1246225 五、發明說明π) -- 【發明所屬之領域】 本餐明係有關一種天線，尤指一種與電子裝置配合使 用’用以發射或者接收電磁訊號之雙頻偶極 【先前技術】 β ° 近幾年，無線局域網（WLAN )是發展最快的無線通信技 術之一，其主要採用IEEE 8 02.Ua/b/g三大標準、\其;， IEEE 8 0 2. 1 1 b/g標準適用於2· 4-2· 5GHz頻段，另一種標準 IEEE 8 0 2· 1 la 則適用於5_6GHz 頻段。 丁 在以前的無線通訊技術中應用較多的是基於丨EEE 8 0 2 · 1 1 b標準。後來，隨著無線網路的進一步發展，工eee 8 0 2. 1 1 a也因其傳輸速度快，適用頻帶不易受到干擾及訊 號不搶佔頻道等諸多優點及關鍵晶片出現，使得丨EEE 8 0 2· 11a產品生產成本降低，與該標準相應的產品也大量 出現在市場上。目前，由於ΙΕΕΕ 8〇2· 1 lb/g和IEEE 8 0 2· 11a無線通信標準分別有著各自的優點，且考慮到相 容性的問題，故既能工作於2. 4GHz又能工作於5· 2GHz的雙 頻通信產品在市場上逐漸興起，如雙頻無線網卡、雙頻無 線局域網訪問節點等。 然而，無論哪一種無線通信產品，要想實現雙頻功效 ，雙頻天線總是其不可缺少的元件。其中，雙頻偶極天線 以其結構簡單、設計方便、技術發展成熟且易於製造等特 點，被廣泛應用於電子裝置。 在現有技術中，雙頻偶極天線的實現方式有很多。如 臺灣專利公告第547784號中揭示了一種以同軸線的内導體1246225 V. Description of the invention π)-[Field of invention] This meal is related to an antenna, especially a dual-frequency dipole used in conjunction with electronic devices to transmit or receive electromagnetic signals [prior art] β ° In recent years, wireless local area network (WLAN) is one of the fastest-growing wireless communication technologies. It mainly uses the three major standards of IEEE 8 02.Ua/b/g, \ its ;, IEEE 8 0 2. 1 1 b / g The standard applies to the 2 · 4-2 · 5GHz frequency band, and the other standard IEEE 8 0 2 · 1la applies to the 5-6GHz frequency band. D In the previous wireless communication technology, it is mostly based on the EEE 8 0 2 · 1 1 b standard. Later, with the further development of wireless networks, industrial eee 8 0 2. 1 1 a also because of its fast transmission speed, the applicable frequency band is not easy to be interfered with and the signal does not preempt channels, and many other advantages and key chips appear, making EEE 8 0 2.11a product production costs have been reduced, and products corresponding to this standard have also appeared in the market in large numbers. At present, because ΙΕΕΕ 8〇2 · 1 lb / g and IEEE 8 0 · 11a wireless communication standards have their own advantages, and considering compatibility issues, it can work at 2.4 GHz and 5 2GHz dual-band communication products are gradually emerging in the market, such as dual-band wireless network cards, dual-band wireless LAN access nodes, and so on. However, no matter what kind of wireless communication product, if you want to achieve dual-band efficiency, dual-band antenna is always its indispensable component. Among them, dual-frequency dipole antennas are widely used in electronic devices due to their simple structure, convenient design, mature technology development, and easy manufacturing. In the prior art, there are many ways to implement a dual-frequency dipole antenna. For example, Taiwan Patent Publication No. 547784 discloses a coaxial inner conductor
第7頁 1246225 五、發明說明（2) 作為輻射體的雙頻偶極天線。該天線包括一根導線和接地 金屬管。藉由將導線的内導體露在金屬管以外的部分分歧 成兩支，而形成雙頻天線。然而，在實際製造中，將導線 的内導體分歧成兩支難度較大’且内導體所分歧成的兩支 間的距離是較難掌控的。 又如，美國專利公告第6，4 2 1，0 2 4號揭示了藉由長短 不同的兩對金屬套筒來分別工作於較低頻率和較高頻率的 雙頻偶極天線。此類雙頻偶極天線包括一對長金屬管，一 對短金屬管以及同軸饋線。短金屬管包圍在長金屬管的外 部。長金屬管與短金屬管共有一封閉端。同軸饋線包括内春 導體，與封閉端電性連接。長金屬管及同軸饋線組成第一 偶極天線，工作於較低頻率。短金屬管及同軸饋線組成第 二偶極天線，工作於較高頻率。然而，此類天線使用了較 多的金屬材料’故成本較而。 【内容】 本發明的目的在於提供一種易於製造、成本低、結構 簡單且體積較小的雙頻偶極天線。 為了實現上述目的和避免現有技術中的缺陷，本發明 採用如下技術方案：本發明雙頻偶極天線包括第一天線和 第二天線。