WO2014106465A1 - 印刷电路板天线和印刷电路板 - Google Patents

印刷电路板天线和印刷电路板 Download PDF

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Publication number
WO2014106465A1
WO2014106465A1 PCT/CN2014/070043 CN2014070043W WO2014106465A1 WO 2014106465 A1 WO2014106465 A1 WO 2014106465A1 CN 2014070043 W CN2014070043 W CN 2014070043W WO 2014106465 A1 WO2014106465 A1 WO 2014106465A1
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WIPO (PCT)
Prior art keywords
branch
circuit board
printed circuit
gap
feed
Prior art date
Application number
PCT/CN2014/070043
Other languages
English (en)
French (fr)
Inventor
李正浩
兰尧
姜林涛
戚捷
张毅
姚云迪
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2015521974A priority Critical patent/JP5967506B2/ja
Priority to EP14735349.4A priority patent/EP2851997A4/en
Publication of WO2014106465A1 publication Critical patent/WO2014106465A1/zh
Priority to US14/573,152 priority patent/US9825366B2/en

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant antennas
    • H01Q9/0407Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/48Earthing means; Earth screens; Counterpoises
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30Arrangements for providing operation on different wavebands
    • H01Q5/307Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/321Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30Arrangements for providing operation on different wavebands
    • H01Q5/378Combination of fed elements with parasitic elements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant antennas
    • H01Q9/30Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42Resonant 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

Definitions

  • Embodiments of the present invention relate to wireless communication technologies, and more particularly to a printed circuit board antenna and a printed circuit board.
  • FIG. 1 is a schematic diagram of a prior art PCB antenna structure including a feed portion 11 and a low frequency coupling radiator 12.
  • the low frequency coupling radiator 12 replaces the matching circuit to realize the expansion of the low frequency, and is in contact with the PCB board 10 through the grounding point 120.
  • the feeding portion 11 includes a feeding point 110 through which the feeding point 110 and the PCB board 10 are The RF circuit is electrically connected.
  • Embodiments of the present invention provide a printed circuit board antenna and a printed circuit board to solve the problem of low efficiency when the high frequency bandwidth is wide, so as to meet the requirements of the product in the efficiency of satisfying the entire bandwidth.
  • an embodiment of the present invention provides a printed circuit board antenna, including: a feeding portion having at least one first branch;
  • a coupling interdigitating portion having at least one second branch, a gap formed between the first branch and the second branch;
  • a grounding portion a gap is formed between the grounding portion and the feeding portion, a gap is formed between the grounding portion and the coupling interdigitating portion, and the grounding portion is provided with an opening, and a feeding point of the feeding portion Extending from the opening.
  • the feeding portion includes a first straight segment type and the first branch, and the first branch extends parallel from a side of the first straight segment type
  • the coupling interdigitating portion includes a second straight segment type and the second branch, the second branch extending parallel from a side of the second straight segment type, the second branch and the second branch A branch is set relative to each other.
  • the first branch and the second branch are equal or unequal in length, the first branch and the first The gap distance between the two branches is equal or unequal, the gap between the ground portion and the feed portion is equal or unequal, and the gap between the ground portion and the coupling portion is equal or not equal.
  • the ground portion is a ring having the opening, and is disposed around The feed portion and the outer side of the coupling intersection portion.
  • the ground portion is further provided with a grounding point.
  • an embodiment of the present invention provides a printed circuit board including the printed circuit board antenna provided by the above embodiment of the present invention.
  • the printed circuit board is provided with a microstrip feed line, and the microstrip feed line is electrically connected to the feed point.
  • the impedance characteristic of the microstrip feed line may be 50 ohms.
  • an embodiment of the present invention provides a printed circuit board antenna, including a power feeding portion, a coupling interdigitating portion, and a grounding portion, wherein the feeding portion includes a first straight line segment type, a feeding point, and at least a portion a branch, the first branch protrudes from a side of the first straight line segment type, the feed point is located on a side opposite to the first branch of the straight line segment type; a straight line segment type and at least a second branch, the second branch extending from a side of the second straight line segment type, the first branch intersecting the second branch, and the first branch and the a gap between the second branches; the ground portion is an annular shape having an opening, the ground portion enclosing the feeding portion and the coupling interdigitating portion, the ground portion and the feeding portion A gap is formed between the ground portion and the coupling interdigitating portion, and the feeding point protrudes from the opening, and the outer portion of the ground portion has a grounding point with the PCB board contact portion.
