1323528 - · · 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種雙頻天線，特別是一種一體成 形單片式之雙饋入雙頻天線。 【先前技術】 隨著無線通訊的發展，相關無線區域網路系統整合 - 王球衛生疋位系統所衍生出來的通訊產品也越來越多樣 }化夕數手機、個人數位助理和筆記型電腦等產品已内 建無線上網以及衛星定位功能，訊號耦合與收發成為主 要天線設計之考量關鍵。台灣專利公告第563,274號“雙 頻天線，揭示一種2.4/5 GHz雙頻天線，使用單一饋入 至雙路徑之天線以達成雙頻操作，但由於24及5GHz 般使用不同之杈組設計，使用時必須在天線後端再連 接-切換電路’造成電路匹配的問題，並且增加電路成 )本。為解決此一問題’我們提出一種具有雙饋入雙頻天 線的創新設計，不僅保留了單一天線成本低廉、 I的優點’並使用雙饋人的機制分別連接至後端電_ ，、且解决了必須在後端加入一切換電路的問題，而 決兩訊號間耦合的影響。 解 5 1323528 【發明内容】 如上所述，本發明之目的在於提供一種具有雙饋入·-之雙頻天線的創新設計。本項設計可以用於產生一第一 ㈣頻帶涵蓋全球衛星定位系統之L i .575 GHz)頻帶及 一第二操作頻帶涵蓋無線區域網路2 4 GHz (24〇〇_2484 MH:)頻帶。本發明天線包含：—接地面；—第一輕射金 屬邛，用於產生天線之第一操作頻帶，具有一第一饋入· ，，一第二輻射金屬部，用於產生天線之第二操作頻 ^八有第一饋入點；一短路金屬部，位於該第一輻、 射金屬部與該第二㈣金屬部之間，具有複數個槽縫，> 且該短路金屬部之—端點連接至該第—輕射金屬部，而 心旦路金屬部之另—端點連接至該第二輕射金屬部，該 短路金屬部並電氣連接至該接地面。 在本項設計中，我們於該短路金屬部置入複數個槽 縫可以有效延長短路金屬部之電流路徑，使得 路徑間之等效距離婵加， ^〇 寸j此離增加，因此該雙饋入天線之兩操作頻 :可以具有高隔離度，並使得天線能夠—體成形，降低） [實施方式】 =第！圖，本發明之具有雙饋人雙頻天線一實施 其：3 ·—介質基板10 ; -接地面,印刷於該介質 輻射金屬部12,用於產生天線之第一操 頻π ’具有一第一饋入點⑵；一第二籍射金屬部 6 1323528 13用於產生天線之第二操作頻帶，具有一第二饋入點 131 ; 一短路金屬部丨4,位於該第一輻射金屬部12盥該 第^輕射金屬部13之間，並包含：一端點⑷，連接至 。亥第一輻射金屬部12 ;另一端點142 ，連接至該第二 射金屬部⑴短路點⑷，電器連接至該接地面心及 複數個槽縫144，位於該短路金屬部之上邊緣，可以延 長短路金屬部之電流路徑，有效降低兩訊號間相互耦合 之影響；一第一訊號源15，分別連接至接地面n與該第 :)一輻射金屬部12之第一饋入點121 ; 一第二訊號源16， 分別連接至接地面11與該第二輻射金屬部13之第二饋入 點131 。在本實施例1中，該第一輻射金屬部12、該第 二輪射金屬部13與該短路金屬部14係由一單一金屬片沖 壓（stamping)或切割（cutting)製作而成。 第2圖為本發明天線應用於可攜式導航裝置 Portable Navigation Device)之立體外觀示意圖。由於本發明 .、 天線21外觀為一片狀，因此可將該天線放置於該可攜式 導航裝置22之機殼内側，.而本圖將天線放置於圖式右 側’易於接收GPS與Wi-Fi之訊號，並且可使得該天線配 合商業用途内藏於可攜式導航裝置之内而不顯得突兀， 亦可設計流線美觀之外型。 第3圖是本發明天線一實施例1的反射係數（Su、 S22)及隔離度（SZ1)量測結果，本實施例使用下列尺寸之 接地面11環境，我們選擇接地面11之長度約為100_、 寬度約為70 mm ;該第一輻射金屬部12其長度約為35 7 1323528 mm、寬度約為^;該第二輕射金屬部i3其長度约為 23 _、寬度約為lmm。由所得實驗結果在狃反 射係數的定義下，其第一操作頻帶31足以涵蓋^㈣$ GHz)全球衛星定㈣統之頻帶，而在第二操作頻帶^足 以涵蓋2.4GHZ(2400-2484MHZ)無線區域網路頻帶，而在隔 離度33方面’兩操作頻帶内之隔離度皆小於-20dB。 第4圖與第5圖為本發明天線-實施例1分別在輕 射頻率撕觀讀2442廳的天線輕射場型量測結果。 由所得的實施例測試結果，於操作頻率1575MHz之下， 其E聰分量大於ELHCp分量’具有較佳之哪右旋訊號接 收能力；且於操作頻率2442MHz之x_y平面（水平面） 的量測ϋ射場型，其Εθ分量與％分量相近，適合應用於 無線通訊產品。 第6圖為本發明天線一實施例於第一操作頻帶 (1.57jGHz)頻帶之天線增益模擬結果。由模擬結果可 第操作頻贡之天線右旋圓極化增益約為·〇.4(ΐ^左 右，適合應用於全球衛星定位系統之無線通訊裝置。〕 第7圖為本發明天線一實施例於第二操作頻帶么4 GHZ_)_2484MH拉天線增益模擬結果。由模擬結果可 知，第二操作頻帶之最大天線增益約為1.0〜1.9dBi之間， 滿足無線區域網路系統之操作需求。 —第8圖為本發明天線之其它實施例天線結構圖。本 貫施例8與實施例1之設計方式大致相同，不同之處在 於該一短路金屬部84，位於該第一輻射金屬部12與該第 :射金屬部13之間，包含：―端點841，連接至該第 :輪射金屬部12;另-端點842，連接至該第二轄射金 部13 ’·短路點843 ，電氣連接至該接地面〗1，·及複數 :槽縫844，交錯置於該短路金屬部之上下邊緣，其功 能與實施例1相同，皆可以延長短路金屬部之電流路 徑，有效降低兩訊號間相互耦合之影響；此外，該第一 輻射金屬部12、該第二輻射金屬部13與該短路金屬部幻 係由印刷或蝕刻技術形成於一介質基板87上。 以上5兑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。 本發明之權利範圍應如後述之申請專利範圍所列。 【圖式簡單說明】 第1圖為本發明之雙饋入雙頻天線一實施例結構圖。 第2圖為本發明天線之一實施例1應用於可攜式導航裝 置之立體外觀示意圖。 第3圖為本發明之雙饋入雙頻天線一實施例之s參數實 驗量測結果圖。 第4圖為本發明之雙饋入雙頻天線一實施例操作於1575 MHz的輻射場型量測結果。 第5圖為本發明之雙饋入雙頻天線一實施例操作於2442 MHz的輻射場型量測結果。 第6圖為本發明之雙饋入雙頻天線一實施例操作於1575 1323528 MHz之天線增益模擬結果。 第7圖為本發明之雙饋入雙頻天線一實施例操作於2442 MHz之天線增益模擬結杲。 第8圖為本發明之雙饋入雙頻天線之輻射金屬片之一其 他實施例結構圖。 【主要元件符號說明】 1 本發明之雙饋入雙頻天線一實施例 8 本發明之雙饋入雙頻天線一其他實施例 10 介質基板 11 系統接地面 12 第一輻射金屬部 121 第一輻射金屬部之饋入點 13 苐一韓射金屬部 131 苐一輻射金屬部之饋入點 14,84 短路金屬部 141,841 短路金屬部與第一輻射金屬部之連接點 142,842 短路金屬部與第二輻射金屬部之連接點 143,843 短路金屬部之短路點 144,844 槽縫或槽孔 15 第一訊號源 10 1323528 16 21 22 31 32 33 87 第二訊號源 本發明天線一實施例 一可攜式導航裝置 第一共振模態或較高操作模態Sn 第二共振模態或較高操作模態S22 隔離度S21 介質基板1323528 - · · ** Description of the Invention: [Technical Field] The present invention relates to a dual-band antenna, and more particularly to an integrally formed single-chip dual-feed dual-band antenna. [Prior Art] With the development of wireless communication, the