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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /2219/CH7/EX7.14/Ex7_14.sce | |
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initial commit / add all books
Diffstat (limited to '2219/CH7/EX7.14/Ex7_14.sce')
| -rwxr-xr-x | 2219/CH7/EX7.14/Ex7_14.sce | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/2219/CH7/EX7.14/Ex7_14.sce b/2219/CH7/EX7.14/Ex7_14.sce new file mode 100755 index 000000000..6148ff0df --- /dev/null +++ b/2219/CH7/EX7.14/Ex7_14.sce @@ -0,0 +1,18 @@ +// chapter 7 example 14
+//-----------------------------------------------------------------------------
+clc;
+clear;
+// given data
+D = 2; // Mouth diameter in m
+f = 2; // focal length in m
+bw3db = 90/100; // beamwidth of antenna chosen to be 90% of angle subtended by feed
+
+// Calculations
+theta = 4*atan(1/(4*f/D)); // angle subtended by the focal point feed at edges of reflector
+theta_d = theta*180/%pi
+Beam_w_3dB = bw3db*theta_d; // 3 dB beam width
+NNBW = 2*(Beam_w_3dB );
+
+// Output
+mprintf('3 dB Beamwidth = %3.1f°\n Null-to-Null beam width = %3.2f°\n',Beam_w_3dB,NNBW);
+//------------------------------------------------------------------------------
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