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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Pelland, P. Hindman, G. Newell, A. |
| Copyright Year | 2013 |
| Description | Author affiliation: Nearfield Syst. Inc., Torrance, CA, USA (Pelland, P.; Hindman, G.; Newell, A.) |
| Abstract | Over the years, spherical near-field (SNF) antenna measurements have become increasingly popular for characterizing a wide variety of antenna types. The SNF configuration allows one to measure data over a sphere surrounding the antenna, which provides it a unique advantage over planar and cylindrical near-field systems where measurement truncation is inherent. Like all antenna measurement configurations, SNF systems are susceptible to a number of measurement errors that, if not properly understood, can corrupt the antenna's far-field parameters of interest (directivity, beamwidth, beam pointing, etc.). The NIST 18-term error assessment originally developed for planar near-field measurements [1] has been adapted for SNF systems [2] and provides an accurate measure of the uncertainty in a particular SNF measurement. Once particular measurement errors are known, steps can be taken to reduce their impact on far-field radiation patterns. When manually assessing all 18 terms of the NIST uncertainty budget this procedure becomes tedious and time consuming. This paper will describe an acquisition algorithm that allows one to analyze all 18 error terms or a subset of those in automated fashion with minimal user intervention. Building upon previous research toward developing an automated SNF error assessment algorithm [3, 4], this new procedure will automatically generate tabulated and plotted uncertainty data for directivity, beamwidth and beam pointing of a particular far-field radiation pattern. Once measurement uncertainties are known, various post-processing techniques can be applied to improve far-field radiation patterns. Results will be shown for three antennas measured on large phi-over-theta SNF scanners. |
| Sponsorship | IEEE Antennas Propagation Soc. |
| Starting Page | 793 |
| Ending Page | 797 |
| File Size | 1830456 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781467321877 |
| e-ISBN | 9788890701832 |
| e-ISBN | 9788890701818 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-04-08 |
| Publisher Place | Sweden |
| Access Restriction | Subscribed |
| Rights Holder | EurAAP |
| Subject Keyword | Antenna measurements Uncertainty 18-term Time measurement Frequency measurement Measurement Automation Atmospheric measurements Measurement uncertainty Analysis NIST Spherical Near-Field Particle measurements Error Evaluation |
| Content Type | Text |
| Resource Type | Article |
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