CN103594787B - U-shaped multifrequency coplane mobile phone antenna - Google Patents
U-shaped multifrequency coplane mobile phone antenna Download PDFInfo
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Abstract
本发明公开了一种U形多频共面手机天线。它包括基板、阻抗匹配输入传输线、U形辐射贴片、阻抗匹配短路线、左U形枝节、右U形枝节、L形枝节、L形接地线、右矩形接地线、中矩形接地线、左矩形接地线、U形耦合接地线、小矩形接地板、大矩形接地板。基板的上表面设有阻抗匹配输入传输线、U形辐射贴片、阻抗匹配短路线、左U形枝节、右U形枝节、L形枝节、L形接地线、右矩形接地线、中矩形接地线、左矩形接地线、U形耦合接地线、小矩形接地板、大矩形接地板。该天线是通过阻抗匹配输入传输线和阻抗匹配短路线进行耦合馈电的。本发明具有多频带，结构简单，体积小，质量轻，易于制作及便于集成等优点，在手机中有很好的应用前景。
The invention discloses a U-shaped multi-frequency coplanar mobile phone antenna. It includes substrate, impedance matching input transmission line, U-shaped radiation patch, impedance matching short circuit, left U-shaped branch, right U-shaped branch, L-shaped branch, L-shaped grounding wire, right rectangular grounding wire, middle rectangular grounding wire, left Rectangular grounding wire, U-shaped coupling grounding wire, small rectangular grounding plate, large rectangular grounding plate. The upper surface of the substrate is provided with an impedance matching input transmission line, a U-shaped radiation patch, an impedance matching short circuit, a left U-shaped branch, a right U-shaped branch, an L-shaped branch, an L-shaped grounding wire, a right rectangular grounding wire, and a middle rectangular grounding wire , Left rectangular grounding wire, U-shaped coupling grounding wire, small rectangular grounding plate, large rectangular grounding plate. The antenna is coupled and fed through an impedance-matched input transmission line and an impedance-matched short-circuit line. The invention has the advantages of multiple frequency bands, simple structure, small size, light weight, easy manufacture and integration, and has good application prospects in mobile phones.
Description
技术领域 technical field
本发明涉及天线，尤其涉及一种U形多频共面手机天线。 The invention relates to antennas, in particular to a U-shaped multi-frequency coplanar mobile phone antenna.
背景技术 Background technique
根据联合国国际电信联盟(ITU)日前发布的最新统计报告显示，截至 2011 年年底，全球手机用户总量已经达到 59 亿，而全球人口为 70 亿，这份手机用户量的报告说明移动通信已深入到全球公众的日常生活当中，移动手机成为最为普及的一项电子产品之一，而在全球所有手机用户中，移动宽带用户将近 12 亿，在过去四年中，全球移动宽带用户量正以每年 45%高速增长，截至到目前，全球移动宽带用户数与固话宽带用户数比率已达到 2:1，这明移动宽带的时代已经来临。在全球，为推动移动宽带产业的发展，世界上已经有 159 个国家和地区推出了 3G 移动通信网络，虽然目前 2G 网络的覆盖范围仍是 3G 网络的两倍，但可以相信在不远的将来 3G网络将会达到或者超过 2G 网络的覆盖范围。 According to the latest statistical report released by the United Nations International Telecommunication Union (ITU), by the end of 2011, the total number of mobile phone users in the world has reached 5.9 billion, while the global population is 7 billion. In the daily life of the global public, mobile phones have become one of the most popular electronic products. Among all mobile phone users in the world, there are nearly 1.2 billion mobile broadband users. In the past four years, the number of global mobile broadband users has grown at an annual rate of 45% high-speed growth, as of now, the ratio of the number of mobile broadband users to the number of fixed broadband users in the world has reached 2:1, which indicates that the era of mobile broadband has come. In the world, in order to promote the development of the mobile broadband industry, 159 countries and regions in the world have launched 3G mobile communication networks. Although the current coverage of 2G networks is still twice that of 3G networks, it is believed that in the near future 3G network will reach or exceed the coverage of 2G network.
