200847524 九、發明說明： 【發明所屬之技術領域】 本發明係有關於—種小型化三頻菱形 線，利用菱形輻射金屬和接地^ 、 / ^ 達到良好的阻抗匹配；而盆 =口製造輕合效應， L v t _ /、主要係在輻射金屬片與接地面 7刀別設有對稱的第—槽縫及第二槽縫，即可抑制掉不必 要之頻帶，以達到三頻之效果。 【先前技術】 近年來無線通訊已在生活中成為不可或缺的科技，如 _、筆記型電腦、3G手機等’為達到無線傳輸的需求， 通訊頻段必需多頻和寬頻，即未來會大量被應用的腿Αχ 和=通訊協定’而目前大部份的作法為要增加通訊頻段 和頻寬就必彡頁增加天線的數目或以寬頻天線來涵蓋操作 頻段；而在習知天線設計上，大多的天線體積都較大佔 電路中很大的面積’對現今輕薄短小的無線通訊產品來 說’無疑是不太適用的，應用於小型化超寬頻天線的體 僅有34x17x0· 8mm3,而應用於WIMAX規格的三頻天線體貝 僅有46x24x0· 8mm3，但寬頻天線須加入濾波器來抑制2積 需要的操作頻段，造成了製造程序複雜、成本增加、不 量增加。 ^ 【發明内容】 爰此，習知的收細膜襟籤於製造使用時具有、 點，故本發明係為〆種小型化三頻菱形共面波導弋天比缺 5 200847524 其係在於微波基板，該微波基波上形成有菱形之輻射金屬 片，該輻射金屬片之下端分別設有相對稱之接地面，該二 接地面上相對稱設有矩形之缺口，又於輻射金屬片的上端 - 二侧分別設有對稱之倒L形的第一槽縫。 上述該接地面上方平行於缺口之方向，分別設有對稱 之I形的第二槽縫。。 上述該第一槽縫及第二槽縫之寬度均為lmm，又第一槽 ， 縫長度設為13腿時，而第二槽縫的長度設為1〇匪時。 上述該第一槽縫其長度為7mm。 本發明具有下列功效： 1·本發明具有小型化、高增益和良好的輻射場型特 ▲眭’故對於學術或商業上的考量都有幫助。 、2·本發明與習知天線比較，具有較寬的阻抗頻寬及較 =天線尺寸’且在朗金屬片中加人兩條槽縫來抑制掉 =之頻段，使原本超寬頻天線可節省下纽器的成本。 •本發明具有更寬的操作頻帶，可涵蓋更多的無線通 %用，騎設計上較容易製造，簡單而不失其功能性。 ㈣η本發明是印刷式構造，具有重量輕、低姿態（1⑽ [實式t成本及容易與射頻電路系統做整合等優點。 以首,先，請參閱第一圖所示，本發明主要係設有一微波 二丨’該微波基板⑴上形成有-菱形 之輻射金屬片 从Μ# (11)之下端分別設有相對稱之接地面 6 200847524 (12) ，該二接地面（12)上的相對稱位置處設有矩形之缺口 (13) ，又於輻射金屬片（11)的上端二側向饋入端分別設有 一個對稱之倒L形的第一槽縫（14)，另由接地面（12)上方平 行於缺口之方向，分別設有對稱之〗形的第二槽缝（15)。 本發明係將微波基板（1)、菱形之輻射金屬片（11)及對 稱之接地面（12)，同時印製在一相對介電常數為= 4· 4，損耗正切（i〇ss tangent)為〇· 〇245，厚度為丨〇 = 〇· 8随 及面積為46mm X 24mm的FR4板上，同時50歐姆的共面波導 饋入線則從天線主體中央沿著2軸筆直的饋入，饋入的微帶 線見度為6· 2mm;主要係在於接地面（12)上的兩個對稱矩 $缺口（13)，然後選擇一個適當的尺寸，將會使的特定頻 π内之阻到影響，再經由調整5隨姆的共面波導饋入 二長度即可達到良好的阻抗匹配，如此即可形成一個寬頻 天線此時其頻段涵蓋2.43〜HGHz;然後分別在輻 縫（14)= LU)和接地面（12)中分別設有兩個對稱的第一槽 之寶庚沾、一槽縫（15)，而該第一槽縫（14)及第二槽縫（15) (14) 及裳為Μ"1由於要抑制掉兩個頻段，所以該第一槽縫 三個頻段因此不—樣’如此更符合舰x 時，則二〃中#JL形之第—槽縫（⑷長度設為13mm 縫（15) J長掉产低頻^2·96〜3.25GHZ)的頻段，而第二槽 (3.92〜5 l2tH為胸時，則可抑制掉高頻 導式天線的反段’第二圖則為此三頻菱形共面波 貝圖，其中實線代表實驗量測的結果， 7 200847524 虛線則為軟體模擬分析的結果，此三個頻段（2.25〜2· 97， 3· 25〜3·92，5· 12〜6 t GHz)是非常符合WIMAX技術之操作 頻段，而第三圖、第四圖及第五圖分別為操作頻率在 2· 5GHz、3· 5GHz和5· 5GHz時，•面和X-Y平面上的同極 化和交差極化遠場輻射場形實驗量測結果，其中實線表示 為CO-P0L(同極化），虛線表示為X— P0L(交叉極化），且從 這些輻射場形的結果顯示本發明所述天線具有不錯的主極 化幸备射’且為常用的垂向輻射（broadside radiation )， 又第六圖、第七圖及第八圖分別為三個頻段天線增益圖， 由圖中可知三個頻段的天線最大增益值分別為3. 〇7、2. 65 及5· 56dBi ’除了满足WiMAX系統高增益的須求，並且有更 小更輕薄的體積。 本發明另一實施例，如第九圖所示，主要係設有一微 波基板（1A)，該微波基波（ία)上形成有一菱形之輻射金屬 片（11A)，該輻射金屬片（11A)之下端分別設有相對稱之接 地面（12A)，該二接地面（12A)上的相對稱位置處設有矩形 之缺口（13A),又於輕射金屬片（η a)的上端二侧向饋入端 分別設有一個對稱之倒L形的第一槽縫（14A)，。 本發明係將微波基板（1A)、菱形之輻射金屬片（11A)及 對稱之接地面（12A),同時印製在一介電係數為4· 4，板厚 為0.8mm的FR4板，損耗正切（i〇ss tangent)為0 0245， 而其面積31為34mmXl7mm ’而其50歐姆共面波導饋入線沿著 Z軸筆直饋入其寬為3· 4mm,而饋入線旁為兩個對稱的接地 200847524 面（12A)，而產生寬頻操作的設計在於接地面（i2a)上的矩 形=口（13A)，選擇適當的長度和寬度可達到超寬頻的阻抗 頻寬要求’而最上方為天線輻射主體菱形之輻射金屬片 (11A) ’ 其為了達到抑制掉IEEE8〇211a (5 i5hwhz) 之已使用到的頻段來降底其之間的干擾，故在菱形 ^ ^屬片（11A)上設有二個對稱式的型的第一槽"縫 14«，其長度為7mm’可有效的抑制掉5.25 5._^頻 二’如第十圖所示’為其反射損失圖，第十1則為㈣ 盈隨頻率^變的天線增益圖，其中之實 有曰 燐鲶,1 η、 & J衣不ά又有第一 、 ），而虛線則表示未設有第一槽縫（1 Μ);而第十 二圖、第十三圖及第十四圖則為其實驗結果㈣射場型圖 、3. 