CN104577300A - Multi-branch mobile terminal antenna and mobile terminal thereof - Google Patents
Multi-branch mobile terminal antenna and mobile terminal thereof Download PDFInfo
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Abstract
本发明提出一种多分支移动终端天线,包括一主天线体与一寄生天线体,其特征在于:所述寄生天线体包括有两路或两路以上寄生分支。本发明引入双分支或多分支寄生天线体,通过强、弱耦合、多分支的方式形成多个谐振点,能有效拓展带宽。同时,还提出应用上述多分支移动终端天线的移动终端,具备良好的带宽拓展性能,可适应多频段应用需求。
The present invention proposes a multi-branch mobile terminal antenna, including a main antenna body and a parasitic antenna body, characterized in that: the parasitic antenna body includes two or more parasitic branches. The invention introduces a double-branch or multi-branch parasitic antenna body, forms multiple resonance points through strong and weak coupling, and multi-branch mode, and can effectively expand the bandwidth. At the same time, it is also proposed that the mobile terminal using the above-mentioned multi-branch mobile terminal antenna has good bandwidth expansion performance and can adapt to the application requirements of multiple frequency bands.
Description
技术领域technical field
本发明涉及一种多分支移动终端天线及其移动终端The invention relates to a multi-branch mobile terminal antenna and its mobile terminal
背景技术Background technique
移动终端的小型化、多频化对天线设计提出了严峻的挑战。例如,普通的多频段天线有着高、低频分支在天线性能上互相制约的缺点,在设计上一般采用低频分支包围高频分支,形成“G”字型结构的方案。但上述“G”字型结构存在明显的缺点:一方面制约着低频带宽,另一方面要求较大的净空面积。随着移动终端厚度的变小,天线支架的顶面高度也变得越来越低,天线的发射、接收只能利用净空的端面了。但由于移动终端内部紧凑的设计,使得天线可利用的净空端面较小或呈长条形,如采用上述“G”字型结构天线就不能达到最佳的低频带宽。The miniaturization and multi-frequency of mobile terminals pose severe challenges to antenna design. For example, ordinary multi-band antennas have the disadvantage that the high-frequency and low-frequency branches restrict each other in terms of antenna performance. In design, the low-frequency branch is generally used to surround the high-frequency branch to form a "G"-shaped structure. However, the above-mentioned "G"-shaped structure has obvious disadvantages: on the one hand, it restricts the low-frequency bandwidth, and on the other hand, it requires a large headroom area. As the thickness of the mobile terminal becomes smaller, the height of the top surface of the antenna bracket becomes lower and lower, and the transmitting and receiving of the antenna can only use the end surface of the clearance. However, due to the compact design inside the mobile terminal, the usable clearance end face of the antenna is small or long-striped. If the above-mentioned "G"-shaped antenna is used, the optimal low-frequency bandwidth cannot be achieved.
发明内容Contents of the invention
本发明的第一目的在于:针对通信天线的高、低频段分支在性能上互相制约的问题,提供一种结构简单、电气性能优良的通信天线。The first object of the present invention is to provide a communication antenna with simple structure and excellent electrical performance for the problem that the performance of the high-frequency and low-frequency branches of the communication antenna is mutually restricted.
其采用的技术方案如下:The technical scheme adopted is as follows:
一种多分支移动终端天线,包括一主天线体与一寄生天线体,其特征在于:所述寄生天线体包括有两路或两路以上寄生分支。A multi-branch mobile terminal antenna includes a main antenna body and a parasitic antenna body, characterized in that the parasitic antenna body includes two or more parasitic branches.
上述方案中,主辐射体的高频分支对应产生一高频谐振点,寄生天线体通过耦合可对应产生两个或两个以上高频谐振点,大大扩展了高频带宽,解决了移动终端高频段带宽普遍较窄的问题。In the above scheme, the high-frequency branch of the main radiator corresponds to a high-frequency resonance point, and the parasitic antenna body can generate two or more high-frequency resonance points through coupling, which greatly expands the high-frequency bandwidth and solves the high-frequency problem of mobile terminals. The frequency band bandwidth is generally narrow.
