Muitiple-scattering approach to finite-sized photonic band-gap materials

Multiple-scattering theory is used to study the transmission, scattering, and radiation properties of finite-sized photonic band-gap materials in two dimensions. By adopting a source with a finite beam width to simulate realistic experimental conditions, we are able to obtain transmission results that are in excellent quantitative agreements with the measured data. Also, we find that the apparent gaps seen by an antenna can be much larger than the full gaps of the system. Inside an apparent gap, analytic results have been obtained for the radiation patterns and the total radiation power. [S0163-1829(98)00139-8].