Near field resolution measurements with the leaky wave antennas

N-path filters exploiting switched-series-R-C networks can realize high-Q blocking-tolerant band-pass filters. Moreover, their center frequency is flexibly programmable by a digital clock. Unfortunately, the time variant nature of these circuits also results in unwanted signal folding. This paper proves analytically that folding can be reduced...

Detection of IEDs with leaky wave antennas

A novel leaky wave antenna with ultrawide band radiation and high fidelity (low dispersivity) is presented. The suitability of this antenna for a hand-held GPR is evaluated through measurements in a quasi-monostatic setup of an antipersonnel mine and an anti-tank IED-like object buried in dry sand. © 2015 IEEE.

Dielectric characterisation of human tissue samples

The electrical properties of tissues samples are required for investigation and simulation purposes in biomedical applications of EM sensors. While available open literature mostly deals with ex-vivo characterization of isolated tissues, knowledge on dielectric properties of these tissues in their original environment is essential for an...

A ultrawideband leaky slot antenna for microwave radar imaging

This paper presents a novel ultra wide band (UWB) leaky slot antenna. The antenna has a wide impedance bandwidth from 3 to 14 GHz and it is suitable for radar applications requiring high resolution, phase center stability and good pulse preservation, such as medical imaging and ground penetrating radar. © 2013 EurAAP.

Frequency-Selective Surface to Prevent Interference Between Radar and SATCOM Antennas

Interference between neighboring antennas operating in nearby frequency ranges can lead to damage of the front-end electronics. This letter presents the design of a frequency-selective surface (FSS) aimed at preventing the saturation of the low noise amplifiers of a phased-array radar antenna due to the carrier of a satellite communication...

FMCW radar for life-sign detection

In this paper we investigate the use of Frequency Modulated Continuous Wave (FMCW) radars for detecting life-sign of people, i.e. breathing and heartbeat. An optimum frequency has been selected to observe life-sign, taking into consideration also design factors, such as bandwidth availability and interference with other systems. A new compact X...