WO2019042233A1 - 天线装置及线控蓝牙耳机 - Google Patents

天线装置及线控蓝牙耳机 Download PDF

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Publication number
WO2019042233A1
WO2019042233A1 PCT/CN2018/102335 CN2018102335W WO2019042233A1 WO 2019042233 A1 WO2019042233 A1 WO 2019042233A1 CN 2018102335 W CN2018102335 W CN 2018102335W WO 2019042233 A1 WO2019042233 A1 WO 2019042233A1
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Prior art keywords
transmission line
antenna device
metal shell
radiation signal
metal
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PCT/CN2018/102335
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English (en)
French (fr)
Inventor
孙劲
韩天天
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歌尔股份有限公司
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Publication of WO2019042233A1 publication Critical patent/WO2019042233A1/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
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/273—Adaptation for carrying or wearing by persons or animals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Definitions

  • the present invention relates to the field of antenna technologies, and more particularly to an antenna device and a wire-controlled Bluetooth headset.
  • the space for arranging the antennas is small.
  • the antenna clearance area is limited. Therefore, the performance of the antenna is limited.
  • metal-like housings Today, more and more electronic devices use metal-like housings.
  • the metal-like casing gives the user a stylish feel.
  • the metal shell can have a large adverse effect on the radiation performance of the antenna.
  • metal parts such as motors, microphones, etc. can also have a significant impact on the antenna. For example, there is a strong coupling between the antenna and the metal frame of the adjacent metal casing or metal piece, thereby confining the radiation of the antenna to the near field of the antenna without generating effective radiation. This can lead to further degradation of antenna performance.
  • Bluetooth devices are becoming more and more popular.
  • a Bluetooth headset can communicate with a source device such as a cell phone via a Bluetooth link.
  • the Bluetooth headset can include a remote control device that can communicate with the source device via the remote control device.
  • the Bluetooth headset can be either an in-ear earphone or a headset.
  • a Bluetooth headset in the form of an in-ear earbud may include a flexible or rigid transmission line for connecting two earplugs.
  • an antenna apparatus comprising: a transmission line and a metal case, wherein the transmission line is drawn from the metal case and coupled to the metal case, the metal case forms a cavity of a resonant cavity Resonating the radiation signal to be transmitted and radiating the radiation signal via the transmission line; or receiving a radiation signal transmitted by the external device via the transmission line, and resonating the received radiation signal to obtain the received radiation signal.
  • the transmission line includes at least one of an audio line, a control line, or a power line.
  • a feeding point and a feeding point are disposed in a cavity of the metal shell, the transmission line is electrically connected to the metal shell via a feeding point and a feeding point, and through the feeding point
  • the antenna resonance frequency of the antenna device is set at a feeding point.
  • the equivalent resonant length of the resonant cavity is set by the feed point and the feed point to be one quarter of the wavelength of the radiation signal.
  • the wavelength of the radiation signal is comparable to the size of at least one dimension of the cavity.
  • the transmission line is a headphone cord, and a wire control device in which the earphone is disposed in the metal casing.
  • the shape of the cavity comprises a column shape
  • the cavity has a metal cover at both ends
  • the metal cover has a wire hole
  • the transmission line passes through the wire hole Coupling with the metal shell.
  • a feeding point and a feeding point are disposed in a cavity of the metal shell, and at least one of a hard printed circuit board and a flexible circuit board is disposed in the metal shell, the hard printed circuit a board or a flexible circuit board connected to a feed point and a feed point of the metal case, the transmission line being connected to the hard printed circuit board or the flexible circuit board, and via the feed point and the feed point at the metal case and The radiation signals are fed between the transmission lines.
  • the frequency band of the radiation signal is a WiFi band or a Bluetooth band.
  • a wire-controlled Bluetooth headset comprising the antenna device according to any of the embodiments, wherein the transmission line is a headphone cord of the wire-controlled Bluetooth headset, and the metal A wire control device for the wire-controlled Bluetooth headset is disposed in the casing.
  • an antenna device having a simple structure can be provided.
