201034285 六、發明說明： - 【發明所屬之技術領域】 本發明係關於一種天線，特別是一種可多頻操作之天 線’適合應用於無線通訊產品上。 【先前技術】 隨著無線通訊技術的蓬勃發展，無線網路（wireless network)的應用越來越廣泛，而筆記型電腦結合無線通訊 鲁 網路也是相當普遍的應用。近年筆記型電腦上的應用除了 傳統的無線區域網路（WLAN)之外，更加入了全球互通微 波存取（WiMAX)、行動通訊(m〇biie communicati〇n)以及數位 電視（DTV)等多種應用，因此筆記型電腦之天線設計勢必 朝向多頻化之趨勢。在這些無線通訊應用中，天線的性能 會影響通訊產品傳輪與接收信號品質，為影響產品價值的 重要關鍵之一。台灣專利公開號第2〇〇82〇489號“ 一種雙 頻天線’’，其揭示—種利用雙路徑的方式使天綠 魯操作’不過該天線缺乏全球微波存取互通又/ 通訊功*，因Λ無法達成雙網之操作，且該天線體稽=之 ’倘若要在筆記型電腦内部有限的空間達成多斯乂大 WiMAX雙網操作，具有相當高的挑戰性。 AN/ 【發明内容】 為了解決上述先前技術之問題，本發明提出—夕 天線，其不射Μ蓋2.4/5遍GHz 1ΑΝ及冰種多頻 GHzWiMAX頻帶之多頻操作，且結構簡 5/5·5 匆於印刷或 201034285 蝕刻於介質基板上，同時亦可達到天線體積縮小化之功 效，相當適合應用於筆記型電腦等無線通訊裝置中。 本發明天線包含：一接地面、一支撐基板及一輻射金 屬部。該支撐基板之一側邊鄰近該接地面之一侧邊；該輻 射金屬部係以蝕刻或印刷技術形成於該支撐基板之一表面 上，並包含：一第一輻射金屬部及一第二輻射金屬部。該 第輻射金屬部之一端具有一槽縫，該槽缝激發一帶拒頻 帶，使得該天線增加一操作頻帶，另一端則電氣連接至該 接地面，且該第一輻射金屬部長度少於該天線第一（最低 )操作頻帶中心鮮之四分之—波長；該第二輻射金屬部 為該第一輕射金屬部及該接地面所包圍，其一端為天線饋 入點’用於電氣連接至一訊號源，另一端則為開口端，且 該第二輻射金屬部與該第一輻射金屬部具有槽縫之一端之 間具有一特定間距。 在本發明天線中，該輻射金屬部包含一第一輻射金屬 部=-第二㈣金屬部’主要以耦合的方式將電磁能量由 ，第二ϋ射金屬料過該特定間距來激發該第—輻射金屬 ，，而該第-輕射部所激發者為天線之第一操作頻帶，該 第二轄射部所激發者為第三操作頻帶，均共振約在四分^ -波長=態，其中該f—輻射金屬部之長度少於該天線之 第一（最低）操作頻帶中心頻率之四分之一波長，這是由 於本項發明天線是以餘刻或印刷方式形成於—支標介質基 板上，因此其共振長度會較—般四分之—波長短，此外: 201034285 本發明天線於第一輻射金屬部之開口端置入一槽縫，其長 度接近4GHz的四分之-波長，因此可激發—位於4GHz 左右之帶拒頻帶’同時使得該天線於3.5 GHz之電抗值接近 零點，因而激發一個新的共振模態來涵蓋35GHzWiMAx 之操作頻帶（該天線之第二操作頻帶），且該帶拒頻帶對 於該天線原有的2.5 GHz頻帶（該天線之第一（最低）操作 頻可）及5.5 GHz頻帶（該天線之第三操作頻帶）影響甚 小。本天線經由適當的調整該特定間距，可以使得天線三 _ 個彳呆作頻帶均達成良好的阻抗匹配，進而能滿足 2.4/5.2/5.8 GHz WLAN (2400 〜2484 / 5150 〜5350 / 5725 〜5825 MHz)以及2.5/3.5/5.5 GHz WiMAX (2500 〜2690 / 3400 〜3700 / 5250〜5850 MHz)之多頻操作，同時本天線具有相當小的尺 寸’僅約9x13 mm2，適合置放於一筆記型電腦内部或一行 動通訊裝置内部為一内藏式天線應用。 【實施方式】 ❷ 參考第1圖為本發明天線一實施例1之結構圖，該天 線包含：一接地面H、一支撐基板12及一輻射金屬部13。 該接地面11為一筆記型電腦液晶螢幕之支撐金屬背板或為 一行動通訊裝置之系統接地面；該支撐基板12為一介質基 板’且該支撐基板12之一侧邊鄰近該接地面之一側邊in ;該輻射金屬部13係以蝕刻或印刷技術形成於該支撐基板 之一表面121上，並包含：一第一輻射金屬部131及一第 二輻射金屬部132。該第一輻射金屬部131之一端具有一 201034285 該_i4激發—帶拒頻帶’使得該天線增加—摔 作=，另一端則電氣連接至該接地仙，且 呆 金屬部131長度少於該天線第一（ $田射 頻率之四分之-波長；♦亥第1身=)#作頻帶21中心 A w 長"亥第一軲射金屬部132為該第一轳 射金屬部131及該接地面n所包圍，田 n〇 , rn ΛΤ ^ ^為天線饋入點 133用於電氣連接至一訊號源15，另—诚目，丨^ 且5亥苐一 _屬部132與該第-輕射金屬部131且有槽 縫之-端之間具有一特定間距134，該特定間距134一』 均須少於3咖以得収航電额合量來達縣發明天 線多頻操作之良好匹配。 第2圖為本發明天線實施例1之實測返回損失圖。1 中橫軸代表操作頻率’縱軸代表返回損失。考慮筆記型電 細液曰曰榮幕支樓金屬背板，本實施例選擇該接地面η長度 約為260mm、寬度約為2〇〇麵；該支撐基板12為長度約為 咖、寬度約為9mm及厚度約為〇4咖的玻纖介質基 板’及輕射金屬部13，包含：一第一輕射金屬部⑶之長 度約為22mm、寬度約為2 5mm，且具有一槽縫15，其長 度約為12.5mm、寬度約為lmm ;及一第二輻射金屬部 之長度約為14.5 mm、寬度約為1.5 mm，且該第二輻 射金屬部132與該第一輻射金屬部131具有槽缝之一端之 間具有一特定間距134為i mm。由實驗量測結果可知， 在10 dB返回損失定義下，本發明天線於第一（最低）操 作頻帶21可涵蓋2.4 GHz WLAN/2.5 GHz WiMAX之兩個頻 201034285 帶 =線第—'操作頻帶22可涵蓋3.5 GHz WiMAX之頻帶、 5.2/5.8 GHz WLAN A 5.5 GHz201034285 VI. Description of the Invention: - Technical Field of the Invention The present invention relates to an antenna, and more particularly to an antenna capable of multi-frequency operation, which is suitable for use in a wireless communication product. [Prior Art] With the rapid development of wireless communication technology, wireless networks are becoming more and more widely used, and notebook computers combined with wireless communication Lu are also quite common applications. In recent years, in addition to the traditional wireless local area network (WLAN), the