201238147 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種槽孔天線，尤指一種其上包含一或 二個短載線 '或背面有一 L型微帶線之之環狀槽孔天線。 【先前技術】 由於環狀槽孔天線（slot-ringantenna)具有低姿態、重量輕、 尺寸小、製造容易、成本低等特性，並且符合操作頻寬之 需求，目前係廣泛應用於行動通訊領域中。請參照圖丨，圖 1係習知之一環狀槽孔天線之示意圖，如圖1所示，習知以 微帶線饋入之環狀槽孔天線9係包括一絕緣介質層9〇 ' 一接 地元件9〗 ' 以及一饋入元件92 ;其中’接地元件91係設置 於絕緣介質層90之一表面，接地元件91上具有一多邊形環 狀槽孔911 ’其係將接地元件91分割為一例如為圓形之多邊 形區塊912、以及一外圍區塊913 ’饋入元件92係為一微帶 線’其饋入至多邊形區塊912以經多邊形環狀槽孔91丨將能 量耦合至接地元件91，進而使環狀槽孔天線9提供一工作頻 段。習知之環狀槽孔天線，係藉由結構上的不對稱性產生 共振，以提供線性極化雙頻之工作頻段、或產生單頻段之 圓極化天線’但並無利用簡單結構，僅由單一天線同時提 供線性極化雙頻工作頻段，同時產生另一單頻段圓極化工 作頻段，由此可知，習知環狀槽孔天線仍有諸多缺失而有 予以改進之必要。此外，單就獨立產生線性極化雙頻之工 作頻段而言，例如使用雙環、或以[型開路微帶線饋入短路 之方型槽孔環狀天線專習知手段，仍嫌複雜；而單就獨 201238147 立產生單頻圓形極化之工作頻段而言，習知技術多以微帶 線偶合一具短路戴線之槽孔環’通常其所需環之尺寸會大 於一個波長，因此亦有可改進之處。 【發明内容】 本心·明之一目的係在提供一種藉由槽孔的不對稱性， 達成單一平面結構之雙工作頻段環狀槽孔天線。 本發明之另一目的係在提供一種可提供圓形極化之工 作頻段之環狀槽孔天線，其係於多邊形環狀槽孔正下方設 置一 L型微帶元件以產生圓形極化工作頻段。 依據本發明之一特色，本發明係提出一種環狀槽孔天 線’包括：-絕緣介質層，具有一表面；一接地元件，係 设置於絕緣介質層之表面上，其上具有一多邊形環狀槽 孔，其係將接地元件分割為一多邊形區塊、以及一外圍區 塊，多邊形區塊係包括一饋入點；一第一短截線，其為導 電材質，係設置於多邊形環狀槽孔上，並連接於多邊形區 塊及外圍區塊之間；以及一饋入元件，其係饋入至饋入點 以經多邊形環狀槽孔將能量耦合至接地元件，以使環狀槽 孔天線提H頻段’其巾，第—㈣線之連接點以 及饋入點係分別位於多邊形區塊之上下緣。 依據本發明之另一特色，本發明係提出一種環狀槽孔 :線’包括：一絕緣介質層’具有一上表面及一下表面； 一接地元件，係設置於絕緣介質層之該上表面，其上具有 一多邊形環狀槽孔，其係將接地元件分割為一多邊形區 s 201238147 塊'以及一外圍區塊，多邊形區塊係包括一饋入點，其係 位於多邊形區塊之下緣；—L型微帶元件係設置於絕緣介 質層之下表面，其中L型微帶區塊之轉折角係重疊至多邊形 環狀槽孔中央之下方，且其中一邊係穿過多邊形環狀槽孔 上緣之下方形成一相交區段；以及一饋入元件，其係饋入 至饋入點以經多邊形環狀槽孔將能量耦合至接地元件，以 使環狀槽孔天線提供圓形極化之一第一工作頻段。 【實施方式】 請參照圖2，圖2係本發明之第一實施例之環狀槽孔天 .線1之示意圖。如圖2所示，環狀槽孔天線t包括一絕緣介質 層1 〇、一接地元件11、一第一短截線12、以及一饋入元件 13 ’其中’絕緣介質層1〇可為一印刷電路板基板，接地元 件1 1及饋入元件13可為薄層金屬’而在本實施例中，饋入 元件13係為一微帶線。 接地元件Π係設置於絕緣介質層10的一表面上，其上 具有一多邊形環狀槽孔11 1 ’多邊形環狀槽孔u丨的形狀可 為例如圓形或矩形’其係將接地元件Π分割為一多邊形區 塊112、以及一外圍區塊1 13，多邊形區塊112上包括一饋入 點114 ’其係位於多邊形區塊112的下緣。第一短戴線12係 為導電材質，設置於多邊形環狀槽孔111上，並連接於多邊 形區塊112及外圍區塊113之間，第一短截線12的連接點係 位於多邊形區塊112的上緣。饋入元件13係饋入至饋入點 201238147 1 14以經夕邊形％狀槽孔丨1丨將能量搞合至接地元件11，以 使環狀槽孔天線1提供一工作頻段。 請參照圖3 ’圖3係本發明之第二實施例之環狀槽孔天 線2之示意圖。如圖3所示，環狀槽孔天線2包括一絕緣介質 層20、一接地元件2 1、一第一短載線22 1、一第二短截線 222、以及一饋入元件23，其中，絕緣介質層2〇可為一印刷 電路板基板’接地元件21及饋入元件23可為薄層金屬，而 在本實施例中’饋入元件23係為一微帶線。 接地元件2丨係設置於絕緣介質層20的一表面上，其上 具有一多邊形環狀槽孔211 ’多邊形環狀槽孔2丨1的形狀可 為例如圓形或矩形’其係將接地元件21分割為一多邊形區 塊212、以及一外圍區塊213’多邊形區塊212上包括一饋入 點214，其係位於多邊形區塊212的下緣。第一短载線π、 以及第二短載線222皆為導電材質，係設置於多邊形環狀槽 孔211上’並連接於多邊形區塊2丨2及外圍區塊213之間第 一短截線22 1的連接點係位於多邊形區塊2丨2的上緣，第二 短截線222的連接點係位於多邊形區塊2丨2的左緣或右緣。 饋入元件23係饋入至饋入點214以經由多邊形環狀槽孔211 將能量耦合至接地元件21，以使環狀槽孔天線2提供一工作 頻段’其可藉由調整多邊形環狀槽孔211的尺寸而進行調 整。 。 上述兩實施例中，環狀槽孔天線1及2所能提供之工作 頻段較佳係2.4至4.5GHz，其係包括無線通訊寬頻所使用之 2.5GHz及 3.5GHz二頻段。 201238147 。月參知、圖4A至圖4C，圖4 A係本發明之第三實施例之環 狀槽孔天線3之示意圖’圖婦、本發明之第三實施例之環狀 槽孔天線3之絕緣介質層歡上表面之*意圖圖4c係本發 明之第三實施例之環狀槽孔天線3之絕緣介質層默下表 面之示意圖。如圖所示’環狀槽孔天線3包括一絕緣介質層 30、-接地元件3卜-L型微帶元件32、以及一饋入元件”, 其中，絕緣介質層30可為一印刷電路板基板，接地元件31 及饋入元件33可為薄層金屬，而在本實施例中，饋入元件 33係為一微帶線。 絕緣介質層30具有-上表面及一下表面。接地元件31 係設置於絕緣介質層30的上表面，且其上具有一多邊形環 狀槽孔3 1 1 ’多邊形環狀槽孔3丨丨的形狀可為例如圓形或矩 形’其係將接地元件3 1分割為—多邊形區塊3 12、以及一外 圍區塊313,多邊形區塊3 12上包括一饋入點314，其係位於 多邊形區塊312的下緣。l型微帶元件32係設置於絕緣介質 層30的下表面’其轉折角係重疊至多邊形環狀槽孔3丨丨中央 的下方，且L型微帶元件32的其中一邊係穿過多邊形環狀槽 孔3 11上緣的下方形成相交區段。饋入元件33係饋入至饋入 點314以經多邊形環狀槽孔311將能量耦合至接地元件31， 以使環狀槽孔天線3提供圓形極化的一第一工作頻段。 凊參照圖5 A至圖5 C，圖5 A係本發明之第四實施例之環 狀槽孔天線4之示意圖，圖5B係本發明之第四實施例之環狀 槽孔天線4之絕緣介質層4〇之上表面之示意圖，圖5C係本發 201238147 明之第四實施例之環狀槽孔天線4之絕緣介質層4〇之下表 面之示意圖。 如圖所示，環狀槽孔天線4包括一絕緣介質層40、一接 地元件41、一L型微帶元件42、一短戴線43、以及一饋入元 件44 ’其中’絕緣介質層4〇可為一印刷電路板基板，接地 元件41及饋入元件44可為薄層金屬，而在本實施例中，饋 入元件44係為一微帶線。 絕緣介質層40具有一上表面及一下表面。接地元件4】 係設置於絕緣介質層4〇的上表面，且其上具有一多邊形環 狀槽孔41 1，多邊形環狀槽孔41丨的形狀可為例如圓形或矩 形’其係將接地元件4 1分割為一多邊形區塊4 1 2、以及一外 圍區塊4丨3，多邊形區塊412上包括一饋入點414，其係位於 多邊形區塊41 2的下緣。L型微帶元件42係設置於絕緣介質 層40的下表面，其轉折角係重疊至多邊形環狀槽孔41丨中央 的下方，且L型微帶元件42的其中一邊係穿過多邊形環狀槽 孔4 1 1上緣的下方形成相交區段。短裁線43係為導電材質， 6又置於多邊形環狀槽孔41 1上，並連接於多邊形區塊4 1 2及 外圍區塊413之間，並重疊於相交區段之上方。饋入元件料 係饋入至饋入點41 4以經多邊形環狀槽孔411將能量麵合至 接地元件41，以使環狀槽孔天線4提供圓形極化的一第一工 作頻段、以及線性之一第二工作頻段，其中第二工作頻段 可藉由調整多邊形環狀槽孔4 1 1的尺寸而進行調整。 