TWI418094B

TWI418094B - Antipodal exponent bowtie antenna

Info

Publication number: TWI418094B
Application number: TW98122753A
Authority: TW
Inventors: Chun Chieh Fan; Liang Lin Jau; Hsin Kai Chen; I Shan Chen
Original assignee: Chun Chieh Fan
Priority date: 2009-07-06
Filing date: 2009-07-06
Publication date: 2013-12-01
Also published as: TW201103198A

Description

雙面反向指數型領結天線Double-sided reverse index bow tie antenna

一種「領結天線」，尤指一種以雙面反向指數型之結構設計，且具有寬頻、高天線增益、體積小、結構簡單及成本低之雙面反向指數型領結天線A "bow-tie antenna", especially a double-sided reverse-index bow-tie antenna with a double-sided reverse-index structure and a wide frequency, high antenna gain, small size, simple structure, and low cost

現今人們對於無線通訊產品有著愈來愈高的要求與期盼，而在此無線通訊時代中，為了達到訊號有效地接收與發射且提高資訊的傳輸量，“一個有效率的天線”無疑扮演著不可或缺的關鍵性元件。由於印刷電路與微波集成技術的發展以及各種微波低損耗介電材料的出現，多種實用的微帶天線結構陸續被設計出來，這些微帶天線(microstrip antenna)設計都具有一些共同優點，如：簡單平面結構、重量輕、體積小、製作容易且成本低、可與後級電路整合在一起並易與實體共形等特性，這些優點在近年來毫米波電路蓬勃發展的情況下更為突出，因為毫米波電路的發展帶動整個通訊產品體積縮小化，天線尺寸也跟著縮小，因此本身就屬於縮小化天線的微帶天線自然成為通訊業者爭相研發的關鍵性零組件。Nowadays, people have higher and higher requirements and expectations for wireless communication products. In this era of wireless communication, in order to achieve effective signal reception and transmission and improve the transmission of information, "an efficient antenna" undoubtedly plays a role. An essential component that is indispensable. Due to the development of printed circuit and microwave integration technology and the emergence of various microwave low-loss dielectric materials, a variety of practical microstrip antenna structures have been designed. These microstrip antenna designs have some common advantages, such as: Flat structure, light weight, small size, easy to manufacture and low cost, can be integrated with the rear-stage circuit and easy to conform to the entity, these advantages are more prominent in the recent development of millimeter-wave circuits, because The development of millimeter-wave circuits has led to the reduction of the size of the entire communication product, and the size of the antenna has also been reduced. Therefore, the microstrip antenna, which itself belongs to the reduced antenna, naturally becomes a key component that the communication industry is eager to develop.

在典型的領結天線，在介質上是以共平面波導(CPS)方式饋入，天線輻射體是由微帶線往左右二端呈三角形之型狀延伸，天線波長約為二分之一波長長度，由於饋入方式是採用共平面波導方式饋入，因此天線的微帶線之金屬導體必需分為左右兩條金屬導體及中間的縫隙，導致天線的尺寸無法有效縮小，再與電子設備結合時，仍會佔據一定的面積，若強制作為小型化，則導致頻寬與增益下降。In a typical bow tie antenna, the medium is fed by a coplanar waveguide (CPS). The antenna radiator extends from the microstrip line to the left and right ends in a triangular shape. The antenna wavelength is about one-half wavelength. Since the feeding mode is fed by the coplanar waveguide method, the metal conductor of the microstrip line of the antenna must be divided into two metal conductors and the middle gap, so that the size of the antenna cannot be effectively reduced, and then combined with the electronic device. It still occupies a certain area. If it is forced to be miniaturized, the bandwidth and gain will decrease.

有鑑於上述的需求，本發明人爰精心研究，並積個人從事該項事業的多年經驗，終設計出一種嶄新的「雙面反向指數型領結天線」。In view of the above needs, the inventors have carefully studied and accumulated many years of experience in the business, and finally designed a brand new "double-sided reverse index type bow tie antenna".

本發明之一目的，旨在提供一種小尺寸高增益之雙面反向指數型領結天線。It is an object of the present invention to provide a double-sided, low-index, bow-tie antenna with a small size and high gain.

本發明之一目的，旨在提供一種小尺寸極寬頻之雙面反向指數型領結天線。It is an object of the present invention to provide a double-sided reverse index type bow tie antenna of a small size and extremely wide frequency.

