200830630 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種天線，尤其涉及一種應用於無線通訊設備 上的天線。 【先前技術】 近年來，美國電子電機工程師協會（以下簡稱：IEEE)制 定的 802.11 無線區域網路（Wireless Local Area Network)協 定增加了兩項重要内容，即IEEE 802.11a協定及IEEE 802.11b/g協定，根據兩項協定規定，在擴展的標準實體層中， 其工作頻帶必須分別設置於5GHz及2.45GHz。 當無線通訊産品欲同時使用該兩種通訊協定時，傳統天線 大都使用低溫共燒陶究（Low Temperatured Cofired Ceramic， LTCC )製程天線或平面倒f型天線（Planar Inverted-F Antenna， pifa)。然而，傳統型LTCC製程天線的價格昂貴，無法有致 降低成本’而傳統型！>IFA天線的面積較大並且可用頻寬較小。 【發明内容】 有鎩於此，有必要提供一種印刷式天線，在實現雙頻之前 提下，具有較小面積。 一種印刷式天線設置於一基板上，包括一訊號饋入線、— 天線本體、一匹配體、一對接地部及一接地金屬面。訊號饋入 線用於饋入電磁波訊號。天線本體設置於基板之一表面，其包 括一第一輻射體及一與該第一輻射體電性連接之第二輕射 200830630 體。第一輕射體及第_ 一輕射體包括-第—；；射體分別與訊號饋人線電性連接。第 開路端，第二輻射體包括一 第一輻射體與第二輻射 弟〜開路細。 第-輻射體之外侧。π ^射體環繞於 與訊號饋入線電性相造m <表面上，亚 天線本體所在之表^，㈣阻抗匹配。該等接地部亦設置於 金屬面設置於基板之另位於訊⑽人線之相對兩側。接地 夕矣而_ # 表面’該另—表面與天線本體所設置 、 、。地金屬面包括一金屬面主體與一凸出部。凸出 部自金屬Μ體之—逢向天線本體之方向延伸。 種印刷式天線’包括—訊號饋人線、—第—輕射體、一 第二輻射體^1配體及—對接地部。訊號饋人線用於饋入電 磁波訊5虎$輪射體呈彎折狀，其—端與訊號饋人線電性連 接另端為開路端。第二輻射體呈彎折狀，其包括有多個輻 射射n之—端與訊號饋人線電性連接，另一端為開 ^第ϋ射體之兩相間隔之輻射段之間开》成至少一空隙， 並且第幸田射體收容於其中之一空隙内。匹配體與訊號饋入線 抗匹配。該等接地料置於喊饋人線之相 對兩側。 上述印刷式天線可實現雙頻之特性，並藉由一輻射體曲折 &置於另-輻射體内部之方式，可有效減小印刷式天線所佔據 之面積。 【實施方式】 8 200830630 請參閱圖1，所示為本發明實施方式之印刷式天線1Ό之示 意圖。印刷式天線10設置於一基板90上，其包括一訊號饋入 線12、一匹配體14、一天線本體、一第一接地部30、一第二 接地部40及一接地金屬面50。訊號饋入線12、匹配體14、天 線本體、第一接地部30及第二接地部40設置於基板90之一 表面’接地金屬面50設置於基板90之另一表面，且該另一表 面與該第一接地部3〇、第二接地部4〇及該天線本體所設置之 表面相對。 訊號饋入線12用於饋入電磁波訊號。在本實施方式中， 訊號饋入線12係5〇歐姆傳輸線。第一接地部3〇與第二接地 部4〇設置於訊號饋入線12之相對兩侧。第一接地部3〇沿訊 '貝線12之延伸長度小於第二接地部沿訊號饋入線I】 之延伸長度。 φ 天線本體用於收發電磁波訊號，其包括一第一輻射體 /、第—輻射體18，分別與訊號饋入線12電性連接。第一輻 射體二6與第二輻射體18皆呈彎折狀^且第二輻射體以環 几於第幸田射體16之外側。第—幸畐射體Μ工作於正迎觀.心 作頻段’其包括一第一韓射段、一第二輕射段n 一第三輻射段164與-第吨射段166，並且所述輻射段依次 ’連接在本貝施方式中，第一輻射段160與訊號饋入線12 電隹連接並相互垂直，第二轄射段162垂直於第一輕射段 ，並且第三輻射段164與第四輕射段166冑平行於第一輕 200830630 射段160。第三輻射段164與第一輻射段ι60分別自 年二轉射 段162之兩端向同一方向延伸，第三輻射段is#與第 166位於同一直線上，並且第四輻射段ι66之一端 第〜開 路端。在本實施方式中，第三輻射段164之寬度小於 ^ 、卑四轉射 段166之寬度，用於增加電磁波訊號流經之路徑。 第二輻射體18工作於IEEE 802.11b/g之工作頻段， 括一第五輻射段180、一第六輻射段182、一第七輻射段Μ斗匕 第八輻射段186及一第九輻射段188，並且所述輻射俨岔 電性連接大致形成一倒S型輻射體。在其它實施方式中，第一 輕射體18亦可呈s型。 在本實施方式中，第五輻射段180與訊號饋入線電性 連接並相互垂直，並且第五輻射段180與第一輻射體16之第 —輪射段160位於同一直線上。第五輻射段18〇、第七輻射段 鲁184與第九輻射段188相互平行。第六輻射段182與第八輻射 & 186相互平行，並且二者垂直於第五輻射段18〇、第七輻射 段184與第九輻射段188。第五輻射段18〇與第七輻射段184 刀別自第六輕射段182之兩端向相同之方向延伸，而第七輻射 ^ 184與第九輻射段188分別自第八輻射段186之兩端向相同 之方向延伸，並且第九輻射段188之一端為一第二開路端。 在本實施方式中，第二輻射體18之每間隔兩輻射段之間 开〆成—空隙’亦即第五輻射段180與第七輻射段184之間以及 第七輕射段184與第九輻射段188之間皆具有一空隙。該第一 200830630 輻射體16收容於第五輻射段18〇與第七輻射段184之間之空 隙内，亦即第二輻射體18之第五輻射段18〇、第六輻射段182 與第七輻射段184環繞在第一輻射體16之第三輻射段164與 第四輻射段166之周圍。 匹配體14设置於訊號饋入線12之一侧，並鄰近於第一接 地部30,用於阻抗匹配。匹配體14與訊號饋入線12相互垂直， 並且匹配體14之一端與訊號饋入線12電性連接，另一端具有 ⑩一接地貫孔，與接地金屬面50相連用於接地。匹配體14於接 地金屬面50之投影位於接地金屬面5〇内。 在本實施方式中，第一輻射段16〇、第二輻射段162、第 二輻射段164、第四輻射段166、第五輻射段18〇、第六輻射段 182、第七輻射段184、第八輻射段186、第九輻射段188及匹 配體14皆為條狀方形。 請同時參閱圖2,所示為圖i中接地金屬面5〇之正面示意 _圖。接地金屬面50係由一矩形的金屬面主體54與一梯形的凸 出部52組成，凸出部52自金屬面主體54之一邊朝天線本體 之方向延伸，並且訊號饋入線12於該接地金屬面5〇之投影位 於接地金屬面50之金屬面主體54與凸出部52内。 在本實施方式中，第一輻射段16〇之長度約為25mm，寬 度約為1mm。第二輻射段162之長度約為2mm，寬度約為 1.5mm。第二輻射段164之長度約為〇 5mm，寬度約為lmm。 第四輻射段166之長度約為4 5mm，寬度約為15mm。第五輻 π 200830630 射段180之長度約為4.5mm，寬度約為imm。第六輻射段182 之長度約為5mm，寬度約為3.5mm。第七輻射段184之長度約 為7.5mm ’寬度約為ι·5ππη。第八輻射段186之長度約為 2.5mm ’寬度約為lmm。第九輻射段188之長度約為1〇腿， 寬度約為1.5mm。匹配體14之長度約為7.5mm，寬度約為1mm。 第一te射體16之第四輻射段166與第二輻射體18之第五 輻射段180、第六輻射段182、第七輻射段184之間之間距dl、 ⑩d2、d3皆為〇.5mm，並且第一輻射體16與第二輻射體is之間 藉由此間距dl、d2、d3產生耦合效應，從而減小印刷式天線 10之面積。 請參閱圖3，所示為經電磁模擬所得圖1中所示之印刷式 天線10之迴波損耗測試圖。由圖可知，印刷式天線1Q工作於 IEEE 802.11a標準之5GHz至6GHz工作頻段及IEEE 802·llb/g 標準之2.4GHz至2.5GHz工作頻段時，其衰減幅度均小於 ® -10dB 〇 圖4至圖8分別為經電磁模擬所得本發明實施方式中印刷 式天線 10 分別工作於 2.4GHz、2.5GHz、5GHz、5.5GHz 及 6GHz 工作頻率時之輻射場型圖。從圖中可知，印刷式天線10工作 於IEEE 802.11a及IEEE 802.11b/g標準時，其具有全向性輻射 之特性。 