伴随着 3G 网络广泛建设，以及 LTE 和 WiMAX 标准的兴起，移动通信系统正向着 4G时代稳步迈进，移动手机也向着互联网娱乐型终端的方向发展，而手机天线作为手机终端中一个极其重要的组成部分，制约着手机无线传输的整体性能，传统的手机天线已经不能满足 4G 无线通信：多频带和宽频化的要求，各种小型化 LTE 手机天线已经成为时下通信业研究的热点，因此在手机天线小型化、多频化和宽带化方向上的探讨和研究显然有着重要的意义。 With the extensive construction of 3G networks and the rise of LTE and WiMAX standards, mobile communication systems are steadily moving towards the 4G era, and mobile phones are also developing towards Internet entertainment terminals, and mobile phone antennas are an extremely important part of mobile phone terminals. , restricting the overall performance of mobile phone wireless transmission, the traditional mobile phone antenna can no longer meet the requirements of 4G wireless communication: multi-band and broadband, all kinds of miniaturized LTE mobile phone antennas have become the current research hotspot in the communication industry, so the small mobile phone antenna Discussion and research in the direction of multi-frequency, multi-frequency and broadband are obviously of great significance.
发明内容 Contents of the invention
本发明提供一种U形多频共面手机天线，技术方案如下： The invention provides a U-shaped multi-frequency coplanar mobile phone antenna, and the technical scheme is as follows:
U形多频共面手机天线包括基板、阻抗匹配输入传输线、U形辐射贴片、阻抗匹配短路线、左U形枝节、右U形枝节、L形枝节、L形接地线、右矩形接地线、中矩形接地线、左矩形接地线、U形耦合接地线、小矩形接地板、大矩形接地板；基板的上表面设有阻抗匹配输入传输线、U形辐射贴片、阻抗匹配短路线、左U形枝节、右U形枝节、L形枝节、L形接地线、右矩形接地线、中矩形接地线、左矩形接地线、U形耦合接地线、小矩形接地板、大矩形接地板；阻抗匹配输入传输线的右下侧和U形辐射贴片的下端边相连，U形辐射贴片的开口向左，阻抗匹配短路线左侧中点处和左U形枝节的下端边相连，左U形枝节的开口向右，左U形枝节的上端边和右U形枝节的左端边左侧相连，右U形枝节的开口向上，右U形枝节右端边一侧和L形枝节的长边右端面相连，右U形枝节右端边的另一侧和L形接地线的短边左端面相连，L形接地线的长边下端面和小矩形接地板右上端相连，右U形枝节上端、L形枝节上端和L形接地线上端均和基板的上端相连，右矩形接地线的左端和右U形枝节的右下侧面相连，右矩形接地线的右端和小矩形接地板的左上侧面相连，中矩形接地线的上端和右U形枝节的底边中点处相连，中矩形接地线的下端和大矩形接地板的上端右侧相连，左矩形接地线的上端右侧和U形耦合接地线上端边相连，U形耦合接地线的开口向左，左矩形接地线的下端和大矩形接地板的左上端点相连，小矩形接地板的下端和大矩形接地板的上端相连，小矩形接地板的右端和基板的右端重合，大矩形接地板的底端和基板的底端重合。 U-shaped multi-frequency coplanar mobile phone antenna includes substrate, impedance matching input transmission line, U-shaped radiation patch, impedance matching short circuit, left U-shaped branch, right U-shaped branch, L-shaped branch, L-shaped ground wire, right rectangular ground wire , medium rectangular grounding wire, left rectangular grounding wire, U-shaped coupling grounding wire, small rectangular grounding plate, and large rectangular grounding plate; the upper surface of the substrate is equipped with impedance matching input transmission line, U-shaped radiation patch, impedance matching short circuit, left U-shaped branch, right U-shaped branch, L-shaped branch, L-shaped grounding wire, right rectangular grounding wire, middle rectangular grounding wire, left rectangular grounding wire, U-shaped coupling grounding wire, small rectangular grounding plate, large rectangular grounding plate; Impedance The lower right side of the matching input transmission line is connected to the lower end of the U-shaped radiation patch, the opening of the U-shaped radiation patch faces to the left, and the midpoint on the left side of the impedance matching short-circuit line is connected to the lower end of the left U-shaped branch, and the left U-shaped The opening of the branch is to the right, the upper end of the left U-shaped branch is connected to