Naslov
A Reflective Active Metasurface

Autori
Lončar, Josip ; Grbic, Anthony ; Hrabar, Silvio

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings on 2016 IEEE International Symposium on Antennas and Propagation/USNC-URSI National Radio Science meeting / - : Institute of Electrical and Electronics Engineers (IEEE), 2016, TH-UB.1A

Skup
2016 IEEE International Symposium on Antennas and Propagation/USNC-URSI National Radio Science meeting

Mjesto i datum
Fajardo, Portoriko, 26.06.2016. - 01.07.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
active metamaterials ; metasurface

Sažetak
We propose an active metasurface which overcomes the previously mentioned challenges, while maintaining a low profile. The metasurface is designed to operate in reflection mode at 10 GHz with a 30% relative bandwidth. It consists of subwavelength unit cells and provides a gain of 10 dB. It’s operation can be compared to that of high impedance surfaces. However, unlike a high impedance surface at resonance, the metasurface does not reflect a wave with zero degree phase shift, but rather receives the wave, amplifies it and retransmits it. To ensure stable operation, coupling between the input and output of the metasurface is minimized by receiving and transmitting orthogonal polarizations. The metasurface consists of three layers: a subwavelength patch array, a ground plane with apertures shared between adjacent unit cells, and an active layer. The novelty of the design lies in its symmetrical excitation of the unit cells, which reduces cross-coupling between input and output to levels below -30 dB over the entire bandwidth. The stability of the structure, as well as its overall performance, has been verified through a combination of full-wave (Ansys HFSS) and time domain (Agilent ADS) simulations.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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