本發明實加方式之印刷式天線1 〇具有兩個輕射體，可實 現雙頻天線之特性，並藉由第二輻射體18緊密環繞於第一輻 12 200830630 射體16外侧之設計方式’可有效縮小印刷式天線10所佔據的 面積。另，本發明實施方式中，設置於基板90之一表面之接 地金屬面50具有一凸出部52，此種設計可增加印刷式天線1〇 之頻寬。 綜上所述，本發明符合發明專利要件，爰依法提出專利申 請。惟’以上所述者僅為本發明之較佳實施方式，舉凡孰朵本 案技藝之人士’在援依本案發明精神所作之等效修飾或變:匕， 籲皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 圖1為本發明實施方式中之印佩天線之示意圖。 圖2為圖1中接地金屬面之$ & 心正面示意圖。 圖3為經電磁模擬所得圖1由 試圖 。 T之印刷式天線之迴波損耗測 場型圖 圖1中之印刷式天線之輻射 圖4至圖8為經電磁模擬所得 【主要元件符號說明】 印刷式天線 訊號饋入線 10 匹配體 12 第一輻射體 14 第一輻射段 16 第二輻射段 160 162 13 200830630 • 第三輻射段 164 - 第四輻射段 166 第二輻射體 18 第五輻射段 180 弟六韓射段 182 第七輻射段 184 第八輻射段 186 第九輻射段 188 第一接地部 30 第二接地部 40 接地金屬面 50 凸出部 52 金屬面主體 54 基板 90 14200830630 IX. Description of the Invention: [Technical Field] The present invention relates to an antenna, and more particularly to an antenna applied to a wireless communication device. [Prior Art] In recent years, the 802.11 Wireless Local Area Network (ADSL) protocol established by the Institute of Electrical and Electronics Engineers (IEEE) has added two important contents, namely the IEEE 802.11a protocol and IEEE 802.11b/g. The agreement, according to the two agreements, must be set at 5 GHz and 2.45 GHz in the extended standard physical layer. When wireless communication products want to use both communication protocols at the same time, most of the conventional antennas use Low Temperatured Cofired Ceramic (LTCC) process antennas or Planar Inverted-F Antenna (pifa). However, conventional LTCC process antennas are expensive and cannot reduce costs. Traditionally! > The area of the IFA antenna is large and the available bandwidth is small. SUMMARY OF THE INVENTION In view of this, it is necessary to provide a printed antenna which has a small area before being implemented in dual frequency. A printed antenna is disposed on a substrate, and includes a signal feeding line, an antenna body, a matching body, a pair of grounding portions, and a grounding metal surface. The signal feed line is used to feed electromagnetic signals. The antenna body is disposed on a surface of the substrate, and includes a first radiator and a second light-emitting 200830630 body electrically connected to the first radiator. The first light body and the first light body include a -th;; the emitters are electrically connected to the signal feed lines, respectively. At the open end, the second radiator includes a first radiator and a second radiator. The outer side of the first radiator. The π ^ projecting body is electrically connected to the signal feeding line m < on the surface, the sub-antenna body is located in the table ^, (4) impedance matching. The grounding portions are also disposed on opposite sides of the metal (10) human line disposed on the substrate. Grounding 矣 矣 _ # Surface 'The other surface - and the antenna body are set, , . The ground metal surface includes a metal surface body and a protrusion. The bulging portion extends from the metal body to the antenna body. A printed antenna 'includes a signal feed line, a first light emitter, a second radiator ^1 ligand, and a pair of ground portions. The signal feed line is used to feed the electromagnetic wave. The 5 tiger's body is bent, and its end is electrically connected to the signal feed line and the other end is the open end. The second radiator has a bent shape, and includes a plurality of radiation shots, wherein the end is electrically connected to the signal feed line, and the other end is opened between the two phase intervals of the radiant body. At