Meeting Banner
Abstract #4434

Design of a passive feed network to increase the transmit efficiency of dipoles at 7 Tesla

Irena Zivkovic1, Thomas O'Reilly1, Wyger Brink1, and Andrew Webb1

1Radiology Department, C.J. Gorter Center for High Field MRI, Leiden University Medical Center, Leiden, Netherlands

In this abstract, we presented a new way of feeding a dipole type antenna which increases the transmit efficiency (B1+ per square root maximum SAR). The main radiating antenna element was printed on one side of a dielectric substrate with capacitive coupling to a shorter straight dipole element used as the feed element printed on the opposite side. Indirectly (passively) and directly fed (conventional) meander antennas were fabricated and their performances were compared numerically and experimentally. The indirectly fed dipole antenna exhibited increase in transmit efficiency for straight and meandered dipoles.

This abstract and the presentation materials are available to members only; a login is required.

Join Here