High-$Q$ Resonators and Filters Inside Advanced Low-Temperature Co-Fired Ceramic Substrates Using Fine-Scale Periodicity
High-$Q$ Resonators and Filters Inside Advanced Low-Temperature Co-Fired Ceramic Substrates Using Fine-Scale Periodicity
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采用精细周期性的先进低温共烧陶瓷基板内的高 Q$ 谐振器和滤波器
DOI：
10.1109/tmtt.2008.919375
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发表时间：
2008
影响因子：
4.3
通讯作者：
W. Chappell
中科院分区：
文献类型：
--
作者：
X. Gong;T. Smyth;E. Ghaneie;W. Chappell
有效的介质是通过对材料进行图案化来克服固有的材料损失而产生的。研究了两种不同类型的有效介质，即窗玻璃介质和由细尺度周期性形成的层状介质。演示了材料中不同穿孔的效果。特别是，在分层介质中可以观察到介质损耗的极大降低，使得高Q谐振器和滤波器有可能从相对损耗的材料中分离出来。低温共烧陶瓷(LTCC)的制备通过实现这两种有效的层层介质，可以形成先进的超材料衬底。使用分层介质概念展示了高Q(空载品质因数高达762)谐振器，它将介质损耗降低了大约50%。测试结果表明，在AT频段，双极点滤波器的插入损耗低至0.47分贝，带宽为8.5%。空载Q因子比均匀LTCC谐振器的Q因子大得多，后者限制在空载Q因子约为400。
Effective media are shown to be created by patterning a material to overcome inherent material losses. Two different types of effective media, i.e., the windowpane and stratified media formed by fine-scale periodicity, are investigated. The effect of different perforations in the material is demonstrated. In particular, a great reduction in dielectric loss is observed in the stratified medium, making high-Q resonators and filters possible out of relatively lossy materials. Low-temperature co-fired ceramic (LTCC) fabrication can form advanced metamaterial substrates by realizing these two layer-by-layer effective media. High-Q (unloaded quality factors up to 762) resonators are demonstrated using the stratified medium concept, which reduces the dielectric loss by roughly 50%. Two-pole filters at AT-band are measured to have insertions losses as low as 0.47 dB with 8.5% bandwidth. The demonstrated unloaded Q factor is much larger than that of a homogenous LTCC resonator, which is limited to an unloaded Q factor of approximately 400.