yagiudadraw.m

天线设计方面的资料

function YagiUdaDraw(handles)

boomlength = (get(handles.Parameter1,'Value'));
dir_no = (get(handles.Parameter2,'Value'))-2;
ref_len = (get(handles.Parameter4,'Value'));
ratio = (get(handles.Parameter5,'Value'));

% ratio -> ref / dir
dir_len = ref_len/ratio;

set(handles.Wizard,'CurrentAxes',handles.antenna)

% set(handles.antenna,'XMinorTick','on');

LineWidth = 2;

spa = (boomlength/(dir_no+1));
spa1 = spa;

% Plot the Boom
plot([0 boomlength],[0 0],'k','LineWidth',LineWidth)
hold on

% plots the reflector
x1 = 0;
y1 = [-ref_len/2 ref_len/2];
plot ([0 0], y1,'b','LineWidth',LineWidth);


for x = 1:(dir_no+1)
    y1 = [(-dir_len/2) (dir_len/2)];
    x1 = [spa1 spa1];
    % Identifies the driven element of the yagi antenna and plots it in red
    if x == 1
        plot (x1,y1, 'r','LineWidth',LineWidth);
    %Plots the rest of the directors elements in Blue
    else
        plot (x1,y1, 'b','LineWidth',LineWidth);
    end;
    hold on;
    spa1 = spa1 + spa;
    %set(handles.antenna,'XMinorTick','on')
end;
axis([-spa (boomlength + spa) ((-ref_len/2 - spa/10) ) (((ref_len)/2 + spa/10) )]);

plot(spa,0,'sk','MarkerSize',LineWidth+4,'MarkerFaceColor','r')

hold off;

if get(handles.Grid,'Value')
    grid(handles.antenna);
end

title({'\bf Yagi-Uda Array','\bf Preview'})
if get(handles.Units,'Value')
    xlabel('\bf Boom Length (\rm{m}\bf)');
    ylabel('\bf Element Length (\rm{m}\bf)'); 
else
    xlabel('\bf Boom Length (\rm\lambda\bf)');
    ylabel('\bf Element Length (\rm\lambda\bf)');
end
% set(handles.antenna,'DataAspectRatio',[1 1 1])