1223470 玫、發_說明 (發明說明應敘明：發明所屬之技術領域、先前技術、內容、實施方式及圖式簡單說明） (一） 發明所屬之技術領域 本發明係泛指一種天線，尤指一種多頻帶之平面倒F天 線。 (二） 先前技術 平面倒F天線（PIFAs)係使用於無線電通信中，亦即：行 動電話、無線式個人數位助理器（P D A s )、無線式區域性網絡 (LANs) -藍芽，等。一般，PIFA包括·一具有一第1區域之平 面輻射元件，及一具有平行該輻射元件第1區域之第2區域 的接地面。一電氣導通之第1線係在一第1接點處耦合於該 輻射元件，而該第1接點則係位在輻射元件一側之一緣部者 。該第1線亦耦合於接地面。一電氣導通之第2線係循沿第 1線相同側而耦合於輻射元件，惟係在不同於第1線之緣部 上的接點位置。第1及第2線均配設成p IFA動作頻率時所 希之阻抗阻’亦即’ 50歐姆。PIFA中，第丨及第2線係垂 直於輻射兀件之緣部，故可對緣部作耦合，因之，乃形成爲 倒F形狀（故本案乃稱之爲”平面倒ρ天線”）。 通常’ P IF A之諧振頻率係由輻射元件之面積所決定，且 隨者輻射元件與接地面間之距離（p〗F A組合之厚度）而變弱 。PIFA之頻帶寬由PIFA組合之厚度及輻射元件與接地面間 之電氣性耦合所決定。設計實用之piFA應用所面臨之最大 困擾係無法兼得所希之動作頻帶寬暨減小piFA之體積（面 積X厚度）。又者，最好是具有較大之接地面面積（屏蔽卜 1223470 因爲有助於減少例如由行動電話可能傳入人腦之無線電頻 率（S A R値=特定吸收率）。但除非減少厚度（輻射元件及接地 面面積間之距離），否則較大之接地面面積將使PIFA之體 積變大。 由於無線通信應用之數量增加，且無線設備之物理大小 變小，故而該等通信及設備乃須使用各種較小之天線。傳 統之平面倒F天線在所賦予之無線應用下，因須減小PIF A 之體積（厚度），故犧牲了頻帶寬。 此外，不同之地域係使用不同之動作頻率。例如，最近在 北美地域之新GSM頻帶爲8 5 0MHz。則自歐洲系統GS M 900MHz 之既有PIF天線即須加以作適當之配合，例如，將諧振頻率由 9 0 0MHz轉移爲8 5 0MHz。如是，乃希望在以最少之設計變更 下，可重新設計用於各種不同頻率之無線通信產品。 但是，爲了在較低之諧振頻率使用相同之天線種類，則 須變更天線之物理尺寸。舉例而言，一原本設計用於9 0 0MHz 之PIFA尺寸即須藉乘以850/900而定尺寸以操作於850MHz 。故顯然的，此種P I F天線之尺寸必大於8 5 0 M H z之p 1 F天 線尺寸。因之，重新設計用於不同頻率之產品時，即將產 生重新設計各天線之問題。 因爲，在設計一種可在不同諧振頻率動作之PIFA時’即 要求不增大其尺寸。 (三）發明內容 本發明係爲解決前述既有技術領域所存在之問題’缺失 等，而提供一種可增進PIFA有用頻帶寬之設備及系統。 -6- 1223470 等，而提供一種可增進PIFA有用頻帶寬之設備及系統。 依本發明之一可行實施例，所提供之天線係包括一接地 面及一輻射元件。接地面具有一第1平面及一第1區域， 而輻射元件具有一第2平面及一第2區域。輻射元件之第2 平面與接地面之第1平面兩者實質地平行，且該第2區域 包括一曲折形區段，係延伸輻射元件之有效總長度。 本發明之特點及優異之處，將佐以如下之附圖並配合實 施例之說明而更爲顯見。 (四）實施方式 根據本發明之一代表性實施例，天線係包括一接地面及 一輻射元件。接地面具有一第1平面及一第1區域及輻射 元件具有一第2平面及一第2區域。輻射元件之第2平面 與接地面之第1平面兩者實質地平行，且第2區域包括一 延伸於輻射元件有效總長度之曲折形區段。天線可再包括 一第1連接線及一第2連接線。第1連接線係耦合於接地 面之一第1緣部及在第1接點位置耦合於輻射元件之一第2 緣部，而第2連接線則係在一第2及一第3接點位置耦合 於輻射元件的第2緣部。接地面之第1區域可大於或實質 相同於輻射元件之第2區域。第1接點位置可位於第2及 第3接點位置之間。又者，第2連接線可在複數個接點位 置耦合於輻射元件的第2緣部。第1及第2連接線可予配 設爲所希之阻抗’例如可爲5 0歐姆。輻射元件之第2區域 包括一第1及一第2區段，其中兩區段中之一者可包括至 少一延伸該區段有效電性長度之副區段，而另一區段則爲 1223470 一種L形。曲折形可爲正弦波形、三角波形、或其他適當 波形之形狀。接地面可位在絕緣基板之一側，而輻射元件 可位在絕緣基板之另側。又者，接地面、絕緣基板及輻射 兀件均可爲撓性。接地面之第丨區域及輻射元件之第2區 域可爲矩形或非矩形。 平面倒F天線之另一實施例係包括一接地面及一輻射元 件。接地面具有一第〗平面及一第丨區域，而輻射元件則 具有一第2平面及一第2區域。輻射元件之第2平面與接 地面之第1平面兩者係實質地平行，且第2區域包括一延 伸幅射兀件有效長度之曲折形區段。天線亦包括一第1連 接線’係耦合於接地面之緣部及輻射元件之一緣部，以及 一第2連接線’係耦合於第1連接線耦合於該處、位於輻 射元件任何一側，之緣部。 再一實施例之平面倒F天線係包括一接地面及一輻射元 件。接地面具有一第〗平面，一第1圓周，及在該第1圓 周上之第1複數個緣部，而輻射元件具有一第2平面，一 第2圓周’及在該第2圓周上之一第2複數個緣部，該輻 射元件之第2平面與該接地面之第丨平面係實質地平行， 且該第2區域係包括一延伸輻射元件之有效長度，具有曲 折开之E lx ’該天線亦具有一第1連接線，親合於該第j 複數個緣部中之第1緣部及該第2複數個緣部中之第1緣 部，及一第2連接線，耦合於位在該第Ϊ連接線任何一側 上之該第2複數個緣部中的第1緣部。 1223470 又一實施例係一種具有平面倒 F天線（PIFA)之無線電系 ， 統，該系統包含一接地面及一輻射元件。接地面具有一第1 、 平面及一第1區域，而輻射元件具有一第2平面及一第’ 2區域。輻射元件之第2平面與接地面之第1平面兩者係實— 質地平行，且第2區域包括一延伸輻射元件有效總長度之 曲折形區段。此系統尙包括一第1連接線，耦合於接地面 之第1緣部及在第1接點位置耦合於輻射元件的一第2緣 部，以及一第2連接線，其係在第2及第3接點位置處耦 合於輻射元件的第2緣部，該第1及第2連接線係在所希 阻抗處親合於一無線電。 以下，即就附圖詳細說明本發明之實施例。第1圖係習 用技術之平面倒F天線（PIFA)槪略圖。習用技術之PIFA以 符號100表示。PIFA包括一輻射元件1〇2; —接地面1〇4; 一第1連接線1 1 〇，係在接點位置1 〇 8耦合於輻射元件丨〇 2 ，及一第2連接線1 1 2，係在接點位置1 〇 6親合於輻射元件 1 0 2。第1連接線1 1 〇藉連接件1丨6亦耦合於接地面1 〇 4。 兩連接線1 1 〇及1 1 2係配設成可經由兩連接件丨丨4、丨丨6而 可鍋合於無線電系統（未不）。連接件1 1 4、1 1 6 —般係配設 成所希之阻抗’亦即’ P IF A之動作頻率下爲5 〇歐姆。連接 件1 1 4通常爲”熱”連接件，而連接件丨i 6通常則爲接地之連 接件。 如桌2 @所不’係依本發明平面倒f天線（p I f a ) —代表 性實施例之槪略圖。PIFA以符號2〇〇表示。pIFA2〇〇包括 1223470 一輻射元件2 0 2 ; —接地面2 0 4 ; —第1連接 接點位置2 0 8耦合於輻射元件2 0 2 ;及一第2 係在接點位置2 0 6、2 1 8耦合於輻射元件2 0 2 2 1 0經耦合線2 1 1亦耦合於接地面2 0 4。兩連接 係配設成可經由兩連接件2 1 4及2 1 6而可耦 統（未示）。連接件2 1 4及2 1 6通常係配設成所 即，在PIFA 2 0 0之動作頻率之下，爲20、51 至3 0 0歐姆。連接件2 1 4通常爲”熱”連接件， 通常則爲接地連接件。在多個接點位置（2 0 6、 射元件202可擴增PIFA 200之頻帶寬。依所 輻射元件2 0 2係包括兩個區段2 4 0及2 5 0。區 副區段2 3 0，此一副區段爲一曲折形構造，之 一區段2 5 0。 