五、新型說明： 【新型所屬之技術領域】 本創作係有關一種天線結構，特別是一種可增加整體天線 的輻射效果之天線結構者。 ^ 【先前技術】 無線通訊技術的發展，促成許多無線通訊震置，如手機、 筆記型電腦、個人數位助理（PDA)、GPS衛星導航系統、電 子書閱讀器（E-bookreader)等，除具有無線通訊功能外，尚 可透過隱藏式天線取代過去之外露式天線，使得無線通訊裝置 在具有良好的無線通訊品質下，更可兼顧美觀及輕薄之工業設 言十0 然，在電子產品頻頻追求具設計質感的外觀設計下，往往 希望將其外殼以金屬材質製成，或於外殼上鍍上金屬層，這對 無線通訊品質卻會造成影響。由於金屬的屏蔽作用，將阻隔電 磁波傳遞，造成天線訊號不佳。 請參照第1圖所示’係為習知無線通訊裝置la之示意圖。 傳統上，為了改善上述情形’外殼12a必須具有非金屬部" 及金屬部124a。非金屬部122a可由塑膠、碳纖維等非金屬材 質構成，藉以使電磁波可通過非金屬部122a ,而得以被設置 於外殼12a内之天線（未示於圖中）接收，或使天線輕= 磁波可通過開孔14a輻射出去。 射電 請參照第2圖所示，係為美國專利申請案公開 20100141535號之示意圖。係利用配置在電子裝置厶之= 卜殼 22a上之一金屬片24a ’提升外殼22a内之天線26a的場型與 平均增益。然，金屬片24a必須避免與天線26a過度重叠，^ 則將無法達到提升天線增益之功效，反而造成前述之屏蔽作 用0 【新型内容】 有鑑於此，本創作之主要目的在於提出一種天 ，提益、1加頻寬並可具有多模態。本創作之^要“ 在於提出-種天雜構，其具有特少 減少產品之成本及製造時間。 ㈣说罝之優點Ί 丄Ϊ天”:輻射單元;及-金屬罩體，包含凹 ί 21凹 射單元，金屬罩體與輕射單元絕緣，用 以被輻射早元激發而產生至少―共振鶴，金屬罩體包含破 孔’貫穿於凹面與凸面之間。 有關本創作之較佳實施例及其功效，兹配合圖式說明如 後。 【實施方式】 以下舉出具體實施例以詳細說明本創作之内容，並以圖式 作為輔助說明。說明中提及之符號係參照圖式符號。 立請參照第3圖及第4圖所示，係為本創作第一實施例之示 意圖及侧視圖。一種天線結構，包含輻射單元12及金屬罩體 14。輻射單元12包含饋入部及輻射部（未示於圖中）。饋入 部用以饋入電訊號。輻射部電連接饋入部，用以轉換電訊號而 發出電磁波訊號；或者，輻射部接收電磁波訊號後，饋入部轉 換電磁波訊號而輸出電訊號。於此，輻射單元12更可包含接 地部（未示於圖中），電連接輻射部，用以電連接至接地準位。 輻射單元12可為微帶天線(microstrip )、槽孔天線(獅 antenna)、單極天線（mon〇p〇ie肪仿]^)、偶極天線（dip〇le antenna)、平板天線（patch antenna)、迴路天線（loop antenna)、 螺旋天線（spiral antenna)、同轴天線（coaxial antenna)、晶片 天線（chipantenna)、陣列天線（arrayantenna)或其組成之群 M395273 金屬罩體14包含凹面142及凸面144,凹面142朝向輕 射單元12，金屬罩體14與輻射單元12絕緣，透過耦合能量 方式，被輻射單元12激發而產生至少一共振模態。金屬罩體 14包含破孔146，貫穿於凹面H2與凸面H4之間。且金屬罩 體14不可饋入任何電訊號或接地。於此，金屬罩體14之材質 可為鎂、鋁、不鏽鋼、銅或其合金。第3圖所示之金屬罩體 14係呈半球型，僅為了方便說明，並非用以限制本創作。V. New description: [New technical field] This creation is related to an antenna structure, especially an antenna structure that can increase the radiation effect of the overall antenna. ^ [Prior Art] The development of wireless communication technology has led to the shock of many wireless communications, such as mobile phones, notebook computers, personal digital assistants (PDAs), GPS satellite navigation systems, e-book readers, etc. In addition to the wireless communication function, it is still possible to replace the exposed antennas in the past through hidden antennas, so that the wireless communication device can meet the aesthetics and lightness of the industrial design with good wireless communication quality, and it is frequently pursued in electronic products. Under the design of the design, it is often desirable to make the outer casing made of metal or metal layer on the outer casing, which will affect the quality of wireless communication. Due to the shielding effect of the metal, the electromagnetic wave is blocked, resulting in poor antenna signal. Please refer to FIG. 1 for a schematic diagram of a conventional wireless communication device 1a. Conventionally, in order to improve the above situation, the outer casing 12a must have a non-metallic portion " and a metal portion 124a. The non-metal portion 122a may be made of a non-metal material such as plastic or carbon fiber, so that electromagnetic waves can pass through the non-metal portion 122a, and can be received by an antenna (not shown) provided in the casing 12a, or the antenna can be lightly = magnetic wave can be Radiation is radiated through the opening 14a. Radio, please refer to FIG. 2, which is a schematic diagram of U.S. Patent Application Publication No. 20100141535. The field pattern and the average gain of the antenna 26a in the casing 22a are raised by a metal piece 24a' disposed on the electronic device = = 壳 22a. However, the metal piece 24a must avoid excessive overlap with the antenna 26a, and the effect of lifting the antenna gain cannot be achieved, but the shielding effect described above is caused. [New content] In view of this, the main purpose of the creation is to propose