Portable electronic devices are provided with wireless circuitry that includes antennas and antenna isolation elements. The antennas may include antennas that have multiple arms and that are configured to handle communications in multiple frequency bands. The antennas may also include one or more antennas...http://www.google.de/patents/US8144063?utm_source=gb-gplus-sharePatent US8144063 - Antenna isolation for portable electronic devices