第一天線工作在較高頻段，包括第一偶極元件β 及第二偶極元件；其中第一偶極元件包括第一水平部及第 一垂直部，第二偶極元件包括第二水平部及第二垂直部， 第一水平部與第二水平部相互平行，第一垂直部與第二垂 直部分別從第一水平部及第二水平部延伸出來，且向相反Page 7 1246225 V. Description of the invention (2) Dual-frequency dipole antenna as radiator. The antenna includes a wire and a grounded metal tube. A bi-band antenna is formed by branching the inner conductor of the wire outside the metal tube into two branches. However, in actual manufacturing, it is more difficult to divide the inner conductor of the wire into two branches, and the distance between the two branches of the inner conductor is difficult to control. As another example, U.S. Patent Publication No. 6, 4 2 1, 0 2 4 discloses a dual-frequency dipole antenna that operates at lower frequencies and higher frequencies by using two pairs of metal sleeves of different lengths. Such dual-frequency dipole antennas include a pair of long metal tubes, a pair of short metal tubes, and a coaxial feed line. Short metal tubes surround the long metal tubes. The long metal tube and the short metal tube share a closed end. The coaxial feeder includes an inner spring conductor and is electrically connected to the closed end. The long metal tube and coaxial feed line form the first dipole antenna, which works at lower frequencies. The short metal tube and coaxial feed line form a second dipole antenna, which works at higher frequencies. However, this type of antenna uses more metal materials and is therefore more costly. [Content] The object of the present invention is to provide a dual-frequency dipole antenna that is easy to manufacture, low in cost, simple in structure, and small in size. In order to achieve the above object and avoid the defects in the prior art, the present invention adopts the following technical solution: The dual-frequency dipole antenna of the present invention includes a first antenna and a second antenna. The first antenna operates in a higher frequency band and includes a first dipole element β and a second dipole element. The first dipole element includes a first horizontal portion and a first vertical portion, and the second dipole element includes a second horizontal portion. Part and the second vertical part, the first horizontal part and the second horizontal part are parallel to each other, and the first vertical part and the second vertical part respectively extend from the first horizontal part and the second horizontal part and are opposite to each other
1246225 五、發明說明（3) 方向延伸。第二天線工作在較低頻段，其結構和第一天線 一致，包括第三偶極元件及第四偶極元件；其中第三偶極 元件包括第三水平部及第三垂直部，第四偶極元件包括第 四水平部及第四垂直部，第三水平部與第四水平部相互平 行，第三垂直部與第四垂直部分別從第三水平部和第四水 平部延伸出來，且向相反方向延伸。第二天線的第三、第 四垂直部比第一天線的第一、第二垂直部長。第一天線的 第一、第二水平部分別和第二天線的第三、第四水平部垂 直相交。同軸線穿過第一天線的第一、第二水平部以及第 二天線的第三、第四水平部，其内導體與第一天線的第一鲁 偶極元件及第二天線的第三偶極元件電性連接，其外導體 與第一天線的第二偶極元件及第二天線的第四偶極元件電 性連接。 與現有技術相比，本發明雙頻偶極天線的結構簡單， 體積較小，使用材料較少，節省製造成本，且易於製造。 【實施方式】 請參照第一圖所示，本發明雙頻偶極天線1包括第一 天線1 0和第二天線2 0。 第一天線1 0包括第一偶極元件1 1及第二偶極元件1 2。 第一偶極元件1 1位於第二偶極元件1 2的正上方，二者間相 隔有一定間距（例如：2毫米）。第一偶極元件1 1呈U形， 開口向上，由矩形金屬片製成，包括第一垂直部1 1 a及第 一水平部1 1 b。