application on the notebook computer has joined the global interoperability microwave access (WiMAX), mobile communication (m〇biie communicati〇n) and digital television (DTV). Application, so the antenna design of the notebook computer is bound to face the trend of multi-frequency. In these wireless communication applications, the performance of the antenna affects the quality of the transmission and reception signals of the communication products, which is one of the important factors affecting the value of the product. Taiwan Patent Publication No. 2〇〇82〇489 “A Dual-Frequency Antenna”, which reveals that the use of dual-paths enables Tianlulu to operate 'but the antenna lacks global microwave access and communication/communication*, Because the operation of the dual network cannot be achieved, and the antenna body's 'has to achieve the Dos WiMAX dual-network operation in the limited space inside the notebook computer, it is quite challenging. AN/ [Summary] In order to solve the above problems of the prior art, the present invention proposes an antenna, which does not cover a 2.4/5-pass GHz 1ΑΝ and multi-frequency operation of the ice multi-frequency GHz WiMAX band, and has a simple structure 5/5·5 rushed to print or 201034285 is etched on the dielectric substrate and can also achieve the effect of reducing the size of the antenna. It is suitable for use in wireless communication devices such as notebook computers. The antenna of the present invention comprises: a ground plane, a support substrate and a radiating metal portion. One side of the support substrate is adjacent to one side of the ground plane; the radiating metal portion is formed on one surface of the support substrate by etching or printing technology, and includes: a first radiation gold And a second radiating metal portion, the one end of the radiating metal portion has a slot, the slot exciting a band rejection band, the antenna is added to an operating band, and the other end is electrically connected to the ground plane, and the The length of a radiating metal portion is less than a quarter of a wavelength of the first (lowest) operating band of the antenna; the second radiating metal portion is surrounded by the first light metal portion and the ground plane, and one end of the antenna is an antenna The feed point 'is electrically connected to a signal source, and the other end is an open end, and the second radiating metal portion and the first radiating metal portion have a specific spacing between one end of the slot. The radiant metal portion includes a first radiant metal portion=-the second (four) metal portion ′ is mainly configured to couple electromagnetic energy from the second radiant metal material through the specific spacing to excite the first radiant metal. The first light-emitting portion is the first operating frequency band of the antenna, and the second illuminating portion is excited by the third operating frequency band, and the resonance is about four minutes - the wavelength = state, wherein the f-radiation The length of the metal part Less than a quarter of the wavelength