1254493 九、發明說明： 【發明所屬之技術領域】 本發明係為-種雙頻倒F形天線（dual_band inverted-F antenna )，特別是—種利用一調整金屬片 (mningpatch )來增加頻寬之雙頻倒天線’適合應 用於900/1800 MHz雙頻之操作。 ' 【先前技術】 > ㈣通訊的發展越來越廣泛，所衍生的通訊產品也 越來越多樣化，除了手機和個人數位助理（PDA)之 外二未來的行動通訊也將成為筆記型電腦的基本功能。 目刖習用於無線通訊產品的倒F形天線大多均應用在無 線區域網路所需的2.4 GHz ( 2.4-2.484 GHz )、及5 GHz (5.15 5.j5 、5.725-5.875 GHz )頻帶；台灣專利公告號第 563,274 5虎“雙頻天線”及台灣專利公告號第Mu”號 “多頻天線”，所揭示-種利用筆記型電腦液晶螢幕所 | 内建的接地面，在其接地面上設計倒F形天線的例子， 但疋上述天線只限用於無線區域網路系統。如果我們設 計一種應用在行動通訊系統GSM ( 89〇_96〇MHz)與DU (1710-1880 MHZ )雙頻倒F形天線，兔發現其高頻 ?CS頻帶）的頻寬不容易達到要求。而—般習知技術 疋以加大天線尺寸或外加寄生元件來增加頻寬，但這兩 種技術均明顯的增加天線的高度。在此我們提出一種利 用-調整金屬月的創新設計，在幾乎不增加天線的高度 6 1254493 的情況下，使得高頻的頻寬能達到要求。 發明内容】 如上所述，本發明之目的在於提供一種具有一 :屬片的雙頻倒F形天線。本發明包括：一接地心 二上方侧邊邊緣附近具有一短路點與一接地點；一 =射i ^ 7C件’位於該接地面之上方侧邊邊緣附近 〇 '第一輻射元件，大致平行於該接地面；—第二^ 件：其朝向與該第-輻射元件相反方向延伸；及： H射元件’ A致垂直於該第—輻射元件及該第二_ :，亚連接該第—輻射元件與該第二㈣元件开 :形轄射金屬元件，且該第三轄射元件包含一=成 :二調整金屬片’電氣連接至該第二《射元件…短 一：疋件’其形狀大致為-倒L形，位於該第一幸 =與該接地面之間，用以將該τ形輻 =地面之該短路點；及-同轴傳輸線，其包 俨 '導版’連接至該τ形輻射金屬元件之該第三輻射-地點。 Λ帛地*體’连接至該接地面之镇接 :本項設計中，我們可以藉由調 當的的長度和寬度，以及配人盥兮斤ά ό 蜀片適 的位置，使得該天線之—第：口二輪射兀件所連接 能夠有效增加。由以上特性7】权局）操作頻帶的類寬 丁，# 〃 、生在不增加天線高度的限制 1我們仍可輕易的利用該調整全屬η φ n ^1254493 IX. Description of the Invention: [Technical Field] The present invention is a dual-band inverted-F antenna, and in particular, an adjustment metal chip (mningpatch) is used to increase the bandwidth. The dual-frequency inverted antenna is suitable for operation at 900/1800 MHz dual frequency. '[Prior Art] > (4) The development of communication is more and more extensive, and the derivative communication products are becoming more and more diversified. In addition to mobile phones and personal digital assistants (PDAs), the future mobile communication will become a notebook computer. The basic function. Most of the inverted-F antennas used in wireless communication products are used in the 2.4 GHz (2.4-2.484 GHz) and 5 GHz (5.15 5.j5, 5.725-5.875 GHz) bands required for wireless local area networks; Taiwan patents Bulletin No. 563, 274 5 Tiger "Double Frequency Antenna" and Taiwan Patent Publication No. Mu "Multi-Frequency Antenna", Revealed - Using a Notebook LCD Screen | Built-in ground plane, designed on its ground plane An example of an inverted F antenna, but the above antenna is limited to wireless local area network systems. If we design an application in the mobile communication system GSM (89〇_96〇MHz) and DU (1710-1880 MHZ) dual frequency down F-shaped antennas, rabbits found that the bandwidth of their high-frequency?CS band) is not easy to meet the requirements. However, the conventional technique is to increase the antenna size or add parasitic components to increase the bandwidth, but both techniques are obvious. Increasing the height of the antenna. Here we propose an innovative design that uses the -adjustment of the metal moon, so that the frequency of the high frequency can be achieved without increasing the height of the antenna 6 1254493. SUMMARY OF THE INVENTION As described above, this Purpose of the invention A dual-frequency inverted-F antenna having a zoning piece is provided. The invention includes: a grounding point having a short-circuit point and a grounding point near the upper edge of the grounding core; and a = i ^ 7C piece 'located at the grounding surface a first radiating element adjacent to an upper side edge thereof, substantially parallel to the ground plane; a second component: extending in a direction opposite to the