Tunable PDEBG using ferrite‐based metasurface for WiMaX application

Abstract

This article presents a tunable ferrite‐based anisotropic reflective metasurface, which provides a method to manipulate the TE and TM polarized waves separately, and has much stronger ability to control electromagnetic waves and provides different phase difference between two reflected polarized waves. This eventually leads to various polarized reflected waves starting from linear polarization to RHCP and LHCP. Ferrite slab is used for realizing anisotropic behavior. A novel method for tunability of single polarization response is observed. A wired dipole antenna operating at 3.5 GHz is designed above metasurface at height d. 95 k A/m of DC biasing is applied in both X and Y directions in ferrite‐based metasurface to obtain RHCP and LHCP reflected waves from linearly polarized incident waves from metasurface. Moreover, polarization switchable dipole antenna is realized by changing the biasing direction. Furthermore by varying biasing, tunability of AR is realized from 3.3 to 4 GHz. The metasurface is simulated and designed on HFSS v.16.

Tunable liquid crystal metasurface with polarization selection characteristic

“…In recent years, tunable and reconfigurable metasurfaces are more desirable for rapid developments in multifunctional and multistandard communication systems. Tunable and reconfigurable metasurfaces were achieved by various methods, such as micro-electromechanical systems (MEMS), varactor diode, liquid crystal (LC), etc [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Ferrite is an approach to realize tunability [14].…”

“…Tunable and reconfigurable metasurfaces were achieved by various methods, such as micro-electromechanical systems (MEMS), varactor diode, liquid crystal (LC), etc [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Ferrite is an approach to realize tunability [14]. However, the ferrite-based metasurface is bulky.…”