Patent ID: 8164336

Claim:
An RF probe formed on opposite surfaces of a flexible dielectric substrate, wherein the substrate is then deformed to form a substantially cylindrical coilform, said probe comprising: a) a coil formed by electrically conductive metallization or other conductive material disposed on an upper surface of the flexible dielectric substrate, wherein said coil is comprised of two winding portions, and wherein said winding portions are connected by a linking conductor, and wherein each of said winding portions is comprised of a plurality of concentric loops; b) an additional electrically conductive layer or area disposed on a lower surface of said flexible dielectric substrate, such that a capacitance is formed across said flexible dielectric substrate, said capacitance acting in combination with the inductance of said coil to substantially form a transmission line, c) electrically conductive connecting means for coupling electrical signals to or from said coil and said additional conductor to an external apparatus, wherein the impedance of the RF probe across a broad frequency range of interest is substantially constant, and wherein the probe generates or detects radio frequency electromagnetic radiation in a transverse direction to the longitudinal axis of the cylindrical coilform.