least one gap, and the Kodak field body is contained in one of the gaps. The matching body matches the signal feed line. These grounding materials are placed on opposite sides of the shouting line. The above-mentioned printed antenna can realize the characteristics of dual frequency, and the area occupied by the printed antenna can be effectively reduced by the way that a radiator is bent and placed inside the other radiator. [Embodiment] 8 200830630 Referring to Fig. 1, there is shown a schematic view of a printed antenna 1 according to an embodiment of the present invention. The printed antenna 10 is disposed on a substrate 90 and includes a signal feed line 12, a matching body 14, an antenna body, a first ground portion 30, a second ground portion 40, and a grounded metal surface 50. The signal feeding line 12, the matching body 14, the antenna body, the first grounding portion 30 and the second grounding portion 40 are disposed on one surface of the substrate 90. The grounding metal surface 50 is disposed on the other surface of the substrate 90, and the other surface is The first ground portion 3〇, the second ground portion 4〇, and a surface on which the antenna body is disposed are opposed to each other. The signal feed line 12 is used to feed electromagnetic wave signals. In the present embodiment, the signal feed line 12 is a 5 ohm ohm transmission line. The first ground portion 3'' and the second ground portion 4'' are disposed on opposite sides of the signal feed line 12. The extension length of the first ground portion 3 〇 along the 'beat line 12 is smaller than the extension length of the second ground portion along the signal feed line I】. The φ antenna body is configured to transmit and receive electromagnetic wave signals, and includes a first radiator body/the first radiator body 18, and is electrically connected to the signal feeding line 12 respectively. The first radiator 2 and the second radiator 18 are both bent and the second radiator is looped on the outer side of the Kodak field 16. The first-tuned 畐 Μ Μ Μ . . . 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心The radiant section is sequentially connected in the Bebesch mode, the first radiant section 160 is electrically connected to the signal feed line 12 and perpendicular to each other, the second conditioned section 162 is perpendicular to the first light shot section, and the third radiant section 164 is The fourth light shot 166 is parallel to the first light 200830630 shot 160. The third radiating section 164 and the first radiating section ι60 respectively extend from the two ends of the second-stage rotating section 162 in the same direction, the third radiating section is# is on the same straight line as the 166th, and the fourth radiating section ι66 is at the end of the first radiating section ~ Open the end. In the present embodiment, the width of the third radiating section 164 is smaller than the width of the ^ and the four-turning section 166 for increasing the path through which the electromagnetic wave signals flow. The second radiator 18 operates in an operating frequency band of IEEE 802.11b/g, and includes a fifth radiating section 180, a sixth radiating section 182, a seventh radiating section, a sixth radiating section 186, and a ninth radiating section. 