Patent ID: 7242265
Filing Date: 2007-07-10
Classification: H01P,H05K

Abstract:
1. An element of parallel flat plate line type comprising: a first metallic member including a first flat plate section and a projected section in which a plurality of projections are formed to stand on a surface of the first flat plate section in a direction substantially vertical to the surface with gaps therebetween; a second metallic member including a second flat plate section and a projected section in which a plurality of projections are formed to stand on a surface of the second flat plate section in a direction substantially vertical to the surface with gaps therebetween; and a dielectric film, wherein the first metallic member and the second metallic member are disposed such that the projections of the first metallic member are positioned in the gaps of the second metallic member and the projections of the second metallic member are positioned in the gaps of the first metallic member and the dielectric film is disposed between the first metallic member and the second metallic member, wherein a transmission line is formed between the first metallic member and the second metallic members along the dielectric film, the transmission line being formed such that for a high-frequency electromagnetic wave ranging from 100 kHz to 10 GHz which is supplied from an input terminal of the transmission line and is delivered to an output terminal thereof, the transmission line has transmittivity ranging from −140 dB to −20 dB.