Kymeta's antenna doesn't use moving parts, so it's less than half an inch thick.
The mTenna is based on "Metamaterials surface antenna technology", or M-SAT, an alternative to traditional satellite antennas.
The mTenna is approximately as large as a laptop computer.
Traditional moving antennas create a bulge on the fuselage, with added drag and fuel consumption.
Kymeta is just two years old: it has received funding, among other, by Bill Gates.