[local]1[/local]HANDSET ANTENNA DESIGN: PRACTICE AND
THEORY
W. Geyi, Q. Rao, S. Ali, and D. Wang
Research In Motion
185 Columbia St. W., Waterloo, Ontario, Canada, N2L 5Z5
Abstract—In this paper, an attempt is made to present a theory for
the design of handset antennas, which results from the long experience
that the authors have in the field of handset antenna design. The
proposed theory is based on the well-known skin effect and constructs
the antenna using a thin wire model that represent the backbone of
the final antenna. The analytical solution for the thin wire model is
first obtained, and the main properties (such as the return loss and
the radiation properties) of the antenna can then be studied using this
analytical solution. Once the antenna backbone is constructed, other
elements, such as stubs, patches, etc., can be added to optimize the
match at the desired frequency bands. A number of numerical and
analytical examples are provided throughout the paper to validate the
theory. Different antenna types, such as wire antennas and planar
antennas, are tested and designed using the thin wire model. The
correspondence between the analytical results and those from the
numerical simulations using full-wave solvers agree very well in all
examples. The authors also present in this paper a novel design of
three small antennas for handset applications, which are based on the
simple wire monopole, but in a three-dimensional form. The proposed
three-dimensional monopole antennas have multi-band and broadband
properties that cover most frequency bands being used for the handset
device. The antennas feature remarkable properties while occupying
a significantly small space, which makes them strong candidates for
handset applications and for the future multi-antenna applications too.
you can also download it from the following link
Progress In Electromagnetics Research, PIER 80, 123–160, 2008
handset antenna design from practice to theory: HANDSET ANTENNA DESIGN_PRACTICE AND THEORY.part1.rar