本發明之一目的，旨在提供一種成本低適合大量生產製作之雙面反向指數型領結天線。It is an object of the present invention to provide a double-sided reverse index type bow tie antenna that is low in cost and suitable for mass production.

本發明之一目的，旨在提供一種適用於水平全向性天線場型之雙面反向指數型領結天線。It is an object of the present invention to provide a double-sided reverse index type bow tie antenna suitable for use in a horizontal omnidirectional antenna pattern.

本發明之一目的，旨在提供一種適用於陣列天線之雙面反向指數型領結天線。It is an object of the present invention to provide a double-sided reverse index type bow tie antenna suitable for use in an array antenna.

為達上述目的，本發明「雙面反向指數型領結天線」，為包含：一層介質及上下兩層金屬導體。饋入方式為堆疊方式，微帶線金屬導體分為上下二層，一信號由第一微帶線金屬導體饋入，第二微帶線金屬導體為接地面，微帶線金屬導體寬度及介質高度則用以調整饋入阻抗值及與天線輻射導體做匹配；第一指數型輻射導體是第一微帶線金屬導體之延伸，第二指數型輻射導體是第二微帶線金屬導體接地面之延伸，其指數型為上下相對稱之曲線，在尾端則是將上下相對稱之曲線連為一直線，形成一個有曲線之三角形，上下兩層指數型輻射導體之長度用以調整天線之操作頻率，指數之曲線則可調整天線之阻抗匹配；饋入方式是使用接頭或是同軸電鑬線。整體結構為上下兩層金屬導體呈上下微帶線金屬導體堆疊，延伸之指數型輻射導體左右對稱，來達到天線輻射之目的。To achieve the above object, the "double-sided reverse index type bow tie antenna" of the present invention comprises: a layer of medium and two upper and lower metal conductors. The feeding mode is stacking mode, the microstrip line metal conductor is divided into upper and lower layers, one signal is fed by the first microstrip line metal conductor, the second microstrip line metal conductor is grounded surface, the microstrip line metal conductor width and medium The height is used to adjust the feed impedance value and match the antenna radiation conductor; the first exponential radiation conductor is an extension of the first microstrip line metal conductor, and the second exponential radiation conductor is the second microstrip line metal conductor ground plane The extension is characterized by the upper and lower symmetrical curves. At the end, the upper and lower symmetrical curves are connected to a straight line to form a curved triangle. The length of the upper and lower exponential radiation conductors is used to adjust the operation of the antenna. The frequency and exponential curves adjust the impedance matching of the antenna; the feed method is to use a joint or a coaxial electric wire. The overall structure is that the upper and lower metal conductors are stacked with upper and lower microstrip line metal conductors, and the extended exponential radiation conductor is bilaterally symmetric to achieve the purpose of antenna radiation.

本發明之雙面反向指數型領結天線就是要將典型之領結天線之大尺寸縮小，且也不改變原領結天線之極寬頻、高增益之特性，並且也能將本發明之雙面反向指數型領結天線運用在陣列天線上。The double-sided reverse index type bow tie antenna of the present invention is to reduce the large size of a typical bow tie antenna, and does not change the characteristics of the extremely wide frequency and high gain of the original bow tie antenna, and can also reverse the double side of the present invention. An exponential bow tie antenna is used on the array antenna.

為使　貴審查委員能清楚了解本發明之內容，僅以下列說明搭配圖式，敬請參閱。In order for your review board to have a clear understanding of the contents of the present invention, please refer to the following description.

