Evolution of the RFIC Handset PAs

The fi rst offi cial shift in communication systems
from fi xed-location devices to portable/
mobile devices happened in 1973
when Martin Cooper, general manager of
Motorola's Communications Systems Division
at the time, placed the fi rst mobile call from a New
York street using AT&T's network. Four years later, the
fi rst cell phone was made in Chicago with free trials
offered to more than 2,000 people. The fi rst commercial
handset to receive FCC approval was Motorola's
DynaTAC in 1983 [1], which was made available to
the public a year later. This 1.13 kg (2.5 lb) phone that The new digital systems not only increased efficiency
of the phone but also enabled the addition
of new features such as short message service
(SMS) text messaging and downloadable content.
With the increasing demand for data transmission
in addition to voice usage, third-generation
(3G) networks were established, with emphasis
on higher data transfer capability. These networks
(and their successors) conform to the International
Mobile Telecommunications-2000 (IMT-2000) standards
that set data transfer rates over the air. Several
different 3G standards have emerged, such as
CDMA2000, evolution data only (EVDO), wideband
CDMA (WCDMA)\high-speed packet access (HSPA),
and long-term evolution (LTE).