AMC edge treatments enable high isolation between 802.11b and Bluetooth/spl trade/ antennas on laptop computers

Although Bluetooth and IEEE 802.11b radios each utilize spread spectrum modulation techniques in the 2.4 GHz ISM band, these two wireless standards still interfere with each other when located on the same platform such as a laptop computer. In order to diminish interference, it is advantageous to use two antennas with low mutual coupling. This may be achieved by locating an artificial magnetic conductor (AMC) that suppresses surface currents over a band of frequencies between the antennas. We have demonstrated that an AMC can be used as a reactive edge treatment to isolate two 2.4 GHz antennas by 45 dB on a surrogate laptop.