ABSTRACT
A wide variety of antenna types are utilized in wireless communication devices. The variation in the number of frequency bands needed to service along with the devices being designed for either cellular or ISM frequency bands is one of factors that determines antenna type selection. MIMO systems are gaining favor in WLAN as well as cellular applications, which brings isolation and envelope correlation coef-cient (ECC) requirements into the mix. Considering that most antennas in current commercial wireless devices are internal, it can be challenging to meet the electrical requirements levied on the antenna system.
