200826370 九、發明說明： 【發明所屬之技術領域】 特別是一種一體成 本發明係有關於一種雙頻天線 形單片式之雙饋入雙頻天線。 【先前技術】 、炚者無線通訊的發展，相關無線區域網路系統整合 全球衛星定位系統所衍生出來的通訊產品也越來▲多二 化a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2·4及5 GHz 一般使用不同之模組設計，使用時必須在天線後端再連 接一切換電路，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、製作簡 單的優點，並使用雙饋入的機制分別連接至後端電路模 組，解決了必須在後端加入一切換電路的問題，而且解 決兩訊號間耦合的影響。 5 200826370 【發明内容】 女上所述本發明之目的在於提供一種具有雙饋入 ，雙頻天線的創新設計。本項設計可以㈣產生一第一 =頻▼ a盍全球衛星定位系統之li (1.仍服）頻帶及 一第二操作頻帶涵蓋無線區域網路2.4GHz(24GG-2484 =Hz)頻帶。本發明天線包含：一接地面；一第—輕射金 =4 ’用於產生天線之第—操作頻帶，具有—第一饋入 -第二輕射金屬部’用於產生天線之第二操作頻 ▼，具有一第二饋入點；一短路金屬部，位於該第一輻 射金屬部與該第二輻射金屬部之間，具有複數個槽縫， 且该短路金屬部之一端點連接至該第一輻射金屬部，而 屬部之另一端點連接至該第二輻射金屬部，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人複數個槽 縫-可以有效延長短路金屬部之電流路徑，使得兩 距離增加’因此該雙饋入天線之兩操；頻 I 、/、有鬲隔離度，並使得天線能夠一體成形，降低 製作成本。 - 【實施方式】 參考第1圖，本發明之具有雙饋入雙頻天線一實於 例1匕3 ·—介質基板10接地面11，印刷於該介質 基板下；一第一輻射金屬部12，用於產生天線之第一二 作頻帶’具有-第-饋入點121 ; -第二輻射金屬部木 200826370 13，用於產生天線之第二操作頻帶，具有—第二饋入點 ⑶；-短路金屬料’位於該卜輕射金屬和^ 第二韓射金屬部13之間，並包含：一端點⑷，連接至〆 該第一輻射金屬部12 ’·另一端點142 ，連接至該第二輻 射金屬部13 ;短路點143 ，電器連接至該接地面n^ 複數個槽缝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u盥嗜第 :-輻射金屬部之第-饋入點121 第二訊號源i 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 。在本實施例丨中，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14係由一單一金屬片沖 壓（stamping)或切割（咖如§)製作而成。 第2圖為本發明天線應用於可攜式導航裝置（ρΝ〇， 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谓式右 側，易於接收GPS與Wi-Π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、 S22)及隔離度（sy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 mm、 寬度約為70 mm ;該第一輻射金屬部12其長度約為35 7 200826370 、覓度約為1 mm ;該第二輻射金屬部η其長度約為 23 mm、寬度約為lmm。由所得實驗結果，在_1〇犯反 射係數的定義下，其第一操作頻帶31足以涵蓋丄丨(1575 GHz)王球衛生疋位系統之頻帶，而在第二操作頻帶&足 以涵蓋2.4GHz (2400-2484 MHz)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_2〇犯。 第4圖與第5圖為本發明天線一實施例i分別在輕 射頻率1575 MHz與2442 MHz的天線輻射場型量測結果。 由所得的實施例測試結果，於操作頻率1575 MHz之下， 其Erhcp分1大於ELHCP分量，具有較佳之Gps右旋訊號接 收能力；且於操作頻率2442MHZ2 x_y平面（水平面） 的量測輻射場型，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 (1·575 GHz)頻帶之天線增益模擬結果。由模擬結果可 弟操作頻π之天線右旋圓極化增益約為_〇 4犯丨左 右’ $合應詩全球衛星定㈣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2.4 GHz(=4()_2484MHz)之天線增益模擬結果。由模擬結果可 知，=一刼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之料方式大致相同，不同之處在 於°玄短路金屬部84，位於該第一輻射金屬部12與該第 200826370 二輻射金屬部13之間，包含：一端點841，連接至該第 一輪射金屬部12 ;另一端點842 ，連接至該第二輻射金 屬部13 ;短路點843，電氣連接至該接地面n ;及複數 個槽縫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搞合之影響;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83 係由印刷或姓刻技術形成於一介質基板87上。 以上說明中所述之實施例僅為說明本發明之原理及 其功效，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 驗置測結果圖。 第4圖為本發明之雙饋入雙頻天線一實施例操作於15乃 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 9 200826370 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2糾2 MHz之天線增益模擬結果。 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 第二輻射金屬部 131 第二輛射金屬部之饋入點 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 槽缝或槽孔 15 第一訊號源 10 200826370 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S 2 1 介質基板200826370 IX. Description of the invention: [Technical field to which the invention pertains] In particular, an integrated invention relates to a dual-frequency antenna-shaped monolithic dual-input dual-frequency antenna. [Prior Art], the development of wireless communication, the related wireless local area network system integration of global satellite positioning system derived communication products are also more and more ▲ multi-dimensional mobile phones, personal digital assistants and notebook computers and other products With built-in wireless Internet access and satellite positioning, signal coupling and transceiver have become the key considerations for the main antenna design. Taiwan Patent Publication No. 563,274 "Dual-Frequency Antenna", reveals a 2·4/5 GHz dual-band antenna that uses a single feed-to-dual-path antenna for dual-band operation, but is commonly used at 2.4 and 5 GHz. Different module designs must be connected to a switching circuit at the back end of the antenna during use, causing circuit matching problems and increasing circuit cost. To solve this problem, we propose an innovative design with dual-input dual-frequency antenna. It not only retains the advantages of low cost and simple fabrication of a single antenna, but also connects to the back-end circuit module by using a dual-feed mechanism, which solves the problem that a switching circuit must be added at the back end, and solves the influence of coupling between the two signals. 