Wideband transmitarrays based on anisotropic unit-cells for next generation sub-THz applications
Résumé
This paper presents an anisotropic transmitarray
for next-generation applications in the 300-GHz band. First, the
proposed three-layer unit-cell is analyzed theoretically to
demonstrate its effectiveness in transmission and bandwidth
operation. Then, two designs using different manufacturing
technologies are synthesized. The first one is based on a
standard printed circuit board process to represent a low-cost
solution. The second one uses lithography in fused quartz,
leveraging a higher fabrication and transmission phase
resolutions for more efficient transmitarray design. Based on
the two structures, two 40×40-element prototypes are realized
considering these two fabrication streams. The low-cost
prototype is measured, achieving a peak gain of 32.2 dBi with
31.8% aperture efficiency and a 3-dB gain bandwidth of 55 GHz
(19%).
Domaines
Electromagnétisme
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