  • the lengths of the first branch and the second branch are equal or unequal, and the gap between the first branch and the second branch is equal or not Equally, the gap between the ground portion and the feeding portion is equal or unequal, and the gap between the ground portion and the coupling interdigitating portion is equal or unequal.
  • the printed circuit board antenna enhances the coupling radiation by increasing the interdigitated structure, and achieves the efficiency in the entire bandwidth range to meet the product requirements, and solves the problem of low efficiency when the high frequency bandwidth is wide.
  • FIG. 1 is a schematic structural view of a PCB antenna in the prior art
  • FIG. 2 is a schematic structural view of a printed circuit board antenna according to Embodiment 1 of the present invention
  • 3A-31 are schematic diagrams showing the structure of a printed circuit board antenna according to another embodiment of the present invention.
  • FIG. 4 is a view showing an example of frequency band characteristics of a printed circuit board antenna according to Embodiment 1 of the present invention.
  • Figure 5 is a graph showing the performance of a printed circuit board antenna according to Embodiment 1 of the present invention.
  • Embodiment 2 is a schematic structural diagram of a printed circuit board antenna according to Embodiment 1 of the present invention.
  • This embodiment is applicable to an antenna device, which improves the efficiency, especially the low frequency efficiency, and does not need to be matched, in the base device of the small-sized printed antenna.
  • the long-term evolution (Long Term Evolution, hereinafter referred to as LTE) full-frequency coverage can be achieved; at the same time, the high-frequency smith circle diagram is more convergent, and the high-band efficiency improvement is more obvious.
  • the printed circuit board antenna described with reference to the figure includes a feed portion 21, a coupling interdigitating portion 22, and a ground portion 23.
  • the feeding portion 21 has at least one first branch 211; the coupling interdigitating portion 22 has at least one second branch 221, and a gap is formed between the first branch 211 and the second branch 221; the grounding portion 23, A gap is formed between the grounding portion 23 and the feeding portion 21, a gap is formed between the grounding portion 23 and the coupling interdigitating portion 22, and the grounding portion 23 is provided with an opening, and the feeding portion 21 is fed. Electrical point 212 extends from the opening.
  • the printed circuit board antenna of the embodiment of the present invention can enhance the coupling radiation by increasing the interdigitated structure, achieving the efficiency in the entire bandwidth range to meet the product requirements, and solving the problem of low efficiency when the high frequency bandwidth is wide.
  • the feed point 212 is connected to a radio frequency circuit (not shown).
  • the feed point 212 is arranged to extend from the opening to provide a high frequency portion of the entire radiation bandwidth of the antenna.
  • the printed circuit board antenna can be used as a high frequency antenna.
  • the feeding portion 21 includes a straight section type 213 and the first branch 211, and each of the first branches 211 protrudes from one side of the straight section type 213 (
  • the first branch 211 protrudes in parallel from one side of the straight line segment 213;
  • the coupling interdigitating portion 22 includes a straight segment type 222 and the second branch 221, and each of the second branches 221 is from a straight line One side of the segment type 222 protrudes (for example, the second branch 221 protrudes in parallel from one side of the straight segment type 222), and the second branch 221 is disposed opposite to the first branch 211.
  • the intersection in the embodiment of the present invention may be as long as one of the first branches 211 and one of the second branches 221 intersect. And the number of each of the first branch 211 and each of the second branches 221 can be set correspondingly as needed. As shown in Figures 3A-3C, the antenna bandwidth and resonance point are tuned, and the width and depth of the intersection can also be set as desired, as shown in Figures 3D-3F, to tune the coupling strength.
  • the cross-layout structure enables the printed circuit board antenna to meet the high integration requirements of the antenna design in a small size, and can enhance coupled radiation to improve high frequency efficiency.
  • the gap distance between the intersecting portions 22 can be designed to be equal or unequal according to actual needs, as shown in FIG. 3G-31.
  • the grounding portion 23 is an annular shape having the opening, and is disposed outside the feeding portion 21 and the coupling interdigitating portion 22.
  • the surrounding form of the grounding portion of other embodiments of the present invention is not limited to
  • the outer side of the ground portion 23 is also provided with a grounding point 231 which is in contact with the copper of the PCB board.