related wireless local area network system integration - the communication products derived from the Wangqiu health niche system are becoming more and more diverse. The product has built-in wireless Internet access and satellite positioning function, signal coupling and transceiver become the key to the main antenna design considerations. Taiwan Patent Publication No. 563,274 "Double-band antenna, revealing a 2.4/5 GHz dual-band antenna that uses a single feed-to-dual-path antenna for dual-band operation, but uses different sets of designs for 24 and 5 GHz, using At the back end of the antenna, it is necessary to connect the -switching circuit to cause the problem of circuit matching, and to increase the circuit. In order to solve this problem, we propose an innovative design with dual-input dual-frequency antenna, which not only retains a single antenna. The low cost, the advantage of I' and the use of the doubly-fed mechanism are respectively connected to the back-end power_, and solve the problem that a switching circuit must be added at the back end, and the influence of the coupling between the two signals is resolved. Solution 5 1323528 [ SUMMARY OF THE INVENTION As described above, it is an object of the present invention to provide an innovative design of a dual-frequency antenna with dual feed-in. This design can be used to generate a first (four) frequency band covering the global satellite positioning system L i .575 The GHz) band and a second operating band cover the 24 GHz (24 〇〇 2 484 MH:) band of the wireless local area network. The antenna of the present invention comprises: a ground plane; - a first light metal a first operating frequency band for generating an antenna, having a first feed, a second radiating metal portion for generating a second operating frequency of the antenna, having a first feed point; and a short metal portion Between the first spoke metal portion and the second (four) metal portion, having a plurality of slots, > and the end point of the short metal portion is connected to the first light metal portion, and the heart is The other end of the metal portion of the road is connected to the second light metal portion, and the short metal portion is electrically connected to the ground plane. In this design, we can effectively insert a plurality of slots in the short metal portion. Extending the current path of the short-circuited metal portion, so that the equivalent distance between the paths is increased, and the distance between the two is increased. Therefore, the two operating frequencies of the double-fed antenna can have high isolation and enable the antenna to be formed. [Embodiment] = Embodiment: The present invention has a doubly-fed dual-frequency antenna, which is implemented by: 3 - a dielectric substrate 10; a ground plane printed on the dielectric radiating metal portion 12 for generating an antenna The first operating frequency π ' has a first feed point (2); a second electron-emitting portion 6 1323528 13 for generating a second operating frequency band of the antenna, having a second feeding point 131; a short-circuiting metal portion 丨4 located at the first radiating metal portion 12 Between the light-emitting metal portions 13, and comprising: an end point (4) connected to the first radiating metal portion 12; the other end point 142 is connected to the second metal portion (1) short-circuit point (4) to which the