作为上述方案的改进,本发明还包括如下技术方案:As an improvement of the above scheme, the present invention also includes the following technical schemes:
进一步,所述寄生天线体包括一靠近所述主天线体的第一寄生分支,以及远离所述主天线体的第二寄生分支。所述的第一寄生分支、第二寄生分支对应产生第一谐振点、第二谐振点,独立谐振点使得各频段之间的影响得到进一步的降低。Further, the parasitic antenna body includes a first parasitic branch close to the main antenna body, and a second parasitic branch far away from the main antenna body. The first parasitic branch and the second parasitic branch correspondingly generate a first resonance point and a second resonance point, and independent resonance points further reduce the influence between frequency bands.
进一步,所述主天线体设有一高频分支,所述第一寄生分支靠近所述高频分支,并与之形成耦合。Further, the main antenna body is provided with a high-frequency branch, and the first parasitic branch is close to the high-frequency branch and forms a coupling with it.
进一步,所述第一寄生分支沿所述高频分支延伸方向延伸。上述方案可以保证天线整体较扁长形,而不像传统“G”字型天线,能更好地利用终端上的净空面积。Further, the first parasitic branch extends along the extending direction of the high frequency branch. The above-mentioned solution can ensure that the overall antenna is flat and elongated, unlike the traditional "G"-shaped antenna, and can better utilize the clearance area on the terminal.
进一步,所述主天线体的高频分支与第一寄生分支之间连接有电容或容性元件。Further, a capacitor or a capacitive element is connected between the high frequency branch of the main antenna body and the first parasitic branch.
进一步,所述主天线体的高频分支与第一寄生分支之间形成有一半封闭缝隙,所述缝隙的上方或下方设置有耦合片。Further, a semi-closed gap is formed between the high-frequency branch of the main antenna body and the first parasitic branch, and a coupling piece is arranged above or below the gap.
上述方案中,通过增设电容、容性元件或耦合片,用于增强高频辐射分支与第一寄生分支之间的耦合强度,以满足辐射的需求。同时,也使得天线信号的调试更为方便、灵活。In the above solution, the coupling strength between the high-frequency radiation branch and the first parasitic branch is enhanced by adding a capacitor, a capacitive element or a coupling plate, so as to meet the requirement of radiation. At the same time, it also makes the debugging of the antenna signal more convenient and flexible.
进一步,所述寄生天线体还包括一第三寄生分支,该第三寄生分支生成于第一寄生分支与第二寄生分支的连接部,所述第三寄生分支靠近第一寄生分支并沿其延伸方向延伸。Further, the parasitic antenna body further includes a third parasitic branch, the third parasitic branch is generated at the connecting portion of the first parasitic branch and the second parasitic branch, and the third parasitic branch is close to the first parasitic branch and extends along it direction extension.
根据实际应用和频段需求,可通过增加寄生天线分支以增加对应的高频谐振点,拓展高频带宽。而且,也可以最大限度地降低新增频段与其它频段的影响。According to the actual application and frequency band requirements, the high-frequency bandwidth can be expanded by adding parasitic antenna branches to increase the corresponding high-frequency resonance points. Moreover, the influence of the newly added frequency band and other frequency bands can also be minimized.
综上所述,本发明的创新点在于:In summary, the innovation of the present invention is:
1、引入双分支或多分支寄生天线体,通过强、弱耦合、不同分支的方式形成多个谐振点,能有效拓展带宽。同时,除主辐射体的高频谐振点外,其余高频谐振点由寄生天线体产生,进一步降低高低频段信号之间的干扰,比普通天线更容易兼顾高频段和低频段,降低天线的环境要求。1. Introduce a double-branch or multi-branch parasitic antenna body, and form multiple resonance points through strong and weak coupling and different branches, which can effectively expand the bandwidth. At the same time, except for the high-frequency resonance point of the main radiator, the rest of the high-frequency resonance points are generated by the parasitic antenna body, which further reduces the interference between high and low frequency band signals. Require.
2、独立寄生天线体的设计,增加了各个谐振点之间的独立性,使天线具有较强的抗干扰性,便于进行各频段的独立调试。2. The design of independent parasitic antenna body increases the independence between each resonance point, makes the antenna have strong anti-interference, and is convenient for independent debugging of each frequency band.
