WO2017024670A1 - 一种天线系统以及通信电子设备 - Google Patents

一种天线系统以及通信电子设备 Download PDF

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Publication number
WO2017024670A1
WO2017024670A1 PCT/CN2015/091372 CN2015091372W WO2017024670A1 WO 2017024670 A1 WO2017024670 A1 WO 2017024670A1 CN 2015091372 W CN2015091372 W CN 2015091372W WO 2017024670 A1 WO2017024670 A1 WO 2017024670A1
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WIPO (PCT)
Prior art keywords
antenna
metal casing
region
high frequency
slit
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Ceased
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PCT/CN2015/091372
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English (en)
French (fr)
Inventor
姚德才
杨攀
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Publication of WO2017024670A1 publication Critical patent/WO2017024670A1/zh
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect

Definitions

  • the present invention relates to the field of communications technologies, and more particularly to an antenna system and communication electronic equipment.
  • the radio transmitter acts as a radio frequency signal source, and the output radio frequency signal is transmitted to the antenna through the feeder, and is radiated by the antenna device in the form of electromagnetic waves. After the electromagnetic wave arrives at the receiving location, it is carried by the antenna and transmitted to the radio receiver through the feeder. It can be seen that the antenna is an important radio component used by the communication electronics for transmitting and receiving electromagnetic waves, and there is no radio communication without the antenna.
  • the metal casing Due to the good touch quality and strong mechanical properties of the metal casing, more and more electronic devices tend to be packaged and protected by a metal casing. However, the metal casing has electromagnetic shielding properties, resulting in lower radiation efficiency of the antenna.
  • the present invention provides an antenna system and communication electronic equipment, which improves the radiation efficiency of the antenna.
  • the present invention provides the following technical solutions:
  • An antenna system for communication electronic equipment comprising: a metal casing and a WBG three-in-one antenna disposed in the metal casing, a main ground metal plate, and a radio frequency signal source;
  • the metal casing includes: a first region, a second region, and a slit disposed between the first region and the second region;
  • the WBG three-in-one antenna is disposed at a bottom of the metal casing and located in the first region; the WBG three-in-one antenna and the first sidewall have a first coupling feed gap, and the second side a second coupling feed gap between the walls; wherein the second sidewall is parallel to the slit and is in position
  • the first side wall and the second side wall are two side walls adjacent to the metal outer casing;
  • the main ground metal plate is disposed at a bottom of the metal casing, and in a direction perpendicular to a bottom of the metal casing, the main ground metal plate and the WBG three-in-one antenna are at a bottom of the metal casing
  • the projections do not overlap.
  • the WBG three-in-one antenna includes: a first feed point and a first antenna trace; the first antenna trace includes: a connected first coupling slot and a second coupling slot Forming a first high frequency branch of the first coupling slit; forming a second high frequency branch of the second coupling gap with the first high frequency branch;
  • the first feeding point is disposed between the first antenna trace and the bottom of the metal casing for connecting the radio frequency signal source;
  • the first high frequency branch surrounds the first feed point, and a first end of the first high frequency branch is connected to the first feed point, and a second end is connected to the second high frequency branch.
  • the slit comprises a first region slit opposite to the WBG three-in-one antenna; the first region slit has a length ranging from 15 mm to 30 mm, inclusive.
  • the method further includes: an LTE antenna disposed in the metal casing;
  • the LTE antenna is disposed at a bottom of the metal casing and located in the first region; in a direction perpendicular to a bottom of the metal casing, the LTE antenna and the main ground metal plate are in the metal casing The projections at the bottom do not overlap;
  • the LTE antenna includes: a second feed point and a second antenna trace;
  • the second antenna trace includes: a third high frequency branch and a fourth high frequency branch;
  • the second feed point is located at a junction of the third high frequency branch and the fourth high frequency branch; the second feed point is disposed at the bottom of the second antenna trace and the metal casing Between, used to connect the RF signal source;
  • the third high frequency branch extends parallel to the second sidewall
  • the fourth high frequency branch includes: a first segment extending parallel to the second sidewall and a second segment extending parallel to the third sidewall; the first segment is connected to the third high frequency branch at one end, The other end is connected to the second segment.
  • the slit comprises a second region slit opposite to the LTE antenna; the second region slit has a length ranging from 10 mm to 30 mm, inclusive.
  • the method further includes: a metal ring surrounding a side wall of the metal casing; and the metal ring has an opening filled with an insulating material.
  • the opening includes: a first opening opposite to one end of the slit and a second opening provided at the other end of the slit.
  • an insulating layer is disposed between the metal casing and the main ground metal plate;
  • the one end of the main ground metal plate opposite to the second side wall is electrically connected to the second side wall through a metal side connection point.
  • the present invention also provides a communication electronic device comprising: the antenna system of any of the above.
  • the communication electronic device is a mobile phone
  • the first area of the metal housing of the antenna system is used to set the handset of the handset.
  • the antenna system provided by the present invention includes: a metal casing and a WBG three-in-one antenna, a main ground metal plate, and a radio frequency signal source disposed in the metal casing;
  • the metal casing includes: a first area, a first a second region and a slit disposed between the first region and the second region;
  • the WBG three-in-one antenna is disposed at a bottom of the metal casing and located in the first region;
  • the first antenna has a first coupling feed gap between the first sidewall and a second coupling feed gap with the second sidewall; wherein the second sidewall is parallel to the slit and is located
  • the first region; the first sidewall and the second sidewall are two sidewalls adjacent to the metal casing;
  • the main ground metal plate is disposed at a bottom of the metal casing, and is perpendicular to In the direction of the bottom of the metal casing, the projection of the main ground metal plate and the WBG three-in-one antenna at
  • the WBG three-in-one antenna and the metal casing can be used as a radiator through the first coupling feed gap and the second coupling feed gap, thereby improving the Radiation efficiency of the antenna.
  • the WBG three-in-one antenna and the metal casing are radiated by the coupling feeding method, the signal is radiated with respect to the connection manner of the physical contact such as the shrapnel, and the signal transmission consistency and reliability are better.
