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Journal of Microwaves, Optoelectronics and Electromagnetic Applications

versão On-line ISSN 2179-1074

Resumo

RAMOS, Glaucio L.  e  REGO, Cássio G.. Characterization of the radiation pattern of antennas via FDTD and time-domain moment expansion. J. Microw. Optoelectron. Electromagn. Appl. [online]. 2014, vol.13, n.1, pp.67-84. ISSN 2179-1074.  http://dx.doi.org/10.1590/S2179-10742014000100006.

An alternative method is proposed to characterize the radiation pattern of antennas from an impulse response, based on a moment expansion together with a frequency domain near-to-far-field transformation via a FDTD/CPML solver. The approach introduced in the present work is intended for printed antenna analysis in special cases when the geometries to be modeled require a high degree of discretization in the space-time domain, which directly affects the frequency resolution when using FFT to perform the conventional NF-FF techniques. Results are compared with those obtained by a reference frequency-domain NF-FF technique and the applicability of the proposed method is demonstrated.

Palavras-chave : Finite-difference time-domain method; time-domain moment expansion; near-to-far-field transformation.

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