electrical device is connected The heart and the plurality of slots 144 are located at the upper edge of the short-circuited metal portion to extend the current path of the short-circuited metal portion, thereby effectively reducing the influence of mutual coupling between the two signals; a first signal source 15 is respectively connected to the ground plane n and The first: a first feed point 121 of the radiating metal portion 12; a second signal source 16 connected to the ground plane 11 and the second feed point 131 of the second radiating metal portion 13, respectively. In the first embodiment, the first radiating metal portion 12, the second injecting metal portion 13, and the short-circuiting metal portion 14 are formed by stamping or cutting a single metal piece. FIG. 2 is a schematic perspective view of the portable navigation device of the present invention applied to the portable navigation device. Because the antenna 21 of the present invention has a single shape, the antenna can be placed inside the casing of the portable navigation device 22, and the antenna is placed on the right side of the drawing to easily receive GPS and Wi- The signal of Fi, and can make the antenna be embedded in the portable navigation device for commercial use without being abrupt, and can also design a streamlined appearance. Figure 3 is a measurement result of the reflection coefficient (Su, S22) and isolation (SZ1) of the antenna 1 of the present invention. In this embodiment, the grounding surface 11 environment of the following size is used, and we select the length of the ground plane 11 to be approximately 100_, the width is about 70 mm; the first radiating metal portion 12 has a length of about 35 7 1323528 mm and a width of about ^; the second light-emitting metal portion i3 has a length of about 23 _ and a width of about 1 mm. From the experimental results obtained, under the definition of the 狃 reflection coefficient, the first operating band 31 is sufficient to cover the band of the (four) $ GHz global satellite, and in the second operating band ^ is sufficient to cover 2.4 GHz (2400-2484 MHz) wireless The regional network band, and in terms of isolation 33, the isolation in both operating bands is less than -20 dB. Fig. 4 and Fig. 5 show the results of the antenna light field type measurement of the antenna of the present invention - the first embodiment of the antenna 1 in the light-frequency frequency tearing reading room 2442, respectively. The test result of the obtained embodiment is that, under the operating frequency of 1575 MHz, the E-cluster component is larger than the ELHCp component, which has the better right-handed signal receiving capability; and the measurement of the x_y plane (horizontal plane) at the operating frequency of 2442 MHz The Εθ component is similar to the % component and is suitable for use in wireless communication products. Figure 6 is a graph showing the simulation results of the antenna gain in the first operating band (1.57 jGHz) band of an embodiment of the antenna of the present invention. The right-hand circular polarization gain of the antenna that can be operated by the simulation result is about 〇.4 (ΐ^, suitable for wireless communication devices of the global satellite positioning system.) FIG. 7 is an embodiment of the antenna of the present invention. In the second operating band, 4 GHZ_)_2484MH pull antenna gain simulation