  • the communication electronic device provided by the invention has the antenna system, and thus has better signal radiation efficiency, and the signal transmission consistency and reliability are better.
  • FIG. 1 is a schematic structural view of a conventional antenna system having a three-section metal casing
  • FIG. 2 is a schematic structural diagram of an antenna system according to an embodiment of the present application.
  • Figure 3 is a partial enlarged view of the first area of Figure 2;
  • Figure 4 is a partial enlarged view of the second area of Figure 2;
  • FIG. 5 is a schematic diagram of a coupling feeding principle of an antenna system according to an embodiment of the present application.
  • FIG. 6 is a waveform diagram of an S parameter (echo loss) corresponding to a WBG three-in-one antenna in an antenna system according to an embodiment of the present application;
  • FIG. 7 is a waveform diagram of an S parameter (echo loss) corresponding to an LTE antenna in an antenna system according to an embodiment of the present application;
  • FIG. 8 is a schematic structural diagram of a communication electronic device according to an embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of a conventional antenna system having a three-segment metal casing, which includes a metal casing 1, a PCB main board 2, an antenna, a feeding point 3, and a feeding point 4.
  • the metal casing 2 has two slits, and the metal casing 2 is divided into three sections.
  • the metal casing 2 includes a first metal casing 11, a second metal casing 12, and a third metal casing 13.
  • the antenna includes an antenna branch 5 disposed on a surface of the first metal outer casing 11 and an antenna branch 2 disposed on a surface of the third metal outer casing 13. Both the antenna branch 5 and the antenna branch 6 are connected to the RF signal source of the PCB main board 2 through the antenna connector.
  • a feed point 3 is disposed between the first metal outer casing 11 and the second metal outer casing 12, and a feed point 4 is disposed between the third metal outer casing 13 and the second metal outer casing 12. The signal band is adjusted by adjusting the position of the feed point 3 and the feed point 4.
  • both the antenna branch 5 and the antenna branch 6 are connected to the metal casing by a movable feed point.
  • Metal shrapnel is generally used as the feeding point.
  • the metal shrapnel has poor contact, resulting in poor signal radiation uniformity and reliability of the antenna system, and low radiation efficiency.
  • an embodiment of the present application provides an antenna system, with reference to FIG. 2 to FIG. 4.
  • 2 is a schematic structural view of an antenna system according to an embodiment of the present application
  • FIG. 3 is a partial enlarged view of the first region of FIG. 2
  • FIG. 4 is a partial enlarged view of the second region of FIG.
  • the antenna system includes a metal casing 21, a WBG three-in-one antenna 22 disposed in the metal casing 21, a main ground metal plate 23, and a radio frequency signal source 24.
  • the metal casing 21 includes a first region 211, a second region 212, and a slit 213 disposed between the first region 211 and the second region 212.
  • the WBG three-in-one antenna 22 is a BT (Bluetooth), WIFI, GPS three-in-one antenna.
  • the WBG three-in-one antenna 22 is disposed at the bottom of the metal casing 21 and located in the first region 211; and has a first coupling feed gap between the WBG three-in-one antenna 22 and the first sidewall B1.
  • B1 has a second coupling feed gap b2 between the second sidewall B2.
  • the second sidewall B2 is parallel to the slit 213 and located in the first region 211; the first sidewall B1 and the second sidewall B2 are adjacent to the metal shell 21 Two side walls.
  • each coupling feed gap refers to a distance between two objects.
  • the main ground metal plate 23 is disposed at a bottom of the metal casing 21, and in a direction perpendicular to a bottom of the metal casing, the main ground metal plate 23 and the WBG three-in-one antenna 22 are The projections at the bottom of the metal casing do not overlap.
  • the WBG three-in-one antenna 22 includes a first feeding point D1 and a first antenna line 221 .
  • the first antenna trace 221 includes: a first coupling slot f1 and a second coupling slot f2 that are connected to each other; a first high-frequency branch T1 that forms the first coupling slot f1; and the first high-frequency branch T1 A second high frequency branch T2 of the second coupling slit f2 is formed.
  • the first high frequency branch T1 forms the first coupling feed gap b1 with the first sidewall B1, and forms a second coupling feed gap b2 with the second sidewall B2.
  • the first feeding point D1 is disposed between the first antenna trace 221 and the bottom of the metal casing for connecting the RF signal source 24.
  • the RF signal source 24 is disposed on the surface of the main ground metal plate 23 facing the metal casing 31.
  • the first high frequency branch T1 surrounds the first feeding point D1, and the first end of the first high frequency branch T1 is connected to the first feeding point D1, and the second end is connected to the second high point Frequency branch T2.
  • the first feeding point D1 has a supporting structure for supporting the first antenna trace 221 such that the first antenna trace 221 and the bottom of the metal casing 21 have a coupling gap, so that the first The antenna trace 221 is coupled to the bottom of the metal casing 21 and coupled with the main ground metal plate 23 to increase the coupling area, thereby increasing the coupling strength, improving the radiation intensity of the radiator, and improving the radiation efficiency.
  • the slit 213 includes a first region slit k1 opposite to the WBG three-in-one antenna.
  • the first region slit k1 has a length ranging from 15 mm to 30 mm, inclusive.
  • the frequency range of the WBG three-in-one antenna can be adjusted by adjusting the length of the first region slit k1.
  • the WBG three-in-one antenna 22 is disposed in the clearance area 31 formed by the main ground metal plate 23, the first side wall B1, and the second side wall B2.
  • the clearance area 31 satisfies at least 10 mm*15 mm, that is, the length on the X-axis thereof is not less than 10 mm, and the length on the Y-axis is not less than 15 mm.
  • the WBG three-in-one antenna 22 has a distance d1 from the opposite portion of the main ground metal plate 23 on the X-axis, and a distance d2 from the opposite portion of the main ground metal plate 23 on the Y-axis.