  • the embodiment of the present invention further provides a printed circuit board including a printed circuit board antenna.
  • the printed circuit board antenna includes a feeding portion 21, a coupling interdigitating portion 22, and a grounding portion 23.
  • the feeding portion 21 has at least one first branch 211;
  • the coupling interdigitating portion 22 has at least one second branch 221, and a gap is formed between the first branch 211 and the second branch 221;
  • the grounding portion 23 A gap is formed between the grounding portion 23 and the feeding portion 21, a gap is formed between the grounding portion 23 and the coupling interdigitating portion 22, and the grounding portion 23 is provided with an opening, and the feeding portion 21 is fed.
  • Electrical point 212 extends from the opening.
  • the printed circuit board antenna of the embodiment of the present invention can enhance the coupling radiation by increasing the interdigitated structure, achieving the efficiency in the entire bandwidth range to meet the product requirements, and solving the problem of low efficiency when the high frequency bandwidth is wide.
  • the feeding portion 21 includes a straight section type 213 and the first branch 211, and each of the first branches 211 protrudes from a side of the straight section type 213 (for example, the first branch 211 is from a straight section One side of the pattern 213 protrudes in parallel;
  • the coupling interdigitating portion 22 includes a straight section type 222 and the second branch 221, and each of the second branches 221 protrudes from one side of the straight section type 222 (for example, The second branch 221 extends in parallel from one side of the straight section type 222, and the second branch 221 is disposed opposite to the first branch 211.
  • the intersection in the embodiment of the present invention may be as long as one of the first branches 211 and one of the second branches 221 intersect. And the number of each of the first branch 211 and each of the second branches 221 can be set correspondingly as needed. As shown in Figures 3A-3C, the antenna bandwidth and resonance point are tuned, and the width and depth of the intersection can also be set as desired, as shown in Figures 3D-3F, to tune the coupling strength.
  • the cross-layout structure enables the printed circuit board antenna to meet the high integration requirements of the antenna design in a small size, and can enhance coupled radiation to improve high frequency efficiency.
  • the gap distance between the intersecting portions 22 can be designed to be equal or unequal according to actual needs, as shown in FIG. 3G-31.
  • the grounding portion 23 is a ring having the opening, and is disposed around the feeding portion 21 And the outer side of the coupling portion 22, but the surrounding form of the ground portion of the other embodiments of the present invention is not limited to the outer side of the ground portion 23, and is provided with a grounding point 231, which is in contact with the copper of the PCB board. .
  • the printed circuit board may be configured with a microstrip feed line, and the microstrip feed line is electrically connected to the feed point.
  • the impedance characteristic of the microstrip feed line is 50 ohms.
  • FIG. 4 is a diagram showing an example of frequency band characteristics of a printed circuit board antenna according to Embodiment 1 of the present invention, and the graph as a result of a reflection coefficient S11 test result shows a frequency band characteristic of a printed circuit board antenna according to an embodiment of the present invention, which relates to FIG. The structure shown.
  • the curve in Fig. 4 shows the relationship between the reflection coefficient and the operating frequency when the printed circuit board antenna is fed, wherein the impedance characteristic of the microstrip feed line electrically connected to the feed point may be 50 ohms.
  • the curve covers a frequency range of 600 MHz to 3 GHz.
  • two frequency bands of LTE (Long Term Evolution) products are included in the range of 791 to 960 MHz and 1710 to 2690 MHz, and the reflection coefficients thereof are all in the figure.
  • -5dB where OdB represents the condition of total reflection.
  • the antenna performance is acceptable below -5dB, and the lower the value of the reflection coefficient, the better the performance, such as the point 1 coordinate value on the curve (791MHz, - 5.339dB), point 3 coordinate value (960MHz, -ll.OWdB), point 4 coordinate value (1710MHz, -6.461dB), point 9 coordinate value (2690MHz, -6.922dB).
  • the printed PCB antenna structure of the prior art shown in FIG. 1 and the printed circuit board antenna of the present invention are respectively arranged by using the same single board, and the impedance characteristic of the microstrip feed line on the single board is 50 ohms, and the difference in contrast efficiency As shown in Figure 5.
