Zobrazeno 1 - 10
of 235
pro vyhledávání: '"Anand Gopinath"'
Publikováno v:
IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology. 3:33-40
The objective is to develop a highly efficient RF head coil on a thin substrate for the ultra-high magnetic field MRI systems. The metamaterial zeroth-order resonator is investigated for this purpose. Simulation and experimental results are provided
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7083a5b089870985ba9a844aceba44c
https://doi.org/10.1109/jerm.2019.2893546
https://doi.org/10.1109/jerm.2019.2893546
Publikováno v:
2021 15th European Conference on Antennas and Propagation (EuCAP).
Beam steering which is achieved conventionally using phase shifters can also be achieved by using attenuators in the feed network in Amplitude Steerable arrays. These attenuators provide the necessary weights to the signals entering the antenna eleme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7d1cd65c9f098a143e92d95a49a5cfd
https://doi.org/10.23919/eucap51087.2021.9411388
https://doi.org/10.23919/eucap51087.2021.9411388
Publikováno v:
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting.
Designing beam steerable arrays with amplitude as the main parameter instead of phase as in the conventional arrays brings with it its own set of challenges: earlier occurrence of grating lobes and mutual coupling. An overview of these two issues alo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5373295643f8f118e893cea745b98314
https://doi.org/10.1109/ieeeconf35879.2020.9330050
https://doi.org/10.1109/ieeeconf35879.2020.9330050
Publikováno v:
2019 IEEE International Symposium on Phased Array System & Technology (PAST).
Traditional methods of beam steering of antennas have used phase as the primary variable. The intent of this research work is to revisit the idea of using amplitude rather than phase or mechanical motion to steer the beam and explore it as a possibil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5d536de04c4ddf50958fd8fca0bc1d2
https://doi.org/10.1109/past43306.2019.9020808
https://doi.org/10.1109/past43306.2019.9020808
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 64:3217-3223
A coupler is an indispensable component to sample the forward and reflected power for the real-time radio frequency (RF) power monitoring system. The directivity of a coupler is a critical factor to achieve accurate RF power measurements. This paper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d6ed1251c79d38140cde74aaae15841
https://doi.org/10.1109/tmtt.2016.2602835
https://doi.org/10.1109/tmtt.2016.2602835
Autor:
Anand Gopinath
Publikováno v:
Theory and Applications of Heat Transfer in Humans
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::508c5196960e44a64cdd9998f8cca249
https://doi.org/10.1002/9781119127420.ch19
https://doi.org/10.1002/9781119127420.ch19
Publikováno v:
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting.
A metamaterial based microstrip loop element is proposed for the ultra-high magnetic field MRI body coils. The advantage of the leaky wave broadside radiation capability of the metamaterials is utilized. A 12 cm by 12 cm square loop simulated at 447
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fd48f9061786437abd7f52cae86d018
https://doi.org/10.1109/apusncursinrsm.2017.8072546
https://doi.org/10.1109/apusncursinrsm.2017.8072546
Publikováno v:
2017 First IEEE MTT-S International Microwave Bio Conference (IMBIOC).
An optimized Metamaterial line resonator element for a Metamaterial imaging RF coil is developed for the ultrahigh field MRI systems. The coil element performance is compared to that of the transmission line (microstrip) [1] and the dipole [2,5] coil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de08de29f3498757c3dc08baac3f9adf
https://doi.org/10.1109/imbioc.2017.7965771
https://doi.org/10.1109/imbioc.2017.7965771
Publikováno v:
Journal of Electromagnetic Waves and Applications. 27:1521-1524
In high-field magnetic resonance imaging systems, parallel excitation with a multi-channel transmitter and receiver has been widely investigated to mitigate inhomogeneity. Multi-channel RF coils employed in the parallel imaging may alleviate the non-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9467c4db69f9a17e35964a3ad325b3fa
https://doi.org/10.1080/09205071.2013.817958
https://doi.org/10.1080/09205071.2013.817958
Publikováno v:
IEEE Transactions on Biomedical Engineering. 59:3365-3371
In high-field magnetic resonance imaging (MRI) systems, B0 fields of 7 and 9.4 T, the RF field shows greater inhomogeneity compared to clinical MRI systems with B0 fields of 1.5 and 3.0 T. In multichannel RF coils, the magnitude and phase of the inpu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::847638ae0ff6b9c20d3fd4a4ea57ea64
https://doi.org/10.1109/tbme.2012.2208965
https://doi.org/10.1109/tbme.2012.2208965