Abstract—A novel patch antenna suitable to be applied in a mobile device
as an internal antenna havingan electromagnetic compatibility (EMC)
property with nearby conductingelements is presented. The antenna is
easily fabricated from a single metal plate and mainly comprises a top
patch and an inverted-L vertical ground wall. Due to the presence of the inverted-L
ground wall, which is perpendicular to the system ground plane of
the mobile device, the possible fringing EM fields in the surrounding region
of the antenna are suppressed. In this case possible couplingbetween the
antenna and the nearby conductingelements is expected to be small, and
thus degrading effects on the performance of the antenna are eliminated.
A design example of the proposed antenna for Universal Mobile Telecommunication
System (UMTS) 1920–2170 MHz operation in a mobile device
is demonstrated and discussed.