UGCPW Structure-Based Embedded Resonator with High Quality Factor for Microwave Substrate Characterization
UGCPW Structure-Based Embedded Resonator with High Quality Factor for Microwave Substrate Characterization
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基于 UGCPW 结构的具有高品质因数的嵌入式谐振器，用于微波基底表征
DOI：
10.3390/electronics10020113
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发表时间：
2021-01-01
期刊：
影响因子：
2.9
通讯作者：
Cai, Longzhu
中科院分区：
文献类型：
--
作者：
Cai, Longzhu
提出了一种基于非接地共面波导的嵌入式谐振腔微波基片特性的表征方法。由测量的谐振频率可以计算出结构的有效介电常数和微波基片的介电常数。在谐振频率和3 dB带宽下测得的插入损耗可用于确定有载和无载品质因数，包括与介电损耗角正切相关的介电品质因数。为了提高提取精度，考虑了辐射损耗和开口结构引起的边缘效应引起的额外长度。实验结果表明，该谐振器在谐振阶数为1时的无载品质因数达到211.3。Taconic TLY在谐振阶数1处的提取介电常数和介电损耗角正切分别为2.218和9.286×10−4，分别与介电常数值仅相差0.018（相对0.82%）和0.286×10−4（相对3.18%）。所提出的谐振器方法是特别适合的介电特性的新开发的材料，实现金属通孔的困难，在这种情况下，基板集成波导（SIW）谐振器的方法是不适用的。与微带谐振器方法相比，该方法具有更高的品质因数，更可靠，更经济。
In this paper, an ungrounded coplanar waveguide-based embedded resonator method for microwave substrate characterization was presented. The effective dielectric constant of the structure and the dielectric constant of microwave substrates can be calculated by the measured resonant frequency. The measured insertion losses at resonant frequencies and the 3 dB bandwidth can be used to determine the loaded and unloaded quality factors, including the dielectric quality factor which is related to dielectric loss tangent. The radiation loss and the extra length due to fringing effect caused by the open-end structure were taken into account to improve the extraction accuracy. The experimental unloaded quality factor of the proposed resonator at resonance order 1 reaches 211.3. The extracted dielectric constant and dielectric loss tangent of Taconic TLY at resonance order 1 are, respectively, 2.218 and 9.286×10−4, which are only 0.018 (relatively 0.82%) and 0.286×10−4 (relatively 3.18%) deviations from the datasheet values, respectively. The proposed resonator method is especially suitable for dielectric characterization of newly developed materials with the difficulty of realizing metal via holes, in which case substrate-integrated-waveguide (SIW) resonator methods are not applicable. When comparing with microstrip resonator methods, the proposed method is of higher quality factor, and it is more reliable and economical as well.