188, and the radiant 俨岔 electrically connected substantially forms an inverted S-type radiator. In other embodiments, the first light body 18 can also be s-shaped. In the present embodiment, the fifth radiating section 180 is electrically connected to the signal feed line and perpendicular to each other, and the fifth radiating section 180 is on the same line as the first shot section 160 of the first radiator 16. The fifth radiating section 18, the seventh radiating section Lu 184 and the ninth radiating section 188 are parallel to each other. The sixth radiant section 182 and the eighth radiant & 186 are parallel to each other and are perpendicular to the fifth radiant section 18 〇, the seventh radiating section 184 and the ninth radiating section 188. The fifth radiating section 18〇 and the seventh radiating section 184 extend from the opposite ends of the sixth light-emitting section 182 in the same direction, and the seventh radiating section 184 and the ninth radiating section 188 are respectively from the eighth radiating section 186. Both ends extend in the same direction, and one end of the ninth radiant section 188 is a second open end. In the present embodiment, the second radiator 18 is separated between two radiant sections into a gap - that is, between the fifth radiant section 180 and the seventh radiant section 184 and the seventh light section 184 and ninth. There is a gap between the radiant sections 188. The first 200830630 radiator 16 is received in a gap between the fifth radiating section 18〇 and the seventh radiating section 184, that is, the fifth radiating section 18〇, the sixth radiating section 182 and the seventh of the second radiator 18. The radiant section 184 surrounds the third radiant section 164 and the fourth radiant section 166 of the first radiator 16 . The matching body 14 is disposed on one side of the signal feed line 12 and adjacent to the first ground portion 30 for impedance matching. The matching body 14 and the signal feeding line 12 are perpendicular to each other, and one end of the matching body 14 is electrically connected to the signal feeding line 12, and the other end has a grounding through hole, which is connected to the grounding metal surface 50 for grounding. The projection of the matching body 14 on the grounded metal surface 50 is located in the grounded metal surface 5?. In this embodiment, the first radiating section 16〇, the second radiating section 162, the second radiating section 164, the fourth radiating section 166, the fifth radiating section 18〇, the sixth radiating section 182, and the seventh radiating section 184, The eighth radiating section 186, the ninth radiating section 188 and the matching body 14 are all strip-shaped squares. Please also refer to FIG. 2, which is a front view of the grounded metal surface 5〇 in FIG. The grounding metal surface 50 is composed of a rectangular metal surface main body 54 and a trapezoidal protruding portion 52. The protruding portion 52 extends from one side of the metal surface main body 54 toward the antenna body, and the signal feeding line 12 is on the grounding metal. The projection of the face 5 is located in the metal face main body 54 and the projection 52 of the grounded metal surface 50. In the present embodiment, the first radiating section 16 has a length of about 25 mm and a width of about 1 mm. The second radiating section 162 has a length of about 2 mm and a width of about 1.5 mm. The second radiating section 164 has a length of about 5 mm and a width of about 1 mm. The fourth radiant section 166 has a length of about 45 mm and a width of about 15 mm. The fifth spoke π 200830630 The length of the shot 180 is about 4.5 