201042831 六、發明說明： ' 【發明所屬之技術領域】 ' 本發明涉及一種天線及具有該天線的檇帶型電子裝 置，尤其涉及一種平面倒F天線（Planar Inverted-F Antenna，PIFA)及具有該ip·面倒F天線的搞帶型電子裝置。 【先前技術】 在行動電話、個人數位助理（Personal Digital Assistant，PDA)等檇帶逛電子裝置普及的今天，其功能、 ^ 外觀造型、成本成了行動電話終端市場競爭的主要焦點， 如何較低成本和減少各個部件的體積成為行動電話終端 設計之方向。 隨著檇帶型電子裝置的體積逐漸縮小，使得其内部用 於裝設各電子元器件之空間越來越有限，而檇帶型電子裝 置功能卻不斷增加，從而使得裝設於檇帶型電子裝置内之 各電子元器件日趨小型化。天線作為檇帶型電子裝置收發 ❹無線訊號的重要元件，其小变化製造技術具有重要之價 值。習知技術通常採用貼片式的PIFA天線’請參閱圖1， 習知的PIFA天線10設於〆電路板14上，其包括一天線 輻射體11、一饋入點12、^接地點13 ’所述天線輻射體 11、饋入點12和接地點13均為導電材料製成之片體，所 述饋入點12和接地點13 "***細1垂直連接於所述輕射體， 另一端均垂直連接於所述電路板14，根據PIFA天線的特 性’為獲得較佳的訊號收發效果，故天線輻射體需與 電路板14保持—定距離。以工作頻率為常用的2.4GHz為 3 201042831 例，所述天線輻射㈣與印製電路板14的㈣至少 達到4mm以上’而且該空間不能容納其他零件，否= 影響天線性能。顯然，該天線需要佔用較大钟 不利於檇帶型電子裝置的小型化。 、"工间’ 【發明内容】 線。㈣於此’有必要提供-種佔用體積較小之峨天201042831 VI. Description of the Invention: 'Technical Fields of the Invention>> The present invention relates to an antenna and a piggyback type electronic device having the same, and more particularly to a Planar Inverted-F Antenna (PIFA) and having the same The ip-face inverted F antenna is a tape-type electronic device. [Prior Art] Today, mobile phones, personal digital assistants (PDAs), etc., have become popular, and their functions, appearance, and cost have become the main focus of competition in the mobile phone terminal market. Cost and reduced volume of individual components have become the direction of mobile phone terminal design. As the size of the tape-type electronic device is gradually reduced, the space for installing various electronic components is becoming more and more limited, and the function of the tape-type electronic device is increasing, thereby enabling the installation of the tape-type electronic device. The electronic components in the device are becoming smaller and smaller. The antenna is an important component of the wireless signal transmission and reception of the strap type electronic device, and its small change manufacturing technology has an important value. Conventional techniques generally employ a patch-type PIFA antenna. Referring to FIG. 1, a conventional PIFA antenna 10 is disposed on a circuit board 14, which includes an antenna radiator 11, a feed point 12, and a grounding point 13'. The antenna radiator 11, the feeding point 12 and the grounding point 13 are all sheets made of a conductive material, and the feeding point 12 and the grounding point 13 "***1 are vertically connected to the light projecting body The other end is vertically connected to the circuit board 14. According to the characteristics of the PIFA antenna, in order to obtain a better signal transceiving effect, the antenna radiator needs to be kept at a fixed distance from the circuit board 14. The operating frequency is the commonly used 2.4 GHz as 3 201042831. The antenna radiation (4) and the printed circuit board 14 (four) at least 4 mm or more 'and the space can not accommodate other parts, no = affect the antenna performance. Obviously, the antenna needs to occupy a large clock, which is not conducive to the miniaturization of the tape-type electronic device. , "Workshop' [Invention content] Line. (d) This is necessary to provide - a small amount of occupied days
