On the Impact of Reactive Region on the Near-Field Channel Gain
Chongjun Ouyang, Zhaolin Wang, Boqun Zhao, Xingqi Zhang, Yuanwei Liu
Abstract
The near-field channel gain is analyzed by considering both radiating and reactive components of the electromagnetic field. Novel expressions are derived for the channel gains of spatially-discrete (SPD) and continuous-aperture (CAP) arrays, which are more accurate than conventional results that neglect the reactive region. To gain further insights, asymptotic analyses are carried out in the large limit of the aperture size, based on which the impact of the reactive region is discussed. It is proved that for both SPD and CAP arrays, the impact of the reactive region on near-field channel gain is negligible, even as the array aperture size approaches infinity.
Topics & Concepts
Channel (broadcasting)Computer scienceTelecommunicationsComputer networkElectromagnetic Compatibility and MeasurementsElectromagnetic Compatibility and Noise SuppressionRadio Frequency Integrated Circuit Design