Wideband 1-bit reconfigurable transmission metasurface unit cell design in Ka-band with polarization hold and conversion.
Sci Rep
; 13(1): 20076, 2023 Nov 16.
Article
em En
| MEDLINE
| ID: mdl-37973813
ABSTRACT
In this paper, a wideband transmission unit cell is proposed for programmable metasurfaces operating in the Ka-band. The unit cell features a compact period of only 2.91 mm, corresponding to 0.34 λ0 at the center frequency of 35 GHz. A receiving layer, consisting of a patch loaded with two PIN diodes, is utilized to achieve 1-bit phase modulation, while a U-shaped patch serves as the transmitting layer to enable selection of linear polarization hold or conversion. Based on the multi-resonance principle, the proposed unit cell exhibits broadband behavior, as demonstrated by simulation results under periodic boundary conditions, which indicate a 3 dB transmission bandwidth of 29.4-40 GHz (30.5%). Two unit cells were fabricated and tested in a standard waveguide, with the minimum insertion loss of the two states tested being 1.2 dB and 3 dB bandwidths of 30.1-31.2 GHz and 33.5-38.5 GHz, respectively. The maximum 180° phase error is 10°, indicating the high quality of the proposed unit cell.
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MEDLINE
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En
Ano de publicação:
2023
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Article