Antennas for small mobile terminals

Abstract

Digital Video Broadcasting for Handheld Terminals (DVB-H) is a service based on DVB-T (for terrestrial broadcasting). Some differences and changes must be considered to adapt the existing DVB-T technology to the experimental DVB-H one. The purpose of this master thesis is to design the best possible antenna for DVB-H. In order to achieve this, some scenarios are considered such as the influence of the human hand and wood or metal planes (emulating tables). As this antenna must be inside a handheld device, its size will be a very limiting factor. This is worsen by the fact that the wavelength is bigger than the size of the handheld device and so this constraint will add more problems related with small bandwidth, impedance matching, received power, etc. Thanks to the simulations, two planar monopole antennas have been chosen and explained in detail under the different scenarios. It will be seen that these two antennas are small enough to fit in a handheld device and that they can overcome all the problems related with the wavelength, received power, human body interference, etc.