  • the WBG three-in-one antenna 22 can well satisfy the required frequency bands of GPS, BT, and WIFI 2.4 GHz.
  • the WBG three-in-one antenna 22 has a feed point coupling gap between the first side wall B1, the second side wall B2, and the bottom portion, the antenna can be excited by adjusting the lengths of k1, b1, b2, d1, and d2.
  • the frequency range of the antenna allows the WBG three-in-one antenna 22 to have a wider band.
  • the antenna system further includes an LTE (Long Term Evolution) antenna 25 disposed in the metal casing 21.
  • the LTE antenna 25 is disposed at the bottom of the metal casing 21, and is located In the first region 211; in a direction perpendicular to the bottom of the metal casing 21, the projection of the LTE antenna 25 and the main ground metal plate 23 at the bottom of the metal casing 21 does not overlap.
  • LTE Long Term Evolution
  • the LTE antenna 25 has a third coupling feed gap b3 between the second sidewall B2 and a fourth coupling feed gap b4 between the third sidewall B3.
  • the third sidewall B3 is another adjacent sidewall of the second sidewall B2.
  • the LTE antenna 25 includes a second feed point D2 and a second antenna trace 251.
  • the second antenna trace 251 includes a third high frequency branch T3 and a fourth high frequency branch T4.
  • the second feed point D2 is located at a junction of the third high frequency branch T3 and the fourth high frequency branch T4.
  • the second feeding point D2 is disposed between the second antenna trace 251 and the bottom of the metal casing for connecting the RF signal source 24.
  • the second feed point D2 has a support structure for supporting the second antenna trace 251 such that the second antenna trace 251 has a coupling gap with the bottom of the metal casing 21, so that the second The antenna trace 251 is coupled to the bottom of the metal casing 21 and coupled with the main ground metal plate 23 to increase the coupling area, thereby increasing the coupling strength, improving the radiation intensity of the radiator, and improving the radiation efficiency.
  • the third high frequency branch T3 extends parallel to the second side wall B2.
  • the fourth high frequency branch T4 includes a first segment T41 extending parallel to the second sidewall B2 and a second segment T42 extending parallel to the third sidewall B3.
  • the first segment T41 has one end connected to the third high frequency branch T2 and the other end connected to the second segment T42.
  • the slit 213 further includes a second region slit k2 opposite to the LTE antenna 25.
  • the second region slit k2 has a length ranging from 10 mm to 30 mm, inclusive.
  • the frequency range of the LTE antenna can be adjusted by adjusting the length of the second region slit k2.
  • the LTE antenna 25 has a distance d3 from the main ground metal plate 23 on the X-axis and a distance d4 from the main ground metal plate 23 on the Y-axis.
  • the LTE antenna 25 can radiate a signal frequency range of 1.7 GHz to 2.3 GHz and 2.3 GHz to 2.8 GHz, including the endpoint value.
  • the third high frequency branch T3 can correspondingly realize a signal frequency range of 2.3 GHz to 2.8 GHz, and the frequency range can be adjusted by adjusting the length of the third high frequency branch T3.
  • the fourth high frequency branch T4 and k2 can correspondingly realize a signal frequency range of 1.7 GHz to 2.3 GHz, and the frequency range can be adjusted by adjusting the length of the fourth high frequency branch T4 and the length of k2.
  • the antenna 25 Since the LTE antenna 25 has a feed point coupling gap between the second side wall B2, the third side wall B3, and the bottom of the metal casing, the antenna can be adjusted by adjusting the lengths of b3, b4, d3, and d4 to adjust the antenna.
  • the frequency range makes the LTE antenna 25 have a wider band.
  • the bottom of the metal casing 21 is parallel to the XY plane.
  • the slit 213 is parallel to the X axis.
  • the first sidewall B1 and the third sidewall B3 are opposite sidewalls of the metal casing 21, and both are parallel to the Y-axis.
  • the second side wall B2 is parallel to the X axis, one end is connected to the first side wall B1, and the other end is connected to the third side wall B3.
  • the antenna system further includes: a metal ring surrounding a side wall of the metal casing; and the metal ring having an opening filled with an insulating material.
  • the opening comprises: a first opening opposite to one end of the slit and a second opening disposed at the other end of the slit.
  • An insulating layer is disposed between the metal casing 21 and the main ground metal plate 23.
  • an end of the main ground metal plate opposite to the second side wall B2 is electrically connected to the second side wall B2 through a metal side joint point 00.
  • the second side wall B2 is electrically connected to the main ground metal plate 23 through the metal side joint point 00, so that the radiator of the antenna includes the main ground metal plate 23, thereby further improving radiation efficiency.
  • the WBG three-in-one antenna/LTE antenna has a coupling feeding gap with two adjacent side walls of the metal casing, and has a coupling feeding gap with the bottom of the metal casing.
  • the coupling feeding principle of the two can be as shown in FIG. .
  • FIG. 5 is a schematic diagram of a coupling feeding principle of an antenna system according to an embodiment of the present application.
  • Face A and face B may be equivalent to two adjacent side walls of the metal outer casing, and face C may be equivalent to the bottom of the metal outer casing.
  • the WBG three-in-one antenna/LTE antenna has a coupling feed gap 51 between it and the surface A, and has a coupling feed gap 52 between the surface B and a coupling feed gap 53 between the surface C and the surface C.
  • the WBG three-in-one antenna/LTE antenna can generate strong coupling with the three adjacent metal faces through the corresponding coupling feed gap to achieve the purpose of coupling feeding, realize signal radiation and improve radiation efficiency.
  • both are located in the first area of the metal casing.
  • the communication system is prepared by using the antenna system, only the first area is required to be a non-handheld part, and signal attenuation caused by holding the corresponding area of the electronic antenna can be avoided, thereby avoiding hand loss and ensuring radiation efficiency of the signal.
  • the first region 211 and the second region 212 may be separate portions which are fixed by a fixing member.
