TW202036986A - Dual-band antenna - Google Patents

Dual-band antenna Download PDF

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Publication number
TW202036986A
TW202036986A TW108118288A TW108118288A TW202036986A TW 202036986 A TW202036986 A TW 202036986A TW 108118288 A TW108118288 A TW 108118288A TW 108118288 A TW108118288 A TW 108118288A TW 202036986 A TW202036986 A TW 202036986A
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TW
Taiwan
Prior art keywords
radiator
antenna
dual
electrically connected
band antenna
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TW108118288A
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Chinese (zh)
Inventor
陳彥佑
高明煜
陳柏樺
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國巨股份有限公司
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Publication of TW202036986A publication Critical patent/TW202036986A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/10—Resonant antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground

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  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

A dual-band antenna is provided. The dual-band antenna includes a first antenna portion, a second antenna portion and a grounded portion. The first antenna portion includes a signal feeding portion, first radiation bodies and a second radiation body. The signal feeding portion is electrically connected to a signal feeding point to receive an antenna signal. The first radiation bodies form an antenna device, for example a planar inverted-F antenna (PIFA). A terminal of the antenna device is electrically connected to the signal feeding portion, and another terminal of the antenna device is electrically connected to the grounded portion. The second radiation body and the antenna device are respectively disposed on opposite sides of the signal feeding portion. The second antenna portion includes a third radiation body and a fourth radiation body. The second radiation body and the third radiation body constitute a capacitively driven feed structure. A terminal of the fourth radiation body is electrically connected to the capacitively driven feed structure, and another terminal of the fourth radiation body is electrically connected to the grounded portion.

Description

雙頻段天線 Dual band antenna

本發明是有關於一種雙頻段天線，且特別是有關於一種具有小體積之雙頻段天線。 The present invention relates to a dual-band antenna, and particularly relates to a dual-band antenna with a small volume.

隨著通訊科技的快速發展，各種通訊產品，例如無線接入點(Wireless Access Point)、智慧型手機和筆記型電腦也逐漸成為人類生活的一部分。這些通訊產品大多具有天線裝置來實現無線傳輸的功能，以滿足消費者的需求。然而，隨著通訊產品的功能越來越多，體積越來越小，小型化，天線裝置不但需要提供多個頻段，也需要具有較小的體積。 With the rapid development of communication technology, various communication products, such as wireless access points (Wireless Access Points), smart phones and notebook computers have gradually become part of human life. Most of these communication products have an antenna device to realize the function of wireless transmission to meet the needs of consumers. However, as communication products have more and more functions, smaller and smaller sizes, antenna devices not only need to provide multiple frequency bands, but also need to have a smaller size.

本發明之實施例提供一種雙頻段天線，其可提供兩個頻段，且具有較小的體積。此雙頻段天線包含第一天線部、第二天線部以及接地部。訊號饋入部係電性連接至訊號饋入點，以接收天線訊號。第一輻射體係組成天線裝置。此天線裝置之一端係電性連接至訊號饋入部，而另一端電性連接至接地部。第二輻射體係電性連接至訊號饋入部，其中 第二輻射體與天線裝置設置於訊號饋入部之相對兩側。第二天線部包含第三輻射體以及第四輻射體。第二輻射體係電性連接至訊號饋入部。第二輻射體與第三輻射體組成電容性饋入結構，且第二輻射體與第三輻射體之間具有間隙。第四輻射體之一端係電性連接至第三輻射體，而另一端係電性連接至接地部。 The embodiment of the present invention provides a dual-band antenna which can provide two frequency bands and has a small volume. The dual-band antenna includes a first antenna part, a second antenna part and a ground part. The signal feeding part is electrically connected to the signal feeding point to receive the antenna signal. The first radiation system constitutes the antenna device. One end of the antenna device is electrically connected to the signal feeding part, and the other end is electrically connected to the ground part. The second radiation system is electrically connected to the signal feeding part, wherein The second radiator and the antenna device are arranged on opposite sides of the signal feeding part. The second antenna part includes a third radiator and a fourth radiator. The second radiation system is electrically connected to the signal feeding part. The second radiator and the third radiator form a capacitive feeding structure, and there is a gap between the second radiator and the third radiator. One end of the fourth radiator is electrically connected to the third radiator, and the other end is electrically connected to the ground portion.