通常，諧振頻率係由輻射元件202之面積所 之頻帶寬則由厚度，亦即輻射元件202及接;t 距離所決定。進者，欲使諧振頻率降低，勢 度，易言之，即是要加大天線之外形尺寸。女丨 之多頻式PIFA實質上係包含兩個不同之區段 矩形區段240，另一爲L形區段250。各區段 諧振頻率。因之，此種天線可支援兩種頻帶 係作’’熱”連接件2 1 4曁輻射元件2 0 2間之連接 個天線元件。藉此種連接，兩天線元件係依 〇 依本發明，天線區段2 5 〇中之副區段2 3 〇 線2 1 0，係在 連接線2 1 2， 。第1連接線 ;線 2 1 0 及 2 1 2 、 合於無線電系 希之阻抗，亦 〇、75或自 20 而連接件2 1 6 218)耦合於輻 示之實施例， 段2 5 0包括一 後即延伸至另 決定，而P I F A 面 2 0 4間之 須加長天線長 II第 2圖所示 ，亦即，一爲 具有其本身之 。耦合件 2 2 0 ，更可強化兩 平行的作變換 係有效的延伸 -10- 1223470 區段2 5 G之長度，故可減低諧振頻率而毋須改變天線之全 部尺寸。 第3圖爲依本發明另一實施例之輻射元件頂面圖。此實 施例中’幅射元件係包括兩個分開之天線元件3 4 0、3 5 0而 取代單一元件。第1天線元件3 4 0實質上爲矩形，而第2 元件350實質上爲l形。兩元件340、350可置設成如圖示 之方式’第2之L形元件3 5 〇係部分的框連於第1元件34〇 。接地連接件3 1 5係經一橋式連接件3 1 0和兩天線元件3 4 0 、3 5 0之連接點相耦合。”熱，，連接件3 2 5係經由導線或傳輸 線3 0 0、3 2 0於連接點處耦合於各天線元件3 4 〇、3 5 〇。依本 發明，L形天線元件3 5 〇之設計係包括一副區段3 3 〇，以增 加天線元件3 5 0之有效長度。副區段3 3 0爲曲折形。該種 天線元件之製造可使用沖壓、蝕刻或其他適宜方式對一薄 片金屬加工即成。L形天線元件3 5 0具有用於副區段3 5 〇之 一*有效部分長度d。介由曲折形之應用，有效的電氣性長度 即成爲長度d之數倍，因而可延伸了各天線元件3 5 〇。 第4圖爲依本發明尙一輻射元件之實施例。此實施例中 ’係使用單一金屬薄片，例如，沖壓成實質上之4 4 0及4 5 0 兩個區域。區域4 5 〇具有一曲折形之副區段4 3 〇。僅須單一 之接地連接件4 2 5。此一連接件最好係位設在兩天線元件均 有連接之接點上。”熱，，連接件4 1 5之置設方式與第2圖及第 3圖所示者相同。 天線元件之副區段包括之曲折形構造或形式可爲多種不 同之形狀。但以實質而言，副區段之有效長度係長於此一 -11- 1223470 副區段之物理性長度d以延伸天線元件之有效電氣性長度 者。尙且，毋須額外增加製造過程，因曲折形構造係形成 在輻射元件之平面內。 第5〜7圖係依本發明多頻p〗F a之放射元件諸種不同實 施例。例如，第5 A〜5 D，6 C及6 E等圖係使用正弦波形之 曲折型式而置設於L形天線元件之不同構件中。第5 E〜5 F 圖中係使用三角波形之延伸副區段而置設於L形天線元件 之不同構件中。同時，第6 A、6 B及6 D圖則爲矩形波形之 曲折型式。第6F、7A及7B圖係表示輻射元件中之兩個延 伸的曲折形副區段，其係由不同形狀之兩個曲折形副區段 組合而成者，如第6 F、7 A及7 B圖所示，其係非使用單一 之副區段，而係採用複數之副區段，該等副區段可爲相同 形狀或爲不同形狀所組成，端依所希之諧振頻率而定。 第7 C圖爲本發明之又一實施例。此實施例中，曲折形副 區段係設在實質爲矩形之天線元件內。因之，依接地連接 件之置設方式，可延伸爲L形之元件或延伸爲矩形之元件 〇 可想而知的，亦屬本發明範疇者，乃依本發明係利用在 至少兩個接點位置上耦合於輻射元件係可增加p IFA之頻帶 寬。 接地面及/或輻射元件可具有開孔，亦即，孔洞或切口， 以減輕重量；以及機械支持之附件，亦即，介電絕緣之支 持件’以將接地面及/或輻射元件持住。 本發明並非僅侷限如第5圖至第7圖所示之任何一種形 -12- 1223470 狀、尺寸及/或形式。接地平面及輻射元件可由任何型式之 傳導性金屬製成，亦即，如金屬、金屬合金、飽和布 (impregnated cloth)、具有導電性被覆之膜片等。輻射元件 與接地面間之距離不須恒定。本發明之多接點位置實施例 亦可使用於折曲式天線形體之平面構造中而不致增加製造 成本。 當然’延伸之曲折形副區段的應用並不侷限於多頻帶^ 天線，其亦可用於任何型式之單頻帶天線。依接地及，，熱，連 接件之連接’第7圖所示之天線亦可用於例如作爲單頻帶 之天線者。任何種使用類似於前述多頻帶天線之單頻帶天 線可依本發明所揭示之原理加以修改。 如上述，多頻帶天線中之輻射元件上、各種不同接點位 置之組合可作成多種諧振、密切耦合、”參差調諧（stagger tuned)’’之 PIFA 結構。 藉PIFA輻射元件中之曲折構造的使用，PIF天線之物理 尺寸或外形可保持不變，但可降低諧振頻率。因之’依本 發明即可提供一種較低頻率範圍之PIFA而不須變更機械構 件，或倘不使用本發明，而爲了配合較大之天線外形’將 使得話機之尺寸變大。又者，當不希變更頻率時’既有之 話機的外形可作成更爲扁薄，因爲在一所賦予之動作頻率 下，以相同之動作頻帶寬而言，具有曲折構造之PIF天線 體積自小於未具曲折構造之PIF天線。 本發明業已舉示若干實施例詳述如上，依本發明’用於 系統之參數可加以變化，設計工程師可依所希之應用指定 -13· 1223470 施例，惟應仍屬本發明之專利保護範疇’法理甚明’自不 待多述。 (五）圖式簡單說明 第1圖爲習用技術平面倒F天線（PIFA)之槪略圖。 第2圖爲依本發明第1實施例之平面倒F天線（PIFA)槪 略圖。 第3圖及第4圖爲依本發明其他實施例PIFA之輻射元件 頂面圖。 第5A至5F，6A至6F，及7A至7C圖爲依本發明不同實 施例PIFA之延伸副區段各種形狀頂面圖 主要部分之代表符號說明 1 00 習用 10 2 輻射 1 04 接地 10 6 接點 10 8 接點 110 第1 112 弟2 114 連接 116 連接 2〇〇 平面 202 輻射 204 接地 206 接點 之平面型倒F式天線 元件 面 位置 位置 連接線 連接線 件 件 型倒F式天線 元件 面 位置 -14- 1223470 2 04 接地面 206 接點位置 208 接點位置 2 10 第1連接線 2 11 奉禹合線 2 12 第2連接線 2 1 4 連接件 2 16 連接件 2 18 接點位置 220 第3連接線 230 副區段 240 矩形區段 250 區段 3 00 傳輸線 3 10 橋式連接 3 15 接地連接處 3 20 傳輸線 3 25 ’’熱’’連接處 3 3 0 虽!]區段 3 40,3 5 0 天線元件 4 15 ’’熱’’連接 425 接地連接處 430 副區段 440 區段 1223470 4 5 0 區段 -161223470 Description of the invention (the description of the invention should state: the technical field to which the invention belongs, the prior art, the content, the embodiments and the simple description of the drawings) (1) the technical field to which the invention belongs The invention refers generally to an antenna, especially A multi-band planar inverted-F antenna. (2) Prior Art Planar inverted F antennas (PIFAs) are used in radio communications, that is, mobile phones, wireless personal