first radiating element; and: an H-emitting element 'A perpendicular to the first a radiating element and the second _:, the sub-connecting the first radiating element and the second (four) element opening: the modulating metal element, and the third urging element comprises a = two: two adjusting metal piece 'electrical connection Up to the second "ejecting element ... short one: the piece" has a shape substantially - an inverted L shape, between the first fortune = and the ground plane, for the τ-shaped spoke = the short-circuit point of the ground; And a coaxial transmission line, the package 'guide plate' is connected to the third radiation-location of the τ-shaped radiating metal element. The grounding body is connected to the grounding surface of the town: in this design, we It can be adjusted by the length and width, as well as the appropriate position of the 蜀 蜀 蜀Therefore, the connection of the antenna--the two-injection of the antenna can be effectively increased. The above-mentioned characteristic 7] is the width of the operating band, # 〃 , born without increasing the limit of the antenna height 1 we can still easily The use of this adjustment is all η φ n ^
形天線的頻寬。 片Μ加雙頻倒F 7 1254493 • 【實施方式】 • >考第i圖，為一般習知的應用在無線區域網路之 雙頻倒F形天線}。 4 ·弟2圖為本發明之雙頻倒F形天線一實施例2，包 一接地面23，於其上方侧邊邊緣233附近具有一短 ^ 接地點232 ; 一 τ形輻射金屬元件24，位 I亥接地面23之上方侧邊邊緣233附近，其包含：一第 一軲射兀件241 ，大致平行於該接地面23 ; 一第二輻射 _ -仵〜42 ，其朝向與該第一輻射元件241相反方向延 伸；及一第三輻射元件243 ，大致垂直於該第一輻射元 7 241及該第二輻射元件242，並連接該第一輻射元件 ^41與該第二輻射元件242形成該τ形輕射金屬元件 =且該第三輻射元件243包含一饋入點244 ; 一調整 金屬片27,電氣連接至該第二輻射元件2幻；一短路金 ^元件25，其形狀大致為—倒[形，位於該第—輕射元 m ^ 241與該接地面23之間，用以將該T形㈣金屬元件 24紐路到該接地面23之該短路點231丨及一同軸傳輸線 26，其包含：一中心導體261 ，連接至該T形輻射金屬 凡件24之該第三輻射元件243之該饋入點244 ;及一接 地‘體262，連接至該接地面23之該接地點232。在本 實施例2中，該T形輻射金屬元件24與該調整金屬片巧 係由一單一金屬片利用沖壓（siamping )或切割 (cutting )製程製作。 第3圖為未加調整金屬片之參考天線3 ，此參考天 8The bandwidth of the antenna. Μ Μ plus dual frequency inverted F 7 1254493 • [Embodiment] • > test i picture, is a commonly known dual-frequency inverted F-shaped antenna for wireless local area network}. The second embodiment of the dual-frequency inverted-F antenna of the present invention includes a grounding surface 23 having a short grounding point 232 near the upper side edge 233 thereof; a τ-shaped radiating metal component 24, Near the upper side edge 233 of the I-grounding surface 23, comprising: a first radiating element 241 substantially parallel to the grounding surface 23; a second radiation _-仵~42, the orientation of the first The radiating element 241 extends in opposite directions; and a third radiating element 243 is substantially perpendicular to the first radiating element 7 241 and the second radiating element 242, and is connected to the first radiating element 41 and the second radiating element 242 The τ-shaped light-emitting metal element=and the third radiating element 243 includes a feed point 244; an adjustment metal piece 27 electrically connected to the second radiation element 2; a short-circuited gold element 25 having a shape substantially An inverted [shape, located between the first-light element m ^ 241 and the ground plane 23 for the short-circuit point 231 of the T-shaped (four) metal component 24 to the ground plane 23 and a coaxial transmission line 26, comprising: a center conductor 261 connected to the T-shaped radiant metal member 24 Three radiating elements 243 of the feeding point 244; and a grounding '262, is connected to the ground plane 23 of the grounding point 232. In the second embodiment, the T-shaped radiating metal member 24 and the adjusting metal piece are fabricated by a single metal sheet by a siamping or cutting process. Figure 3 shows the reference antenna 3 without an adjusted metal piece. This reference day 8
