TWI232612B

TWI232612B - Planar dual-band L-antenna

Info

Publication number: TWI232612B
Application number: TW92101088A
Authority: TW
Inventors: Ming-Hau Ye
Original assignee: D Link Corp
Priority date: 2003-01-20
Filing date: 2003-01-20
Publication date: 2005-05-11
Also published as: TW200414607A

Abstract

The invention relates to a planar dual-band antenna, which prints a coplanar waveguide line or a microstrip on one side of a dielectric substrate and takes one end as the signal feed. The same side or another side of the dielectric substrate is printed with a grounding metal surface on the position corresponding to the coplanar waveguide line or microstrip. The grounding metal surface maintains a fixed space with the coplanar waveguide line or microstrip. Another end of the coplanar waveguide line or microstrip extends to position beyond the grounding metal surface and extends toward both sides of the longitudinally axial direction to form a radiating element and a L-antenna structure. The length that extends the coplanar waveguide line or microstrip beyond the grounding metal surface to the free end of the radiating element equals approximately to one quarter of the wavelength for each of the dual bands respectively so that the radiating element can generate different frequency band signal respectively.

Description

1232612 五、發明說明（1) 發明所屬之技術領域·· 本發明係-種平面式雙頻L型天線，尤指—種印刷技術製作於一介雷曾其：to卜，L7方用丨电貝基板上以產生雙頻段之孚；砵 L型天線。 μ仅之十面式先前技術：按’傳統通信裝置上所使用之L型天線，來閱 :，包括-同軸電纜線10 ’該同轴電纜扪。包含一斤 14(或稱心軸）與外導體〗6(或稱遮蔽網或地 ^體 14與外導體16間係藉一絕緣介電質材隔 == 轴尸、=之該内導體14與外導體16形成磁】之同心導體。3 ’該同軸電欖線1〇之外緣包覆斤： $ 19 ’其-端係連接到一無線通信裝置之控制電路上(.' 中未顯示）’以利用該同軸電規m 〇作為饋入線，^ 端上則套設有一金屬接地平板18，該金屬接地平板、另一該外導體16相連接’以將該同軸遠= 至大地，該另一端並由該内導體14延伸出一卜:體二連接該導體係呈L狀延伸至該金屬接地平板18外，形2呈倒L狀之輻射體，該倒L狀輻射體之長度與該天線之丘率間具有-定之比例關係、，該種天線一般均為單頻； '頌傳統上，為令該種L型天線更輕薄短小，已有業者。此：天線製作於一印刷電路板上，參閱第2圖所示：微帶式之L型天線包括一介電質基板27，該介電質基板^ 〆側面上印製有-微帶線24，俾利用該微帶線24之一端作 1232612 五、發明說明（2) 為訊號饋入端2 4 1，該介電質基板2 7之另一侧面上對應於該微帶線2 4之位置，則印製有一接地金屬面2 8，該微帶線 24之另一端係向對應於該接地金屬面28以外之位置，延伸出一主倒L狀之輻射體2 4 2，該倒l狀輻射體2 4 2之長度與該天線之共振頻率間具有一定之比例關係，該種天線一般亦為單頻設計。此外，另有業者利用共面波導（Coplanar Wave Gui de)作為饋入線，將此種[型天線，製作於一印刷電路板上’參閱第3圖所示，該種共面波導式之L型天線包括一介電質基板37，該介電質基板37 一侧面上印製有一共面波導線34，該共面波導線34之一端係作為訊號饋入端341，在該共面波導線34之同一面上，對應於該共面波導線34之周緣位置，則印製有一接地金屬面3 8，該接地金屬面3 8係與該共面波導線34保持一定間隔，該共面波導線34之另一端則延伸至該接地金屬面3 8以外，形成一呈倒l狀之輻射體342，該倒L狀輻射體342之長度與該天線之共振頻率間具有一定之比例關係，且該種天線亦為單頻設計。近年來，由於行動通訊產品之市場需求大增，使得無線通訊之發展更為快速，在眾多無線通訊標準中，最引人庄目者乃美國電子電機工程師協會（丨EEE ) 8 〇 2 ·丨丨無線區域網路（Wireless Local Area Network)協定，美國電子電機工程師協會（I E E E ) 8 0 2 · 11協定係制定於1 9 9 7年 =，該協定不僅提供了無線通訊上許多前所未有之功能，還提供了可令各種不同廠牌之無線產品得以相互溝通之解1232612 V. Description of the invention (1) The technical field to which the invention belongs ... The invention is a type of planar dual-frequency L-shaped antenna, especially a printing technique. On the substrate to produce the dual frequency band; 砵 L antenna. μ only ten-sided type Prior technology: According to the L-type antenna used in the traditional communication device, read: including-coaxial cable 10 'the coaxial cable 扪. Including a pound of 14 (or mandrel) and outer conductor 6 (or shielding net or ground body 14 and outer conductor 16 is separated by an insulating dielectric material = = shaft body, = the inner conductor 14 and The outer conductor 16 forms a magnetic] concentric conductor. 