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| US20070069954 FIELD OF THE INVENTION |
多波段天线 |
[0001] This invention relates in general to antennas, and more specifically, to multi-band antenna systems.
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[0001] 本发明通常涉及天线，更特别地，涉及多波段天线系统。
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| [0002] Multi-band antennas are used in communication devices that operate in a plurality of frequency bands to support operation of multiple communication protocols. Many of these devices now have internal antennas which in contrast to external antennas, are installed within the housing of the devices. The advantages of an internal antenna include reinforcement of shock resistance, reduction of manufacturing costs, an esthetically pleasing form factor etc. Some internal antennas are formed by a plated conductor on a substantially flat circuit board. One challenge faced while designing an internal antenna is the interference with other components and circuits inside the wireless communication device. Another challenge is having enough space on the circuit to place the antenna as many portable communications devices require a small, portable size. |
[0002] 多波段天线使用在通信设备中，该通信设备操作于多个频段以支持多种通信协议的操作。目前这些设备中许多都具有与外部天线相对的内部天线，其安装在设备外壳内。内部天线的优点包括抗冲击度增强、生产成本降低、外形美观的因素等等。某些内部天线通过充分平坦的电路板上的镀敷导体形成。设计内部天线所面临的一个挑战是与无线通信设备内部其它部件及电路的干扰。另一个挑战是在电路上有足够的空间来按照多个便携式通信设备需要小的、便携的尺寸来放置天线。 |
| [0003] Therefore, the characteristics required for internal antennas designed for these devices include compact size, minimum interference with other components and circuits inside the device, while maintaining the capability to operate with acceptable efficiency in multiple frequency bands. |
[0003] 因此，在维持在多个频段内以可接受的效率操作的能力时，为这些设备设计内部天线所需的特征包括紧密的尺寸、与设备内其它部件及电路的最小的干扰。 |
| [0004] In multi-band antenna operation, the antenna can be used to operate in more than one frequency band in order to accommodate multiple communications systems or protocols that are designed to operate in a given frequency band. It is desirable to be able to produce wireless communication devices capable of operating according to more than one communication protocol. This may necessitate transmitting and receiving signals in different frequency bands. |
[0004] 在多波段天线操作中，为了适合于被设计为在给定频段内操作的多个通信系统或协议，天线可用于在多于一个频段内操作。所需的是，能够制造可根据多于一个通信协议操作的无线通信设备。这可能使在不同频段内发射及接收信号成为必要的。 |
[0005] Therefore, compact-sized internal antennas, capable of minimizing internal interference while operating in multiple frequency bands, are desirable.
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[0005] 因此，所需的是，能够在操作于多个频段内时最小化内部干扰的、紧凑尺寸的内部天线。 |
| [0006] The present invention is illustrated by way of example and not limitation in the accompanying figures, in which like references indicate similar elements, and in which: |
[0006] 通过在附图中例示而非限制性地来例示本发明，其中相同的参考指示相同的元件，并且其中： |
[0007] FIG. 1 is an exemplary embodiment of a multi-band antenna system in accordance with the present invention;
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[0007] 图1例示了根据本发明的多波段天线系统的实施例； |
[0008] FIG. 2 is an exemplary embodiment of a multi-band antenna system illustrating the conducting elements in the multi-band antenna system when operating in a low frequency band;
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[0008] 图2是多波段天线系统的示例性实施例，其例示了在操作于低频段时多波段天线系统内的传导元件； |
| [0009] FIG. 3 is an exemplary embodiment of a multi-band antenna system illustrating the conducting elements in the multi-band antenna system when operating in a high frequency band; |
[0009] 图3是多波段天线系统的示例性实施例，其例示了在操作于高频段时多波段天线系统内的传导元件： |
| [0010] FIG. 4 is a set of tables showing the antenna efficiency of the multi-band antenna system. |
[0010] 图4是表示多波段天线系统的天线效率的表的组： |
[0011] FIG. 5 is an exemplary return-loss plot for the multi-band antenna system.
