Compact Wearable Antenna with Metasurface for Millimeter-Wave Radar Applications

Abstract

Three metasurfaces (MTS) are designed to be combined with a series end-fed 1 × 10 array antenna with a modified Dolph-Chebyshev distribution for imaging applications in the millimeter frequency range, 24.05–24.25 GHz. A reduction in secondary lobes and an increase in FTBR can be achieved while preserving gain, radiation efficiency, SLL and size using an MTS–array combination. Moreover, as a result of each single-layer MTS–array combination, operation bandwidth is widened, with gain and radiation efficiency enhancement. The overall devices’ size is 86.8 × 12 × 0.762 mm3. The envisioned application is collision avoidance in aid to visually impaired people at a medium-long distance.

Miniaturized circularly polarized metasurface antenna based on characteristic mode analysis

“…In recent years, metasurface antennas have had outstanding performance in improving antenna gain and broadening bandwidth. They are widely used in handheld devices, convenient devices, and wireless satellite communication 1,2 . However, the metasurface antenna also has the problem of oversized size which is not suitable for the application in compact space antenna arrays.…”