Antenna Parameters Testing with Near-Field Scanning Technology
Antennas that fail to meet specified design criteria, regulatory requirements or consumer satisfaction either rapidly find the scrap heap or cause costly delays. If the antenna in question makes it to market and consumers identify a problem, it can create a widespread public relations nightmare. Designers therefore need to characterize an antenna to meet performance criteria including desired frequency, gain, bandwidth, impedance, efficiency, and polarization. Traditional antenna characterization requires full-fledged far-field testing or gathering near-field data sets to project far-field patterns. Unfortunately, the planar sampling mode, the fastest and least costly traditional near- or far-field technique, only generates reliable results for directional antennas. Omnidirectional antennas must currently be sampled in spherical mode in a sufficiently large, shielded test chamber to overcome potential sensor coupling.
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