  • it may be a one-piece structure in which a partial slit is formed by slitting, and at this time, the fixing member is not required to be fixed, and the unslitted portion between the first region 211 and the second region 212 at the partial slitting can achieve both of them.
  • the connection is fixed and the metal casing has good mechanical strength.
  • the range of each coupling feed gap is 0.5 mm-2 mm, including the end point value, and the coupling gap range is preferably set to 1 mm, and the coupling strength is better.
  • the antenna system realizes signal radiation by means of coupling feeding, which is convenient for designing antenna structure, position and frequency bandwidth, reducing manufacturing difficulty and improving reliability.
  • FIG. 6 is a waveform diagram of an S-parameter (echo loss) corresponding to a WBG three-in-one antenna in an antenna system according to an embodiment of the present invention. As shown in FIG. 6, the frequency coverage can meet the requirements and the performance is good.
  • the abscissa is the frequency
  • the unit is GHZ
  • the ordinate is the return loss
  • the unit is dB.
  • the coordinates of the four points are shown.
  • the coordinates of point 1 are (1.5700000, -16.753)
  • the coordinates of point 2 are (1.5800000, -13.939)
  • the coordinates of point 3 are (2.4000000, -5.7133)
  • the coordinates of point 4 are (2.5000000, -7.6476). It can be seen that in the corresponding bands of four points, the return loss is less than -5dB, which satisfies the return loss performance requirement of the antenna in the corresponding band.
  • FIG. 7 is a waveform diagram of an S parameter (echo loss) corresponding to an LTE antenna in an antenna system according to an embodiment of the present invention. As can be seen from FIG. 7, the frequency coverage can meet the requirements and the performance is good.
  • S parameter echo loss
  • the abscissa is the frequency
  • the unit is GHZ
  • the ordinate is the return loss
  • the unit is dB.
  • the coordinates of the six points are shown.
  • the coordinates of point 1 are (1.7100000, -8.3971)
  • the coordinates of point 2 are (2.1700000, -7.9451)
  • the coordinates of point 3 are (2.3000000, -7.6215)
  • the coordinates of point 4 are (2.4000000, -7.6195
  • the point 5 coordinates are (2.5000000, -9.1313)
  • the point 6 coordinates are (2.6900000, -6.5015). It can be seen that in the corresponding bands of the six points, the return loss is less than -5dB, which satisfies the return loss performance requirement of the antenna in the corresponding band.
  • the signal radiation current on the surface of the metal casing is mainly concentrated near the slit of the metal casing, which can make the signal loss (hand loss) and the use of the ear call when the terminal is held by the hand.
  • the loss of the signal (head loss) of the head is small, and the signal radiation efficiency is ensured.
  • the bottom of the metal casing may be rectangular or rounded rectangular. In the illustration of the embodiment of the present application, the bottom of the metal casing is illustrated as a rounded rectangle.
  • the WBG three-in-one antenna setting At a top corner of the first region of the metal casing, in order to make the WBG three-in-one antenna and the metal casing side sidewall have a larger coupling area, the coupling effect is stronger.
  • the LTE antenna is disposed at another corner of the first region of the metal casing so as to have a larger coupling area between the WBG three-in-one antenna and the side wall of the metal casing, so that the coupling effect is stronger.
  • the antenna system in the embodiment of the present application can improve the radiation efficiency of the antenna by using the metal casing as a radiator through the first coupling feed gap and the second coupling feed gap.
  • the signal is radiated with respect to the connection manner of the physical contact such as the shrapnel, and the signal transmission consistency and reliability are better.
  • FIG. 8 is a schematic structural diagram of a communication electronic device according to an embodiment of the present disclosure, and the communication electronic device 71 of FIG. 8 includes an antenna system.
  • the antenna system is the antenna system described in the above embodiments.
  • the metal casing of the antenna system is a metal backshell of the communication electronics.
  • the communication electronic device 71 shown in FIG. 8 is described by taking a mobile phone as an example.
  • the communication electronic device 71 is a mobile phone
  • the mobile phone adopts a metal back shell
  • the metal casing of the antenna system is a metal back shell of the mobile phone.
  • the first area of the metal casing of the antenna system is used to set the handset of the mobile phone, so that the WBG three-in-one antenna and the LTE antenna are located at the upper end of the mobile phone, and according to the communication habit of the mobile phone, the lower end of the user's hand-held mobile phone can be avoided.
  • the signal attenuation caused by the hand grip further ensures the radiation efficiency of the antenna.
  • the communication electronic device adopts the antenna system described in the above embodiments, and therefore has better signal radiation efficiency, and has better signal transmission consistency and reliability.