  • FIG. 1 shows a schematic diagram of an antenna device in accordance with an embodiment of the present disclosure.
  • FIG. 2 shows a schematic diagram of an example of an antenna device in accordance with an embodiment of the present disclosure.
  • Fig. 3 is a cross-sectional perspective view showing an example of the antenna device shown in Fig. 2.
  • FIG. 1 shows a schematic diagram of an antenna device in accordance with an embodiment of the present disclosure.
  • the antenna device includes a transmission line and a metal case.
  • the transmission line is led out of the metal shell and coupled to the metal shell.
  • the metal shell forms a cavity of the resonant cavity 1 to act as a resonant cavity 1 for the radiated signal, resonating the radiated signal to be emitted and radiating the radiated signal via the transmission line.
  • the antenna device of the present disclosure can be used to transmit a radiation signal and can also be used to receive a radiation signal.
  • the metal shell receives the radiation signal transmitted by the external device via the transmission line, and resonates the received radiation signal to obtain the received radiation signal.
  • the transmission line can be electrically connected directly or indirectly to the metal shell through a feed point and/or a feed point.
  • the transmission line can also be coupled to the metal shell by electromagnetic coupling. Since this is not the focus of the present invention, the present invention is not limited thereto, and a detailed description thereof will be omitted herein.
  • the radiation signal may be converted into a signal transmitted in a transmission line in a metal shell.
  • the transmission line is an audio line, in which case the radiation signal is converted into an audio signal transmitted by the audio line within the metal casing.
  • the radiation signal can also be a signal generated within the metal shell.
  • the metal casing is a wire-controlled device, and the radiation signal is a control signal transmitted between the online control device and an electronic device such as a mobile phone.
  • the antenna device can function both as a transmit antenna and as a receive antenna.
  • the separation of the transmitted signal and the received signal is not of interest to the present invention and, therefore, is not described in detail herein.
  • a single electric dipole (single polarization) or a pair of electric dipoles (orthogonally polarized antennas) are typically formed to form the radiating elements of the antenna.
  • the radiating element is fed (radiation signal and/or ground signal) to radiate the radiation signal. Therefore, the design of the antenna device proposed herein is completely different from the prior art.
  • the metal shell 1 can serve as a resonant cavity for the radiation signal.
  • the radiation signal When the radiation signal is fed into the metal shell 1, the radiation signal resonates in the resonant cavity.
  • the transmission line is passed out of the metal shell 1, and therefore, the resonant radiation signal can be coupled to the transmission line.
  • the resonant radiation signal forms a plurality of peaks and troughs on the transmission line, 2-1, 2-2, ..., and 3-1, 3-2, ....
  • the crests and troughs 2-1, 2-2, ..., and 3-1, 3-2, ... may be equivalent to an electric dipole to radiate the radiated signal.
  • FIG. 1 shows that transmission lines are provided on both left and right sides of the resonant cavity 1, it will be understood by those skilled in the art from the disclosure herein that the transmission lines 2-1, 2-2, ... may be disposed on only one side. 3-1, 3-2... Alternatively, the transmission lines can also be arranged in other directions to form radiation in multiple directions.
  • the transmission line includes at least one of an audio line, a control line, or a power line.
  • the transmission line feeds the radiation signal to the metal shell 1 in such a manner that the transmission line directly feeds the radiation signal to the metal shell 1.
  • a hard printed circuit board or a flexible hard printed circuit board is disposed in the metal case, and the transmission line is electrically connected to the hard printed circuit board or the flexible hard printed circuit board, and the hard printed circuit board or the flexible hard printed circuit board is electrically connected to the metal case
  • the transmission line can feed the radiation signal to the metal shell 1 through a circuit provided on a hard printed circuit board or a flexible hard printed circuit board.
  • a feed point and a feed point are provided in the cavity of the metal shell.
  • the transmission line is electrically connected to the metal shell via the feed point and the feed point. Since the position of the feeding point and the feeding point are different in the metal casing, the resonance frequency of the corresponding metal shell is different, so the antenna resonance frequency of the antenna device can be set by adjusting the position of the feeding point and the feeding point. In other words, the antenna resonance frequency can be changed by changing the position of the feed point and/or the feed point.
