Novel Defected Ground Structure and Two-Side Loading Scheme for Miniaturized Dual-Band SIW Bandpass Filter Designs
Novel Defected Ground Structure and Two-Side Loading Scheme for Miniaturized Dual-Band SIW Bandpass Filter Designs
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DOI：
10.1109/lmwc.2015.2400916
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发表时间：
2015-02
影响因子：
3
通讯作者：
Shanshan Xu;Kaixue Ma;F. Meng;K. Yeo
中科院分区：
文献类型：
--
作者：
Shanshan Xu;Kaixue Ma;F. Meng;K. Yeo
报道了一种新颖的背靠背E形缺陷接地结构（DGS）和双面加载方案，用于小型化双频基片集成波导（SIW）带通滤波器（BPF）的设计。新型DGS加载的基片集成波导在基片集成波导的截止频率以下支持倏逝模波的传播，同时在通带内实现了两个传输极点和两个可控传输零点。在此基础上，提出了在基片集成波导两侧加载不同尺寸的DGS谐振器的加载方案。为了验证设计和分析，2.4/5.2 GHz的滤波器原型设计。在良好的协议与理论结果，测量结果的双频滤波器实现插入损耗为3.6和3.1 dB，和5.8%和6.45%的分数带宽在2.4和5.2 GHz，分别。滤波器尺寸仅为408 mil × 420 mil。
This letter reports a novel back-to-back E-shaped defected ground structure (DGS) and two-side loading scheme for miniaturized dual-band substrate integrated waveguide (SIW) bandpass filter (BPF) designs. The SIW loaded by novel DGS supports evanescent-mode wave propagation below the cut-off frequency of SIW, while achieves two transmission poles at the passband and two controllable transmission zero points. Furthermore, the novel loading scheme by loading different-sized DGS resonators on two sides of SIW is proposed for dual-band BPF designs. To validate the design and analysis, a 2.4/5.2 GHz filter prototype was designed. In good agreement with theoretical results, the measured results of the dual-band filter achieve insertion losses of 3.6 and 3.1 dB, and fractional bandwidths of 5.8% and 6.45% at 2.4 and 5.2 GHz, respectively. The filter size is only 408 mil × 420 mil.