digital assistants (PDAs), wireless local area networks (LANs)-Bluetooth, etc. Generally, a PIFA includes a planar radiating element having a first region and a ground plane having a second region parallel to the first region of the radiating element. An electrically conductive first wire is coupled to the radiating element at a first contact, and the first contact is located at an edge portion of one side of the radiating element. The first line is also coupled to the ground plane. An electrically conductive second line is coupled to the radiating element along the same side of the first line, but at a contact position different from the edge portion of the first line. The first and second wires are all configured to have impedance resistance 'i.e.' 50 ohms at the p IFA operating frequency. In PIFA, the first and second lines are perpendicular to the edge of the radiating element, so the edges can be coupled. Therefore, it is formed into an inverted F shape (hence the case, it is called a "flat inverted antenna") . Generally, the resonance frequency of ‘P IF A is determined by the area of the radiating element, and it becomes weaker with the distance between the radiating element and the ground plane (the thickness of the combination of p and F A). The frequency bandwidth of PIFA is determined by the thickness of the PIFA combination and the electrical coupling between the radiating element and the ground plane. The biggest problem in designing practical piFA applications is that they cannot achieve the desired operating frequency bandwidth and reduce the volume of piFA (area X thickness). Also, it is best to have a large ground plane area (shield 1223470 because it helps reduce the radio frequency (SAR 値 = specific absorption rate) that may be transmitted to the human brain by a mobile phone, for example. But unless the thickness is reduced (radiating element And the ground plane area), otherwise the larger ground plane area will make PIFA larger. As the number of wireless communication applications increases and the physical size of wireless equipment becomes smaller, these communications and equipment must be used Various smaller antennas. Traditional planar inverted-F antennas have to reduce the size (thickness) of PIF A under the given wireless applications, thus sacrificing frequency bandwidth. In addition, different regions use different operating frequencies. For example, the recent new GSM band in North America is 850 MHz. The existing PIF antenna from the European system GS M 900 MHz must be appropriately matched, for example, the resonance frequency is shifted from 900 MHz to 850 MHz. If so, it is hoped that with minimal design changes, wireless communication products for various frequencies can be redesigned. However, in order to use them at lower resonance frequencies For the same antenna type, the physical size of the antenna must be changed. For example, a PIFA size originally designed for 900 MHz must be multiplied by 850/900 to determine the size to operate at 850 MHz. Obviously, this type of The size of the PIF antenna must be larger than the p 1 F antenna size of 850 MHz. Therefore, when redesigning products for different frequencies, the problem of redesigning each antenna is about to occur. Because, when designing a product that can be used at different resonance frequencies, During the operation of PIFA, it is required not to increase its size. (3) Summary of