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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Just look up the datasheets for any of the antennas Ian – they give all the usual polar patterns, gain figures, FB ratios etc as you would get for any broadcast antenna. They’re much what you expect – the panel antennas are in simplest terms just a broadside phased array, just like you might construct with conventional metalwork antennas.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>As with the more familiar dipoles and Yagis they can be scaled and optimized for gain, pattern and operating frequencies, but typically aren’t used below 300MHz. Gains typically range over 0-24dBi, for higher gains dishes tend to be more practical and better controlled patterns. Panels tend to have more sidelobes and poorer front-back ratios than end fire arrays like Yagis or dishes, but can be relatively easily screened at higher frequencies.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Eg for the <a href="http://www.amphenol-antennas.com/getattachment/d407a33f-db8d-40cb-999a-f17377f11410/Products/Antennas/Antenna-Accessories-(1)/Tri-Sector-TRIO-Accessories-(1)/GPS-Antenna-Mounts/5680000.aspx">Jaybeam 14dB 568000</a> one we use on our STL: <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><img border=0 width=719 height=265 id="Picture_x0020_1" src="cid:image002.jpg@01D1BE5A.B1586770"></span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>For a typical 5.8GHz 21dBi w-fi panel:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><img border=0 width=746 height=354 id="Picture_x0020_2" src="cid:image003.jpg@01D1BE5A.58FCED80"></span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> <a href="mailto:cma-l-bounces@mailman.commedia.org.uk">cma-l-bounces@mailman.commedia.org.uk</a> [<a href="mailto:cma-l-bounces@mailman.commedia.org.uk">mailto:cma-l-bounces@mailman.commedia.org.uk</a>] <b>On Behalf Of </b>Ian Hickling<br><b>Sent:</b> 03 June 2016 22:45<br><b>To:</b> The Community Media Association Discussion List <<a href="mailto:cma-l@mailman.commedia.org.uk">cma-l@mailman.commedia.org.uk</a>><br><b>Subject:</b> [cma-l] Radio Link Transmission systems<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-family:"Calibri",sans-serif;color:black'>I'm familiar with that general principle - very common in mobile phone base station panel construction - but as an antenna engineer I was more concerned with the operating frequency, forward gain and propagation pattern - which as yet are not clear from what I can read here.</span><span style='font-family:"Calibri",sans-serif'><o:p></o:p></span></p><div><p class=MsoNormal style='line-height:17.05pt;background:white;background-image:initial;background-attachment:initial;background-size:initial;background-origin:initial;background-clip:initial;background-position:initial;background-repeat:initial'><span style='font-family:"Calibri",sans-serif;color:#222222'>Ian Hickling</span><span style='font-family:"Calibri",sans-serif;color:#444444'><o:p></o:p></span></p></div><p class=MsoNormal style='line-height:17.05pt;background:white'><span style='font-family:"Calibri",sans-serif;color:#222222'>Partner</span><span style='font-family:"Calibri",sans-serif;color:#444444'><br><br><a href="http://www.transplanuk.com/" target="_blank"><span style='color:#1155CC;text-decoration:none'><img border=0 id="ecx_x005f_x0000_i1025" src="https://ci4.googleusercontent.com/proxy/2SkDsnIzSZgRbNnNKBSiwxiFhFQWRGV55mTjVL23fulnJpstZmYxeKrrYefY4qxiSgkMrAETld64XINLXCsujE_zI5gAsQyWeCWvHixcrNYtar3Sij4YlVBgN2NSQ-n2DsgZvrnpWZlfwCQ=s0-d-e1-ft#http://www.transplanuk.com/wp-content/uploads/2014/07/transplan_UK_weblogo_190x60.png"></span></a><o:p></o:p></span></p><div><p class=MsoNormal style='line-height:17.05pt;background:white'><i><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#222222'>Office: 016 3557 8435 (07h to 22h GTS)</span></i><span style='color:#444444'><o:p></o:p></span></p></div><div><p class=MsoNormal style='line-height:17.05pt;background:white'><i><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#222222'>Car: 075 3098 0115 (only responds when driving)</span></i><span style='color:#444444'><o:p></o:p></span></p></div><div><p class=MsoNormal style='line-height:17.05pt;background:white'><i><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#222222'>6 Horn Street, Compton, NEWBURY, RG20 6QS</span></i><span style='color:#444444'><o:p></o:p></span></p></div></div></div><br />
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