WO2018133426A1

WO2018133426A1 - Foldable dual-band antenna based on u-shaped slit structure

Info

Publication number: WO2018133426A1
Application number: PCT/CN2017/100175
Authority: WO
Inventors: 彭彪; 邓力; 李书芳; 张贯京; 葛新科; 高伟明; 张红治
Original assignee: 深圳市景程信息科技有限公司
Priority date: 2017-01-22
Filing date: 2017-09-01
Publication date: 2018-07-26
Also published as: CN206441850U

Abstract

Disclosed in the present utility model is a foldable dual-band antenna based on a U-shaped slit structure, comprising a foldable metal sheet and an SMA connector. The tail portion of the foldable metal sheet is inwardly folded once to form a tail portion metal sheet, the front portion of the foldable metal sheet is inwardly folded four times to sequentially form a bottom portion metal sheet, an outer side metal sheet, a top portion metal sheet, an inner side metal sheet, and an intermediate metal sheet. A ground terminal of the SMA connector is connected to the bottom portion metal sheet in a welded manner, the bottom portion metal sheet being provided with a hole; a feeder line of the SMA connector passes through the hole of the bottom portion metal sheet and is welded to the intermediate metal sheet to form a feed connection point. A U-shaped slit resonator is hollowed out on the intermediate metal sheet around the feed connection point, the effective electrical length of the U-shaped slit resonator in 2.4GHz band being one-half wavelength. The present utility model can achieve the dual-band function of the TVWS operating band of 470-790 MHz and Wi-Fi operating band of 2.4 GHz without the necessity of increasing the size of the existing foldable metal sheet antenna, enabling the miniaturization of the antenna.

Description

基于 u型缝隙结构的折叠式双频段天线技术领域 Folding dual-band antenna based on u-shaped slot structure

[0001] 本实用新型涉及射频微波通信技术领域，尤其涉及一种基于 U型缝隙结构的折叠式双频段天线。 [0001] The present invention relates to the field of radio frequency microwave communication technologies, and in particular, to a folded dual-band antenna based on a U-shaped slot structure.

背景技术 Background technique

[0002] TVWS电视白区 (Television White Space； TVWS)频段和 2.4GHz WiFi频段可以被应用于认知无线电等领域研究，由于 TVWS频段相对于 2.4GHz WiFi频段频率低很多（470-790MHZ) ，所以目前很少有天线能同吋覆盖这两个频段。在应对能同吋覆盖高低频率的天线设计问题吋，往往是通过采用组合多个天线的方法，但是这种设计方法不利于缩小天线尺寸。 [0002] The TVWS Television White Space (TVWS) band and the 2.4 GHz WiFi band can be applied to research in the field of cognitive radio, since the TVWS band is much lower than the 2.4 GHz WiFi band (470-790 MHz), so Few antennas can cover these two bands simultaneously. In response to the problem of antenna design that can cover high and low frequencies, it is often through the method of combining multiple antennas, but this design method is not conducive to reducing the antenna size.

技术问题 technical problem

[0003] 本实用新型的主要目的提供一种基于 U型缝隙结构的折叠式双频段天线，在不需要增加现有折叠式金属片天线尺寸的条件下，能够实现 470-790MHZ的 TVWS 工作频段和 2.4GHz的 WiFi工作频段的双频段功能，并且实现天线的小型化。问题的解决方案 [0003] The main object of the present invention is to provide a folded dual-band antenna based on a U-shaped slot structure, which can realize a TVWS working frequency band of 470-790 MHz without increasing the size of an existing folded metal piece antenna. The dual-band function of the 2.4GHz WiFi operating band and the miniaturization of the antenna. Problem solution

技术解决方案 Technical solution

[0004] 为实现上述目的，本实用新型提供了一种基于 U型缝隙结构的折叠式双频段天线，包括折叠金属片和 SMA接头，所述折叠金属片的尾部从内侧折叠一次形成尾部金属片，所述折叠金属片的前部从内侧折叠四次依次形成底部金属片、外侧金属片、顶部金属片、内侧金属片和中间金属片，所述顶部金属片、中间金属片与底部金属片互相平行设置，所述外侧金属片、内侧金属片与尾部金属片互相平行设置，其中： [0004] In order to achieve the above object, the present invention provides a folded dual-band antenna based on a U-shaped slot structure, including a folded metal piece and an SMA joint, and the tail portion of the folded metal piece is folded once from the inside to form a tail metal piece. The front portion of the folded metal sheet is folded four times from the inner side to form a bottom metal piece, an outer metal piece, a top metal piece, an inner metal piece and an intermediate metal piece, and the top metal piece, the middle metal piece and the bottom metal piece are mutually Parallelly disposed, the outer metal piece, the inner metal piece and the tail metal piece are arranged in parallel with each other, wherein:

[0005] 所述 SMA接头的地端与所述底部金属片焊接相连，所述底部金属片上幵设有孔洞； [0005] The ground end of the SMA joint is welded to the bottom metal piece, and the bottom metal piece is provided with a hole;

[0006] 所述 SMA接头的馈线穿过所述底部金属片的孔洞并与所述中间金属片焊接形成馈电连接点； [0007] 所述馈电连接点在中间金属片上的位置处于所述孔洞在底部金属片上的位置的正上方； [0006] a feed line of the SMA joint passes through a hole of the bottom metal piece and is welded to the intermediate metal piece to form a feed connection point; [0007] the position of the feed connection point on the intermediate metal piece is directly above the position of the hole on the bottom metal piece;

[0008] 所述馈电连接点的周围且在所述中间金属片上挖空一个 U型缝隙谐振器，所述 U型缝隙谐振器在 2.4GHz频段吋的有效电长度为二分之一波长。 [0008] a U-shaped slot resonator is hollowed out around the feed connection point and on the intermediate metal piece, and the effective electrical length of the U-shaped slot resonator in the 2.4 GHz band is one-half wavelength.

[0009] 优选的，所述 U型缝隙谐振器的缝隙内径 W ^Mmm, 缝隙长度 !^ ₃为34！^^ 缝隙宽度 L ₄ 15mm。 [0009] Preferably, the U-shaped slot resonator has a slit inner diameter W ^Mmm, and a slit length !^ ₃ is 34! ^^ The gap width is L ₄ 15mm.

[0010] 优选的，所述 U型缝隙谐振器的 U型幵口端与中间金属片的宽边之间的距离 d , 为 2mm，该 U型缝隙谐振器的 U型封闭端与馈电连接点之间的距离 d ₂ 5.35mm。 [0010] Preferably, the distance d between the U-shaped slot end of the U-shaped slot resonator and the wide side of the intermediate metal piece is 2 mm, and the U-shaped closed end of the U-shaped slot resonator is connected to the feed. The distance between the points is d ₂ 5.35 mm.

[0011] 优选的，所述折叠金属片为金属铜片，宽度 W。为 60mm，厚度为 0.2mm。 [0011] Preferably, the folded metal piece is a metal copper piece with a width W. It is 60mm and has a thickness of 0.2mm.

[0012] 优选的，所述尾部金属片的长度 H。为 61mm。 [0012] Preferably, the length of the tail metal piece is H. It is 61mm.

[0013] 优选的，所述底部金属片长度 L。为 150mm。 [0013] Preferably, the bottom metal piece has a length L. It is 150mm.

[0014] 优选的，所述外侧金属片、顶部金属片、内侧金属片和中间金属片的长度依次为 H o=6 lmm, L !=65mm, H !=45mm, L ₂=49mm。 [0014] Preferably, the outer metal piece, the top metal piece, the inner metal piece and the intermediate metal piece have a length of H o=6 lmm, L !=65 mm, H !=45 mm, L ₂ =49 mm.

[0015] 优选的，所述孔洞与底部金属片的宽边之间的横向距离 d。=45.45，该孔洞与底部金属片的长边之间的纵向距离为 W。/2=30mm。 [0015] Preferably, the lateral distance d between the hole and the wide side of the bottom metal piece. =45.45, the longitudinal distance between the hole and the long side of the bottom metal piece is W. /2=30mm.

发明的有益效果 Advantageous effects of the invention

有益效果 Beneficial effect

[0016] 相较于现有技术，本实用新型所述基于 U型缝隙结构的折叠式双频段天线实现了低频率（470-790MHZ) 宽带工作频段，能够覆盖 470-790MHz的 TVWS工作频段。此外，本实用新型通过优化天线的馈电结构，在作为馈电平面的中间金属片上挖空一个缝隙谐振器，在不增加天线尺寸的条件下获得了一个高频率匹配，实现 2.4GHz频段的 WiFi工作频段。本实用新型所述折叠式双频段宽带天线相比于通过组合多个天线方式设计的双频天线，在不需要增加天线尺寸的条件下，能够实现 470-790MHZ频段的 TVWS工作频段和 2.4GHz频段的 WiFi工作频段，有效减小了天线尺寸，实现了天线的小型化。 Compared with the prior art, the folded dual-band antenna based on the U-shaped slot structure of the present invention realizes a low frequency (470-790 MHz) wide operating frequency band and can cover a TVWS working frequency band of 470-790 MHz. In addition, the utility model optimizes the feeding structure of the antenna, hollows out a slot resonator on the intermediate metal piece as the feeding plane, obtains a high frequency matching without increasing the size of the antenna, and realizes WiFi in the 2.4 GHz band. Working frequency. Compared with the dual-band antenna designed by combining multiple antennas, the folded dual-band wideband antenna of the present invention can realize the TVWS working frequency band and the 2.4 GHz frequency band of the 470-790 MHz band without increasing the antenna size. The WiFi working frequency band effectively reduces the size of the antenna and realizes miniaturization of the antenna.