5 200826370 SUMMARY OF THE INVENTION The object of the present invention is to provide an innovative design with a dual feed, dual frequency antenna. This design can (4) generate a first = frequency ▼ a 盍 global satellite positioning system li (1. still served) frequency band and a second operating frequency band covering the wireless local area network 2.4 GHz (24GG-2484 = Hz) frequency band. The antenna of the present invention comprises: a ground plane; - light shot gold = 4 'is used to generate the first operating frequency band of the antenna, having - the first feed - the second light metal portion 'for generating the second operating frequency of the antenna, having a second feed point; a short-circuited metal portion between the first radiating metal portion and the second radiating metal portion, having a plurality of slots, and one end of the short-circuited metal portion is connected to the first radiating metal portion, and the other portion is An end point is connected to the second radiating metal portion, and the short-circuited metal portion is electrically connected to the grounding surface. In this design, we place a plurality of slots in the short-circuited metal portion - effectively extending the current of the short-circuited metal portion The path is such that the two distances increase 'so the two inputs of the double feed antenna; the frequency I, /, the 鬲 isolation, and the antenna can be integrally formed, reducing the manufacturing cost. - [Embodiment] Referring to Figure 1, the present invention A dual-input dual-frequency antenna is used in the example 1匕3—the ground plane 11 of the dielectric substrate 10 is printed under the dielectric substrate; a first radiating metal portion 12 is used to generate the first two frequency bands of the antenna. With-first-feed point 12 1 ; -Second radiant metal part 200826370 13, for generating the second operating frequency band of the antenna, having - a second feeding point (3); - shorting metal material 'located in the light metal and ^ second Korean metal part 13 between and including: an end point (4) connected to the first radiating metal portion 12'·the other end point 142, connected to the second radiating metal portion 13; a short-circuit point 143 to which the electrical device is connected to the ground plane n^ A plurality of slots 144 are located at the upper edge of the short-circuited metal portion, and can extend the current path of the short-circuited metal portion to effectively reduce the mutual coupling between the two signals; a first signal source 15 is respectively connected to the ground plane u The second signal source i is connected to the ground plane 11 and the second feed point 131 of the second radiating metal portion 13, respectively. In the embodiment, the first radiating metal portion 12, the second radiating metal portion 13 and the short-circuiting metal portion 14 are formed by stamping or cutting a single metal sheet. FIG. 2 is a schematic perspective view showing the appearance of the antenna of the present invention applied to a portable navigation device (ρΝ〇, Portable Navigation Device). Since 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. The antenna is placed on the right side of the predicate, and the GPS and Wi-Π signals are easily received. And the antenna can be embedded in the portable navigation device for commercial use without being abrupt, and the streamlined appearance can also be designed. Figure 3 is a reflection coefficient, S22) and isolation of the antenna of the first embodiment of the present invention. (The measurement result of the sy is used. In this embodiment, the ground plane 11 environment of the following size is used. We select the ground plane 11 to have a length of about 100 mm. The width of the first radiating metal portion 12 is about 35 7 200826370 and the twist is about 1 mm; the second radiating metal portion η has a length of about 23 mm and a width of about 1 mm. As a result, under the definition of 〇 〇 reflection coefficient, its first operating band 31 is sufficient to cover the band of the 丄丨 (1575 GHz) Wang ball sanitary 疋 system, while in the second operating band & enough to cover 2.4 GHz (2400) -2484 MHz) wireless local area network band, and in terms of isolation 33, the isolation in both operating bands is less than _2. 