G Ο 另外，還有必要提供-種具有所述？ 型電子裝置。 天線之檇可 一種PIFA天線，包括一輕射辦 號饋入部，所述刪為一呈=之:接地部以及-訊 分表一 所述二:r:= 第一折疊部’所述第—折疊部連接且口 置 第二折疊部與第-折疊部連接且平〜认认射體’所述 里.&、丄、α 一… 千订於所述輻射體設 磁波訊號G Ο In addition, is it necessary to provide - with the stated? Type of electronic device. The antenna can be a PIFA antenna, including a light-weight device feed-in portion, and the deletion is one of the following: the grounding portion and the -score meter one of the two: r:= the first folding portion' The folding portion is connected and the second folding portion is connected to the first folding portion and is flat and recognizable to the 'body', the amp, the 一, the α1, and the magnetic wave signal is set in the radiator
PIFA -種搞帶型電子裝置，包括—電 天線，所述PIFA天線括一輻射體、— 及 饋入部’所述輻射體為—呈平板狀之電路及一訊號 表面上設有一輕射區.& 板模、、且，其部分 置並通過所述接地部及職路主板設 連接；所述接地部包括-第-折㈣和主板電性 一折疊部連接於所編體，；述第：，部，所 折豎部連接，且固定 所过弟一折疊部與第一 疋於所述電路主板上，·所述訊號饋入部 201042831 連接於所逃麵射體上，其用以接收電磁波訊號。 相較於習知技術，本發明利用一電路板模組作為 輻射體，利用一接地部’並通過加入一訊號饋入部構成二 域有效的料了現有技射天線安裝所需的 較大玉間之問題，實現了檇帶型電子裝置小型化之需求。 【實施方式] ❹ 〇 耸係本發明錄實施例設置於行動電話、pda 的PIFA天線8°。所述天線8。 電路主板Γ 其平行設於所•㈣電子裝置的一 電路主板30上，所述piFA天線8 接地部84和一訊號饋入部86 田射體82、 部從的1均連接於所述輻射體^地部84和訊號饋入 路主板30相連接。 82,另一端均與所述電 其包=ΐΓΓ為現有的檇帶型電子裝置電路板， 声(Bottom L、:mlyer)32和—與所逑頂層32相對的底 =Μ圖未示)，所述頂層32上設置若干電子 所述輻射體82為一呈平. 為一設於所㈣帶型電的電路板模組，其主體A PIFA-type electronic device includes an electric antenna, the PIFA antenna includes a radiator, and the feeding portion is a flat-shaped circuit and a light-emitting region is disposed on a signal surface. And a part of the board is connected and connected through the grounding portion and the main board; the grounding portion includes a -th-fold (four) and a main board electrical-folding portion connected to the body; The part is connected to the vertical portion, and the folded portion and the first side of the circuit board are fixed on the circuit board. The signal feeding part 201042831 is connected to the escaped surface body for receiving electromagnetic waves. Signal. Compared with the prior art, the present invention utilizes a circuit board module as a radiator, and utilizes a grounding portion 'and forms a two-field effective material by adding a signal feeding portion to prepare a larger jade for the installation of the existing technical antenna. The problem has realized the need for miniaturization of the ribbon type electronic device. [Embodiment] ❹ 〇 The system of the present invention is set to 8° on the PIFA antenna of the mobile phone and pda. The antenna 8. The circuit board 平行 is disposed in parallel on a circuit board 30 of the electronic device, the piFA antenna 8 grounding portion 84 and a signal feeding portion 86, the field body 82, and the portion 1 are connected to the radiator body ^ The ground portion 84 is connected to the signal feed path main board 30. 82, the other end is the same as the electric package = ΐΓΓ is the existing ribbon type electronic device circuit board, the sound (Bottom L, : mlyer) 32 and - the bottom opposite the top layer 32 is not shown) The top layer 32 is provided with a plurality of electrons. The radiator 82 is flat. It is a circuit board module disposed on the (four) strip type electric power, and the main body thereof
