Studi Analisis Sifat Dielektrik Tanah dengan Variasi Porositas Pada Frekuensi Resonansi Rendah

Abstract

The equipment to measure dielectric properties of soil samples with
lissajous method has been designed in Electronic and Instrumentations
Laboratory, Faculty of Science and Technique, Jenderal Soedirman University,
Purwokerto. The fundamental parts of this equipment are signal generator,
cathode ray oscilloscope (CRO) and parallel plate. Thus, the soil samples which
be researched is placed in zone between parallel plate, as dielectric material. If
signal generator supply electric field into the parallel plate, hence response of
samples to electric field is shown with voltages values on oscilloscope (CRO).
Based on this voltages values, so that can be calculated a dielectric permittivity,
dielectric loss and tangent loss of soil samples. The number of samples that
measured its dielectric properties are three samples, which contains of top soil,
smooth sand of river, and sediments rocks. The measurement to dielectric
properties with variation of porosity is done to samples at low resonance
frequency of 600 kHz and 2,75 MHz. The results which obtained show that a
linear relation between dielectric constant of soil samples to its porosity, but with
empirical equations different for every samples.