Pengaruh Arus Luaran LRC pada Metoda Q-Meter terhadap Hasil Pengukuran Nilai Sifat Dielektrik di Sekitar Frekuensi Radio

Abstract

Various measuring method of dielectric properties has been studied by researchers, one of wich is the Booton 160-A O-meter operated within the radio frequency range. Determination of dielectric properties by the O-meter is accomplised through the measurement of voltage (0) and capacitance (C) of the LRC, which is naturally in the form of alternating current (A C). Measurement of the AC voltage by a voltmeter shows instability of the measured value, while using an osci/oscope require an expensive apparatus. The problem seems can be solved by convertion of the LRC output from alternating to direct current. This paper is to study the influence of LRC output to the measured dielectric properties, by converting the output from alternating to direct current. The experiment showed that convertion of the LRC output into direct current can provide stability of the measurement. Comparison to the theoretical trend showed that dielectric properties determined by using the DC output are more reliable than that by the AC output. Keywords: dielectric constant, dielectric loss factor, radio frequency, direct current, alternating current