Wan Khairuddin bin Wan Ali, Ir. Dr.

This paper was written in 1998 as part of my research finding. It was published in Antennas and Propagation Society International Symposium, 1998. IEEE. At first I used the theory to help me simplified the design and analysis of multi-layered microwave antennas. Never that I though it will be used in microwave circuit design. Nevertheless I am glad to see so many microwave engineers have using it, even at 60GHz.