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+// chapter 4 example 8
+//-----------------------------------------------------------------------------
+clc;
+clear;
+// given data
+a       = 4;        // width in cm
+b       = 2;        // Height in cm
+c       = 3*10^10;   // vel in free space in cm/s
+fo      = 6*10^9;    // resonator frequency in Ghz
+// For TE101 mode
+m       = 1
+n       = 0;
+p       = 1;
+
+// Calculations
+//fo      = (c/2)*sqrt((m/a)^2 + (n/b)^2 + (p/d)^2);
+d       = sqrt((p^2)/((2*fo/c)^2 - (m/a)^2 - (n/b)^2));
+// Output
+mprintf('Length of cavity resonator = %3.1f cm',d);
+//------------------------------------------------------------------------------