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Abstract

本申请公开了一种天线系统以及通信电子设备，天线系统包括：金属外壳以及设置在金属外壳内的WBG三合一天线、主地金属板以及射频信号源；金属外壳包括：第一区域、第二区域以及设置在第一区域以及第二区域之间的开缝；WBG三合一天线设置在金属外壳的底部，且位于第一区域；WBG三合一天线与第一侧壁之间具有第一耦合馈电间隙，与第二侧壁之间具有第二耦合馈电间隙；第二侧壁平行于所述开缝，且位于所述第一区域；第一侧壁与第二侧壁为金属外壳相邻的两侧壁；主地金属板设置在金属外壳的底部，且在垂直于所述金属外壳的底部的方向上，主地金属板与WBG三合一天线在底部的投影不交叠。本申请提高了辐射效率，信号传递的一致性与可靠性更好。

Description

一种天线系统以及通信电子设备 技术领域
本发明涉及通信技术领域，更具体的说，涉及一种天线系统以及通信电子设备。
背景技术
无线电发射机作为射频信号源，输出的射频信号，通过馈线输送到天线，由天线装置以电磁波形式辐射出去。电磁波到达接收地点后，由天线接下来，并通过馈线输送到无线电接收机。可见，天线是通信电子设备用于发射和接收电磁波的一个重要无线电元件，没有天线就没有无线电通信。
由于金属外壳具有较好的触摸质感以及较强的机械特性，越来越多的电子设备趋向于采用金属外壳进行封装保护。但是金属外壳具有电磁屏蔽特性，导致天线的辐射效率较低。
发明内容
为了解决上述问题，本发明提供了一种天线系统以及通信电子设备，提高了天线的辐射效率。
为了实现上述目的，本发明提供如下技术方案：
一种天线系统，用于通信电子设备，该天线系统包括：金属外壳以及设置在所述金属外壳内的WBG三合一天线、主地金属板以及射频信号源；
所述金属外壳包括：第一区域、第二区域以及设置在所述第一区域以及所述第二区域之间的开缝；
所述WBG三合一天线设置在所述金属外壳的底部，且位于所述第一区域；所述WBG三合一天线与第一侧壁之间具有第一耦合馈电间隙，与第二侧壁之间具有第二耦合馈电间隙；其中，所述第二侧壁平行于所述开缝，且位 于所述第一区域；所述第一侧壁与所述第二侧壁为所述金属外壳相邻的两侧壁；
所述主地金属板设置在所述金属外壳的底部，且在垂直于所述金属外壳的底部的方向上，所述主地金属板与所述WBG三合一天线在所述金属外壳的底部的投影不交叠。
优选的，在上述天线系统中，所述WBG三合一天线包括：第一馈电点以及第一天线走线；所述第一天线走线包括：连通的第一耦合缝隙以及第二耦合缝隙；形成所述第一耦合缝隙的第一高频分支；与所述第一高频分支之间形成所述第二耦合缝隙的第二高频分支；
所述第一馈电点设置在所述第一天线走线与所述金属外壳的底部之间，用于连接所述射频信号源；
所述第一高频分支包围所述第一馈电点，且所述第一高频分支的第一端连接所述第一馈电点，第二端连接所述第二高频分支。
优选的，在上述天线系统中，所述开缝包括与所述WBG三合一天线相对的第一区域开缝；所述第一区域开缝的长度范围为15mm-30mm，包括端点值。
优选的，在上述天线系统中，还包括：设置在所述金属外壳内的LTE天线；
所述LTE天线设置在所述金属外壳的底部，且位于所述第一区域；在垂直于所述金属外壳的底部的方向上，所述LTE天线与所述主地金属板在所述金属外壳的底部的投影不交叠；
所述LTE天线与所述第二侧壁之间具有第三耦合馈电间隙；与第三侧壁之间具有第四耦合馈电间隙；其中，所述第三侧壁为所述第二侧壁另一相邻的侧壁。
优选的，在上述天线系统中，所述LTE天线包括：第二馈电点以及第二天线走线；所述第二天线走线包括：第三高频分支以及第四高频分支；
所述第二馈电点位于所述第三高频分支以及所述第四高频分支的连接处；所述第二馈电点设置在所述第二天线走线与所述金属外壳的底部之间，用于连接所述射频信号源；
所述第三高频分支平行于所述第二侧壁延伸；
所述第四高频分支包括：平行所述第二侧壁延伸的第一段以及平行所述第三侧壁延伸的第二段；所述第一段一端连接所述第三高频分支，另一端连接所述第二段。
优选的，在上述天线系统中，所述开缝包括与所述LTE天线相对的第二区域开缝；所述第二区域开缝的长度范围为10mm-30mm，包括端点值。
优选的，在上述天线系统中，还包括：金属环，所述金属环包围所述金属外壳的四周侧壁；且所述金属环具有填充有绝缘物质的开口。
优选的，在上述天线系统中，所述开口包括：与所述开缝一端相对的第一开口以及与所述开缝另一端设置的第二开口。
优选的，在上述天线系统中，所述金属外壳与所述主地金属板之间设置有绝缘层；
其中，所述主地金属板与所述第二侧壁相对的一端通过金属侧衔接点与所述第二侧壁电连接。
本发明还提供了一种通信电子设备，该通信电子设备包括：上述任一项所述的天线系统。
优选的，在上述通信电子设备中，所述通信电子设备为手机；
所述天线系统的金属外壳的第一区域用于设置手机的听筒。
通过上述描述可知，本发明提供的天线系统包括：金属外壳以及设置在所述金属外壳内的WBG三合一天线、主地金属板以及射频信号源；所述金属外壳包括：第一区域、第二区域以及设置在所述第一区域以及所述第二区域之间的开缝；所述WBG三合一天线设置在所述金属外壳的底部，且位于所述第一区域；所述WBG三合一天线与第一侧壁之间具有第一耦合馈电间隙，与第二侧壁之间具有第二耦合馈电间隙；其中，所述第二侧壁平行于所述开缝，且位于所述第一区域；所述第一侧壁与所述第二侧壁为所述金属外壳相邻的两侧壁；所述主地金属板设置在所述金属外壳的底部，且在垂直于所述金属外壳的底部的方向上，所述主地金属板与所述WBG三合一天线在所述金属外壳的底部的投影不交叠。
本发明所述天线系统中，所述WBG三合一天线与金属外壳之间可以通过第一耦合馈电间隙以及第二耦合馈电间隙将金属外壳作为辐射体，提高所述 天线的辐射效率。同时，由于WBG三合一天线与金属外壳之间通过耦合馈电方式进行信号辐射，相对于弹片等物理接触的连接方式进行信号辐射，信号传递的一致性以及可靠性更好。本发明提供的通信电子设备具有所述天线系统，因此具有较好的信号辐射效率，且信号传递的一致性以及可靠性更好。