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[0011] 图5是用于多波段天线系统的示例性回波损耗绘图。 |
| [0012] Skilled artisans will appreciate that elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of embodiments of the present invention. |
[0012] 本领域技术人员会认识到，图中的元件是为了简化和清楚而例示的，没有必要按比例绘制。例如，图中某些元件的尺寸相对于其它元件是被夸大的，从而有助于提高对本发明实施例的理解。
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| [0013] Before describing in detail the particular multi-band antenna system and the wireless communication device, in accordance with the present invention, it should be observed that the present invention resides primarily in combinations of apparatus components related to the multi-band antenna system and the wireless communication device. Accordingly, the apparatus components have been represented where appropriate by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein. |
[0013] 在详细描述根据本发明的特定多波段天线系统及无线通信设备之前，应当注意到，本发明主要存在于有关多波段天线系统及无线通信设备的装置部件的组合中。因而，在附图中通过传统的符号合适地面示了装置部件，仅表示那些理解本发明有关的特定细节，从而不会使那些从本说明获益的本领域普通技术人员容易理解的细节模糊了本公开。 |
| [0014] In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element preceded by "comprises . . . a" does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element. |
[0014] 在本文件中，相关的术语例如“第一”和“第二”等可单独使用来区分一个实体或动作与另一个实体或动作，而不必在这些实体或动作间需要或暗示任何实际的这种关系或次序。术语“包括”、 “包括的”或任何其变化期望覆盖非排他性的包括，这样包括一系列元素的过程、方法、物品或装置就不仅包括这些元素，还可包括其它没有明确列举的或这些过程、方法、物品或装置固有的其它元素。在没有更多约束的情况下，前面有“包括……”的元素不排除在包括该元素的过程、方法、物品或装置中存在额外的同样的元素。 |
| [0015] The term "another", as used herein, is defined as at least a second or more. The terms "including" and/or "having", as used herein, are defined as comprising. The term "coupled", as used herein with reference to electrical technology, is defined as connected, although not necessarily directly, and not necessarily mechanically. |
[0015] 在此使用的术语“另一个”被定义为至少第二个或更多。在此使用的术语“包括”和／或“具有”被定义为包含。在此参考电子技术使用的术语“耦合”并定义为连接，尽管不必是直接的，也不必是机械地。 |
| [0016] FIG. 1 is an illustration of one exemplary embodiment of a multi-band antenna system 100. The multi-band antenna system 100 is used to send and receive signals within a plurality of wireless communication devices, networks or combinations thereof. The multi-band antenna system 100 may be implemented as an internal antenna with broadband characteristics operating in multiple frequency bands. Broadband operation is useful in providing adequate bandwidth to accommodate multiple communication protocols with the one antenna system 100, for example Global System for Mobile Communications (GSM) communication in nominal 800 MHz and nominal 900 MHz bands all the way up to 2400 MHz to include 802.11 and Bluetooth communications for example. |
[0016] 图1例示了多波段天线系统100的一个示例性实施例。该多波段天线系统100用于在多个无线通信设备、网络或其组合内发送和接收信号。该多波段天线系统100可实现为具有在多个频段内操作的宽带特征的内部天线。宽带操作在提供足够的带宽以使多个通信协议适应于一个天线系统100是有用的，该天线系统100例如全球移动通信系统(GSM)，该GSM通信系统是处于标称的800MHz及标称的900MHz频段一直到2400MHz，从而包括例如802．11及蓝牙通信。 |
| [0017] In one exemplary embodiment, the multi-band antenna system 100 is tuned to operate within two general radio frequency ranges which are generally referred to as a low band and a high band. The low band in this exemplary embodiment is below 1000 MHz and the high band is above 1000 MHz. Within the low band and the high band, the multi-band antenna system 100 may operate at multiple frequency sub-bands. In this exemplary embodiment, the multi-band antenna system 100 may be tuned such that the antenna performs as a hepta-band antenna