Broadband Printed-Circuit-Board Characterization Using Multimode Substrate-Integrated- Waveguide Resonator
Broadband Printed-Circuit-Board Characterization Using Multimode Substrate-Integrated- Waveguide Resonator
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DOI：
10.1109/tmtt.2017.2650232
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发表时间：
2017-01
影响因子：
4.3
通讯作者：
H. Wang;Y. Cheng
中科院分区：
文献类型：
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作者：
H. Wang;Y. Cheng
本文提出并研究了利用多模基片集成波导（SIW）谐振器进行宽带印刷电路板特性的方法。谐振腔样品由两个封闭的矩形波导通过位于腔两端的两个耦合槽馈电。在谐振腔中可以依次激发出一系列具有大模指数的TE ${10}{k}}$谐振模。该设计能够对两个相邻模式之间的频率间隔（$\Delta f$）进行有效控制。此外，$\Delta f$接近于具有大模指数$k$的常数。这一特性对于在小且近似均匀的频率间隔下测试介电材料非常重要。给出了具体的设计过程，针对给定的工作频段，综合了谐振器样品和馈电结构的尺寸。以Taconic TLY-5基片为例，首先在$Ka$波段进行了测量，验证了该方法的准确性。制作了两种不同厚度的样品，并进行了测试，以校准导体损耗。之后，这种基片集成波导多模测量被用来准确地测试相同的基板在整个$W$ -波段与近似均匀的频率间隔。由于谐振模式的选择和辐射泄漏，传统的基于微带线的谐振方法无法实现这一任务。
Broadband printed-circuit-board characterization using a multimode substrate-integrated-waveguide (SIW) resonator is proposed and investigated in this paper. The resonator sample is fed by two closed rectangular waveguides through two coupling slots positioned at two ends of the cavity. A series of TE $_{\mathrm {10}{k}}$ resonant modes with large mode index can be excited sequentially in the cavity. This design is able to perform an effective control of the frequency interval ( $\Delta f$ ) between two neighboring modes. Besides, $\Delta f$ approaches to be a constant with a large mode index $k$ . This feature is important to test dielectric materials at small and approximately uniform frequency intervals. The detailed design process is introduced to synthesize the dimensions of the resonator sample and the feeding structure for a given operation frequency band. As an example, the Taconic TLY-5 substrate is measured at $Ka$ -band firstly to validate the accuracy of this method. Two types of samples with different thicknesses are fabricated and tested to calibrate the conductor loss. After that, this SIW multimode measurement is employed to accurately test the same substrates over the whole $W$ -band with approximately uniform frequency intervals. This task cannot be implemented by conventional resonance methods based on microstrip lines because of the selection of resonant modes and the radiation leakage.