1GHz、7.5呢和10.6·，分別含有χ ζ平面和χ γ平 面’其中實線表示為C〇-P〇L(同極化），虛線表示為x_p〇L(交 叉極化）。 因此本發明在應用於WI的天線中，在輕射金屬片與 =地面上分別設有對稱的第-槽縫及第二槽縫，即可抑制 :必要之頻帶，達到三頻之效果，不須要額外加入滤波 =濾掉不必要之驗，更可降低縣，而且在麵應用的 大線中，也以同樣的做法達到抑制頻段的效果，即除了體 重量輕..等等功效外，更有良好的輻射特性，此設 &法使得菱形天線在多種通訊規格下皆可達到良好的應 用0 【圖式簡單說明】 200847524 第一圖係為本發明之構造示意圖。 第二圖係為本發明之三頻菱形共面波導式天線的反射損失 圖。 第三圖係為本發明操作頻率在2· 5GHz時，χ〜ζ平面和χ—γ平 面上的同極化和交差極化遠場輻射場形實驗量測結 果不意圖。 第四圖係為本發明操作頻率在3 5GHz時，χ〜ζ平面和Χ-Υ平 面上的同極化和交差極化遠場輻射場形實驗量測結 果示意圖。 第五圖係為本發明操作頻率在5.5GHz時，χ_ζ平面和χ γ平 面上的同極化和交差極化遠場輻射場形實驗量測結 果示意圖。 第六圖係為本發明頻段的天線具有最大増益值為3. 07dBi 的示意圖。 第七圖係為本發明頻段的天線具有最大增益值為2· 的不意圖。 第八圖係為本發明頻段的天線具有最大增益值為& π仙i 的示意圖。 第九圖係為本發明另一實施例之構造示意圖。 第十圖係為本發明另一實施例之反射損失圖。 第十一圖係為本發明另一實施例之增益隨頻率而變的天線 增益圖。200847524 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a miniaturized tri-band diamond line that utilizes diamond-shaped radiation metal and grounding ^, /^ to achieve good impedance matching; The effect, L vt _ /, is mainly based on the symmetrical first slot and the second slot in the radiating metal piece and the ground plane 7 to suppress unnecessary frequency bands to achieve the effect of tri-band. [Prior Art] In recent years, wireless communication has become an indispensable technology in life, such as _, notebook computers, 3G mobile phones, etc. In order to meet the needs of wireless transmission, the communication frequency band must be multi-frequency and wide-band, that is, a large number of future The application of the leg Αχ and = communication protocol' and most of the current practice is to increase the communication frequency band and bandwidth to increase the number of antennas or to cover the operating frequency band with a wide-band antenna; and in the conventional antenna design, most The large size of the antenna occupies a large area in the circuit's. For today's thin and short wireless communication products, it is undoubtedly not suitable. The body used for miniaturizing ultra-wideband antennas is only 34x17x0·8mm3. The WIMAX specification tri-band antenna body is only 46x24x0·8mm3, but the broadband antenna must be added with a filter to suppress the operating frequency band required for the second product, resulting in complicated manufacturing procedures, increased cost, and no increase. ^ [Summary of the Invention] As a result, the conventional thin film enamel has a point in manufacturing, so the present invention is a miniaturized tri-frequency diamond coplanar waveguide, which is based on a microwave substrate. a diamond-shaped radiating metal piece is formed on the microwave fundamental wave, and the lower end of the radiating metal piece is respectively provided with a symmetrical ground plane, and the two grounding surfaces are oppositely provided with a rectangular notch, and at the upper end of the radiating metal piece - The two sides are