200812150 ，八、本案若有化學式時，請揭示最能顯示發明特徵的化 學式： 九、發明說明： 【發明所屬之技術領域】 本發明係為一種行動通訊天線，特別是一種具有多 頻操作之内藏式蜿蜒迴圈天線。 【先前技術】200812150, VIII. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: IX. Description of the invention: [Technical field of the invention] The present invention is a mobile communication antenna, in particular, a multi-frequency operation Tibetan 蜿蜒 loop antenna. [Prior Art]
近年來隨著行動通訊的快速發展，應用於行動裝置 之内藏式天線已被要求能具有多頻操作的特性，為了達 成多頻操作，許多倒F形天線（PIFA，Planar Inverted-F Antenna)結構已被研究設計並實際應用於行動電話等無 線通訊產品上。然而這類多頻操作的倒F形天線所激發 出來的共振模態都是屬於非平衡式模態，相較於自我平 衡式結構的激發模態，這類非平衡式結構的激發模態會 導致在系統接地面上有較大的表面激發電流，因此當有 損介質（如人的手和頭等）靠近手機時，天線特性會有 較大程度的變差是可以被預期的。為了達成自我平衡結 構的特性，許多設計過的全波長迴圈天線亦被研究並實 際地應用於行動電話内。相關習用天線之設計如美國專 利US6,958,737號“應用於行動設備並具有降低SAR (Specific absorption rate)值之迴圈天線（Loop Antenna For A 6 200812150 - Mobile Terminal Capable of Reducing Specific Absorption Rate)，，和美 國專利US6,236,368號“應用於通信設備之迴圈天線裝配 技術（Loop Antenna Assembly For Telecommunication Devices)”， 其均揭示一種迴圈天線設計。然上述專利之迴圈天線只 具有單頻操作之特性，無法滿足目前行動通訊設備的需 求。因而，本發明係為一種具多頻操作之婉蜒迴圈天 線，藉由適當的蜿蜒迴圈輻射體可以調整共振模態之頻 率比，進而達成多頻操作之目的。 泰 【發明内容】 如上所述，本發明之目的在於提供一種具有多頻操 作之内藏式蜿蜒迴圈天線，以符合目前行動通訊設備的 需求。 而本叙明係包括·一系統接地面；一迴圈輻射金屬 片，一紐路金屬片；及一饋入信號組件。該迴圈輻射金 ⑩ 屬片具有一起始端及一末端，位於該系統接地面之上， 並包含一第一輻射部、一第二輻射部及一第三輻射部； =紐路金屬片之一端電氣連接至該迴圈輻射金屬片之末 舄另鈿電氣連接至該系統接地面；該饋入信號組件 包含-饋人信號源及—饋人金屬片，並位於該系統接地 面與該迴圈輻射金屬片之間，用以傳輸訊韓。 在本項設計中，該第一輻射部大致為一長直狀之金 屬、’田片其端為該迴圈輻射金屬片之起始端。該第二 輻射部亦大致為-長直狀之金屬細片，與該第-輻射部 7 200812150 大=左右對稱位於該迴圈輻射金屬片之兩邊，且㈣二 =部：:端為該迴圈輻射金屬片之末端。該第三輻: 4由-金屬細片婉蜒而成，並具有—起始端及一末端， 該起始端連接至該第-輻射部相對於該迴圈輻射金屬片 :起始端的另一端’而該末端大致朝遠離該起始端的方 向以蜿蜒的方歧伸，並連接至該第二輻射部相對於該 迴圈輻射金屬片之末端的另一端。 【實施方式】 第1 ®為本發日狀喊式婉蜒㈣天線—實施例， 包括.一系統揍地面10; 一迴圈輻射金屬片u，具有一 起始端m及-末端112，位於該系統接地面10ς上， 並包含-第-輻射部12、-第二㈣部13及—第三輕射 部14’該第-輻射部分12大致為—長絲之金屬細片， 其一端為該迴圈輻射金屬片^之起始端m ，該第二輻 ❿射部13，亦大致為一長直狀之金屬細片，與該第一輻身Y 部12大致左右對稱位於該迴圈輻射金屬片n之兩邊，且 該第二輻射13之一端為該迴圈輻射金屬片n之末端 112 ，而該第二輻射部14由一均勻金屬細片蜿蜒而成， 並具有一起始端141及一末端142，該起始端141連接 至該第一輻射部12相對於該迴圈輻射金屬片u之起始端 m的另一端121 ，而該末端142大致朝相反於該起始 端141的方向以蜿蜒的方式延伸，並連接至該第二輻射 部13相對於該迴圈輻射金屬片u之末端112的另一端 200812150 m , 一短路金屬片15，其一端電氣連接至該迴圈輻射 金屬片11之末端112，而另一端電氣連接至該系統接地 面10，該短路金屬片15為一直條狀之金屬片體，並具有 一均勻線寬；及一饋入信號組件，位於該系統接地面10 與該迴圈輻射金屬片U之間，包含一饋入信號源16及一 饋入金屬片17，而該饋入金屬片17 一端電氣連接至該迴 圈輻射金屬片11之起始端m ，其另一端連接至該饋入 _ 信號源16 ’該饋入金屬片17並具有一均勻線寬。 第2圖為一傳統迴圈天線之上視圖，該傳統迴圈天 線其共振模態（半波長模態、全波長模態及15波長模 態）之頻率比大致為1:2:3。 第3圖為本發明天線之一實施例的返回損失實驗量 測結果圖。在本實施例中，該系統接地面1〇之長度約為 100 mm、寬度約為45 mm;該迴圈輻射金屬片η之長度大 致為178mm，接近900MHz之半波長。而藉由適當地蜿 • 蜒該迴圈輻射金屬片11，該蜿蜒迴圈天線的第三共振模 態33 (1.5波長模態）可以被調整至非常靠近該第二共振 模悲32 (全波長模態），進而於高頻帶形成寬頻操作。 由實際量測所得到的實驗結果，在返回損失小於7.3 dB 的疋義下’天線阻抗頻寬可涵蓋無線行動通訊系統In recent years, with the rapid development of mobile communications, built-in antennas for mobile devices have been required to have multi-frequency operation characteristics. In order to achieve multi-frequency operation, many inverted F-shaped antennas (PIFA, Planar Inverted-F Antenna) The structure has been researched and designed and applied to wireless communication products such as mobile phones. However, the resonant modes excited by the inverted-F antenna of this type of multi-frequency operation belong to the unbalanced mode. Compared with the excited mode of the