| Autor: |
Cho, Sungmin, Youn, Youngno, Hong, Wonbin, Song, Ho-Jin |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Antennas & Propagation; Oct2021, Vol. 69 Issue 10, p6444-6452, 9p |
| Abstrakt: |
This article presents a reconfigurable Fresnel zone plate (FZP) operating at 30 GHz with a low-cost printed circuit board (PCB) process. In general, limited fabrication tolerance greatly limits the optimal design of reconfigurable unit cells at millimeter-wave frequencies. In this work, the freedom of the unit-cell design is improved using a fixed I-shaped element as an impedance matching layer. In addition, $N +M$ control lines like those of the conventional display grid are employed to control $N\times M$ cells in the E- or H-plane. The transmittance of the unit cell was measured to be–3.5 and–24.5 dB in the transparent mode and opaque mode, respectively, at 30 GHz. A binary-amplitude FZP prototype with $32\times32$ elements exhibited ±40° beamforming on both the E- and H-planes with a maximum gain at the broadside of 9 dBi. The measured power dissipation was approximately $0.31~\mu \text{W}$ per single scan at 30 GHz, which is less than 1/100.000 that of the conventional phased array system. Finally, the beamforming of various 5G signals was experimentally demonstrated without signal degradation using the FZP prototype. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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