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zdzhang

ľ³æ (ÕýʽдÊÖ)

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¸÷λǰ±²ºÃ£¬ÎÒÏëͨ¹ý½âÕâÑùÒ»¸ö¸´Êý·½³Ì£¬µÃµ½k_zµÄÖµ£¬µ«ÊÇÎÒÕâÑù±àдµÄ³ÌÐò£¬×ÜÊdzö´í£¬ÄÄλ´óÏÀÄܰïÎÒ¿´¿´ÊÇÄǸöµØ·½³ö´íÁËÄØ£¿Íû°ïæÐÞ¸Äһϣ¬ÏÈл¹ý¸÷λÁË£¡
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clc;
clear;
syms k_z
i=sqrt(-1);
a=60*10^(-9);
mu_air=4*pi*10^(-7);
epsl_air=8.854187817e-12;
epsl_met=-18.36+0.46i;
c=3.0*10^8;
wavelength=632.8*10^(-9);
k_0=2*pi/wavelength;

f=@(k_z) (-epsl_met*k_0^2*(8-(epsl_met*k_0^2-k_z^2)^(0.5)*a))/16*(1-0.25*(epsl_met*k_0^2-k_z^2)*a^2)+mu_air*epsl_air*k_0^2/((mu_air*epsl_air*k_0^2-k_z^2)*a^2*log(1.1229/(mu_air*epsl_air*k_0^2-k_z^2)^(0.5)*a))
ferror=1e-5;
k_z1=(0.95+0.0008*i)*k_0;
k_z2=(1.2+0.005*i)*k_0;
fplot(f,[k_z1,k_z2])
xlabel('k_z')
ylabel('f(k_z)')
hold on
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
k_z0=(k_z1+k_z2)/2;
while abs(f(k_z0))>ferror
    plot(k_z0,f(k_z0),'+')
    if f(k_z1)*f(k_z0)>0
        k_z1=k_z0;
    else
        k_z2=k_z0;
    end
    k_z0=(k_z1+k_z2)/2;
end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
format short
disp('[           k_z0            f(k_z0)')
disp([k_z0 f(k_z0)])
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[ Last edited by zdzhang on 2011-11-16 at 17:29 ]
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wangyuewu08

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zdzhang(½ð±Ò+2): 2011-12-06 09:32:03
zdzhang(½ð±Ò+2): 2011-12-06 13:23:44
xiegangmai(½ð±Ò+1): ллӦÖú£¡ 2011-12-06 22:18:21
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wangyuewu08

ľ³æ (ÖøÃûдÊÖ)

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xiegangmai(½ð±Ò+2): лл²ÎÓ룡 2011-12-07 18:38:22
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wangyuewu08

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4Â¥2011-12-07 18:38:37
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zdzhang

ľ³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
4Â¥: Originally posted by wangyuewu08 at 2011-12-07 18:38:37:
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5Â¥2011-12-08 09:33:19
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wxliu1992

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