A Self-Packaged Ultra-Wide Band Bandpass Filter Using Integrated Substrate Gap Waveguide
A Self-Packaged Ultra-Wide Band Bandpass Filter Using Integrated Substrate Gap Waveguide
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DOI：
10.1109/ieee-iws.2019.8804146
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发表时间：
2019-05
期刊：
影响因子：
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通讯作者：
Zhidong Ruan;Dongya Shen;Hong Yuan;Xiupu Zhang
中科院分区：
文献类型：
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作者：
Zhidong Ruan;Dongya Shen;Hong Yuan;Xiupu Zhang
提出了一种基于集成基片间隙波导（ISGW）技术的超宽带带通（UWB）滤波器，该滤波器具有超宽带和高选择性。超宽带ISGW带通滤波器结构由三层介质基板组成，顶层基板采用金属通孔和金属贴片实现完美磁导体（PMC）结构，适用于封装基片集成波导（SIW）滤波器，避免外部干扰和辐射损耗以及内部辐射泄漏，中间层基板提供稳定的间隙层，和金属通孔，在金属平面上刻蚀缝隙，在层中间放置金属通孔，得到基片集成波导滤波器，即自封装超宽带ISGW滤波器。以中心频率为17.5 GHz的滤波器为例进行了制作和测试。测量结果表明，该滤波器的通带为14.4 ~ 20.7GHz，即滤波器的分数带宽（FBW）为36%，插入损耗为0.91dB。更重要的是，得益于ISGW，在12.9和22.1 GHz处获得了两个传输零点，以提高高选择性。
An ultra-wideband bandpass (UWB) filter using integrated substrate gap waveguide (ISGW) technology is proposed, which has ultra-wideband and high selectivity. The UWB ISGW bandpass filter structure consists of three layer dielectric substrates, the top substrate uses metallic via-holes and metallic patches to implement perfect magnetic conductor (PMC) structure, which is suitable for packaging substrate integrated waveguide (SIW) filters to avoid external interference and loss caused by radiation and internal radiation leakage, the middle layer substrate provides a stable gap layer, and the base substrate is used to obtain a SIW filter by etching the slots in the metal plane and placing metallic via-holes in the middle of the layer, i.e. a self-packaged UWB ISGW filter. The proposed filter was fabricated and tested at a center frequency of 17.5 GHz as an example. The measurements show that the filter has a passband from 14.4 to 20.7 GHz, i.e. This filter has a fractional bandwidth (FBW) of 36%, and an insertion loss of 0.91 dB. More importantly, thanks to ISGW, two transmission zeros are obtained at 12.9 and 22.1 GHz to improve high selectivity.