#### sanders

##### Member level 3

(1) how to excite two ports at the same time in hfss, what can i do to realize it?

(2) how to set high-resistivity line or plane?assign it impedance boundary?

more quations:

(1) a paper mentioned: sheet resistence is around Rs=10κΩ/sq and each resistive line was designed to be at least 20 squares long. my question is how long a square is ? a square=(? )m.

(2) "the bias line conclude in dc pads of 150 and 400 pitch", so what is pitch?

(3) the loss tangent of high-resistivity Si?

That is all, any help will be appreciated!