zlem Ipek1,
Alexander J.R. Raaijmakers1, Jan J. Lagendijk1,
Cornelis A.T van den Berg1
1Radiotherapy and Radiology, UMC Utrecht,
Utrecht, Netherlands
A
novel radiative surface antenna consists of two copper strips placed on a
dielectric rectangular substrate. It is investigated by means of
electromagnetic modeling of the substrate material and the conductor
dimensions in terms of impedance matching, effective B1+ delivery at depth
and low local SAR. Such antenna design requires that its Poynting vector is
directed into the target location and a dielectric substrate that ensures
impedance matching at the antenna-body interface. When the dielectric constant
of substrate is matched to that of the phantom, the radiative antenna is
matched to 50 Ohm, thus its radiation efficiency is the highest.