  • the resonant cavity as the radiated signal means that the wavelength of the radiated signal is comparable to the size of at least one dimension of the cavity.
  • the equivalent resonant length of the resonant cavity can be set to be one quarter of the wavelength of the radiated signal through the feed point and the feed point.
  • feed points and/or feed points may be placed at multiple locations within the metal shell to achieve similar effects, and those skilled in the art will know how to design according to the actual situation. Corresponding feed points and/or feed points need to be placed in the metal shell.
  • the transmission line can radiate a radiation signal, and can be in various forms, for example, a length of wire printed on a circuit board or a separate wire or the like.
  • the transmission line can be a separate wire.
  • the transmission line can be a headphone cord.
  • the wire control device of the earphone can be placed in the metal case. This saves space.
  • the wire control device may affect the resonance of the radiation signal within the metal casing.
  • the resonant frequency and/or resonant mode can be adjusted or set by the feed point and/or feed point.
  • the shape of the cavity of the resonant cavity 1 includes a cylindrical shape.
  • the cavity has a metal cover at both ends, the metal cover has a wire hole, and the transmission line is led out through the wire hole.
  • the hard printed circuit board or the flexible circuit board is connected to the feeding point and the feeding point of the metal shell, and the transmission line is connected to the hard printed circuit board or the flexible circuit board, and the metal shell and the transmission line are fed through the feeding point and the feeding point.
  • the radiation signal is fed between.
  • a plurality of hard printed circuit boards are disposed in a metal case, and each of the hard printed circuit boards is connected through a flexible circuit board.
  • the transmission line can be connected to a hard printed circuit board or a flexible circuit board and fed between the metal case and the transmission line via a feed point and a feed point.
  • the frequency band of the radiated signal is a WiFi band or a Bluetooth band.
  • the size of the metal shell may be several centimeters.
  • FIG. 2 shows a schematic diagram of an example of an antenna device in accordance with one embodiment of the present disclosure.
  • Fig. 3 is a cross-sectional perspective view showing an example of the antenna device shown in Fig. 2.
  • the metal shell 10 includes a columnar body portion, a metal upper cover 11 and a metal lower cover 12.
  • the main body portion of the metal shell 10, the metal upper cover 11 and the metal lower cover 12 form a cavity as a resonant cavity for radiating signals.
  • the cross-sectional dimension of the metal shell 10 along the center line is 45 mm * 8 mm.
  • the metal shell 10 can also be of other shapes.
  • three layers of hard printed circuit boards 15, 16, 17, and two layers of flexible circuit boards 18, 19 are disposed in the metal casing 10.
  • the hard printed circuit boards 15, 16, 17 are connected to each other by flexible circuit boards 18, 19.
  • the transmission lines 13, 14 enter the cavity of the metal shell 10 from the metal upper cover 11 and the metal lower cover 12 via the via holes, respectively.
  • the transmission lines 13, 14 may be earphone cables, such as audio lines and/or control lines.
  • the total length of the headphone cord is 200mm.
  • the wire control device of the earphone can be disposed in the metal shell 10. Further, in order to secure the resonance effect, the minimum gap (distance) between the hard printed circuit boards 15, 16, 17 or the flexible circuits 18, 19 and the metal shell 10 is greater than or equal to 0.2 mm.
  • the transmission lines 13, 14 are connected to the hard printed circuit board 16.
  • the transmission line may include only a portion shown in Figures 2, 3, such as transmission line 13 or transmission line 14.
  • Other forms of metal shells are also contemplated by those skilled in the art in view of the teachings of the present disclosure, and the transmission lines 13, 14 may also be drawn from other locations.
  • the transmission lines 13, 14 can also be connected to other hard printed circuit boards or flexible circuit boards.
  • the transmission lines 13, 14 may also directly feed the radiation signal to the metal casing 10 without passing through a hard printed circuit board or a flexible circuit board.
  • the hard printed circuit boards 15, 16, 17 feed the radiation signal to the metal shell 10 through the feed point 20 and the feed points 21, 22, respectively.