上述兩實施例中’環狀槽孔天線3及4所能提供之圓形 極化之第一工作頻段較佳係2.45GHz，環狀槽孔天線4所能201238147 VI. Description of the Invention: [Technical Field] The present invention relates to a slot antenna, and more particularly to an annular slot including one or two short carrier wires or an L-shaped microstrip line on the back surface antenna. [Prior Art] Since the slot-ring antenna has low profile, light weight, small size, easy manufacturing, low cost, and meets the requirements of operating bandwidth, it is widely used in the field of mobile communications. . Referring to FIG. 1 , FIG. 1 is a schematic diagram of an annular slot antenna. As shown in FIG. 1 , an annular slot antenna 9 fed by a microstrip line includes an insulating dielectric layer 9 〇 ' a grounding element 9' and a feeding element 92; wherein the 'grounding element 91 is disposed on one surface of the insulating dielectric layer 90, and the grounding element 91 has a polygonal annular slot 911' which divides the grounding element 91 into one For example, a circular polygonal block 912, and a peripheral block 913 'feed element 92 is a microstrip line' that is fed into the polygonal block 912 to couple energy to ground via the polygonal annular slot 91 Element 91, in turn, provides an operating frequency band for the annular slot antenna 9. The conventional annular slot antenna generates resonance by structural asymmetry to provide a linearly polarized dual-frequency operating frequency band or a single-band circularly polarized antenna 'but without using a simple structure, only by A single antenna provides both a linearly polarized dual-frequency operating frequency band and another single-band circularly polarized operating frequency band. It can be seen that the conventional annular slot antenna still has many defects and needs to be improved. In addition, in the case of operating bands that independently generate linearly polarized dual-frequency, for example, the use of dual-rings, or the use of [type open microstrip lines to feed short-circuited square-shaped loop antennas, is still complicated; In the case of the single-frequency circular polarization operating band of the single 201238147, the conventional technology mostly uses a microstrip line to couple a short-circuited slot ring. Generally, the size of the required ring will be larger than one wavelength, so There are also improvements. SUMMARY OF THE INVENTION One of the objects of the present invention is to provide a double-operating band annular slot antenna with a single planar structure by asymmetry of slot holes. Another object of the present invention is to provide an annular slot antenna capable of providing a circularly polarized operating frequency band, which is provided with an L-shaped microstrip element directly below the polygonal annular slot for circular polarization operation. Frequency band. According to a feature of the present invention, the present invention provides an annular slot antenna 'including: - an insulating dielectric layer having a surface; a grounding member disposed on a surface of the insulating dielectric layer having a polygonal ring shape thereon a slot, which divides the grounding element into a polygonal block and a peripheral block, the polygonal block includes a feeding point; and a first stub, which is a conductive material, is disposed in the polygonal annular groove a hole, connected between the polygonal block and the peripheral block; and a feed element fed to the feed point to couple energy to the ground element via the polygonal annular slot to make the annular slot The antenna provides the H-band 'the towel, the connection point of the - (four) line