本文選題：多頻 + 圓極化　； 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：隨著各國衛(wèi)星導(dǎo)航定位系統(tǒng)的發(fā)展,寬波束多頻圓極化天線是導(dǎo)航定位系統(tǒng)發(fā)展的重要方向之一。本文針對(duì)這一熱點(diǎn)研究方向著重研究了一種多頻圓極化天線。與此同時(shí)隨著衛(wèi)星導(dǎo)航系統(tǒng)逐步應(yīng)用于武器制導(dǎo)、軌跡測(cè)量和姿態(tài)確定等精密科學(xué)領(lǐng)域,本文還設(shè)計(jì)了一款彈載全向天線。首先,對(duì)現(xiàn)有的多頻段衛(wèi)星導(dǎo)航定位天線進(jìn)行了分析與研究,設(shè)計(jì)了兩種多頻圓極化天線。分析了天線安裝結(jié)構(gòu)及尺寸對(duì)其性能的影響,并利用HFSS仿真軟件進(jìn)行了優(yōu)化設(shè)計(jì)。在仿真的基礎(chǔ)上制作了天線實(shí)物,并對(duì)天線進(jìn)行了實(shí)物測(cè)量。測(cè)量結(jié)果表明:地面站多頻圓極化天線其三個(gè)頻點(diǎn)工作帶寬內(nèi)駐波系數(shù)(VSWR)小于2,軸向增益高于2dBi,仰角15增益高于0dBi;星載多頻圓極化天線帶寬內(nèi)駐波系數(shù)(VSWR)小于2,?60波束范圍內(nèi)增益大于1dBi,低頻相位中心穩(wěn)定度小于5mm,高頻相位中心穩(wěn)定度小于2mm。其次,設(shè)計(jì)了一款錐形彈載全向天線,通過設(shè)置陣列單元分布實(shí)現(xiàn)天線的全向輻射,并通過改變貼片的形狀尺寸優(yōu)化天線的性能。通過HFSS設(shè)計(jì)了天線的饋電網(wǎng)絡(luò),最后制作出天線實(shí)物。對(duì)該天線進(jìn)行了測(cè)試,結(jié)果表明天線在其工作頻段內(nèi)駐波系數(shù)(VSWR)小于1.5,單元天線的軸向軸比小于3dB,陣列天線水平面全向軸比小于6dB。天線在其方位面具有很好的輻射方向圖,不圓度小于2dB,實(shí)現(xiàn)了彈載天線全向輻射的設(shè)計(jì)要求。
[Abstract]:With the development of satellite navigation and positioning system, wide beam multi-frequency circular polarization antenna is one of the important directions of navigation and positioning system. In this paper, we focus on a multi-frequency circular polarization antenna. At the same time, with the application of satellite navigation system to the precision science of weapon guidance, trajectory measurement and attitude determination, a projectile omnidirectional antenna is designed. Firstly, the existing multi-band satellite navigation and positioning antennas are analyzed and studied, and two kinds of multi-frequency circular polarization antennas are designed. The influence of antenna installation structure and size on its performance is analyzed, and the optimization design is carried out by using HFSS simulation software. On the basis of simulation, the antenna object is made and the antenna is measured. The measurement results show that the VSWR is less than 2, the axial gain is higher than 2dBiand the elevation angle 15 gain is higher than 0dBi.The VSWR within the bandwidth of spaceborne multi-frequency circular polarization antenna is less than 2dSWR. In the range of beam, the gain is greater than 1dBi. the stability of low-frequency phase center is less than 5mm, and the stability of high-frequency phase center is less than 2mm. Secondly, a conical projectile omnidirectional antenna is designed. The omnidirectional radiation of the antenna is realized by setting the array element distribution, and the performance of the antenna is optimized by changing the shape and size of the patch. The antenna feeder network is designed by HFSS, and the antenna is made at last. The results show that the standing wave coefficient (VSWR) is less than 1.5, the axial ratio is less than 3 dB, and the horizontal plane omnidirectional axial ratio of array antenna is less than 6 dB. The antenna has a good radiation pattern in its azimuth mask, and the degree of roundness is less than 2 dB, which meets the design requirement of omnidirectional radiation of the projectile antenna.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN967.1

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本文編號(hào)：1963647