the Invention The present invention is to provide a device and a system that can improve the useful frequency bandwidth of PIFA in order to solve the above-mentioned problems in the existing technical field. -6- 1223470, etc., to provide a device and system that can improve the useful frequency bandwidth of PIFA. According to a feasible embodiment of the present invention, the antenna provided includes a ground plane and a radiating element. The ground mask has a first plane And a first region, and the radiating element has a second plane and a second region. The second plane of the radiating element and the first plane of the ground plane are substantially parallel, and the second region includes It includes a zigzag section, which extends the effective total length of the radiating element. The features and advantages of the present invention will be more obvious with the following drawings and the description of the embodiments. (4) Implementation mode according to this In a representative embodiment of the invention, the antenna system includes a ground plane and a radiating element. The ground mask has a first plane and a first region and the radiating element has a second plane and a second region. The second of the radiating element The plane is substantially parallel to the first plane of the ground plane, and the second region includes a zigzag section extending over the effective total length of the radiating element. The antenna may further include a first connection line and a second connection line. The 1 connection line is coupled to a first edge portion of a ground plane and the second edge portion of a radiating element at a first contact position, and the second connection line is connected to a second and a third contact position The second edge portion is coupled to the radiating element. The first area of the ground plane may be larger or substantially the same as the second area of the radiating element. The first contact position can be located between the second and third contact positions. In addition, the second connection line may be coupled to the second edge portion of the radiating element at a plurality of contact positions. The first and second connection lines can be arranged to have a desired impedance ', for example, 50 ohms. The second area of the radiating element includes a first and a second section, one of the two sections may include at least one sub-section extending the effective electrical length of the section, and the other section is 1223470 An L-shape. The zigzag shape may be a sine waveform, a triangular waveform, or other suitable waveforms. The ground plane may be located on one side of the insulating substrate, and the radiating element may be located on the other side of the insulating substrate. In addition, the ground plane, the insulating substrate, and the radiation element can be flexible. The second region of the ground plane and the second region of the radiating element may be rectangular or non-rectangular. Another embodiment of the planar inverted-F antenna includes a ground plane and a radiating element. The grounding mask has a first plane and a second region, and the radiating element has a second plane and a second region. The second plane of the radiating element and the first plane of the ground are substantially parallel, and the second region includes a zigzag section extending the effective length of the