a day. Benefit, 1 plus bandwidth and multi-mode. The essence of this creation is “to propose a kind of heaven and earth, which has the special cost and manufacturing time of reducing the product. (4) The advantages of 罝 丄Ϊ 丄Ϊ ””: radiation unit; and – metal cover, including concave 21 21 The concave unit, the metal cover is insulated from the light-emitting unit, and is excited by the radiation element to generate at least a “resonant crane, and the metal cover includes a broken hole” extending between the concave surface and the convex surface. The preferred embodiment of the present invention and its effects are described in conjunction with the drawings. [Embodiment] Hereinafter, specific embodiments will be described in detail to explain the contents of the present invention, and the drawings are used as an explanation. The symbols mentioned in the description refer to the schema symbols. Referring to Figures 3 and 4, it is intended to be a schematic and side view of the first embodiment of the present invention. An antenna structure includes a radiating element 12 and a metal cover 14. The radiating element 12 includes a feeding portion and a radiating portion (not shown). The feed unit is used to feed the electrical signal. The radiating portion is electrically connected to the feeding portion for converting the electrical signal to emit an electromagnetic wave signal; or, after the radiating portion receives the electromagnetic wave signal, the feeding portion converts the electromagnetic wave signal to output the electrical signal. Herein, the radiating unit 12 further includes a grounding portion (not shown) electrically connected to the radiating portion for electrically connecting to the grounding level. The radiating unit 12 can be a microstrip antenna, a slot antenna, a monopole antenna, a dipole antenna, or a patch antenna. ), a loop antenna, a spiral antenna, a coaxial antenna, a chip antenna, an array antenna, or a group thereof M395273 The metal cover 14 includes a concave surface 142 and a convex surface 144, the concave surface 142 faces the light-emitting unit 12, and the metal cover 14 is insulated from the radiation unit 12, and is excited by the radiation unit 12 to generate at least one resonance mode by means of coupling energy. The metal cover 14 includes a hole 146 that penetrates between the concave surface H2 and the convex surface H4. And the metal cover 14 cannot feed any electrical signal or ground. Here, the material of the metal cover 14 may be magnesium, aluminum, stainless steel, copper or an alloy thereof. The metal cover 14 shown in Fig. 3 is a hemispherical type, which is for convenience of description and is not intended to limit the creation.
當輻射單元12輻射電磁波訊號時，具破孔146之金屬罩 體14耦合電磁波訊號’並藉由其較輻射單元12為大之輻射面 積，將電磁波訊號發出，因此，輻射單元12之增益可藉以增 大。另一方面，當接收電磁波訊號時，金屬罩體14提供較又 的面積以接收電磁波訊號。因此輻射單元12之通訊品質可藉 由金屬罩體14而獲得提升。金屬罩體14將電磁波訊號耦合至 輻射單元12，而轉換為電訊號。於此，輻射單元12與金屬罩 體14之破孔146需相隔一距離，避免二者相隔太遠^無法耦 合電磁波訊號；或者，相隔太近，使得輻射出之電磁波訊 度超出法定標準❶ ；When the radiating element 12 radiates the electromagnetic wave signal, the metal cover 14 having the broken hole 146 couples the electromagnetic wave signal 'and emits the electromagnetic wave signal by using the radiating area of the radiating unit 12, so that the gain of the radiating unit 12 can be utilized. Increase. On the other hand, when receiving an electromagnetic wave signal, the metal cover 14 provides a relatively large area to receive electromagnetic wave signals. Therefore, the communication quality of the radiating element 12 can be improved by the metal cover 14. The metal cover 14 couples the electromagnetic wave signals to the radiating element 12 and converts them into electrical signals. Here, the radiating element 12 and the hole 146 of the metal cover 14 need to be separated by a distance to prevent the two from being too far apart to couple the electromagnetic wave signal; or, too close to each other, so that the radiated electromagnetic wave exceeds the legal standard;
