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This report contains an analysis of the data obtained from the antenna pattern measurements performed in December 1993 in the EMSL laboratory. The goal of these measurements is the characterisation of the two-way antenna pattern in the area around the focus of the EMSL. The characterisation has been performed by measuring the response of a test object (metallic sphere, radius = 15.25 cm) in different positions around the focus and comparing the results with the response of the same target placed in the focus. The test object is supported by a special arm made with a low dielectric constant material and suitably covered by absorbing material in order to reduce the direct scattering of the target holder and the interaction with the test target itself. The measurements have been done in the frequency range 2-26 GHz, in polarimetric mode, for the quasi-monostatic antenna configuration. The antenna response has been measured over two perpendicular planes respectively perpendicular and parallel to the antenna boresight and passing through the laboratory focus. The full frequency range has been split in several sub-bands and for each band the normalised power response of the copolar channels has been computed, interpolating the measured data. In addition the residual cross-polarisation purity pattern after polarimetric calibration has been investigated.

Additional information

Authors: TARCHI D, Fondazione Scienza per l'ambiente, Firenze (IT);NESTI G, JRC Ispra (IT);OHLMER E, JRC Ispra (IT);WEINBERGER W, JRC Ispra (IT);CHENNEAUX F, JRC Ispra (IT);VAN DER AAT C, JRC Ispra (IT)
Bibliographic Reference: EUR 15770 EN (1994) 74 pp., FS, free of charge
Availability: Available from Joint Research Centre, Publication Department, I-21020 Ispra (Va.) (IT)
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