| 摘要 |
An element of parallel flat plate line type suitable for operation at a higher speed and with a higher frequency is provided. The element is characterized by including a first metallic member 1 including a flat plate section 11 and a projected section 12 in which a plurality of projections are formed to stand on one surface of the flat plate section 11 in a direction substantially vertical to the surface with gaps therebetween, a second metallic member 2 including a flat plate section 21 and a projected section 22 in which a plurality of projections are formed to stand on one surface of the flat plate section 21 in a direction substantially vertical to the surface with gaps therebetween, and a dielectric film 31 formed between the projections and the gaps of the element of parallel flat plate line type formed by inserting the projections of the first metallic member 1 in the gap of the second metallic member 2 and inserting the projections of the second metallic member 2 in the gap of the first metallic member 1 , wherein a transmission line is formed between the first metallic member 1 and the second metallic member 2 along the dielectric film 31 , the transmission line being formed to have transmittivity ranging from -140 dB to -20 dB for a high-frequency electromagnetic wave ranging from 100 kHz to 10 GHz supplied from one terminal.
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