  • Feed point 20 and feed points 21, 22 may be in the form of shrapnel.
  • the radiation signal resonates in the cavity of the metal shell 10.
  • the antenna resonance frequency of the antenna device can be set by the feed point 20 and the feed points 21, 22.
  • the wavelength of the radiation signal is comparable to the dimension of one dimension (e.g., longitudinal) of the cavity of the metal shell 10 such that the radiation signal resonates in the cavity.
  • the equivalent resonance length of the resonant cavity can be set by the feed point 20 and the feed points 21, 22 to be one quarter of the wavelength of the radiation signal.
  • the resonant radiation signal can be coupled to transmission lines 13, 14. As explained above with reference to Figure 1, the coupled radiation signals are radiated through the transmission lines 13, 14.
  • a metal shell can be used as the outer casing of the antenna device.
  • the example is illustrated by the process of emitting a radiation signal. Those skilled in the art will appreciate that the transmission and reception of the antenna device is symmetrical. Therefore, the opposite path can be used to receive the radiation signal. The process of receiving the radiation signal is not repeated here.
  • the antenna of the present invention has a simple structure and reduces design complexity.
  • the resonating portion (metal shell 10) herein may be an all-metal outer casing.
  • Such an antenna device can achieve miniaturization and high efficiency.
  • the antenna resonance frequency can be controlled by adjusting the position of the feed point and/or the feed point.
  • the antenna arrangement comprises a feed point 20 and two feed points 21, 22.
  • the resonant frequency and/or mode within the chamber can be controlled by adjusting the position of the feed point and the feed point.
  • the resonance depth can be controlled by adjusting the relative position of the feed point and the feed point.
  • the antenna device disclosed herein can obtain better performance parameters in a limited space.
  • the metal casing 10, the hard printed circuit boards 15, 16, 17, the flexible circuit boards 18, 19, the feed point 20, and the feed points 21, 22 together form a resonant cavity.
  • the resonant cavity can resonate with radiated signals in the WiFi or Bluetooth band.
  • the equivalent resonant length of the resonant cavity is a quarter wavelength of the radiated signal.
  • the transmission lines 13, 14 are connected to the metal shell 10 via the hard printed circuit boards 16, 15, 17, the flexible circuit boards 18, 19, the feed point 20, and the feed points 21, 22, the resonant radiation signals in the resonant cavity are coupled
  • the transmission lines 13, 14 are induced, and current distributions of the same frequency are induced on the outer surfaces of the transmission lines 13, 14.
  • the current distribution on the transmission lines 13, 14 can be equivalent to dipoles arranged next to each other. This equivalent dipole array can generate radiation to radiate the radiated signal.
  • the antenna device herein can be included in an online control Bluetooth headset.
  • the transmission line is a headphone cord of the wire-controlled Bluetooth headset, and a wire control device that sets the wire-controlled Bluetooth headset in the metal casing.

