| With the development of mobile audio-visual systems, the form of Mobile TV becomes more plentiful in recently years. Digital mobile TV antenna has many kinds, and tending to integration and miniaturization. The designation and implementation of the technology, which is called built-in digital TV antenna system used for notebook is mainly studied in this paper.First the researching background and motivation of topic, the basic theories of antenna and the definition of electrical parameters of antenna are introduced. The researching tools—the software HFSS which is used for simulating the structure of antenna and the software MWO which is used for designation and simulation RF circuit, are especially shown. Then the different structure form of antenna is discussed, more attention to the Dipole substructure microstrip form of CMMB (China Mobile Multimedia Broadcasting) antenna are paid for. By analyzing the simulation and optimization results from F type to the structure of Hilbert fractal antenna, the size of the built-in antenna is compressed and impedance matching is realized. The Frequency range is simultaneously expanded. In addition, PI type matching circuit is introduced in this paper. The designation method and components parameters optimization process are studied. How to choice the electronic components in antenna system is then presented. At last, the equipment used for testing the main antenna's performance parameters and the principle of related instruments is introduced. The testing results, which can be used for China digital mobile broadcast TV (CMMB) built-in antenna system is given in this paper. In chapter 5 all the works are summarized. |
PDF Full Text Request