請參閱「第1、2圖」所示，為本發明較佳實施例之結構圖與側面結構圖，如圖所示，本發明「雙面反向指數型領結天線」包含：一層基板40、60及上下兩層金屬導體所構成；第一微帶線之金屬導體10、61，具有寬度11用於信號饋入；第二微帶線之金屬導體12、62，用於微帶線接地面，饋入微帶線採用堆疊式以使指數型領結天線輻射導體為上下二層，將已知之典型領結天線原共平面波導饋入方式中間之間隙的所使用空間精簡為上下堆疊式，以縮小天線整體長度；第一指數型輻射金屬導體20與第二指數型接地面輻射金屬導體30，其天線長度約小於二分之一波長，用於形成天線的操作頻率，其結構具有指數形狀之輻射體21、31，輻射體之寬度22、32為上下指數形狀相連接，其指數型用於調整天線之阻抗匹配及操作頻率之調整且縮小天線之長度；饋入接頭為50歐姆SMA接頭50。本實施例為設計頻率為ISM頻段2.4~2.5GHz，基板40採用FR4 1.0mm基板，指數導體金屬21、31之指數約為e ^0.2 ^x ~e ^0.9 ^x ，上下兩層指數型輻射金屬導體22、32之寬度為45mm，指數型領結天線之總長度為24mm。測量所得之S11如「第3圖」中心頻率2.45GHz為-34dB，「第4圖」為本發明天線實施例之測量之場型2.45GHz X-Y plane近啞鈴型，Y-Z plane則是全向輻射，「第5圖」為本發明天線實施例之增益實驗量測結果，操作頻帶2.4~2.5GHz的天線增益約為3.8~4.0dBi。Please refer to FIG. 1 and FIG. 2 for a structural view and a side view of a preferred embodiment of the present invention. As shown in the figure, the "double-sided inverted index type bow tie antenna" of the present invention comprises: a substrate 40; 60 and two upper and lower metal conductors; the first microstrip line metal conductors 10, 61 have a width 11 for signal feeding; the second microstrip line metal conductors 12, 62 are used for the microstrip line ground plane The feed microstrip line is stacked so that the exponential bow tie antenna radiating conductor is the upper and lower layers, and the space used for the gap between the known common bow tie antennas and the original coplanar waveguide feed mode is reduced to the upper and lower stacks to reduce the antenna. The overall length; the first exponential type radiating metal conductor 20 and the second exponential type ground plane radiating the metal conductor 30, the antenna length of which is less than about one-half of a wavelength, is used to form an operating frequency of the antenna, and the structure has an exponentially shaped radiator 21, 31, the width of the radiator 22, 32 is connected to the upper and lower exponential shape, the exponential type is used to adjust the impedance matching of the antenna and the adjustment of the operating frequency and reduce the length of the antenna; the feed connector is 50 ohm SMA Head 50. In this embodiment, the design frequency is 2.4 to 2.5 GHz for the ISM frequency band, the FR4 1.0 mm substrate is used for the substrate 40, the index of the exponential conductor metal 21, 31 is about e ^0.2 ^x ~ e ^0.9 ^x , and the upper and lower layers of the exponential radiation metal conductor 22, The width of 32 is 45 mm, and the total length of the exponential bow tie antenna is 24 mm. The measured S11 has a center frequency of 2.45 GHz of -34 dB as in "Fig. 3". "Fig. 4" is a field type 2.45 GHz XY plane near dumbbell type measured by the antenna embodiment of the present invention, and the YZ plane is omnidirectional radiation. The "figure 5" is a gain experimental measurement result of the antenna embodiment of the present invention, and the antenna gain of the operation band of 2.4 to 2.5 GHz is about 3.8 to 4.0 dBi.

唯，以上所述者，僅為本發明之較佳實施例而已，並非用以限定本發明實施之範圍；任何熟習此技藝者，在不脫離本發明之精神與範圍下所作之均等變化與修飾，皆應涵蓋於本發明之專利範圍內。The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention All should be covered by the patent of the present invention.

綜上所述，本發明之「專利名稱」，係具有專利之發明性，及對產業的利用價值；申請人爰依專利法之規定，向　鈞局提起發明專利之申請。In summary, the "patent name" of the present invention has the patented invention and the use value of the industry; the applicant applies for an invention patent to the bureau in accordance with the provisions of the patent law.

10．．．第一微帶線之金屬導體10. . . Metal conductor of the first microstrip line

11．．．微帶線之寬度11. . . Width of microstrip line

12．．．第二微帶線之接地金屬導體12. . . Grounded metal conductor of the second microstrip line

20．．．第一指數型輻射金屬導體20. . . First exponential radiation metal conductor

21．．．第一指數型輻射金屬導體之指數形狀twenty one. . . The exponential shape of the first exponential radiation metal conductor

22．．．第一指數型輻射金屬導體之寬度twenty two. . . The width of the first exponential radiation metal conductor

30．．．第二指數型接地面輻射金屬導體30. . . Second exponential type ground plane radiating metal conductor

31．．．第二指數型接地面輻射金屬導體之指數形狀31. . . The exponential shape of the second exponential type ground plane radiating metal conductor

32．．．第二指數型接地面輻射金屬導體之寬度32. . . Second exponential type ground plane radiates the width of the metal conductor

40．．．FR4基板40. . . FR4 substrate

41．．．FR4基板之長度41. . . FR4 substrate length

42．．．FR4基板之寬度42. . . Width of FR4 substrate

50．．．SMA接頭50. . . SMA connector

60．．．FR4基板60. . . FR4 substrate

61．．．第一微帶線金屬導體61. . . First microstrip line metal conductor

62．．．第二微帶線金屬導體62. . . Second microstrip line metal conductor

第1圖本發明較佳實施例之結構圖。BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram of a preferred embodiment of the present invention.