of the first (lowest) operating band center frequency of the antenna. This is because the antenna of the present invention is formed on the substrate substrate in a residual or printed manner, so that the resonant length is longer. Generally, the wavelength is short, and in addition: 201034285 The antenna of the present invention is provided with a slit at the open end of the first radiating metal portion, and its length is close to a quarter-wavelength of 4 GHz, so that it can be excited - at a band around 4 GHz. The rejection band' also causes the antenna's reactance value at 3.5 GHz to approach zero, thus exciting a new resonant mode to cover the 35 GHz WiMAx operating band (the second operating band of the antenna), and the band rejection band is for the antenna. The 2.5 GHz band (the first (lowest) operating frequency of the antenna) and the 5.5 GHz band (the third operating band of the antenna) have little effect. By properly adjusting the specific spacing, the antenna can achieve good impedance matching for the three 天线 彳 频带 , , , , , , , 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 ) and multi-frequency operation of 2.5/3.5/5.5 GHz WiMAX (2500 ~ 2690 / 3400 ~ 3700 / 5250 ~ 5850 MHz), while the antenna has a relatively small size 'only about 9x13 mm2, suitable for placement in a notebook computer The internal or a mobile communication device is internally built for a built-in antenna. [Embodiment] FIG. 1 is a structural view of a first embodiment of an antenna according to the present invention. The antenna includes a ground plane H, a support substrate 12, and a radiating metal portion 13. The ground plane 11 is a support metal backplane of a notebook computer LCD screen or a system ground plane of a mobile communication device; the support substrate 12 is a dielectric substrate 'and one side of the support substrate 12 is adjacent to the ground plane The radiant metal portion 13 is formed on one surface 121 of the support substrate by etching or printing, and includes a first radiant metal portion 131 and a second radiant metal portion 132. One end of the first radiating metal portion 131 has a 201034285, the _i4 excitation-band rejection band is such that the antenna is increased-falling, the other end is electrically connected to the grounding, and the length of the metal portion 131 is less than the antenna. First (the quarter of the field frequency - wavelength; ♦ hai first body =) # for the band 21 center A w length " hai first 金属 metal part 132 is the first 金属 metal part 131 and the Surrounded by the ground plane n, the field n〇, rn ΛΤ ^ ^ is the antenna feed point 133 for electrical connection to a signal source 15, another - Chengmu, 丨 ^ and 5 苐 苐 _ 132 132 132 132 132 132 132 132 132 The light-emitting metal portion 131 has a specific spacing 134 between the ends of the slot, and the specific spacing 134- ′′ must be less than 3 coffee to obtain the sum of the collected power to achieve good multi-frequency operation of the invention antenna. match. Fig. 2 is a graph showing the measured return loss of the antenna embodiment 1 of the present invention. 