WO2012116603A1 - 一种倒f天线和移动终端 - Google Patents
一种倒f天线和移动终端 Download PDFInfo
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- WO2012116603A1 WO2012116603A1 PCT/CN2012/071304 CN2012071304W WO2012116603A1 WO 2012116603 A1 WO2012116603 A1 WO 2012116603A1 CN 2012071304 W CN2012071304 W CN 2012071304W WO 2012116603 A1 WO2012116603 A1 WO 2012116603A1
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- Prior art keywords
- antenna
- inverted
- mobile terminal
- angled
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
Definitions
- the present invention relates to the field of communications, and in particular, to an Inverted-F Antenna Inverted (IFA) and a mobile terminal.
- IFA Inverted-F Antenna Inverted
- antennas as front-end devices of communication systems, have received more and more attention and more improvements, especially in terms of bandwidth capacity.
- the requirements for antenna modeling are getting higher and higher.
- the antenna As many mobile phones in the past are thicker and larger in size, this is a good state for the antenna, which allows the antenna to have more space, thicker thickness and better performance.
- mobile phones are getting thinner and thinner, and the size of mobile phones is also very limited, especially for some ultra-thin and compact mobile phones for women, so the antenna is put forward higher requirements, in limited space and very short. Achieve superior performance at high altitudes.
- microstrip antennas Compared with general microwave antennas, microstrip antennas have many advantages, such as low cost, light weight, simple processing, easy installation, and compatibility with integrated circuits. It is widely used in missile launchers, aircraft, phased array antennas, and portable wireless transceivers. However, it also has some shortcomings such as bandwidth and axial ratio. Generally, the bandwidth of a microstrip antenna is very narrow (less than 10%), and the fatal shortcoming makes the microstrip antenna unable to meet the needs of modern communication systems.
- PIFA Planar Inverted-F Antenna Inverted
- IFA Inverted-F Antenna Inverted
- Monopole Antenna There are several types of mobile phone antennas: PIFA (Planar Inverted-F Antenna Inverted), IFA (Inverted-F Antenna Inverted) and Monopole Antenna.
- the PIFA antenna is deformed by the microstrip antenna, and the IFA antenna is deformed by the PIFA antenna, so the microstrip antenna has disadvantages.
- the IFA antenna also has.
- an inverted F antenna including:
- the radiating body of the inverted-F antenna is arranged in a serpentine manner in the clearance area of the printed circuit board of the mobile terminal.
- the inverted F antenna is grounded at one end, and a point on the antenna is connected to the coaxial feed line.
- At least part of the line segments on the inverted F antenna have the same triangular structure, and two of the triangular structures are formed by a partial line segment of the inverted F antenna.
- the triangular structure is a right-angled triangular structure, and a part of the line segment of the inverted-F antenna constitutes a right-angled side and a hypotened side of the right-angled triangle.
- the direction of the line segment of the right-angled side of the right-angled triangle is perpendicular to the direction of the IFA antenna.
- the length of the inverted F antenna is one quarter of the operating wavelength of the antenna.
- the operating wavelength ⁇ of the inverted F antenna is calculated by the following formula:
- c is the speed of light
- f is the center frequency of the inverted F antenna
- f is the printed circuit of the mobile phone The dielectric constant of the board.
- the present invention also provides a mobile terminal comprising an inverted F antenna as described above.
- the above scheme applies the shape of the serpentine line to the IFA antenna, which expands the bandwidth to a large extent, and also saves the antenna space, is small in size, and light in weight, and meets the needs of the compact size of the current mobile phone.
- the structure is simple, easy to connect with other circuits or systems, easy to manufacture, low in cost, and expected to have good application prospects and good economic benefits.
- FIG. 1 is a side elevational view of an IFA antenna in accordance with an embodiment of the present invention.
- FIG. 2 is a top plan view of an IFA antenna in accordance with an embodiment of the present invention. Preferred embodiment of the invention
- the radiating body of the IFA antenna is arranged in a serpentine manner in a clearance area of a PCB (Printed Circuit Board) board of a mobile terminal such as a mobile phone.
- a PCB printed Circuit Board
- One end of the IFA antenna is grounded, and a point on the antenna is connected to the coaxial feed line.
- the length of the antenna is one quarter of the operating wavelength of the antenna; wherein the operating wavelength ⁇ of the antenna is calculated by the following formula:
- c is the speed of light
- f is the center frequency of the antenna
- f is the dielectric constant of the PCB.
