Mainflingen MW cross dipole antenna 2EN

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" height=50 BGCOLOR="#0099FF" TEXT="#F7F7FF"> <div> <FONT SIZE="4" COLOR="#FFFFFF" FACE="Arial" ><B>Bernd Waniewski - http://www.waniewski.de</B></FONT><B>     |     </B><A HREF="http://www.waniewski.de/index.htm" TARGET="_top" TITLE="http://www.waniewski.de/index.htm"><U><B>Startseite</B></U></A><B>   </B><A HREF="http://www.waniewski.de/id208.htm" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm"><U><B>Home </B></U></A><B>  </B><A HREF="http://www.waniewski.de/id207.htm" TARGET="_top" TITLE="http://www.waniewski.de/id207.htm"><U><B>Acceuil</B></U></A></div> <bR> <div> </div> </td> </tr><tr> <td valign="top" height=430 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> Mainflingen MW cross dipole antenna   2EN</div> <div> <TABLE BORDER="1" CELLPADDING="6" CELLSPACING="1" WIDTH="868" BORDERCOLORLIGHT="#FFCC66" BORDERCOLORDARK="#FFFFFF" FRAME="BOX" RULES="ALL" 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cross dipole antenna 4E"><U><B>4</B></U></A><B>  </B><A HREF="id333.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 5E"><U><B>5</B></U></A><B>  </B><A HREF="id334.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 6E"><U><B>6</B></U></A><B>  </B><A HREF="id336.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 7E"><U><B>7</B></U></A><B>  </B><A HREF="id337.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 8E"><U><B>8</B></U></A></div> </tD> <tD VALIGN=TOP WIDTH="84"><div> <A HREF="id311.htm" TARGET="_top" TITLE="Mainflingen MW Kreuzdipol 2DE"><U><IMG SRC="a94331f0.gif" border=0 width="51" height="31" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A></div> <div> <A HREF="id311.htm" TARGET="_top" TITLE="Mainflingen MW Kreuzdipol 2DE"><U>German</U></A></div> </tD> <tD VALIGN=TOP BGCOLOR=#FFCC66 WIDTH="84"><div> <A HREF="http://www.waniewski.de/id208.htm" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm"><U><B>Home</B></U></A></div> </tD> 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WIDTH="84"><div> <A HREF="http://www.waniewski.de/id208.htm#all_english_versions_of_antenna_sites" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_en"><U>Survey of </U></A></div> <div> <A HREF="http://www.waniewski.de/id208.htm#all_english_versions_of_antenna_sites" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_en"><U>projects</U></A></div> <div> <A HREF="http://www.waniewski.de/id208.htm#all_english_versions_of_antenna_sites" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm#all_en"><U> A-Z</U></A></div> </tD> </tR> </TABLE></div> <div> <TABLE BORDER="1" CELLPADDING="6" CELLSPACING="1" WIDTH="865" BORDERCOLORLIGHT="#FFCC66" BORDERCOLORDARK="#FFFFFF" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" BGCOLOR=#FFFFCC > <tR> <tD VALIGN=TOP BGCOLOR=#FFCC66 HEIGHT= 54 WIDTH="113"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="54" ALIGN="bottom" WIDTH="113" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="368"><div> The dipoles</div> </tD> <tD VALIGN=TOP BGCOLOR=#FFFFCC WIDTH="336"><div> <B>History (</B>continued from<FONT SIZE="3" COLOR="#000000" FACE="Arial" > </FONT><FONT SIZE="3" COLOR="#0000FF" FACE="Arial" ><A HREF="mainflingen_mw_cross_dipole_antenna_1en.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 1E"><U><B>1</B></U></A><A HREF="mainflingen_mw_cross_dipole_antenna_1en.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 1E"><U><B>E</B></U></A></FONT>) and </div> <div> <B>technical description</B>:             </div> <div> <A HREF="#history_continued_" TITLE="Mainflingen MW cross dipole antenna 2E"><U>see below</U></A></div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 531 WIDTH="113"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="531" ALIGN="bottom" WIDTH="113" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP COLSPAN=2 BGCOLOR=#FFCC66><NOBR><div> <IMG SRC="1c89bc0d0.jpg" border=0 width="700" height="525" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 531 WIDTH="113"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="531" ALIGN="bottom" WIDTH="113" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP COLSPAN=2 BGCOLOR=#FFCC66><NOBR><div> <IMG SRC="1c89bc0d0.jpg" border=0 width="700" height="525" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP BGCOLOR=#FFCC66 HEIGHT= 494 WIDTH="113"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="494" ALIGN="bottom" WIDTH="113" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> <IMG SRC="1c8b6ee80.jpg" border=0 width="366" height="488" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> <tD VALIGN=TOP ROWSPAN=4 BGCOLOR=#FFFFCC WIDTH="336"><div>  <A NAME="history_continued_"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="1" ALIGN="bottom" WIDTH="1" HSPACE="0" VSPACE="0" ></A><FONT SIZE="2" COLOR="#000000" FACE="Arial" ><B>History </B></FONT><B>(</B><FONT SIZE="2" COLOR="#000000" FACE="Arial" >continued from</FONT> <FONT SIZE="3" COLOR="#0000FF" FACE="Arial" ><A HREF="mainflingen_mw_cross_dipole_antenna_1en.