RN42 -Bluetooth module - shield pads

Discussion in 'Wireless & RF Design' started by atferrari, Dec 9, 2015.

  1. atferrari

    Thread Starter AAC Fanatic!

    Jan 6, 2004
    RN42 Bluetooth module

    The four shield pads, should they be also welded to the PCB (ground?). I think they should not but since they are shown in the scheme, I am in doubt.

    Thanks for any help.

    RN42 PCB footprint.png
  2. alfacliff

    Well-Known Member

    Dec 13, 2013
    the reason for the shield is to prevent capacitance changes when someone holds the thing. any conductive material near the tuned circuits in the bluetooth will cause slight changes in frequency. the shield provides a "shield" to any effects.