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diff --git a/Antenna_and_Wave_Propagation_by_S_Wali/9-Horn_Antenna.ipynb b/Antenna_and_Wave_Propagation_by_S_Wali/9-Horn_Antenna.ipynb
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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 9: Horn Antenna"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 9.6_1: Capture_Area.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Example No. 9.6.1\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"format('v',7);\n",
+"f=2;//GHz(Frequency)\n",
+"G=12;//dBi(Gain)\n",
+"D=12;//dBi(Gain)\n",
+"D=10^(D/10);//unitless(Directivity)\n",
+"c=3*10^8;//m/s(speed of light)\n",
+"lambda=c/(f*10^9);//m(wavelength)\n",
+"Ap=D*lambda^2/7.5;//m²(capture area)\n",
+"disp(Ap,'Required capture area in m²  : ');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 9.6_2: Various_parameters_of_hor.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"//Example No. 9.6.2\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"format('v',7);\n",
+"aEBYlambda=10;//(Aperture/wavelength)\n",
+"del_EBYlambda=0.2;//in E-plane\n",
+"del_HBYlambda=0.375;//in H-plane\n",
+"LBYlambda=aEBYlambda^2/8/del_EBYlambda;//(Length/wavelength)\n",
+"disp('Length of the horn is '+string(LBYlambda)+'*lambda');\n",
+"aHBYlambda=sqrt(LBYlambda*8*del_HBYlambda);//(Aperture/wavelength)\n",
+"disp('H-plane aperture, aH is '+string(aHBYlambda)+'*lambda');\n",
+"theta_E=2*atand(aEBYlambda/2/LBYlambda);//degree(Angle)\n",
+"theta_H=2*atand(aHBYlambda/2/LBYlambda);//degree(Angle)\n",
+"disp(theta_H,theta_E,'Flare angles theta_E & theta_H(in degree) are : ');\n",
+"HPBW_E=56/aEBYlambda;//degree(HPBW for E-plane)\n",
+"disp(HPBW_E,'HPBW(E-plane) in degree : ');\n",
+"HPBW_H=67/aHBYlambda;//degree(HPBW for H-plane)\n",
+"disp(HPBW_H,'HPBW(H-plane) in degree : ');\n",
+"FNBW_E=102/aEBYlambda;//degree(FNBW for E-plane)\n",
+"disp(FNBW_E,'FNBW(E-plane) in degree : ');\n",
+"FNBW_H=172/aHBYlambda;//degree(FNBW for F-plane)\n",
+"disp(FNBW_H,'FNBW(H-plane) in degree : ');\n",
+"D=10*log10(7.5*aEBYlambda*aHBYlambda);//(Directivity)\n",
+"disp(D,'Directivity in dB  : ');"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}