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Abstract

本发明公开了一种天线装置及线控蓝牙耳机。该天线装置包括：传输线和金属壳，其中，所述传输线从所述金属壳引出并耦合到所述金属壳，所述金属壳形成谐振腔的腔体，对要发射的辐射信号进行谐振并经由所述传输线辐射所述辐射信号；或者，经由所述传输线接收外部设备发送的辐射信号，对接收的辐射信号进行谐振，以得到所接收的辐射信号。根据本公开的实施例，可以提供一种结构简单的天线装置。

Description

天线装置及线控蓝牙耳机 技术领域
本发明涉及天线技术领域，更具体地，涉及一种天线装置和线控蓝牙耳机。
背景技术
在很多使用天线的电子设备中，用于布置天线的空间较小。天线净空区域有限。因此，天线的性能受到限制。
现在，越来越多的电子设备使用金属质感的壳体。金属质感的壳体会给用户带来一种时尚的感受。但是，在设计天线时，金属壳会对天线的辐射性能产生较大的不利影响。此外，诸如电机、麦克风等的金属件也会对天线产生显著影响。例如，天线与邻近的金属壳体或金属件的金属边框之间会产生较强的耦合，从而将天线的辐射束缚在天线近场，而不能产生有效的辐射。这会导致天线性能的进一步降低。
蓝牙设备越来越普及。蓝牙耳机可以通过蓝牙链路与诸如手机等音源设备进行通信。蓝牙耳机可以包括线控装置，可以通过线控装置与音源设备进行通信。蓝牙耳机可以是入耳式耳塞，也可以是头戴式耳机。入耳式耳塞形式的蓝牙耳机可以包括柔性或硬性的传输线，用于连接两个耳塞。
在蓝牙耳机中，用于布置电路和天线的空间十分有限。天线的性能受到影响。
因此，在现有技术中需要提出一种新的天线方案以针对现有技术中的至少一个技术问题。
发明内容
本发明的一个目的是提供用于天线装置的新技术方案。
根据本发明的第一方面，提供了一种天线装置，包括：传输线和金属 壳，其中，所述传输线从所述金属壳引出并耦合到所述金属壳所述金属壳形成谐振腔的腔体，对要发射的辐射信号进行谐振并经由所述传输线辐射所述辐射信号；或者，经由所述传输线接收外部设备发送的辐射信号，对接收的辐射信号进行谐振，以得到所接收的辐射信号。
可选地或另选地，所述传输线包括音频线、控制线或电源线中的至少一个。
可选地或另选地，在所述金属壳的腔体内设置有馈电点及馈地点，所述传输线经由馈电点和馈地点电连接到所述金属壳，以及通过所述馈电点和馈地点设置所述天线装置的天线谐振频率。
可选地或另选地，通过所述馈电点和馈地点设置所述谐振腔的等效谐振长度为所述辐射信号的波长的四分之一。
可选地或另选地，所述辐射信号的波长与所述腔体的至少一个维度的尺寸相比拟。
可选地或另选地，所述传输线是耳机线，以及在所述金属壳中设置耳机的线控装置。
可选地或另选地，所述腔体的形状包括柱形，所述腔体的两端具有金属封盖，所述金属封盖具有过线孔，所述传输线穿过所述过线孔与所述金属壳耦合。
可选地或另选地，在所述金属壳的腔体内设置有馈电点及馈地点，在所述金属壳中设置硬印刷电路板和柔性电路板中的至少一个，所述硬印刷电路板或柔性电路板与所述金属壳的馈电点和馈地点连接，所述传输线连接到所述硬印刷电路板或柔性电路板，并经由馈电点和馈地点在所述金属壳和所述传输线之间馈送所述辐射信号。
可选地或另选地，所述辐射信号的频段是WiFi频段或者蓝牙频段。
根据本发明的第二方面，提供了一种线控蓝牙耳机，包括根据任何一个实施例所述的天线装置，其中，所述传输线是所述线控蓝牙耳机的耳机线，以及在所述金属壳中设置所述线控蓝牙耳机的线控装置。
根据本发明公开的实施例，可以提供一种结构简单的天线装置。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其 它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例，并且连同其说明一起用于解释本发明的原理。
图1示出了根据本发明公开的一个实施例的天线装置的示意图。
