| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that the area of a stainless plate under a conductor concerns the transmission loss, the hole pitch concerns the transmission band, and there are some lines not ensuring the transmission band, depending on the a rate of hole area the hole pitch of the stainless plate. SOLUTION: It is found that increasing the rate of hole area (H/HP) of holes 33 formed in a stainless plate 30 reduces the line loss, and the transmission band can be ensured up to a frequency determined to such extent that the shortest wavelength is 5 times as much as the hole pitch HP. A transmission line is constituted with a maximum hole pitch HP set to 1/5 times as short as a wavelength meeting a required band involving harmonic components of a recorded waveform, this ensuring a low transmission loss and the required transmission band.
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