在一些實施例中，天線裝置為平面倒F型天線(Planar inverted-F antenna；PIFA)。 In some embodiments, the antenna device is a Planar inverted-F antenna (PIFA).

在一些實施例中，上述平面倒F型天線包含U型結構和連接體。U型結構之一端係電性連接至訊號饋入部。連接體係電性連接於U型結構之另一端與接地部之間。 In some embodiments, the above-mentioned planar inverted F antenna includes a U-shaped structure and a connector. One end of the U-shaped structure is electrically connected to the signal feeding part. The connection system is electrically connected between the other end of the U-shaped structure and the ground.

在一些實施例中，上述之U型結構具有開口，此開口係朝向訊號饋入部。 In some embodiments, the U-shaped structure described above has an opening, and the opening faces the signal feeding portion.

在一些實施例中，第二輻射體具有第一延伸部，第三輻射體具有第二延伸部。第一延伸部係朝向第三輻射體延伸，第二延伸部係朝向第二輻射體延伸。 In some embodiments, the second radiator has a first extension, and the third radiator has a second extension. The first extension portion extends toward the third radiator, and the second extension portion extends toward the second radiator.

在一些實施例中，第一延伸部係平行於第二延伸部。 In some embodiments, the first extension is parallel to the second extension.

在一些實施例中，上述之雙頻段天線更包含電感，其係電性連接於第四輻射體與接地部之間。 In some embodiments, the above-mentioned dual-band antenna further includes an inductor, which is electrically connected between the fourth radiator and the ground portion.

在一些實施例中，第四輻射體為L形。 In some embodiments, the fourth radiator is L-shaped.

100‧‧‧雙頻段天線 100‧‧‧Dual band antenna

100C‧‧‧共振曲線 100C‧‧‧Resonance curve

110‧‧‧第一天線部 110‧‧‧First antenna part

112‧‧‧訊號饋入部 112‧‧‧Signal feed-in

114a、114b‧‧‧第一輻射體 114a, 114b‧‧‧First radiator

114O‧‧‧開口 114O‧‧‧Opening

116‧‧‧第二輻射體 116‧‧‧Second radiator

116a‧‧‧第一延伸部 116a‧‧‧First extension

120‧‧‧第二天線部 120‧‧‧Second antenna section

122‧‧‧第三輻射體 122‧‧‧third radiator

122a‧‧‧第二延伸部 122a‧‧‧Second extension

124‧‧‧第四輻射體 124‧‧‧Fourth radiator

130‧‧‧接地部 130‧‧‧Grounding part

200‧‧‧雙頻段天線 200‧‧‧Dual band antenna

200C‧‧‧共振曲線 200C‧‧‧Resonance curve

250‧‧‧電感 250‧‧‧Inductance

CB‧‧‧電路板 CB‧‧‧Circuit board

FP‧‧‧訊號饋入點 FP‧‧‧Signal feed-in point

G‧‧‧間隙 G‧‧‧Gap

為讓本發明之上述和其他目的、特徵、優點與 實施例能更明顯易懂，所附圖式之詳細說明如下：[圖1]係繪示根據本發明第一實施例之雙頻段天線的結構示意圖；[圖2]係繪示根據本發明第二實施例之雙頻段天線的結構示意圖；以及[圖3]係繪示根據本發明實施例之雙頻段天線之共振曲線的示意圖。 In order to make the above and other objects, features, advantages of the present invention and The embodiment can be more obvious and easy to understand. The detailed description of the accompanying drawings is as follows: [FIG. 1] is a schematic diagram showing the structure of a dual-band antenna according to the first embodiment of the present invention; [FIG. 2] is a schematic diagram of the dual band antenna according to the present invention The structure diagram of the dual band antenna of the second embodiment; and [FIG. 3] is a diagram showing the resonance curve of the dual band antenna according to the embodiment of the present invention.

