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008200821s1996    onca    ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0861 |aCo24-3/8-1996-2E-PDF
1001 |aJenkins, Robert W., |eauthor.
24512|aA comparison of modelled and measured HF antenna array patterns / |cby R.W. Jenkins and L.E. Petrie.
264 1|aOttawa : |bCommunication Research Centre, Industry and Science, |c1996.
300 |a1 online resource (vi, 26 pages) : |billustrations.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCRC technical note ; |v96-002
500 |a"September 1996."
500 |aDigitized edition from print [produced by Innovation, Science and Economic Development Canada].
504 |aIncludes bibliographical references (page 21).
5203 |a"The relative-phase response and gain patterns found by numerical modelling of an HF antenna array of vertical whip antennas were compared with the patterns found by actual measurements. While some features of the measured patterns agree with the model, other significant features did not. The disagreement could be due to ground inhomogeneities and other local features as well as differences between the actual and modelled antenna array such as discrepancies in antenna position and orientation, poor connections to ground radials, and differences in the modelled and actual antenna loading. In most cases where the elements were closely spaced, numerical modelling provided a somewhat better estimate of the antenna gain and relative-phase response patterns than the simple assumption of azimuth-independent gains and a relative phase response consistent with a spherical wavefront centered on the transmitter. However, for more remote antenna elements, modelling did not provide a better estimate; nor did it provide a better estimate for the lowest modelled frequency. Actual pattern measurements, on the other hand provided significantly better pattern estimates in all cases"--Abstract, page iii.
530 |aIssued also in print format.
650 0|aPhased array antennas|xMathematical models.
650 6|aAntennes-réseaux à commande de phase|xModèles mathématiques.
7102 |aCommunications Research Centre (Canada), |eissuing body.
830#0|aCRC technical note ;|vno. 96-002.|w(CaOODSP)9.882494
85640|qPDF|s1.24 MB|uhttps://publications.gc.ca/collections/collection_2020/isde-ised/Co24/Co24-3-8-1996-2-eng.pdf