Generalized methodology for antenna design through optimal infinitesimal dipole model

Clauzier, Sébastien; Mikki, Said; Antar, Yahia M. M.

doi:10.1109/iceaa.2015.7297321

Cited by 12 publications

(9 citation statements)

References 4 publications

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“…In spite of its extreme simplicity, this source has received considerable attention in classical antenna theory, usually under the rubric of Hertizan dipole [10], or electrically small antennas [11]. Moreover, it can be shown that any current that is not electrically small can be expanded into an optimized infinitesimal dipole model composed of only a few such infinitesimal sources [12][13][14][15]. For these reasons, we propose that understanding the basic behaviour of a T wave nonlocal antenna should start with a thorough investigation of such fundamental infinitesimal-dipole-based nonlocal antenna systems.…”

Section: Transverse Wave Nonlocal Antenna Systemsmentioning

confidence: 99%

Theory of Electromagnetic Radiation in Nonlocal Metamaterials --- Part Ii: Applications

Mikki¹

2020

PIER B

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We deploy the general momentum space theory developed in Part I in order to explore nonlocal radiating systems utilizing isotropic spatially-dispersive metamaterials. The frequencydependent angular radiation power density is derived for both transverse and longitudinal external sources, providing detailed expressions for some special but important cases like time-harmonic-and rectangular-pulse-excited small dipoles embedded into such isotropic metamaterial domains. The fundamental properties of dispersion and radiation functions for some of these domains are developed in examples illustrating the features in nonlocal radiation phenomena, including differences in bandwidth and directivity performance, novel virtual array effects, and others. In particular, we show that by a proper combination of transverse and longitudinal modes, it is possible to attain perfect isotropic radiators in domains excited by small sinusoidal dipoles. The directivity of a nonlocal small antenna is also shown to increase by possibly four times its value in conventional local domains if certain design conditions are met.

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Section: Transverse Wave Nonlocal Antenna Systemsmentioning

confidence: 99%

Theory of Electromagnetic Radiation in Nonlocal Metamaterials --- Part Ii: Applications

Mikki¹

2020

PIER B

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“…A useful alternative technique for ECC calculation is recently introduced by researchers, which uses spatial antenna current distributions instead of the 3D far-field patterns of the antennas [12]- [15]. This technique requires the evaluation of Cross-correlation Green's functions (CGF), along with the amplitude and phase distribution of antenna currents on the antenna structure, to accurately determine the ECC [12]- [15].…”

Section: Introductionmentioning

confidence: 99%

Application of Cross-Correlation Greens Function Along With FDTD for Fast Computation of Envelope Correlation Coefficient Over Wideband for MIMO Antennas

Sarkar¹,

Srivastava²

2017

IEEE Trans. Antennas Propagat.

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In this work 1 , the concept of cross-correlation Green's functions (CGF) is used in conjunction with the finite difference time domain (FDTD) technique for calculation of envelope correlation coefficient (ECC) of any arbitrary MIMO antenna system over wide frequency band. Both frequency-domain (FD) and time-domain (TD) post-processing techniques are proposed for possible application with this FDTD-CGF scheme. The FDTD-CGF time-domain (FDTD-CGF-TD) scheme utilizes time-domain signal processing methods and exhibits significant reduction in ECC computation time as compared to the FDTD-CGF frequency domain (FDTD-CGF-FD) scheme, for high frequency-resolution requirements. The proposed FDTD-CGF based schemes can be applied for accurate and fast prediction of wideband ECC response, instead of the conventional scattering parameter based techniques which have several limitations. Numerical examples of the proposed FDTD-CGF techniques are provided for two-element MIMO systems involving thin-wire half-wavelength dipoles in parallel side-by-side as well as orthogonal arrangements. The results obtained from the FDTD-CGF techniques are compared with results from commercial electromagnetic solver Ansys HFSS, to verify the validity of proposed approach.

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“…In spite of its extreme simplicity, this source has received considerable attention in classical antenna theory, usually under the rubric of Hertizan dipole [32], or electrically small antennas [33]. Moreover, it can be shown that any current that is not electrically small can be expanded into an optimized infinitesimal dipole model comprised of only few number of such infinitesimal sources [34][35][36]. For that reason, we propose that understanding the basic behaviour of a T wave nonlocal antenna should start with focused investigation of such fundamental infinitesimal-dipole-based nonlocal antenna systems.…”

Section: Transverse Wave Nonlocal Antenna Systemsmentioning

confidence: 99%

Nonlocal Antenna Theory - Part II: Applications

Mikki¹

2020

Preprint

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Generalized methodology for antenna design through optimal infinitesimal dipole model

Cited by 12 publications

References 4 publications

Theory of Electromagnetic Radiation in Nonlocal Metamaterials --- Part Ii: Applications

Theory of Electromagnetic Radiation in Nonlocal Metamaterials --- Part Ii: Applications

Application of Cross-Correlation Greens Function Along With FDTD for Fast Computation of Envelope Correlation Coefficient Over Wideband for MIMO Antennas

Nonlocal Antenna Theory - Part II: Applications

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