radiation element. The antenna also includes a first connection line 'coupled to the edge portion of the ground plane and an edge portion of the radiating element, and a second connection line' coupled to the first connection line coupled thereto, located on either side of the radiating element. , The margin. The planar inverted-F antenna of another embodiment includes a ground plane and a radiating element. The grounding mask has a first plane, a first circle, and a first plurality of edges on the first circle, and the radiating element has a second plane, a second circle, and a second circle on the second circle. A second plurality of edges, the second plane of the radiating element is substantially parallel to the first plane of the ground plane, and the second region includes an effective length of an extending radiating element with a zigzag E lx ' The antenna also has a first connection line that is close to the first edge portion of the j plurality of edge portions and the first edge portion of the second plurality of edge portions, and a second connection line that is coupled to A first edge portion of the second plurality of edge portions located on either side of the first connection line. 1223470 A further embodiment is a radio system with a planar inverted F antenna (PIFA). The system includes a ground plane and a radiating element. The ground mask has a first plane, a plane and a first region, and the radiating element has a second plane and a second region. The second plane of the radiating element and the first plane of the ground plane are both solid-the texture is parallel, and the second region includes a zigzag section extending the effective total length of the radiating element. The system 尙 includes a first connection line, a first edge portion coupled to the ground plane and a second edge portion coupled to the radiating element at the first contact position, and a second connection line connected between the second and The third contact position is coupled to the second edge of the radiating element, and the first and second connection lines are compatible with a radio at the desired impedance. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 is a schematic diagram of a planar inverted-F antenna (PIFA) using conventional technology. The PIFA of the conventional technology is represented by the symbol 100. The PIFA includes a radiating element 102;-a ground plane 104; a first connecting line 1 1 0, which is coupled to the radiating element 1 at a contact position 1 08, and a second connecting line 1 1 2 , At the contact position 1 06, affinity to the radiating element 102. The first connecting line 1 1 0 is also coupled to the ground plane 104 by the connecting member 1 丨 6. The two connecting lines 1 1 0 and 1 1 2 are configured to be connected to the radio system via the two connecting pieces 丨 丨 4, 丨 丨 6 (not without). The connectors 1 1 4 and 1 1 6 are generally configured to have the desired impedance, that is, the operating frequency of PIF A is 50 ohms. Connectors 1 1 4 are usually “thermal” connectors, while connectors 丨 i 6 are usually grounded connectors. Table 2 @ 所 不 'is a schematic diagram of a representative embodiment of a planar inverted f antenna (p I f a) according to the present invention. PIFA is represented by the symbol 200. pIFA200 includes 1223470 a radiating element 202;-a ground plane 204;-a first connection contact position 208 is