ELECTRONIC APPARATUS CASE

摘要

An electronic apparatus case including: a circuit board provided on a lower case, the circuit board having a plurality of signal lines in parallel, each specified area of the circuit board between each adjacent pair of the plurality of signal lines having a plurality of first through holes and a plurality of second through holes, the plurality of first and second through holes respectively being arranged in a first and a second lines at substantially equal interval of 1/8 or less of a wavelength of signals propagating in the plurality of signal lines, the first line and the second line being arranged in parallel, each center of each of the plurality of first through holes and each center of each of the plurality of second through holes being shifted with a gap in a direction of the first line and the second line.

主权项

1. An electronic apparatus case comprising:
a lower case; a circuit board provided on the lower case, the circuit board having a plurality of signal lines in parallel, each specified area of the circuit board between each adjacent pair of the plurality of signal lines having a plurality of first through holes and a plurality of second through holes, the plurality of first through holes being arranged in a first line at substantially equal interval of ⅛ or less of a wavelength of signals propagating in the plurality of signal lines, the plurality of second through holes being arranged in a second line at the substantially equal interval of ⅛ or less of the wavelength of signals propagating in the plurality of signal lines, the first line and the second line being arranged in parallel, each center of each of the plurality of first through holes and each center of each of the plurality of second through holes being shifted with a gap in a direction of the first line and the second line; a lid provided over the circuit board so as to substantially entirely cover the circuit board; and an inner frame provided between the circuit board and the lid, the inner frame and the circuit board and the lid forming a plurality of separated spaces that respectively surround the plurality of signal lines.