operating over seven frequency bands within both the low band and the high band. The seven frequency bands used in this embodiment, as an example, include AMPS (800 MHz), GSM (900 MHz) which are in the low band, and GPS (1500 MHz), DCS (1800 MHz), PCS (1900 MHz), 3G (2100 MHz), and Bluetooth (2400 MHz) which are in the high band. It is understood by one of ordinary skill in the art that bands may be referred to generally by a rounded off frequency value, or midpoint frequency, and not the specific frequencies which make up the frequency band of operation. For example, the 800 MHz band commonly used for cellular radiotelephone operation is referred to as the 800 MHz band having operating frequencies ranging from 824 MHz to 894 MHz. |
[0017] 在一个例示的实施例中，多波段天线系统100被调谐为在两个通常的射频范围内操作，这两个通常的射频范围通常称作低波段及高波段。在该示例性实施例中低波段低于1000MHz，而高波段高于1000MHz。在低波段和高波段内，多波段天线系统100可在多个频率子波段上操作。在该示例性实施例中，多波段天线系统100可被调谐，这样天线按照在低波段和高波段内的7个频段上操作的7波段天线而执行。作为例子，在该实施例中使用的7个频段包括：低波段内的AMPS (800MHz)、GSM(900MHz)，以及高波段内的GPS(1500MHz)、DCS(1800MHz)、PCS(1900MHz)、3G(2100MHz)和蓝牙(2400MHz)。本领域普通技术人员应理解，波段通常指的是对频率值、或中点频率进行舍入，而不是组成操作频段的特定频率。例如，通常用于蜂窝无线电话操作的800MHz波段指的是具有从824MHz到894MHz范围的操作频率的800MHz波段。 |
| [0018] It is also understood that the multi-band antenna system 100 may also be tuned to operate in other frequency bands. The multi-band antenna system 100 may also be tuned to operate in fewer frequency bands than the seven bands used in this exemplary embodiment. One of ordinary skill in the art will appreciate the operation and tuning of the antenna elements and frequency bands. |
[0018] 还应当理解，多波段天线系统100还可被调谐为在其它频段内操作。该多波段天线系统100还可被调谐为，在比该示例性实施例中使用的7波段更低的频段内操作。本领域普通技术人员可理解天线元件及频段的操作和调谐。 |
| [0019] The multi-band antenna system 100 illustrated in FIG. 1 comprises a ground 101 or ground surface, or ground plane or any combination thereof, a first conductor 102 which is spaced from the ground surface in this exemplary embodiment, a second conductor 104 coupled to the first conductor 102, a feed conductor 106, and a ground conductor 108. In this exemplary embodiment, the ground is provided by one layer of a circuit board which in this embodiment is a multi-layer circuit board. The multi-layer circuit board may also support and interconnect various electrical components in the wireless communication device. Examples of such components include a microphone, a camera, a radio frequency (RF) connector, a speaker, and a vibration mechanism. In one embodiment for example, the ground surface 101 includes several inter-connected layers of the multi-layer circuit board. |
[0019] 图1例示的多波段天线系统100包括：地101或地面、或地平面及其任何组合：在该示例性实施例中从地面隔开的第一导体102；耦合到第一导体102的第二导体104；馈送导体106；及接地导体108。在该示例性实施例中，通过电路板的一层提供地，该电路板在该实施例中是多层电路板。该多层电路板还可支撑并互连无线通信设备中的多种电子部件。这些部件的例子包括麦克风、相机、射频(RF)连接器、扬声器及振动机构。在例如一个实施例中，地面101包括多层电路板的若干相互连接的层。 |
| [0020] The multi-band antenna system 100 can be incorporated into a wireless communication device as an internal antenna system. In one embodiment, the multi-band antenna system 100 can be embedded/incorporated in mobile handsets, wireless LAN enabled devices, satellite/GPS devices, personal digital assistants (PDA's), musical devices such as MP3 players having wireless connectivity, computers and so forth. |
[0020] 该多波段天线系统100可作为内部天线系统被并入在无线通信设备中。在一个实施例中，多波段天线系统100可被嵌入／并入在移动手机、启用无线LAN的设备、卫星／GPS设备、个人数字助理(PDA)、诸如具有无线连接的MP3播放器的音乐设备、计算机等中。 |