第一垂直部1 1 a包括兩相互平行且大小相同 的金屬片，分別從第一水平部1 1 b的兩短側邊垂直向上延1246225 5. Description of the invention (3) Extending in the direction. The second antenna operates in a lower frequency band and has the same structure as the first antenna, including a third dipole element and a fourth dipole element. The third dipole element includes a third horizontal portion and a third vertical portion. The four dipole element includes a fourth horizontal portion and a fourth vertical portion, the third horizontal portion and the fourth horizontal portion are parallel to each other, and the third vertical portion and the fourth vertical portion extend from the third horizontal portion and the fourth horizontal portion, respectively. And extend in the opposite direction. The third and fourth vertical portions of the second antenna are longer than the first and second vertical portions of the first antenna. The first and second horizontal portions of the first antenna intersect perpendicularly with the third and fourth horizontal portions of the second antenna, respectively. The same axis passes through the first and second horizontal portions of the first antenna and the third and fourth horizontal portions of the second antenna, and its inner conductor is connected to the first dipole element of the first antenna and the second antenna. The third dipole element is electrically connected, and its outer conductor is electrically connected to the second dipole element of the first antenna and the fourth dipole element of the second antenna. Compared with the prior art, the dual-frequency dipole antenna of the present invention has a simple structure, a small volume, less material, saves manufacturing costs, and is easy to manufacture. [Embodiment] Referring to the first figure, the dual-frequency dipole antenna 1 of the present invention includes a first antenna 10 and a second antenna 20. The first antenna 10 includes a first dipole element 11 and a second dipole element 12. The first dipole element 11 is located directly above the second dipole element 12 with a certain distance between them (for example: 2 mm). The first dipole element 11 is U-shaped, the opening is upward, and is made of a rectangular metal sheet, and includes a first vertical portion 1 1 a and a first horizontal portion 1 1 b. The first vertical portion 1 1 a includes two parallel metal pieces of the same size and extends vertically from the two short sides of the first horizontal portion 1 1 b, respectively.
第9頁 1246225 五、發明說明（4) :且延：至同-水平高度。第二偶極元件1 2呈门形，開 :T 矩化金屬片製成，包括第二垂直部12a及第二 二^部12\。第;^垂直部12a包括兩相互平行且大小相同的 孟蜀片，刀別k第二水平部j 2 b的兩短側邊垂直向下延伸 杜5延伸至同一水平高&。第-偶極元件1 1和第二偶極元 件12的大小相同，且以過第一水平部nb及第二水平部 垂^連線中點的一水平面鏡像對稱。第一水平部丨】b上設 有第一孔100^，第二水平部12b上設有第二孔2〇〇。在本實 她方式中，第一孔1 0 0位於第一水平部丨丨b的中央位置，第 二孔2 0 0位於第二水平部12b的中央位置。 第一偶極元件1 1及第二偶極元件丨2可分別視為雙頻偶 極天線1的第一輻射部及第一接地部。 — 第一天線2 0包括第三偶極元件2 1及第四偶極元件2 2。 第二偶極元件21位於第四偶極元件22的正上方，二者間相 隔有一定間距（例如：2毫米）。第三偶極元件21呈U形， 開口向上’由矩形金屬片製成，包括第三垂直部21a及第 二水平部2 1 b。第三垂直部2 1 a包括兩相互平行且大小相同 的金屬片’分別從第三水平部2丨^的兩短側邊垂直向上延 伸’且延伸至同一水平高度，其延伸長度長於第一垂直部 1 1 a。第四偶極元件2 2呈门形，開口向下，由矩形金屬片 製成，包括第四垂直部22a及第四水平部22b。第四垂直部 2 2 a包括兩相互平行且大小相同的金屬片，分別從第四水 平部2 2 b的兩短側邊垂直向下延伸，且延伸至同一水平高 度’其延伸長度長於第二垂直部12a。