Title :
Near-Field Focusing of a Fast Electromagnetic Pulse
Author :
Shu Xiao ; Camp, Tracy ; Kolb, Juergen F. ; Schoenbach, Karl H.
Author_Institution :
Old Dominion Univ., Norfolk
Abstract :
A new domain of pulsed electric field interactions with cell structures has been opened by using subnanosecond pulses, which are much less than the membrane charging time, allowing a direct electrical field-inner cell molecule interaction. This ultrashort pulse (rising 100 or so ps) also provides a possibility of guiding the energy into the deeper layers of biological targets nonintrusively. We are developing a wideband pulse system for focusing in the near field. This system has a spheroidal reflector with two focal points. A spherical TEM wave is launched in a rotationally symmetric structure towards the reflector from the first focal point by using a biconical radiator. Design issues like optimization of the reflector, biconical structure, feeding impedance and possible measurements will be presented.
Keywords :
bioelectric phenomena; biological techniques; biomagnetism; biomembranes; cellular biophysics; electromagnetic pulse; molecular biophysics; biconical radiator; biological targets; cell structures; electrical field-inner cell molecule interaction; electromagnetic pulse; feeding impedance; field at the second focus using the configuration in [2-3]; membrane charging time; near-field focusing; pulsed electric field interactions; spherical TEM wave; spheroidal reflector; subnanosecond pulses; wideband pulse system; Bioelectric phenomena; Biomembranes; Biosensors; Design optimization; Dispersion; EMP radiation effects; Electromagnetic fields; Spatial resolution; Surface waves; Wideband;
Conference_Titel :
Plasma Science, 2007. ICOPS 2007. IEEE 34th International Conference on
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0915-0
DOI :
10.1109/PPPS.2007.4345820
