The microstrip line is on the upper layer, and the SIW is on the bottom layer with the vertical metal walls realized by closely spaced vias.是什么意思_The microstrip line is on the upper layer, and the SIW is on the bottom layer with the vertical metal walls realized by closely spaced vias.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句