and the feeding point are respectively located at the lower edge of the polygon block. According to another feature of the present invention, the present invention provides an annular slot: the line 'including: an insulating dielectric layer' having an upper surface and a lower surface; a grounding member disposed on the upper surface of the insulating dielectric layer, The utility model has a polygonal annular slot, which divides the grounding element into a polygonal area s 201238147 block and a peripheral block, and the polygonal block comprises a feeding point which is located at a lower edge of the polygonal block; The L-type microstrip element is disposed on the lower surface of the insulating dielectric layer, wherein the corner of the L-shaped microstrip block overlaps below the center of the polygonal annular slot, and one of the sides passes through the polygonal annular slot Forming an intersecting section below the edge; and a feed element feeding the feed point to couple energy to the ground element via the polygonal annular slot to provide circular polarization of the annular slot antenna A first working frequency band. [Embodiment] Please refer to Fig. 2, which is a schematic view of an annular slot antenna 1 according to a first embodiment of the present invention. As shown in FIG. 2, the annular slot antenna t includes an insulating dielectric layer 1 , a grounding element 11 , a first stub 12 , and a feeding element 13 ′ where the insulating dielectric layer 1 can be a The printed circuit board substrate, the grounding element 1 1 and the feeding element 13 may be a thin layer of metal '. In the present embodiment, the feeding element 13 is a microstrip line. The grounding element is disposed on a surface of the insulating dielectric layer 10 and has a polygonal annular slot 11 1 'The shape of the polygonal annular slot u 可 can be, for example, a circular or rectangular shape. Divided into a polygon block 112 and a peripheral block 133, the polygon block 112 includes a feed point 114' which is located at the lower edge of the polygon block 112. The first short wearing wire 12 is made of a conductive material, is disposed on the polygonal annular slot 111, and is connected between the polygonal block 112 and the peripheral block 113. The connecting point of the first stub 12 is located in the polygonal block. The upper edge of 112. The feed element 13 is fed to the feed point 201238147 1 14 to couple the energy to the ground element 11 in the form of a sun-shaped slot 丨1丨 so that the annular slot antenna 1 provides a working frequency band. Referring to Figure 3, Figure 3 is a schematic illustration of an annular slot antenna 2 of a second embodiment of the present invention. As shown in FIG. 3, the annular slot antenna 2 includes an insulating dielectric layer 20, a grounding element 21, a first short carrier line 22 1 , a second stub 222, and a feed element 23, wherein The insulating dielectric layer 2 can be a printed circuit board substrate. The grounding element 21 and the feeding element 23 can be a thin layer of metal. In the present embodiment, the feeding element 23 is a microstrip line. The grounding element 2 is disposed on a surface of the insulating dielectric layer 20 and has a polygonal annular slot 211. The shape of the polygonal annular slot 2丨1 can be, for example, a circular or rectangular shape. 