To Measure Relative Permittivity of Atmospheric Ice Using Frequency Sweep

The use of AD59333 IC for detecting atmospheric ice and atmospheric ice type was evaluated in this article. A prototype circuit was developed and was tested using a frequency sweep from 40 Hz to 20 kHz. The IC was calibrated using 100 kW resistor. The real and imaginary components of discrete Fourier transform were recorded at each frequency increment in order calculate the gain factor at each frequency increment. The unknown impedance was then calculated at each frequency increment. Results reflect that it was possible to use the dielectric loss data to detect an icing event and however it was difficult to determine icing type using AD5933 IC