  • the curve 51 shows the fluctuation of the efficiency of the grounding portion in the antenna structure of the printed circuit board of the present invention
  • the curve 52 shows the fluctuation of the efficiency of the coupled interdigital portion in the antenna structure of the printed circuit board of the present invention.
  • the efficiency of the printed circuit board antenna of the present invention in the low frequency band and the frequency band around 2600 MHz is superior to the printed PCB antenna in the prior art, wherein the curve 51 has at least 5% gain compared with the prior art antenna.
  • the curve 52 also has a gain of at least 4% compared to the prior art antenna, which indicates that the printed circuit board antenna of the present invention plays an important role in improving the antenna performance and improving the wireless transceiver capability of the whole machine.
  • Embodiments of the present invention also provide a printed circuit board antenna, including a feeding portion and a coupling interdigitation a portion and a ground portion, wherein the feed portion includes a first straight segment type, a feed point, and at least a first branch, the first branch extending from a side of the first straight segment type, the feed An electric point is located on an opposite side of the straight segment type from the first branch;
  • the coupling interdigitating portion includes a second straight segment type and at least a second branch, and the second branch is from the second straight segment type Sidely extending, the first branch intersects with the second branch, and a gap is formed between the first branch and the second branch;
  • the ground portion is an annular shape having an opening, and the ground portion is surrounded a feeding portion and the coupling interdigitating portion, a gap is formed between the grounding portion and the feeding portion, and a gap is formed between the ground portion and the coupling interdigitating portion, and the feeding point Extending from the opening, the outer portion of the ground portion has