the left side of the left end of the right U-shaped branch, the opening of the right U-shaped branch is upward, and the right side of the right U-shaped branch is connected to the right end of the long side of the L-shaped branch. The other side of the right end of the right U-shaped branch is connected with the left end of the short side of the L-shaped grounding wire. The lower end of the long side of the L-shaped grounding wire is connected with the upper right end of the small rectangular grounding plate. The upper end of the branch and the upper end of the L-shaped grounding line are connected to the upper end of the substrate, the left end of the right rectangular grounding line is connected to the lower right side of the right U-shaped branch, the right end of the right rectangular grounding line is connected to the upper left side of the small rectangular grounding plate, and the middle rectangular grounding line is connected to the upper left side of the small rectangular grounding plate. The upper end of the grounding wire is connected to the midpoint of the bottom edge of the right U-shaped branch, the lower end of the medium rectangular grounding wire is connected to the upper right side of the large rectangular grounding plate, and the upper right side of the left rectangular grounding wire is connected to the end of the U-shaped coupling grounding wire. The opening of the U-shaped coupling grounding wire faces to the left, the lower end of the left rectangular grounding wire is connected to the upper left end point of the large rectangular grounding plate, the lower end of the small rectangular grounding plate is connected to the upper end of the large rectangular grounding plate, and the right end of the small rectangular grounding plate is connected to the The right end of the base plate coincides, and the bottom end of the large rectangular ground plate coincides with the bottom end of the base plate.
所述的基板为玻璃纤维环氧树脂材料，基板的长度为121.6mm～122mm，宽度为60mm～61mm。所述的阻抗匹配输入传输线的长为9mm~10mm，宽为1mm~1.2mm。所述的U形辐射贴片由下矩形金属片、右矩形金属片和上矩形金属片连接而成，下矩形金属片的长为17mm~18mm，下矩形金属片的宽为4mm~5mm，右矩形金属片的长为5mm~6mm，右矩形金属片的宽为4mm~5mm，上矩形金属片的长为16mm~17mm，上矩形金属片的宽为2mm~3mm。所述的阻抗匹配短路线的长为7mm~8mm，宽为1mm~1.2mm。所述的左U形枝节上边长为36mm~37mm，上边宽为1mm~1.2mm，左边长为9mm~10mm，左边宽为1mm~1.2mm，下边长为11mm~12mm，下边宽为1mm~1.2mm；所述的右U形枝节的左边长为15mm~16mm，左边宽为1mm~1.2mm，下边长为5mm~6mm，下边宽为1mm~1.2mm，右边长为15mm~16mm，右边宽为1mm~1.2mm；所述的L形枝节的长边的长为46mm~47mm，长边的宽为1mm~1.2mm，短边的长为4mm~5mm，短边的宽为1mm~1.2mm。所述的L形接地线的左边长为9mm~10mm，左边宽为1mm~1.2mm，下边长为10mm~11mm，下边宽为1mm~1.2mm；所述的右矩形接地线的长为2mm~3mm，宽为1mm~1.2mm；所述的中矩形接地线的长为6mm~7mm，宽为1mm~1.2mm；所述的左矩形接地线的长为5mm~6mm，宽为1mm~1.2mm。所述的U形耦合接地线的上边长为22mm~23mm，上边宽为0.5mm~1mm，右边长为3mm~3.5mm，右边宽为2mm~2.5mm，下边长为10mm~11mm，下边宽为0.5mm~1mm。所述的小矩形接地板的长为10mm~11mm，宽为7mm~8mm；所述的大矩形接地板的长为100mm~102mm，宽为60mm~61mm。 