The computation of antenna electromagnetic fields at nonasymptotic distances from cylindrical near-field measurements

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dc.contributor.authordu Toit C.F.
dc.contributor.authorCloete J.H.
dc.date.accessioned2011-05-15T16:03:31Z
dc.date.available2011-05-15T16:03:31Z
dc.date.issued1990
dc.description.abstractA technique for the determination of the electric field at arbitrary points in the space surrounding an antenna is described. The cylindrical modal expansion formulation of the electric field can be evaluated using A. C. Ludwig's (1968) algorithm after the factorization of the integrands into slowly and rapidly changing factors. The latter is achieved by factorizing the Hankel functions in the integrands using an asymptotic approximation. The modal coefficients of an E-plane sectoral horn were computed from cylindrical near-field measurements at 3 GHz. Using the method described, the copolarized electric field was computed in the E-plane at distances of 1 and 10 m from the antenna. It is concluded that the method can be used successfully to compute the electric field in the radiating near field and further.
dc.description.versionConference Paper
dc.identifier.citationIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
dc.identifier.citation1
dc.identifier.issn2724693
dc.identifier.urihttp://hdl.handle.net/10019.1/12655
dc.subjectElectric Fields--Computation
dc.subjectElectric Measurements
dc.subjectElectromagnetic Fields--Computation
dc.subjectElectromagnetic Waves--Measurements
dc.subjectAntenna Electromagnetic Field Computation
dc.subjectCopolarized Electric Fields
dc.subjectCylindrical Near Field Measurements
dc.subjectAntennas
dc.titleThe computation of antenna electromagnetic fields at nonasymptotic distances from cylindrical near-field measurements
dc.typeConference Paper
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