1 The horizontal axis represents the operating frequency and the vertical axis represents the return loss. Considering the metal back plate of the notebook type electric liquid 曰曰 曰曰 支 支 , , , , , , , , 接地 接地 接地 η η η 接地 η η η η η η η η η η η η η η η η η η η η a glass fiber substrate of 9 mm and a thickness of about 4 Å and a light metal portion 13 comprising: a first light metal portion (3) having a length of about 22 mm, a width of about 25 mm, and a slit 15 The length of the second radiating metal portion is about 14.5 mm and the width is about 1 mm; and the length of the second radiating metal portion is about 14.5 mm and the width is about 1.5 mm, and the second radiating metal portion 132 and the first radiating metal portion 131 have grooves. There is a specific spacing 134 between the ends of the slits of i mm. From the experimental measurement results, the antenna of the present invention can cover two frequencies of 2.4 GHz WLAN/2.5 GHz WiMAX in the first (lowest) operating frequency band 21 under the definition of 10 dB return loss. 201034285 Band = Line No. - Operation Band 22 Covers the 3.5 GHz WiMAX band, 5.2/5.8 GHz WLAN A 5.5 GHz
WlMAX之三個頻帶，同時注意到在該天線第二操作頻帶 22附近’該天線具有—帶拒頻帶μ位於約4GHz左右 該槽縫15所激發。 … 第3圖為本發明天線實施例1之輸入阻抗圖，分別為 本發月天線二施例1之輪人阻抗電阻曲線圖31與電抗曲線 春® 32，其中南阻抗值33位置對應於第2圖中之帶拒頻帶^ &另有天線未具有—槽縫b之輸人阻抗電阻曲線圖別與電 才几曲線圖35，在益μ緣】ς _ 牡.、，、僧縫15之情況下，在4GHz附近則無該 ㈤由g中可知該高阻抗值33所對應之帶拒頻帶 2^之中心頻率約於4Giiz，同時使得該天線於3 5GHz之電 抗值接近零點36 ’且對於該天線原有的25GHz&55GHz兩 個操作頻可之輸入阻抗影響甚小，因此本發明天線可滿足 2.4/5.2/5.8GHz WLAN 及 2 5/3 5/5 5 GHzWiMAX 多頻操作。 + f 4圖為本發明之第一其它實施例4結構圖，其中該 第一輪射金屬部431與該第二輻射金屬部432位於該支撐 基板12之不同表面上’其他天線結構與實施例1相同。實 施例4整體天線結論與實施例丨油，因此亦能獲得與實 施例1近似的結果。 第5圖為本發明之第二其它實施例5結構圖，其中該 接地面51具有-彎折5G1，其他天線結構與實施例！相同 201034285 。實施例5整體亦能獲得與實施例1近似的結果。 第6圖為本發明之第三其它實施例6結構圖，包含： 一接地面11、一支撐基板62及一輻射金屬部63。該接地面 11為一筆記型電腦之支撐金屬背板或一行動通訊裝置之系 統接地面；該支撐基板62為一介質基板，且該支撐基板62 之一側邊鄰近該接地面之一側邊111 ;該輻射金屬部63係 以蝕刻或印刷技術形成於該支撐基板之一表面621上，並 包含：一天線接地面66、一第一輻射金屬部131及一第二 輻射金屬部132。該天線接地面66經由貫孔661電氣連接 至該接地面11 ;該第一輻射金屬部131之一端具有一槽缝 15，用於激發一帶拒頻帶23，使得該天線產生該第二操作 頻帶22，另一端則電氣連接至該天線接地面66，且該第一 輻射金屬部131長度少於該天線第一（最低）操作頻帶21 中心頻率之四分之一波長；該第二輻射金屬部132為該第 一輻射金屬部131及該天線接地面66所包圍，其一端為天 線饋入點133，用於電氣連接至一訊號源15，另一端則為 開口端，且該第二輻射金屬部132與該第一輻射金屬部 131具有槽縫之一端之間具有一特定間距134，該特定間 距134 —般均須少於3mm以得到足夠之電容耦合量來達 成本發明天線之良好匹配。實施例6之天線結構與實施例 1相似，因此亦能獲得與實施例1近似的結果。 以上說明中所述之實施例僅為說明本發明之原理及其 功效，而非限制本發明。因此，習於此技術之人士可在不 201034285 .違背本發明之精神對上述實施例進行修改及變化。本發明 之權利範圍應如後述之申請專利範圍所列。The three frequency bands of WlMAX, while noting that in the vicinity of the second operating band 22 of the antenna, the antenna has a band rejection band μ located around about 4 GHz. Fig. 3 is an input impedance diagram of the antenna embodiment 1 of the present invention, which is respectively the antenna impedance resistance curve 31 of the antenna of the first embodiment and the reactance curve spring® 32, wherein the south impedance value 33 corresponds to the first 2 In the figure, the band rejection band ^ & another antenna does not have the slot impedance of the input impedance curve diagram and the electric curve diagram 35, in the benefit of the edge] ς _ ..,,, quilting 15 In the