽响应扩展到了1.36GHz至7.2GHz的5.36GHz范围，从而为各种UWB应用提供了增强的超宽带响应。拟议DGS的微带BPF在通带区域的最小插入损耗和最大回波损耗分别为2.05dB和6.73dB。

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