RF integrated circuit antenna design..?

[varactor]

i've got to design an anntena for a Special Purpose RF integrated circuit working around 2.5Ghz..would someone please tell me where should i start from..? which type of anntena should i use..? does anybody has any sort of experiences inrelation to this topic..?

 

[mrm]

give us more information: usually at2.5GHz patch antennas work very well, but you should evaluate the overall gain, the bandwith and the free area onto your device before choosing a tecnology.