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Planar Quadrature Coil Design Using Shielded-Loop Resonators

✍ Scribed by Anders Stensgaard

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 561 KB
Volume: 125
Category: Article
ISSN: 1090-7807
DOI: 10.1006/jmre.1996.1103

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✦ Synopsis

The shielded-loop resonator is known to have a low capacitive between the modes can be finely adjusted by tuning the sample loss due to a perfect balancing. In this paper, it is demonbalance between C 1 and C 2 . To maintain the isolation, the strated that shielded-loop technology also can be used to improve two connection points of the single loop to the center connecdesign of planar quadrature coils. Both a dual-loop circuit and tor must be at virtual ground during operation. This is rather especially a dual-mode circuit may benefit from use of shieldeddifficult to accomplish if a capacitive match circuit is used. loop resonators. Observations in measurements agree with theory In Ref. (4), two capacitive tune-and-match circuits are for both a dual-loop coil and a dual-mode coil. The coils were shown, a passive and an active circuit. Besides being rather designed for use as transmit/receive coil for 1 H imaging and speccomplicated, both circuits suffer from the problem that there troscopy at 4.7 T in rat brain.

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