www.gusucode.com > phased 案例源码 matlab代码程序 > phased/FindLobesSteeredIsotropicAntennaULAPatternsExample.m
%% Find Lobes of Steered Isotropic Antenna ULA Patterns % Create a 15-element ULA of isotropic antenna with elements spaced % one-half wavelength apart. Plot the directivity of the array at 20 GHz. % Then steer the array to 45° azimuth and plot the directivity. % Then, find the mainlobe, sidelobe, and backlobe directions of the array % pattern. fc = 20.0e9; c = physconst('Lightspeed'); lam = c/fc; angs = [-180:1:180]; antenna = phased.IsotropicAntennaElement('FrequencyRange',[1.0e9,100.0e9]); array = phased.ULA('Element',antenna,'NumElements',15,'ElementSpacing',lam/2); a = pattern(array,fc,angs,0); P = polarpattern(angs,a); %% % Steer the array to 45° azimuth and add the steered pattern to the % polar plot. steervec = phased.SteeringVector('SensorArray',array,'PropagationSpeed',c); sv = steervec(fc,[45;0]); a1 = pattern(array,fc,angs,0,'Weights',sv); add(P,angs,a1); %% % Find the lobes of the steered pattern. L = findLobes(P,2); L.mainLobe