file: C:\hagen\wpfiles\hfss1.wp6

HFSS - how does it work?

1. Ports are solved as extended waveguides

2. full solution is done and produces all the s parameters. Are the ports excited one at a time for this? If so, how large is the excitiation? 1V , 1v/inch,....?

Suppose one port is to be excited; the E field is there taken as e^-ikz + rho e^ikz (a wave travelling in the +z direction and a reflection. At the other ports the solution can have only outgoing waves, A'e^-ikz', A''e^-ikz", etc. The parameters to be determined are

rho, A', A", A''', etc: one complex number per port.	Supposedly there is only one set of parameters for which there is solution of Maxwell's equations.

Can the solution be calculated as progressing from the input port into the structure?