3 'The coaxial electric cable 10 is covered with an outer edge of the cable: $ 19' its end is connected to the control circuit of a wireless communication device (not shown in. ') 'Using the coaxial electrical gauge m 〇 as a feed line, a metal ground plane 18 is sleeved on the ^ end, the metal ground plane and the other outer conductor 16 are connected' to the coaxial distance = to the ground, the other One end extends from the inner conductor 14 to form a body: the second body connects the conducting system in an L shape and extends out of the metal ground plane 18, the shape 2 is an inverted L-shaped radiator, and the length of the inverted L-shaped radiator is equal to that There is a fixed relationship between the hill rate of antennas. Generally, these antennas are single-frequency; 'Traditionally, in order to make this type of L-shaped antenna thinner and shorter, there are already industry players. This: The antenna is made on a printed circuit board As shown in FIG. 2, the microstrip L-shaped antenna includes a dielectric substrate 27, and the dielectric substrate ^ -The microstrip line 24 is printed on the side. 俾 Use one end of the microstrip line 24 as 1232612. 5. Description of the invention (2) is the signal feeding end 2 4 1 and the other side of the dielectric substrate 2 7 A position corresponding to the microstrip line 24 is printed with a ground metal surface 28, and the other end of the microstrip line 24 is extended to a position corresponding to the ground metal surface 28, extending a main inverted L shape The radiator 2 4 2 has a certain proportional relationship between the length of the inverted l-shaped radiator 2 4 2 and the resonance frequency of the antenna, and the antenna is generally a single-frequency design. In addition, other companies use coplanar waveguides. (Coplanar Wave Gui de) as the feed line, this type of [type antenna is manufactured on a printed circuit board ', as shown in FIG. 3, the coplanar waveguide L-type antenna includes a dielectric substrate 37, A coplanar waveguide line 34 is printed on one side of the dielectric substrate 37. One end of the coplanar waveguide line 34 is used as a signal feeding end 341. On the same surface of the coplanar waveguide line 34, the coplanar waveguide line 34 corresponds to the coplanar waveguide line 34. A ground metal surface 38 is printed on the peripheral edge position of the surface waveguide line 34. The ground metal surface 38 is The coplanar waveguide line 34 is maintained at a certain interval, and the other end of the coplanar waveguide line 34 extends beyond the ground metal surface 38 to form an inverted l-shaped radiator 342, and the length of the inverted L-shaped radiator 342 There is a certain proportional relationship with the resonance frequency of the antenna, and the antenna is also designed as a single frequency. In recent years, due to the large increase in market demand for mobile communication products, the development of wireless communication has been more rapid. Among the most attractive are the American Institute of Electronic and Electrical Engineers (丨 EEE) 8 〇 2 · 丨丨 Wireless Local Area Network (Wireless Local Area Network) agreement, the American Institute of Electronic and Electrical Engineers (IEEE) 8 0 2 · 11 agreement Established in 1997, this agreement not only provides many unprecedented functions in wireless communications, but also provides solutions that enable various wireless products of different brands to communicate with each other.