The substrate is made of glass fiber epoxy resin material, the length of the substrate is 121.6mm-122mm, and the width is 60mm-61mm. The length of the impedance matching input transmission line is 9mm~10mm, and the width is 1mm~1.2mm. The U-shaped radiation patch is formed by connecting the lower rectangular metal sheet, the right rectangular metal sheet and the upper rectangular metal sheet. The length of the lower rectangular metal sheet is 17mm~18mm, and the width of the lower rectangular metal sheet is 4mm~5mm. The length of the rectangular metal sheet is 5mm~6mm, the width of the right rectangular metal sheet is 4mm~5mm, the length of the upper rectangular metal sheet is 16mm~17mm, and the width of the upper rectangular metal sheet is 2mm~3mm. The impedance-matched short-circuit line has a length of 7 mm to 8 mm and a width of 1 mm to 1.2 mm. The length of the upper side of the left U-shaped branch is 36mm~37mm, the width of the upper side is 1mm~1.2mm, the length of the left side is 9mm~10mm, the width of the left side is 1mm~1.2mm, the length of the lower side is 11mm~12mm, and the width of the lower side is 1mm~1.2mm. mm; the length of the left side of the right U-shaped branch is 15mm~16mm, the width of the left side is 1mm~1.2mm, the length of the bottom side is 5mm~6mm, the width of the bottom side is 1mm~1.2mm, the length of the right side is 15mm~16mm, and the width of the right side is 1mm~1.2mm; the length of the long side of the L-shaped branches is 46mm~47mm, the width of the long side is 1mm~1.2mm, the length of the short side is 4mm~5mm, and the width of the short side is 1mm~1.2mm. The length of the left side of the L-shaped grounding wire is 9mm~10mm, the width of the left side is 1mm~1.2mm, the length of the lower side is 10mm~11mm, and the width of the lower side is 1mm~1.2mm; the length of the right rectangular grounding wire is 2mm~ 3mm, width 1mm~1.2mm; the length of the middle rectangular grounding wire is 6mm~7mm, and the width is 1mm~1.2mm; the length of the left rectangular grounding wire is 5mm~6mm, and the width is 1mm~1.2mm . The length of the upper side of the U-shaped coupling ground wire is 22mm~23mm, the width of the upper side is 0.5mm~1mm, the length of the right side is 3mm~3.5mm, the width of the right side is 2mm~2.5mm, the length of the lower side is 10mm~11mm, and the width of the lower side is 0.5mm~1mm. The length of the small rectangular grounding plate is 10mm-11mm, and the width is 7mm-8mm; the length of the large rectangular grounding plate is 100mm-102mm, and the width is 60mm-61mm.
本发明的U形多频共面手机天线具有多频带，结构简单，体积小，质量轻，易于制作及便于集成等优点。 The U-shaped multi-frequency coplanar mobile phone antenna of the invention has the advantages of multi-frequency bands, simple structure, small volume, light weight, easy manufacture and integration, and the like.
附图说明 Description of drawings
图1是U形多频共面手机天线的结构示意图； Fig. 1 is a structural schematic diagram of a U-shaped multi-frequency coplanar mobile phone antenna;
图2是U形多频共面手机天线的回波损耗图； Fig. 2 is the return loss figure of U-shaped multi-frequency coplanar mobile phone antenna;
图3是天线在0.75GHz时的E面辐射方向图； Figure 3 is the E-plane radiation pattern of the antenna at 0.75GHz;
图4是天线在0.75GHz时的H面辐射方向图； Figure 4 is the H-surface radiation pattern of the antenna at 0.75 GHz;
图5是天线在2.6GHz时的E面辐射方向图； Figure 5 is the E-plane radiation pattern of the antenna at 2.6GHz;
图6是天线在2.6GHz时的H面辐射方向图； Figure 6 is the H-surface radiation pattern of the antenna at 2.6GHz;
图7是天线在3.5GHz时的E面辐射方向图； Figure 7 is the E-plane radiation pattern of the antenna at 3.5GHz;
图8是天线在3.5GHz时的H面辐射方向图。 Figure 8 is the H-plane radiation pattern of the antenna at 3.5 GHz.