- the antenna is arranged in a clearance area of the mobile phone PCB board by means of a serpentine line, meaning that at least part of the line segments on the antenna have the same triangular structure, and two of the triangular structures
- the strip side is composed of a partial line segment of the antenna.
- the triangular structure is a right-angled triangular structure, and a part of the line segment of the antenna constitutes a right-angled side and a hypotened side of the right-angled triangle, and the direction of the line segment constituting the right-angled side is perpendicular to the direction of the antenna.
- the design parameters of the present invention are theoretical simulations and experimental results selected on the basis of a certain theoretical analysis, which show that the effect is good.
- the experimental results show that the antenna has a -10dB bandwidth of 50% and a working frequency range of 1.5GHz to 2.47GHz. Compared with the usual microstrip antenna, the bandwidth is less than 10%. 5 times, (testing other parameters) has a very large improvement, and the bandwidth improvement is more obvious.
- the details and operation of the specific device according to the present invention will be described in detail below with reference to FIG. It mainly includes: antenna radiation body 1, PCB board 2, PCB ground layer 3 and antenna grounding column 4. As shown in Fig. 2, the point where the IFA antenna is connected to the coaxial feeder is the antenna feed point B; the point where the IFA antenna is connected to the antenna ground column (4) is the ground point A, and the IFA antenna is grounded through the ground point A.
- the test results show that when the IFA antenna is arranged in a serpentine line, the bandwidth improvement is more obvious.
- the total volume is 90mm*40mm* 1.4mm and weighs less than 150g.
- the above embodiment applies the serpentine shape to the IFA antenna, which expands the bandwidth to a large extent, and also saves the antenna space, is small in size, and light in weight, and meets the needs of the compact size of the current mobile phone.
- the structure is simple, easy to connect with other circuits or systems, easy to manufacture, low in cost, and expected to have good application prospects, and achieve good economic benefits.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Waveguide Aerials (AREA)
Abstract
本发明公开了一种倒F天线，包括：所述倒F天线的辐射主体以蛇形线的方式布置在手机印制电路板的净空区中。本发明将蛇形线形状应用到IFA天线中，在较大程度上拓展了其带宽，同时也节省了天线空间，体积小，重量轻，满足现在手机造型小巧的需要。另外，其结构简单，易于和其他电路或系统连接，制作容易，成本低，可望有好的应用前景，并取得良好的经济效益。
Description
一种倒 F天线和移动终端
技术领域
本发明涉及通信领域， 尤其涉及一种倒 F 天线 （Inverted-F Antenna Inverted , 简称为 IFA )和移动终端。 背景技术
随着现代通信技术的发展， 天线作为通信系统的前端设备， 已经受到越 来越多的重视以及更多的改进， 尤其是在其带宽容量上。 而对于手机天线来 说， 随着人们审美观念的改变， 对天线造型的要求也越来越高。 如以前的很 多手机都比较厚， 尺寸也很宽大， 这对天线来说是一个很好的状态， 可以让 天线的空间更大， 厚度更厚， 性能上面也能得到保证。 但现在的手机越来越 薄， 手机尺寸也受到了很大的限制， 尤其是针对女性的一些超薄小巧的手机， 因此对天线提出了更高的要求， 以在有限的空间以及很矮的高度情况下实现 较优的性能。
