Design of Antennas for Handheld DVB-H ... - Lunds tekniska högskola
Design of Antennas for Handheld DVB-H ... - Lunds tekniska högskola
Design of Antennas for Handheld DVB-H ... - Lunds tekniska högskola
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1 Introduction<br />
The passed decade the media consumption has grown rapidly. Devices like video<br />
recorders, video-on-demand and pay-per view <strong>of</strong>ferings have enabled users to<br />
personalize the content they want to watch. Today the majority <strong>of</strong> the European<br />
population has access to Internet and a large number <strong>of</strong> TV-channels.<br />
Along with this trend is the amazing development <strong>of</strong> mobile telephones. Mobile<br />
terminals are packed with new technologies that broaden their functionality. The<br />
mobile terminal converges and can be used as an organizer, game console, music<br />
player, portable radio, agenda, camera, video camera and now, television. The<br />
place <strong>of</strong> viewing is no longer limited to a television set at home or in a vehicle.<br />
Instead, it is widened to allow personal viewing <strong>of</strong> television anytime at anyplace.<br />
Television has been brought to mobiles through the use <strong>of</strong> cellular networks.<br />
However, providing television this way is very expensive and if many users want<br />
to watch the same channel at the same time a lot <strong>of</strong> bandwidth will be used to<br />
send the same in<strong>for</strong>mation over and over again.<br />
Digital Video Broadcasting – <strong>Handheld</strong> (<strong>DVB</strong>–H) is a standard that makes it<br />
possible to deliver live broadcast television to handheld terminals. There are other<br />
standards that are competing with <strong>DVB</strong>-H to be the main television provider in<br />
Europe. All the technical problems with the <strong>DVB</strong>-H standard have not yet been<br />
solved. If <strong>DVB</strong>-H is to be the main television provider in Europe these technical<br />
problems need to be solved rather quickly. We believe they will be solved and<br />
that the <strong>DVB</strong>-H standard is the best way to provide television <strong>for</strong> mobile<br />
terminals.<br />
1.1 Thesis overview<br />
Chapter 2 <strong>of</strong> this thesis introduces the <strong>DVB</strong>-H system. It also has one part about<br />
competing standards and the last part <strong>of</strong> this chapter is an introduction <strong>of</strong> antenna<br />
theory that is related to this work.<br />
Chapter 3 gives an overview <strong>of</strong> existing antenna solutions <strong>for</strong> the <strong>DVB</strong>-H<br />
frequencies. Chapter 4 describes the design <strong>of</strong> all our solutions with return loss<br />
graphs and characteristics <strong>for</strong> the different antennas. In chapter 5 the three final<br />
prototypes are presented and different measurements on these are presented.<br />
Chapter 6 contains the results from all measurements and chapter 7 is <strong>for</strong> final<br />
conclusions.<br />
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