1232612 、發明說明（3) 決方案’该協定之制定無疑為盔個新的里程碑。然而，在2_^8 ^之發展’開啟了一 (IEEE) 程師協會（IE E E ) /美國國家尸準成為美國電子電機工第组織i ISD丨/ ra 、/国豕軚準協會（ansi )及國際標 ΐ 項重要的：六，$ 一步之修訂，其修訂内容中增加了二 li、a協定及ί σ’、即杲國電子電機工程師協會（IEEE ) 802· 、國電子電機工程師協會協；之規定，在擴展之』準=中其工 401^)'，、故二^°又置在51思赫兹（5(^2)與2.4億赫茲（2. 協定日士，义=無線通訊產品欲同時使用該二種無線通訊 =二：之1型天線即無法滿足此-須求，而必 Λ=:要求，安裝多個天線，然』，此舉不僅增 ν $本、女裝程序，更需在該無線通訊產品上騰出二以安裝該等l型天線，致該無線通訊產品之體積始終無法輕易縮小’以符合輕薄短小之設計趨勢。發明内容：1232612, Description of Invention (3) Solution ‘The formulation of this agreement is undoubtedly a new milestone in the helmet. However, in the development of 2_ ^ 8 ^ 'opened an (IEEE) Institute of Engineers (IE EE) / National Institute of Electrical and Mechanical Engineers became the United States Electronic and Electrical Engineering Organization i ISD 丨 / ra, / National Institute of Standards and Technology (ansi ) And international standard items are important: Six, one-step amendments, which added two li, a agreements and σ ', namely the National Institute of Electronic and Electrical Engineers (IEEE) 802 ·, the National Association of Electronic and Electrical Engineers The agreement stipulated that in the extension of "quasi = Zhongqigong 401 ^) ', the second ^ ° was placed at 51 Hz (5 (^ 2) and 240 million Hz (2. Japan Agreement, meaning = wireless Communication products that want to use the two types of wireless communication at the same time = two: the type 1 antenna cannot meet this-requirements, but must be Λ =: requirements, install multiple antennas, then ", this will not only increase ν $ 本、女女The program also needs to free up two wireless communication products to install the l-type antennas, so that the volume of the wireless communication products cannot always be easily reduced to meet the trend of thin, light and short designs. SUMMARY OF THE INVENTION:

夕有鑑於前述傳統L型天線，均屬單頻天線，無法滿足二頻可上之要求，發明人乃根據多年來從事天線製造之技術經驗，及所累積之專業知識，針對L型天線之特性，悉 ::究各種解決方t，並經不斷研究、實驗與改良後，終於開發設計出本發明之平面式雙頻L型天線。本發明之-目的，係在-介電質基板之一側面上，印In view of the foregoing, the traditional L-shaped antennas are all single-frequency antennas and cannot meet the requirements of two-frequency availability. The inventor has based on the technical experience of antenna manufacturing for many years and the accumulated professional knowledge to address the characteristics of L-shaped antenna Note: After studying various solutions t, and after continuous research, experiment and improvement, finally developed and designed the planar dual-frequency L-shaped antenna of the present invention. The purpose of the present invention is to print on one side of a dielectric substrate