self-balanced structure, the excited mode of this type of unbalanced structure will This results in a large surface excitation current on the system ground plane, so when the lossy medium (such as a person's hand and head) is close to the mobile phone, the antenna characteristics will be greatly deteriorated and can be expected. In order to achieve the characteristics of a self-balancing structure, many designed full-wavelength loop antennas have also been studied and actually applied to mobile phones. The design of the related conventional antenna is as described in US Patent No. 6,958,737, "Loop Antenna For A 6 200812150 - Mobile Terminal Capable of Reducing Specific Absorption Rate", And US Patent No. 6,236,368, "Loop Antenna Assembly For Telecommunication Devices", both of which disclose a loop antenna design. However, the loop antenna of the above patent has only a single frequency operation. The characteristics cannot meet the requirements of current mobile communication devices. Therefore, the present invention is a multi-frequency operation of a loop antenna, and the frequency ratio of the resonant modes can be adjusted by a suitable helium loop radiator, thereby achieving The purpose of multi-frequency operation is as follows: As described above, the object of the present invention is to provide a built-in loop antenna with multi-frequency operation to meet the requirements of current mobile communication devices. Including a system grounding surface; a ring of radiation metal sheet, a new road metal sheet; and a a signal component. The loop radiation gold 10 piece has a starting end and an end, is located above the grounding surface of the system, and includes a first radiating portion, a second radiating portion and a third radiating portion; One end of the metal piece is electrically connected to the end of the loop radiating metal piece and is electrically connected to the grounding surface of the system; the feed signal component comprises a feed source and a donor metal piece, and is located at the ground plane of the system Between the metal sheet and the radiating metal sheet, the first radiating portion is substantially a long straight metal, and the end of the field is the radiating metal sheet of the loop. The second radiating portion is also a substantially long straight metal thin piece, and the first radiating portion 7 200812150 is larger than left and right symmetrically on both sides of the loop radiating metal piece, and (4) two = part:: end is The loop radiates the end of the metal sheet. The third spoke: 4 is formed of a metal thin piece and has a starting end and an end, the starting end being connected to the first radiating portion radiating relative to the loop Metal piece: the other end of the starting end' and the end is substantially far The direction from the starting end extends in a square shape and is connected to the other end of the end of the second radiating portion with respect to the end of the radiating metal piece. [Embodiment] The first ® is a Japanese-style shout婉蜒(四) Antenna - an embodiment comprising: a system 揍 ground 10; a loop of radiating metal sheet u having a starting end m and a - end 112, located on the ground plane 10 of the system, and comprising - a - radiating portion 12, - a second (four) portion 13 and a third light-emitting portion 14'. The first radiating portion 12 is substantially a metal thin piece of a filament, one end of which is a starting end m of the loop radiating metal sheet ^, the second spoke The illuminating portion 13 is also substantially a long straight metal piece, and is substantially bilaterally symmetric with the first body Y portion 12 on both sides of the loop radiating metal piece n, and one end of the second radiation 13 is The loop radiates the end 112 of the metal piece n, and the second radiating portion 14 is formed of a uniform metal thin piece and has a starting end 141 and an end 142. The starting end 141 is connected to the first radiating portion 12 Radiating the other end 121 of the starting end m of the metal piece u with respect to the loop, and the end 142 is substantially facing the phase The direction opposite to the starting end 141 extends in a meandering manner and is connected to the other end 200812150 m of the second radiating portion 13 with respect to the end 112 of the loop radiating metal piece u, a shorted metal piece 15, one end thereof Electrically connected to the end 112 of the loop radiating metal sheet 11, and the other end is electrically connected to the system ground plane 10, the short metal strip 15 is a strip-shaped metal sheet body, and has a uniform line width; The signal component is located between the ground plane 10 of the system and the radiating metal piece U of the loop, and includes a feed signal source 16 and a feed metal piece 17, and one end of the feed metal piece 17 is electrically connected to the loop The starting end m of the radiating metal sheet 11 is connected to the feed-in signal source 16' which feeds the metal sheet 17 and has a uniform line width. Figure 2 is a top view of a conventional loop antenna with a frequency ratio of approximately 1:2:3 in its resonant mode (half-wavelength mode, full-wavelength mode, and 15-wavelength mode). Fig. 3 is a graph showing the results of the experimental measurement of the return loss of one embodiment of the antenna of the present invention. In this embodiment, the system ground plane 1〇 has a length of about 100 mm and a width of about 45 mm; the length of the loop radiating metal piece η is substantially 178 mm, which is close to a half wavelength of 900 MHz. And by appropriately radiating the metal sheet 11 by the loop, the third resonant mode 33 (1.5 wavelength mode) of the loop antenna can be adjusted very close to the second resonant mode 32 (full Wavelength mode), which in turn forms a wide frequency operation in the high frequency band. The experimental results obtained from the actual measurement, under the meaning of return loss less than 7.3 dB, the antenna impedance bandwidth can cover the wireless mobile communication system.
