Sixteenth‐mode substrate integrated waveguide cavity filters
Sixteenth‐mode substrate integrated waveguide cavity filters
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DOI：
10.1002/mmce.21603
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发表时间：
2018-11
期刊：
影响因子：
--
通讯作者：
A. Azad;A. Mohan
中科院分区：
文献类型：
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作者：
A. Azad;A. Mohan
本文提出了一种工作在基模TM010的带通滤波器，它采用16模基片集成波导（SMSIW）谐振腔。第一个滤波器是单层四阶带通滤波器，具有紧凑的尺寸，良好的选择性和高达2.25f0的宽阻带。由于高阶模TM 020产生的通带的存在，阻带抑制受到限制。为了进一步减小滤波器的尺寸并改善其阻带特性，提出了一种多层结构。第二个滤波器是一个多层二阶带通滤波器，其中两个腔通过在腔的接地平面上蚀刻的圆弧形槽耦合。调整槽的位置和尺寸以获得TM010和TM020模式的期望耦合。通带由TM 010模产生，其带宽可以通过实现所需的TM 010耦合来控制。此外，通过最小化TM 020模式的耦合来抑制由TM 020模式构成的通带，并且获得了比第一滤波器更宽的高达3.14f0的阻带。所提出的滤波器具有尺寸紧凑、低损耗和宽阻带性能的优点。对滤波器进行了设计、制作和测试。仿真和测量结果表明，可以接受的协议。
This paper presents bandpass filters using sixteenth‐mode substrate integrated waveguide (SMSIW) cavities operating at fundamental mode TM010. The first filter is a single‐layer fourth‐order bandpass filter which exhibits compact size, good selectivity and wide‐stopband up to 2.25f0. The stopband rejection is restricted due to the presence of the passband generated by the higher‐order mode TM020. To further reduce the size and improve the stopband characteristic of the filter, a multilayer configuration is proposed. The second filter is a multilayer second‐order bandpass filter in which the two cavities are coupled through a circular arc‐shaped slot etched on the ground plane of the cavities. The position and the dimensions of the slot are adjusted to obtain the desired couplings of TM010 and TM020 modes. The passband is created by TM010 mode, and its bandwidth can be controlled by realizing the desired TM010 coupling. Moreover, the passband constituted by TM020 mode is suppressed by minimizing the coupling of TM020 mode, and a stopband up to 3.14f0 is obtained which is wider than that of the first filter. The proposed filters have the advantages of compact size, low loss, and wide‐stopband performance. The filters are designed, fabricated and measured. The simulation and measurement results show an acceptable agreement.