图2示出了根据本发明公开的一个实施例的天线装置的例子的示意图。
图3示出了图2所示的天线装置的例子的剖面透视图。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
图1示出了根据本发明公开的一个实施例的天线装置的示意图。
在这个实施例中，天线装置包括传输线和金属壳。传输线从金属壳引出并耦合到金属壳。金属壳形成谐振腔1的腔体，以作为辐射信号的谐振腔1，对要发射的辐射信号进行谐振并经由传输线辐射辐射信号。
本领域技术人员应当理解，基于天线理论，天线的发射和接收是对称的。因此，本发明公开中天线装置可以用于发射辐射信号，也可以用于接 收辐射信号。在接收辐射信号时，金属壳经由传输线接收外部设备发送的辐射信号，对接收的辐射信号进行谐振，以得到所接收的辐射信号。
通常来说，可以有多种方式将传输线与金属壳耦合。例如，可以通过馈电点和/或馈地点将传输线与金属壳直接或间接电连接在一起。也可以通过电磁耦合将传输线与金属壳耦合。由于这不是本发明所关注的，本发明对此不做限制，并且在这里省略对它的详细描述。
需要说明的是，所述辐射信号可以是在金属壳内被转换成在传输线中传输的信号。例如，传输线是音频线，此时辐射信号在金属壳内被转换成音频线传输的音频信号。此外，所述辐射信号也可以是在金属壳内产生的信号。例如，金属壳是线控装置，此时辐射信号是在线控装置与诸如手机等的电子设备之间传递的控制信号。这些不是本发明所关注的，因此，不在这里进行详细描述。
此外，本领域技术人员应当理解，所述天线装置既可以作为发射天线，也可以作为接收天线。关于发射信号和接收信号的分离不是本发明所关注的，因此，在这里也不进行详细描述。
在现有技术中，通常形成单个电偶极子(单极化)或一对电偶极子(正交极化天线)形成天线的辐射单元。对辐射单元馈电(辐射信号和/或接地信号)以辐射辐射信号。因此，与现有技术相比，这里提出的天线装置的设计方式是完全不同的。
如图1所示，金属壳1可以作为辐射信号的谐振腔。当将辐射信号馈送到金属壳1中时，辐射信号在谐振腔中发生谐振。在这里，传输线从金属壳1穿出，因此，谐振的辐射信号可以被耦合到传输线。如图1所示，谐振的辐射信号会在传输线上形成多个波峰和波谷对2-1、2-2……和3-1、3-2……。所述波峰和波谷对2-1、2-2……和3-1、3-2……可以等效成电偶极子，从而将辐射信号辐射出去。
尽管图1示出了在谐振腔1左右两侧都设置传输线，但是，根据这里公开的内容，本领域技术人员应当能够理解，可以仅在一侧设置传输线2-1、2-2……或3-1、3-2……。可选地，还可以在其他方向设置传输线，以形成多个方向的辐射。
进一步的，传输线包括音频线、控制线或电源线中的至少一个。
进一步的，传输线将辐射信号馈送至金属壳1的方式可以是传输线直接将辐射信号馈送到金属壳1。或者，在金属壳内设置有硬印刷电路板或柔性硬印刷电路板，且传输线与硬印刷电路板或柔性硬印刷电路板电连接，硬印刷电路板或柔性硬印刷电路板与金属壳电连接时，传输线可以通过设置在硬印刷电路板或柔性硬印刷电路板上的电路将辐射信号馈送到金属壳1上。
在一个例子中，在金属壳的腔体内设置有馈电点及馈地点。传输线经由馈电点和馈地点电连接到金属壳。由于金属壳内，馈电点与馈地点间的位置不同，对应的金属壳的谐振频率不同，因此可以通过调整馈电点和馈地点的位置设置天线装置的天线谐振频率。换句话说，通过改变馈电点和/或馈地点的位置可以改变天线谐振频率。
通常来说，作为所述辐射信号的谐振腔意味着辐射信号的波长与腔体的至少一个维度的尺寸相比拟。例如，可以通过馈电点和馈地点设置谐振腔的等效谐振长度为辐射信号的波长的四分之一。
基于本发明公开的内容，本领域技术人员应当理解，可以在金属壳内的多个位置设置馈电点和/或馈地点以得到类似的效果，并且本领域技术人员应当知道，如何根据实际设计需要在金属壳中设置相应的馈电点和/或馈地点。