具体实施方式 Detailed ways
如图1所示，U形多频共面手机天线，其特征在于包括基板1、阻抗匹配输入传输线2、U形辐射贴片3、阻抗匹配短路线4、左U形枝节5、右U形枝节6、L形枝节7、L形接地线8、右矩形接地线9、中矩形接地线10、左矩形接地线11、U形耦合接地线12、小矩形接地板13、大矩形接地板14；基板1的上表面设有阻抗匹配输入传输线2、U形辐射贴片3、阻抗匹配短路线4、左U形枝节5、右U形枝节6、L形枝节7、L形接地线8、右矩形接地线9、中矩形接地线10、左矩形接地线11、U形耦合接地线12、小矩形接地板13、大矩形接地板14；阻抗匹配输入传输线2的右下侧和U形辐射贴片3的下端边相连，U形辐射贴片3的开口向左，阻抗匹配短路线4左侧中点处和左U形枝节5的下端边相连，左U形枝节5的开口向右，左U形枝节5的上端边和右U形枝节6的左端边左侧相连，右U形枝节6的开口向上，右U形枝节6右端边一侧和L形枝节7的长边右端面相连，右U形枝节6右端边的另一侧和L形接地线8的短边左端面相连，L形接地线8的长边下端面和小矩形接地板13右上端相连，右U形枝节6上端、L形枝节7上端和L形接地线8上端均和基板1的上端相连，右矩形接地线9的左端和右U形枝节6的右下侧面相连，右矩形接地线9的右端和小矩形接地板13的左上侧面相连，中矩形接地线10的上端和右U形枝节6的底边中点处相连，中矩形接地线10的下端和大矩形接地板14的上端右侧相连，左矩形接地线11的上端右侧和U形耦合接地线12上端边相连，U形耦合接地线12的开口向左，左矩形接地线11的下端和大矩形接地板14的左上端点相连，小矩形接地板13的下端和大矩形接地板14的上端相连，小矩形接地板13的右端和基板1的右端重合，大矩形接地板14的底端和基板1的底端重合。 As shown in Figure 1, the U-shaped multi-frequency coplanar mobile phone antenna is characterized in that it includes a substrate 1, an impedance matching input transmission line 2, a U-shaped radiation patch 3, an impedance matching short circuit 4, a left U-shaped branch 5, and a right U-shaped Branch 6, L-shaped branch 7, L-shaped grounding wire 8, right rectangular grounding wire 9, middle rectangular grounding wire 10, left rectangular grounding wire 11, U-shaped coupling grounding wire 12, small rectangular grounding plate 13, large rectangular grounding plate 14 The upper surface of the substrate 1 is provided with an impedance matching input transmission line 2, a U-shaped radiation patch 3, an impedance matching short circuit 4, a left U-shaped branch 5, a right U-shaped branch 6, an L-shaped branch 7, an L-shaped grounding wire 8, Right rectangular grounding wire 9, middle rectangular grounding wire 10, left rectangular grounding wire 11, U-shaped coupling grounding wire 12, small rectangular grounding plate 13, large rectangular grounding plate 14; the lower right side of the impedance matching input transmission line 2 and the U-shaped radiation The lower ends of the patch 3 are connected, the opening of the U-shaped radiation patch 3 faces to the left, the midpoint on the left side of the impedance matching short-circuit line 4 is connected to the lower end of the left U-shaped branch 5, and the opening of the left U-shaped branch 5 faces to the right. The upper end of the left U-shaped branch 5 is connected to the left side of the left end of the right U-shaped branch 6, the opening of the right U-shaped branch 6 is upward, and the right side of the right U-shaped branch 6 is connected to the right end of the long side of the L-shaped branch 7 , the other side of the right end of the right U-shaped branch 6 is connected to the left end of the short side of the L-shaped grounding wire 8, the lower end of the long side of the L-shaped grounding wire 8 is connected to the upper right end of the small rectangular grounding plate 13, and the right U-shaped branch 6 The upper end, the upper end of the