| [0021] The first conductor 102 and the second conductor 104 are used for transmission and reception of electromagnetic energy by converting radio waves into electrical signals, and vice versa. The first conductor 102 has a first physical length. In one exemplary embodiment, the first conductor 102 is a loop conductor. The first conductor 102 resonates in the low band and in a first frequency sub band of the high band. The first physical length is at least partially if not substantially equal to a half wavelength of the frequencies (i.e. sub frequency bands) associated with the low band. The first physical length is at least partially if not substantially equal to a full wavelength corresponding to the frequencies (i.e. sub frequency bands) associated with the first frequency sub band. |
[0021] 第一导体102和第二导体104用于通过将无线波转换成电信号来发射和接收电磁能量，反之亦然。第一导体102具有第一物理长度。在一个例示的实施例中，第一导体102是环导体。该第一导体102在低波段和在高波段的第一频率子波段内谐振。该第一物理长度是，(如果不是基本上等于的话)则至少部分等于与低波段关联的频率(即子频段)的半波长。该第一物理长度是，(如果不是基本上等于的话)则至少部分等于与同第一频率子波段关联的频率 (即子频段)相对应的全波长。 |
[0022] The low band in this exemplary embodiment includes an 800 MHz band and a 900 MHz band. In this embodiment, for example, the antenna would operate in the 800 MHz cellular band having a frequency range of 824 MHz to 894 MHz and the 900 MHz band having a frequency range from 880 MHZ to 960 MHz.
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[0022] 在该示例性实施例中，低波段包括800MHz波段和900MHz波段。在该实施例中，例如，天线可在具有824MHz到894MHz的频率范围的800MHz蜂窝波段、以及具有从880MHz到960MHz的频率范围的900MHz波段内操作。 |
[0023] The first frequency sub band is a portion of the high band. In this exemplary embodiment, the high frequency band includes frequency bands of 1500 MHz, 1800 MHz, 1900 MHz, 2100 MHz, and 2400 MHz. The first conductor 102 may resonate effectively from the 1900 MHz bandwidth to the 2400 MHz bandwidth.
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[0023] 该第一频率子波段是高波段的一部分。在该示例性实施例中，高频段包括1500MHz、1800MHz、1900MHz、2100MHz及2400MHz的频段。第一导体102可有效地从1900MHz带宽到2400MHz带宽谐振。 |
| [0024] In the exemplary embodiment, shown in FIG. 1, the second conductor 104, is a conductor having a dipole antenna structure. In this illustrated embodiment, the dipole antenna structure is a folded dipole antenna 104 having a first and second bend. The first and second bend allow the second conductor to maintain the second physical length while meeting the other physical constraints such as the size of the first conductor 102 loop antenna structure. The second conductor 104 resonates in a portion of the high band. In this exemplary embodiment, the second conductor 104 resonates at a second frequency sub band of the high band which is substantially not covered by the operating frequency range of the first conductor 102. The second conductor 104 has a second physical length. The second physical length is equal to two quarter wavelengths of at least a portion of frequencies in the high band (i.e. covering the second sub band). A first quarter wavelength portion extending in one direction from the signal source or feed point and a second quarter wavelength extending in the opposite direction from the signal source. In this exemplary embodiment the second conductor 104 resonates in the second frequency sub band that has a bandwidth substantially of 1500 MHz to 1900 MHz bandwidth. As discussed above, the first conductor 102 resonates substantially between 1900 MHz and 2400 MHZ, the first frequency sub band, such that the entire high band is covered by both antennas. The first conductor 102 and the second conductor 104 are also coupled to the same feed point. In one embodiment, the first conductor 102 and the second conductor 104 are capacitively coupled in addition to being coupled to the same feed point. |
