/guides/short-range-guides/b/hardware-and-layout/posts/general-pcb-design-guidelines-for-nrf51-seriesWhen designing a PCB with nRF51, nRF51822 or nRF51422, there are some rules that should be followed in order to get a good working radio/system, with a maximized range. General rule The RF part of the schematic and layout should be a copy of our r.en-USTelligent Community 13 Non-Productionhttps://test-devzone.nordicsemi.com/guides/short-range-guides/b/hardware-and-layout/posts/general-pcb-design-guidelines-for-nrf51-seriesWed, 21 Aug 2019 11:01:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5195efa0-3d7a-4aaf-9441-b7d5e69805f6user807850<p>Hi all, if i don&#39;t want to use the J1. What else i should add to the design? what i should modify? is the J1 usefull to match the impedances?&nbsp;<br /><br />Thanks a lot!</p><img src="https://test-devzone.nordicsemi.com/aggbug?PostID=1180&AppID=15&AppType=Weblog&ContentType=0" width="1" height="1">https://test-devzone.nordicsemi.com/guides/short-range-guides/b/hardware-and-layout/posts/general-pcb-design-guidelines-for-nrf51-seriesFri, 13 Nov 2015 11:38:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5195efa0-3d7a-4aaf-9441-b7d5e69805f6user66060<p>Migrated <a href="https://devzone.nordicsemi.com/blogs/655/general-pcb-design-guidelines-for-nrf51/">this</a> from the blog section in order to increase visibility.</p> <img src="https://test-devzone.nordicsemi.com/aggbug?PostID=1180&AppID=15&AppType=Weblog&ContentType=0" width="1" height="1">