L-shaped branch 7 and the upper end of the L-shaped grounding wire 8 are all connected to the upper end of the substrate 1, the left end of the right rectangular grounding wire 9 is connected to the lower right side of the right U-shaped branch 6, and the right end of the right rectangular grounding wire 9 is connected to the small The upper left side of the rectangular grounding plate 13 is connected, the upper end of the middle rectangular grounding wire 10 is connected with the midpoint of the bottom edge of the right U-shaped branch 6, the lower end of the middle rectangular grounding wire 10 is connected with the upper right side of the large rectangular grounding plate 14, and the left The right side of the upper end of the rectangular grounding wire 11 is connected to the upper edge of the U-shaped coupling grounding wire 12, the opening of the U-shaped coupling grounding wire 12 faces to the left, the lower end of the left rectangular grounding wire 11 is connected to the upper left end point of the large rectangular grounding plate 14, and the small rectangular The lower end of the grounding plate 13 is connected to the upper end of the large rectangular grounding plate 14, the right end of the small rectangular grounding plate 13 coincides with the right end of the substrate 1, and the bottom of the large rectangular grounding plate 14 coincides with the bottom of the substrate 1.
所述的基板1为玻璃纤维环氧树脂材料，基板1的长度为121.6mm～122mm，宽度为60mm～61mm。所述的阻抗匹配输入传输线2的长为9mm~10mm，宽为1mm~1.2mm。所述的U形辐射贴片3由下矩形金属片、右矩形金属片和上矩形金属片连接而成，下矩形金属片的长为17mm~18mm，下矩形金属片的宽为4mm~5mm，右矩形金属片的长为5mm~6mm，右矩形金属片的宽为4mm~5mm，上矩形金属片的长为16mm~17mm，上矩形金属片的宽为2mm~3mm。所述的阻抗匹配短路线4的长为7mm~8mm，宽为1mm~1.2mm。所述的左U形枝节5上边长为36mm~37mm，上边宽为1mm~1.2mm，左边长为9mm~10mm，左边宽为1mm~1.2mm，下边长为11mm~12mm，下边宽为1mm~1.2mm；所述的右U形枝节6的左边长为15mm~16mm，左边宽为1mm~1.2mm，下边长为5mm~6mm，下边宽为1mm~1.2mm，右边长为15mm~16mm，右边宽为1mm~1.2mm；所述的L形枝节7的长边的长为46mm~47mm，长边的宽为1mm~1.2mm，短边的长为4mm~5mm，短边的宽为1mm~1.2mm。所述的L形接地线8的左边长为9mm~10mm，左边宽为1mm~1.2mm，下边长为10mm~11mm，下边宽为1mm~1.2mm；所述的右矩形接地线9的长为2mm~3mm，宽为1mm~1.2mm；所述的中矩形接地线10的长为6mm~7mm，宽为1mm~1.2mm；所述的左矩形接地线11的长为5mm~6mm，宽为1mm~1.2mm。所述的U形耦合接地线12的上边长为22mm~23mm，上边宽为0.5mm~1mm，右边长为3mm~3.5mm，右边宽为2mm~2.5mm，下边长为10mm~11mm，下边宽为0.5mm~1mm。所述的小矩形接地板13的长为10mm~11mm，宽为7mm~8mm；所述的大矩形接地板14的长为100mm~102mm，宽为60mm~61mm。 The substrate 1 is made of glass fiber epoxy resin material, the length of the substrate 1 is 121.6mm-122mm, and the width is 60mm-61mm. The length of the impedance matching input transmission line 2 is 9mm~10mm, and the width is 1mm~1.2mm. The U-shaped radiation patch 3 is formed by connecting the lower rectangular metal sheet, the right rectangular metal sheet and the upper rectangular metal sheet, the length of the lower rectangular metal sheet is 17mm-18mm, and the width of the lower rectangular metal sheet is 4mm-5mm. The length of the right rectangular metal sheet is 5mm~6mm, the width of the right rectangular metal sheet is 