对附图的简要说明 Brief description of the drawing

附图说明 DRAWINGS

[0017] 图 1是本实用新型基于 U型缝隙结构的折叠式双频段天线优选实施例的立体结构示意图； 1 is a three-dimensional structure of a preferred embodiment of a folded dual-band antenna based on a U-shaped slot structure according to the present invention; Schematic diagram

[0018] 图 2是本实用新型基于 U型缝隙结构的折 3 式双频段天线的侧视图； 2 is a side view of a folded-type dual-band antenna based on a U-shaped slot structure of the present invention; [0018] FIG.

[0019] 图 3是本实用新型基于 U型缝隙结构的折 3 式双频段天线的中间金属片的俯视图 3 is a top view of an intermediate metal piece of a folded-type dual-band antenna based on a U-shaped slot structure according to the present invention;

[0020] 图 4是本实用新型基于 U型缝隙结构的折叠式双频段天线的反射系数8„的仿真结果示意图； 4 is a schematic diagram showing simulation results of a reflection coefficient of a folded dual-band antenna based on a U-shaped slot structure according to the present invention;

[0021] 图 5是本实用新型基于 U型缝隙结构的折叠式双频段天线的中间金属片的长度对天线的反射系数 S„的影响示意图； [0021] FIG. 5 is a schematic diagram showing the influence of the length of the intermediate metal piece of the folded dual-band antenna based on the U-shaped slot structure on the reflection coefficient S„ of the antenna;

[0022] 图 6是本实用新型基于 U型缝隙结构的折叠式双频段天线的缝隙谐振器的缝隙长度对天线的反射系数 S„的影响示意图； 6 is a schematic diagram showing the influence of the slit length of the slot resonator of the folded dual-band antenna based on the U-shaped slot structure on the reflection coefficient S„ of the antenna;

[0023] 图 7a、 7b和 7c分别为本实用新型基于 U型缝隙结构的折叠式双频段天线在 0.51G Hz、 0.73GHz和 2.49GHz三个频率的仿真方向图。 7a, 7b, and 7c are simulation directions of the folded dual-band antenna based on the U-shaped slot structure at three frequencies of 0.51 G Hz, 0.73 GHz, and 2.49 GHz, respectively.

[0024] 本实用新型目的实现、功能特点及优点将结合实施例，将在具体实施方式部分一并参照附图做进一步说明。 [0024] The objects, features, and advantages of the present invention will be described in conjunction with the embodiments.