mm and the width is about imm. The sixth radiant section 182 has a length of about 5 mm and a width of about 3.5 mm. The seventh radiating section 184 has a length of about 7.5 mm and a width of about ι·5ππη. The eighth radiating section 186 has a length of about 2.5 mm and a width of about 1 mm. The ninth radiant section 188 has a length of about 1 leg and a width of about 1.5 mm. The matching body 14 has a length of about 7.5 mm and a width of about 1 mm. The distance between the fourth radiating section 166 of the first tee body 16 and the fifth radiating section 180, the sixth radiating section 182, and the seventh radiating section 184 of the second radiator 18 is dl, 10d2, and d3 are both 〇5 mm. And a coupling effect is generated between the first radiator 16 and the second radiator is by the distances d1, d2, d3, thereby reducing the area of the printed antenna 10. Referring to Fig. 3, there is shown a return loss test chart of the printed antenna 10 shown in Fig. 1 obtained by electromagnetic simulation. As can be seen from the figure, when the printed antenna 1Q operates in the 5 GHz to 6 GHz operating band of the IEEE 802.11a standard and the 2.4 GHz to 2.5 GHz operating band of the IEEE 802.11b/g standard, the attenuation amplitude is less than +/- 10 dB. FIG. 8 is a radiation pattern diagram of the printed antenna 10 operating at 2.4 GHz, 2.5 GHz, 5 GHz, 5.5 GHz, and 6 GHz operating frequencies, respectively, obtained by electromagnetic simulation in the embodiment of the present invention. As can be seen from the figure, the printed antenna 10 has the characteristics of omnidirectional radiation when it operates in the IEEE 802.11a and IEEE 802.11b/g standards. The printed antenna 1 of the present invention has two light-emitting bodies, which can realize the characteristics of the dual-frequency antenna, and is designed to closely surround the first radiator 12 by the second radiator 12 200830630. The area occupied by the printed antenna 10 can be effectively reduced. In addition, in the embodiment of the present invention, the grounded metal surface 50 disposed on one surface of the substrate 90 has a protrusion 52, which is designed to increase the bandwidth of the printed antenna 1〇. In summary, the present invention complies with the requirements of the invention patent, and proposes a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the equivalent modifications or changes made by the person in charge of the present invention in the spirit of the invention are: Inside. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of an embossed antenna according to an embodiment of the present invention. 2 is a front elevational view of the $&heart of the grounded metal surface of FIG. 1. Figure 3 is an attempt by electromagnetic simulation of Figure 1. The return loss of the printed antenna of T is measured by the radiation pattern of the printed antenna in Fig. 1. Fig. 4 to Fig. 8 are obtained by electromagnetic simulation. [Main component symbol description] Printed antenna signal feed line 10 Matched body 12 First Radiator 14 First radiant section 16 Second radiant section 160 162 13 200830630 • Third radiant section 164 - Fourth radiant section 166 Second radiator 18 Fifth radiant section 180 Sixth Han section 182 Seventh radiant section 184 Eight radiant section 186 ninth radiant section 188 First grounding portion 30 Second grounding portion 40 Grounded metal surface 50 Projection portion 52 Metal surface body 54 Substrate 90 14