This document describes a folded dipole PCB antenna design that can be used with the following products from Texas Instruments:

  • CC2500
  • CC2550
  • CC2510
  • CC2511

Maximum gain is measured to be 7.4 dB and overall size requirements for this antenna is 46 x 9 mm. Thus this is a compact, low cost and high performance antenna.

http://www.ti.com/lit/swra118