關於本文中所使用之『第一』、『第二』、...等，並非特別指次序或順位的意思，其僅為了區別以相同技術用語描述的元件或操作。 Regarding the "first", "second", etc. used in this text, it does not specifically refer to the order or sequence, but only to distinguish elements or operations described in the same technical terms.

請參照圖1，其係繪示根據本發明第一實施例之雙頻段天線100的結構示意圖。雙頻段天線100包含第一天線部110、第二天線部120以及接地部130。第一天線部110包含訊號饋入部112、複數個第一輻射體114a和114b、以及一第二輻射體116。訊號饋入部112係電性連接至訊號饋入點FP，以接收天線訊號。在本實施例中，天線訊號係透過訊號饋入組件(例如，同軸線)來饋入至訊號饋入部112。具體而言，訊號饋入組件包含訊號端和接地端，其中訊號饋入組件之訊號端連接至訊號饋入點FP，而訊號饋入組件之接地端則連接至接地部130。 Please refer to FIG. 1, which is a schematic structural diagram of a dual-band antenna 100 according to a first embodiment of the present invention. The dual-band antenna 100 includes a first antenna part 110, a second antenna part 120 and a ground part 130. The first antenna part 110 includes a signal feeding part 112, a plurality of first radiators 114 a and 114 b, and a second radiator 116. The signal feeding part 112 is electrically connected to the signal feeding point FP to receive the antenna signal. In this embodiment, the antenna signal is fed to the signal feeding portion 112 through a signal feeding component (for example, a coaxial line). Specifically, the signal feed-in component includes a signal terminal and a ground terminal. The signal terminal of the signal feed component is connected to the signal feed point FP, and the ground terminal of the signal feed component is connected to the ground 130.

第一輻射體114a和114b係形成一天線裝置，並電性連接至訊號饋入部112，以接收天線訊號。在本實施例 中，此天線裝置為平面倒F型天線(Planar inverted-F antenna；PIFA)，但本發明之實施例並不受限於此。如圖1所示，在本實施例中，第一輻射體114a為U型結構，其一端係電性連接至訊號饋入部112，而另一端係電性連接至第一輻射體114b。第一輻射體114b為接地之連接體，其係電性連接於第一輻射體114a和接地部130之間，以將天線裝置電性接地。第一輻射體114a具有開口114O，其係朝向訊號饋入部112。另外，第一輻射體114b係平行於訊號饋入部112。 The first radiators 114a and 114b form an antenna device, and are electrically connected to the signal feeding portion 112 to receive antenna signals. In this example In this case, the antenna device is a Planar inverted-F antenna (PIFA), but the embodiment of the present invention is not limited thereto. As shown in FIG. 1, in this embodiment, the first radiator 114a has a U-shaped structure, one end of which is electrically connected to the signal feeding portion 112, and the other end is electrically connected to the first radiator 114b. The first radiator 114b is a grounded connection body, which is electrically connected between the first radiator 114a and the grounding portion 130 to electrically ground the antenna device. The first radiator 114a has an opening 114O which faces the signal feeding portion 112. In addition, the first radiator 114b is parallel to the signal feeding portion 112.

第二輻射體116係電性連接至訊號饋入部112，以接收天線訊號。第一輻射體114a和114b所形成之天線裝置與第二輻射體116分別位於訊號饋入部112之相對兩側，且第二輻射體116係朝向第二天線部120延伸。 The second radiator 116 is electrically connected to the signal feeding part 112 to receive the antenna signal. The antenna device formed by the first radiators 114 a and 114 b and the second radiator 116 are respectively located on opposite sides of the signal feeding portion 112, and the second radiator 116 extends toward the second antenna portion 120.