3、同时,合理设置寄生天线体与天线本体之间的缝隙大小以及增设耦合元件,能有效调整谐振点的关联度,从而优化提高其联合带宽。3. At the same time, reasonably setting the size of the gap between the parasitic antenna body and the antenna body and adding coupling elements can effectively adjust the correlation degree of the resonance point, thereby optimizing and improving its joint bandwidth.
本发明的第二目的在于提出应用上述多分支移动终端天线的移动终端,所述移动终端设有边框,其特征在于:所述多分支移动终端天线在安装时进行弯折,弯折后所述高频分支与第一寄生分支位于终端主板上的净空端面投影区内,所述低频分支沿终端边框的内壁延伸,所述第二寄生分支沿终端边框的内壁延伸。The second object of the present invention is to propose a mobile terminal using the above-mentioned multi-branch mobile terminal antenna. The high-frequency branch and the first parasitic branch are located in the projection area of the clear end surface on the main board of the terminal, the low-frequency branch extends along the inner wall of the terminal frame, and the second parasitic branch extends along the inner wall of the terminal frame.
上述方案合理利用终端的净空端面与窄边顶面,即满足辐射需在净空大的部位,也灵活地适合终端的外观设计。天线避免了“G”字型结构,更合理地利用了终端净空端面的面积,充分地适应了移动终端越来越薄而使顶面不可用的趋势。The above solution rationally utilizes the clear end surface and the narrow top surface of the terminal, which satisfies the requirement of radiation in the part with large clearance and flexibly suits the appearance design of the terminal. The antenna avoids the "G"-shaped structure, and makes more reasonable use of the area of the clear end surface of the terminal, fully adapting to the trend that the top surface of the mobile terminal is becoming thinner and thinner.
进一步,所述第三寄生分支位于终端主板上的净空端面投影区内。Further, the third parasitic branch is located in the projection area of the clear end face on the main board of the terminal.
上述方案的多谐振点设计,使移动终端具备良好的带宽拓展性能,可适应终端的多频段应用需求。The multi-resonance point design of the above solution enables the mobile terminal to have good bandwidth expansion performance, and can adapt to the multi-band application requirements of the terminal.
附图说明Description of drawings
图1为天线辐射体结构示意图一。FIG. 1 is a schematic diagram of the structure of an antenna radiator.
图2为天线辐射体结构示意图二。FIG. 2 is a second schematic diagram of the structure of the antenna radiator.
图3为实施方式一结构示意图。Fig. 3 is a schematic structural diagram of Embodiment 1.
图4为实施方式一的天线驻波比曲线图。FIG. 4 is a graph of the standing wave ratio of the antenna in the first embodiment.
图5为实施方式二结构示意图。Fig. 5 is a schematic structural diagram of Embodiment 2.
图6为实施方式三结构示意图。Fig. 6 is a schematic structural diagram of Embodiment 3.
具体实施方式Detailed ways
如下结合附图1至6,描述本发明的技术方案:The technical scheme of the present invention is described as follows in conjunction with accompanying drawings 1 to 6:
如图1所示,一种多分支移动终端天线,包括设有一高频分支1与一低频分支2的主天线体,高频分支1与低频分支2沿相同方向延伸,两者之间形成缝隙6-2;所述主天线体还包括一与终端主板的信号源连接的馈电端9,一与终端主板的信号地连接的第一接地端8-1,所述馈电端9与第一接地端8-1之间形成缝隙6-1;以及设有两路或两路以上分支的寄生天线体,所述寄生天线体包括一与终端主板的信号地连接的第二接地端8-2,所述寄生天线体上各路分支分别与所述高频辐射分支1形成耦合。As shown in Figure 1, a multi-branch mobile terminal antenna includes a main antenna body with a high-frequency branch 1 and a low-frequency branch 2, the high-frequency branch 1 and the low-frequency branch 2 extend in the same direction, and a gap is formed between them 6-2; the main antenna body also includes a feed terminal 9 connected to the signal source of the terminal main board, a first ground terminal 8-1 connected to the signal ground of the terminal main board, and the feed terminal 9 is connected to the first ground terminal 8-1. A gap 6-1 is formed between a ground terminal 8-1; and a parasitic antenna body with two or more branches, the parasitic antenna body includes a second ground terminal 8- connected to the signal ground of the terminal board 2. Each branch on the parasitic antenna body forms a coupling with the high-frequency radiation branch 1 respectively.
