YARD Stick One (Yet Another Radio Dongle)

This is an experimental design for a CC1111 USB dongle.  It is intended to work
with RfCat:

https://github.com/atlas0fd00m/rfcat

This design was made with KiCad:

http://www.kicad-pcb.org/

order of copper layers:
    Front
    Layer2
    Layer3
    Back

PCB description: 4 layer PCB 0.0646 in
    Copper       1:  1 oz copper (1.4 mil)
    Dielectric 1-2:  6.7 mil prepreg
    Copper       2:  0.5 oz copper (0.7 mil)
    Dielectric 2-3:  47 mil core
    Copper       3:  0.5 oz copper (0.7 mil)
    Dielectric 3-4:  6.7 mil prepreg
    Copper       4:  1 oz copper (1.4 mil)

FR408 or similar substrate with Er=3.66 (+/- 0.1)
double side solder mask
double side silkscreen
5 mil min trace width and
5 mil min isolation

PCBs of this specification are available from OSH Park.