Angular independent frequency selective surfaces for interference control in indoor wireless environments

A study of electromagnetic wave propagation in buildings using a finite-difference time-domain algorithm has demonstrated that waves are incident on walls over a wide range of angles. If wall mounted frequency selective shielding is desired, it is argued that this behaviour requires shielding solutions that are angle insensitive. A simple single-layer annular ring frequency selective surface (which is relatively economic to fabricate) is shown to offer adequate angular stability of the transmission response, and is thus suitable for electromagnetic interference control in indoor wireless environment

Physical Layer Engineering for Indoor Wireless Systems in the Twenty First Century

Deploying wireless systems so that they offer the best performance for all stakeholders (e.g. users, service providers and shareholders) is identified as a critical issue in advancing the wireless industry into the second decade of the twenty-first century. An historical perspective of the key issues is initially presented, from which a set of societal expectations of future wireless performance are derived. The engineering challenge is to meet these expectations, and this has motivated a programme of research being undertaken at the universities of Auckland and Kent. Suggestions are made as to how this research might be encapsulated in the form of a wireless Code of Practice to assist practitioners charged to provide high performance wireless functionality to users in built environments