Limited Size MIMO Antenna Systems and Mutual Coupling Challenge
نویسندگان
چکیده
The wireless communication high data rate is achievable by installing more than one antenna in receiver and transmitter terminals as MIMO antenna. In order to obtain the MIMO gain (Envelope Correlation Coefficient (ECC) ≤ 0.5), the antenna elements must be at least separated by a distance of 0.5λ (λ is the operating wavelength of 0.7~3.8 GHz which is the frequency range of most of the current wireless communication applications). This value is big relative to limited sizes devices. A practical MIMO antenna should have a low signal correlation between the antenna elements and good matching features for input impedance. Moreover, MIMO system performance can be improved by reducing mutual coupling between closely spaced antenna elements. Miniature high isolated MIMO antenna system has been presented in this chapter; also many MIMO antenna systems were analyzed and categorized based on the implemented isolation techniques. Furthermore several MIMO antenna evaluation methods have been discussed. Nassrin Elamin International University of Africa, Sudan Tharek Rahman Universiti Teknologi Malaysia (UTM), Malaysia Limited Size MIMO Antenna Systems and Mutual Coupling Challenge
منابع مشابه
Antenna Selection for MIMO Systems with Closely Spaced Antennas
Physical size limitations in user equipment may force multiple antennas to be spaced closely, and this generates a considerable amount of mutual coupling between antenna elements whose effect cannot be neglected. Thus, the design and deployment of antenna selection schemes appropriate for next generation wireless standards such as 3GPP long term evolution (LTE) and LTE advanced needs to take th...
متن کاملMimo Beamforming with Mutual Coupling, Limited Feedback and Coordination
DONG, YUHAN. MIMO Beamforming with Mutual Coupling, Limited Feedback and Coordination. (Under the direction of Dr. Brian L. Hughes). Multi-input, multi-output (MIMO) techniques use multiple antennas at both the transmitter and receiver to improve the performance of wireless communications systems over multipath fading channels. In recent years, MIMO techniques that employ transmit beamforming h...
متن کاملWiMAX/MIMO Antenna using L-shaped Folded Monopole Antennas
In recent days, the Worldwide Interoperability for Microwave Access (WiMAX) technology has widely used for wireless mobile devices such as handsets, notebook PCs and so on. In addition, Multi-antenna systems for handsets such as diversity and Multiple-input Multiple-out (MIMO) applications has developed, which are seen as the potential technologies for enhancing the performance and capacity wit...
متن کاملAdaptive Impedance Matching to Compensate Mutual Coupling Effects on Compact MIMO Systems
Multiple-Input Multiple-Output (MIMO) systems promise higher data rates and better quality of service for wireless communications, by using multiple antennas at both the transmitter and receiver. However, applying MIMO technology at small portable wireless devices is faced with the problem of mutual coupling between antenna elements due to the limited space to put multiple antennas. It is shown...
متن کاملThe Capacity of MIMO Wireless Systems with Mutual Coupling
MIMO wireless systems employing antenna arrays with close inter-element spacings exhibit a high degree of mutual coupling. In this case, the channel transfer matrix is a function of the matching network employed at transmit and receive. Existing capacity expressions are inappropriate, since the maximum mutual information will depend on antenna element loading. This paper develops a new expressi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2015