respectively provided with a symmetrical inverted L-shaped first slot. The above grounding surface is parallel to the direction of the notch, and is respectively provided with a symmetrical I-shaped second slot. . The first slot and the second slot have a width of 1 mm, and the first slot has a slot length of 13 legs, and the length of the second slot is 1 。. The first slot described above has a length of 7 mm. The present invention has the following effects: 1. The present invention has miniaturization, high gain, and good radiation field characteristics, which are useful for academic or commercial considerations. 2. Compared with the conventional antenna, the present invention has a wider impedance bandwidth and a smaller than the antenna size 'and adds two slots in the Lang metal sheet to suppress the frequency band, so that the original ultra-wideband antenna can be saved. The cost of the button. • The invention has a wider operating frequency band and can cover more wireless communication. The riding design is easier to manufacture and simple without losing its functionality. (4) η The invention is a printed structure, which has the advantages of light weight and low posture (1 (10) [real cost and easy integration with radio frequency circuit system. First, first, please refer to the first figure, the main system of the present invention There is a microwave diode 丨 on the microwave substrate (1) formed with a diamond-shaped radiating metal piece from the lower end of the Μ # (11) respectively provided with a symmetrical ground plane 6 200847524 (12), the phase on the two ground planes (12) A rectangular notch (13) is arranged at the symmetrical position, and a symmetric first inverted L-shaped first slot (14) is respectively arranged on the feeding end of the upper end of the radiating metal piece (11), and the grounding surface is further provided. (12) The upper side is parallel to the direction of the notch, and is respectively provided with a symmetrical shape of the second slot (15). The invention is a microwave substrate (1), a diamond-shaped radiating metal piece (11) and a symmetrical ground plane ( 12), simultaneously printed on a FR4 board with a relative dielectric constant = 4. 4, loss tangent (i〇ss tangent) 〇· 〇245, thickness 丨〇 = 〇·8 with an area of 46mm X 24mm The 50 ohm coplanar waveguide feed line is fed straight from the center of the antenna body along the 2 axes. The microstrip line visibility is 6.2 mm; mainly due to the two symmetrical moments of the ground plane (12), the notch (13), and then selecting an appropriate size will cause the resistance within the specific frequency π to be affected. Then, by adjusting the 5 lengths of the coplanar waveguides to achieve a good impedance matching, a