Archive for August, 2008

Thursday, August 14th, 2008

HFSS Calculating incorrect Impedances…

I have been running some Ansoft HFSS simulations of infinite arrays of antennas, recently.  A peculiar thing I noticed is that some of the impedance data, which is calculated from the S-parameter matrices, had sizable spikes (upwards of 300Ohms) inside a frequency band that, from the S-parameters, looked smooth and well matched.  Clearly something was [...]

No Comments » - Posted in Antennas,Electromagnetics,Grad School,Mathematics by