Metamaterial Inspired Antenna Miniaturization technique for MIMO Antenna System Applications

Metamaterial Inspired Antenna Miniaturization technique for MIMO Antenna System ApplicationsOutlineMIMO SystemsAntenna MiniaturizationMetamaterial Inspired TechniquesCSRR + Patch resultsFurther WorkMIMO SystemsIn wireless communication, MIMO (multiple-input-multiple-output) system has multiple antenna at both receiver and transmitter end to improve communication

MIMO systems are important part of all modern wireless communication standards e.g. 4G, IEEE 802.11n etc.

Progress in MIMO systems has promoted research in diverse fields e.g. channel modeling, information theory and coding, signal processing, antenna design etc.

Mobile experts have predicts the use of MIMO technology in 500 million PCs, tablets, and smartphones by 2016. *

* http://mobile-experts.net/product_info.php?products_id=46MIMO SystemsMIMO antenna system are required for devices using MIMO communicationThe size limitation of devices require that MIMO antenna system should be small, thus antenna miniaturization techniques are required.Closely placed multiple antenna elements also have significant coupling resulting in a degradation of MIMO system performanceMIMO antenna therefore requires;Miniaturized antenna elementsHigh isolation between closely spaced elements

Antenna MiniaturizationSome of the fundamental work on electrically small antenna (ESA) was done by Wheeler(1947), Chu(1948), Harrington (1960) and Collin (1964)Wheeler noted that while other electronic components in wireless communication devices were getting smaller and digital, antenna retained its property of being immune to miniaturization and digitizationInitial work evaluated ESA using circuit models and provided a fundamental lower limit of Q that can be achieved for ESA

Antenna MiniaturizationDifferent techniques exists in literatureMaterial useReactive loadingAntenna geometry & ShapingUse of EBG structuresUse of Metamaterial for miniaturizationOptimization methods

Metamaterial TechniquesClassified as Metamaterial Based AntennaAntenna made of ideal homogenized metamaterials

Metamaterial Inspired AntennaAntenna obtained by applying the metamaterial concepts

Metamaterial Inspired TechniqueUse of SRR

Use of CSRR

CSRR Loaded Patch AntennaUsed for miniaturization76% miniaturization achieved in 2.4 GHz band85% miniaturization achieved in 750 MHz band

Things to doEquivalent circuit modeling for better insight into the design and comparison with the fundamental limits of Q Characteristic mode analysis (CMA) of the antenna to optimize design and to come up with some design methodologyCMA and circuit model to look for possible multiband operationClear comparison with other miniaturization techniques, metamaterial antennas