線極化波電場(chǎng)矢量端點(diǎn)隨時(shí)間的變化

w=1;

k=1;

Exm=10;

Eym=10;%定義初始變量

t=linspace(0,1.e-6,1000);%時(shí)間及步長(zhǎng)設(shè)置

z=linspace(0,10*2*pi/k,1000);%空間及步長(zhǎng)設(shè)置

Ex=Exm*cos(w*t-k*z);

Ey=Eym*cos(w*t-k*z);

comet(Ex,Ey,0.1);%隨時(shí)間變化軌跡

hold on;

figure;

comet3(Ex,Ey,z);%隨傳播方向變化軌跡

園極化波電場(chǎng)矢量端點(diǎn)隨時(shí)間的變化

w=1.5*pi*(10e+8);

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z=0:0.05:20;

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k=120*pi;

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for t=linspace(0,1*pi*10e-8,200)

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e1=sqrt(2)*cos(w*t-pi/2*z);

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e2=sqrt(2)*sin(w*t-pi/2*z);

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h1=sqrt(2)/k*cos(w*t-pi/2*z);

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h2=-sqrt(2)/k*sin(w*t-pi/2*z);

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plot3(e1,e2,z);

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xlabel('x');

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ylabel('y');

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zlabel('z');

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title('電場(chǎng)強(qiáng)度矢量');

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grid on

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end

橢圓極化波電場(chǎng)矢量端點(diǎn)隨時(shí)間的變化

Exm = 3;? % x分量幅值

Eym = 4;? % y分量幅值

w = 10; z0 = 0;

x = 0:0.01:3;?????????? % x軸坐標(biāo)取樣

m0 = zeros(size(x));??? % 與x取樣序列規(guī)模相同的0序列

Qx = 0;???????????????? %x分量初相角

Qy = pi/2;????????????? %y分量初相角 ，Qy相對(duì)于Qx的值位于 0 < Qy - Qx < pi,左旋 ，

?????????????????????? %-pi < Qy - Qx < 0 右旋

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%for t=0:500

??? Ex = Exm*cos(w*x+w*t*1e-2+Qx);? % 計(jì)算 x方向幅值瞬時(shí)序列

??? Ey = Eym*cos(w*x+w*t*1e-2+Qy);? % 計(jì)算 y 方向幅值瞬時(shí)序列

??? %plot3(x,m0,m0,'black','LineWidth',3); %畫 參考軸線

??? %hold on

??? %plot3(x, m0, Ex,'m','LineWidth', 1.5); % 畫x軸方向分量

??? %hold on

??? %hold on

??? % 和向量y坐標(biāo)為Y分量幅值，z坐標(biāo)為X分量幅值

??? plot3(x, Ey, Ex,'g','LineWidth', 1.2);??? hold off

??? xlabel('傳播方向');

??? ylabel('電場(chǎng)Ey');

??? zlabel('電場(chǎng)Ex');

??? title(['平面電磁波傳播示意圖'],'fontsize',14)

??? set(gca,'fontsize',12)

??? drawnow

%end

線極化波電場(chǎng)矢量端點(diǎn)隨傳播空間變化的軌跡

w=1;

k=1;

Exm=10;

Eym=10;%定義初始變量

t=linspace(0,1.e-6,1000);%時(shí)間及步長(zhǎng)設(shè)置

z=linspace(0,10*2*pi/k,1000);%空間及步長(zhǎng)設(shè)置

Ex=Exm*cos(w*t-k*z);

Ey=Eym*cos(w*t-k*z);

comet(Ex,Ey,0.1);%隨時(shí)間變化軌跡

hold on;

figure;

comet3(Ex,Ey,z);%隨傳播方向變化軌跡

園極化波電場(chǎng)矢量端點(diǎn)隨傳播空間變化的軌跡

clc;clear;

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exm=1;

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eym=1;

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faix=0;

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faiy=pi/2;

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wt=0:.001:10;

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kz=0;

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plot(exm*cos(wt-kz+faix),eym*cos(wt-kz+faiy));

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axis([-1.1 1.1 -1.1 1.1]);

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xlabel('Ex');

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ylabel('Ey');

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axis equal;

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grid on;

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title('固定位置圓極化波矢端軌跡')

橢圓極化波電場(chǎng)矢量端點(diǎn)隨傳播空間變化的軌跡

Exm = 3;? % x分量幅值

Eym = 4;? % y分量幅值

w = 10; z0 = 0;

x = 0:0.01:3;?????????? % x軸坐標(biāo)取樣

m0 = zeros(size(x));??? % 與x取樣序列規(guī)模相同的0序列

Qx = 0;???????????????? %x分量初相角

Qy = pi/2;????????????? %y分量初相角 ，Qy相對(duì)于Qx的值位于 0 < Qy - Qx < pi,左旋 ，

?????????????????????? %-pi < Qy - Qx < 0 右旋

?

%for t=0:500

??? Ex = Exm*cos(w*x+w*t*1e-2+Qx);? % 計(jì)算 x方向幅值瞬時(shí)序列

??? Ey = Eym*cos(w*x+w*t*1e-2+Qy);? % 計(jì)算 y 方向幅值瞬時(shí)序列

??? %plot3(x,m0,m0,'black','LineWidth',3); %畫 參考軸線

??? %hold on

? ??%plot3(x, m0, Ex,'m','LineWidth', 1.5); % 畫x軸方向分量

??? %hold on

??? %hold on

??? % 和向量y坐標(biāo)為Y分量幅值，z坐標(biāo)為X分量幅值

??? plot(Ex, Ey);??? %hold off

??? xlabel('傳播方向');

??? ylabel('電場(chǎng)Ey');

??? zlabel('電場(chǎng)Ex');

??? title(['平面電磁波傳播示意圖'],'fontsize',14)

??? set(gca,'fontsize',12)

??? drawnow

%end