Abstract
This communication presents a low-profile fully metallic high gain circularly polarized resonant cavity antenna, with a novel single-layer metasurface as superstrate operating at 300 GHz. The unit cell of the metallic metasurface layer consists of perforated grids of hexagonal and octagonal-shaped radiating apertures. The metasurface superstrate layer acts as a polarization convertor from linear-to-circular, which provides left-handed circularly polarized (LHCP) radiation. For simplicity and less design difficulty, a low cost laser cutting brass technology is proposed to design the antenna at sub-terahertz. The proposed circularly polarized resonant cavity antenna prototype has a low-profile planar metallic structure of volume 2.62.61.24. Experimental results validate the design concept. The antenna yields a measured LHCP gain of 16.2 dBic with a directivity of 16.7 dBic at 302 GHz. This proposed circularly polarized resonant cavity antenna finds potential application in 6G sub-terahertz wireless communications.
Highlights
Nowadays, the sixth generation (6G) wireless systems are a hot topic in academic/industrial research
The use of the sub-THz frequency band has been established around 300 GHz (252–325 GHz) in IEEE Std.802.15.3d–2017 [3], for future wireless communications
We introduce a novel metallic single layer metasurface (MTS), In this communication, we introduce a novel metallic single layer metasurface (MTS), as superstrate, with a resonant cavity antenna (RCA) for high gain with circular polarization as superstrate, with a resonant cavity antenna (RCA) for high gain with circular polarizaat sub-THz
Summary
The sixth generation (6G) wireless systems are a hot topic in academic/industrial research. They are currently designed to operate at higher frequencies, often at the sub-terahertz (THz) spectrum (0.1–1 THz), to increase the throughput of wireless links with features of low-latency [1,2]. The antenna is a key element for any type of wireless communication systems. Antennas working in this sub-THz frequency band need to be with high-gain characterization, to overcome these drawbacks, and use circular polarization to avoid depolarizing effects, which are big challenges in terms of fabrication processes at higher frequencies
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