Circuit Board，PCB)，所述輕射 2 刷電路板（Pnnted 3〇設置，㈣^於所述電路主板 路主板3G電性連接 1人部86與所述電 和-與所述第-平面822位^ 且伯對之第二平面824，該第 5 201042831 • -平=822和第二平面824均與所述電路主板3〇平行， 所述第平面822與所述所述頂層32相背設置，其上可 X置若干按钮825和若干發光二極體（Light-Emitting D1〇de，LED)826 ’所述第二平面824與所述頂| 32相對 «•又置’其為一電性連接面，可通過電子元件與所述電路主 板30電1±連接。所述輕射體82的部分表面上還設有一裸 露的由導電材料如銅、銀、導電油墨等形成之輻射區828， 〇所述輻射區828在所述PIFA天線s〇t起輕射作用，且通 過改變所述輻射區828之面積和所述訊號饋入部86連接 於所述輻射體82之位置，可實現所述piFA天線8〇的阻 抗匹配以及工作頻段之調整。 所述接地部84為一設於所述檇帶型電子裝置邊緣之 軟性印刷電路板(Flexible Printed Circuit Board，FPCB)， 其包括一第一折疊部842和一第二折疊部844，所述第一 折疊部842為一大致彎折呈倒L形狀之片體，其垂直於所 〇 述輻射體82設置’所述第一折疊部842的較短端平行地 連接於所述輻射體82的第二平面824且與所述第二平面 824電性連接，其較長端沿與該較短端垂直之方向向所述 電路主板30延伸。所述第二折疊部844為一水準片體， 平行地固定在所述電路主板30的底層立與電路主板30電 性連接，所述第一折疊部842的較長端蜜直地連接在第二 折疊部844外側並與其建立電性連接。所述第二折疊部844 包含一接地點848,所述接地點848與所述電路主板30電 性連接，且在所述HFA天線80中起接地作用。 6 201042831 所述訊號饋入部86為1狀體，其-端垂直連接於 ’與所述輕射禮82的第二平面824且與所述第二平面824 -電性連接，另一端垂直地固定於所述電路主板30的頂層 32上且與所述電路主板30電性連接，且所述訊號饋入部 86平行於所述接地部84之第—折疊部842之較短端，所 述訊號饋入部86之長度約為4 9mm。 在貝際應I所述_帶型電子裝置中安裝所述 PIFA天線80日寺所述輕射體82可靠近搞帶塑電子裝置殼 體一内表面設置，其第一平面822上設置的按鈕825和 咖826可以露出歸型電子裝置殼體之外而發揮作用。 所述接地部84可設於搞帶型電子裝置-側面的邊緣，且 所述第一折疊部842長度可與携帶型電子裝置厚度-致， 即可圍繞搞帶型電子襄置外緣設置，藉此可以節省裝設空 間，有利於檇帶型電子裝置的小型化。 ，所述PIFA天線80工作時’訊號自訊號饋入部祁進 Ο入後/α所述PIFA天線80的輻射體82傳輸，此時，所 述輻射區828起輻射作用，所述第二折疊部844的接地點 848為所述HFA天線80提供接地，從而使得所述PIFA天 線80滿足於2.4GHz頻率下進行工作的要求。 天線增益是指在輪入功率相等的條件下，實際天線與 理想的輻射單元在空間同一點處所產生的訊號的功率密 度之比。它定量地描述一個天線把輸入功率集中輻射的程 度。當適當改變所述輻射區828之面積和所述訊號饋入部 86連接於所述輻射體82之位置，可以得刻不同的工作頻 7 201042831 率，請參閱表一，由實驗測得本發明較佳實施例所示的 PIFA天線80的增益隨著工作頻率變化的情況，當工作頻 率為2.4GHz時，所述PIFA天線80之增益為-3.346dB ; 當工作頻率為2.45GHz時，所述PIFA天線80之增益為 -2.057dB ;當工作頻率為2.5GHz時，所述I>IFA天線80 之增益為-2.902dB。 表一本實施例所示的PIFA天線80之增益隨工作頻 率的變化 _Circuit Board, PCB), the light-emitting 2 brush circuit board (Pnnted 3〇 setting, (4) ^ on the circuit board main board 3G electrically connected 1 person 86 with the electric sum - and the first plane 822 a second plane 824, and a fifth plane 824, which is parallel to the circuit board 3〇, and the second plane 824 is disposed opposite to the top layer 32. The second plane 824 can be placed on the button 825 and the plurality of light-emitting diodes (LED) 826'. The second plane 824 is opposite to the top | 32. The connecting surface can be electrically connected to the circuit board 30 by electronic components. A portion of the surface of the light projecting body 82 is further provided with a bare radiation region 828 formed of a conductive material such as copper, silver, conductive ink or the like. The radiation region 828 is lightly acted upon by the PIFA antenna s〇t, and by changing the area of the radiation region 828 and the position of the signal feeding portion 86 connected to the radiator 82, the The impedance matching of the piFA antenna 8 以及 and the adjustment of the operating frequency band. The grounding portion 84 is provided at the 檇A flexible printed circuit board (FPCB) comprising a first folded portion 842 and a second folded portion 844, the first folded portion 842 being substantially bent in an inverted L shape a sheet that is disposed perpendicular to the illustrated radiator 82. The shorter end of the first folded portion 842 is connected in parallel to the second plane 824 of the radiator 82 and is electrically connected to the second plane 824. The connection has a longer end extending toward the circuit board 30 in a direction perpendicular to the shorter end. The second folded