Wideband frequency reconfigurable metamaterial antenna design with double H slots

Abstract

This paper presents the design of wideband frequency reconfigurable metamaterial antenna with double H slots. The design is based on the idea of composite right/left-handed transmission line (CRLH-TL) technique. Bandwidth enhancement was achieved by utilizing series left-handed capacitor CL transmission line parameter. The design has several outstanding advantages which include efficient bandwidth to cover many lower Application bands with multi frequency operation characteristics. A comprehensive analysis and simulation were done by using computer simulation technology (CST) software to determine the performance and efficiency of the proposed antenna. From the result obtained, the antenna aquired bandwidth range which covered (2.3-5.2) GHz which is equivalent to 77% fractional bandwidth. The wideband antenna was reconfigured by using frequency reconfiguration technique. From the reconfiguration results, the antenna can be switch from wideband to two single bands which resonate at 2.4 GHz and 4.2 GHz and to dual band which resonate at 2.4 GHz and 4.2 GHz. The realized peak gain at 2.4 GHz is 2.28 dBi and 2.58 dBi for E and H field respectively. The maximum efficiency of 96% was obtained. The antenna can be use for WLAN, proposed lower 5G band and cognitive radio system for frequency sencing.

Improvement of energy consumption in MIMO with cognitive radio networks

“…Iterating the process over the spectrum to determine whether or not there is a gap is done with careful sensing conducted to the channel with the least amount of energy. In recent years, MIMO technology has gained significant importance in wireless communication, exclusively in the succeeding generation of wireless communication systems, by supporting much higher data rates than HSDPA and UMTS and 3G networks [17]- [20]. The performance of wireless communication systems is increased by the MIMO technique, which uses numerous antennas at the transmitter and receiver; the system is comprised of multiple transmit antennas (TX) and multiple receive antennas (RX).…”

The calculation of the field of an antenna located near the human head

“…The formation of such interference zeros is discussed in [21], [22] for example of, a Huygens element with an arbitrary ratio of currents and in [23], [24] for a system of two parallel electric dipoles (vibrators). The formation of the fixed zeros of the electric field at a finite distance from the system of radiators carried out by selecting the amplitude and phase difference of their currents [25].…”

Electronic Beam Steering Metamaterial Antenna with Dual-Tuned Mode of Liquid Crystal Material

“…To date, CRLH metamaterial antennas have been extensively applied in smart antenna, satellite communication and high-resolution radar to promote the system performance [17][18][19]. Moreover, electronic beam-steering CRLH metamaterial antennas integrated tunable components or materials have the ability to beam steer in a fixed frequency and increase the frequency reuse ratio and the spectrum utilization [20][21][22]. Familiar modulation methods, including varactor [23], ferrite [24], BST [25], MEMS [26] and mechanical tuning, are broadly applied in microwave and millimeter wave components.…”