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<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>PCB Antenna nrf51822</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/51292/pcb-antenna-nrf51822</link><description>Hello! I am developing a pcb based on nrf51822. I am trying to copy the layout of the PCA10028 at first. But I will not use the coaxial connector for an external antenna. How does the elimination of this component affect the impedance adaptation? How</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Thu, 22 Aug 2019 11:43:15 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/51292/pcb-antenna-nrf51822" /><item><title>RE: PCB Antenna nrf51822</title><link>https://devzone.nordicsemi.com/thread/205573?ContentTypeID=1</link><pubDate>Thu, 22 Aug 2019 11:43:15 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:73001dc4-1ce9-4598-bf12-fca20ec9a6e6</guid><dc:creator>Andreas</dc:creator><description>&lt;p&gt;Hi,&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Difficult to say yet, there seems to be quite a bit of traces to be routed all over the board but it should be possible to make it work quite well. Make sure you place down a lot of vias between top and bottom layer ground planes and see if you maybe are able to move stuff around a bit to maximize the area you can use as ground.&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Best regards,&lt;/p&gt;
&lt;p&gt;Andreas&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: PCB Antenna nrf51822</title><link>https://devzone.nordicsemi.com/thread/205523?ContentTypeID=1</link><pubDate>Thu, 22 Aug 2019 10:03:20 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:05c1cad5-9e07-40fd-9023-630881a8baa8</guid><dc:creator>Nasib</dc:creator><description>&lt;p&gt;Hi&amp;nbsp;thank you very much for your quick response. I have one last doubt. Do you think that in my design I have enough space for a healthy&amp;nbsp;ground plane? (This is going to be a 2 layer pcb) and I&amp;#39;m going to put 2 GND planes (Top and Bottom).&lt;br /&gt;&lt;br /&gt;&lt;img src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1566468020531v1.png" alt=" " /&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: PCB Antenna nrf51822</title><link>https://devzone.nordicsemi.com/thread/205503?ContentTypeID=1</link><pubDate>Thu, 22 Aug 2019 09:22:11 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:fc068b86-228f-4351-9f2d-ce1ffd93da83</guid><dc:creator>Andreas</dc:creator><description>&lt;p&gt;Hi,&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Just fill the void after removing the coaxial connector with 50 ohm coplanar waveguide, i.e. have the wide trace starting at C6/L3 go all the way to C15 using the same width and gap. Similar to&lt;/p&gt;
&lt;p&gt;&lt;img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-cd40c4f838684580a758499eec7cc8d6/pastedimage1566465667268v1.png" alt=" " /&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Best regards,&lt;/p&gt;
&lt;p&gt;Andreas&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>