MIMO Reconfigurable Antennas for Wi-Fi 2.4 GHz Communication (original) (raw)
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The rapid development in the sector of wireless communication demands for system that fulfill multifarious needs and standard requirements which are increasing day by day. Existing antennas like wire, loop, travelling wave antenna does not meet the requirements of modern-days wireless communications. Design of reconfigurable antenna enables one antenna to be used for numerous applications. This antenna can switch its characteristics in real time condition. According to industrial requirements 5G wireless communication devices should be smaller in size and provide high data rate, channel capacity, multiband operations so that it can push the development of more versatile wireless technologies compared to single antenna. Design of reconfigurable MIMO antennas is the best solution to such requirements. MIMO antenna already proved in Wi-Fi, WiMAX and LTE wireless services that it can provide high data rate throughput and avoid interference. In MIMO system multiple antennas are existing ...
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Four-element reconfigurable multiple-input-multiple-output (MIMO) antennas for dual band applications are proposed. The frequency reconfigurability of the proposed antennas is achieved by incorporation of three PIN diodes within the single element. The antenna covers multiple switchable operating bands for Worldwide Interoperability for Microwave Access (Wi-MAX)/Wireless Local Area Network (WLAN) applications (3.4-3.6GHz, 3.8-3.86GHz, 5.18-5.27GHz, 5.35-5.5GHz and 5.67-5.8GHz). The proposed MIMO antenna consists of 2x2 elements on a single FR4 substrate.The combinations of MIMO and reconfigurable antenna provide improved performance in terms of envelope correlation coefficient (ECC) and channel capacity loss (CCL) in multiple-frequency bands. The MIMO antenna system performance including the isolation, ECC, CCL, and the diversity gain (DG) are simulated and measured. High isolation (≥ 25dB) is achieved between reconfigurable MIMO antenna ports without any internal and external decou...
2014 31st National Radio Science Conference (NRSC), 2014
A quad band planar microstrip-line-fed printed circuit board (PCB) antenna for different applications is introduced in this paper. The proposed antenna can be used in mobile applications such as GSM 900 and DCS-1800. It can be also used for Bluetooth and wireless local area network (WLAN) applications at 2.4 GHz. The antenna has good characteristics at 2.3 GHz and 3.5 GHz which enable it to be used for mobile WiMAX 2.3-2.4 GHz applications and Wi-Fi 2.4-2.45 GHz applications. The antenna is built on Taconic substrate with a finite ground plane on the other side of the substrate. Simulation as well as measured results shows that the antenna has good performance in all frequency bands of operation. A reconfigurable antenna is designed and simulated using PIN switches for recent communication applications such as Cognitive radio (CR). In addition, a two-element antenna system is designed, simulated and measured for multiple-input-multiple-output (MIMO) applications.
Design and Evaluation of a Reconfigurable Antenna Array for MIMO Systems
IEEE Transactions on Antennas and Propagation, 2000
New reconfigurable antenna array is demonstrated for multiple input multiple output (MIMO) communication systems that improves link capacity in closely spaced antenna arrays. The antenna system consists of an array of two printed dipoles separated by a distance of a quarter wavelength. Each of the dipoles can be reconfigured in length using PIN diode switches. The switch configuration can be modified in a manner adaptive to changes in the environment. The configuration of switches effects the mutual coupling between the array elements, and subsequently, the radiation pattern of each antenna, leading to different degrees of pattern diversity which can be used to improve link capacity. The PIN diode-based reconfigurable antenna solution is first motivated through a capacity analysis of the antenna in a clustered MIMO channel model. A new definition of spatial correlation coefficient is introduced to include the effects of antenna mismatch and radiation efficiency when quantifying the benefit of pattern diversity. Next, the widespread applicability of the proposed technique is demonstrated, relative to conventional half wavelength printed dipoles, using computational electromagnetic simulation in an outdoor and indoor environment and field measurements in an indoor laboratory environment. It is shown for the 2 2 system considered in this paper, that an average improvement of 10% and 8% is achieved in link capacity for a signal to noise ratio (SNR) respectively of 10 dB and 20 dB in an indoor environment compared to a system employing non reconfigurable antenna arrays.