The core focus of Mark’s research is the application of multi-element antenna systems (also known as Multiple-Input Multiple-Output (MIMO) or Smart Antennas) to enhance the performance of wireless systems in terms of higher data rates, whilst conserving both bandwidth and power. Fundamental to the successful design and deployment of such systems is an in-depth understanding of the multi-dimensional wireless channel necessitating joint characterisation of both the antenna elements and the propagation medium.