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A Circularly Polarized Sub-Terahertz Antenna With Low-Profile and High-Gain for 6G Wireless Communication Systems
Ist Teil von
IEEE access, 2021-01, Vol.9, p.122607-122617
Ort / Verlag
Piscataway: IEEE
Erscheinungsjahr
2021
Link zum Volltext
Quelle
EZB Electronic Journals Library
Beschreibungen/Notizen
A low-profile high-gain fully-metallic circularly polarized (CP) Fabry-Perot cavity (FPC) antenna using laser cutting technology at 300 GHz is presented. The CP-FPC antenna consists of seven metallic layers arranged from the bottom to the top: a ground layer, an integrated stepped horn element (three layers), a coupling slots layer, a cavity layer, and an aperture-frequency selective surface (FSS) layer. The high gain and self-generation of circular polarization are made by using this FSS layer by introducing periodic hexagonal-shaped aperture in a thin metallic layer. The aperture-FSS layer is used to excite two orthogonal modes of equal in magnitude and in phase quadrature, thus obtaining the RHCP radiation. The proposed CP-FPC antenna structure achieves a measured peak RHCP gain of 16.5 dBic at 292 GHz. The antenna achieves a measured impedance bandwidth of 281- 305 GHz for the reflection coefficient less than −10 dB. The axial ratio (AR) bandwidth AR ≤3 dB is 5.12 GHz from 292.8 to 297.92 GHz. The fabricated CP-FPC antenna uses a low-cost laser cutting technique with a low-profile and an area of 2.6 mm <inline-formula> <tex-math notation="LaTeX">\times2.6 </tex-math></inline-formula> mm <inline-formula> <tex-math notation="LaTeX">\times1.24 </tex-math></inline-formula> mm. The experimental results confirm a good agreement between the simulation and the measurements.