在这里，传输线能够辐射辐射信号，并且可以是各种形式的，例如，印刷在电路板上的一段导线或者独立的导线等。优选地，传输线可以是独立的导线。例如，通常，在蓝牙耳机中，左右两个耳塞通过导线连接。因此，在蓝牙耳机中设置本发明公开的天线装置是特别有利的。在这种情况下，传输线可以是耳机线。此外，还可以将耳机的线控装置设置在金属壳中。这样可以节省空间。当在金属壳中设置线控装置时，线控装置可能对辐射信号在金属壳内的谐振产生影响。如前面所述，可以通过馈电点和/或馈地点来调整或设置谐振频率和/或谐振模式。
通常，谐振腔1的腔体的形状包括柱形。例如，腔体的两端具有金属封盖，金属封盖具有过线孔，以及传输线经由过线孔引出。
还可以在金属壳的腔体内设置有馈电点及馈地点，且在金属壳中设置硬印刷电路板和柔性电路板中的至少一个。此时，硬印刷电路板或柔性电路板与金属壳的馈电点和馈地点连接，传输线连接到硬印刷电路板或柔性电路板，并经由馈电点和馈地点在金属壳和所述传输线之间馈送辐射信号。例如，在金属壳中设置多层硬印刷电路板，并通过柔性电路板连接各个硬印刷电路板。传输线可以连接到硬印刷电路板或柔性电路板，并经由馈电点和馈地点在金属壳和传输线之间馈送所述辐射信号。
对于无线耳机来说，优选地，辐射信号的频段是WiFi频段或者蓝牙频段。在这种情况下，金属壳的尺寸可以是几厘米。
图2示出了根据本公开的一个实施例的天线装置的例子的示意图。图3示出了图2所示的天线装置的例子的剖面透视图。
可以参照图2、3解释根据本发明公开的实施例。但是，本领域技术人员应当理解，图2、3所示的例子仅是解释性的，而不应看作是对实施例和/或专利保护的任何限制。
如图2、3所示，金属壳10包括柱状的主体部分、金属上盖11和金属下盖12。金属壳10的主体部分、金属上盖11和金属下盖12形成腔体，作为辐射信号的谐振腔。例如，金属壳10沿中心线的截面尺寸是45mm*8mm。本领域技术人员应当理解，金属壳10还可以是其它形状的。
在这个例子中，在金属壳10中设置3层硬印刷电路板15、16、17，2层柔性电路板18、19。硬印刷电路板15、16、17通过柔性电路板18、19相互连接。传输线13、14分别从金属上盖11和金属下盖12经由过线孔进入金属壳10的腔体。
在蓝牙线控耳机的情况下，所述传输线13、14可以是耳机线，例如，音频线和/或控制线。例如，耳机线的总长度是200mm。在这种情况下，可以将耳机的线控装置设置在金属壳10中。此外，为了保证谐振效果，硬印刷电路板15、16、17或柔性电路18、19板与金属壳10之间的最小缝隙(距离)大于或等于0.2mm。
这里，传输线13、14连接到硬印刷电路板16。本领域技术人员应当理解，传输线可以仅包括图2、3中所示的一部分，例如，传输线13或传 输线14。根据本发明公开的教导，本领域技术人员还可以想到其它形式的金属壳，以及传输线13、14还可以从其它部位引出。此外，传输线13、14还可以连接到其它硬印刷电路板或柔性电路板。可选地，传输线13、14还可以直接将辐射信号馈送到金属壳10，而不经过硬印刷电路板或柔性电路板。
这里，硬印刷电路板15、16、17分别通过馈电点20和馈地点21、22，将辐射信号馈送到金属壳10。馈电点20和馈地点21、22可以是弹片形式的。辐射信号在金属壳10的腔体中进行谐振。可以通过馈电点20和馈地点21、22设置天线装置的天线谐振频率。
辐射信号的波长和金属壳10的腔体的一个维度(例如，纵向)的尺寸相比拟，从而使得辐射信号在腔体中发生谐振。这里，可以通过所述馈电点20和馈地点21、22设置所述谐振腔的等效谐振长度为所述辐射信号的波长的四分之一。
谐振后的辐射信号可以耦合到传输线13、14。如前面参照图1所解释的那样，所耦合的辐射信号通过传输线13、14被辐射出去。
在这里，可以使用金属壳作为天线装置的外壳。在这里，以发射辐射信号的过程说明了这个例子。本领域技术人员应当理解，天线装置的发送和接收是对称的。因此，可以利用相反的路径接收辐射信号。在这里不对接收辐射信号的过程进行重复描述。