於此，破孔146之形狀可為圓形、四方形等幾何形狀，亦 可為不規則形狀’如可設計為商標之外型。且破孔146不可與 金屬罩體14之邊緣連接，亦即，破孔146需為周圍封閉之^ 洞。破孔146正投影至輻射單元12而形成投影部148，並至 少部分與輻射單元12重疊。 〃 請參照第5圖所示，係為本創作第一實施例之增益比專 圖、係與僅輕射單元〗2及輕射早元12配合無破孔金屬罩體j 增益圖進行比較。可見’雖於2GHz至4GHz頻段中，2.2GH 了2.9GHz及3.6GHz〜4GHz頻段下，無破孔之金屬罩體對月 益有所助益，但於2.9GHz〜3.6GHz頻段下，增益卻大幅降低1 然，本創作實施例提出之天線結構可於2GHz至4GHz頻再 下明顯長南天線之增益。由此可見，本創作提出之天線結損 5 確實具有較好之通訊能力。 請參照第6圖所示，係為本創作第一實施例之回饋損失 (Return loss)比較圖’係僅輻射單元12及輻射單元12配合 無破孔金屬罩體之增益圖進行比較。可見雖於輻射單元12上 方增設無破孔之金屬罩體’在2.8 GHz〜3GHz頻段可降低回 饋損失，然於其他頻段均較僅輻射單元12之回饋損失高。丄 觀，本創作實施例提出之天線結構於3.7GHz〜4GHz頻g均 降低回饋損失’尤其於3.05GHz頻率時，可將回饋損失降低至 -gB。再次證明本創作提出之天線結構確實具有較好之通訊 相較於僅單一輻射單元12，於加入金屬罩體14後，輻射 單元12與金屬罩體14之間產生電容效應，而得到較佳的阻抗 匹配’而產生至少一共振模態’且其共振模態可提供更大 寬及增益。 於此，第5圖及第6圖所使用之輻射單元12係為相同。 為了明雄指出本創作提出之天線結構之功效，相較於僅輻射單 元12或於輕射單元12上配合一金屬罩體之差異，輻射單元 12採一微帶天線為例進行量測，然本創作所指之輕射單元12 並非以此為限。 a請參照第7圖所示，係為本創作第二實施例之示意圖。如 别述之天線結構，天線結構更可包含基板16，輻射單元12設 置於基板16上。金屬罩體14可連接至基板16，但與基板16 或基板16上之其他電氣訊號線電氣隔離，從而維持破孔ms 與輻射單元12之距離。於此，金屬罩體14與基板16可以焊 接、黏合、螺栓鎖接等方式連接。 請參照第8圖所示’係為本創作第三實施例之示意圖。如 本創作第_實_之天_構，摘作實_之金屬罩體14 亦包含凹面142及凸面144，舉例而言，可呈拋物線柱體狀 (Cylindricalparaboloid)。凹面 142 朝向輻射單元 12 罩體14亦包含破孔146，貫穿於凹面142及凸面144屬 此外，本創作實補之天線結構亦可如 :路 述，更包含基板16❶ I死例所 综上所述，本創作提出之天線結構確實可提升輻射 12之增益。並透過金屬罩體14之立體設計，金屬罩體w 直接連接於基板16上，無需透過其他固定件（如支撐架 確實可降低製造成本及生產時間。 ’ 雖然本創作的技術内容已經以較佳實施例揭露如上，然复 並非用以限定本創作，任何熟習此技藝者，在不脫離本創^ 精神所作些許之更動與潤飾，皆應涵蓋於本創作的範疇内，因 此本創作之保護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 第1圖為習知無線通訊裝置之示意圖。 第2圖為美國專利申請案公開第2〇1〇〇141535號之示意圖。 第3圖為本創作第一實施例之示意圖。 第4圖為本創作第一實施例之侧視圖。 第5圖為本創作第一實施例之增益比較圖。 第6圖為本創作第一實施例之回饋損失比較圖。 第7圖為本創作第二實施例之示意圖。 第8圖為本創作第三實施例之示意圖。 【主要元件符號說明】 la :無線通訊裝置 12a :外殼 122a :非金屬部 12 :輻射單元 14 :金屬罩體 142 :凹面 M395273 144 :凸面 146 :破孔 148 :投影部 16 :基板 124a :金屬部 2a:電子裝置 22a :外殼 24a :金屬片 26a :天線Here, the shape of the hole 146 may be a geometric shape such as a circle or a square, or may be an irregular shape as designed to be a trademark. Moreover, the hole 146 cannot be connected to the edge of the metal cover 14, that is, the hole 146 needs to be a closed hole. The aperture 146 is projected onto the radiating element 12 to form a projection 148, and at least a portion overlaps the radiating element 12. 〃 Refer to Figure 5 for comparison of the gain ratio map of the first embodiment of the creation, the light-emitting unit 〖2 and the light-emitting early element 12 with the non-corrugated metal cover j gain map. It can be seen that although in the 2GHz to 4GHz frequency band, 2.2GH has a frequency of 2.9GHz and 3.6GHz~4GHz, the metal cover without holes will help the moon, but in the 2.9GHz~3.6GHz band, the gain is Significantly reduced by one, the antenna structure proposed in the present embodiment can significantly increase the gain of the long south antenna from 2 GHz to 4 GHz. It can be seen that the antenna junction loss 5 proposed by this creation does have better communication capabilities. Referring to Fig. 6, a comparison of the return loss of the first embodiment of the present invention is made by comparing only the radiation unit 12 and the radiation unit 12 with the gain map of the non-corrugated metal cover. It can be seen that the addition of a metal cover without a hole above the radiation unit 12 can reduce the feedback loss in the 2.8 GHz to 3 GHz frequency band, but the feedback loss of the radiation unit 12 is higher in other frequency bands. In view of the above, the antenna structure proposed in the present embodiment reduces the feedback loss