[0024] 在图1所示的该示例性实施例中，第二导体104是具有偶极天线结构的导体。在所例示的实施例中，偶极天线结构是具有第一和第二弯曲的折叠偶极天线104。该第一和第二弯曲允许第二导体在遇到其它物理约束(例如第一导体102环天线结构的尺寸)时，能维持第二物理长度。第二导体104在高波段的一部分内谐振。在该示例性实施例中，第二导体104在高波段的第二频率子波段上谐振，该高波段基本上没有被第一导体102的操作频率范围覆盖。第二导体104具有第二物理长度。该第二物理长度等于高波段中至少一部分频率的两个四分之一波长(即覆盖第二子波段)。第一个四分之一波长部分在一个方向上从信号源或馈送点延伸，而第二个四分之一波长在相反的方向上从信号源延伸。在该示例性实施例中，第二导体104在第二频率子波段中谐振，该第二频率子波段具有基本上1500MHz到1900MHz带宽的带宽。如上所述，第一导体102基本上在1900MHz及2400MHz间、第一频率子波段谐振，这样整个高波段由两个天线所覆盖。第一导体102和第二导体104还耦合到相同馈送点。在一个实施例中，第一导体102和第二导体104除耦合到相同馈送点外，还被电容性地耦合。 |
[0025] In the exemplary embodiment shown in FIG. 1, the first conductor 102 and the second conductor 104 are carried on a dielectric support 110. The dielectric support 110 may be a hollow support, formed by a void in the dielectric support thereby spacing the first conductor 102 and the second conductor 104 from the ground surface or the circuit board surface and the ground plane when the ground plane is a layer of the printed circuit board. Examples of materials from which the dielectric support 110 can be made include materials with low dielectric constants, material having low loss tangent, or the like. These materials may include but are not limited to polyimide and polycarbonates and the like. The first and second conductors may also be in the form of wires or conductive material carried on flat surfaces such as the dielectric support. The conductive material may be printed, deposited, sprayed, etched, taped or the like on a circuit board. The dipole may be a metal rod and the loop antenna portion may be a flexible wire loop. The material may take on various forms as understood by one of ordinary skill in the art.
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[0025] 在图1所示的例示性实施例中，第一导体102和第二导体104被承载在电介质支撑件110上。该电介质支撑件110可以是由电介质支撑件中的空隙形成的中空支撑件，从而当地平面是印刷电路板的一层时，使第一导体102和第二导体104同地面或电路板表面及地平面隔开。可制造电介质支撑件110的材料的例子包括具有低介电常数的材料、具有低损耗角正切等的材料。这些材料可包括但不限于聚酰亚胺及聚碳酸酯等。该第一和第二导体还可以是承载在例如电介质支撑件的平坦表面上的导线或传导材料的形式。该传导材料可被印刷、沉积、喷射、蚀刻、用胶带附着(taped)等在电路板上。偶极可以是金属棒，并且环天线部分可以是柔性导线环。所述材料可以采用本领域普通技术人员了解的各种形式。 |
| [0026] In one exemplary embodiment, the dielectric support 110 is selectively molded with at least two plastic materials. A first plastic material has the capability to be plated with metal conductive material while a second plastic martial will not receive the metal plating material. This allows the metal to be selectively plated on the dielectric support only forming on those areas having the first plastic. The conductor shape is therefore dictated by the conductive plastic shape. |
[0026] 在一个例示性的实施例中，电介质支撑件110利用至少两个塑料材料选择地进行模塑。第一个塑料材料能够用金属传导材料进行镀敷，而第二个塑料材料则不接收金属镀敷材料。这允许金属被选择性地镀敷在仅形成在那些具有第一塑料的区域上的电介质支撑件上。导体的形状因而由传导塑料的形状规定。 |
| [0027] In one exemplary embodiment, the void formed within the dielectric support 110 may be shaped to accommodate other components such as a speaker while maintaining an insignificant drop in performance of the multi-band antenna system 100. Consequently, the multi-band antenna system 100 is accommodated in a manner that is efficient in terms of the use of available space. Small wireless communication devices are in demand, therefore, efficient use of space is beneficial. |