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 1E"><U><B>1</B></U></A><A HREF="mainflingen_mw_cross_dipole_antenna_1en.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 1E"><U><B>E</B></U></A></FONT>):</div> <bR> <div> The results have been so convincing, that a preliminary decision in favour of the antenna was made. </div> <div> Many more obstacles had to be removed, in particular financial and environmental issues, as the antnna is located in the middle of a forest, finally the green light for erection of the antenna was given.</div> <bR> <div> <B>Technical description:</B></div> <bR> <div> The cross dipole in Mainflingen is an ionospheric antenna which consists of five guided supporting masts and the two horizontal dipoles arranged orthogonally atop of the masts. </div> <bR> <div> The design of the antenna including the supporting masts and the guys can be seen as plots of the computer model.</div> <div> The cross dipol has a circular polarisation, which means that the wave of one dipole lags the wave of the other dipole by 90 degrees. A right or left rotating field occurs depending on which dipole lags. The sense of rotation is important due to the properties of the ionosphere: only with one sense of rotation the waves are reflected. With the other sense the waves are let through the ionosphere. These are the ordinary and the extraordinary wave.</div> <div> Standing below the antenna and looking into the direction of the ionosphere a right sense of rotation is needed to excite the ordinary wave.</div> <div>  </div> <div> During measuring tests this behaviour was demonstrated by reverting the sense of rotation.  A difference of approx. 20 dB was noted for the reception field strength.</div> <bR> <DIV ALIGN="LEFT"></DIV> <div> to be continued  on     <FONT SIZE="2" COLOR="#0000FF" FACE="Arial" > </FONT><FONT SIZE="3" COLOR="#0000FF" FACE="Arial" ><A HREF="id332.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 4E"><U><B>> 4E</B></U></A></FONT></div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 377 WIDTH="113"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="377" ALIGN="bottom" WIDTH="113" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> <IMG SRC="76e69730.gif" border=0 width="361" height="371" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP BGCOLOR=#FFCC66 HEIGHT= 19 WIDTH="113"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="19" ALIGN="bottom" WIDTH="113" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="368"><div> computer model - perspective view</div> </tD> </tR> <tR> <tD VALIGN=TOP HEIGHT= 370 WIDTH="113"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="370" ALIGN="bottom" WIDTH="113" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> <IMG SRC="7706b6c0.gif" border=0 width="363" height="364" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> </NOBR></tD> </tR> <tR> <tD VALIGN=TOP BGCOLOR=#FFCC66 HEIGHT= 36 WIDTH="113"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="36" ALIGN="bottom" WIDTH="113" HSPACE="0" VSPACE="0"></tD> <tD VALIGN=TOP WIDTH="368"><div> computer model - top view</div> </tD> <tD VALIGN=TOP BGCOLOR=#FFCC66 WIDTH="336"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="36" ALIGN="bottom" WIDTH="336" HSPACE="0" VSPACE="0"></tD> </tR> </TABLE></div> <div> <TABLE BORDER="1" CELLPADDING="6" CELLSPACING="1" WIDTH="865" 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 </B><A HREF="id333.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 5E"><U><B>5</B></U></A><B>  </B><A HREF="id334.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 6E"><U><B>6</B></U></A><B>  </B><A HREF="id336.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 7E"><U><B>7</B></U></A><B>  </B><A HREF="id337.htm" TARGET="_top" TITLE="Mainflingen MW cross dipole antenna 8E"><U><B>8</B></U></A></div> </tD> <tD VALIGN=TOP><NOBR><div> <A HREF="id311.htm" TARGET="_top" TITLE="Mainflingen MW Kreuzdipol 2DE"><U><IMG SRC="a94331f0.gif" border=0 width="51" height="31" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A></div> <div> <A HREF="id311.htm" TARGET="_top" TITLE="Mainflingen MW Kreuzdipol 2DE"><U>German</U></A></div> </NOBR></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66><NOBR><div> <A HREF="http://www.waniewski.de/id208.htm" TARGET="_top" TITLE="http://www.waniewski.de/id208.htm"><U><B>Home</B></U></A></div> </NOBR></tD> <tD VALIGN=TOP BGCOLOR=#FFCC66 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