1232612 五、發明說明（4) 製一微帶線，俾利用該微帶線之一端作為訊號饋入端，並在該介電質基板之另一側面上，對應於該微帶線之位置，印製一接地金屬面，該微帶線之另一端係向對應於該接地金屬面以外之位置延伸，並由其縱向軸向兩側分別延伸出一輻射體，形成一狀似T型之天線架構，且令各該輻射體可分別用以接收不同頻段之訊號。本發明之另一目的，係在一介電質基板之一側面上，印製一共面波導線，俾利用該共面波導線之一端作為訊號饋入端，並在該介電質基板之同一側面上，對應於該共面波導線之周緣位置，印製一接地金屬面，該接地金屬面係與該共面波導線保持一定間隔，該共面波導線之另一端係向該接地金屬面以外延伸，並由其縱向軸向兩側分別延伸出一輻射體，形成一狀似T型之天線架構，且令各該輻射體可分別用以接收不同頻段之訊號。本發明之又一目的，係在由該接地金屬面以外之該共面波導線或微帶線延伸至各該輻射體自由端之長度，約分別等於雙頻段中各頻段波長之四分之一長度，俾各該輻射體可分別用以接收美國電子電機工程師協會（I E E E ) 8 0 2 · 11a協定及美國電子電機工程師協會（IEEE ) 8 0 2· lib協定所規定之雙頻帶訊號。為便貴審查委員能對本發明之形狀、構造、設計原理及其功效，有更進一步之認識與瞭解，茲列舉若干實施例，並配合圖示，詳細說明如下：1232612 V. Description of the invention (4) Make a microstrip line, and use one end of the microstrip line as a signal feeding end, and on the other side of the dielectric substrate, corresponding to the position of the microstrip line, A grounded metal surface is printed, and the other end of the microstrip line is extended to a position corresponding to the grounded metal surface, and a radiator is respectively extended from both sides of the longitudinal axis to form a T-shaped antenna. Architecture, and each radiator can be used to receive signals in different frequency bands. Another object of the present invention is to print a coplanar waveguide line on one side of a dielectric substrate, and use one end of the coplanar waveguide line as a signal feed-in terminal, and place the same on the same side of the dielectric substrate. On the side, a ground metal surface is printed corresponding to the peripheral position of the coplanar waveguide line, the ground metal surface is kept at a certain distance from the coplanar waveguide line, and the other end of the coplanar waveguide line is directed to the ground metal surface Extending from the outside, a radiator is extended from both sides of the longitudinal axis to form a T-shaped antenna structure, and each radiator can be used to receive signals of different frequency bands. Another object of the present invention is the length extending from the coplanar waveguide line or microstrip line other than the ground metal plane to the free end of each of the radiators, which is approximately equal to one quarter of the wavelength of each frequency band in the dual frequency band. Length, each of the radiators can be used to receive dual-band signals specified by the Institute of Electrical and Electronics Engineers (IEEE) 802.11a and the Institute of Electrical and Electronics Engineers (IEEE) 802.lib. In order that the review committee can have a better understanding and understanding of the shape, structure, design principles and effects of the present invention, a few examples are listed together with the illustrations, which are described in detail as follows:

1232612 五、發明說明（5) 實施方式：在本發明之一較佳實施例中，請參閱第4圖所示，係在一介電質基板4 7之一側面上，印製一微帶線4 4，俾利用該微帶線44之一端作為訊號饋入端441，並在該介電質基板4 7之另一侧面上，對應於該微帶線4 4之位置，印製一接地金屬面4 8，該微帶線4 4之另一端係向對應於該接地金屬面4 8以外之位置延伸，並由其縱向軸向兩側分別延伸出一幸畜射體4 4 2、4 4 3，形成一呈τ型之天線架構，且令各該輻射體44 2、443可分別用以接收不同頻段之訊號。在該較佳實施例中，由於各該輻射體4 4 2、4 4 3係分別用以接收不同頻段之訊號，故由該接地金屬面48以外之該微帶線44延伸至各該輻射體442、4 43自由端之長度，應^ 別與該天線所欲設計之不同共振頻率間具有一定之比例^ 係。在本發明之該較佳實施例中，由該接地金屬面4 8以外之該微帶線44延伸至各該輻射體44 2、443自由端之長度，以約分別等於所欲設計之雙頻段中各頻段波長之四^ = 一長度為最佳’其中各該輻射體中較長之輕射體⑷係作為低頻輻射體，較短之輻射體442係作為高頻輻射體，俾不同長度之各該輻射體442、443可分別用以接收美國電子電 ==師協會（腿）8G2.lla m定及美國電子電機工程在本發明之另-較佳實施例中，請參；二斤示，係在-介電質基板57之一側面上，印製一共面波導線54，俾利用該共面波導線54之-端作為訊號饋入端541，並在1232612 V. Description of the invention (5) Implementation mode: In a preferred embodiment of the present invention, please refer to FIG. 4, a microstrip line is printed on one side of a dielectric substrate 47 4 4. I use one end of the microstrip line 44 as a signal feed-in terminal 441, and print a ground metal on the other side of the dielectric substrate 47, corresponding to the position of the microstrip line 44. Surface 48, the other end of the microstrip line 4 4 extends to a position corresponding to the ground metal surface 4 8 and a longitudinal animal 4 4 extends from its longitudinal axis on both sides To form a τ-shaped antenna structure, and each of the radiators 44 and 443 can be used to receive signals of different frequency bands. In the preferred embodiment, since each of the radiators 4 4 2, 4 4 3 is used to receive signals of different frequency bands, the microstrip line 44 other than the ground metal surface 48 extends to each of the radiators. The length of the free ends of 442, 4 and 43 should have a certain proportion with the different resonance frequencies of the antenna. In the preferred embodiment of the present invention, the length of the free end of the microstrip line 44 extending from the ground metal surface 48 to each of the radiators 44 and 443 is approximately equal to the desired dual-band design. Four of the wavelengths in each frequency band ^ = a length is the best 'wherein the longer light emitter of the radiator is a low-frequency radiator, and the shorter radiator 442 is a high-frequency radiator. Each of the radiators 442 and 443 can be used to receive the American Electronic and Electrical Engineering Association (leg) 8G2.llam and the American Electronic and Electrical Engineering. In another preferred embodiment of the present invention, please refer to; A coplanar waveguide 54 is printed on a side of the -dielectric substrate 57. The -end of the coplanar waveguide 54 is used as a signal feeding end 541, and