at frequencies of 3.7 GHz to 4 GHz, especially at the frequency of 3.05 GHz, and the feedback loss can be reduced to -gB. It is again proved that the antenna structure proposed by the present invention does have better communication than the single radiating element 12, and after the metal cover 14 is added, a capacitive effect is generated between the radiating element 12 and the metal cover 14, which is better. Impedance matching 'produces at least one resonant mode' and its resonant mode provides greater width and gain. Here, the radiation units 12 used in FIGS. 5 and 6 are the same. In order to show the effect of the antenna structure proposed by the present invention, the radiation unit 12 takes a microstrip antenna as an example for measurement, compared with the difference between only the radiating unit 12 or the light-emitting unit 12. The light-emitting unit 12 referred to in the creation is not limited to this. a Please refer to FIG. 7 for a schematic view of the second embodiment of the present invention. The antenna structure may further include a substrate 16 on which the radiating element 12 is disposed, as will be described. The metal cover 14 can be attached to the substrate 16 but electrically isolated from the other electrical signal lines on the substrate 16 or substrate 16 to maintain the distance between the aperture ms and the radiating element 12. Here, the metal cover 14 and the substrate 16 may be connected by welding, bonding, bolting, or the like. Please refer to Fig. 8 for a schematic view of the third embodiment of the creation. The metal cover 14 of the present invention also includes a concave surface 142 and a convex surface 144, for example, a parabolic cylindrical shape (Cylindrical paraboloid). The concave surface 142 faces the radiation unit 12. The cover body 14 also includes a hole 146, which penetrates the concave surface 142 and the convex surface 144. The antenna structure of the present invention can also be as follows: a road surface, and a substrate 16 As mentioned, the antenna structure proposed in this creation can indeed increase the gain of the radiation 12. And through the three-dimensional design of the metal cover 14, the metal cover w is directly connected to the substrate 16, without passing through other fixing members (such as the support frame can indeed reduce the manufacturing cost and production time. 'Although the technical content of the creation has been better The embodiment is disclosed above, but it is not intended to limit the creation. Anyone who is familiar with the art, and some modifications and retouchings that do not depart from the spirit of this creation should be covered in the scope of the creation, so the scope of protection of the creation. BRIEF DESCRIPTION OF THE DRAWINGS The following is a schematic diagram of a conventional wireless communication device. Figure 2 is a disclosure of U.S. Patent Application Serial No. 2,141,535. Fig. 3 is a schematic view of the first embodiment of the creation. Fig. 4 is a side view of the first embodiment of the creation. Fig. 5 is a comparison diagram of the gain of the first embodiment of the creation. The feedback loss comparison diagram of the first embodiment. Fig. 7 is a schematic view of the second embodiment of the creation. Fig. 8 is a schematic view of the third embodiment of the creation. [Main component symbol description] la : Line communication device 12a: housing 122a: non-metal portion 12: radiation unit 14: metal cover 142: concave surface M395273 144: convex surface 146: broken hole 148: projection portion 16: substrate 124a: metal portion 2a: electronic device 22a: housing 24a :metal piece 26a: antenna