Circularly polarized transceiver for magnetic resonance imaging
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United States of America Patent
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Jan 30, 2018
Grant Date -
Sep 10, 2015
app pub date -
Mar 10, 2015
filing date -
Mar 10, 2014
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Abstract
A patch resonator for nuclear magnetic resonance device includes a ground plane, a conductive element, a dielectric element positioned between the ground plane and the conductive element, the resonator being able to transmit a circularly polarized radiofrequency signal when the resonator is supplied by a first transmission line connected to the conductive element via a first connection point and able to receive alternatively a radiofrequency signal circularly polarized in the opposite direction when the resonator is connected to a second transmission line via a second connection point, the resonator including a switch mounted in parallel on each transmission line at a distance from the ground plane corresponding to (2n+1)λ/4 with n a natural integer, and λ the wavelength of the guided wave in the transmission line at the operating frequency of the resonator, the switch making it possible to electrically connect/disconnect the transmission lines from the conductive element.
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