实施该发明的最佳实施例 BEST MODE FOR CARRYING OUT THE INVENTION

本发明的最佳实施方式 BEST MODE FOR CARRYING OUT THE INVENTION

[0025] 为更进一步阐述本实用新型为达成上述目的所采取的技术手段及功效，以下结合附图及较佳实施例，对本实用新型的具体实施方式、结构、特征及其功效进行详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本实用新型，并不用于限定本实用新型。 The specific embodiments, structures, features and functions of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0026] 参照图 1、图 2和图 3所示，图 1是本实用新型基于 U型缝隙结构的折叠式双频段天线优选实施例的立体结构示意图；图 2是本实用新型基于 U型缝隙结构的折叠式双频段天线的侧视图；图 3是本实用新型基于 U型缝隙结构的折叠式双频段天线的中间金属片的俯视图。在本实施例中，所述基于 U型缝隙结构的折叠式双频段天线包括折叠金属片 1和 SMA接头 2，该折叠金属片 1的尾部从内侧折叠一次形成尾部金属片 11，折叠金属片 1的前部从内侧折叠四次依次形成底部金属片 12、外侧金属片 13、顶部金属片 14、内侧金属片 15和中间金属片 16。所述叠金属片 1 的每一次折叠方式可以采用任意角度弯折，例如 30°、 45°、 60°以及 90°等角度，为了简化描述，本实施例两个金属片之间采用 90°角度的垂直折叠方式。所述尾部金属片 11与底部金属片 12相互垂直折叠连接，底部金属片 12与外侧金属片 13 相互垂直折叠连接，外侧金属片 13与顶部金属片 14相互垂直折叠连接、顶部金属片 14与内侧金属片 15相互垂直折叠连接，内侧金属片 15与中间金属片 16相互垂直折叠连接。所述顶部金属片 14、中间金属片 16与底部金属片 12互相平行设置，所述外侧金属片 13、内侧金属片 15与尾部金属片 11互相平行设置。 1 is a schematic perspective view of a preferred embodiment of a folded dual-band antenna based on a U-shaped slot structure according to the present invention; FIG. 2 is a U-shaped slot according to the present invention. Side view of a folded double-band antenna of the structure; FIG. 3 is a plan view of the intermediate metal piece of the folded dual-band antenna based on the U-shaped slot structure of the present invention. In this embodiment, the folded dual-band antenna based on the U-shaped slot structure includes a folded metal piece 1 and an SMA joint 2, and the tail portion of the folded metal piece 1 is folded once from the inside to form the tail metal piece 11, and the folded metal piece 1 is folded. The front portion is folded four times from the inside to form the bottom metal piece 12, the outer metal piece 13, the top metal piece 14, the inner metal piece 15, and the intermediate metal piece 16. Each folding manner of the laminated metal sheet 1 can be bent at any angle, for example, angles of 30°, 45°, 60°, and 90°. In order to simplify the description, the two metal sheets of this embodiment adopt a vertical folding manner of 90° angle. The tail metal piece 11 and the bottom metal piece 12 are vertically folded and connected to each other, and the bottom metal piece 12 and the outer metal piece 13 are vertically folded and connected to each other, and the outer metal piece 13 and the top metal piece 14 are vertically folded and connected to each other, and the top metal piece 14 and the inner side are respectively The metal sheets 15 are vertically folded and connected to each other, and the inner metal sheets 15 and the intermediate metal sheets 16 are vertically folded and connected to each other. The top metal piece 14, the intermediate metal piece 16 and the bottom metal piece 12 are disposed in parallel with each other, and the outer metal piece 13, the inner metal piece 15, and the tail metal piece 11 are disposed in parallel with each other.

[0027] 所述折叠金属片 1的尾部往内侧折叠一次形成尾部金属片 11，长度 H0为 61mm ；所述底部金属片 12为所述基于 U型缝隙结构的折叠式双频段天线的底部，长度 L o [0027] The tail portion of the folded metal sheet 1 is folded once to form the tail metal piece 11 with a length H0 of 61 mm; the bottom metal piece 12 is the bottom of the folded double-band antenna based on the U-shaped slit structure, the length L o

为 150mm; 所述外侧金属片 13、顶部金属片 14、内侧金属片 15和中间金属片 16 的各部分长度依次为 H。=61mm， L

每一个金属片的宽度均为折叠金属片 1的宽度 W。=60mm，所述折叠金属片 1为金属铜片，厚度为 0.2 mm。 The length of each of the outer metal piece 13, the top metal piece 14, the inner metal piece 15, and the intermediate metal piece 16 is H in this order. =61mm, L

The width of each metal piece is the width W of the folded metal piece 1. = 60 mm, the folded metal piece 1 is a metal copper piece having a thickness of 0.2 mm.

[0028] 参考图 2所示，所述 SMA接头 2为一种常见的天线接口， SMA是 Sub-Miniature-A 的简称。在本实施例中，所述 SMA接头 2包括地端 21以及馈线 22，所述 SMA接头 2的地端 21与底部金属片 12的底部焊接相连。底部金属片 12上幵设有孔洞 120，该孔洞 120的大小与 SMA接头 2的馈线 22粗细相匹配。所述孔洞 120与底部金属片 12宽边 W。之间的横向距离 d ₀=45.45 , 该孔洞 120与底部金属片 12的长边 L。之间的纵向距离为 W。/2=30mm。 SMA接头 2的馈线 22穿过底部金属片 12的孔洞 120并与中间金属片 16焊接连接，使得所述 SMA接头 2的馈线 22与中间金属片 16的焊接连接处形成馈电连接点 20，从而实现馈电。在本实施例中，由于所述底部金属片 12与中间金属片 16互相平行，因此所述馈电连接点 20在中间金属片 16上的位置处于所述孔洞 120在底部金属片 12的位置的正上方。 [0028] Referring to FIG. 2, the SMA connector 2 is a common antenna interface, and SMA is an abbreviation of Sub-Miniature-A. In the present embodiment, the SMA connector 2 includes a ground end 21 and a feed line 22, and the ground end 21 of the SMA joint 2 is welded to the bottom of the bottom metal piece 12. A hole 120 is formed in the bottom metal piece 12, and the size of the hole 120 matches the thickness of the feed line 22 of the SMA connector 2. The hole 120 has a wide side W with the bottom metal piece 12. The lateral distance d ₀ = 45.45, the hole 120 and the long side L of the bottom metal piece 12. The longitudinal distance between them is W. /2=30mm. The feed line 22 of the SMA connector 2 passes through the hole 120 of the bottom metal piece 12 and is soldered to the intermediate metal piece 16 such that the solder joint of the feed line 22 of the SMA joint 2 and the intermediate metal piece 16 forms a feed connection point 20, thereby Implement the feed. In this embodiment, since the bottom metal piece 12 and the intermediate metal piece 16 are parallel to each other, the position of the feed connection point 20 on the intermediate metal piece 16 is at the position of the hole 120 at the bottom metal piece 12. Directly above.