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简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为传统的具有三段式金属外壳的天线系统的结构示意图；
图2为本申请实施例提供的一种天线系统的结构示意图；
图3为图2的第一区域的局部放大图；
图4为图2的第二区域的局部放大图；
图5为本申请实施例所述天线系统的耦合馈电原理示意图；
图6为本申请实施例所述天线系统中WBG三合一天线对应的S参数(回波损)测试波形图；
图7为本申请实施例所述天线系统中LTE天线对应的S参数(回波损)测试波形图；
图8为本申请实施例提供的一种通信电子设备的结构示意图。
具体实施方式
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，所描述的实施例仅仅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做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。
参考图1，图1为传统的具有三段式金属外壳的天线系统的结构示意图，该天线系统包括：金属外壳1、PCB主板2、天线、馈电点3以及馈电点4。
所述金属外壳2具有两个开缝，将所述金属外壳2分为三段，所述金属外壳2包括：第一金属外壳11、第二金属外壳12以及第三金属外壳13。所述天线包括设置在所述第一金属外壳体11表面的天线分支一5以及设置在所述第三金属外壳体13表面的天线分支二6。天线分支一5以及天线分支二6均通过天线连接器与PCB主板2的射频信号源连接。第一金属外壳体11与第二金属外壳体12之间设置有馈电点3，第三金属外壳体13与第二金属外壳体12之间设置有馈电点4。通过调节馈电点3以及馈电点4的位置调节信号频段。
在传统的三段式金属外壳的天线系统中，天线分支一5以及天线分支二6均通过可移动的馈电点连接金属外壳。一般采用金属弹片作为馈电点。但是，金属弹片的接触性不好，导致天线系统的信号辐射一致性以及可靠性较差，同时辐射效率较低。
为了解决上述问题，本申请实施例提供了一种天线系统，参考图2-图4。图2为本申请实施例提供的一种天线系统的结构示意图，图3为图2的第一区域的局部放大图，图4为图2的第二区域的局部放大图。
该天线系统包括：金属外壳21以及设置在所述金属外壳21内的WBG三合一天线22、主地金属板23以及射频信号源24。其中，所述金属外壳21包括：第一区域211、第二区域212以及设置在所述第一区域211以及所述第二区域212之间的开缝213。所述WBG三合一天线22即为BT(蓝牙)、WIFI、GPS三合一天线。
所述WBG三合一天线22设置在所述金属外壳21的底部，且位于所述第一区域211；所述WBG三合一天线22与第一侧壁B1之间具有第一耦合馈电间隙b1，与第二侧壁之间B2具有第二耦合馈电间隙b2。其中，所述第二侧壁B2平行于所述开缝213，且位于所述第一区域211；所述第一侧壁B1与所述第二侧壁B2为所述金属外壳21相邻的两侧壁。本申请实施例中，各耦合馈电间隙均指对应两个对象之间的距离。
所述主地金属板23设置在所述金属外壳21的底部，且在垂直于所述金属外壳的底部的方向上，所述主地金属板23与所述WBG三合一天线22在所述金属外壳的底部的投影不交叠。
所述WBG三合一天线22包括：第一馈电点D1以及第一天线走线221。所述第一天线走线221包括：连通的第一耦合缝隙f1以及第二耦合缝隙f2；形成所述第一耦合缝隙f1的第一高频分支T1；与所述第一高频分支T1之间形成所述第二耦合缝隙f2的第二高频分支T2。第一高频分支T1与所述第一侧壁B1形成所述第一耦合馈电间隙b1，与所述第二侧壁B2形成第二耦合馈电间隙b2。
所述第一馈电点D1设置在所述第一天线走线221与所述金属外壳的底部之间，用于连接所述射频信号源24。射频信号源24设置在主地金属板23朝向金属外壳31的表面。所述第一高频分支T1包围所述第一馈电点D1，且所述第一高频分支T1的第一端连接所述第一馈电点D1，第二端连接所述第二高频分支T2。
所述第一馈电点D1具有支撑结构，用于支撑所述第一天线走线221，使得所述第一天线走线221与所述金属外壳21的底部之间具有耦合间隙，使得第一天线走线221与金属外壳21的底部耦合，并与主地金属板23耦合，增大耦合面积，进而增加耦合强度，提高辐射体的辐射强度，提高辐射效率。
所述开缝213包括与所述WBG三合一天线相对的第一区域开缝k1。所述第一区域开缝k1的长度范围为15mm-30mm，包括端点值。通过调整第一区域开缝k1的长度可以调整WBG三合一天线的频率范围。
所述WBG三合一天线22设置在所述主地金属板23、第一侧壁B1以及第二侧壁B2形成的净空区域31内。净空区域31至少满足10mm*15mm，即其方X轴上的长度不小于10mm，Y轴上的长度不小于15mm。
所述WBG三合一天线22在X轴上与所述主地金属板23相对部分的距离为d1，在Y轴上与所述主地金属板23相对部分的距离为d2。
采用本申请实施例所述天线系统，所述WBG三合一天线22可以很好满足GPS、BT以及WIFI2.4GHZ所需频段。
由于WBG三合一天线22与第一侧壁B1、第二侧壁B2以及底部之间均具有馈点耦合间隙，因此，可以通过调节k1、b1、b2、d1以及d2的长度激励天线，调节天线的频率范围，使得WBG三合一天线22具有较宽的波段。
所述天线系统还包括：设置在所述金属外壳21内的LTE(Long Term Evolution)天线25。所述LTE天线25设置在所述金属外壳21的底部，且位 于所述第一区域211；在垂直于所述金属外壳21的底部的方向上，所述LTE天线25与所述主地金属板23在所述金属外壳21的底部的投影不交叠。
