Design of a Quad-Band 6CB Nematic Phase Liquid Crystal Antenna for Commercial Wi-MAX and WLAN Applications

A Quad-band 6CB nematic phase liquid crystal antenna for commercial Wi-MAX and WLAN applications have been developed in present work. Now a day’s multiple bands working antennas become very useful in wireless communication applications. To achieve the multiple bands substrate with proper dielectric constant and structure of the patch plays major role. In this present work glass substrate with 6.438 dielectric constant have been taken for achieving the desired band of applications. Two glass substrates with the size of 21x25mm2 and 19x19mm2 have been taken with the gap of 0.005mm is taken to fill the LC (liquid crystal). The patch of proposed design is triple fork shaped, which is achieved by modifying the standard rectangular patch. Proposed antenna is having full ground at back side of the substrate and both ground and patch are connected through SMA connector for excitation of antenna. The designed antenna is having quad band features, operating at the range of 2.57-3.14GHz, 3.47- 3.84GHz,4.73-5.19GHz, and 5.89-6.46GHz respectively. The resonant frequencies of the designed antenna are 2.88GHz,3.66GHz,4.94GHz and 6.2GHz, which includes the commercial WLAN and Wi-MAX applications respectively.