GSM (890〜960 MHz)、DCS (1710〜1880 MHz)及 PCS (1850〜1990)之三頻操作需求。 第4圖為本發明之内藏式蜿蜒迴圈天線的第一其他 實施例平面展開圖，其中該迴圈輻射金屬片丨丨之第三輕 9 200812150 射44由一不均勾金屬細片婉蜒而成。第5圖為本㈣之 内藏式蜿蜒迴圈天線的第二1他竇 ’’、、表月 ，、他實^例平面展開圖，直 中該短路金屬片55及饋入金屬片57為不均勾線寬。第： 圖為本發明之内藏式蜿蜒迴圈天線的第三其他實施例平 面展開圖，其中該迴圈輻射金屬片u以印刷或蝕刻技術 形成於-介質基板6G上。第4〜6圖之三個其他實施例均 可以達成與本發明說明中第丨圖之實施例相似之多頻操 作特性。 以上说明中所述之實施例僅為說明本發明之原理及 功效，而非限制本發明。因此，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 發明之權利範圍如後述之申請專利範圍所列。 200812150 ，【圖式簡單說明】 ^ 第1A圖為本發明之内藏式蜿蜒迴圈天線一實施例之上 視圖。 第1B圖為本發明之内藏式蜿蜒迴圈天線一實施例之侧 視圖。 第1C圖為第1A圖之天線展開為一平面之結構圖。 第2圖為一傳統迴圈天線之上視圖。 第3圖為本發明天線之一實施例的返回損失實驗量測結 果圖。 第4圖為本發明之内藏式蜿蜒迴圈天線的第一其他實施 例平面展開圖。 第5圖為本發明之内藏式蜿蜒迴圈天線的第二其他實施 例平面展開圖。 第6圖為本發明之内藏式蜿蜒迴圈天線的第三其他實施 例平面展開圖。 11 200812150 ’ 【主要元件符號說明】 10 :系統接地面Tri-band operation requirements for GSM (890 to 960 MHz), DCS (1710 to 1880 MHz), and PCS (1850 to 1990). 4 is a plan development view of a first other embodiment of the built-in loop antenna of the present invention, wherein the third light of the loop radiating metal sheet is 9 200812150, and 44 is an uneven metal strip. It’s made. Figure 5 is the second 1st sinus'' of the built-in loop antenna of (4), the moon, and the plane development diagram of the actual example. The short-circuited metal piece 55 and the feed metal piece 57 are directly connected. Uneven hook line width. Fig.: Fig. is a plan view showing a third embodiment of the built-in loop antenna of the present invention, wherein the loop radiating metal sheet u is formed on the dielectric substrate 6G by printing or etching. The three other embodiments of Figures 4 through 6 can achieve multi-frequency operating characteristics similar to the embodiment of the first embodiment of the present invention. The embodiments described in the above description are merely illustrative of the principles and functions of the invention and are not intended to limit the invention. Therefore, those skilled in the art can make modifications and changes to the above embodiments without departing from the spirit of the invention. The scope of the invention is set forth in the appended claims. 200812150, [Simple Description of the Drawings] ^ Figure 1A is a top view of an embodiment of a built-in loop antenna of the present invention. Fig. 1B is a side elevational view of an embodiment of a built-in loop antenna of the present invention. Fig. 1C is a structural diagram in which the antenna of Fig. 1A is expanded into a plane. Figure 2 is a top view of a conventional loop antenna. Figure 3 is a graph showing the return loss experimental measurement results for an embodiment of the antenna of the present invention. Fig. 4 is a plan development view showing a first other embodiment of the built-in loop antenna of the present invention. Fig. 5 is a plan view showing a second embodiment of the built-in loop antenna of the present invention. Fig. 6 is a plan view showing a third embodiment of the built-in loop antenna of the present invention. 11 200812150 ’ [Main component symbol description] 10 : System ground plane
11 111 112 121 131 迴圈輻射金屬片 迴圈輻射金屬片之起始端 迴圈輻射金屬片之末端 迴圈輻射金屬片之第一輻射部 第一輻射部相對於該迴圈輻射金屬 ill的另一端 片之起始端 ••迴圈輻射金屬片之第二輻射部分 :第二輻射部相對於該迴_射金屬 112 14, 44 :迴圈輻射金屬片之第三輻射部 141 :迴圈輻射金屬片之第三輻射部2起山 142 :迴圈輻射金屬片之第三輻射部£ =端 15^ 55 ••短路金屬片末柒11 111 112 121 131 Loop radiant metal sheet loops the starting end of the radiating metal sheet. The end of the radiating metal sheet. The end of the radiating metal sheet. The first radiating portion of the first radiating portion is opposite to the other end of the loop radiating metal ill. The starting end of the sheet • The second radiating portion of the loop radiating metal piece: the second radiating portion with respect to the back-spraying metal 112 14, 44: the third radiating portion 141 of the loop radiating the metal piece: the radiating metal piece of the loop The third radiating portion 2 is from the mountain 142: the third radiating portion of the loop radiating metal piece £=end 15^55 • Short circuit metal piece
16 :饋入信號源 17,57 :饋入金屬片 21 :傳統迴圈輻射金屬片 31 :第一共振模態 32 :第二共振模態 33 •第二共振模態 60 :介質基板 1216: Feed signal source 17, 57: Feed metal sheet 21: Conventional loop radiation metal sheet 31: First resonance mode 32: Second resonance mode 33 • Second resonance mode 60: Dielectric substrate 12