http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jong-Heon Kim,C. Venkataseshaiah,Joon-Ung Lee 한국정보과학회 1997 Journal of Electrical Engineering and Information Vol.2 No.5
This paper presents the results of studies made for measuring the relative complex permittivity of PCB sheet material in the frequency range of 100 MHz~l GHz using vector network analyzer. A measurement cell was developed for this purpose using broad-band impedance method and the dielectric constant and loss tangent of two PCB sheet materials, glass-epoxy and teflon, were measured. The effect of copper cladding was studied.