Phase calibration of a PCS wideband antenna array system

This paper investigates parameters that determine the phase stability of a PCS antenna beam steering system and the effectiveness of a reference channel for correcting phase instability. It presents data collected using a multi-channel broadband receiver developed for advanced antenna algorithm testing. Phase data collected in the laboratory is contrasted with roof top data showing variability caused by environmental effects such as temperature changes. Data from a reference signal and data from a simulated mobile using a different reference oscillator are also contrasted. Measurement data collected using the reference channel indicates that the relative phase between channels varies by ±0.5° over one day. Data collected with a simulated mobile reference oscillator in a non-controlled environment indicates that the relative phase between channels varies by ±5° over one day