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2022-07-18
Switchable Active Metasurface for Dual Band Gain Enhancement
By
Progress In Electromagnetics Research M, Vol. 111, 209-219, 2022
Abstract
A novel active metasurface which is switchable to accomplish dual band gain enhancement is reported. The metasurface is used as a superstrate above the dual band patch antenna working at 2.4 GHz and 4.6 GHz. The gain of the antenna is enhanced by 3.5 dB at both frequencies. Switching between the frequencies is enabled by a p-i-n diode. When the p-i-n diode is in OFF state, gain is enhanced at 2.4 GHz, while gain is reduced at 4.6 GHz and when the p-i-n diode is in ON state, gain is enhanced at 4.6 GHz, but reduced at 2.4 GHz. The diode is controlled by biasing with a regulated DC source. The efficiency of the antenna is 70% at 2.4 GHz and 85% at 4.6 GHz. The simulated and measured results show good agreement. The distance between the antenna and the superstrate is 6 mm, which is 0.048λ at 2.4 GHz and 0.092λ at 4.6 GHz. This superstrate can be used in WLAN and Sub-6 GHz 5G applications.
Citation
Arun Shaji B K, and Anju Pradeep, "Switchable Active Metasurface for Dual Band Gain Enhancement," Progress In Electromagnetics Research M, Vol. 111, 209-219, 2022.
doi:10.2528/PIERM22051201
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