所述LTE天线25与所述第二侧壁B2之间具有第三耦合馈电间隙b3；与第三侧壁B3之间具有第四耦合馈电间隙b4。其中，所述第三侧壁B3为所述第二侧壁B2另一相邻的侧壁。
所述LTE天线25包括：第二馈电点D2以及第二天线走线251；所述第二天线走线251包括：第三高频分支T3以及第四高频分支T4。
所述第二馈电点D2位于所述第三高频分支T3以及所述第四高频分支T4的连接处。所述第二馈电点D2设置在所述第二天线走线251与所述金属外壳的底部之间，用于连接所述射频信号源24。
所述第二馈电点D2具有支撑结构，用于支撑所述第二天线走线251，使得所述第二天线走线251与所述金属外壳21的底部之间具有耦合间隙，使得第二天线走线251与金属外壳21的底部耦合，并与主地金属板23耦合，增大耦合面积，进而增加耦合强度，提高辐射体的辐射强度，提高辐射效率。
所述第三高频分支T3平行于所述第二侧壁延伸B2。所述第四高频分支T4包括：平行所述第二侧壁B2延伸的第一段T41以及平行所述第三侧壁B3延伸的第二段T42。所述第一段T41一端连接所述第三高频分支T2，另一端连接所述第二段T42。
可选的，所述开缝213还包括与所述LTE天线25相对的第二区域开缝k2。所述第二区域开缝k2的长度范围为10mm-30mm，包括端点值。通过调整第二区域开缝k2的长度可以调整LTE天线的频率范围。
所述LTE天线25在X轴上与所述主地金属板23的距离为d3，在Y轴上与所述主地金属板23的距离为d4。
采用本申请实施例所述天线系统，所述LTE天线25可以辐射的信号频率范围是1.7GHZ-2.3GHZ以及2.3GHZ-2.8GHZ，包括端点值。其中，第三高频分支T3可对应实现的信号频率范围是2.3GHZ-2.8GHZ，通过调节第三高频分支T3的长度可以调节频率范围。第四高频分支T4及k2可对应实现的信号频率范围是1.7GHZ-2.3GHZ，通过调节第四高频分支T4的长度及k2长度可以调节频率范围。
由于LTE天线25与第二侧壁B2、第三侧壁B3以及金属外壳的底部之间均具有馈点耦合间隙，因此，可以通过调节b3、b4、d3以及d4的长度激励天线，调节天线的频率范围，使得LTE天线25具有较宽的波段。
在图2所示XY坐标系中，所述金属外壳21的底部平行于XY平面。所述开缝213平行于X轴。所述第一侧壁B1以及所述第三侧壁B3为所述金属外壳21相对的两个侧壁，且二者平行于Y轴。所述第二侧壁B2平行于X轴，一端连接所述第一侧壁B1，另一端连接所述第三侧壁B3。
为了增加机械强度以及辐射效率，所述天线系统还包括：金属环，所述金属环包围所述金属外壳的四周侧壁；且所述金属环具有填充有绝缘物质的开口。可选的，所述开口包括：与所述开缝一端相对的第一开口以及与所述开缝另一端设置的第二开口。
所述金属外壳21与所述主地金属板23之间设置有绝缘层。如图2所示，其中，所述主地金属板与所述第二侧壁B2相对的一端通过金属侧衔接点00与所述第二侧壁B2电连接。通过所述金属侧衔接点00将所述第二侧壁B2与所述主地金属板23电连接，可以使得所述天线的辐射体包括所述主地金属板23，进一步提高辐射效率。
WBG三合一天线/LTE天线均是与金属外壳的两个相邻侧壁具有耦合馈电间隙，且与金属外壳底部具有耦合馈电间隙，二者的耦合馈电原理可以如图5所示。
参考图5，图5为本申请实施例所述天线系统的耦合馈电原理示意图。面A以及面B可以等效为金属外壳的两个相邻侧壁，面C可以等效为金属外壳的底部。WBG三合一天线/LTE天线与面A之间具有耦合馈电间隙51，与面B之间具有耦合馈电间隙52，与面C之间具有耦合馈电间隙53。WBG三合一天线/LTE天线可以与近邻的三个金属面之间通过对应的耦合馈电间隙产生强耦合，达到耦合馈电的目的，实现信号的辐射，提高辐射效率。
本申请实施例所述天线系统中，当同时设置WBG三合一天线与LTE天线，二者均位于金属外壳的第一区域。在使用该天线系统制备通信电子设备时，只需要将第一区域作为非手持部分，可以避免由于手握电子天线对应区域导致的信号衰减，即可以避免手损，保证信号的辐射效率。
金属外壳21中，第一区域211与第二区域212可以为分离的两部分，通过固定件固定。或者，可以为一体成型的结构，通过开缝形成局部的开缝，此时无需固定件固定，局部开缝时第一区域211与第二区域212之间未开缝的部分可以实现二者的连接固定，同时金属外壳具有较好的机械强度。
可选的，在本申请实施例中，各耦合馈电间隙的范围是0.5mm-2mm，包括端点值，优选设置耦合间隙范围是1mm，此时耦合强度较好。
所述天线系统通过耦合馈电的方式实现信号的辐射，便于设计天线结构、位置以及频率带宽，降低了制作难度，提高了可靠性。
参考图6，图6为本申请实施例所述天线系统中WBG三合一天线对应的S参数(回波损)测试波形图，由图6可知，频率覆盖可以满足要求且性能较好。
图6中，横坐标为频率，单位GHZ，纵坐标为回波损，单位为dB。图6中，示出了四个点的坐标，点1坐标为(1.5700000，-16.753)，点2坐标为(1.5800000，-13.939)，点3坐标为(2.4000000，-5.7133)，点4坐标为(2.5000000，-7.6476)。可见在个四个点对应的波段内，回波损均是小于-5dB，满足天线在对应波段的回波损性能要求。
参考图7，图7为本申请实施例所述天线系统中LTE天线对应的S参数(回波损)测试波形图，由图7可知，频率覆盖可以满足要求且性能较好。
图7中，横坐标为频率，单位GHZ，纵坐标为回波损，单位谓dB。图7中，示出了六个点的坐标，点1坐标为(1.7100000，-8.3971)，点2坐标为(2.1700000，-7.9451)，点3坐标为(2.3000000，-7.6215)，点4坐标为(2.4000000，-7.6195)，点5坐标为(2.5000000，-9.1313)，点6坐标为(2.6900000，-6.5015)。可见在六个点对应的波段内，回波损均是小于-5dB，满足天线在对应波段的回波损性能要求。