第三偶極元件21及Page 9 1246225 V. Description of the invention (4): and extension: to the same-level height. The second dipole element 12 is gate-shaped and is made of: T rectangular metal sheet, and includes a second vertical portion 12a and a second second portion 12 \. The first vertical portion 12a includes two Meng Shu films parallel to each other and of the same size. The two short sides of the second horizontal portion j 2 b of knife k extend vertically downward. Du 5 extends to the same horizontal height & The first-dipole element 11 and the second dipole element 12 have the same size and are mirror-symmetrical with a horizontal plane passing through the midpoint of the first horizontal portion nb and the second horizontal portion. The first horizontal portion 丨] b is provided with a first hole 100 ^, and the second horizontal portion 12b is provided with a second hole 2000. In this embodiment, the first hole 100 is located at the center of the first horizontal portion 丨 b, and the second hole 200 is located at the center of the second horizontal portion 12b. The first dipole element 11 and the second dipole element 1 and 2 can be regarded as the first radiation part and the first ground part of the dual-frequency dipole antenna 1, respectively. — The first antenna 20 includes a third dipole element 21 and a fourth dipole element 22. The second dipole element 21 is located directly above the fourth dipole element 22 with a certain distance between them (for example: 2 mm). The third dipole element 21 is U-shaped, and the opening is made of a rectangular metal sheet, and includes a third vertical portion 21a and a second horizontal portion 2 1 b. The third vertical portion 2 1 a includes two parallel metal pieces of the same size which extend vertically upward from the two short sides of the third horizontal portion 2 ^^, respectively, and extend to the same horizontal height, whose extension length is longer than the first vertical Department 1 1 a. The fourth dipole element 22 has a gate shape, is opened downward, and is made of a rectangular metal sheet, and includes a fourth vertical portion 22a and a fourth horizontal portion 22b. The fourth vertical portion 2 2 a includes two metal pieces that are parallel to each other and of the same size, and extend vertically downward from the two short sides of the fourth horizontal portion 2 2 b, respectively, and extend to the same horizontal level. Vertical portion 12a. Third dipole element 21 and
1H1 第]〇頁 1246225 五、發明說明（5) 第四偶極元件2 ? 66 士 , ^ π 二水平部1 小相同，且以過第一水平部1 1 b及第 ^ 1 ^直連線中點的—水平面鏡像對稱。 極元ΪΓ的/Λϋ及第四偶極元件22可分別視為雙頻偶 才兀仵1的弟—輻射部及第二接地部。 和外二ί轰上:：括内導體40、内絕緣層42、金屬編織層43 2〇〇 Λ ί圖示）。該同轴線4穿過第一孔100及第二孔 端被Λ ^^直則18的延伸方向。同轴線4在其 編:戶— I弟一孔100及第二孔2 0 0之間露出一段金屬 ' ς曰 t内絕緣層42。金屬編織層43于第二孔2〇() 干 第一水平部12b上，與第二偶極元件12及第 四偶極元件22電性連接。同軸線4的内導 弟1H1 page] 〇 page 1246225 V. Description of the invention (5) The fourth dipole element 2? 