第二天線部120包含第三輻射體122以及第四輻射體124。在本實施例中，第二輻射體116具有第一延伸部116a，其係朝向第三輻射體122延伸，且不與第三輻射體122接觸。第三輻射體122具有第二延伸部122a，其係朝向第二輻射體116延伸，且不與第二輻射體116接觸。具體而言，第二輻射體116與第三輻射體122之間具有間隙G，其係實體隔開第二輻射體116與第三輻射體122。如此，第二輻射體116與第三輻射體122可組成電容性饋入(Capacitively driven feed)結構。另外，在本實施例中，第二輻射體116和第三輻射體122為L形，且第一延伸部116a與第二延伸部122a平行，但本發明之實施例並不受限 於此。 The second antenna part 120 includes a third radiator 122 and a fourth radiator 124. In this embodiment, the second radiator 116 has a first extension 116 a that extends toward the third radiator 122 and does not contact the third radiator 122. The third radiator 122 has a second extension portion 122 a that extends toward the second radiator 116 and does not contact the second radiator 116. Specifically, there is a gap G between the second radiator 116 and the third radiator 122, which physically separates the second radiator 116 and the third radiator 122. In this way, the second radiator 116 and the third radiator 122 can form a capacitively driven feed structure. In addition, in this embodiment, the second radiator 116 and the third radiator 122 are L-shaped, and the first extension 116a is parallel to the second extension 122a, but the embodiment of the present invention is not limited Here.

第四輻射體124係電性連接至第三輻射體122，以接收天線訊號。在本實施例中，第四輻射體124為L形，其一端係電性連接至第三輻射體122，而另一端係電性連接至接地部130。另外，在本實施例中，第一天線部110、第二天線部120以及接地部130皆為金屬片，且設置於電路板CB上。舉例而言，第一天線部110、第二天線部120以及接地部130可以銅片製成，但本發明之實施例並不受限於此。 The fourth radiator 124 is electrically connected to the third radiator 122 to receive antenna signals. In this embodiment, the fourth radiator 124 is L-shaped, one end of which is electrically connected to the third radiator 122 and the other end is electrically connected to the ground 130. In addition, in this embodiment, the first antenna portion 110, the second antenna portion 120, and the ground portion 130 are all metal sheets and are disposed on the circuit board CB. For example, the first antenna portion 110, the second antenna portion 120, and the ground portion 130 may be made of copper sheet, but the embodiment of the present invention is not limited thereto.

在習知技術中，傳統的1/2波長迴路天線僅能提供高頻成份。相較於習知技術，本發明可應用由第二輻射體116與第三輻射體122所組成之電容性饋入結構來額外提供低頻成份。藉此，本發明之雙頻段天線100可達到雙頻之功能，且具有較小的天線體積。因為天線體積變小，相同空間裡可放置更多天線(例如，多輸入多輸出(Multi-input Multi-output；MIMO))，進而達到高傳輸速率。再者，將本發明之雙頻段天線100放置於電子產品(例如，智慧型手機)的左上角和右上角等位置，可達到高傳輸速率而且近似全向性場型的效能，將有助於增加信號涵蓋範圍，適用於Wifi通訊系統或適用此頻段之通訊系統。 In the prior art, the traditional 1/2-wavelength loop antenna can only provide high-frequency components. Compared with the prior art, the present invention can apply a capacitive feeding structure composed of the second radiator 116 and the third radiator 122 to provide additional low-frequency components. Thereby, the dual-band antenna 100 of the present invention can achieve dual-band function and has a smaller antenna volume. Because the antenna volume becomes smaller, more antennas (for example, Multi-input Multi-output (MIMO)) can be placed in the same space to achieve a high transmission rate. Furthermore, placing the dual-band antenna 100 of the present invention in the upper left corner and upper right corner of an electronic product (for example, a smart phone) can achieve high transmission rate and approximate omnidirectional field-type performance, which will help Increase signal coverage, suitable for Wifi communication system or communication system suitable for this frequency band.

