西安电子科技大学专业学位硕士学位论文模版(2014年修订版)(12)

西安电子科技大学专业学位硕士学位论文最新模版(2014年修订版)。

rectangular dielectric resonator antenna with high isolation operating at around 5.2 GHz for WLAN applications has been presented. The high isolation is achieved by using two hybrid feeding mechanism: one port having an H-shaped aperture coupled feed and the other with probe feed. Two out-of-phase probe feed is used to avoid the asymmetric radiation pattern caused by single probe feed.

4. A compact DRA has been studied. Several techniques used for reducing the size of a DRA are discussed. By using the shorting posts, a modified compact DRA is designed. Comparing with several existing antennas, the radiation patterns deformation and could be avoided and the cross polarization levels are reduced, by using shorting posts instead of shorting plate.

5. A high-gain DRA linear array has been studied. Based on the analysis results of the high-order modes of the rectangular DRA, a high-gain DRA element is selected to design an 8-element high-gain DRA linear array. The effect of spacing between adjacent elements on the gain of the array is analyzed. In addition, it is found that the gain of the proposed DRA linear array is higher than the microstrip patch linear array with the same aperture area. Finally, an 8-element DRA linear array prototype is constructed to validate the feasibility and efficiency of the design.

Keywords: XXX, XXX, XXX, XXX, XXX

Type of Dissertation: Applied Basic Research(or Basic Research )

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