portion 844 is a leveling piece that is fixed in parallel to the bottom layer of the circuit board 30. The main board 30 is electrically connected, and the longer end of the first folded portion 842 is directly connected to and electrically connected to the outside of the second folded portion 844. The second folded portion 844 includes a grounding point 848. The grounding point 848 is electrically connected to the circuit board 30 and acts as a grounding function in the HFA antenna 80. 6 201042831 The signal feeding portion 86 is a 1-shaped body, and its end is vertically connected to the light beam. a second plane 824 of the ceremony 82 and the second plane 824 - electricity The other end is vertically connected to the top layer 32 of the circuit board 30 and electrically connected to the circuit board 30, and the signal feeding portion 86 is parallel to the first folding portion 842 of the ground portion 84. The shorter end, the length of the signal feeding portion 86 is about 49 mm. The PIFA antenna is installed in the band-type electronic device described in the first embodiment of the invention. The light projecting body 82 can be close to the plastic electronic device. An inner surface of the device housing is disposed, and the button 825 and the coffee cup 826 disposed on the first plane 822 can function outside the housing of the homing electronic device. The grounding portion 84 can be disposed on the edge of the side of the tape-type electronic device, and the length of the first folded portion 842 can be set to be the thickness of the portable electronic device, and can be disposed around the outer edge of the tape-type electronic device. Thereby, the installation space can be saved, which is advantageous for miniaturization of the tape-type electronic device. When the PIFA antenna 80 is in operation, the signal is transmitted from the radiation body 82 of the PIFA antenna 80 after the signal feed portion is intruded, and the radiation region 828 acts as a radiation, and the second folded portion A ground point 848 of 844 provides grounding for the HFA antenna 80 such that the PIFA antenna 80 satisfies the requirements for operation at a frequency of 2.4 GHz. The antenna gain is the ratio of the power density of the signal generated by the actual antenna at the same point in space as the ideal radiating element under the condition of equal wheel power. It quantitatively describes the extent to which an antenna concentrates the input power. When the area of the radiation area 828 and the position of the signal feeding part 86 are connected to the radiator 82, the operating frequency of the different frequency can be obtained. Please refer to Table 1, and the invention is experimentally measured. The gain of the PIFA antenna 80 shown in the preferred embodiment varies with the operating frequency. When the operating frequency is 2.4 GHz, the gain of the PIFA antenna 80 is -3.364 dB; when the operating frequency is 2.45 GHz, the PIFA The gain of the antenna 80 is -2.057 dB; when the operating frequency is 2.5 GHz, the gain of the I>IFA antenna 80 is -2.902 dB. Table 1 shows the gain of the PIFA antenna 80 shown in this embodiment as a function of the operating frequency.