請參照圖2，其係繪示根據本發明第二實施例之雙頻段天線200的結構示意圖。雙頻段天線200係類似於雙頻段天線100，但不同之處在於雙頻段天線200更包含電感250。電感250係電性連接於第四輻射體124以及接地部130 之間。電感250係用以調整雙頻段天線200的共振特性。 Please refer to FIG. 2, which is a schematic structural diagram of a dual-band antenna 200 according to a second embodiment of the present invention. The dual-band antenna 200 is similar to the dual-band antenna 100, but the difference is that the dual-band antenna 200 further includes an inductor 250. The inductor 250 is electrically connected to the fourth radiator 124 and the ground 130 between. The inductor 250 is used to adjust the resonance characteristics of the dual-band antenna 200.

請參照圖3，其係繪示根據本發明實施例之雙頻段天線100之共振曲線100C與雙頻段天線200之共振曲線200C的示意圖，其中座標縱軸代表電壓駐波比(Voltage Standing Wave Ratio；VSWR)。如圖3所示，雙頻段天線100之共振頻率為2.9GHz以及7GHz。透過設置電感250，雙頻段天線200可將共振頻率調整至2430MHz以及5810MHz，使得雙頻段天線200可提供2G與5G兩個頻段。 Please refer to FIG. 3, which shows a schematic diagram of the resonance curve 100C of the dual-band antenna 100 and the resonance curve 200C of the dual-band antenna 200 according to an embodiment of the present invention, where the vertical axis of the coordinates represents the voltage standing wave ratio (Voltage Standing Wave Ratio; VSWR). As shown in FIG. 3, the resonance frequencies of the dual-band antenna 100 are 2.9 GHz and 7 GHz. By setting the inductor 250, the dual-band antenna 200 can adjust the resonance frequency to 2430 MHz and 5810 MHz, so that the dual-band antenna 200 can provide two frequency bands, 2G and 5G.

雖然本發明已以數個實施例揭露如上，然其並非用以限定本發明，在本發明所屬技術領域中任何具有通常知識者，在不脫離本發明之精神和範圍內，當可作各種之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。 Although the present invention has been disclosed in several embodiments as above, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field to which the present invention pertains can make various modifications without departing from the spirit and scope of the present invention. Modifications and modifications, therefore, the scope of protection of the present invention shall be subject to the scope of the attached patent application.

100‧‧‧雙頻段天線 100‧‧‧Dual band antenna

110‧‧‧第一天線部 110‧‧‧First antenna part

112‧‧‧訊號饋入部 112‧‧‧Signal feed-in

114a、114b‧‧‧第一輻射體 114a, 114b‧‧‧First radiator

114O‧‧‧開口 114O‧‧‧Opening

116‧‧‧第二輻射體 116‧‧‧Second radiator

116a‧‧‧第一延伸部 116a‧‧‧First extension

120‧‧‧第二天線部 120‧‧‧Second antenna section

122‧‧‧第三輻射體 122‧‧‧third radiator

122a‧‧‧第二延伸部 122a‧‧‧Second extension

124‧‧‧第四輻射體 124‧‧‧Fourth radiator

130‧‧‧接地部 130‧‧‧Grounding part

CB‧‧‧電路板 CB‧‧‧Circuit board

FP‧‧‧訊號饋入點 FP‧‧‧Signal feed-in point

G‧‧‧間隙 G‧‧‧Gap

Claims (10)