coupled to the radiating element 202; and a second system at the contact position 206, 2 1 8 is coupled to the radiating element 2 0 2 2 1 0 and is also coupled to the ground plane 2 0 4 through the coupling line 2 1 1. The two connections are configured to be coupled (not shown) via two connections 2 1 4 and 2 1 6. The connectors 2 1 4 and 2 1 6 are usually arranged so that they are 20, 51 to 300 ohms below the operating frequency of PIFA 2000. Connector 2 1 4 is usually a "hot" connector, and is usually a ground connector. At multiple contact positions (206, radiating element 202 can amplify the frequency bandwidth of PIFA 200. According to the radiating element 2 0 2 series, it includes two sections 2 4 0 and 2 50. The sub-section 2 3 0, this pair of sections is a zigzag structure, and one section is 2 50. Generally, the resonance frequency is determined by the area of the radiating element 202, and the frequency bandwidth is determined by the thickness, that is, the radiating element 202 and the connection; t distance The decision is made by the person who wants to reduce the resonance frequency, the potential, in other words, to increase the external size of the antenna. The multi-frequency PIFA of females essentially consists of two different rectangular sections 240 The other is the L-shaped section 250. The resonance frequency of each section. Therefore, this antenna can support two frequency bands as a "thermal" connector 2 1 4 曁 radiating element 2 0 2 to connect an antenna element With this kind of connection, the two antenna elements are according to the present invention, and the secondary section 23 of the antenna section 250 is the line 2 10, which is connected to the connection line 2 12. The first connection line; line 2 1 0 and 2 1 2, the impedance corresponding to the radio system Greek, also 0, 75 or since 20 and the connector 2 1 6 218) is coupled to the radiating embodiment, paragraph 2 5 0 includes one and then it is extended to another decision, and the length of the antenna between the PIFA planes 2 and 4 must be extended as shown in the second figure, that is, one has its own. The coupling member 2 2 0 can strengthen two parallels. The transformation is effectively extended to the length of -10- 1223470 section 2 5 G, so the resonance frequency can be reduced without changing the overall size of the antenna. Figure 3 is a top view of a radiating element according to another embodiment of the present invention. In this embodiment, the 'radiating element includes two separate antenna elements 3 4 0 and 3 50 instead of a single element. The first antenna element 3 4 0 is substantially rectangular, and the second element 350 is substantially l-shaped. The two elements 340 and 350 can be arranged as shown in the figure. The frame of the second L-shaped element 3 5 0 series is connected to the first element 34 0. The ground connection 3 1 5 is connected via a bridge connection 3 1 0 is coupled to the connection points of the two antenna elements 3 4 0 and 3 50. "Heat, the connector 3 2 5 is coupled to each antenna element 3 at the connection point via a wire or transmission line 3 0 0, 3 2 0 4 0, 3 5 0. According to the present invention, the design of the L-shaped antenna element 3 500 includes a pair of sections 3 3 0 to increase the effective length of the antenna element 3 5 0. The auxiliary section 3 3 0 is zigzag. The antenna element can be manufactured