  • the printed circuit board antenna comprises a feeding portion, a coupling interdigitating portion and a grounding portion, and the feeding portion and the coupling interdigitating portion are arranged in an interdigitated manner, so that the antenna portion is raised on the basis of the small-sized printed antenna.
  • Efficiency especially low-frequency efficiency, and LTE full-frequency coverage without matching; at the same time, the high-frequency smith chart is more convergent, and the high-band efficiency is more obvious.
  • the ring or ring shape mentioned in the above embodiments may be a rectangular ring shape or a rectangular ring shape, and may also be other ring shapes or ring shapes, which is not limited by the embodiment of the present invention.

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Abstract

本发明实施例提供一种印刷电路板天线和印刷电路板。本发明印刷电路板天线,包括:馈电部分,具有至少一个第一分支;耦合交指部分,具有至少一个第二分支,所述第一分支和第二分支之间形成缝隙;接地部分,所述接地部分与所述馈电部分之间形成缝隙,所述接地部分与耦合交指部分之间形成缝隙,且所述接地部分设有一开口,所述馈电部分的馈电点从所述开口伸出。本发明实施例解决了天线高频带宽较宽时的效率较低问题,实现了整个带宽范围内效率都满足产品要求。

Description

印刷电路板天线和印刷电路板 本申请要求于 2013 年 1 月 6 日提交中国专利局, 申请号为 201310003161.1、 发明名称为 "印刷电路板天线和印刷电路板" 的中国专利申 请, 其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及无线通信技术, 尤其涉及一种印刷电路板天线和印刷 电路板。
背景技术
随着移动通信技术的迅猛发展, 终端产品的功能越来越多样而复杂, 对 终端天线的要求也越来越苛刻和严格。 终端产品的集成度也越来越高, 2G、 3G等几乎需要在同一款产品里面同时存在, 这就要求天线要覆盖到整个所需 要的频段。
目前常规的印刷电路板 ( Printed circuit board, 以下简称 PCB )天线是形 成在 PCB上的导电图案,其通过增加匹配电路实现高频和低频的双谐振。如图 1所示的为一种现有技术中的 PCB天线结构示意图, 该 PCB天线结构包括馈电 部分 11和低频耦合辐射体 12。 其中所述低频耦合辐射体 12代替匹配电路实现 低频的拓展,通过接地点 120与 PCB板 10地接触;馈电部分 11包含一馈电点 110, 通过所述馈电点 110与 PCB板 10上射频电路电连接。
上述 PCB天线结构虽然解决了低频需要通过匹配电路来实现以及低频带 宽较窄的问题, 但当高频带宽较宽时, 对效率的提升仍存在一定的困难。 发明内容
本发明实施例提供一种印刷电路板天线和印刷电路板, 以解决高频带宽 较宽时的效率较低问题, 以实现满足整个带宽范围内效率都满足产品要求。
第一方面, 本发明实施例提供一种印刷电路板天线, 包括: 馈电部分, 具有至少一个第一分支;
耦合交指部分, 具有至少一个第二分支, 所述第一分支和第二分支的之 间形成缝隙;
接地部分, 所述接地部分与所述馈电部分之间形成缝隙, 所述接地部分 与耦合交指部分之间形成缝隙, 且所述接地部分设有一开口, 所述馈电部分 的馈电点从所述开口伸出。
在第一方面的第一种可能的实现方式中, 所述馈电部分包括第一直线段 型和所述第一分支, 所述第一分支从所述第一直线段型的一侧平行伸出; 所述耦合交指部分包括第二直线段型和所述第二分支, 所述第二分支从 所述第二直线段型的一侧平行伸出, 所述第二分支与所述第一分支相对交叉 设置。
根据第一方面的第一种可能的实现方式, 在第二种可能的实现方式中, 所述第一分支和所述第二分支的长度相等或不相等, 所述第一分支和所述第 二分支之间的缝隙距离相等或不相等, 所述接地部分与所述馈电部分之间的 缝隙距离相等或不相等, 所述接地部分与所述耦合交指部分之间的缝隙距离 相等或不相等。
根据第一方面、 第一方面的第一种至第二种可能的实现方式的任意一 种, 在第三种可能的实现方式中, 所述接地部分为具有所述开口的环形, 围 设在所述馈电部分和所述耦合交指部分的外侧。
根据第一方面的第三种可能的实现方式, 在第四种可能的实现方式中, 所述接地部分的外侧还设置有接地点。