66 ,, ^ π The two horizontal parts 1 are the same, and they are directly connected through the first horizontal part 1 1 b and the ^ 1 ^ Midpoint—The horizontal plane is mirror-symmetric. The / Λϋ of the polar element ΪΓ and the fourth dipole element 22 can be regarded as the radiating part and the second ground part of the dual-frequency dipole element 1 respectively. On the outside and on the outside: Including the inner conductor 40, the inner insulation layer 42, and the metal braided layer (2 200 Λ). The coaxial line 4 passes through the first hole 100 and the end of the second hole and is extended by ^^^ to extend in the direction of 18. In the same axis 4, a segment of a metal 'inner insulation layer 42 is exposed between the first hole 100 and the second hole 200 of the first hole. The metal braided layer 43 is electrically connected to the second dipole element 12 and the fourth dipole element 22 on the first horizontal portion 12b of the second hole 20 (). Inner guide on the same axis 4
附近被焊接於第一皮芈卹U L Λ — 札1 U U 二 弟水千部Ub上，與第一偶極元件η及第 一 70 電性連接。在第一孔1 〇 〇附近的焊點即為第 一天線10及第二天線20的饋點。 針對本毛明雙頻偶極天線1，第一偶極部1 1可看作該 雙頻偶線1的第一輻射部，帛以發射及接收高頻電磁 信號；第三偶極部21可看作該雙頻偶極天線的第二輻射部 ，用於發射和接收低頻電磁信號。第一偶極元件丨丨及第三 偶極^件21或第二偶極元件12和第四偶極元件22可以由= 個十字交叉形的金屬片通過四邊向下彎折一體成型，也可 =由兩個不同的金屬片分別製成η形，再將二者的水平部 分相f在一起而形成，作為該雙頻偶極天線1的接地部。 上述第一、二輻射部及接地部以同軸線4呈軸對稱。 第二圖為本發明雙頻偶極天線1電壓駐波比測試記錄 1246225 五、發明說明（6) 圖。從記錄圖可以看出天線在2 . 4 G - 2 . 5 G Η z頻帶内，電壓 駐波比都小於π 2Π ，上述頻帶給出了高達1 〇〇ΜΗζ的帶寬， 該帶寬包括了基於ΙΕΕΕ8 0 2· 1 lb/g及藍牙的無線通信帶寬 。天線在4 · 8 G - 5 · 8 G Η z頻帶内，電壓駐波比也小於·，2 ” ，該 頻帶給出了 1G的帶寬，基本滿足ΙΕΕΕ8 0 2·丨丨3標準無線通 訊頻寬（5· 15-5· 35GHz、5· 72 5-5· 875GHz)。第三圖到第六 圖給出了雙頻天線1分別工作在2· 45GHz、5· 25GHz時的水 平極化及垂直極化電磁輻射場圖，可以看出這些輻射場圖 沒有明顯的輻射盲區，符合天線的實際應用條件。 ^ 綜上所述，本發明確已符合發明專利之要件，爰依法_ θ出專利申請。惟’以上所述僅為本發明之較佳實施方式 提自不能以此限定本發明之權利範圍。舉凡所屬技術領域 中具有通常知識者麦依本發明之精神所作之等效修飾或變 中，、.皆仍涵蓋於後附之申請專利範圍内。 化，0Nearby is welded to the first leather shirt U L Λ — Za 1 U U 2 and the second water part Ub, and is electrically connected to the first dipole element η and the first 70. The solder joints near the first hole 100 are the feed points of the first antenna 10 and the second antenna 20. For this Maoming dual-frequency dipole antenna 1, the first dipole section 11 can be regarded as the first radiating section of the dual-frequency dipole line 1 to transmit and receive high-frequency electromagnetic signals; the third dipole section 21 can be regarded as The second radiating part of the dual-frequency dipole antenna is used for transmitting and receiving low-frequency electromagnetic signals. The first dipole element 丨 and the third dipole element 21 or the second dipole element 12 and the fourth dipole element 22 can be integrally formed from four cross-shaped metal sheets by bending downwards on four sides, or = It is formed by two different metal pieces, each of which is formed into an η shape, and then the horizontal parts of the two are formed together to form the ground portion of the dual-frequency dipole antenna 1. The first and second radiating portions and the ground portion are axisymmetric with the coaxial line 4. The second figure is a test record of the voltage standing wave ratio of the dual-frequency dipole antenna 1 of the present invention. 