Millimeter-wave bi-polar planar phaseless measurements and diagnostics: Characterization of a Ka-band patch array

In this paper, for the first time, the effectiveness of phaseless measurements and diagnostics for millimeter-wave antennas will be demonstrated using a Ka-band planar rectangular patch array. Using a newly constructed millimeter-wave bi-polar planar antenna measurement system at UCLA, we will show the viability and advantages of using phaseless techniques to facilitate millimeter-wave antenna measurement. To achieve this, a Ka-band patch array was designed, fabricated, and measured with the system at an operating frequency of 31.2 GHz. Two measurements, a full (amplitude and phase) measurement and a phaseless (amplitude only) measurement, were then conducted and processed to produce far-field patterns. These results were compared to verify the accuracy of the technique.