第二方面, 本发明实施例提供一种印刷电路板, 所述印刷电路板包括本 发明上述实施例所提供的印刷电路板天线。
在第二方面的第一种可能的实现方式中, 所述印刷电路板上配置有微带 馈线, 所述微带馈线与所述馈电点电连接。
根据第二方面的第一种可能的实现方式, 在第二种可能的实现方式中, 所述微带馈线的阻抗特性可以为 50欧姆。
第三方面, 本发明实施例提供了一种印刷电路板天线, 包括馈电部分、 耦合交指部分和接地部分, 其中, 所述馈电部分包括第一直线段型、 馈电点 和至少第一分支, 所述第一分支从所述第一直线段型的一侧伸出, 所述馈电 点位于所述直线段型与所述第一分支相对侧; 所述耦合交指部分包括第二直 线段型和至少第二分支, 所述第二分支从所述第二直线段型的一侧伸出, 所 述第一分支与所述第二分支交叉, 并且所述第一分支与所述第二分支之间有 缝隙; 所述接地部分为具有开口的环状, 所述接地部分围设所述馈电部分和 所述耦合交指部分, 所述接地部分与所述馈电部分之间形成有缝隙, 所述接 地部分与耦合交指部分之间形成有缝隙, 所述馈电点从所述开口伸出, 所述 接地部分外侧与 PCB板接触部有接地点。
在第三方面的第一种可能实现方式中, 所述第一分支和所述第二分支的 长度相等或不相等, 所述第一分支和所述第二分支之间的缝隙距离相等或不 相等, 所述接地部分与所述馈电部分之间的缝隙距离相等或不相等, 所述接 地部分与所述耦合交指部分之间的缝隙距离相等或不相等。
本发明实施例印刷电路板天线, 通过增加交指结构, 加强耦合辐射, 实 现整个带宽范围内效率都满足产品要求, 解决高频带宽较宽时的效率较低问 题。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实 施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下 面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在 不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为一种现有技术中的 PCB天线结构示意图;
图 2为本发明实施例一的印刷电路板天线的结构示意图; 图 3A-图 31为本发明其它实施例的印刷电路板天线的结构示意图;
图 4为本发明实施例一的印刷电路板天线的频带特性示例图;
图 5为本发明实施例一的印刷电路板天线的性能图。
具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发 明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于 本发明中的实施例, 本领域普通技术人员在没有作出创造性劳动前提下所获 得的所有其他实施例, 都属于本发明保护的范围。
图 2为本发明实施例一的印刷电路板天线的结构示意图, 本实施例适用 于天线装置, 使其在小尺寸印制天线的基石出上, 提升效率, 尤其提高低频效 率, 并且无需匹配就可实现长期演进 (Long Term Evolution, 以下简称 LTE)全 频覆盖; 同时, 高频的 smith圓图较为收敛, 高频段效率提升较为明显。 参照 图 所述印刷电路板天线包括馈电部分 21、耦合交指部分 22和接地部分 23。
其中, 馈电部分 21 , 具有至少一个第一分支 211 ; 耦合交指部分 22, 具 有至少一个第二分支 221, 所述第一分支 211和第二分支 221之间形成缝隙; 接地部分 23 , 所述接地部分 23与所述馈电部分 21之间形成缝隙, 所述接地 部分 23与耦合交指部分 22之间形成缝隙, 且所述接地部分 23设有一开口, 所述馈电部分 21的馈电点 212从所述开口伸出。
由上可以看出, 本发明实施例印刷电路板天线, 通过增加交指结构, 可 以加强耦合辐射, 实现整个带宽范围内效率都满足产品要求, 解决高频带宽 较宽时的效率较低问题。
其中, 所述馈电点 212与射频电路(图中未示出)连接。 所述馈电点 212 设置为从所述开口伸出, 这样可以提供天线整个辐射带宽的高频部分。 另外, 在没有所述耦合交指部分 22和接地部分 23的情况下, 印刷电路板天线可以 做高频天线使用。
在上述实施例技术方案的基础上, 优选的: 所述馈电部分 21包括直线段 型 213和所述第一分支 211, 各所述第一分支 211从直线段型 213的一侧伸出 (例如, 所述第一分支 211从直线段型 213的一侧平行伸出) ; 所述耦合交 指部分 22包括直线段型 222和所述第二分支 221 , 各所述第二分支 221从直 线段型 222的一侧伸出 (例如, 所述第二分支 221从直线段型 222的一侧平 行伸出) , 所述第二分支 221与所述第一分支 211相对交叉设置。
