We present a new coaxial antenna for microwave interstitial coagulative therapy, working at 2450 MHz and endowed with a miniaturized sleeve choke in order to reduce back heating effects and make the system response less dependent on the antenna insertion depth into the tissue; the way the choke is implemented makes the overall transversal size minimum and allows small adjustments of the choke section length even during operation. We describe the main technical features of the antenna and show experimental results clearly proving the choke effectiveness. Numerical simulations well agree with experimental data, confirming the suitability of the proposed device for minimally invasive medical applications.
This paper presents a recently built passive radar demonstrator, called the Software-defined Multiband Array Passive Radar (SMARP). This work has been conceived in the framework of the Italian National Plan for Military Research. The system is able to detect and track targets by exploiting DVB-T and UMTS transmitters. The system concept and the results are presented in this paper
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