[0027] 在一个例示性的实施例中，在保持多波段天线系统100性能的非显著下降的同时，在电介质支撑件110内形成的空隙可被成型为容纳其它的部件，例如扬声器。因而，以有效使用可用空间的方式来容纳多波段天线系统100。小的无线通信设备是需要的，因此，空间的有效使用是有益的。 |
| [0028] The first conductor 102 and the second conductor 104 are coupled to the single feed point or feed conductor 106. In this embodiment, the feed conductor 106 is part of the antenna length. When a feed conductor is present, the feed conductor 106 connects the first conductor 102 and the second conductor 104 to the single feed point. The single feed point is coupled to a single source and the single feed point provides the signal to both the first conductor 102 and the second conductor 104. The single feed point produces a uniform traveling wave of a desired frequency of the radio wave. |
[0028] 第一导体102和第二导体104被耦合到单一馈送点或馈送导体106。在该实施例中，馈送导体106是天线长度的一部分。当馈送导体存在时，馈送导体106将第一导体102和第二导体104连接到单一馈送点。该单一馈送点被耦合到单一源，并且该单一馈送点向第一导体102和第二导体104两者提供信号。该单一馈送点产生无线电波所需频率的均匀行波。 |
[0029] The first conductor 102 and the second conductor 104 are also coupled to the grounding conductor 108. In this embodiment, the grounding conductor 108 connects the first conductor 102 and the second conductor 104 to the ground surface 101. As shown in FIG. 1, the feed conductor 106, and the grounding conductor 108 are carried on a portion of the dielectric support 110. The feed conductor 106, and the grounding conductor 108 may be plated on the dielectric support or may be adhesively constrained on the dielectric support 110. The feed conductor 106 and the grounding conductor 108 form electrical connections between the first conductor 102 and the second conductor 104.
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[0029] 第一导体102和第二导体104还耦合到接地导体108。在该实施例中，接地导体108将第一导体102和第二导体104连接到地面101。如图1所示，在电介质支撑件110的一部分上承载该馈送导体106及接地导体108。该馈送导体106及接地导体108可被镀在电介质支撑件上，或者以粘附方式限定在电介质支撑件110上。馈送导体106和接地导体108在第一导体102和第二导体104间形成电连接。 |
| [0030] The dielectric surface may take various shapes. In one embodiment, shown in FIG. 1-3, the dielectric is a six sided rectangle shape. In this embodiment, the first conductor 102 and the second conductor 104 lie (i.e. are carried) on one or more portions of the dielectric surface 110. The first conductor 102 and the second conductor 104 extend over four surfaces of the dielectric support 110 in the exemplary embodiment illustrated in FIG. 1. In another exemplary embodiment, the first conductor 102 lies on the edges of the dielectric support 110. The shape of the dielectric support 110 may conform to the housing of the device. The shape may conform to the components inside the housing such as the PCB, speakers, microphones, chip components, IC's or the like. The shape may be a function of both the housing and internal constraints. |
[0030] 电介质表面可采用各种形状。在一个实施例中，如图1—3所示，该电介质表面是六面的矩形形状。在该实施例中，第一导体102和第二导体104位于(即承载于)电介质表面110的一个或多个部分上。在图1所例示的示例性实施例中，第一导体102和第二导体104在电介质支撑件110的四个表面上延伸。在另一示例性实施例中，第一导体102位于电介质支撑件110的边缘上。该电介质支撑件110的形状可与设备外壳一致。该形状可与外壳内的部件一致，例如PCB、扬声器、麦克风、芯片部件、IC等。该形状可以是外壳及内部约束两者的函数。 |
| [0031] FIG. 2 illustrates the multi-band antenna system 100 showing the conductors elements 102, 104 in the multi-band antenna system 100 operating in a low frequency band. FIG. 2 also shows an overlay line drawing of the first conductor 102 and the second conductor 104. A first line overlay 202 shows the basic shape of the first conductor 102 and a second line overlay 210 shows the basic shape of the second conductor 104. Point 208 denotes an open circuit (high impedance) point in the first conductor 102 in the low frequency band. Points 204 and 206 denote the short circuit (low impedance) points in the first conductor 102 which resonates at the low band. |
