Hi,
[quote user="Sreejith Narayan"]Is there a reference design with chip antenna for cc2541?[/quote]
I think there is no such design.
[quote user="Sreejith Narayan"]
Can Fractus Compact Reach XtendTM chip antenna (FR05-S1-N-0-102) can be used with cc2541?
If so, can I connect one end of my chip antenna as per the attached figure?
[/quote]
The fractus antenna can be connected to the feed point, the other end goes to the ground.
If you (your firm) lacks the experience/equipment/know how to make a good RF PCB design, you should
start from exploring the "CC2540 USB Dongle reference design", learn it and copy as close as possible with
the change of the PCB antenna to fractus chip antenna. The layout for CC2540 and CC2541 should be the same,
except the USB part of CC2540, which is I2C on cc2541.
Pay attention on B1, C5 and R9 components.
B1 is a balun, which is used for matching the impedance of the CC2540 to 50Ohm impedance of an atenna
(Fractus chip antennas' impedance are 50Ohms too). The C5 and R9 are part of the fine tuning filter, when
the manufacturing of PCB is done and all parts assembled you'll be using (hopefully not) this filter to correct
the impedance matching. The right side of R9 is a feed point for the antenna. Fractus provides you with laoyout
recommendations for this specific antenna, follow this recommendations.
The balun (B1) in this design is from Johnason, there are other baluns that can be used along with cc254x family,
such as TDK's and Murata's (go over their prices). I think that each balun requires its own layout (to be more
specific, vias placement) although all these baluns are of the same footprint.
Start with something, and then keep on asking questions, RF guys (unfortunately I'm not one of them) will gladly
have their opinion on your design.