在天线净空较大情况下也可以省略所述的第一接地端8-1。The first ground terminal 8-1 may also be omitted in the case of a large antenna clearance.
上述方案中,主辐射体的高频分支1对应产生一个高频谐振点,寄生天线体通过耦合可对应产生两个或两个以上高频谐振点,大大扩展了高频带宽,解决了移动终端高频段带宽普遍较窄的问题。In the above scheme, the high-frequency branch 1 of the main radiator corresponds to a high-frequency resonance point, and the parasitic antenna body can generate two or more high-frequency resonance points through coupling, which greatly expands the high-frequency bandwidth and solves the problem of mobile terminals. The high-band bandwidth is generally narrow.
作为上述方案的改进:As an improvement on the above scheme:
进一步,所述寄生天线体包括一靠近所述主天线体的高频分支1的第一寄生分支3,以及远离所述主天线体的高频分支的第二寄生分支4,所述第一寄生分支3沿所述高频分支1延伸方向延伸。Further, the parasitic antenna body includes a first parasitic branch 3 close to the high frequency branch 1 of the main antenna body, and a second parasitic branch 4 far away from the high frequency branch of the main antenna body, the first parasitic branch The branch 3 extends along the extending direction of the high frequency branch 1 .
所述第一寄生支3为内寄生高频辐射体,其紧靠着所述高频辐射分支1延伸并可根据实际调节所需长度,。所述第一寄生分支3与高频分支1之间形成强耦合,其耦合强度可通过所述第三缝隙6-3的宽度调节。所述第二寄生分支4为外寄生高频辐射体,所述第二寄生分支4与高频分支1之间形成弱耦合。由于第一寄生分支3与第二寄生分支4在位置上远离所述的低频辐射分支2,故高、低频段之间的影响得到进一步的降低。The first parasitic branch 3 is an internal parasitic high-frequency radiator, which extends close to the high-frequency radiation branch 1 and whose length can be adjusted according to actual conditions. A strong coupling is formed between the first parasitic branch 3 and the high frequency branch 1, and the coupling strength can be adjusted by the width of the third slit 6-3. The second parasitic branch 4 is an external parasitic high-frequency radiator, and a weak coupling is formed between the second parasitic branch 4 and the high-frequency branch 1 . Since the first parasitic branch 3 and the second parasitic branch 4 are located far away from the low frequency radiation branch 2, the influence between high and low frequency bands is further reduced.
进一步,所述高频分支1与第一寄生分支3之间可连接有电容或容性元件。Further, a capacitance or a capacitive element may be connected between the high frequency branch 1 and the first parasitic branch 3 .
进一步,所述高频分支1与第一寄生分支3之间形成有一半封闭缝隙6-3,所述缝隙的上方或下方设置可有耦合片,所述耦合片一般为金属片。Further, a semi-closed gap 6-3 is formed between the high-frequency branch 1 and the first parasitic branch 3, and there may be a coupling piece above or below the gap, and the coupling piece is generally a metal piece.
上述方案中,通过增设电容、容性元件或耦合片,用于增强高频辐射分支与第一寄生分支之间的耦合强度,以满足辐射的需求。同时,也使得天线信号的调试更为方便、灵活。In the above solution, the coupling strength between the high-frequency radiation branch and the first parasitic branch is enhanced by adding a capacitor, a capacitive element or a coupling plate, so as to meet the requirement of radiation. At the same time, it also makes the debugging of the antenna signal more convenient and flexible.