results. It can be seen from the simulation results that the maximum antenna gain of the second operating band is between 1.0 and 1.9 dBi, which satisfies the operational requirements of the wireless local area network system. - Figure 8 is a block diagram of an antenna of another embodiment of the antenna of the present invention. The present embodiment 8 is substantially the same as the embodiment 1 except that the short metal portion 84 is located between the first radiating metal portion 12 and the first metal portion 13 and includes: 841, connected to the first: the metal portion 12 of the wheel; the other end point 842, connected to the second radiant portion 13'·the short circuit point 843, electrically connected to the ground plane 〖1, and plural: slot 844, staggered on the upper edge of the short-circuited metal portion, the function of which is the same as that of the first embodiment, the current path of the short-circuited metal portion can be extended, and the influence of mutual coupling between the two signals is effectively reduced; further, the first radiating metal portion 12 The second radiating metal portion 13 and the short-circuited metal portion are formed on a dielectric substrate 87 by a printing or etching technique. The embodiments described above 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 should be as set forth in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural diagram of an embodiment of a dual feed dual frequency antenna according to the present invention. Fig. 2 is a perspective view showing the stereoscopic appearance of an embodiment 1 of the antenna of the present invention applied to a portable navigation device. Fig. 3 is a graph showing the results of the s-parameter experimental measurement of an embodiment of the dual-fed dual-frequency antenna of the present invention. Fig. 4 is a measurement result of the radiation field type operation of the embodiment of the dual feed dual-frequency antenna of the present invention operating at 1575 MHz. FIG. 5 is a measurement result of a radiation field type operation of an embodiment of the dual feed dual-frequency antenna of the present invention operating at 2442 MHz. Figure 6 is a simulation result of antenna gain of 1575 1323528 MHz, which is an embodiment of the dual feed dual-frequency antenna of the present invention. Fig. 7 is a diagram showing the antenna gain simulation of an embodiment of the dual feed dual-band antenna of the present invention operating at 2442 MHz. Figure 8 is a block diagram showing another embodiment of a radiation metal sheet of a dual-input dual-frequency antenna of the present invention. [Main component symbol description] 1 Double feed quad-band antenna of the present invention Embodiment 8 Dual feed dual-frequency antenna of the present invention - Other embodiment 10 Medium substrate 11 System ground plane 12 First radiating metal portion 121 First radiation Feeding point 13 of the metal part 苐 韩 韩 金属 金属 131 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射 辐射Connection point of metal part 143, 843 short circuit point of short metal part 144, 844 slot or slot 15 first signal source 10 1323528 16 21 22 31 32 33 87 second signal source antenna of the invention one embodiment one portable navigation device first Resonance mode or higher operating mode Sn second resonant mode or higher operating mode S22 isolation S21 dielectric substrate