西安電子科技大學(xué)專業(yè)學(xué)位碩士學(xué)位論文介質(zhì)諧振器及寬帶印刷縫隙天線研究(編輯修改稿)
2025-07-10 14:22 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 The broadband CP radiation has been achieved by using two CP radiators, DRA and annular slot. In addition, an impedance transformer is introduced to improve the impedance bandwidth. Secondly, a dual linearly polarized 西安電子科技大學(xué)碩士學(xué)位論文 IV rectangular dielectric resonator antenna with high isolation operating at around GHz for WLAN applications has been presented. The high isolation is achieved by using two hybrid feeding mechanism: one port having an Hshaped aperture coupled feed and the other with probe feed. Two outofphase probe feed is used to avoid the asymmetric radiation pattern caused by single probe feed. 4. A pact DRA has been studied. Several techniques used for reducing the size of a DRA are discussed. By using the shorting posts, a modified pact 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 highgain DRA linear array has been studied. Based on the analysis results of the highorder modes of the rectangular DRA, a highgain DRA element is selected to design an 8element highgain 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 8element 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 ) 插圖索引 V 插圖索引 圖序號(hào) 圖名稱 ....................................................................................................................... X ..................................................................................................................................................... 西安電子科技大學(xué)碩士學(xué)位論文 VI 表格索引 表格 序號(hào) 表格名稱 ............................................................................................................... X ..................................................................................................................................................... 符號(hào)對(duì)照表 VII 符號(hào) 對(duì)照 表 符號(hào) 符號(hào)名稱 XXX XXX XXX XXX XXX XXX …… …… 西安電子科技大學(xué)碩士學(xué)位論文 VIII 縮略語(yǔ)對(duì)照表 縮略語(yǔ) 英文全稱 中文對(duì)照 XXX XXX XXX XXX XXX XXX XXX XXX XXX …… …… …… 目錄 IX 目錄 摘要 .........
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