5.1 Introduction

<BODY bgcolor="#ffeee0" text="#000000" link="#9944EE" vlink="#FF0000" alink="#00ff00"> <A NAME="tex2html1928" HREF="node83_mn.html" TARGET="_top"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="page suivante" SRC="next.gif"></A> <A NAME="tex2html1922" HREF="node81_mn.html" TARGET="_top"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="niveau supérieur" SRC="up.gif"></A> <A NAME="tex2html1916" HREF="node81_mn.html" TARGET="_top"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="page précédente" SRC="prev.gif"></A> <A NAME="tex2html1924" HREF="node82_tf.html" TARGET="_top"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="table des matières" SRC="contents.gif"></A> <A NAME="tex2html1926" HREF="node82_id.html" TARGET="_top"> <IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index.gif"></A> <A NAME="tex2html1" HREF="http://www.ulg.ac.be/telecom" TARGET="_top"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="homepage du service de télécommunications" SRC="home.png" ALT="125"></A> <BR> <B> Next:</B> <A NAME="tex2html1929" HREF="node83_mn.html" TARGET="_top">5.2 Propagation des ondes</A> <B>Up:</B> <A NAME="tex2html1923" HREF="node81_mn.html" TARGET="_top">5. Propagation et systèmes</A> <B> Previous:</B> <A NAME="tex2html1917" HREF="node81_mn.html" TARGET="_top">5. Propagation et systèmes</A> <BR> <P> <P> Sorry, this requires a browser that supports frames! <BR> Try <A HREF="node82_ct.html">node82_ct.html</A> instead.</P> <HR> <ADDRESS> <span style="font-weight: bold;">Marc Van Droogenbroeck</span>. Tous droits réservés. <BR> 2005-03-11</I> </ADDRESS>