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+// Chapter 9 example 5
+//------------------------------------------------------------------------------
+clc;
+clear;
+// Given Data
+CRR     = 100;      // Cross range resolution in m
+R       = 3000;     // radial range
+
+// Calculations
+// CRR  = (R*theta3)*(%pi/180);
+theta3  = (180*CRR)/(%pi*R)         // 3 dB beamwidth
+
+// Output
+mprintf('3 dB beamwidth = %3.2f°',theta3);
+//------------------------------------------------------------------------------