Validation of the EDGES Low-band Antenna Beam Model

The response of the antenna is a source uncertainty in measurements with Experiment to Detect Global EoR Signature (EDGES). We aim validate beam model low-band (50-100 MHz) dipole comparisons between models and against data. find that simulations simplified over an infinite perfectly conducting ground plane are, one exception, robust changes numerical electromagnetic solver code or algorithm. For actual finite realistic soil properties, we two out three solvers agree well. Applying our analysis pipeline simulated driftscan observation from early EDGES instrument had 10 m $\times$ plane, residual levels after fitting removing five-term foreground data binned Local Sidereal Time (LST) average about 250 mK $\pm$40 variation solvers. A similar primary 30 sawtooth reduced LST-averaged residuals 90 $\pm$10 viable More broadly show larger planes generally perform better than smaller planes. Simulated have power which within 4$\%$ real observations, limitation net accuracy sky models. observe spectral structures fits match qualitatively suggesting frequency dependence reasonably represented by conductivity 0.02 Sm$^{-1}$ relative permittivity 3.5 yield good agreement spectra observations. This consistent properties reported Sutinjo et al. (2015) for Murchison Radio-astronomy Observatory, where located.