K15 Nematic Phase Liquid Crystal Material Based Double-Dipole Reconfigurable Antenna

Abstract

In this paper, the study is carried out on frequency reconfigurable antenna for wireless applications. The tuning of the antenna is done by changing its effective electrical length. The proposed antenna structure consists of two dipoles. By connecting and disconnecting the slots, lengths of the coplanar strips of the dipoles can be varied .Therefore antenna can be operated in both multi-band and wideband frequencies. The results plotted after simulations propose that the designed antenna is capable of maintaining its operating frequency over a range of 1.5GHz to 8 GHz. This frequency reconfigurability implemented symmetrically on the two dipoles enhances the overall gain of the antenna from 3dB to 5dB at multiple bands over different combinations mentioned in this paper.

Reconfigurable holographic antenna with low sidelobe level based on liquid crystals

“…Among them, the nematic LCs are relatively cheap, respond to low voltages and are highly linear under large RF fields [13][14][15][16][17]. Due to the continuous tunability, high operating frequency, low power consumption, low loss and compact package of nematic LCs [18][19][20], the reconfigurable LC-LWAs attract a lot of researchers' attention. Nevertheless, the LC-LWAs suffer from small beam scanning range due to the limited tunability of LC materials [6][7][8][9][10].…”