Hello, I'm having trouble whenever I run my program I'm getting this error "ERROR: Unbound variable: D-conductivity" when I deleted everything related to D-conductivity in my program it was running fine. Can you help me how to represent this term in Meep (I used the formula provided in meep references to calculate this term). Here is the program and I appreciate your help:
(reset-meep) ;The dielectric parameters (define-param seps 41.4) ;skin permittivity,epsilon,at 900 MHz (define-param feps 5.5) ;fat permittivity,epsilon,at 900 MHz (define-param meps 56.9) ;muscle permittivity,epsilon,at 900 MHz (define-param sseg 7.916796) ;skin D-conductivity, segma, at 900 MHz (define-param fseg 3.493) ;fat D-conductivity, segma, at 900 MHz (define-param mseg 6.62092) ;muscle D-conductivity, segma, at 900 MHz ;the cell dimentions (define-param sw .002) ; Skin thickness (define-param fw .03) ; fat thickness (define-param mw .03) ; muscle thickness (define-param dpml .1) ; PML layer thickness (define-param sx .2) ; size of cell in x direction (define-param sy .2) ; size of cell in y direction (set! geometry-lattice (make lattice (size sx sy no-size))) (set! geometry (append (list (make block(center 0 0.001)(size infinity sw infinity) (material(make dielectric (epsilon seps) (D-conductivity sseg)))) (make block (center 0 0.017) (size infinity fw infinity) (material (make dielectric (epsilon feps) (D-conductivity fseg)))) (make block (center 0 0.047) (size infinity mw infinity) (material (make dielectric (epsilon meps) (D-conductivity mseg))))))) (set! sources (list (make source(src (make continuous-src (wavelength .255))) (component Ez) (center 0 0.001) (size 0 0.002)))) (set! pml-layers (list (make pml (thickness dpml)))) (set! resolution 10) (run-until 200 (at-beginning output-epsilon) (at-end output-efield-z))
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