[0031]图2例示了多波段天线系统100，其表示在低频段中操作的多波段天线系统100中的导体元件102、104。图2还表示了第一导体102和第二导体104的线叠置图。第一线叠置202表示第一导体102的基本形状，而第二线叠置210表示第二导体104的基本形状。点208表示低频段内第一导体102中的开路(高阻抗)点。点204和206表示在低波段处谐振的第一导体102中的短路(低阻抗)点。 |
| [0032] The portions between the short circuit points 204 and 206, and the open circuit point 202 of the first conductor 102, form antenna elements in the multi-band antenna system 100 in the low frequency band. This enables the creation of two antenna elements, each a quarter wavelength in length in the low frequency band. Each antenna element either resonates independently, or increases the total bandwidth of operation of the multi-band antenna system 100, in the low frequency band. Exemplary low frequency bands include the 800 MHz band and the 900 MHz band as discussed above. |
[0032] 短路点204和206间的部分、以及第一导体102的开路点202，形成了低频段内多波段天线系统100中的天线元件。这实现了创建两个天线元件，每一个在低频段内具有四分之一波长的长度。在低频段内，每个天线元件或者独立谐振，或者增加多波段天线系统100的总操作带宽。例示的低频段包括上述的800MHz波段和900MHz波段。 |
| [0033] FIG. 3 illustrates the multi-band antenna system 100 showing the conductors elements 102, 104 and the corresponding line overlays 208 and 210 however with the antenna operating in a high frequency band. Points 302, 304, and 306 denote short circuit (i.e. low impedance) points in the first conductor 102 and the second conductor 104. Points 308, 310, 312, and 314 denote open circuit (high impedance) points in both the first conductor 102 and the second conductor 104. |
[0033] 图3例示了多波段天线系统100，其表示了导体元件102、104和对应的线叠置208、210，但是天线在高频段内操作。点302、304及306表示第一导体102和第二导体104内的短路(即低阻抗)点。点308、310、312及314表示第一导体102和第二导体104内的开路(高阻抗)点。 |
| [0034] The portions between the short circuit points 302, 304, and 306 and the open circuit points 308, 310, 312, and 314 of the first conductor 102, and the second conductor 104, form antenna elements in the multi-band antenna system 100 in the high frequency band. |
[0034] 第一导体102和第二导体104的短路点302、304和306与开路点308、310、312、和314间的部分，形成了高频段内多波段天线系统100内的天线元件。 |
| [0035] This allows the creation of six quarter wavelength antenna elements in the high frequency band. For example, amongst the six antenna elements, one antenna element is formed by the portion between the short circuit point 302 and the open circuit point 308. Each antenna element either resonates independently or increases the total bandwidth of operation in the high frequency band. |
[0035] 这允许创建高频段内的6个四分之一波长的天线元件。例如，在6个天线元件中，一个天线元件由短路点302和开路点308之间的部分形成。每一个天线元件或者独立谐振，或者增加高频段内的总操作带宽。 |
[0036] FIG. 4 is a table 400 showing antenna efficiency of the multi-band antenna system 100 for different frequencies. The antenna efficiency is used to express the ratio of the total radiated power divided by the net power received by the multi-band antenna system 100. The table 400 shows the antenna efficiency at multiple exemplary frequencies bands in which the multi-band antenna system 100 operates. For example, the table shows that the antenna efficiency at 894 MHz is 63.32 percent and at 1575 MHz is 66.07. It is understood that the measurements may vary and that these are exemplary measurements to show the efficiency of the antenna system over the plurality of sub bands in both the high and low bands.
