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%?????3-D?FDTD?code?with?PEC?boundaries
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%?????Program?author:?Susan?C.?Hagness
%?????????????????????Department?of?Electrical?and?Computer?Engineering
%?????????????????????University?of?Wisconsin-Madison
%?????????????????????1415?Engineering?Drive
%?????????????????????Madison?WI?53706-1691
%?????????????????????608-265-5739
%?????????????????????hagness@engr.wisc.edu
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%?????Date?of?this?version:??February?2000
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%?????This?MATLAB?M-file?implements?the?finite-difference?time-domain
%?????solution?of?Maxwell‘s?curl?equations?over?a?three-dimensional
%?????Cartesian?space?lattice?comprised?of?uniform?cubic?grid?cells.
%?????
%?????To?illustrate?the?algorithm?an?air-filled?rectangular?cavity?
%?????resonator?（充氣矩形空腔諧振器）?is?modeled.??The?length?width?and?height?of?the?
%?????cavity?are?10.0?cm?（x-direction）?4.8?cm?（y