1232612 五、發明說明（6) 該介電質基板57之同一側面，對應於該共面波導線54之周緣位置’印製一接地金屬面5 8，該接地金屬面5 8係與該共面波導線54保持一定之間隔，該共面波導線54之另一端係向該接地金屬面58以外之位置延伸，並由其縱向軸向兩侧分別延伸出一輻射體5 4 2、5 4 3，形成一呈T型之天線架構，且令各該輻射體542、543可分別用以接收不同頻段之訊號。在該另一較佳實施例中，由於各該輻射體542、543係分別用以接收不同頻段之訊號，故由該接地金屬面5 8以外之該共面波導線54延伸至各該輻射體542、543自由端之長度’應分別與該天線所欲設計之不同共振頻率間具有一定之比例關係。在本發明之該另一較佳實施例中，由該接地金屬面58以外之該共面波導線54延伸至各該輻射體542、 5 4 3自由端之長度’以約分別等於所欲設計之雙頻段中各頻段波長之四分之一長度為最佳，其中各該輻射體中較長之輻射體543係作為低頻輻射體，較短之輻射體542係作為高頻輻射體，俾不同長度之各該輻射體542、543可分別用以接收美國電子電機工程師協會（IEEE ) 8〇2· Ua協定及美國電子電機工程師協會（ΙΕΕΕ ) 8〇2·丨lb協定所規定之雙頻帶訊號。一在本發明之刖述較佳實施例中，復請參閱第4及5圖所不，該微帶線44或共面波導線54均係呈直線延伸之長條狀二惟在本發明貫際施作時，可依實際需要或特性匹配，而&汁成，考折延伸之長條狀共面波導線64，如第6圖所1232612 V. Description of the invention (6) The same side of the dielectric substrate 57 corresponds to the peripheral position of the coplanar waveguide line 54. A ground metal surface 5 8 is printed, and the ground metal surface 5 8 is coplanar with the coplanar surface. The wave conductor 54 maintains a certain interval, and the other end of the coplanar waveguide 54 extends to a position other than the ground metal surface 58, and a radiator 5 4 2 and 5 4 3 are respectively extended from both sides of the longitudinal axis. To form a T-shaped antenna structure, and each of the radiators 542, 543 can be used to receive signals of different frequency bands. In the other preferred embodiment, since each of the radiators 542 and 543 is used to receive signals of different frequency bands, the coplanar waveguide line 54 other than the ground metal surface 58 extends to each of the radiators. The lengths of the free ends of 542 and 543 should have a proportional relationship with the different resonance frequencies of the antenna. In another preferred embodiment of the present invention, the length 'from the coplanar waveguide 54 other than the ground metal plane 58 to the free ends of each of the radiators 542, 5 4 3 is approximately equal to the desired design, respectively. One quarter of the length of each band in the dual frequency band is the best. Among them, the longer radiator 543 is a low-frequency radiator, and the shorter radiator 542 is a high-frequency radiator. Each of these radiators 542 and 543 can be used to receive the dual-band signals stipulated by the Institute of Electrical and Electronics Engineers (IEEE) 802 · Ua Agreement and the Institute of Electrical and Electronics Engineers (IEE) 802 · 丨 lb Agreement, respectively. . First, in the preferred embodiment of the present invention, please refer to FIG. 4 and FIG. 5. The microstrip line 44 or the coplanar waveguide line 54 are both elongated linearly. However, in the present invention, In actual application, it can be matched according to actual needs or characteristics, and & juice is made, and the elongated coplanar waveguide line 64 is extended, as shown in FIG. 6

第10頁 1232612 五、發明說明（7) 示。此外，本發明之第4及5圖所示之該微帶線44或共面波導線54，均係由其縱向軸在同一位置向雨侧分別延伸出各該輻射體442、443或542、543，惟，本發明在實際施作時’可依實際需要或特性匹配，而設計成由其縱向軸在不同位置向兩側分別延伸出各該輻射體7 4 2、7 4 3，如第7圖所示。本發明根據第6圖所示之天線結構，將共面波導線 64、二輕射體642、643及接地金屬面68，印製至一厚度約為〇 · 8毫米（mm)且介電係數約為4 · 3〜4 · 7之一平板狀介電質基板上’實際製作出本所發明所稱之平面式雙頻L型天線’其中該共面波導線64及輻射體642、643之寬度約 1mm ’低頻輻射體643之長度約15mm，高頻輻射體642之長度約8mm，而該共面波導線64由該接地金屬面68以外位置所延伸出之長度則約7mm，並令該天線操作於2 2 · 2 3 8 1〜2 8. 6121 億赫兹（2.22381〜2.86121GHz)及49.4078〜56.34 億赫茲（4. 940 78〜5· 6 34GHz )二個頻段，實測其回返損失 (Return Loss)，其量測結果如第8圖所示，二個頻段都優於9分貝（dB )。因此，由該等量測結果顯示，本所發明所設計之平面式雙頻L型天線，確可分別用以接收美國電子電機工程師協會（IEEE ) 8〇2.丨13協定及美國電子電機工程師協會（IEEE ) 8 0 2· lib協定所規定之雙頻帶訊號。以上所述’僅係本發明之較佳實施例，惟，本發明所主張之權利範圍，並不局限於此，按凡熟悉該項技藝人Page 10 1232612 V. Description of Invention (7). In addition, the microstrip line 44 or the coplanar waveguide line 54 shown in Figs. 4 and 5 of the present invention respectively extend the radiators 442, 443, or 542 from the longitudinal axis at the same position to the rain side. 543, however, when the present invention is actually implemented, it can be 'matched according to actual needs or characteristics, and is designed to extend each of the radiators 7 4 2, 7 4 3 from its longitudinal axis at different positions to both sides, as in the first Figure 7 shows. According to the antenna structure shown in FIG. 6, the present invention prints a coplanar waveguide line 64, two light emitters 642, 643, and a ground metal surface 68 to a thickness of about 0.8 millimeters (mm) and a dielectric constant. One of the flat dielectric substrates of about 4 · 3 ~ 4 · 7 was used to "actually produce the planar dual-frequency L-shaped antenna referred to in the present invention", in which the coplanar waveguide 64 and the radiators 642 and 643 The width is about 1mm, the length of the low-frequency radiator 643 is about 15mm, the length of the high-frequency radiator 642 is about 8mm, and the length of the coplanar waveguide line 64 extending from a position other than the ground metal surface 68 is about 7mm, and The antenna is operated in two frequency bands of 2 2 · 2 3 8 1 ~ 2 8.612.1 billion hertz (2.22381 ~ 2.86121GHz) and 49.4078 ~ 5.634 billion hertz (4.940 78 ~ 5.6 · 34GHz). Measure the return loss (Return Loss). The measurement results are shown in Figure 8. Both frequency bands are better than 9 decibels (dB). Therefore, the results of these measurements show that the planar dual-band L-shaped antenna designed by the present invention can indeed be used to receive the American Institute of Electronic and Electrical Engineers (IEEE) 802. 丨 13 Agreement and the American Electronic and Electrical Engineers, respectively. Association (IEEE) 802 ·· dual-band signals as specified in the lib agreement. The above description is only a preferred embodiment of the present invention. However, the scope of the rights claimed by the present invention is not limited to this.

