【作者】 王雷；

【导师】 郭梅； 窦刚；

【作者基本信息】 山东科技大学 ， 控制工程（专业学位）， 2020， 硕士

【摘要】 近年来,5G技术在世界范围内掀起了新一轮的科技浪潮。5G技术不仅仅是网络速度的提升,更是全社会向数字化转变的基石。天线作为5G技术发展的载体已被引起广泛关注。在5G技术要求实现天线小型化的大背景下,低温共烧陶瓷(LTCC)技术因为具有体积小、损耗低、易集成的特点逐渐成为了天线制作的主要方法之一。本文首先设计了一个中心谐振频率分别为3.50GHz和4.85GHz的双频段曲折线型LTCC天线。研究了天线的结构布局和下层辐射天线末端曲折线结构对天线电磁耦合效应和带宽的影响。为了满足5G应用需求,本文在该天线基础上进行了优化,成功的设计出了一个同时应用于5G和WLAN双频段的LTCC曲折线天线。该天线在下层曲折线结构中间添加了一段水平方向的曲折结构,通过控制该曲折结构的长短调节了流过天线表面电流有效路径长度,改变了天线的谐振频率扩大了天线的应用范围。同时通过调节天线之间的高度差和相对重合度等因素改变了天线之间加载的电容量与电感量,优化了天线的辐射性能提高了天线的增益。最终确定天线的两个中心谐振频率分别是4.87GHz和5.53GHz,工作带宽分别为160MHz和360MHz。经测试显示天线的各项性能均十分优良,符合5G技术的应用要求。目前低频网段已经变得十分拥挤,移动通信技术也开始有了向高频网络发展的趋势。所以本文最后设计了一个应用于超高频网络的三层LTCC曲折线型天线。通过调节天线的有效辐射宽度等参数一定程度上改善了天线的阻抗匹配。天线的工作带宽分别为570MHz、450MHz、150MHz,极大改善了 LTCC天线带宽相对较窄的问题。该天线在13.80GHz频段处的增益达到了 4.57dBi,更加符合长距离无线通信的基本要求。本文所设计的天线基质材料均选用相对介电常数为6.5,损耗角正切值tanδ=0.000311905的Mg3B2O6-LMBS陶瓷玻璃体系材料。当烧结温度达到950℃时该材料展示出了优异的微波介质性能,非常适合LTCC天线的制作。在5G技术全球化的当前,小型化、多频带的LTCC天线具有十分广阔的发展前景。更多还原

【Abstract】 In recent years,5G technology has set off a new wave of technology in the world.5G technology is not only the improvement of network speed,but also the cornerstone of the whole society to digital transformation.As the carrier of 5G technology development,the antenna receives wide attention.Under the background that 5G technology requires antenna miniaturization,low temperature co-fired ceramic(LTCC)technology is one of the main methods of antenna production because of its small size,low loss,and easy integration.In this article,a dual-band zigzag line LTCC antenna with center resonant frequencies of 3.50GHz and 4.85GHz is designed first.The influence of the antenna structure layout and the zigzag line structure of the lower radiating antenna end on the antenna electromagnetic coupling effect and bandwidth is studied.In order to meet the needs of 5G applications,this article optimizes on the basis of this antenna,and successfully designs a LTCC zigzag line antenna that is applied to both 5G and WLAN dual bands.The horizontal zigzag structure is added in the middle of the lower zigzag line structure.By controlling the length of the zigzag structure,the effective path length of the current flowing through the antenna surface is adjusted.The resonance frequency of the antenna is changed to expand the application range of the antenna.At the same time,the capacitance and inductance loaded between the antennas are changed by adjusting the height difference and relative coincidence between the antennas and other factors.The radiation performance of the antenna is optimized and the transmission gain of the antenna is improved.Finally,the two center resonance frequencies of the antenna are determined to be 4.87 GHz and 5.53 GHz,and the operating bandwidth is 160 MHz and 360 MHz respectively.Tests show that the performance of the antenna is very excellent,in line with the application requirements of 5G technology.At present,the low-frequency network segment becomes very crowded and the mobile communication technology is toward the high-frequency network.Therefore,this article finally designs a three-layer LTCC zigzag line antenna for ultra-high frequency band.The impedance matching of the antenna is improved to some extent by adjusting the effective radiation width of the antenna and other parameters.The working bandwidth of the antenna is 570MHz,450MHz,15 0MHz respectively,which greatly increases LTCC antenna bandwidth.The antenna has a gain of 4.57dBi at the 13.80GHz frequency band,which is more in line with the basic requirements of long-distance wireless communication.The antenna matrix material selected in this article is Mg3B2O6-LMBS ceramic glass material with relative dielectric constant of 6.5 and loss tangent tanδ=0.000311905.When the sintering temperature reaches 950℃,the material exhibits excellent microwave dielectric properties,which is very suitable to produce LTCC antennas.With the globalization of 5G technology,miniaturized,multiband LTCC antennas have very broad development prospects.更多还原