与一般的微波天线相比， 微带天线具有很多优点， 如造价低、 重量轻、 加工简单、 安装方便等， 并且能与集成电路相兼容等。 它广泛应用于导弹发 射器、 飞行器、 相控阵天线以及便携式无线收发机中。 但是， 它也有一些缺 点， 如带宽和轴比。 通常， 微带天线的带宽很窄 （小于 10% ) ， 带宽窄这个 致命的缺点使得微带天线不能满足现代通信系统的需要。
手机天线有以下几种类型： PIFA ( Planar Inverted-F Antenna Inverted, 平 面倒 F天线） 、 IFA ( Inverted-F Antenna Inverted, 倒 F天线 ) 以及单极天线。
PIFA天线是由微带天线变形过来的， 而 IFA天线是由 PIFA天线变形而来， 所以微带天线有的缺点 IFA天线也有。
对于应用在手机里面的 IFA天线来说， 拓展其带宽是必要的。 目前， 已 经有很多方法来改进微带天线的带宽， 如增加贴片的高度， 用两个辐射贴片 实现双频， 在辐射贴片上开槽产生两个接地的谐振模式以及用锥形的辐射贴 片等。 这些方法都可以有效地改进微带天线的带宽。 也可以通过改变地的结
构来增加天线带宽， 如 T型地、 H型地。
上述拓宽带宽的方式在具体实施时会受到空间上面的限制， 尤其对于尺 寸较小的手机来说， 要实现起来非常的困难。 发明内容
本发明的目的在于提供一种 IFA天线， 以解决现有的 IFA天线带宽窄的 缺陷。
为解决上述问题， 本发明提供了一种倒 F天线， 包括：
所述倒 F天线的辐射主体以蛇形线的方式布置在移动终端印制电路板的 净空区中。
可选的，
所述倒 F天线一端接地， 该天线上一点与同轴馈线相连。
可选的，
所述倒 F天线上至少部分线段具有相同的三角形结构， 所述三角形结构 中的两条边由所述倒 F天线的部分线段构成。
可选的，
所述三角形结构为直角三角形结构， 所述倒 F天线的部分线段构成了所 述直角三角形的一个直角边和斜边。
可选的，
所述直角三角形的直角边的线段方向与所述 IFA天线的走向相互垂直。 可选的，
所述倒 F天线的长度为该天线的工作波长的四分之一。
可选的，
所述倒 F天线的工作波长 λ釆用下述公式计算：
其中： c为光速； f为所述倒 F天线的中心频率； f为所述手机印制电路
板的介电常数。
本发明还提供一种移动终端， 包括如上面所述的倒 F天线。
上述方案将蛇形线形状应用到 IFA天线中，在较大程度上拓展了其带宽， 同时也节省了天线空间， 体积小， 重量轻， 满足现在手机造型小巧的需要。 另外， 其结构简单， 易于和其他电路或系统连接， 制作容易， 成本低， 可望 有好的应用前景， 并取得良好的经济效益。 附图概述
图 1为本发明实施例中 IFA天线的侧视图；
图 2为本发明实施例中 IFA天线的俯视图。 本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是， 在 不冲突的情况下， 本申请中的实施例及实施例中的特征可以相互任意组合。
在本实施例中， IFA天线的辐射主体以蛇形线的方式布置在移动终端（如 手机 )的 PCB ( Printed Circuit Board, 印制电路板 )板的净空区。 该 IFA天线 一端接地， 该天线上一点与同轴馈线相连。 该天线的长度为该天线的工作波 长的四分之一； 其中， 天线的工作波长 λ釆用下述公式计算：
其中： c为光速； f为天线的中心频率； f为 PCB板的介电常数。
在本发明的另一实施例中， 该天线釆用蛇形线的方式布置在手机 PCB板 的净空区中， 是指： 该天线上至少部分线段具有相同的三角形结构， 该三角 形结构中的两条边由该天线的部分线段构成。 较佳地， 该三角形结构为直角 三角形结构， 天线的部分线段构成了该直角三角形的一个直角边和斜边， 且 该构成该直角边的线段方向与该天线的走向相互垂直。
本发明的设计参数是在一定理论分析的基础上选择的理论仿真和实验结 果均表明效果良好。 实验结果表明， 天线 -10dB 带宽为 50%, 工作频段为 1.5GHz到 2.47GHz, 相对于平时微带天线不到 10%的带宽， 带宽增加为原来
的 5倍， （其他参数的测试）有非常大的提升， 带宽改善较明显。 下面结合图 1详细说明依据本发明提出的具体装置的细节及工作情况。 主要包括： 天线辐射主体 1、 PCB板 2、 PCB地层 3及天线接地柱 4。 如图 2 所示， IFA天线与同轴馈线相连接的点是天线馈点 B; IFA天线与天线接地 柱（ 4 )相连接的点是接地点 A, IFA天线通过接地点 A接地。
具有蛇形线结构的天线辐射主体放置在矩形 PCB板的净空区，其中 PCB 板的尺寸 Ll*L2=40mm x 90mm, 厚度为 1mm, 净空区的长度 L3=12mm。 接 地点 A距离馈点 B的距离 b=4mm, 其中接地臂的长度 a=5mm。 这里一共釆 用了四个变形的直角三角形结构， 在每一个直角三角形结构中， c=2mm, d=3mm, 该变形蛇形线的长度决定了天线的工作频段。
测试结果表明： 该 IFA天线按照蛇形线方式布置时， 带宽改善较明显。 总体积为 90mm*40mm* 1.4mm, 重量不足 150克。
以上所述仅为本发明的优选实施例而已， 并非用于限定本发明的保护范 围。 根据本发明的发明内容， 还可有其他多种实施例， 在不背离本发明精神 改变和变形， 凡在本发明的精神和原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。
工业实用性
上述实施方式将蛇形线形状应用到 IFA天线中， 在较大程度上拓展了其 带宽， 同时也节省了天线空间， 体积小， 重量轻， 满足现在手机造型小巧的 需要。 另外， 其结构简单， 易于和其他电路或系统连接， 制作容易， 成本低, 可望有好的应用前景， 并取得良好的经济效益。
Claims
1、 一种倒 F天线， 其特征在于：
所述倒 F天线的辐射主体以蛇形线的方式布置在移动终端印制电路板的 净空区中。
2、 如权利要求 1所述的倒 F天线， 其中：
所述倒 F天线一端接地， 该天线上一点与同轴馈线相连。
3、 如权利要求 1所述的倒 F天线， 其中：
所述倒 F天线上至少部分线段具有相同的三角形结构， 所述三角形结构 中的两条边由所述倒 F天线的部分线段构成。
4、 如权利要求 3所述的倒 F天线， 其中：
所述三角形结构为直角三角形结构， 所述倒 F天线的部分线段构成了所 述直角三角形的一个直角边和斜边。
5、 如权利要求 4所述的倒 F天线， 其中：
所述直角三角形的直角边的线段方向与所述 IFA天线的走向相互垂直。
6、 如权利要求 1所述的倒 F天线， 其中：
