Cracks, the important factor of structure failure, reflect structural damage directly. Thus, it is significant to realize distributed, real-time crack monitoring. To overcome the shortages of traditional crack detectors, such as the inconvenience of installation, vulnerability, and low measurement range, etc., an improved topology-based cable sensor with a shallow helical groove on the outside ...

The application of electromagnetic methods in the radar and micro-wave frequency band allows the fluid content of soils to be estimated; the heuristic or physically-based models permit to relate the observed electrical permittivity of the soils with the porosity and fluid saturation. The role of the effect of the free water and bound water in the overall electromagnetic behaviour of soils is di...

Very fast transients due to micro-gap discharges as low voltage electrostatic discharges (ESDs) were investigated in time domain. We previously developed a 12GHz wideband measurement setup consisting of a distributed constant system, while the observed transients due to micro-gap discharges had very fast rise time of 34 ps or less, which reached the limitation on our system. In this paper, we p...

In this paper, a new method for designing an active dual-band dipole antenna is proposed. The operating frequencies of the proposed antenna are 150 and 450 MHz that are usually used in military applications. Using a series stub is the main idea in the proposed dual-band antenna, where it makes an independent resonance frequency higher than the main resonance frequency of a conventional dipole. ...

The purpose of this study was to develop a standard 0.014-inch intravascular magnetic resonance imaging guidewire (MRIG), a coaxial cable with an extension of the inner conductor, specifically designed for use in the small vessels. After a theoretical analysis, the 0.014-inch MRIG was built by plating/cladding highly electrically conductive materials, silver or gold, over the inside and outside...

In our daily life, inadvertent scratching may increase the severity of skin diseases (such as atopic dermatitis etc.). However, people rarely pay attention to this matter, so the known measurement behaviour of the movement is also very little. Nevertheless, the behaviour and frequency of scratching represent the degree of itching, and the analysis of scratching frequency is helpful to the docto...

An Analytical calculation of the primary parameters, resistance and inductance especially, has been established in the case where both the skin effect and the linearly varying temperature along the coaxial transmission line are taken into account. The mathematical formulations are derived by first calculating the total resistance and inductance of the coaxial cable conductors within which the e...

Most wireless communication techniques rely on broadcast media on the physical layer, i.e., the actual signal can be received by any party in a certain coverage area. Furthermore, there are cable-based networks, such as HFC (hybrid fiber/coaxial) networks that use a shared transmission medium (coaxial cable) to bridge the last mile. A common means to perform secure unicast (point-to-point) comm...