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+{
+"cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "# Chapter 9: Ground wave Propagation"
+ ]
+ },
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 5.5: Find_maximum_possible_distance_along_earth_surface.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//Exa 9.5\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"//given data :\n",
+"HT=3000;//in meter\n",
+"HR=6000;//in meter\n",
+"d=4.12*(sqrt(HT)+sqrt(HR));//in Km\n",
+"disp(d,'Maximum possible distance in Km : ');"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 9.1: Calculate_Maximum_line_of_sight_and_field_strength.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//Exa 9.1\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"//given data :\n",
+"HT=50;//in meter\n",
+"HR=10;//in meter\n",
+"f=60;//in MHz\n",
+"P=10;//in KW\n",
+"D=10;//in Km\n",
+"D=D*10^3;//in m\n",
+"c=3*10^8;//speed of light in m/s\n",
+"lambda=c/(f*10^6);//in meter\n",
+"//Part (i) \n",
+"d=3.55*(sqrt(HT)+sqrt(HR));//in Km\n",
+"disp(d,'Maximum line of sight range in Km : ');\n",
+"//Part (ii)\n",
+"Et=88*sqrt(P*1000)*HT*HR/(lambda*D^2)\n",
+"disp(Et,'The field strength at 10 Km in V/m: ');\n",
+"//Part (iii)\n",
+"//Formula : Et=88*sqrt(p)*HT*HR/(lambda*D^2)\n",
+"Et=1;//in mV/m\n",
+"D=sqrt(88*sqrt(P*1000)*HT*HR/(lambda*Et*10^-3));//in m\n",
+"disp(D/1000,'Distance in Km : ');"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 9.2: Find_Field_Strength_at_20_Km_away.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//Exa 9.2\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"//given data :\n",
+"P=200;//in KW\n",
+"D=20;//in Km\n",
+"D=D*10^3;//in m\n",
+"E=300*sqrt(P)/D;//in V/m\n",
+"disp(E*10^3,'Field Strength at 20 Km in mV/m:')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 9.3: Calculate_field_strength_at_receiver_antenna.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//Exa 9.3\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"//given data :\n",
+"HT=10;//in meter\n",
+"HR=3;//in meter\n",
+"P=200;//in W\n",
+"D=50;//in Km\n",
+"D=D*10^3;//in Km\n",
+"f=150;//in MHz\n",
+"c=3*10^8;//speed of light in m/s\n",
+"lambda=c/(f*10^6);//in meter\n",
+"E=88*sqrt(P)*HT*HR/(lambda*D^2);//in m\n",
+"disp(E*10^6,'Field Strength at 20 Km in microV/m:')"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 9.4: Find_height_of_receiving_antenna.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//Exa 9.4\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"//given data :\n",
+"HT=100;//in meter\n",
+"d=60;//in Km\n",
+"//Formula : d=4.12*(sqrt(HT)+sqrt(HR));//in Km\n",
+"HR=(d/4.12-sqrt(HT))^2;//in meter\n",
+"disp(HR,'Height of receiving antenna in meter : ');"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 9.6: Find_Basic_Path_Loss.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//Exa 9.6\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"//given data :\n",
+"f_MHz=3000;//in MHz\n",
+"d_Km=384000;//in Km\n",
+"PathLoss=32.45+20*log10(f_MHz)+20*log10(d_Km);//in dB\n",
+"disp(PathLoss,'Path loss in dB : ');"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 9.7: Calculate_Basic_transmission_Loss.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//Exa 9.7\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"//given data :\n",
+"//Part (i)\n",
+"D=10;//in Km\n",
+"lambda=10000;//in meter\n",
+"LP=(4*%pi*D*1000/lambda)^2;//in dB\n",
+"disp(LP,'Path loss in dB : ');\n",
+"//Part (ii)\n",
+"D=10^6;//in Km\n",
+"lambda=0.3;//in cm\n",
+"LP=(4*%pi*D*1000/(lambda*10^-2))^2;//in dB\n",
+"disp(LP,'Path loss in dB : ');\n",
+"//Note : Answer in the book is wrong as value putted in the solution is differ from given in question."
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 9.8: Find_Range_of_LOS_system.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//Exa 9.8\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"//given data :\n",
+"HT=50;//in meter\n",
+"HR=5;//in meter\n",
+"d=4.12*(sqrt(HT)+sqrt(HR));//in Km\n",
+"disp(d,'Range of LOS system in Km : ');"
+ ]
+ }
+,
+{
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 9.9: Find_maximum_power_received_by_receiver.sce"
+ ]
+ },
+ {
+"cell_type": "code",
+ "execution_count": null,
+ "metadata": {
+ "collapsed": true
+ },
+ "outputs": [],
+"source": [
+"//Exa 9.9\n",
+"clc;\n",
+"clear;\n",
+"close;\n",
+"//given data :\n",
+"PT=5;//in KW\n",
+"PT=PT*1000;//in W\n",
+"D=100;//in Km\n",
+"D=D*10^3;//in m\n",
+"f=300;//in MHz\n",
+"GT=1.64;//Directivity of transmitter\n",
+"GR=1.64;//Directivity of receiver\n",
+"c=3*10^8;//speed of light in m/s\n",
+"lambda=c/(f*10^6);//in meter\n",
+"Pr=PT*GT*GR*[lambda/(4*%pi*D)]^2\n",
+"disp(Pr,'Maximum power received in Watt:');"
+ ]
+ }
+],
+"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
+}
generated by cgit (git 2.34.1) at 2024-12-19 17:43:16 +0000