如图2所示,所述寄生天线体还包括一第三寄生分支5,该第三寄生分支生5成于第一寄生分支3与第二寄生分支4的连接部,其靠近并沿所述第一寄生分支3延伸方向延伸,并形成半封闭缝隙6-4。As shown in Figure 2, the parasitic antenna body also includes a third parasitic branch 5, which is formed at the connecting portion of the first parasitic branch 3 and the second parasitic branch 4, which is close to and along the The first parasitic branch 3 extends in the extending direction and forms a semi-closed gap 6-4.
根据实际应用和频段需求,可通过增加寄生天线分支以增加对应的高频谐振点,拓展高频带宽。而且,也可以最大限度地降低新增高频频段对低频段的影响。According to the actual application and frequency band requirements, the high-frequency bandwidth can be expanded by adding parasitic antenna branches to increase the corresponding high-frequency resonance points. Moreover, the impact of the newly added high-frequency band on the low-frequency band can also be minimized.
作为上述方案的一种推演,主天线体上可省略高频分支,所述第一寄生分支直接与主天线体低频分支耦合,天线整体呈扁长形。As a deduction of the above solution, the high-frequency branch can be omitted on the main antenna body, the first parasitic branch is directly coupled with the low-frequency branch of the main antenna body, and the overall antenna is flat and long.
图3所示,本发明的具体实施方式一:As shown in Fig. 3, a specific embodiment of the present invention one:
一种应用上述多分支移动终端天线的移动终端,所述移动终端包括一窄边边框。所述多分支移动终端天线在安装时其平板部7、第一接地端8-1、第二接地端8-2以及馈电端9进行弯折,弯折后所述高频辐射分支1与第一寄生分支3位于终端主板10上的净空端面投影区内,所述低频辐射分支2沿窄边边框的内壁顶面延伸,所述第二寄生分支沿窄边边框的内壁顶面延伸。A mobile terminal using the above-mentioned multi-branch mobile terminal antenna, the mobile terminal includes a narrow frame. When the multi-branch mobile terminal antenna is installed, its flat part 7, first ground terminal 8-1, second ground terminal 8-2 and feed terminal 9 are bent, and after bending, the high-frequency radiation branch 1 and The first parasitic branch 3 is located in the projection area of the clear end surface on the terminal main board 10, the low-frequency radiation branch 2 extends along the top surface of the inner wall of the narrow frame, and the second parasitic branch extends along the top surface of the inner wall of the narrow frame.
上述方案合理利用终端的净空端面与窄边顶面,即满足辐射需流动,也灵活地适合终端的外观设计。天线避免了“G”字型结构,更合理地利用了终端净空端面的面积,充分地适应了移动终端越来越薄而使顶面不可用的趋势。The above solution rationally utilizes the clear end surface and the narrow top surface of the terminal, which not only satisfies the required flow of radiation, but also flexibly fits the appearance design of the terminal. The antenna avoids the "G"-shaped structure, and makes more reasonable use of the area of the clear end surface of the terminal, fully adapting to the trend that the top surface of the mobile terminal is becoming thinner and thinner.
如图4所示,实施例一的天线驻波比曲线图,高频分支1产生的第一谐振点A、第一寄生分支3产生的第二谐振点B,以及第二寄生分支4产生的第三谐振点C。从曲线图中可以看出,高频分支1与各寄生分支分别对应一个谐振点,使移动终端具备良好的带宽拓展性能,可适应终端的多频段应用需求。As shown in Figure 4, the antenna standing wave ratio curve diagram of Embodiment 1, the first resonance point A generated by the high-frequency branch 1, the second resonance point B generated by the first parasitic branch 3, and the second resonance point B generated by the second parasitic branch 4 The third resonance point C. It can be seen from the graph that the high-frequency branch 1 and each parasitic branch correspond to a resonance point, so that the mobile terminal has good bandwidth expansion performance and can adapt to the multi-band application requirements of the terminal.