21 is divided into a polygon block 212, and a peripheral block 213'. The polygon block 212 includes a feed point 214 located at a lower edge of the polygon block 212. The first short-loading line π and the second short-loading line 222 are all electrically conductive materials, which are disposed on the polygonal annular slot 211 and connected to the first short section between the polygonal block 2丨2 and the peripheral block 213. The connection point of the line 22 1 is located at the upper edge of the polygonal block 2丨2, and the connection point of the second stub line 222 is located at the left or right edge of the polygonal block 2丨2. The feed element 23 is fed into the feed point 214 to couple energy to the ground element 21 via the polygonal annular slot 211 such that the annular slot antenna 2 provides a working frequency band 'which can be adjusted by adjusting the polygonal annular groove The size of the hole 211 is adjusted. . In the above two embodiments, the working frequency bands of the annular slot antennas 1 and 2 are preferably 2.4 to 4.5 GHz, which include the 2.5 GHz and 3.5 GHz dual bands used in the wireless communication broadband. 201238147. 4A to 4C, FIG. 4A is a schematic view of the annular slot antenna 3 of the third embodiment of the present invention, and the insulation of the annular slot antenna 3 of the third embodiment of the present invention FIG. 4c is a schematic view showing the lower surface of the insulating dielectric layer of the annular slot antenna 3 of the third embodiment of the present invention. As shown, the 'annular slot antenna 3 includes an insulating dielectric layer 30, a grounding element 3 - an L-type microstrip element 32, and a feed element", wherein the insulating dielectric layer 30 can be a printed circuit board The substrate, the grounding element 31 and the feeding element 33 may be a thin layer of metal, and in the present embodiment, the feeding element 33 is a microstrip line. The insulating dielectric layer 30 has an upper surface and a lower surface. The surface of the insulating dielectric layer 30 is disposed on the upper surface of the insulating dielectric layer 30 and has a polygonal annular slot 3 1 1 'The shape of the polygonal annular slot 3 可 can be, for example, a circle or a rectangle. For the polygon block 3 12 and a peripheral block 313, the polygon block 3 12 includes a feed point 314 located at the lower edge of the polygon block 312. The l-type microstrip element 32 is disposed on the insulating medium. The lower surface of the layer 30 has its turning angle overlapping the center of the polygonal annular slot 3丨丨, and one of the sides of the L-shaped microstrip element 32 intersects below the upper edge of the polygonal annular slot 3 11 to form an intersection. The feed element 33 is fed to the feed point 314 for a polygonal ring The slot 311 couples energy to the ground element 31 such that the annular slot antenna 3 provides a first operating frequency band of circular polarization. Referring to Figures 5A through 5C, Figure 5A is the first embodiment of the present invention. 4B is a schematic view of the annular slot antenna 4 of the fourth embodiment, FIG. 5B is a schematic view showing the upper surface of the insulating dielectric layer 4 of the annular slot antenna 4 of the fourth embodiment of the present invention, and FIG. 5C is the first embodiment of the present invention 201238147 4 is a schematic view of the lower surface of the insulating dielectric layer 4 of the annular slot antenna 4 of the fourth embodiment. As shown, the annular slot antenna 4 includes an insulating dielectric layer 40, a grounding element 41, and an L-shaped microstrip. The component 42 , a short wire 43 , and a feed component 44 ' wherein the insulating dielectric layer 4 〇 can be a printed circuit board substrate, the grounding component 41 and the feeding component 44 can be a thin layer of