倒置微带间隙波导共面EBG滤波器用于天线应用
Inverted Microstrip Gap Waveguide Coplanar EBG Filter for Antenna Applications
AI总结：
本研究提出倒置微带间隙波导共面EBG滤波器，通过蘑菇型元件实现紧凑阻带，X波段5单元滤波器达到-35.4 dB抑制和低损耗，适用于天线馈电网络集成。
摘要：
本研究探讨了在倒置微带间隙波导技术中利用共面耦合EBG谐振器制作紧凑型阻带滤波器的可能性。为此，展示了不同蘑菇型元件配置的滤波特性，其中短路元件放置在贴片谐振器的边缘。文中阐述了该结构的性能及其主要优点，如低损耗、自封装、低复杂度、灵活性和易于设计。为评估将这些结构集成到间隙波导平面天线馈电网络中的可能性，设计并制作了一个X波段的5单元EBG滤波器。该滤波器实现了最大抑制电平为-35.4 dB，阻带中心频率为9 GHz，相对分数带宽（低于-20 dB）为10.6%。新型紧凑滤波器呈现平坦通带，匹配良好，插入损耗低，包括连接器在内，在大部分频带内接近1.5 dB。这些结果足以改善该技术中未来低复杂度天线设计的滤波功能。
英文摘要：
The possibility of making compact stopband filters using coplanar-coupled EBG resonators in inverted microstrip gap waveguide technology is studied in this work. To do this, the filtering characteristics of different configurations of mushroom-type elements are shown in which the short-circuit element is placed on the edge of the resonator of the patch. The behavior of the structure as well as its main advantages such as: low losses, self-packaging, low level of complexity, flexibility and easy design are illustrated in the paper. To evaluate the possibility of integrating these structures in gap waveguide planar antennas feeding networks, a 5-cell EBG filter was designed and built at the X band. The proposed filter reached a maximum rejection level of minus 35.4 dB, had a stopband centered at 9 GHz and a relative fractional bandwidth below minus 20 dB of 10.6 percent. The new compact filter presented a flat passband in which it was well matched and had low insertion losses that, including the connectors, were close to 1.5 dB in most of the band. These results are enough to improve low-complexity future antenna designs with filter functionalities in this technology.
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