[0029] 参考图 3所示，所述馈电连接点 20的周围且在所述中间金属片 16上幵设一个挖空的 U型缝隙谐振器 10。所述 U型缝隙谐振器 10在 2.4GHz频段（2.4-2.483GHz) 吋的有效电长度为二分之一波长，可以产生 2.4GHz频段的 WiFi工作频段。在本实施例中，所述 U型缝隙谐振器 10为一种带有 U型缝隙结构的谐振器，如图 3中的白色部分。该 U型缝隙谐振器 10的缝隙内径 \¥ ,为2.2！^^ 缝隙长度 1^为341！^，缝隙宽度 ₄ [0029] Referring to FIG. 3, a hollowed out U-shaped slot resonator 10 is disposed around the feed connection point 20 and on the intermediate metal piece 16. The U-shaped slot resonator 10 has an effective electrical length of one-half wavelength in the 2.4 GHz band (2.4-2.483 GHz), and can generate a WiFi operating band in the 2.4 GHz band. In the present embodiment, the U-shaped slot resonator 10 is a resonator having a U-shaped slot structure, such as the white portion in FIG. The inner diameter of the slot of the U-shaped slot resonator 10 is \¥, which is 2.2! ^^ The gap length 1^ is 341! ^, Gap width ₄

为 15mm。该 U型缝隙谐振器 10的 U型幵口端与中间金属片 16的宽边 W。之间的距离 d！为？!!^!，该 U型缝隙谐振器 10的 U型封闭端与馈电连接点 20之间的距离 d ₂ 为 5.35mm。中间金属片 16作为馈电平面，本实用新型由于在中间金属片 16上幵设有 U型缝隙谐振器 10，在不增加天线尺寸的条件下获得了一个高频率匹配，从而使得本实用新型折叠式双频段天线能够覆盖 2.4GHz的 WiFi工作频段。 It is 15mm. The U-shaped slit end of the U-shaped slot resonator 10 and the wide side W of the intermediate metal piece 16. The distance between d! for? !!^!, the distance d ₂ between the U-shaped closed end of the U-shaped slot resonator 10 and the feed connection point 20 is 5.35 mm. The intermediate metal piece 16 serves as a feeding plane. Since the utility model has a U-shaped slot resonator 10 disposed on the intermediate metal piece 16, a high frequency matching is obtained without increasing the size of the antenna, thereby folding the utility model. The dual-band antenna can cover the 2.4GHz WiFi operating band.

[0030] 本实用新型所述基于 U型缝隙结构的折叠式双频段天线实现了低频率宽带（470 -790MHz) 的工作频段，因此能够覆盖 470-790MHZ的 TVWS工作频段。此外，通过优化天线的馈电结构，在作为馈电平面的中间金属片 16上挖空一个 U型缝隙谐振器 10，在不增加天线尺寸的条件下获得了一个高频率匹配，实现 2.4GHz的 WiFi工作频段。本实用新型所述基于 U型缝隙结构的折叠式双频段天线相比于通过组合多个天线方式设计的双频天线，可以有效减小天线尺寸，在不需要增加天线尺寸的条件下，能够获得 470-790MHZ的 TVWS工作频段和 2.4GHz的 WiFi工作频段的双频段功能，并且实现了天线的小型化。 [0030] The folded dual-band antenna based on the U-shaped slot structure of the present invention realizes a low frequency broadband (470-790 MHz) operating frequency band, and thus can cover a TVWS operating frequency band of 470-790 MHz. In addition, by optimizing the feed structure of the antenna, a U-shaped slot resonator 10 is hollowed out on the intermediate metal piece 16 as a feed plane, and a high frequency matching is obtained without increasing the size of the antenna, achieving 2.4 GHz. WiFi working frequency band. Compared with the dual-band antenna designed by combining multiple antennas, the folded dual-band antenna based on the U-shaped slot structure of the present invention can effectively reduce the antenna size, and can be obtained without increasing the size of the antenna. The 470-790MHZ TVWS operating band and the 2.4GHz WiFi operating band have dual-band functions, and the antenna is miniaturized.

