Substrate Integrated Folded Waveguide Filter with Out-of-Band Rejection Controlled by Resonant-Mode Suppression
Substrate Integrated Folded Waveguide Filter with Out-of-Band Rejection Controlled by Resonant-Mode Suppression
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DOI：
10.1109/lmwc.2015.2400927
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发表时间：
2015-02
影响因子：
3
通讯作者：
R. Moro;S. Moscato;M. Bozzi;L. Perregrini
中科院分区：
文献类型：
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作者：
R. Moro;S. Moscato;M. Bozzi;L. Perregrini
这封信介绍了一种基于基板集成折叠波导（SIFW）技术的新型滤波器，该滤波器具有紧凑的尺寸和良好的带外抑制能力。该滤波器基于 SIFW 腔，可保证尺寸减小，带外抑制通过高阶腔模的抑制和调谐来控制。对腔模谱进行了详细研究，以说明滤波器的工作原理和设计。该滤波器的有趣特征是可以通过简单地调谐腔的模式谱来设计通带和返回带，这实际上不受与激励端口的连接的影响。工作频率为 4.5 GHz 的原型的制造和测试验证了所提出的滤波器拓扑结构。
This letter presents a new filter, based on substrate integrated folded waveguide (SIFW) technology, which exhibits compact size and good out-of-band rejection. The filter is based on a SIFW cavity, which guarantees size reduction, and the out-of-band rejection is controlled by the suppression and tuning of the high-order cavity modes. A detailed investigation of the cavity mode spectrum is presented, to illustrate the operation principle and the design of the filter. The interesting feature of this filter is the possibility to design the pass band and the return band by simply tuning the mode spectrum of the cavity, which is practically unaffected by the connection to the excitation ports. The fabrication and testing of a prototype operating at 4.5 GHz validate the proposed filter topology.