Antenna-independent capacity bound of electromagnetic channels

Studies of wireless multiple-input multiple-output (MIMO) channel capacity generally treat the channel as a propagation environment coupled with an antenna array. However, it is well known that altering antenna properties can have a dramatic impact on the MIMO performance. This motivates definition of a capacity bound that depends only on the propagation environment and is independent of the antenna. geometry. This paper provides a framework for formulating this capacity, and demonstrates its behavior for several representative scenarios.