metal, and in this embodiment The feeding element 44 is a microstrip line. The insulating dielectric layer 40 has an upper surface and a lower surface. The grounding element 4 is disposed on the upper surface of the insulating dielectric layer 4, and has a polygonal annular groove thereon. The shape of the hole 41 1, the polygonal annular slot 41丨 may be, for example, a circle or a rectangle 'It divides the grounding element 4 1 into a polygonal block 4 1 2, and a peripheral block 4丨3. The polygonal block 412 includes a feeding point 414 which is located at the lower edge of the polygonal block 41 2 . The L-shaped microstrip element 42 is disposed on the lower surface of the insulating dielectric layer 40, and its turning angle is overlapped below the center of the polygonal annular slot 41, and one side of the L-shaped microstrip element 42 passes through the polygonal ring. An intersecting section is formed below the upper edge of the slot 4 1 1. The short cut 43 is made of a conductive material, and 6 is placed on the polygonal annular slot 41 1 and connected to the polygonal block 4 1 2 and the peripheral block. Between 413 and overlapping above the intersecting section. The feed component feed is fed to the feed point 41 4 to face the energy to the ground element 41 via the polygonal annular slot 411 such that the annular slot antenna 4 provides a first operating frequency band of circular polarization, And one of the linear second working frequency bands, wherein the second working frequency band can be adjusted by adjusting the size of the polygonal annular slot 4 1 1 . In the above two embodiments, the first working frequency band of the circular polarization which can be provided by the annular slot antennas 3 and 4 is preferably 2.45 GHz, and the annular slot antenna 4 can
S 9 201238147 提供之線性之第二工作頻段較佳係為2 4至4 5GHz，其係包 括無線通訊寬頻所使用之2.5GHz及3.5GHz二頻段。 圖6 A至圖12係分別針對本發明之第一實施例至第四 實她例進行模擬及實際測試，在第一實施例至第四實施例 中，絕緣介質層10、20、30、40係為厚度1.6„1„1的？{14基板； 多邊形環狀槽孔111、211、311、411係為圓形，且内外半 徑分別為13.5mm及20.3mm ;饋入元件丨3、23、33、44係為 長度為14.5mm之一微帶線，且其與左右接地面之間的距離 為0.75 mm，並具有一長5.9mm寬1.25 mm之電容耦合槽孔； 第一短截線12、221、第二短截線222、以及短截線43之長 度及寬度分別為7.3mm以及2.5mm ; L型微帶元件32、42的 兩邊長的長度皆為26mm，寬度為2mm。 請參照圖6A及圖6B，圖6A係本發明之第一實施例之環 狀槽孔天線1之反射耗損之頻率響應圖’圖6b係本發明之第 一實施例之環狀槽孔天線1之增益之頻率響應圖，其皆係由 模擬而得。由圖6 A可知’環狀槽孔天線1之共振頻率係為 4GHz、以及5.5GHz ;由圖6B可知，環狀槽孔天線i在 2.8-4.9GHz頻段之增益達2dBi。 請參照圖7A至圖7C，圖7A係本發明之第一實施例之環 狀槽孔天線1於2.5GHz頻段之XZ平面輻射場型圖，圖7B係 本發明之第一實施例之環狀槽孔天線1於4 〇GHz頻段之χζ 平面輕射場型圖’圖7C係本發明之第一實施例之環狀槽孔 天線1於5.5GHz頻段之XZ平面輻射場型圖，其皆係由模擬 而得。由圖7A可知’環狀槽孔天線1於2.5GHz頻段可提供0 201238147 極化場型；由圖7B可知，環狀槽孔天線丨於4⑽^^頻段可提 供0極化場型；由圖7C可知，環狀槽孔天線1於5 5(}心頻段 可提供0極化場型。 請參照圖8，圖8係本發明之第二實施例之環狀槽孔天 線2之反射耗損之頻率響應圖，其係由模擬而得。由圖8可 知’環狀槽孔天線2之共振頻率係為2 7GHz以及3 7 GHz。 請參照圖9A及圖9B，圖9A係本發明之第二實施例之環 狀槽孔天線2於2.7GHz頻段於XZ平面之水平及垂直極化輻 射場型圖，圖9B係本發明之第二實施例之之環狀槽孔天線2 於3.7GHz頻段於XZ平面之水平及垂直極化之水平及垂直 極化輻射場型圖，其皆係由實驗而得。環狀槽孔天線2的第 一短截線221、以及第二短戴線222係使得環狀槽孔天線2具 有不對稱性，因而可提供2.7及3.7(}^^之雙寬頻工作頻段。 請參照圖1 0A至圖1 〇c，圖丨〇A係本發明之第一、第三 及第四貫施例之環狀槽孔天線之反射耗損之頻率響應圖， 圖10B係本發明之第一、第三及第四實施例之環狀槽孔天線 之軸比之頻率響應圖，圖10C係本發明之第一、第三及第四 實施例之環狀槽孔天線之增益之頻率響應圖，其皆係由模 擬而得。由圖10A可知，環狀槽孔天線4在3 5(}Hz頻段的反 射耗損可達10dB;由圖10C可知，環狀槽孔天線3及4皆可提 供2.5GHz之工作頻段，環狀槽孔天線4可提供3 5GHz之工作 頻段。 請參照圖1 1A至圖11 c，圖1 1A係本發明之第四實施例 之環狀槽孔天線4之反射耗損之頻率響應圖，圖nB係本發 201238147 明之第四貫施例之環狀槽孔天線4之轴比之頻率響應圖，圖 11C係本發明之第四實施例之環狀槽孔天線4之增益之頻率 響應圖，其皆係由實際量測而得。由圖1】A可知，環狀槽孔 天線4的反射耗損在2.4-4.5 GHz之工作頻段皆達i〇dBe由圖 11C可知，環狀槽孔天線4的增益在2.4-4.5GHz之工作頻段 皆大於2 dBi。 清參照圖12，圖12係本發明之第四實施例之環狀槽孔 天線4於2.45GHz頻段XZ平面之水平及垂直極化輻射場型 圖，其係實際量測而得。由圖]2可知，環狀槽孔天線4在 2.45GHz頻段’在±30。皆有良好的圓形極化表現。 綜上所述’本發明之環狀槽孔天線，係於單一平面結 構上以至少一短截線造成環狀槽孔之不對稱，而可提供線 性之寬頻工作頻段；若於其背面設置一 L型微帶區塊，由於 L型微帶被多邊形環狀槽孔耦合，因而更可提供圓形極化之 工作頻段。 上述實施例僅係為了方便說明而舉例而已，本發明所 主張之權利範圍自應以申請專利範圍所述為準，而非僅限 於上述實施例。 【圖式簡單說明】 圖1係習知之一環狀槽孔天線之示意圖。 