By Peter S Hall, Yang Hao
Prepare for the tidal wave of "body centric" digital structures that might take cellular communications and computing to new heights! This first-of-its-kind booklet can help engineers pave the way in which with its definitive remedy of on-body antenna thought, layout and purposes. It coverers either the state of the art in latest structures including new advances resulting in scientific, own leisure, legislation enforcement, and army purposes now in improvement.
This state-of-the-art source briefs engineers on key propagation concerns after which dives into the nuts-and-bolts of antenna layout that promises the products. It covers on-body communique channels at microwave frequency and coffee frequency bands, in addition to extremely wideband structures for WPANs and WBANs. jam-packed with hands-on advice from famous specialists, this quantity could be quintessential to all engineers fascinated by designing, checking out, and enhancing body-centric verbal exchange platforms.
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Extra info for Antennas And Propagation for Body-Centric Wireless Communications
The MoM is used to model the metallic surfaces and wires of the base-station antenna, and the FEM is used to model the heterogeneous human phantom. The advantages of each of these frequency domain techniques are exploited, leading to a highly efficient and robust numerical method for addressing this type of bioelectromagnetic problem. 4 Finite Element Method The Finite Element Method (FEM) is usually formulated on a variational expression, which has a rigorous mathematical formulation in terms of convergence .
Before the measurement, the phantom has to be precut along the plane in which the SAR is to be measured. Then, after the phantom is illuminated by a radio source, the precut parts of the phantom are quickly separated, and an infrared sensor measures their surface temperature. The SAR then is derived from the temperature rise. This type of phantom is also best suited for the studies of the propagation around, as well as inside, the body, since it can accurately represent the inhomogeneous structure of the human body.
There is also a kind 24 Electromagnetic Properties and Modeling of the Human Body of diffraction that is different from GO, called creeping waves. A ray incident tangential to a curved surface sets off a creeping ray that moves along a geodesic of the surface. In , a hybrid uniform asymptotic theory of diffraction/finite difference time domain (UTD/FDTD) method was proposed to analyze human exposure in realistic urban environments for the Global System for Mobile communications (GSM) and the Universal Mobile Telecommunications System (UMTS) frequency bands.