SkyCross, a start-up based in Melbourne, Florida, introduced an antenna covering both the 2.4 – 2.5 GHz and 4.9 – 5.9 GHz bands. Skycross said standard antenna designs, such as ceramic or PIFA antennas, provide coverage for specific and narrowly defined frequency bands. Its embedded antenna is designed for devices supporting all three 802.11a/b/g specifications.
http://www.skycross.com