4mm~5mm, the length of the upper rectangular metal sheet is 16mm~17mm, and the width of the upper rectangular metal sheet is 2mm~3mm. The length of the impedance matching short circuit 4 is 7mm~8mm, and the width is 1mm~1.2mm. The length of the upper side of the left U-shaped branch 5 is 36mm~37mm, the width of the upper side is 1mm~1.2mm, the length of the left side is 9mm~10mm, the width of the left side is 1mm~1.2mm, the length of the lower side is 11mm~12mm, and the width of the lower side is 1mm~ 1.2mm; the left side of the right U-shaped branch 6 is 15mm~16mm long, the left side is 1mm~1.2mm wide, the bottom side is 5mm~6mm long, the bottom side is 1mm~1.2mm wide, and the right side is 15mm~16mm long. The width is 1mm~1.2mm; the length of the long side of the L-shaped branch 7 is 46mm~47mm, the width of the long side is 1mm~1.2mm, the length of the short side is 4mm~5mm, and the width of the short side is 1mm~ 1.2mm. The length of the left side of the L-shaped grounding wire 8 is 9mm~10mm, the width of the left side is 1mm~1.2mm, the length of the lower side is 10mm~11mm, and the width of the lower side is 1mm~1.2mm; the length of the right rectangular grounding wire 9 is 2mm~3mm, and a width of 1mm~1.2mm; the length of the middle rectangular grounding wire 10 is 6mm~7mm, and the width is 1mm~1.2mm; the length of the left rectangular grounding wire 11 is 5mm~6mm, and the width is 1mm~1.2mm. The upper side length of the U-shaped coupling grounding wire 12 is 22mm~23mm, the upper side width is 0.5mm~1mm, the right side length is 3mm~3.5mm, the right side width is 2mm~2.5mm, the lower side length is 10mm~11mm, and the lower side width 0.5mm~1mm. The length of the small rectangular ground plate 13 is 10mm-11mm, and the width is 7mm-8mm; the length of the large rectangular ground plate 14 is 100mm-102mm, and the width is 60mm-61mm.
实施例1Example 1
选择介电常数为4.4的玻璃纤维环氧树脂材料制作基板，厚度为1.6mm。基板的长度为121.6mm，宽度为60mm。阻抗匹配输入传输线的长为9mm，宽为1mm。U形辐射贴片由下矩形金属片、右矩形金属片和上矩形金属片连接而成，下矩形金属片的长为17mm，下矩形金属片的宽为4mm，右矩形金属片的长为5mm，右矩形金属片的宽为4mm，上矩形金属片的长为16mm，上矩形金属片的宽为2mm。阻抗匹配短路线的长为7mm，宽为1mm。左U形枝节上边长为36mm，上边宽为1mm，左边长为9mm，左边宽为1mm，下边长为11mm，下边宽为1mm；右U形枝节的左边长为15mm，左边宽为1mm，下边长为5mm，下边宽为1mm，右边长为15mm，右边宽为1mm；L形枝节的长边的长为46mm，长边的宽为1mm，短边的长为4mm，短边的宽为1mm。L形接地线的左边长为9mm，左边宽为1mm，下边长为10mm，下边宽为1mm；右矩形接地线的长为2mm，宽为1mm；中矩形接地线的长为6mm，宽为1mm；左矩形接地线的长为5mm，宽为1mm。U形耦合接地线的上边长为22mm，上边宽为0.5mm，右边长为3mm，右边宽为2mm，下边长为10mm，下边宽为0.5mm。小矩形接地板的长为10mm，宽为7mm；大矩形接地板的长为100mm，宽为60mm。U形多频共面手机天线的各项性能指标采用CST软件进行测试分析，所得的回波损耗曲线如附图2所示，由图可见，-6dB以下的工作频段为0.69GHz～0.82GHz和2.475GHz～3.955GHz。图3-4所示为天线在0.75GHz时的E面和H面方向图，由图可见，增益为2.7dBi，半功率波瓣宽度为102.3°。图5-6所示为天线在2.6GHz时的E面和H面方向图，由图可见，增益为4.8dBi，半功率波瓣宽度为102.5°。图7-8所示为天线在3.5GHz时的E面和H面方向图，由图可见，增益为5.3dBi，半功率波瓣宽度为28.5°。 