4 and 5 are antennas according to an embodiment of the present invention. The results of the antenna radiation field measurement of 1575 MHz and 2442 MHz. The test results of the obtained example show that the Erhcp score is greater than the ELHCP component at the operating frequency of 1575 MHz, and has better Gps right-handed signal receiving capability; At operating frequency 2442MHZ2 x_y plane (horizontal plane The measured radiation pattern has a Εθ component similar to the & component and is suitable for use in wireless communication products. Fig. 6 is an antenna gain simulation result of the first operating band (1·575 GHz) band of an antenna embodiment of the present invention. From the simulation results, the right-hand circular polarization gain of the antenna operating frequency π is about _〇4 丨 丨 ' $ $ 合 合 全球 全球 全球 全球 全球 全球 全球 全球 全球 全球 全球 无线 四 无线 无线 无线 无线 第 第 第 第 第 第 第 第 第 第 第 第The antenna gain simulation result in the second operating band of 2.4 GHz (=4()_2484MHz). It can be seen from the simulation results that the maximum antenna gain of the band is about 1.0~1.9 dBi, which satisfies the wireless local area network system. Operational Needs - Figure 8 is an antenna structure diagram of another embodiment of the antenna of the present invention. The present embodiment 8 is substantially the same as that of the embodiment 1, except that the hypo-short metal portion 84 is located at the first radiation. The metal portion 12 and the second and second radiating metal portions 13 include: an end point 841 connected to the first metal portion 12; another end point 842 connected to the second radiating metal portion 13; a short circuit point 843 , electrically connected to the The ground n; and the plurality of slots 844 are staggered on the lower edge of the short-circuited metal portion, and the function is the same as that in the first embodiment, and the current path of the short-circuited metal portion can be extended to effectively reduce the interaction between the two signals; In addition, the first, radiation metal portion 12, the second radiation metal portion 13, and the short metal portion 83 are formed on a dielectric substrate 87 by printing or surname technology. The embodiments described in the above description are only illustrative. The principles of the invention and its efficacy are not limiting of 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. 2 is a schematic perspective view of a first embodiment of an antenna of the present invention applied to a portable navigation device. FIG. 3 is a diagram showing an experimental result of an s-parameter experiment according to an embodiment of the dual-feed dual-frequency antenna of the present invention. 4 is a radiation field type measurement result of an embodiment of the dual feed dual-frequency antenna of the present invention operating at 15 MHz. FIG. 5 is an embodiment of the dual feed dual-frequency antenna of the present invention operating at 2442 MHz. Radiation field type measurement result. Fig. 6 is an antenna gain simulation result of an embodiment of the dual feed dual frequency antenna of the present invention operating at 1575 9 200826370 MHz. Fig. 7 is an implementation of the dual feed dual frequency antenna of the present invention. The example operates on the antenna gain simulation result of 2 2 MHz correction. Fig. 8 is a structural diagram of another embodiment of the radiation metal piece of the dual feed dual frequency antenna of the present invention. [Main component symbol description] 1 The doubly feed of the present invention Into the dual-frequency antenna, an embodiment 8 of the present invention, the dual-input dual-frequency antenna, another embodiment 10, the dielectric substrate 11, the system ground plane 12, the first radiating metal portion 121, the feeding point of the first radiating metal portion, the second radiating metal portion 131 second shot metal Feeding point 14, 84 shorting metal portion 141, 841 shorting metal portion and first radiating metal portion connecting point 142, 842 shorting metal portion and second radiating metal portion connecting point 143, 843 shorting metal portion shorting point 144, 844 slot or slot 15 The first signal source 10 200826370 16 21 22 31 32 33 87 The second signal source The antenna of the present invention is a first resonant mode or a higher operating mode Sn of the portable navigation device. Operating mode S22 isolation S 2 1 dielectric substrate