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In this letter, a low-scattering metasurface with dual-band, wide-angle, and polarization-insensitive features is proposed and validated by measurement. The metasurface converts incident electromagnetic wave into heat at S-band frequency, and disperses it into various reflected directions across X- and Ku-band frequencies. Furthermore, each operational mode works independently. The agreement between...
The paper proposes a differential feeding network with arbitrary frequency-dependent phase difference between the output ports. This network consists of a power divider, a C-section phaser and a TEM transmission line. It is applied to enhance the axial ratio bandwidth of circularly polarized antennas. A design example is provided and the result shows that the axial ratio bandwidth is largely improved...
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