by stamping, etching or other suitable methods on a thin piece of metal. The L-shaped antenna element 3 50 has one of the sub-segments 3 50 * an effective portion length d. Through the application of the zigzag shape, the effective electrical length becomes several times the length d, so that each antenna element can be extended by 3 5 0. FIG. 4 is an embodiment of a radiating element according to the present invention. In this embodiment, a single metal sheet is used, for example, stamped into two areas of substantially 4 40 and 4 50. The area 4 50 has a zigzag secondary section 4 3 0. Only a single ground connection 4 2 5 is required. This connecting member is preferably located at a contact where both antenna elements are connected. "Heat, the connecting means 4 1 5 are the same as those shown in Figure 2 and Figure 3. The zigzag structure or form included in the auxiliary section of the antenna element can be a variety of different shapes. In other words, the effective length of the sub-section is longer than this 11-1223470 The physical length d of the sub-section extends the effective electrical length of the antenna element. Also, no additional manufacturing process is needed because the zigzag structure system is formed In the plane of the radiating element. Figures 5 to 7 are different embodiments of the radiating element according to the multi-frequency p a Fa of the present invention. For example, Figures 5 A to 5 D, 6 C, and 6 E use sinusoidal waveforms. The zigzag pattern is placed in different components of the L-shaped antenna element. The 5E ~ 5F in the figure are placed in different components of the L-shaped antenna element using the extended sub-section of the triangular waveform. At the same time, the 6th Figures A, 6 B, and 6 D are the meandering patterns of rectangular waveforms. Figures 6F, 7A, and 7B show two extended meandering subsections in the radiating element, which are composed of two meandering auxiliary elements of different shapes. The combination of sections, as shown in Figures 6 F, 7 A and 7 B, is not used A single sub-segment uses plural sub-segments, and the sub-segments can be the same shape or different shapes, depending on the desired resonance frequency. Figure 7C is another example of the present invention. An embodiment. In this embodiment, the zigzag sub-section is provided in a substantially rectangular antenna element. Therefore, depending on the arrangement of the ground connection member, it can be extended into an L-shaped element or a rectangular element. 〇 It is conceivable that those who belong to the scope of the present invention can increase the frequency bandwidth of p IFA by using coupling to the radiating element at at least two contact positions. The ground plane and / or the radiating element may have an open Holes, i.e. holes or cutouts, to reduce weight; and mechanically supported attachments, i.e., dielectric insulating supports, to hold the ground plane and / or the radiating element. The present invention is not limited to only Figure 5 Any of the shapes shown in Figure 7-12-1247047, shape, size and / or form. The ground plane and radiating element can be made of any type of conductive metal, that is, metal, metal alloy, saturated cloth (impregnated cloth), with Electrically-coated diaphragms, etc. The distance between the radiating element and the ground plane does not need to be constant. The multiple contact