圖2係本發明之第一實施例之環狀槽孔天線之示意圖。 圖3係本發明之第二實施例之環狀槽孔天線之示意圖。 圖4 A係本發明之第三實施例之環狀槽孔天線之示意圖。The second working frequency band provided by S 9 201238147 is preferably 24 to 45 GHz, which includes the 2.5 GHz and 3.5 GHz dual bands used in wireless communication broadband. 6A to 12 are simulations and actual tests for the first to fourth embodiments of the present invention, respectively, in the first to fourth embodiments, the insulating dielectric layers 10, 20, 30, 40 Is the thickness 1.6 „1„1? {14 substrate; polygonal annular slots 111, 211, 311, 411 are circular, and the inner and outer radii are 13.5 mm and 20.3 mm, respectively; the feeding elements 丨 3, 23, 33, 44 are 14.5 mm in length. a microstrip line having a distance of 0.75 mm from the left and right ground planes and having a capacitance coupling slot of 5.9 mm in width and 1.25 mm in length; first stub lines 12, 221 and second stub lines 222, And the length and width of the stub 43 are 7.3 mm and 2.5 mm, respectively; the lengths of both sides of the L-shaped microstrip elements 32, 42 are 26 mm and the width is 2 mm. 6A and FIG. 6B, FIG. 6A is a frequency response diagram of reflection loss of the annular slot antenna 1 according to the first embodiment of the present invention. FIG. 6b is an annular slot antenna 1 of the first embodiment of the present invention. The frequency response map of the gain is obtained by simulation. As can be seen from Fig. 6A, the resonant frequency of the annular slot antenna 1 is 4 GHz and 5.5 GHz. As can be seen from Fig. 6B, the gain of the annular slot antenna i in the 2.8-4.9 GHz band is 2 dBi. Referring to FIG. 7A to FIG. 7C, FIG. 7A is an XZ plane radiation pattern diagram of the annular slot antenna 1 of the first embodiment of the present invention in the 2.5 GHz band, and FIG. 7B is a ring shape of the first embodiment of the present invention. The slot antenna 1 is in the 4 〇 GHz band. The plane light field pattern is shown in Fig. 7C. The XZ plane radiation pattern of the annular slot antenna 1 of the first embodiment of the present invention in the 5.5 GHz band is Simulated. It can be seen from Fig. 7A that the 'annular slot antenna 1 can provide 0 201238147 polarization field in the 2.5 GHz band; as shown in Fig. 7B, the ring slot antenna can provide a 0 polarization field in the 4 (10) ^ frequency band; 7C, the annular slot antenna 1 can provide a zero polarization field in the 5 5 (} heart band. Please refer to FIG. 8, which is the reflection loss of the annular slot antenna 2 of the second embodiment of the present invention. The frequency response diagram is obtained by simulation. It can be seen from Fig. 8 that the resonant frequency of the annular slot antenna 2 is 2 7 GHz and 3 7 GHz. Referring to Figures 9A and 9B, Figure 9A is the second embodiment of the present invention. The horizontal and vertical polarization radiation pattern of the annular slot antenna 2 of the embodiment in the XZ plane in the 2.7 GHz band, and FIG. 9B is the annular slot antenna 2 of the second embodiment of the present invention in the 3.7 GHz band. The horizontal and vertical polarization of the XZ plane and the vertical polarization radiation pattern are obtained experimentally. The first stub 221 of the annular slot antenna 2 and the second short line 222 make The annular slot antenna 2 has asymmetry, so it can provide dual broadband operating bands of 2.7 and 3.7 (}^^. Please refer to Figure 1 0A to Figure 1 〇c, figure丨〇A is a frequency response diagram of reflection loss of the annular slot antennas of the first, third, and fourth embodiments of the present invention, and FIG. 10B is a ring of the first, third, and