结合图1、图5所示,描述本发明的具体实施方式二:In conjunction with Fig. 1 and Fig. 5, a second specific embodiment of the present invention is described:
所述高频分支1、第一寄生分支3位于终端主板10上的净空面投影内,所述低频辐射分支2为单一走线,沿窄边边框的顶面延伸;所述第二寄生分支4为单一走线,沿窄边边框的顶面延伸。缝隙6-3内,在所述高频辐射分支1与第一寄生分支3之间连接有电容或容性元件11,用以增强耦合。The high-frequency branch 1 and the first parasitic branch 3 are located in the projection of the clear surface on the terminal main board 10, the low-frequency radiation branch 2 is a single line extending along the top surface of the narrow frame; the second parasitic branch 4 A single trace that runs along the top surface of the narrow bezel. In the gap 6-3, a capacitance or a capacitive element 11 is connected between the high-frequency radiation branch 1 and the first parasitic branch 3 to enhance coupling.
所述高频辐射分支1为主高频辐射体,对应产生第一谐振点。The high-frequency radiation branch 1 is a main high-frequency radiator, correspondingly generating a first resonance point.
所述第一寄生分支3为内寄生高频辐射体,其紧靠着所述第一分支1延伸并可根据实际调试需长度可,对应产生第二谐振点。The first parasitic branch 3 is an internal parasitic high-frequency radiator, which extends close to the first branch 1 and can be adjusted in length according to actual debugging requirements, correspondingly generating a second resonance point.
所述第二寄生分支4为外寄生高频辐射体,对应产生第三谐振点,所述第一寄生分支4与高频辐射分支1之间形成弱耦合。The second parasitic branch 4 is an external parasitic high-frequency radiator corresponding to a third resonance point, and a weak coupling is formed between the first parasitic branch 4 and the high-frequency radiation branch 1 .
结合图1、图6,描述本发明的具体实施方式三:In conjunction with Fig. 1 and Fig. 6, a third specific embodiment of the present invention is described:
所述高频分支1、第一寄生分支3位于终端主板10上的净空面投影内,所述低频辐射分支2为单一走线,沿窄边边框的顶面延伸;所述第二寄生分支4为单一走线,沿窄边边框的顶面延伸。缝隙6-3上方或下方设置有耦合片12,用以增强耦合。所述耦合片为金属片。The high-frequency branch 1 and the first parasitic branch 3 are located in the projection of the clear surface on the terminal main board 10, the low-frequency radiation branch 2 is a single line extending along the top surface of the narrow frame; the second parasitic branch 4 A single trace that runs along the top surface of the narrow bezel. A coupling sheet 12 is provided above or below the slot 6-3 to enhance coupling. The coupling sheet is a metal sheet.
所述高频辐射分支1为主高频辐射体,对应产生第一谐振点。The high-frequency radiation branch 1 is a main high-frequency radiator, correspondingly generating a first resonance point.
所述第一寄生分支3为内寄生高频辐射体,其紧靠着所述第一分支1延伸并可根据实际调试需长度可,对应产生第二谐振点。The first parasitic branch 3 is an internal parasitic high-frequency radiator, which extends close to the first branch 1 and can be adjusted in length according to actual debugging requirements, correspondingly generating a second resonance point.
所述第二寄生分支4为外寄生高频辐射体,对应产生第三谐振点,所述第一寄生分支4与高频辐射分支1之间形成弱耦合。The second parasitic branch 4 is an external parasitic high-frequency radiator corresponding to a third resonance point, and a weak coupling is formed between the first parasitic branch 4 and the high-frequency radiation branch 1 .
上述实施例二、三中描述的增设电容或容性元件或耦合片的方法,可进一步加强高频辐射分支1与第一寄生分支3之间的耦合强度,满足辐射需求。The method of adding a capacitor or a capacitive element or a coupling plate described in the above-mentioned embodiments 2 and 3 can further strengthen the coupling strength between the high-frequency radiation branch 1 and the first parasitic branch 3 to meet the radiation requirement.
需要说明的是,上述结构为结合具体内容而提供的若干实施方式,并不能认为本发明的具体实施只局限于此。凡与本发明结构等雷同、近似,或是在本发明构思前提下做出若干技术推演或替换,都应当视为本发明的保护范围。It should be noted that the above-mentioned structure provides several implementation modes in combination with specific content, and it should not be considered that the specific implementation of the present invention is limited thereto. Any similarity or similarity with the structure of the present invention, or some technical deduction or replacement under the premise of the present invention should be regarded as the protection scope of the present invention.
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