Choose a glass fiber epoxy resin material with a dielectric constant of 4.4 to make the substrate, with a thickness of 1.6mm. The substrate has a length of 121.6 mm and a width of 60 mm. The impedance-matched input transmission line is 9mm long and 1mm wide. The U-shaped radiation patch is composed of the lower rectangular metal sheet, the right rectangular metal sheet and the upper rectangular metal sheet. The length of the lower rectangular metal sheet is 17mm, the width of the lower rectangular metal sheet is 4mm, and the length of the right rectangular metal sheet is 5mm. , the width of the right rectangular metal sheet is 4mm, the length of the upper rectangular metal sheet is 16mm, and the width of the upper rectangular metal sheet is 2mm. The length of the impedance matching short circuit is 7mm and the width is 1mm. The length of the upper side of the left U-shaped branch is 36mm, the width of the upper side is 1mm, the length of the left side is 9mm, the width of the left side is 1mm, the length of the lower side is 11mm, and the width of the lower side is 1mm; The length is 5mm, the width of the lower side is 1mm, the length of the right side is 15mm, and the width of the right side is 1mm; the length of the long side of the L-shaped branch is 46mm, the width of the long side is 1mm, the length of the short side is 4mm, and the width of the short side is 1mm . The length of the left side of the L-shaped ground wire is 9mm, the width of the left side is 1mm, the length of the bottom side is 10mm, and the width of the bottom side is 1mm; the length of the right rectangular ground wire is 2mm, and the width is 1mm; the length of the middle rectangular ground wire is 6mm, and the width is 1mm. ; The length of the left rectangular ground wire is 5mm and the width is 1mm. The length of the upper side of the U-shaped coupling ground wire is 22 mm, the width of the upper side is 0.5 mm, the length of the right side is 3 mm, the width of the right side is 2 mm, the length of the lower side is 10 mm, and the width of the lower side is 0.5 mm. The length of the small rectangular grounding plate is 10mm and the width is 7mm; the length of the large rectangular grounding plate is 100mm and the width is 60mm. The performance indicators of the U-shaped multi-frequency coplanar mobile phone antenna are tested and analyzed by CST software. The return loss curve obtained is shown in Figure 2. It can be seen from the figure that the working frequency band below -6dB is 0.69GHz to 0.82GHz and 2.475GHz～3.955GHz. Figure 3-4 shows the E-plane and H-plane pattern of the antenna at 0.75GHz. It can be seen from the figure that the gain is 2.7dBi and the half-power lobe width is 102.3°. Figure 5-6 shows the E-plane and H-plane pattern of the antenna at 2.6GHz. It can be seen from the figure that the gain is 4.8dBi and the half-power lobe width is 102.5°. Figure 7-8 shows the E-plane and H-plane pattern of the antenna at 3.5GHz. It can be seen from the figure that the gain is 5.3dBi and the half-power lobe width is 28.5°.
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