通过对设定频段的辐射效果进行试验测试，金属外壳表面的信号辐射电流主要集中在金属外壳的开缝附近，可使得手握终端时人手对信号的损耗(手损)以及贴耳通话使用具有该天线系统的电子设备时人头对信号的损耗(头损)较小，保证了信号辐射效率。
所述金属外壳的底部可以为矩形或是圆角矩形。本申请实施例图示中，以所述金属外壳的底部为圆角矩形进行图示说明。所述WBG三合一天线设置 在所述金属外壳的第一区域的一个顶角处，以便于使得WBG三合一天线与金属外壳侧侧壁具有较大的耦合面积，使得耦合效果更强。所述LTE天线设置在所述金属外壳的第一区域的另一个顶角处，以便于使得WBG三合一天线与金属外壳侧侧壁具有较大的耦合面积，使得耦合效果更强。
通过上述描述可知，本申请实施例所述天线系统可以通过第一耦合馈电间隙以及第二耦合馈电间隙将金属外壳作为辐射体，提高所述天线的辐射效率。同时，由于WBG三合一天线与金属外壳之间通过耦合馈电方式进行信号辐射，相对于弹片等物理接触的连接方式进行信号辐射，信号传递的一致性以及可靠性更好。
本发明另一实施例还提供了一种通信电子设备，参考图8，图8为本申请实施例提供的一种通信电子设备的结构示意图，图8所述通信电子设备71包括天线系统。所述天线系统为上述实施例所述的天线系统。所述天线系统的金属外壳为所述通信电子设备的金属后壳。
图8所示通信电子设备71以手机为例进行说明。该通信电子设备71为手机时，手机采用金属后壳，所述天线系统的金属外壳为手机的金属后壳。
所述天线系统的金属外壳的第一区域用于设置手机的听筒，这样，使得WBG三合一天线、LTE天线均位于手机的上端，根据手机通信习惯，使用者手握手机的下端，可以避免用于手握导致的信号衰减，进一步保证了天线的辐射效率。
所述通信电子设备采用上述实施例所述天线系统，因此具有较好的信号辐射效率，且信号传递的一致性以及可靠性更好。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (11)

  1. 一种天线系统，用于通信电子设备，其特征在于，包括：金属外壳以及设置在所述金属外壳内的WBG三合一天线、主地金属板以及射频信号源；
    所述金属外壳包括：第一区域、第二区域以及设置在所述第一区域以及所述第二区域之间的开缝；
    所述WBG三合一天线设置在所述金属外壳的底部，且位于所述第一区域；所述WBG三合一天线与第一侧壁之间具有第一耦合馈电间隙，与第二侧壁之间具有第二耦合馈电间隙；其中，所述第二侧壁平行于所述开缝，且位于所述第一区域；所述第一侧壁与所述第二侧壁为所述金属外壳相邻的两侧壁；
    所述主地金属板设置在所述金属外壳的底部，且在垂直于所述金属外壳的底部的方向上，所述主地金属板与所述WBG三合一天线在所述金属外壳的底部的投影不交叠。
  2. 根据权利要求1所述的天线系统，其特征在于，所述WBG三合一天线包括：第一馈电点以及第一天线走线；所述第一天线走线包括：连通的第一耦合缝隙以及第二耦合缝隙；形成所述第一耦合缝隙的第一高频分支；与所述第一高频分支之间形成所述第二耦合缝隙的第二高频分支；
    所述第一馈电点设置在所述第一天线走线与所述金属外壳的底部之间，用于连接所述射频信号源；
    所述第一高频分支包围所述第一馈电点，且所述第一高频分支的第一端连接所述第一馈电点，第二端连接所述第二高频分支。
  3. 根据权利要求2所述的天线系统，其特征在于，所述开缝包括与所述WBG三合一天线相对的第一区域开缝；所述第一区域开缝的长度范围为15mm-30mm，包括端点值。
  4. 根据权利要求1所述的天线系统，其特征在于，还包括：设置在所述金属外壳内的LTE天线；
    所述LTE天线设置在所述金属外壳的底部，且位于所述第一区域；在垂直于所述金属外壳的底部的方向上，所述LTE天线与所述主地金属板在所述金属外壳的底部的投影不交叠；
    所述LTE天线与所述第二侧壁之间具有第三耦合馈电间隙；与第三侧壁之间具有第四耦合馈电间隙；其中，所述第三侧壁为所述第二侧壁另一相邻的侧壁。
  5. 根据权利要求4所述的天线系统，其特征在于，所述LTE天线包括：第二馈电点以及第二天线走线；所述第二天线走线包括：第三高频分支以及第四高频分支；
    所述第二馈电点位于所述第三高频分支以及所述第四高频分支的连接处；所述第二馈电点设置在所述第二天线走线与所述金属外壳的底部之间，用于连接所述射频信号源；
    所述第三高频分支平行于所述第二侧壁延伸；
    所述第四高频分支包括：平行所述第二侧壁延伸的第一段以及平行所述第三侧壁延伸的第二段；所述第一段一端连接所述第三高频分支，另一端连接所述第二段。
  6. 根据权利要求5所述的天线系统，其特征在于，所述开缝包括与所述LTE天线相对的第二区域开缝；所述第二区域开缝的长度范围为10mm-30mm，包括端点值。
  7. 根据权利要求1所述的天线系统，其特征在于，还包括：金属环，所述金属环包围所述金属外壳的四周侧壁；且所述金属环具有填充有绝缘物质的开口。
  8. 根据权利要求7所述的天线系统，其特征在于，所述开口包括：与所述开缝一端相对的第一开口以及与所述开缝另一端设置的第二开口。
  9. 根据权利要求1-8任一项所述的天线系统，其特征在于，所述金属外壳与所述主地金属板之间设置有绝缘层；
    其中，所述主地金属板与所述第二侧壁相对的一端通过金属侧衔接点与所述第二侧壁电连接。
  10. 一种通信电子设备，其特征在于，包括：如权利要求1-6任一项所述的天线系统。
  11. 根据权利要求10所述的通信电子设备，其特征在于，所述通信电子设备为手机；
    所述天线系统的金属外壳的第一区域用于设置手机的听筒。
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