SWITCHABLE ACTIVE METASURFACE FOR DUAL BAND GAIN ENHANCEMENT

Arun Shaji, Anju Pradeep
2022 Progress In Electromagnetics Research M  
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 the OFF state, gain is enhanced at 2.4 GHz, while gain is reduced at 4.6 GHz. When the p-i-n diode is in the ON state, gain is
more » ... 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.
doi:10.2528/pierm22051201 fatcat:ylvwp447qzf3bpyvtzv25ehvea