[0031] 参考图 4所示，图 4是本实用新型基于 U型缝隙结构的折叠式双频段天线的反射系数 S„的仿真结果示意图。从图 4可以看出，本实用新型基于 U型缝隙结构的折叠式双频段天线有三个谐振频率模式： f _ml、 f _m2和 f _m3。其中， f _ml和 f _m2与天线的总体尺寸有关， f _m3是由 U型缝隙谐振器 10产生。实用新型所述天线的工作频率覆盖 TVWS频段（470-790MHZ) 和 2.4GHz频段 WiFi (2.4-2.483GHz) 。在本实施例中， f _ml为天线的最低工作频率，该频率 f _ml可以通过改变天线的设计高度 H。来调节； f _m2可以通过改变中间金属片 16 (天线的最后一个折叠金属片）的设计长度 L ₂来调节； f _m3可以通过改变缝隙谐振器 10的设计缝隙长度 L ₃来调节。 [0031] Referring to FIG. 4, FIG. 4 is a schematic diagram showing simulation results of a reflection coefficient S„ of a folded dual-band antenna based on a U-shaped slot structure according to the present invention. As can be seen from FIG. 4, the utility model is based on a U-shaped slot. The structure of the folded dual-band antenna has three resonant frequency modes: f _ml , f _m2 and f _{m3 ,} where f _ml and f _{m2 are} related to the overall size of the antenna, and f _m3 is generated by the U-shaped slot resonator 10. The operating frequency of the antenna covers the TVWS band (470-790MHZ) and the 2.4GHz band WiFi (2.4-2.483GHz). In this embodiment, f _ml is the lowest operating frequency of the antenna, and the frequency f _ml can be changed by changing the antenna. The design height H is adjusted; f _m2 can be adjusted by changing the design length L _{2 of the} intermediate metal piece 16 (the last folded metal piece of the antenna); f _m3 can be adjusted by changing the design gap length L _{3 of the} slot resonator 10 .

[0032] 参考图 5所示，图 5是本实用新型基于 U型缝隙结构的折叠式双频段天线的中间金属片 16的长度 L ₂对天线的反射系数 S„ 影响示意图。从图 5可以看出，当中间金属片 16的设计长度 L ₂¾长吋， f _m2的频率降低，而 f _ml、 _{f m3}保持不变。 [0032] Referring to FIG. 5, FIG. 5 is a schematic diagram showing the influence of the length L ₂ of the intermediate metal piece 16 of the folded dual-band antenna based on the U-shaped slot structure on the reflection coefficient S „ of the antenna. When the design length L ₂ 3⁄4 of the intermediate metal piece 16 is long, the frequency of f _m2 is lowered, and f _ml and _{f m3} remain unchanged.

[0033] 参考图 6所示，图 6是本实用新型基于 U型缝隙结构的折叠式双频段天线的 U型缝隙谐振器 10的缝隙长度 L ₃对天线的反射系数 S„的影响示意图。从图 6可以看出，当设计缝隙长度！^缩短吋， f _m3的频率增大，而 f _ml、 f _m2保持不变。 [0034] 参考图 7a、 7b和 7c所示，图 7a、 7b和 7c分别为本实用新型基于 U型缝隙结构的折叠式双频段天线在 0.51GHz、 0.73GHz和 2.49GHz三个频率的仿真方向图。在本实施例中，本实用新型所述基于 U型缝隙结构的折叠式双频段天线在三个频率的仿真增益值分别为 2.3dBi、 2.9dBi以及 4.8dBi。从图 7a和 7b中可以看出，在频段 0. 51GHz和 0.73GHz日寸，天线朝上方辐射，即本实用新型所述基于 U型缝隙结构的折叠式双频段天线在第一工作频段（470-790MHZ的 TVWS工作频段）内朝上方辐射；从图 7c中可以看出，在 2.49GHz日寸，天线朝着 0-90°方向辐射，即本实用新型所述基于 U型缝隙结构的折叠式双频段天线在第二工作频段（2.4GHz的 WiFi工作频段）内朝天线的前端和尾部的折叠金属片部分之间辐射，并且具有相对较高的增益特性，该特性有助于电磁信号的定向传输，因此适用于室内私人 WiFi ***。 Referring to FIG. 6, FIG. 6 is a schematic diagram showing the influence of the slot length L ₃ of the U-shaped slot resonator 10 of the folded dual-band antenna based on the U-shaped slot structure on the reflection coefficient S „ of the antenna. As can be seen from Fig. 6, when the design gap length is shortened, the frequency of f _m3 increases, and f _ml and f _m2 remain unchanged. Referring to FIGS. 7a, 7b, and 7c, FIGS. 7a, 7b, and 7c are simulation directions of the folded dual-band antenna based on the U-shaped slot structure at three frequencies of 0.51 GHz, 0.73 GHz, and 2.49 GHz, respectively. Figure. In this embodiment, the simulation gain values of the folded dual-band antenna based on the U-shaped slot structure at three frequencies are 2.3dBi, 2.9dBi, and 4.8dBi, respectively. As can be seen from Figures 7a and 7b, in the frequency bands of 0. 51 GHz and 0.73 GHz, the antenna radiates upward, that is, the folded dual-band antenna based on the U-shaped slot structure of the present invention is in the first working frequency band (470). - 790MHZ TVWS working frequency band) radiates internally upwards; as can be seen from Fig. 7c, at 2.49 GHz, the antenna radiates toward 0-90°, that is, the U-shaped slot structure based folding type according to the present invention The dual-band antenna radiates between the front end of the antenna and the folded sheet metal portion of the tail in the second operating band (2.4 GHz WiFi operating band) and has a relatively high gain characteristic that contributes to the orientation of the electromagnetic signal. Transmission, therefore suitable for indoor private WiFi systems.

