A Review on Mutual Coupling in Antenna Arrays and Decoupling Methods in MRI Antenna Arrays

C.R, Lakshmi.

doi:10.9790/3021-031234649

IOSRJEN

2013

DOI: 10.9790/3021-031234649

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A Review on Mutual Coupling in Antenna Arrays and Decoupling Methods in MRI Antenna Arrays

Lakshmi. C.R¹

Abstract: Abstract:-Antenna arrays plays an important role in improving various characteristics of antenna arrays.The mutual coupling between antenna arrays is an undesirable effect which degrades the performance of many array signal processing algorithm. Many compensation techniques have been proposed to overcome such effects. The effectiveness of various methods largely depends on applications in which arrays were implemented. This paper mainly focus on a review on various papers involving mutual coupling and decoupli… Show more

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2019

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Monopole antenna array design for 3 T and 7 T magnetic resonance imaging

et al. 2019

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Purpose Ultra-high field magnetic resonance imaging poses a number of challenges for robust radio frequency coil designs. A monopole antenna array can potentially overcome key limitations of birdcage coil designs and may provide a useful radio frequency coil for brain imaging. Methods Four, 8 and 12 element monopole antenna arrays were simulated using 3 T and 7T magnetic resonance imaging frequencies. For comparison, 4, 8 and 12 element birdcage coils were also simulated. Coil performance was evaluated and compared and the impact of shielding was assessed. A 4 element monopole antenna array was fabricated and bench tested. Results Comparison of the 4, 8 and 12 element designs suggest that the monopole antenna array leads to better field properties than the birdcage coil in all configurations studied: unloaded, loaded with saline and loaded using a head phantom. Improvements in field properties and homogeneity were evident at both field strengths, implying that the monopole antenna array has potential for head imaging. The monopole antenna array also appears to be more efficient than the comparable birdcage coil design. Additionally, the former is scalable via the addition of more elements whereas our results suggest that this is not the case for the latter. Bench testing results show that the monopole antenna array is well matched with the transmission line, and mutual coupling between elements is sufficiently low. Conclusion We found the monopole antenna array generated a larger field intensity than the birdcage coil design, whilst also producing a more useful magnetic resonance imaging field as measured by radio frequency field homogeneity. Our study suggests that magnetic resonance imaging of the brain can likely benefit from the use of radio frequency monopole antenna arrays.

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Monopole antenna array design for 3 T and 7 T magnetic resonance imaging

et al. 2019

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A Review on Mutual Coupling in Antenna Arrays and Decoupling Methods in MRI Antenna Arrays

Cited by 1 publication

References 16 publications

Monopole antenna array design for 3 T and 7 T magnetic resonance imaging

Monopole antenna array design for 3 T and 7 T magnetic resonance imaging

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