一種雙頻段天線，包含：一接地部；一第一天線部，包含：一訊號饋入部，電性連接至一訊號饋入點，以接收一天線訊號；複數個第一輻射體，組成一天線裝置，其中該天線裝置之一端係電性連接至該訊號饋入部，該天線裝置之另一端係電性連接至該接地部；以及一第二輻射體，電性連接至該訊號饋入部，其中該第二輻射體與該天線裝置設置於該訊號饋入部之相對兩側；以及一第二天線部，包含：一第三輻射體，其中該第二輻射體與該第三輻射體組成一電容性饋入結構，且該第二輻射體與該第三輻射體之間具有一間隙；以及一第四輻射體，其中該第四輻射體之一端係電性連接至該第三輻射體，該第四輻射體之另一端係電性連接至該接地部。 A dual-band antenna, comprising: a grounding part; a first antenna part, comprising: a signal feeding part electrically connected to a signal feeding point to receive an antenna signal; a plurality of first radiators forming one day Wire device, wherein one end of the antenna device is electrically connected to the signal feeding part, the other end of the antenna device is electrically connected to the ground part; and a second radiator is electrically connected to the signal feeding part, The second radiator and the antenna device are arranged on opposite sides of the signal feeding part; and a second antenna part includes: a third radiator, wherein the second radiator and the third radiator are composed of A capacitive feeding structure with a gap between the second radiator and the third radiator; and a fourth radiator, wherein one end of the fourth radiator is electrically connected to the third radiator , The other end of the fourth radiator is electrically connected to the ground portion. 如申請專利範圍第1項所述之雙頻段天線，其中該天線裝置為一平面倒F型天線(Planar inverted-F antenna；PIFA)。 The dual-band antenna described in item 1 of the scope of patent application, wherein the antenna device is a Planar inverted-F antenna (PIFA). 如申請專利範圍第2項所述之雙頻段天線，其中該平面倒F型天線包含：一U型結構，該U型結構之一端電性連接至該訊號饋入部；以及一連接體，電性連接於該U型結構之另一端與該接地部之間。 The dual-band antenna described in item 2 of the scope of patent application, wherein the planar inverted-F antenna includes: a U-shaped structure, one end of the U-shaped structure is electrically connected to the signal feeding part; and a connector, which is electrically connected Connected between the other end of the U-shaped structure and the ground portion. 如申請專利範圍第3項所述之雙頻段天線，其中該U型結構具有一開口，該開口係朝向該訊號饋入部。 The dual-band antenna described in item 3 of the scope of patent application, wherein the U-shaped structure has an opening, and the opening faces the signal feeding portion. 如申請專利範圍第3項所述之雙頻段天線，其中，該連接體係平行於該訊號饋入部。 The dual-band antenna described in item 3 of the scope of patent application, wherein the connection system is parallel to the signal feed-in part. 如申請專利範圍第1項所述之雙頻段天線，其中該第二輻射體具有一第一延伸部，該第三輻射體具有一第二延伸部，該第一延伸部係朝向該第三輻射體延伸，該第二延伸部係朝向該第二輻射體延伸。 The dual-band antenna described in the scope of patent application 1, wherein the second radiator has a first extension, the third radiator has a second extension, and the first extension radiates toward the third The body extends, and the second extension portion extends toward the second radiator. 如申請專利範圍第6項所述之雙頻段天線，其中該第一延伸部係平行於該第二延伸部。 The dual-band antenna described in item 6 of the scope of patent application, wherein the first extension is parallel to the second extension. 如申請專利範圍第1項所述之雙頻段天線，其中該第四輻射體直接連接至該接地部。 The dual-band antenna described in item 1 of the scope of patent application, wherein the fourth radiator is directly connected to the ground portion. 如申請專利範圍第1項所述之雙頻段天線，更包含一電感，電性連接於該第四輻射體與該接地部之間。 The dual-band antenna described in item 1 of the scope of patent application further includes an inductor, which is electrically connected between the fourth radiator and the ground portion. 如申請專利範圍第1項所述之雙頻段天線，其中該第四輻射體為L形。 In the dual-band antenna described in item 1 of the scope of patent application, the fourth radiator is L-shaped.
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