Thirdly, dual-mode filter miniaturization designs with LTCC (Low Temperature Co-fired Ceramic) multi-layer structure were studied in this thesis.

再次，本文研究了LTCC多层结构的小型化双模滤波器。

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Besides, in the SMCW structure, the thickness of the guiding layer can be enlarged to submillimeter scale and can contain ultrahigh order guided modes with mode index of over 1000.

另外，对称金属包覆波导的导波层厚度还可以扩展至亚毫米甚至毫米量级，并因此能够容纳模序数上千的高阶导模。

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