fourth embodiments of the present invention. Fig. 10C is a frequency response diagram of the gain of the annular slot antenna of the first, third and fourth embodiments of the present invention, which are obtained by simulation. As can be seen from FIG. 10A, the reflection loss of the annular slot antenna 4 in the 3 5 (} Hz band can reach 10 dB; as can be seen from FIG. 10C, the annular slot antennas 3 and 4 can provide a working frequency band of 2.5 GHz, and the annular slot The antenna 4 can provide an operating frequency band of 35 GHz. Referring to FIG. 1A to FIG. 11 c, FIG. 11A is a frequency response diagram of reflection loss of the annular slot antenna 4 according to the fourth embodiment of the present invention, and FIG. Figure 10C is a frequency response diagram of the gain of the annular slot antenna 4 of the fourth embodiment of the present invention, which is a frequency response diagram of the axial slot antenna 4 of the fourth embodiment of the present invention. It is obtained from actual measurement. It can be seen from Fig. 1A that the reflection loss of the annular slot antenna 4 is in the working frequency range of 2.4-4.5 GHz. i〇dBe is known from Fig. 11C, and the gain of the annular slot antenna 4 is greater than 2 dBi in the working frequency range of 2.4-4.5 GHz. Referring to Figure 12, Figure 12 is an annular slot antenna of a fourth embodiment of the present invention. 4 The horizontal and vertical polarization radiation pattern of the XZ plane in the 2.45 GHz band is obtained by actual measurement. It can be seen from Fig. 2 that the annular slot antenna 4 is '±30 in the 2.45 GHz band. Circular circular polarization performance. In summary, the 'annular slot antenna of the present invention is a single plane structure with at least one stub to cause asymmetry of the annular slot, and can provide a linear broadband operating frequency band. If an L-type microstrip block is disposed on the back side, since the L-type microstrip is coupled by the polygonal annular slot, a circular polarization working frequency band can be provided. The above-described embodiments are merely examples for the convenience of the description, and the scope of the claims is intended to be limited by the scope of the claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of one of the conventional annular slot antennas. Figure 2 is a schematic illustration of an annular slot antenna of a first embodiment of the present invention. Figure 3 is a schematic illustration of an annular slot antenna of a second embodiment of the present invention. Figure 4A is a schematic view of an annular slot antenna of a third embodiment of the present invention.
S ⑧ 12 201238147 圖4B係本發明之第三實施例之環狀槽孔天線之絕緣介質 層之上表面之示意圖。 、 圖4C係本發明之第三實施例之環狀槽孔天線之絕緣介質 層之下表面之示意圖。 圖5A係本發明之第四實施例之環狀槽孔天線之示意圖。 圖5B係本發明之第四實施例之環狀槽孔天線之絕緣介質 層之上表面之示意圖。 圖5C係本發明之第四實施例之環狀槽孔天線之絕緣介質 層之下表面之示意圖。 圖6A係纟發明之第一實施例之環狀槽孔天線之反射耗損 之頻率響應圖。 圖6B係本發明之第—實施例之環狀槽孔天線之增益之頻 率響應圖。 圖7A係本發明之第一貫施例之環狀槽孔天線於2^^^^頻 段之XZ平面輻射場型圖。 圖7B係本發明之第一實施例之環狀槽孔天線於* 頻 段之XZ平面輻射場型圖。 圖7C係本發明之第一實施例之環狀槽孔天線於$ 頻 段之XZ平面輻射場型圖。 圖8係本發明之第二實施例之環狀槽孔天線之反射耗損之 頻率響應圖》 圖9八係本發明之第二實施例之之環狀槽&天線☆ ughz 頻段之水平及垂直平面輻射場型圖。S 8 12 201238147 Fig. 4B is a schematic view showing the upper surface of the insulating dielectric layer of the annular slot antenna of the third embodiment of the present invention. 