[0035] 本实用新型所述基于 U型缝隙结构的折叠式双频段天线不仅加工简单成本低廉，而且可以产生三个基本谐振模式，因此被广泛应用于宽带和多频段射频微波通信中。由于 U型缝隙谐振器是在馈电平面上幵槽获得，因此不需要增加额外谐振体，具有缩小本实用新型所述基于 u型缝隙结构的折叠式双频段天线尺寸的功能。 [0035] The folded dual-band antenna based on the U-shaped slot structure of the present invention is not only simple to process, low in cost, but also can generate three basic resonance modes, and thus is widely used in broadband and multi-band RF microwave communication. Since the U-shaped slot resonator is obtained on the feed level surface, there is no need to add an additional resonator body, and the function of reducing the size of the folded dual-band antenna based on the u-type slot structure of the present invention is obtained.

[0036] 以上仅为本实用新型的优选实施例，并非因此限制本实用新型的专利范围，凡是利用本实用新型说明书及附图内容所作的等效结构或等效功能变换，或直接或间接运用在其他相关的技术领域，均同理包括在本实用新型的专利保护范围内。 The above is only a preferred embodiment of the present invention, and thus does not limit the scope of the patent of the present invention, and the equivalent structure or equivalent function transformation made by the specification and the drawings of the present invention, or directly or indirectly In other related technical fields, the same is included in the scope of patent protection of the present invention.

工业实用性 Industrial applicability

[0037] 相较于现有技术，本实用新型所述基于 U型缝隙结构的折叠式双频段天线实现了低频率（470-790MHZ) 宽带工作频段，能够覆盖 470-790MHz的 TVWS工作频段。此外，本实用新型通过优化天线的馈电结构，在作为馈电平面的中间金属片上挖空一个缝隙谐振器，在不增加天线尺寸的条件下获得了一个高频率匹配，实现 2.4GHz频段的 WiFi工作频段。本实用新型所述折叠式双频段宽带天线相比于通过组合多个天线方式设计的双频天线，在不需要增加天线尺寸的条件下，能够实现 470-790MHZ频段的 TVWS工作频段和 2.4GHz频段的 WiFi工作频段，有效减小了天线尺寸，实现了天线的小型化。 Compared with the prior art, the folded dual-band antenna based on the U-shaped slot structure of the present invention realizes a low frequency (470-790 MHz) wide working frequency band, and can cover the TVWS working frequency band of 470-790 MHz. In addition, the utility model optimizes the feeding structure of the antenna, hollows out a slot resonator on the intermediate metal piece as the feeding plane, obtains a high frequency matching without increasing the size of the antenna, and realizes WiFi in the 2.4 GHz band. Working frequency. Compared with the dual-band antenna designed by combining multiple antennas, the folded dual-band wideband antenna of the present invention can realize the TVWS working frequency band and the 2.4 GHz frequency band of the 470-790 MHz band without increasing the antenna size. WiFi working frequency band, The antenna size is effectively reduced, and the antenna is miniaturized.

