Luigi Vallozzi

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The introduction of intelligent textile systems to increase the wearer's level of protection has exposed the necessity of wearable communication tools and has led to research in textile antennas. However, most textile fabrics are quite thin (0.5 mm), making it challenging for antenna designers to provide an antenna which operates adequately and resiliently(More)
The emergence of wearable textile systems in recent years exhibited the need for wireless communication tools integratable into garments. In literature, several planar antenna designs based on textile materials have been presented, however, without an adapted feeding structure for wearable applications. An aperture-coupled patch antenna (ACPA) meets this(More)
A compact wearable antenna system, completely made out of textile materials for integration into protective garments, is proposed. The system implements combined pattern and polarization diversity to improve the quality of the communication link. The performance of the on-body antenna system, integrated into a firefighter jacket worn by a test person, was(More)
In the context of wearable textile systems for rescue workers, antennas are needed that exhibit robustness to channel fading and, in addition, are completely integrable into protective garments. Therefore, a dual polarized patch antenna, made out of textile materials, is proposed. The antenna is intended for operation in the ISM band [2.4, 2.4835] GHz,(More)
Off-body data communication for firefighters and other rescue workers is an important area of development. The communication with a moving person in an indoor environment can be very unreliable due to channel fading. In addition, when considering off-body communication by means of textile antennas, propagation is affected by shadowing caused by the human(More)
In the context of wearable textile systems for rescue workers, the knowledge of the position of the mobile operator is a crucial information for coordination of interventions. For this purpose, a textile wearable GPS antenna is required. Such an antenna must be completely integrable into a protective garment and resistent against harsh environmental(More)
The generalized polynomial chaos theory is combined with a dedicated cavity model for curved textile antennas to statistically quantify variations in the antenna's resonance frequency under randomly varying bending conditions. The nonintrusive stochastic method solves the dispersion relation for the resonance frequencies of a set of radius of curvature(More)
Indoor off-body wireless MIMO links between a mobile user equipped with wearable textile patch antennas and a fixed base station exhibit specific channel behavior due to the near presence and movements of the human body. Therefore, they require a dedicated channel model that captures the effects of correlated small-scale Rayleigh fading and correlated(More)
This paper introduces a novel formalism to improve the performance of an off-body system by deploying multiple ultra wideband (UWB) antennas, positioned strategically on the body. A methodology is presented for determining the optimal positions of UWB antennas on the body, necessary to provide a reliable multiband orthogonal frequency division multiplexing(More)
In the context of wearable textile systems, antennas are needed that exploit diversity and exhibit robustness to harsh environmental conditions. A novel dual-polarized, textile patch antenna, on a fire-retardant and water-repellent substrate, was designed and realized. Extensive performance measurements and simulations in open-space and on-body situations(More)