AR and sand-pit measurements for polar antenna design

<p dir="ltr">Dataset for an investigation into the measurement of snow and sea ice using different antenna polarizations. Sea ice is a dispersive and anisotropic medium that can be significantly attenuating at microwave frequencies. An Arctic environment was simulated in CST and emulated in an experiment using sand, clay and road aggregate. The dataset includes data from simulations, characterization of the axial ratio, noise and S-parameters of prototype spiral antennas, and the measurement of the experimental surrogate Arctic environment the prototype spiral antennas and Vivaldi dual-polarized horn antennas at horizontal and vertical polarizations.</p><p dir="ltr">Structure:</p><ul><li>XY_Data folder: contains S-Parameter and positional data from different trial runs of clay buried under sand with spiral antennas and the horn antennas. </li><li>noRAM, closeRAM, farRAM, dualRAM fodlers: contains S21 data at different angles for inversion to axial ratio (AR) for different RAM configurations for the spiral antennas (no RAM backing, backing at 2 mm, backing at 40 mm and backing at both 2 and 40 mm)</li><li>archSpiral2_sparams_corrected: S-Parameters measured of the spiral antennas directly coupled</li><li>noise_archSpiral2_corrected: VNA noise floor</li><li>impulse2: input signal to the antennas</li><li>vertpot, horiport, spiralport, spiralortport: simulated data from CST regarding the measurement of anisotropic sea ice with vertically and horizontally polarized antennas</li><li>Permittivity_ice_case_8: data characterizing the electrical behaviour of first year Arctic sea ice at -20 degrees C with spherical brine inclusions used to define the simulated sea ice in CST</li></ul><p></p>