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[0036] 图4是表示对于不同频率多波段天线系统100的天线效率的表400。天线效率用于表达总辐射功率除以多波段天线系统100接收到的净功率的比率。表400表示在多波段天线系统100所操作的多个例示性频段处的天线效率。例如，该表表示了894MHz处的天线效率是63．32％，以及1575MHz处的天线效率是66．07％。应当理解，该测量可以变化，并且这些都是用于表示高波段和低波段内多个子波段上的天线系统效率的示例性测量。 |
| [0037] In conjunction with FIG. 4, FIG. 5 is an exemplary return loss plot showing seven RF bands of operation for the multi-band antenna system 100. The return loss plot 500 exemplifies which bands the multi-band antenna operates in and which conductor (i.e. the first conductor 102 or the second conductor 104) operates in the respective RF band. In this embodiment, a first RF band 502 of operation and second RF band 504 of operation are in the low band. Also shown in this embodiment, are a third 506, a fourth 508, a fifth 510, a sixth 512, and a seventh band 514 of operation which are in the high band. |
[0037] 结合图4，图5是表示用于多波段天线系统100的7个RF操作波段的示例性回波损耗图。回波损耗图500例示了多波段天线操作在哪个波段，以及哪个导体(即第一导体102或第二导体104)在相应RF波段内操作。在该实施例中，第一RF操作波段502和第二RF操作波段504在低波段内。在该实施例中还表示了在高波段内的第三操作波段506、第四操作波段508、第五操作波段510、第六操作波段512、以及第七操作波段514。 |
| [0038] The first conductor 102 resonates in the first sub band of the high band, indicated by circle 501, which includes a portion of the 1900 MHZ band 510 of operation, the 2100 MHz band 512 of operation and the 2400 MHz band 514 of operation. The second conductor 104 resonates in a second sub band of the high band, indicated by circle 503, which includes the 1500 MHz band 506 of operation, the 1800 MHz band 508 of operation and a portion of the 1900 MHz band 510 of operation. The first conductor also resonates in the low band, indicated by circle 505, which includes the 800 MHZ band 502 of operation and the 900 MHZ band 504 of operation. The bands of operation may also be referred to as sub bands of the first and second sub band. |
[0038] 第一导体102在圆501表示的高波段的第一子波段内谐振，其包括1900MHz操作波段510的一部分、2100MHz操作波段512以及2400MHz操作波段514。第二导体104在圆503表示的高波段的第二子波段内谐振，其包括1500 MHz操作波段506、1800MHz操作波段508以及1900MHz操作波段510的一部分。第一导体还在圆505表示的低波段内谐振，其包括800MHz操作波段502和900MHz操作波段504。该操作波段还可称为第一和第二子波段的子波段。 |
| [0039] The multi-band antenna system, described in various embodiments of the present invention is a compact internal antenna system that can be embedded in a wireless communication device. In the embodiments shown, the antenna system may be built on a ground plane having a length no longer than 100 mm. The multi-band antenna system exhibits broadband capabilities that allow operation on several frequency bands, such as AMPS, GSM, GPS, DCS, PCS, 3G and Bluetooth. |
[0039] 本发明各个实施例中描述的多波段天线系统是可嵌入在无线通信设备内的紧凑的内部天线系统。在表示的实施例中，可在具有不超过100mm长度的地平面上建立该天线系统。该多波段天线系统展示了允许在7个频段上操作的宽带能力，例如AMPS、GSM、GPS、DCS、PCS、3G及蓝牙。 |
| [0040] In the foregoing specification, the invention and its benefits and advantages have been described with reference to specific embodiments. However, one of ordinary skill in the art appreciates that various modifications and changes can be made without departing from the scope of the present invention as set forth in the claims below. Accordingly, the specification and figures are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of present invention. The benefits, advantages, solutions to problems, and any element(s) that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential features or elements of any or all the claims. The invention is defined solely by the appended claims including any amendments made during the pendency of this application and all equivalents of those claims as issued. |
[0040] 在前述规范中，已经参考特定的实施例描述了本发明及其益处和优点。然而，本领域普通技术人员理解，可进行不超出以下权利要求所述的本发明范围的各种修改及改变。因而，该说明书和附图应例示性而非限制性的理解，并且所有这些修改都期望包括在本发明的范围之内。益处、优点、问题的解决方案，以及可引发任何益处、优点或解决方案发生或更加显著的的任何元素不构成任何或所有权利要求的关键的、必需的或本质的特征及元素。本发明通过所附的权利要求单独定义，其包括在本申请及提出的这些权利要求的等价物未决期间所进行的改进。 |
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