1232612 五、發明說明（8) 化，均應屬不脫離本發明之保護範疇。圓_ 第12頁 1232612 圖式簡單說明圖式簡單說明：第1圖係傳統L型天線之示意圖；第2圖係傳統微帶式L型天線之示意圖；第3圖係傳統共面波導式L型天線之示意圖；第4 圖係本發明之一最佳實施例之示意圖；第5圖係本發明之另一最佳實施例之示意圖；第6圖係本發明之又一最佳實施例之示意圖；第7圖係本發明之又另一最佳實施例之示意圖；第8圖係根據第6圖所提供之天線，實際量測之結果。1232612 V. Description of the invention (8) The invention shall all belong to the protection scope of the present invention.圆 _ Page 12 1232612 Schematic illustrations Schematic illustrations: Figure 1 is a schematic diagram of a traditional L-shaped antenna; Figure 2 is a schematic diagram of a traditional microstrip L-shaped antenna; Figure 3 is a traditional coplanar waveguide L Figure 4 is a schematic diagram of a preferred embodiment of the present invention; Figure 5 is a schematic diagram of another preferred embodiment of the present invention; Figure 6 is another preferred embodiment of the present invention. Schematic diagram; Figure 7 is a schematic diagram of yet another preferred embodiment of the present invention; Figure 8 is the actual measurement results based on the antenna provided in Figure 6.

主要部份之代表符號：The main symbols:

介電質基板47 微帶線44 訊號饋入端4 4 1 接地金屬面4 8 輻射體442、443 介電質基板57 共面波導線54 訊號饋入端5 4 1 接地金屬面5 8 輻射體542、543 共面波導線6 4 輻射體642、643 接地金屬面6 8Dielectric substrate 47 Microstrip line 44 Signal feed terminal 4 4 1 Ground metal surface 4 8 Radiator 442, 443 Dielectric substrate 57 Coplanar waveguide line 54 Signal feed terminal 5 4 1 Ground metal surface 5 8 Radiator 542, 543 Coplanar waveguide line 6 4 Radiator 642, 643 Ground metal surface 6 8

