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This document describes a PCB antenna designed for 2.4 GHz operation. The antenna is an IP based solution from Pinyon and can be used with all transceivers and transmitters from Texas Instruments, which operates in the 2.4 GHz frequency band. Maximum gain is measured to be 6.29 dBi and the antenna size is 35 x 80 mm. Figure 1 shows a picture of the reference design using CC2430 and the Pinyon antenna. The EM board is designed to be used with the SmartRF04 ® board.
http://www.ti.com/lit/swra252