Experimental Determination of DRW Antenna Phase Center at mm-Wavelengths Using a Planar Scanner: Comparison of Different Methods

A study of the phase center position of dielectric rod waveguide (DRW) antennas (silicon and sapphire) for different millimeter-wave (mm-wave) frequencies is presented in this document. Phase center position is determined using data obtained by planar scanning and analyzed by means of different methods: least squares fit method with and without weighting coefficients and plane wave spectrum (PWS) analysis method. A study of the radiation pattern and phase center position for different mm-wave frequencies is provided and the results of the different methods are presented and compared.