其中, 本发明实施例中的交叉可以是只要有其中一个所述第一分支 211 和其中一个第二分支 221交叉即可。 并且各所述第一分支 211和各所述第二 分支 221的数量可以根据需要设置相应的数量。 如图 3A-图 3C所示, 以便调 谐天线带宽和谐振点, 同时交叉部分的宽度和深度也可以根据需要设定, 如 图 3D-图 3F所示, 以便调谐耦合强弱。 该交叉布局结构使得所述印刷电路板 天线能够以较小的尺寸满足天线设计高集成度的要求, 并且能够加强耦合辐 射, 提升高频效率。
另外, 各所述第一分支 211的长度、 第二分支 221的长度、 第一分支 211 和第二分支 221之间的缝隙距离以及所述接地部分 23与所述馈电部分 21和 所述耦合交指部分 22之间的缝隙距离, 可以根据实际需要设计为相等或不相 等的模式, 如图 3G-图 31所示。
其中, 所述接地部分 23为具有所述开口的环形, 围设在所述馈电部分 21 和所述耦合交指部分 22的外侧, 但本发明其他实施例接地部分的环绕形式并 不限于 所述接地部分 23的外侧还设置有接地点 231,该接地点 231与 PCB 板的铺铜接触。
本发明实施例还提供一种印刷电路板, 所述印刷电路板包括印刷电路板 天线, 参照图 2, 所述印刷电路板天线包括馈电部分 21、 耦合交指部分 22和 接地部分 23。 其中, 馈电部分 21 , 具有至少一个第一分支 211 ; 耦合交指部分 22, 具 有至少一个第二分支 221, 所述第一分支 211和第二分支 221之间形成缝隙; 接地部分 23 , 所述接地部分 23与所述馈电部分 21之间形成缝隙, 所述接地 部分 23与耦合交指部分 22之间形成缝隙, 且所述接地部分 23设有一开口, 所述馈电部分 21的馈电点 212从所述开口伸出。
由上可以看出, 本发明实施例印刷电路板天线, 通过增加交指结构, 可 以加强耦合辐射, 实现整个带宽范围内效率都满足产品要求, 解决高频带宽 较宽时的效率较低问题。
其中: 所述馈电部分 21包括直线段型 213和所述第一分支 211 , 各所述 第一分支 211从直线段型 213的一侧伸出 (例如, 所述第一分支 211从直线 段型 213的一侧平行伸出 ); 所述耦合交指部分 22包括直线段型 222和所述 第二分支 221 , 各所述第二分支 221从直线段型 222的一侧伸出 (例如, 所述 第二分支 221从直线段型 222的一侧平行伸出) , 所述第二分支 221与所述 第一分支 211相对交叉设置。
其中, 本发明实施例中的交叉可以是只要有其中一个所述第一分支 211 和其中一个第二分支 221交叉即可。 并且各所述第一分支 211和各所述第二 分支 221的数量可以根据需要设置相应的数量。 如图 3A-图 3C所示, 以便调 谐天线带宽和谐振点, 同时交叉部分的宽度和深度也可以根据需要设定, 如 图 3D-图 3F所示, 以便调谐耦合强弱。 该交叉布局结构使得所述印刷电路板 天线能够以较小的尺寸满足天线设计高集成度的要求, 并且能够加强耦合辐 射, 提升高频效率。
另外, 各所述第一分支 211的长度、 第二分支 221的长度、 第一分支 211 和第二分支 221之间的缝隙距离以及所述接地部分 23与所述馈电部分 21和 所述耦合交指部分 22之间的缝隙距离, 可以根据实际需要设计为相等或不相 等的模式, 如图 3G-图 31所示。
其中, 所述接地部分 23为具有所述开口的环形, 围设在所述馈电部分 21 和所述耦合交指部分 22的外侧, 但本发明其他实施例接地部分的环绕形式并 不限于 所述接地部分 23的外侧还设置有接地点 231,该接地点 231与 PCB 板的铺铜接触。
其中, 进一步的或可选的, 所述印刷电路板上可以配置有微带馈线, 所 述微带馈线与所述馈电点电连接。 优选是微带馈线的阻抗特性为 50欧姆。
图 4为本发明实施例一的印刷电路板天线的频带特性示例图, 该图作为反 射系数 S11测试结果的曲线显示了根据本发明实施例的印刷电路板天线的频 带特性, 涉及图 2中所示出的结构。 图 4中曲线表示在所述印刷电路板天线被 馈电时所述反射系数与工作频率的关系, 其中, 与所述馈电点电连接的微带 馈线的阻抗特性可以为 50欧姆。
所述曲线覆盖频率范围为 600MHz〜3GHz,在整个覆盖范围内, LTE ( Long Term Evolution ) 产品的两个频段 791〜960MHz和 1710〜2690MHz都被包含在 内, 并且在该图中其反射系数均低于 -5dB, 其中 OdB代表全反射时的情况, 通 常来讲, 低于 -5dB时天线性能可接受, 反射系数的值越低则性能越好, 如曲 线上点 1坐标值(791MHz, -5.339dB )、 点 3坐标值( 960MHz, -ll.OWdB ), 点 4坐标值 ( 1710MHz, -6.461dB )、 点 9坐标值 ( 2690MHz, -6.922dB )。
采用同样的单板分别布置图 1所示的现有技术中的印制 PCB天线结构与本 发明印刷电路板天线, 且所述单板上微带馈线的阻抗特性为 50欧姆, 对比效 率的差异如图 5所示。 其中, 曲线 51显示了本发明印刷电路板天线结构中接地 部分效率的波动, 曲线 52显示了本发明印刷电路板天线结构中耦合交指部分 效率的波动。从实测情况上来看,本发明印刷电路板天线在低频以及 2600MHz 左右频段的效率,要优于现有技术中的印制 PCB天线,其中曲线 51较之现有技 术天线至少有 5%的增益, 曲线 52较之现有技术天线也至少有 4%的增益, 这说 明了本发明印刷电路板天线对于改善天线性能, 提升整机的无线收发能力有 着重要的作用。