position embodiments of the present invention can also be used in the planar structure of a bent antenna body without increasing manufacturing costs. Of course ' The application of the extended zigzag sub-section is not limited to multi-band antennas, and it can also be used for any type of single-band antenna. Depending on the ground, heat, and connection of the connector, the antenna shown in Figure 7 can also be used For example, as a single-band antenna. Any kind of single-band antenna similar to the aforementioned multi-band antenna can be modified according to the principles disclosed by the present invention. As described above, the radiating elements in the multi-band antenna have various different contact positions. The combination can be made into a variety of resonant, closely coupled, "stagger tuned" PIFA structures. By using the zigzag structure in the PIFA radiating element, the physical size or shape of the PIF antenna can be maintained, but the resonance frequency can be reduced. Therefore, according to the present invention, a PIFA of a lower frequency range can be provided without changing mechanical components, or if the present invention is not used, but in order to fit a larger antenna shape, the telephone size will be increased. In addition, when you do not want to change the frequency, 'existing phones can be made thinner, because at a given operating frequency, with the same operating frequency bandwidth, the volume of a PIF antenna with a meandering structure is Smaller than a PIF antenna without a meandering structure. The present invention has been shown in several embodiments as detailed above. According to the present invention, the parameters for the system can be changed, and the design engineer can specify the -13 · 1223470 embodiment according to the application he wants, but it should still be the patent protection of the present invention. The category 'the jurisprudence is clear' cannot be further elaborated. (V) Brief description of the diagrams Figure 1 is a schematic diagram of a conventional technology planar inverted-F antenna (PIFA). FIG. 2 is a schematic diagram of a planar inverted-F antenna (PIFA) according to the first embodiment of the present invention. 3 and 4 are top views of a radiating element of PIFA according to other embodiments of the present invention. Figures 5A to 5F, 6A to 6F, and 7A to 7C are representative symbols of the main part of the top view of various shapes of the extended sub-section of PIFA according to different embodiments of the present invention. 1 00 Conventional 10 2 Radiation 1 04 Ground 10 6 Connection Point 10 8 contact point 110 1st 1 2nd 2 114 connection 116 connection 2000 plane 202 radiation 204 ground 206 contact plane flat F-shaped antenna element surface position connection cable connecting wire piece type inverted F-type antenna element surface Position -14- 1223470 2 04 Ground plane 206 Contact position 208 Contact position 2 10 First connection line 2 11 Fengyuhe line 2 12 Second connection line 2 1 4 Connection 2 16 Connection 2 18 Contact position 220 3rd connection line 230 Sub-section 240 Rectangular section 250 Section 3 00 Transmission line 3 10 Bridge connection 3 15 Ground connection 3 20 Transmission line 3 25 `` Hot '' connection 3 3 0 Although!) Section 3 40 , 3 5 0 antenna element 4 15 `` thermal '' connection 425 ground connection 430 sub-segment 440 segment 1223470 4 5 0 segment-16