MATLAB仿真平面电磁波在不同媒介分界面上的入射复习课程.docx

MATLAB仿真平面电磁波在不同媒介分界面上的入射

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MATLAB仿真平面电磁波在不同媒介分界面上的入射、反射和折射

一、实验目的：
1、 进一步学习MATLAB，初步掌握GUI界面的编程。
2、 通过编程实现电磁波仿真效果图。
3、 进一步理解平面电磁波的入射、反射和折射现象
二、实验要求：
1、 以电场为例，动态演示平面电磁波的传播情况。
2、 可以任意设置媒介的介电常数和入射角。
3、 考虑金属导体和空气的分界面平面电磁波的入射、反射情况。
三、实验原理：
电磁波从一种媒质入射到第二种媒质时，分界面使一部分能量反射回第一种媒质，另一部分能量折射到第二种媒质中，反射波和折射波得大小和相位取决于分界面两侧的媒质特性、极化方向和入射角大小等，当电磁波入射到理想导体表面时，会发生全反射。这一过程中包括的主要原理有以下三点。
1、正弦平面波在媒质分界面的反射和折射规律
波对分界面的入射是任意的，但为了方便，我们假设入射面与zox面重合。波在z>0时发生入射和反射，在z<0时发生折射并令空间任意一点处 的 入 射 波、反射波和折射波场强为：

图表 1 正弦波斜入射示意图
根据在z=0的界面上电场强度的切线分量相等的边界条件，有

故必有
反射定律：
折射定律：
2、 正弦平面波对理想介质的斜入射
① 垂直极化波
垂直极化波对理想介质斜入射如图所示，由折射和反射定律，我们可以得到在任意媒质中的场强。
在第一煤质中

在第二煤质中

图表 2 垂直极化波斜入射
② 平行极化波
平行极化波对理想介质斜入射如图所示，由折射和反射定律，我们可以得到在任意媒质中的场强。
在第一煤质中

在第二煤质中

图表 3 平行极化波斜入射

3、 正弦平面波对理想导体表面的斜入射
① 垂直极化波
垂直极化波对理想导体斜入射如图所示，入射波在导体表面发生全反射，我们可以得到在任意媒质中的场强。

② 平行极化波
垂直极化波对理想导体斜入射如图所示，入射波在导体表面发生全反射，我们可以得到在任意媒质中的场强。

四、实验程序；
实验程序比较长，可参见此文件夹中的jm.m文件。（附件）
生成的界面：

五、实验总结；
这次实验总体感觉收获比较大。
首先，之前学习的MATLAB都是基于图片之类的编程，没有学习过GUI的使用。通过这次实验，我初步学习了一下GUI，算是现学现卖吧。虽然学的不是很深，但是对于基本的功能的使用应该还是可以的。
再次，对于电磁场地学习都是停留在书面作业上，通过这次实验，加深了我对电磁场传播的理解。
最后，其实如果只有我一个人，应该是很难完成这次实验的，在这期间有同学的帮忙和合作。通过这次实验，感受到合作的力量，不懂要问呐。

程序代码：

function varargout = jm(varargin)
% JM M-file for jm.fig
% JM, by itself, creates a new JM or raises the existing
% singleton*.
%
% H = JM returns the handle to a new JM or the handle to
% the existing singleton*.
%
% JM('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in JM.M with the given input arguments.
%
% JM('Property','Value',...) creates a new JM or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before jm_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to jm_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one
% instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help jm

% Last Modified by GUIDE v2.5 13-May-2011 00:01:24

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @jm_OpeningFcn, ...
'gui_OutputFcn', @jm_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT

% --- Executes just before jm is made visible.
function jm_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to jm (see VARARGIN)

% Choose default command line output for jm
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes jm wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.
function varargout = jm_OutputFcn(hObject, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
axes(handles.axes1);

mu1=1;%c´Åµ¼ÂÊ1
mu2=1;%c´Åµ¼ÂÊ2
w=get(handles.edit5);
w=str2num(w.String);%¼«»¯ÆµÂÊ
a=get(handles.edit3);
epsilon1=str2num(a.String);%½éÖÊ1µÄÏà¶Ô½éµç³£Êý
b=get(handles.edit4);
epsilon2=str2num(b.String)%½éÖÊ2µÄÏà¶Ô½éµç³£Êý;
k1=w*sqrt(mu1*epsilon1);
k2=w*sqrt(mu2*epsilon2);
sita=get(handles.edit1);
sita=str2num(sita.String);
sita1=asind(k1*sind(sita)./k2);
xv = 0:pi/10:20*pi;

ym=xv;
%plot(ym)
er=0.5;

for i=1:900

yv = sin(xv+pi/30*i);%%>>>>²¨Ðκ¯Êý
x=-xv*sind(sita);
y=xv*cosd(sita);
x=x+cosd(sita)*yv;
y=y+sind(sita)*yv;

xv1 = 0:pi/10:20*pi;
yv1 = sqrt(1-er*er)*sin(xv-pi/30*i);%%>>>·´É䲨Ðκ¯Êý
x1=xv1*sind(sita);
y1=xv1*cosd(sita);
x1=x1-2*cosd(sita)*yv1;
y1=y1+sind(sita)*yv1;

xv2 = 0:pi/10:20*pi;
yv2 = er*sin(xv-pi/30*i);%%>>>ÕÛÉ䲨Ðκ¯Êý
x2=xv2*sind(sita1);
y2=xv2*cosd(sita1);
x2=x2-cosd(sita1)*yv2;
y2=y2+sind(sita1)*yv2;

%plot(zeros(1:81))
%plot(-40:0.01:40,0)
%hold on
%plot(0,-60:0.01:60)
%hold on

plot(x,y,x1,y1,x2,-y2,[-50 50],[0 0],'k',[0 0],[-50 50],'k');

su=get(handles.edit2);
su=str2num(su.String);
sudu=1/su;
pause(sudu)
end

function edit2_Callback(hObject, eventdata, handles)
% hObject handle to edit2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit2 as text
% str2double(get(hObject,'String')) returns contents of edit2 as a double

% --- Executes during object creation, after setting all properties.
function edit2_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

function edit3_Callback(hObject, eventdata, handles)
% hObject handle to edit3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit3 as text
% str2double(get(hObject,'String')) returns contents of edit3 as a double

% --- Executes during object creation, after setting all properties.
function edit3_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end

function edit1_Callback(hObject, eventdata, handles)
% hObject handle to edit1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit1 as text
% str2double(get(hObject,'String')) returns contents of edit1 as a double

% --- Executes during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end

function edit5_Callback(hObject, eventdata, handles)
% hObject handle to edit2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit2 as text
% str2double(get(hObject,'String')) returns contents of edit2 as a double

% --- Executes during object creation, after setting all properties.
function edit5_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end

function edit8_Callback(hObject, eventdata, handles)
% hObject handle to edit8 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit8 as text
% str2double(get(hObject,'String')) returns contents of edit8 as a double

% --- Executes during object creation, after setting all properties.
function edit8_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit8 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end

function edit10_Callback(hObject, eventdata, handles)
% hObject handle to edit2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit2 as text
% str2double(get(hObject,'String')) returns contents of edit2 as a double

% --- Executes during object creation, after setting all properties.
function edit10_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end

function edit4_Callback(hObject, eventdata, handles)
% hObject handle to edit4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit4 as text
% str2double(get(hObject,'String')) returns contents of edit4 as a double

% --- Executes during object creation, after setting all properties.
function edit4_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end

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