与传统的天线相比，本发明所述天线结构简单，降低了设计复杂度。
此外，这里的谐振部分(金属壳10)可以是全金属的外壳。这样的天线装置可以实现小型化并具有高的效率。
这里可以通过调整馈电点和/或馈地点(的位置)控制天线谐振频率。在图2、3的例子中，天线装置包括一个馈电点20和两个馈地点21、22。通过调整馈电点和馈地点(的位置)，可以控制腔体内的谐振频率和/或模式。例如，当馈地点的位置固定时，可通过调整馈电点与馈地点的相对位置来控制谐振深度。
这里公开的天线装置可以在有限的空间内得到较好的性能参数。
在这个例子中，金属壳10、硬印刷电路板15、16、17、柔性电路板 18、19、馈电点20和馈地点21、22共同构成一个谐振腔。例如，该谐振腔可以对WiFi或蓝牙频段的辐射信号产生谐振。例如，通过设置馈电点20和馈地点21、22的位置，所述谐振腔的等效谐振长度是辐射信号的四分之一波长。由于传输线13、14经由硬印刷电路板16、15、17、柔性电路板18、19、馈电点20和馈地点21、22连接到金属壳10，因此，谐振腔中谐振的辐射信号被耦合到传输线13、14，并在传输线13、14的外表面感应出相同频率的电流分布。如参照图1所述，在传输线13、14上的电流分布可以等效成紧挨在一起排列的偶极子。这种等效偶极子阵列可以产生辐射，以将辐射信号辐射出去。
尽管没有示出，但是，这里的天线装置可以被包括在线控蓝牙耳机中。所述传输线是所述线控蓝牙耳机的耳机线，以及在所述金属壳中设置所述线控蓝牙耳机的线控装置。
虽然已经通过例子对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (10)

  1. 一种天线装置，包括：传输线和金属壳，
    其中，所述传输线从所述金属壳引出并耦合到所述金属壳，所述金属壳形成谐振腔的腔体，对要发射的辐射信号进行谐振并经由所述传输线辐射所述辐射信号；或者，经由所述传输线接收外部设备发送的辐射信号，对接收的辐射信号进行谐振，以得到所接收的辐射信号。
  2. 根据权利要求1所述的天线装置，其中，所述传输线包括音频线、控制线或电源线中的至少一个。
  3. 根据权利要求1或2所述的天线装置，其中，在所述金属壳的腔体内设置有馈电点及馈地点；
    所述传输线经由馈电点和馈地点电连接到所述金属壳，以及通过所述馈电点和馈地点设置所述天线装置的天线谐振频率。
  4. 根据权利要求1-3中的任意一项所述的天线装置，其中，通过所述馈电点和馈地点设置所述谐振腔的等效谐振长度为所述辐射信号的波长的四分之一。
  5. 根据权利要求1-4中的任意一项所述的天线装置，其中，所述辐射信号的波长与所述腔体的至少一个维度的尺寸相比拟。
  6. 根据权利要求1-5中的任意一项所述的天线装置，其中，所述传输线是耳机线，以及在所述金属壳中设置耳机的线控装置。
  7. 根据权利要求1-6中的任意一项所述的天线装置，其中，所述金属壳的形状包括柱形，所述金属壳的两端具有金属封盖，所述金属封盖具有过线孔，所述传输线穿过所述过线孔与所述金属壳耦合。
  8. 根据权利要求1-7中的任意一项所述的天线装置，其中，在所述金属壳的腔体内设置有馈电点及馈地点，在所述金属壳中设置硬印刷电路板和柔性电路板中的至少一个，所述硬印刷电路板或柔性电路板与所述金属壳的馈电点和馈地点连接，所述传输线连接到所述硬印刷电路板或柔性电路板，并经由馈电点和馈地点在所述金属壳和所述传输线之间馈送所述辐射信号。
  9. 根据权利要求1-8中的任意一项所述的天线装置，其中，所述辐射信号的频段是WiFi频段或者蓝牙频段。
  10. 一种线控蓝牙耳机，包括根据权利要求1-9中的任何一个所述的天线装置，其中，所述传输线是所述线控蓝牙耳机的耳机线，以及在所述金属壳中设置所述线控蓝牙耳机的线控装置。
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