本发明实施例还提供了一种印刷电路板天线, 包括馈电部分、 耦合交指 部分和接地部分, 其中, 所述馈电部分包括第一直线段型、 馈电点和至少第 一分支, 所述第一分支从所述第一直线段型的一侧伸出, 所述馈电点位于所 述直线段型与所述第一分支相对侧; 所述耦合交指部分包括第二直线段型和 至少第二分支, 所述第二分支从所述第二直线段型的一侧伸出, 所述第一分 支与所述第二分支交叉, 并且所述第一分支与所述第二分支之间有缝隙; 所 述接地部分为具有开口的环状, 所述接地部分围设所述馈电部分和所述耦合 交指部分, 所述接地部分与所述馈电部分之间形成有缝隙, 所述接地部分与 耦合交指部分之间形成有缝隙, 所述馈电点从所述开口伸出, 所述接地部分 外侧与 PCB板接触部有接地点。
可以看出, 该印刷电路板天线包括馈电部分、 耦合交指部分和接地部分, 馈电部分与耦合交指部分呈交指状布局结构, 使其在小尺寸印制天线的基础 上, 提升效率, 尤其提高低频效率, 并且无需匹配就可实现 LTE全频覆盖; 同时, 高频的 smith圓图较为收敛, 高频段效率提升较为明显。
需要说明的是, 上述实施例中提到的环形或环状, 可以为矩形环形或矩 形环状、 当然也可以为其他环形或环状, 本发明实施例对此并不限制。
最后应说明的是: 以上各实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述各实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分或者全部技术特征进行等同替换; 而这些修改或者替换, 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权利 要求 书
1、 一种印刷电路板天线, 其特征在于, 包括:
馈电部分, 具有至少一个第一分支;
耦合交指部分, 具有至少一个第二分支, 所述第一分支和第二分支之间形 成缝隙;
接地部分, 所述接地部分与所述馈电部分之间形成缝隙, 所述接地部分与 耦合交指部分之间形成缝隙, 且所述接地部分设有一开口, 所述馈电部分的馈 电点从所述开口伸出。
2、 根据权利要求 1所述的印刷电路板天线, 其特征在于:
所述馈电部分包括第一直线段型和所述第一分支, 所述第一分支从所述第 一直线段型的一侧平行伸出;
所述耦合交指部分包括第二直线段型和所述第二分支, 所述第二分支从所 述第二直线段型的一侧平行伸出, 所述第二分支与所述第一分支相对交叉设置。
3、 根据权利要求 2所述的印刷电路板天线, 其特征在于:
所述第一分支和所述第二分支的长度相等或不相等, 所述第一分支和所述 第二分支之间的缝隙距离相等或不相等, 所述接地部分与所述馈电部分之间的 缝隙距离相等或不相等, 所述接地部分与所述耦合交指部分之间的缝隙距离相 等或不相等。
4、 根据权利要求 1-3任一所述的印刷电路板天线, 其特征在于:
所述接地部分为具有所述开口的环形, 围设在所述馈电部分和所述耦合交 指部分的外侧。
5、 根据权利要求 4所述的印刷电路板天线, 其特征在于: 所述接地部分的 外侧还设置有接地点。
6、 一种印刷电路板, 其特征在于: 所述印刷电路板包括权利要求 1-5任一 所述的印刷电路板天线。
7、 根据权利要求 6所述的印刷电路板, 其特征在于: 所述印刷电路板上配 置有微带馈线, 所述微带馈线与所述馈电点电连接。
8、 根据权利要求 7所述的印刷电路板, 其特征在于: 所述微带馈线的阻抗 特性可以为 50欧姆。
9、 一种印刷电路板天线, 其特征在于, 包括馈电部分、 耦合交指部分和接 地部分, 其中, 所述馈电部分包括第一直线段型、 馈电点和至少第一分支, 所 述第一分支从所述第一直线段型的一侧伸出, 所述馈电点位于所述直线段型与 所述第一分支相对侧; 所述耦合交指部分包括第二直线段型和至少第二分支, 所述第二分支从所述第二直线段型的一侧伸出, 所述第一分支与所述第二分支 交叉, 并且所述第一分支与所述第二分支之间有缝隙; 所述接地部分为具有开 口的环状, 所述接地部分围设所述馈电部分和所述耦合交指部分, 所述接地部 分与所述馈电部分之间形成有缝隙, 所述接地部分与耦合交指部分之间形成有 缝隙, 所述馈电点从所述开口伸出, 所述接地部分外侧与 PCB板接触部有接地 点。
10、 根据权利要求 9所述的印刷电路板天线, 其特征在于:
所述第一分支和所述第二分支的长度相等或不相等, 所述第一分支和所述第 二分支之间的缝隙距离相等或不相等, 所述接地部分与所述馈电部分之间的缝隙 距离相等或不相等, 所述接地部分与所述耦合交指部分之间的缝隙距离相等或不 相等。
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US9825366B2 (en) 2017-11-21
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