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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 13: TRANSMISSION LINES AND CABLES"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 13.10_1: example_2.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"//page no 485\n",
+"//prob no. 13.10.1\n",
+"// Measurements on a 50 ohm slotted line gave\n",
+"Z0=50;//measured in ohm\n",
+"VSWR=2.0;\n",
+"d=0.2;//distance from load to first minimum\n",
+"T=(VSWR-1)/(VSWR+1);\n",
+"pi=180;\n",
+"Ql=pi*(4*0.2-1);\n",
+"// using Euler's identity\n",
+"e=cosd(Ql)+%i*sind(Ql);// expansion for e^(jQl);\n",
+"a=T*e;\n",
+"//Load impedance is given as\n",
+"ZL=Z0*(1+a)/(1-a);\n",
+"disp('ohm',real(ZL),'a) The equivalent  series resistance is');\n",
+"disp('ohm',imag(ZL),'The equivalent  series reactance is');\n",
+"disp('The minus sign indicate the capacitive reactance');\n",
+"Yl=1/ZL;\n",
+"disp('ohm',1/real(Yl),'b) The equivalent  parallel resistance is');\n",
+"disp('ohm',1/imag(Yl),'The equivalent  parallel reactance is');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 13.11_1: example_3.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"//page no 488\n",
+"//prob no. 13.11.1\n",
+"d=0.1;//length of 50ohm short-circuited line\n",
+"Z0=50;//in ohm\n",
+"f=500*10^6;//freq in Hz\n",
+"pi=180;\n",
+"Bl=2*pi*d;\n",
+"//a)Determination of equivalent inductive reactance\n",
+"Z=%i*Z0*tand(Bl);\n",
+"disp('ohm','i',Z,'The equivalent inductive reactance is');\n",
+"//b)Determination of equivalent inductance\n",
+"L_eq=Z/(2*%pi*f);\n",
+"disp('nH',L_eq*10^9,'The equivalent inductance is');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 13.17_1: example_4.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"//page no 513\n",
+"//prob no. 13.17.1\n",
+"VSWR=2;l_min=0.2;Z0=50;\n",
+"Ql=((4*l_min )- 1)*%pi;\n",
+"tl=(VSWR-1)/(VSWR+1);\n",
+"Tl=tl*%e^(%i*Ql);\n",
+"Zl=Z0*(1+Tl)/(1-Tl);\n",
+"disp('ohm',real(Zl),'a) The equivalent  series resistance is');\n",
+"disp('ohm',imag(Zl),'The equivalent  series reactance is');\n",
+"disp('The minus sign indicate the capacitive reactance');\n",
+"Yl=1/Zl;\n",
+"disp('ohm',1/real(Yl),'b) The equivalent  parallel resistance is');\n",
+"disp('ohm',1/imag(Yl),'The equivalent  parallel reactance is');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 13.17_2: example_5.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"//page no 514\n",
+"//prob no. 13.17.2\n",
+"// A transmission line is terminated with\n",
+"ZL=30-(%i*23);\n",
+"l=0.5;//// length of line in m\n",
+"Z0=50;//characteristic impedance in ohm\n",
+"wl=0.45;//wavelength on the line in m\n",
+"B=2*%pi/wl;\n",
+"Tl=(ZL-Z0)/(ZL+Z0)\n",
+"VI=1;//reference voltage in volt\n",
+"VR=VI*Tl;\n",
+"Vi=VI*%e^(%i*B*l);\n",
+"Vr=VR*%e^-(%i*B*l);\n",
+"V=Vi+Vr;\n",
+"I=(Vi-Vr)/Z0;\n",
+"Z=V/I;\n",
+"disp('ohm',Z,'The input impedance is');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 13.17_3: example_6.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"//page no 515\n",
+"//prob no. 13.17.3\n",
+"Z0=600;Zl=73;//in ohm\n",
+"F=0.9;\n",
+"QF=(2*%pi*F)/4;\n",
+"//For matching, the effective load impedance on the main line must equal the characteristic impedance of the mail line\n",
+"Zl1=Zl;\n",
+"Z01=sqrt(Zl1*Zl);\n",
+"Tl=(Zl-Z01)/(Zl+Z01);\n",
+"VI=1;//reference voltage\n",
+"Vi=VI*%e^(%i*QF);\n",
+"Vr=Tl*VI*%e^-(%i*QF);\n",
+"V_in=Vi+Vr;\n",
+"I_in=(Vi-Vr)/Z01;\n",
+"Z_in=V_in/I_in;\n",
+"disp('ohm',Z_in,'The input impedance is');\n",
+"//the voltage reflection coeff is\n",
+"TL_F=(Z_in-Z0)/(Z_in+Z0);\n",
+"//the VSWr is given as\n",
+"VSWR_F=(1+TL_F)/(1-TL_F);\n",
+"disp(VSWR_F,'The VSWR is');"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 13.5_2: example_1.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc;\n",
+"//page no 475\n",
+"//prob no. 13.5.2\n",
+"// The attenuation coeff is 0.0006 N/m\n",
+"a=0.0006;//The attenuation coeff in N/m\n",
+"//a)Determinaion of the attenuation coeff in dB/m\n",
+"a_dB=8.686*a;\n",
+"disp('dB/m',a_dB,'The attenuation coeff is');\n",
+"//b) Determination of attenuation coeff in dB/mile\n",
+"k=1609;//conversion coeff for meter to mile\n",
+"a_dB_mile=k*a_dB;\n",
+"disp('dB/mile',a_dB_mile,'The attenuation coeff is');"
+   ]
+   }
+],
+"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
+}