V 1254493 „ 線3即是將第2圖的本發明之雙頻倒F形天線2移除該 調整金屬片27，並調整該T形輻射金屬元件之該第二輻 射元件242之長度後而成。 第4圖為第2圖天線與第3圖天線之返回損失實驗 量測結果；在實施例2中，為考慮筆記型電腦液晶螢幕 内建之接地面環境，我們選擇接地面23之長度約為260 — mm、寬度約為200 mm ;該T形輻射金屬元件之該第一V 1254493 „ Line 3 is obtained by removing the double-frequency inverted-F antenna 2 of the present invention of FIG. 2 from the adjustment metal piece 27 and adjusting the length of the second radiation element 242 of the T-shaped radiation metal element. Fig. 4 is the experimental results of the return loss of the antenna of Fig. 2 and the antenna of Fig. 3; in the second embodiment, in order to consider the ground plane environment built in the liquid crystal screen of the notebook computer, we select the length of the ground plane 23 260 mm and width of about 200 mm; the first of the T-shaped radiating metal components
輻射元件241之長度約為84 mm、寬度約為2 mm ;該T _ 形輻射金屬元件之該第二輻射元件242之長度約為17 mm、寬度約為2 mm ;該T形輻射金屬元件之該第三輻 射元件243之長度約為7 mm、寬度約為1 mm ;該饋入點 244與該短路點231之距離約為20 mm ;該調整金屬片 27之長度約為16 mm、寬度約為10 mm。而在參考天線 3中，該T形輻射金屬元件34之該第二輻射元件342之 長度約為40 mm、寬度約為2 mm。由所得實驗結果，在 返回損失小於10 dB的定義下，參考天線3之返回損失 籲量測結果41之第二（較高）模態無法涵蓋DCS (17KM880 MHZ )行動通訊頻段，而實施例2之返回損 失量測結果42之第二（較高）模態足夠涵蓋DCS (17HM880 MHZ )行動通訊頻段。 第5圖為該調整金屬片之形狀結構圖5，該調整金 屬片27形狀可以選自於一矩形54、一正方形51、一三角 形53、一半圓形52、一多邊形55所組成之一族群。 第6圖為本發明天線之第一其他實施例6，可將該 9 1254493 • ㉟整金屬片67經由-次彎折後大致形成〆倒L形，其目 ~ 的在於减少調整金屬片67所佔用的空間。 第7圖為本發明天線之第二其他實施例7，可將該 調整金屬片77經由二次彎折後大致形成一匚形，其目的 在於減少調整金屬片77所佔用的空間。 以上"兒明中所述之實施例僅為說明本發明之原理及 力f匕叩非限制本發明°目此，習於此技術之人士可在 •不違背本發明之精神對上述實施例進行修改及變化。本 • #明之權利範圍如後述之申請專利範圍所列。 【圖式簡單說明】 第1圖為習知倒F形天線一實施例結構圖。 第2圖為本發明天線一實施例結構圖。 第3圖為未加調整金屬片之參考天線結構圖 弟4圖為弟2圖天線及第3圖天線之返回損失實驗量測 、論果比較。 • 第5圖為調整金屬片之形狀結構圖 第6圖為本發明天線之第一其他實施例結構圖 第7圖為本發明天線之第二其他實施例結構圖 【主要元件符號說明】 1 :習知倒F形天線 ^ •具有一調整金屬片的倒F形天線之—實施例 10 1254493 23 :系統接地面或筆記型電腦液晶螢幕（LCD)之支撐 金屬背板 231 :短路點 232 :接地點 233 :系統接地面之一侧邊邊緣 24 : T形輻射金屬元件 241 :第一輻射元件 242 :第二輻射元件 243 ··第三輻射元件 244 :饋入點 25 :短路金屬元件 26 :饋入信號同軸傳輸線 261 :饋入信號同軸傳輸線之中心導體 262 :饋入信號同軸傳輸線之接地導體 27 :調整金屬片 3 :未加調整金屬片之參考天線 34 : T形輻射金屬元件 342 ··第二輻射元件 41 :圖3天線之返回損失量測結果 42 :圖2天線之返回損失量測結果 5 •調整金屬片的形狀結構 11 1254493 51 :正方形調整金屬片 52 :半圓形調整金屬片 53 :三角形調整金屬片 54 :矩形調整金屬片 55 :多邊形調整金屬片 • 6 i 67 :本發明之具有一調整金屬片之倒F形天線之第一 其他實施例 :具一次彎折之調整金屬片 7 :本發明之具有一調整金屬片之倒F形天線之第二 其他實施例 77 :具二次彎折之調整金屬片 12The radiating element 241 has a length of about 84 mm and a width of about 2 mm; the second radiating element 242 of the T-shaped radiating metal element has a length of about 17 mm and a width of about 2 mm; the T-shaped radiating metal element The length of the third radiating element 243 is about 7 mm and the width is about 1 mm; the distance between the feeding point 244 and the short-circuit point 231 is about 20 mm; the length of the adjusting metal piece 27 is about 16 mm and the width is about It is 10 mm. In the reference antenna 3, the second radiating element 342 of the T-shaped radiating metal member 34 has a length of about 40 mm and a width of about 2 mm. From the experimental results obtained, under the definition that the return loss is less than 10 dB, the second (higher) mode of the return loss call measurement result 41 of the reference antenna 3 cannot cover the DCS (17KM880 MHZ) mobile communication band, and the embodiment 2 The second (higher) mode of the return loss measurement result 42 is sufficient to cover the DCS (17HM880 MHZ) mobile communication band. Fig. 5 is a view showing the shape of the adjustment metal piece. The shape of the adjustment metal piece 27 may be selected from a group consisting of a rectangle 54, a square 51, a triangle 53, a half circle 52, and a polygon 55. Figure 6 is a first other embodiment 6 of the antenna of the present invention. The 9 1254493 • 35 whole metal piece 67 can be bent into an L-shaped shape after being bent-folded, and the purpose is to reduce the adjustment metal piece 67. The space occupied. Fig. 7 is a second embodiment 7 of the antenna of the present invention. The adjusting metal piece 77 can be substantially formed into a meander shape after being bent twice, for the purpose of reducing the space occupied by the adjusting metal piece 77. The embodiments described above are merely illustrative of the principles and advantages of the present invention, and are not intended to limit the invention, and those skilled in the art can practice the above embodiments without departing from the spirit of the invention. Make changes and changes. The scope of the rights of #本明 is listed in the scope of the patent application described later. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view showing an embodiment of a conventional inverted-F antenna. Fig. 2 is a structural view showing an embodiment of an antenna according to the present invention. Figure 3 is a reference antenna structure diagram of unadjusted metal piece. Figure 4 shows the experimental measurement and comparison of the return loss of the antenna of Figure 2 and the antenna of Figure 3. Figure 5 is a structural view of the first embodiment of the antenna of the present invention. Figure 7 is a structural view of the second embodiment of the antenna of the present invention. Conventional inverted F-shaped antenna ^ • An inverted F-shaped antenna with an adjustment metal piece - Embodiment 10 1254493 23 : System ground plane or notebook computer LCD screen support metal back plate 231 : Short circuit point 232 : Location 233: One side edge of the system ground plane 24: T-shaped radiating metal element 241: First radiating element 242: Second radiating element 243 · Third radiating element 244: Feeding point 25: Shorted metal element 26: Feed Incoming signal coaxial transmission line 261: feed signal coaxial transmission line center conductor 262: feed signal coaxial transmission line ground conductor 27: adjustment metal piece 3: unadjusted metal piece reference antenna 34: T-shaped radiation metal element 342 · · 2 radiating element 41: return loss measurement result of antenna of Fig. 3: return loss measurement result of antenna of Fig. 2 5: shape structure of adjusting metal piece 11 1254493 51 : square adjusting metal piece 52 : semicircular Whole metal piece 53: triangular adjustment metal piece 54: rectangular adjustment metal piece 55: polygonal adjustment metal piece • 6 i 67: The first other embodiment of the inverted F-shaped antenna with an adjustment metal piece of the present invention: one bend Adjusting metal piece 7: second embodiment 77 of the present invention having an inverted F-shaped antenna with an adjusting metal piece: adjusting metal piece 12 with secondary bending