一維fdtd模擬程序C語言

1、#include H-.88 #include j53Td. #include wwHV;i PKM8MY vo #define NUM_of_ZAXIS 400 nE3m) 2U;ImC1g float gauss_pulse(float T,float t0,float spread); IZkQmA= L: ;L/ int file_save(float* data,char* filename); m:7$oq| ,!s;o6|*y sSMcF2I WU -_Y void main() _8CE|Cn (hn+hc float exNUM_of_ZAXIS,hyNUM_of_ZAXIS

2、; O!D0 hW4 float obj_parametersNUM_of_ZAXIS4;/*模型參數(shù)設(shè)置 */ ng,qEI;Z ?X1vU0 c float dt,ddz; %8)GuxG* float source,T; 4|ryt4B int pos_driv_source; P| o_/BS int i,n,Nsteps; |_/i/H int e_low,e_high; ZqHh$QBD 9 HG2iy Vu DSjh 4+t9SD FILE* fp; #:Bd8PS 4#$gTc NGD?. (G /*初始化各個變量 */ 83dwr;- Pi=3.14159; / c1=OJ

3、Epsilon=8.85e-12; =U sl Mu=4*Pi*1e-7; NPws uFDJRQJ var_cb=dt/Epsilon; lP*_dt9 var_cp=0.5*h_sigma*dt/Mu; okfGd= & var_cq=dt/Mu; :_;9&H9ha hsIC5s3 ca=(1-var_ca)/(1+var_ca); 4.|-?qG cb=var_cb/(1+var_ca); sWw cp=(1-var_cp)/(1+var_cp); #9aB3C cq=var_cq/(1+var_cp); 07WZ w1(; 4.)hCb var_border=(C*dt-ddz)/(

4、C*dt+ddz); /i;/$ o ex_high_m1=0; :7 .a._WZF ex_low_s1=0; =ML6jr ex_low_s2=0; 4naL2 Y! ex_high_s1=0; z(14250 ex_high_s2=0; 6.? Ke8iC 8z&7wO / 上 ，下 邊界位置 S#+Dfa8X e_low=20; p%) 1(R8qM e_high=380; RRh0G* k.nq, pos_driv_source=200; FHpS?htRy ihCa $ +92/0 for(i=0;iNUM_of_ZAXIS;i+) sE87Lz pyA;%vJn ex=0; tr

5、8a_CV hy=0; pv$ o obj_parameters0=1; ETk4I obj_parameters1=1; 0) u#,#z_ /2 V printf(Nsteps-); nPlg5&E scanf(%d,&Nsteps); fc,LFvZ +5AWX,9,- for(n=0;nNsteps;n+) jL3/0o .W;,.l T+=1; d v8q&_ P*=M?:Jb, / 計算 Ex Fa |Y for(i=e_low+1;ie_high;i+) iXtL:,i x:wv#Wh:l7 / 采用葛德彪書中的一維FDTD 公式 TR7j? ex=CA*ex-CB*(hy-hy

6、i-1)/ddz; 5t=7- 7XM:4whw $ kAal26z if(T200) b8FSVV 7 obzdH:S expos_driv_source+=gauss_pulse(T,40,12); K;L6a A# $K12Wcp- Xtk3 b)(si/ TxA%0 /Mur 邊界吸收 OCN: 52P0T 7X$+S ex_low_s2=ex_low_s1; Q$)z_jai ex_low_s1=exe_low+1; 0Qr|!B:+9) 36QZV*P ex_high_m2=ex_high_m1; 1$n! Lj=5 ex_high_m1=exe_high; n2N:rP &BOG

7、&ot ex_high_s2=ex_high_s1; ,O|#?G ex_high_s1=exe_high-1; 0RF:9x2 fq(3uEnC 2 #_ i_j exe_low=ex_low_s2+var_border*(exe_low+1-ex_low_m2); HV*=Qi exe_high=ex_high_s2+var_border*(exe_high-1-ex_high_m2); -TgA*_5 MTkrv(G /行波時延法 mNQ*YCq. /exe_high=0.5*(ex_high_m2+ex_high_s2); Ps7cl /exe_low=0.5*(ex_low_m2+ex_low_s2); (iB+c +3K)9H / 計算 Hy t+z r3 ;|D8D6 for(i=e_low;ie_high;i+) 2 X5YN; e$4$G / 存儲數(shù)據(jù) 95-ptO1 (6 e$j fp=fopen(Ex,w); V38v2LI for(i=0;iUl0&Mf? fclose(fp); vw /X PtT$#hx fp=fopen(Hy,w); kz?m 1 for(i=0;i= Mg8 3kS M*#UV2 float gauss_pulse(float T,float t0,float spread)