Claims

权利要求书 Claim

[权利要求 1] 一种基于 U型缝隙结构的折叠式双频段天线，包括折叠金属片和 SMA 接头，其特征在于，所述折叠金属片的尾部从内侧折叠一次形成尾部金属片，所述折叠金属片的前部从内侧折叠四次依次形成底部金属片、外侧金属片、顶部金属片、内侧金属片和中间金属片，所述顶部金属片、中间金属片与底部金属片互相平行设置，所述外侧金属片、内侧金属片与尾部金属片互相平行设置，其中：所述 SMA接头的地端与所述底部金属片焊接相连，所述底部金属片上幵设有孔洞；所述 S MA接头的馈线穿过所述底部金属片的孔洞并与所述中间金属片焊接形成馈电连接点；所述馈电连接点在中间金属片上的位置处于所述孔洞在底部金属片上的位置的正上方；所述馈电连接点的周围且在所述中间金属片上挖空一个 U型缝隙谐振器，所述 U型缝隙谐振器在 2.4G Hz频段吋的有效电长度为二分之一波长。 [Claim 1] A folded dual-band antenna based on a U-shaped slot structure, comprising a folded metal piece and an SMA joint, wherein a tail portion of the folded metal piece is folded once from the inside to form a tail metal piece, the folding The front portion of the metal piece is folded four times from the inner side to form a bottom metal piece, an outer metal piece, a top metal piece, an inner metal piece and an intermediate metal piece, and the top metal piece, the intermediate metal piece and the bottom metal piece are arranged in parallel with each other. The outer metal piece, the inner metal piece and the tail metal piece are arranged in parallel with each other, wherein: the ground end of the SMA joint is welded to the bottom metal piece, and the bottom metal piece is provided with a hole; the S MA joint Feeding the wire through the hole of the bottom metal piece and welding with the intermediate metal piece to form a feeding connection point; the position of the feeding connection point on the intermediate metal piece is directly above the position of the hole on the bottom metal piece; Hollowing a U-shaped slot resonator around the feed connection point and on the intermediate metal piece, the U-shaped slit In the effective electrical length of the resonator 2.4G Hz frequency inch to one-half wavelength.

[权利要求 2] 如权利要求 1所述的基于 U型缝隙结构的折叠式双频段天线，其特征在于，所述 U型缝隙谐振器的缝隙内径 \¥ ,为2.2！^^ 缝隙长度1^ ₃ 为 34mm，缝隙宽度 1^ ₄为151^^ [Claim 2] The folded dual-band antenna based on the U-shaped slot structure according to claim 1, wherein the slot inner diameter of the U-shaped slot resonator is \¥, which is 2.2! ^^ The slot length 1^ ₃ is 34mm, and the slot width 1^ ₄ is 151^^

[权利要求 3] 如权利要求 2所述的基于 U型缝隙结构的折叠式双频段天线，其特征在于，所述 U型缝隙谐振器的 U型幵口端与中间金属片的宽边之间的距离 d ,为2！^^ 该 U型缝隙谐振器的 U型封闭端与馈电连接点之间的距离 d ₂为 5.35mm。 [Claim 3] The U-shaped slot structure-based folded dual-band antenna according to claim 2, wherein a U-shaped slot end of the U-shaped slot resonator is between the wide side of the intermediate metal piece The distance d is 2! ^^ The distance d ₂ between the U-shaped closed end of the U-shaped slot resonator and the feed connection point is 5.35 mm.

[权利要求 4] 如权利要求 1至 3任一项所述的基于 U型缝隙结构的折叠式双频段天线 [Claim 4] A folded dual-band antenna based on a U-shaped slot structure according to any one of claims 1 to 3.

，其特征在于，所述折叠金属片为金属铜片，宽度 W。为 60mm，厚度为 0.2mmo The folded metal piece is a metal copper piece having a width W. 60mm, thickness 0.2mmo

[权利要求 5] 如权利要求 4所述的基于 U型缝隙结构的折叠式双频段天线，其特征在于，所述尾部金属片的长度 H。为 61mm。 [Claim 5] The folded dual-band antenna based on a U-shaped slot structure according to claim 4, wherein the length of the tail metal piece is H. It is 61mm.

[权利要求 6] 如权利要求 4所述的基于 U型缝隙结构的折叠式双频段天线，其特征在于，所述底部金属片长度 L。为 150mm。 [Claim 6] The U-shaped slot structure-based folded dual-band antenna according to claim 4, wherein the bottom metal piece has a length L. It is 150mm.

[权利要求 7] 如权利要求 4所述的基于 U型缝隙结构的折叠式双频段天线，其特征在于，所述外侧金属片、顶部金属片、内侧金属片和中间金属片的长度依次为 H ₀=61mm， L

L ₂=49mm。 [Claim 7] The U-shaped slot structure-based folded dual-band antenna according to claim 4, characterized in that The length of the outer metal piece, the top metal piece, the inner metal piece and the intermediate metal piece are H ₀ =61 mm, L

L ₂ = 49 mm.

[权利要求 8] 如权利要求 4所述的基于 U型缝隙结构的折叠式双频段天线，其特征在于，所述孔洞与底部金属片的宽边之间的横向距离 d。=45.45，该孔洞与底部金属片的长边之间的纵向距离为 W o/2=30mm。 [Claim 8] The U-shaped slot structure-based folded dual-band antenna according to claim 4, wherein a lateral distance d between the hole and a wide side of the bottom metal piece is obtained. =45.45, the longitudinal distance between the hole and the long side of the bottom metal piece is W o/2=30mm.