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The validation of a unique non-invasive measurement facility for electrically small antennas in the frequency range 500 MHz to 3 GHz is presented. The antenna-to-range interface and low-reflection RF environment has been studied through validation measurements. The aim was to quantify the magnitude of the reflections and to find out the source of the reflections. This helped to determine the best...
The antenna-to-range interface can have a large effect when measuring the radiation performance of electrically small antennas for wireless communications. Small antennas, with their almost omni-directional patterns, need to be tested in very low reflection environments. However, the connection of the antenna to the RF measurement subsystem, particularly where cables, or other conducting interfaces,...
This paper presents a tutorial on the methods that can be used to analyse and predict the errors for near-field antenna measurements. The paper makes use of an 18-point uncertainty budget [1] for antenna gain measurements in a planar range and adapts it for other types of measurement, such as gain measurements in a spherical near-field range. It discusses the form the errors can take and how to identify...
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