第13頁 1232612Page 13 1232612

第14頁Page 14

Claims

12326121232612

、一種平面式雙頻L型天線，包括· 一介電質基板； · 上二==微帶線係印製在該介電質基板之 ^ 知係作為訊號饋入端；接地金屬面，该接地金屬面係印|y A % a 對應於該微帶線之另一側面上； p衣在该介電質基板二輻射體，各該輻射體係由該微帶於該接地金屬面以外之位置延伸，並： = 向對應分別延伸出之一輻射體。〃.、、，向軸向兩側所 2、如申請專利範圍第1項所述之天綠 =該接地金屬面以外之該微帶線至各該輕射== 長度，約分別等於雙頻段中各頻段波長之四分之一 +产 3、如巾請專利範圍第！項戶斤述之天、線，&中該微g線可為一呈彎折延伸之長條狀。 4、如申請專利範圍第1項所述之天線，其中該微帶線可由其縱向軸在不同位置向兩侧分別延伸出各該輻射體。 5、一種平面式雙頻L型天線，包括：一介電質基板；一共面波導線，該共面波導線係印製在該介電質基板之一側面上，其一端係作為訊號饋入端；一接地金屬面，該接地金屬面係、印製在該介電質基板上與該共面波導線同一側面之周緣位置上’且與該共面波導線保持一定間隔；二輻射體，各該輻射體係由該共面波導線之另一端向A planar dual-band L-shaped antenna, including: a dielectric substrate; the upper two == microstrip lines are printed on the dielectric substrate as the signal feeding end; the ground metal surface, the The ground metal surface is printed with | y A% a corresponding to the other side of the microstrip line; p is coated on the dielectric substrate two radiators, and each of the radiation systems is located by the microstrip outside the ground metal surface Extend and: = Extend one radiator to the corresponding one. 〃. ,,, to both sides of the axis 2. As described in item 1 of the scope of the patent application, the sky green = the microstrip line other than the grounded metal plane to each of the light shots = = length, approximately equal to the dual band respectively One quarter of the wavelength in each frequency band + production 3, such as towel please patent scope! The line and line described by Xiang Hu Jin, the micro-g line in & may be a long strip that is bent and extended. 4. The antenna according to item 1 of the scope of the patent application, wherein the microstrip line can be extended from the longitudinal axis of the radiator to the two sides at different positions. 5. A planar dual-band L-shaped antenna, comprising: a dielectric substrate; a coplanar waveguide line, the coplanar waveguide line is printed on one side of the dielectric substrate, and one end thereof is fed as a signal A ground metal surface, which is printed on the dielectric substrate at the peripheral edge position on the same side of the coplanar waveguide line and maintains a certain distance from the coplanar waveguide line; two radiators, Each of the radiation systems is directed from the other end of the coplanar waveguide line

1232612 六、申請專利範圍該接地金屬面以外之位置延伸，並由其縱向軸向兩側所分別延伸出之一輻射體。 6、如申請專利範圍第5項所述之天線，其中延伸在該接地金屬面以外之該共面波導線至各該輻射體自由端之長度，約分別等於雙頻段中各頻段波長之四分之一長度。 7、如申請專利範圍第5項所述之天線，其中該共面波導線可為一呈彎折延伸之長條狀。 8、如申請專利範圍第5項所述之天線，其中該共面波導線可由其縱向轴在不同位置向兩側分別延伸出各該輻射體。1232612 VI. Scope of patent application The radiator extends beyond the grounded metal surface and extends from both sides of its longitudinal axis. 6. The antenna as described in item 5 of the scope of patent application, wherein the length of the coplanar waveguide line extending beyond the ground metal plane to the free end of each of the radiators is approximately equal to four quarters of the wavelength of each frequency band in the dual frequency band. One length. 7. The antenna according to item 5 of the scope of patent application, wherein the coplanar wave conductor may be a long strip that extends in a bent manner. 8. The antenna according to item 5 of the scope of the patent application, wherein the coplanar wave conductor can extend each of the radiators from its longitudinal axis at different positions on both sides.

第16頁Page 16