Design of Antennas for Handheld DVB-H ... - Lunds tekniska högskola

Abstract
DVB-H is a standard that makes it possible to deliver live broadcast
television to handheld terminals. It is developed from the DVB-T standard,
which makes it possible to send DVB-H signals along with DVB-T signals in
the same multiplexer, in the DVB-H/T frequency band 470-862 MHz. A
benefit with this is that it is possible to reuse the DVB-T transmission
equipment. The differences between DVB-H and DVB-T are some additions
that improve the features for a mobile terminal in the DVB-H standard. The
most important additions are the time slicing, in order to reduce the average
power consumption, and MPE-FEC for improving Doppler performance and
tolerance against interference.
A big challenge in developing terminals for the DVB-H system is the
antenna. The problem is the low frequencies and the small size of today’s
handheld terminals. The result is electrically small antennas that are difficult
to get good efficiency with. The large bandwidth is another big problem
when designing antennas for DVB-H.
After an introduction of the DVB-H system this master thesis investigates
different solutions for both external and internal antennas for the DVB-H
system, such as PIFA, loop antenna, monopole and dipole.
The investigation takes RF performance, size, design, complexity and cost in
consideration when evaluating the proposals for DVB-H antennas.
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