4C is a schematic view showing the lower surface of the insulating dielectric layer of the annular slot antenna of the third embodiment of the present invention. Fig. 5A is a schematic view showing an annular slot antenna of a fourth embodiment of the present invention. Fig. 5B is a view showing the upper surface of the insulating dielectric layer of the annular slot antenna of the fourth embodiment of the present invention. Fig. 5C is a view showing the lower surface of the insulating dielectric layer of the annular slot antenna of the fourth embodiment of the present invention. Fig. 6A is a graph showing the frequency response of the reflection loss of the annular slot antenna of the first embodiment of the invention. Fig. 6B is a frequency response diagram of the gain of the annular slot antenna of the first embodiment of the present invention. Fig. 7A is a view showing the XZ plane radiation pattern of the annular slot antenna of the first embodiment of the present invention in the 2^^^ frequency band. Fig. 7B is a view showing the XZ plane radiation pattern of the annular slot antenna of the first embodiment of the present invention in the * frequency band. Fig. 7C is a view showing the XZ plane radiation pattern of the annular slot antenna of the first embodiment of the present invention in the frequency band. Figure 8 is a frequency response diagram of the reflection loss of the annular slot antenna of the second embodiment of the present invention. Figure 9 is a horizontal slot & antenna of the second embodiment of the present invention. Horizontal and vertical of the ☆ ughz band Plane radiation field pattern.
S 13 201238147 圖9B係本發明之笸_隹# , 月之弟—霄施例之之環狀槽孔 頻段之水平及垂直平面㈣場型圖。 圖10A係本發明之第一、坌r — 第—及第四貝、施例之環狀槽孔天 線之反射耗損之頻率響應圖。 圖10B係本發明之n Λ ^ _ 第二及第四實施例之環狀槽孔天 線之軸比之頻率響應圖。 圖10C係本發明之第一、 線之增益之頻率響應圖。 圖11Α係本發明之第四實 之頻率響應圖。 第二及第四實施例之環狀槽孔天 施例之環狀槽孔天線之反射耗損 圖11Β係本發明之第四實施例之環狀槽孔天線之軸比之頻 率響應圖。 圖11C係本發明之第四實施例之環狀槽孔天線之增益之頻 率響應圖。 圖12係本發明之第四實施例之環狀槽孔天線於2·5(3Ηζ頻 段之水平及垂直平面輻射場型圖。 【主要元件符號說明】 1，2, 3, 4, 9環狀槽孔天線 20, 30, 40, 90絕緣介質層 11，21, 31，41，91 接地元件 Π1，211，311,411，911多邊形環狀槽孔 112,212,312,412,912 多邊形區塊 113, 213, 313, 413, 913 外圍區塊S 13 201238147 Fig. 9B is a horizontal and vertical plane (four) field pattern of the ring-shaped slot of the present invention, which is the 槽_隹# of the present invention. Fig. 10A is a graph showing the frequency response of the first embodiment of the present invention, 坌r - first and fourth, and the reflection of the annular slot antenna of the embodiment. Fig. 10B is a graph showing the frequency response of the axial ratio of the annular slot antenna of the n Λ ^ _ second and fourth embodiments of the present invention. Figure 10C is a graph of the frequency response of the first, line gain of the present invention. Figure 11 is a fourth actual frequency response diagram of the present invention. The annular slot hole of the second and fourth embodiments is a reflection loss of the annular slot antenna of the fourth embodiment of the present invention. Fig. 11 is a frequency response diagram of the axial ratio of the annular slot antenna of the fourth embodiment of the present invention. Fig. 11C is a frequency response diagram of the gain of the annular slot antenna of the fourth embodiment of the present invention. Figure 12 is a diagram showing the radiation pattern of the horizontal and vertical planes of the annular slot antenna of the fourth embodiment of the present invention in the range of 2·5 (the main component symbol) 1, 2, 3, 4, 9 ring Slot antennas 20, 30, 40, 90 dielectric layers 11, 21, 31, 41, 91 Grounding elements , 1, 211, 311, 411, 911 polygonal annular slots 112, 212, 312, 412, 912 Polygon blocks 113, 213, 313, 413, 913 Peripheral Block
S ③ 14 201238147 114, 214, 314, 414 饋入點 12, 22丨第一短截線 13, 23, 33, 44, 92 饋入元件 222第二短載線 32, 42 L型微帶元件 43短截線S 3 14 201238147 114, 214, 314, 414 feed point 12, 22丨 first stub 13, 13, 33, 44, 92 feed element 222 second short line 32, 42 L-type microstrip element 43 Short line