1246225 V. Explanation of the invention (6). It can be seen from the record that the antenna has a voltage standing wave ratio of less than π 2Π in the 2.4 G-2.5 G Η z frequency band. The above frequency band gives a bandwidth as high as 100 ΜΗζ, which includes the bandwidth based on ΙΕΕΕ8 0 2 · 1 lb / g and Bluetooth wireless communication bandwidth. The antenna is in the 4 · 8 G-5 · 8 G Η z band, and the voltage standing wave ratio is also less than ·, 2 ″. This band gives a bandwidth of 1G, which basically meets the standard wireless communication bandwidth of ΙΕΕ8 0 2 · 丨 丨 3. (5 · 15-5 · 35GHz, 5.72 5-5 · 875GHz). The third to sixth figures show the horizontal polarization and vertical when the dual-band antenna 1 operates at 2.45GHz and 5.25GHz respectively. Polarized electromagnetic radiation field patterns, it can be seen that these radiation field patterns do not have obvious radiation dead zones, which meet the practical application conditions of the antenna. ^ In summary, the present invention has indeed met the requirements of the invention patent, according to the law _ θ patent application However, the above is merely a description of the preferred embodiments of the present invention. It is not intended to limit the scope of rights of the present invention. For example, those with ordinary knowledge in the technical field may make equivalent modifications or changes in accordance with the spirit of the present invention. ,,. Are still covered by the attached patent application.
1246225 圖式簡單說明 第一圖係本發明雙頻天線之立體結構圖。 第二圖係本發明雙頻天線電壓駐波比測試圖。 第三圖係本發明雙頻天線工作在2. 45GHz之水平極化電 磁輻射場圖。 第四圖係本發明雙頻天線工作在2. 45GHz之垂直極化電 磁輻射場圖。 第五圖係本發明雙頻天線工作在5. 25GHz之水平極化 電磁輻射場圖。 第六圖係本發明雙頻天線工作在5. 25GHz之垂直極化 電磁輻射場圖。 【元件符號說明】1246225 Brief description of the drawings The first diagram is a three-dimensional structure diagram of the dual-band antenna of the present invention. The second figure is a test chart of the voltage standing wave ratio of the dual-band antenna of the present invention. The third figure is a horizontally polarized electromagnetic radiation field pattern of the dual-frequency antenna of the present invention operating at 2.45 GHz. The fourth figure is a vertically polarized electromagnetic radiation field pattern of the dual-frequency antenna of the present invention operating at 2.45 GHz. The fifth figure is a horizontally polarized electromagnetic radiation field diagram of the dual-frequency antenna of the present invention operating at 5.25 GHz. The sixth figure is a vertically polarized electromagnetic radiation field diagram of the dual-frequency antenna of the present invention operating at 5.25 GHz. [Description of component symbols]
第]3頁 雙 頻 偶 極 天 線 1 第 一 天 線 10 第 一 孔 100 第 一 偶 極 元 件 11 第 一 .垂 直 部 11a 第 一 水 平 部 lib 第 — 偶 極 元 件 12 第 二 垂 直 部 12a 第 二 水 平 部 12b 第 二 天 線 20 第 二 孔 200 第 二 偶 極 元 件 21 第 二 垂 直 部 21a 第 二 水 平 部 21b 第 四 偶 極 元 件. 22 第 四 垂 直 部 22a 第 四 水 平 部 22b 同 軸 線 4 内 導 體 40 内 絕 緣 層 42 金 屬 編 織 層 43Page] 3 dual-frequency dipole antenna 1 first antenna 10 first hole 100 first dipole element 11 first. Vertical portion 11a first horizontal portion lib first — dipole element 12 second vertical portion 12a second horizontal Portion 12b Second antenna 20 Second hole 200 Second dipole element 21 Second vertical portion 21a Second horizontal portion 21b Fourth dipole element. 22 Fourth vertical portion 22a Fourth horizontal portion 22b On-axis 4 Inner conductor 40 Insulation layer 42 Metal braided layer 43