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This paper investigates signal reduction due to contamination of low-THz radar radomes for outdoor applications. A measurement methodology is proposed to characterise the effect of different obscurants on electromagnetic wave propagation. This is achieved by measuring the ratio of two signals: one reflected from the reference target through the contaminated radome and another through the radome without...
Intensive research and development activity on low-terahertz (0.1–1 THz) electronics, including recent advances in monolithic microwave integrated circuit (MMIC) fabrication, indicate that THz radar might become feasible in the coming decade, at a reasonable cost. Low-THz radar sensors are promising short range sensing for mobile robotics, automotive industry and avionics industries. Physically small...
Recently, a new approach, called injection matching theory (IMT), for realizing Electrically Small Antennas (ESA) was reported. This approach was validated by means of port matching improvement through the measurements in an earlier publication. This contribution considers the radiated power from an injection matched antenna. Measurements demonstrate that injection matching significantly improves...
Measurements of on-body dynamic propagation channels have been performed at 60 GHz using dual-polarized scalar horns. The measured cumulative distribution functions (CDF) were compared to those reported previously with monopole antennas. The performances of horn and monopole antennas were compared in various on-body channels and it was found that omnidirectional low-gain antennas produce stronger...
The millimetre-wave band provides a few important advantages for body-centric communications. First of all, efficient high-gain antennas can be made sufficiently small to fit in small portable devices which can be worn on the body. Secondly, much more license-free bandwidth is available in this frequency band and, therefore, data transfers can be much faster. This allows for quick transfer of video...
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