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Scattering performance of a reflectarray using a log-periodic dipole array (LPDA) element is demonstrated numerically and experimentally. The LPDA element and the reflectarray are designed using method of moments (MoM). The designed 10 × 1 reflectarray was fabricated using a 3D printing technology. A bistatic radar cross section (BRCS) of the designed reflectarray was measured in a radio anechoic...
The transmission factor from a 20 mm dipole antenna immersed in the human body equivalent liquid (HBEL) and the deionized water to the outside are investigated using the FDTD analysis and the measurement. Both calculated and measured transmission factor using the mixed-mode S-parameter method are shown good agreement. It is observed that the transmission factor increases as the frequency decreases...
In this letter, the scattering performance of a log-periodic dipole array (LPDA) is numerically and experimentally demonstrated. Radiation and scattering performance of the LPDA is shown. Numerical simulations clarify that a 3-dB bandwidth of an LPDA scatterer becomes narrow due to the distortion of its RCS pattern. Relation between the total length and bandwidth performance of the LPDA scatterer...
Measurement result of dipole antennas in deionized water is compared with numerical analysis. The results of FDTD simulation and measurement are shown good agreement. Maximum transmission coefficient of ™25 dB through the 74 mm thick deionized water was obtained.
Numerical analysis of the near-field power transfer using multi-antennas is performed based on the scattering parameters for an equivalent circuit model of multi-port networks. The transfer power efficiency is derived by using the multi-port scattering parameters. Since the multi-port scattering parameters are easily measured by a vector network analyzer and calculated by a full-wave numerical analysis,...
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