Frequency (MHz) 2400 2450 2500 Gain(dB) -3.346 -2.057 -2.902 圖3所示係本發明較佳實施例進行電壓駐波比 (Voltage Standing Wave Ratio，VSWR)測試之結果分析圖。 一般而言，電壓駐波比在2dB以下即視為接受率良好。如 圖3所示，實驗測得當所述pifa天線工作頻率為 2.4GHz時’電壓駐波比為udB ;當所述PIFA天線80工 q 作頻率為2.45GHz時’電壓駐波比為1.15dB;當所述PIFA 天線80工作頻率為2.5GHz時，電壓駐波比為i.4dB，故 所述PIFA天線80為理想之平面倒F天線。 综上所述，本發明符合發明專利要件，爰依法提出專 淨J申咕准以上所述者僅為本發明之較佳實施例，本發 明之範圍並不以上述實施例為限，舉凡熟悉本案技藝之人 士援依本發明之精神所作之等效修飾或變化，皆應涵蓋於 以下申請專利範圍内。 8 201042831 【圖式簡單說明】 圖1係習知PIFA天線之結構示意圖； 圖2係本發明較佳實施例PIFA天線連接於電路主板 上之使用狀態示意圖； 圖3係本發明較佳實施例PIFA天線在不同頻率下之 電壓駐波比示意圖。 【主要元件符號說明】Frequency (MHz) 2400 2450 2500 Gain (dB) -3.346 -2.057 - 2.902 Figure 3 is a graph showing the results of a voltage standing wave ratio (VSWR) test in accordance with a preferred embodiment of the present invention. In general, a voltage standing wave ratio of 2 dB or less is considered to be a good acceptance rate. As shown in FIG. 3, the experiment shows that the voltage standing wave ratio is udB when the pifa antenna operating frequency is 2.4 GHz; and the voltage standing wave ratio is 1.15 dB when the PIFA antenna 80 is used at 2.45 GHz; When the PIFA antenna 80 operates at a frequency of 2.5 GHz, the voltage standing wave ratio is i.4 dB, so the PIFA antenna 80 is an ideal planar inverted-F antenna. In summary, the present invention complies with the requirements of the invention patents, and the above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited to the above embodiments. Equivalent modifications or variations made by those skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims. 8 is a schematic diagram of a conventional PIFA antenna; FIG. 2 is a schematic view showing a state in which a PIFA antenna is connected to a circuit board according to a preferred embodiment of the present invention; FIG. 3 is a preferred embodiment of the present invention. Schematic diagram of the voltage standing wave ratio of the antenna at different frequencies. [Main component symbol description]
PIFA天線 10 天線輻射體 11 饋入點 12 接地點 13 電路板 14 電路主板 30 頂層 32 電子元件 33 PIFA天線 80 輻射體 82 第一平面 822 第二平面 824 按鈕 825 發光二極體 826 幸虽射區 828 接地部 84 第一折疊部 842 第二折疊部 844 接地點 848 訊號饋入部 86 9PIFA antenna 10 Antenna radiator 11 Feed point 12 Ground point 13 Circuit board 14 Circuit board 30 Top layer 32 Electronic components 33 PIFA antenna 80 Radiator 82 First plane 822 Second plane 824 Button 825 Light-emitting diode 826 Fortunately, the shot area 828 Grounding portion 84 First folding portion 842 Second folding portion 844 Grounding point 848 Signal feeding portion 86 9