Keeping Mobile Communication Channels Static With Antenna Counter-Movements

This work investigates how well mobile wireless communication channels can be kept static during device movements when the antenna performs appropriate counter-movements. A prototype is built and proof-of-concept experiments are performed for linear movement in the 2.45 GHz industrial, scientific and medical (ISM) frequency band in an anechoic chamber and in a static office environment. The technique is assessed quantitatively. The measured data show that fluctuations of receive power can be decreased by a factor of thousand as the antenna no longer experiences small scale fading. Changes in the phase are brought down to values smaller than 10° and no longer scale with the traveled distance. Mathematical channel models are derived from the measurements.