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Research to quantify the attenuation of 150 GHz and 300 GHz EM waves in sand has been conducted and the results are presented in this paper to investigate the performance of low-THz sensing for outdoor applications when an antenna radome might be contaminated by sand, which is one of the most common types of contaminant in outdoor environments. The signal power deviation has been studied as a function...
Monostatic and bistatic reflections of different commercial absorbers and also floor carpets have been measured at 300 GHz and presented in this paper. Monostatic reflection measurements have been done over the angular range of 50° to 130° and bistatic reflection measurements have been done over the angular range of 0° to 50°. The lowest reflectivity was achieved from wool carpet with median reflectivity...
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...
In this paper, a concurrent dual-band class-E power amplifier is proposed. A distributed matching network is designed without any switch to achieve dual-mode operation. The power amplifier works in the 777–787 MHz and 1710–1785 MHz bands for LTE system. The measured results show 22 and 27 dBm output power at first and second band, respectively. This power amplifier obtains efficiency of 60% in lower...
In this paper, a concurrent dual-band class-E power amplifier is proposed. A distributed matching network is designed without any switch to achieve dual-mode operation. The power amplifier works in the 777–787 MHz and 1710–1785 MHz bands for LTE system. The measured results show 22 and 27 dBm output power at first and second band, respectively. This power amplifier obtains efficiency of 60% in lower...
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