所述倒 F天线的长度为该天线的工作波长的四分之一。
7、 如权利要求 6所述的倒 F天线， 其中：
所述倒 F天线的工作波长 λ釆用下述公式计算：
其中： c为光速； f为所述倒 F天线的中心频率； f为所述移动终端印制 电路板的介电常数。
8、 如权利要求 1-7所述的倒 F天线， 其中， 所述移动终端为手机。
9、 一种移动终端， 其包括如权利要求 1-7任一项所述的倒 F天线。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200532363U CN202019051U (zh) | 2011-03-02 | 2011-03-02 | 一种倒f天线 |
| CN201120053236.3 | 2011-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012116603A1 true WO2012116603A1 (zh) | 2012-09-07 |
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ID=44812719
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2012/071304 Ceased WO2012116603A1 (zh) | 2011-03-02 | 2012-02-20 | 一种倒f天线和移动终端 |
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| Country | Link |
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| CN (1) | CN202019051U (zh) |
| WO (1) | WO2012116603A1 (zh) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11369730B2 (en) | 2016-09-29 | 2022-06-28 | Smith & Nephew, Inc. | Construction and protection of components in negative pressure wound therapy systems |
| US11974903B2 (en) | 2017-03-07 | 2024-05-07 | Smith & Nephew, Inc. | Reduced pressure therapy systems and methods including an antenna |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202019051U (zh) * | 2011-03-02 | 2011-10-26 | 中兴通讯股份有限公司 | 一种倒f天线 |
| WO2017132860A1 (zh) * | 2016-02-03 | 2017-08-10 | 青勇 | 一种 v 形天线结构 |
| CN106093597B (zh) * | 2016-05-28 | 2018-08-17 | 河北工业大学 | 利用印制电路板制作的光电式电场近场探头 |
| CN107887692A (zh) * | 2017-10-27 | 2018-04-06 | 苏州景昱医疗器械有限公司 | 微带天线及应用该天线的植入式医疗系统 |
| CN211858882U (zh) * | 2020-04-03 | 2020-11-03 | 清研讯科（北京）科技有限公司 | 一种天线和电子设备 |
| CN111193105A (zh) * | 2020-04-09 | 2020-05-22 | 杭州涂鸦信息技术有限公司 | 一种辐射体为异形的天线及设备 |
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2011
- 2011-03-02 CN CN2011200532363U patent/CN202019051U/zh not_active Expired - Lifetime
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2012
- 2012-02-20 WO PCT/CN2012/071304 patent/WO2012116603A1/zh not_active Ceased
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| US20050264447A1 (en) * | 2004-05-27 | 2005-12-01 | Chi-Shen Shan | Structure for inverted F plane antenna |
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| US11369730B2 (en) | 2016-09-29 | 2022-06-28 | Smith & Nephew, Inc. | Construction and protection of components in negative pressure wound therapy systems |
| US12420006B2 (en) | 2016-09-29 | 2025-09-23 | Smith & Nephew, Inc. | Construction and protection of components in negative pressure wound therapy systems |
| US11974903B2 (en) | 2017-03-07 | 2024-05-07 | Smith & Nephew, Inc. | Reduced pressure therapy systems and methods including an antenna |
| US12447059B2 (en) | 2017-03-07 | 2025-10-21 | Smith & Nephew, Inc. | Reduced pressure therapy systems and methods including an antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN202019051U (zh) | 2011-10-26 |
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