case of 4 GHz, there is no such thing as (5) that the center frequency of the band rejection band 2 corresponding to the high impedance value 33 is about 4Giiz, and the reactance value of the antenna at 35 GHz is close to zero 36'. The input impedance of the two operating frequencies of the original 25 GHz & 55 GHz antenna has little influence on the antenna, so the antenna of the invention can satisfy 2.4/5.2/5.8 GHz WLAN and 2 5/3 5/5 5 GHz WiMAX multi-frequency operation. + f 4 is a structural diagram of the first other embodiment 4 of the present invention, wherein the first and second radiating metal portions 431 and the second radiating metal portion 432 are located on different surfaces of the supporting substrate 12 'other antenna structures and embodiments 1 is the same. The overall antenna conclusion of Example 4 is the same as that of the example, so that the results similar to those of the embodiment 1 can be obtained. Figure 5 is a structural view of a second embodiment 5 of the present invention, wherein the ground plane 51 has a bend 5G1, other antenna structures and embodiments! Same as 201034285. The results similar to those of Example 1 were also obtained as a whole in Example 5. Figure 6 is a structural view of a third embodiment of the present invention, comprising: a ground plane 11, a support substrate 62 and a radiating metal portion 63. The grounding surface 11 is a supporting metal backing plate of a notebook computer or a system grounding surface of a mobile communication device; the supporting substrate 62 is a dielectric substrate, and one side of the supporting substrate 62 is adjacent to one side of the grounding surface The radiant metal portion 63 is formed on one surface 621 of the support substrate by etching or printing technology, and includes an antenna ground plane 66, a first radiating metal portion 131, and a second radiating metal portion 132. The antenna ground plane 66 is electrically connected to the ground plane 11 via a through hole 661; one end of the first radiating metal portion 131 has a slot 15 for exciting a band rejection band 23, so that the antenna generates the second operating band 22 The other end is electrically connected to the antenna ground plane 66, and the length of the first radiating metal portion 131 is less than a quarter wavelength of the center frequency of the first (lowest) operating frequency band 21 of the antenna; the second radiating metal portion 132 The first radiating metal portion 131 and the antenna ground plane 66 are surrounded by one end of the antenna feeding point 133 for electrically connecting to a signal source 15 and the other end being an open end, and the second radiating metal portion 132 has a specific spacing 134 between the first radiating metal portion 131 and one end of the slot, which is generally less than 3 mm to obtain a sufficient amount of capacitive coupling to achieve a good match of the antenna of the present invention. The antenna structure of the embodiment 6 is similar to that of the embodiment 1, and therefore, results similar to those of the embodiment 1 can be obtained. The embodiments described in the above description are merely illustrative of the principles of the invention and its advantages, and are not intended to limit the invention. Therefore, those skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the invention. The scope of the invention should be as set forth in the appended claims.
