I looked over the Antenna Application note and the schematic for the CC2541 Sensor tag. On the CC2541, there is a 1.2pF Cap in series with the antenna and an inductor to ground. This design uses a Balance Matching BAND PASS FILTER from MuRata that lowers the discrete device count. In the MuRata reference design it does not contain the Series Bap and the Inductor. On the USB stick for connection to the PC it also uses this Filter / Cap / Inductor design, but I am unable to find the schematic / parts list for that part of the design.
In the Sensor Tag, these devices are included. The Cap is a 1.2pF cap. All I can find about the inductor is that it is an 0402 size and that it is a "General Inductor" Can someone point me to a value for the inductor? I would like an 0603 size device.