第2圖本發明較佳實施例之側面結構圖。Figure 2 is a side elevational view of a preferred embodiment of the invention.

第3圖本發明較佳實施例之反射損失量測結果。Figure 3 is a graph showing the results of reflection loss measurements in accordance with a preferred embodiment of the present invention.

第4圖本發明較佳實施例於2.45GHz之天線輻射場型量測結果。Figure 4 is a measurement result of an antenna radiation field type at 2.45 GHz in a preferred embodiment of the present invention.

第5圖本發明較佳實施例於2.4~2.5GHz之天線增益量測結果Figure 5 is an antenna gain measurement result of 2.4 to 2.5 GHz in a preferred embodiment of the present invention.

11．．．微帶線之寬度11. . . Width of microstrip line

40．．．FR4基板40. . . FR4 substrate

50．．．SMA接頭50. . . SMA connector

Claims

一種「雙面反向指數型領結天線」，包含：一介質體40、60，為絕緣之介質構成；一微帶線金屬導體，為具有一設於該介質體40、60第一面之第一微帶線金屬導體10、61，一設於該介質體40、60第二面之第二微帶線金屬導體12、62，該微帶線金屬導體一端供一信號饋入；複數之指數型導體金屬，其分別由該第一微帶線金屬導體、該第二微帶線金屬導體延伸為一第一指數型輻射金屬導體、一第二指數型接地面輻射金屬導體30，其中，該指數型導體金屬之寬度為約45mm，該雙面反向指數型領結天線之總長度為約24mm。 A double-sided reverse index type bow tie antenna comprising: a dielectric body 40, 60 formed of an insulating medium; and a microstrip line metal conductor having a first surface disposed on the dielectric body 40, 60 a microstrip line metal conductor 10, 61, a second microstrip line metal conductor 12, 62 disposed on the second side of the dielectric body 40, 60, the microstrip line metal conductor is fed by a signal; the index of the complex number a type of conductor metal extending from the first microstrip line metal conductor, the second microstrip line metal conductor to a first exponential type radiant metal conductor and a second exponential type ground plane radiating metal conductor 30, wherein The width of the exponential conductor metal is about 45 mm, and the total length of the double-sided reverse index bowtie antenna is about 24 mm.

如申請專利範圍第1項之雙面反向指數型領結天線，其中介質體40、60具有一介電係數。 A double-sided reverse index type bow tie antenna according to claim 1, wherein the dielectric bodies 40, 60 have a dielectric constant.

如申請專利範圍第1項之雙面反向指數型領結天線，其中該第一微帶線金屬導體10、61為稍寬或等寬於該第二微帶線接地面金屬導體層12、62。 The double-sided reverse index type bow tie antenna according to claim 1, wherein the first microstrip line metal conductors 10, 61 are slightly wider or equal to the second microstrip line ground plane metal conductor layers 12, 62. .

如申請專利範圍第1項之雙面反向指數型領結天線，其中該等指數型導體金屬20、30之形狀為維持天線全長二分之一波長。 The double-sided inverted exponential bow tie antenna of claim 1, wherein the exponential conductor metals 20, 30 are shaped to maintain one-half of the total length of the antenna.

如申請專利範圍第1項之雙面反向指數型領結天線，其中該等指數型導體金屬20、30之形狀為三角形、梯形、扇形、圓形、弧形或多邊形其中之一者。 A double-sided inverted index type bow tie antenna according to claim 1, wherein the exponential type conductor metal 20, 30 has a shape of one of a triangle, a trapezoid, a sector, a circle, an arc or a polygon.

如申請專利範圍第1項之雙面反向指數型領結天線，其中該雙面反向指數型領結天線進一步以一功率分配器作矩陣式或陣列式連接。The double-sided reverse index type bow tie antenna according to claim 1, wherein the double-sided reverse index type bow tie antenna is further connected in a matrix or array by a power splitter.