An antenna design is presented for antenna performance improvement for WLAN applications at 5.2 GHz and 5.8 GHz. Improved Patch antenna gain and radiation efficiency has been achieved in this work. Two CSSRR have been etched in the ground plane to achieve size reduction for dual band operation. The proposed antenna provides good flexibility on selection of dual frequency operation by modifYing dimension of CSSRR and patch while capacitive matching has been achieved by gap coupling. The antenna was designed using CST V. 12 simulator.
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.
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