9 201034285 【圖式簡單說明】 第1圖為本發明天線一實施例結構圖。 第2圖為本發明天線一實施例之實測返回損失圖。 第3圖為本發明天線一實施例之輸入阻抗圖。 第4圖為本發明天線第一其他實施例結構圖。 第5圖為本發明天線第二其他實施例結構圖。 第6圖為本發明天線第三其他實施例結構圖。 【主要元件符號說明】 1 :本發明天線一實施例 4 :本發明天線第一其他實施例 5 :本發明天線第二其他實施例 6 :本發明天線第三其他實施例 11,51 :接地面或筆記型電腦液晶螢幕之支撐金屬 背板或行動通訊裝置之系統接地面 111,511 :接地面之一側邊 112 :短路點 12, 62 :支撐基板 121,621 :支撐基板之一表面 13, 43, 63 .幸虽射金屬部 131,431 :第一輻射金屬部 132, 432 .第二轄射金屬部 133,433 :天線饋入點，第二輻射金屬部之一端 134,434 :特定間距 201034285 14, 44 15 21 22 23 24 31 • 32 33 34 35 36 501 66 ❹661 :槽缝 :信號源 :第一（最低）操作頻帶 :第二操作頻帶 :帶拒頻帶 :第三操作頻帶 :本發明天線輸入阻抗之電阻曲線圖 :本發明天線輸入阻抗之電抗曲線圖 :本發明天線輸入阻抗之高阻抗值 :天線未有一槽缝輸入阻抗之電阻曲線谓 :天線未有一槽缝輸入阻抗之電抗曲線圖 :帶拒頻帶附近之一共振點或接近零電抗點 :接地面之一彎折 :天線接地面 :貫孔 119 201034285 [Simplified description of the drawings] Fig. 1 is a structural view showing an embodiment of an antenna according to the present invention. Fig. 2 is a graph showing the measured return loss of an embodiment of the antenna of the present invention. Figure 3 is an input impedance diagram of an embodiment of the antenna of the present invention. Fig. 4 is a structural view showing the first other embodiment of the antenna of the present invention. Fig. 5 is a structural view showing a second embodiment of the antenna of the present invention. Figure 6 is a structural view showing a third embodiment of the antenna of the present invention. [Main component symbol description] 1 : Antenna of the present invention - Embodiment 4: Antenna of the present invention First Embodiment 5: Antenna of the present invention Second Embodiment 6: Antenna of the third embodiment of the present invention 11, 51: Ground plane Or the system ground plane of the metal screen of the notebook computer or the mobile communication device 111, 511: one side of the ground plane 112: short circuit point 12, 62: support substrate 121, 621: one surface of the support substrate 13, 43, 63 . Fortunately, the metal portions 131, 431 are: the first radiating metal portions 132, 432. The second radiant metal portions 133, 433 are: the antenna feeding point, and the second radiating metal portion is one end 134, 434: the specific spacing 201034285 14, 44 15 21 22 23 24 31 • 32 33 34 35 36 501 66 ❹661: Slot: Signal source: First (lowest) operating band: Second operating band: Band reject band: Third operating band: Resistance curve of the antenna input impedance of the present invention: The present invention The reactance curve of the antenna input impedance: the high impedance value of the antenna input impedance of the present invention: the resistance curve of the antenna without a slot input impedance is: the reactance curve of the antenna without a slot input impedance: One resonance point or points near zero reactance band around: one ground contact is bent: antenna ground: the through hole 11