wideband antenna can be formed at this time, and its frequency band covers 2.43~HGHz; then respectively in the spoke (14) = LU) And the grounding surface (12) are respectively provided with two symmetrical first grooves, a gauze dip, a slot (15), and the first slot (14) and the second slot (15) (14) and The skirt is Μ"1 Because the two bands are to be suppressed, the three slots of the first slot are therefore not the same - so more in line with the ship x, then the #JL shape of the second slot - slot ((4) length setting For the 13mm slot (15) J long drop of the low frequency ^2·96~3.25GHZ) frequency band, and the second slot (3.92~5 l2tH for the chest, it can suppress the reverse section of the high frequency guided antenna' second The plan is a three-frequency diamond coplanar wave map, where the solid line represents the experimental measurement results, 7 200847524 dotted line is the result of the software simulation analysis, the three frequencies (2.25~2·97, 3·25~3·92, 5·12~6 t GHz) is very compatible with the operating band of WIMAX technology, while the third, fourth and fifth figures are respectively operating frequency 2 · At 5 GHz, 3.5 GHz, and 5·5 GHz, the results of the same-polarization and cross-polarization far-field radiation field measurements on the surface and the XY plane, where the solid line is expressed as CO-P0L (co-polarization), The dashed lines are denoted as X-POL (cross-polarization), and the results from these radiation field shapes show that the antenna of the present invention has a good main polarization fortunately, and is a commonly used broadside radiation, and The six, seventh and eighth diagrams are the three-band antenna gain maps. It can be seen from the figure that the maximum gain values of the three frequency bands are 3. 〇7, 2.65 and 5·56dBi 'except for the WiMAX system. High gain is required, and there is a smaller, thinner and lighter volume. Another embodiment of the present invention, as shown in the ninth figure, is mainly provided with a microwave substrate (1A) having a diamond-shaped radiating metal piece (11A) formed on the microwave fundamental wave (11a), the radiating metal piece (11A) The lower end is respectively provided with a symmetrical ground plane (12A), and the symmetrical position on the two ground planes (12A) is provided with a rectangular notch (13A), and on the upper two sides of the light-emitting metal piece (η a) A symmetrical inverted L-shaped first slot (14A) is respectively provided to the feed end. The invention relates to a microwave substrate (1A), a diamond-shaped radiating metal piece (11A) and a symmetrical ground plane (12A), which are simultaneously printed on a FR4 plate having a dielectric constant of 4.4 and a plate thickness of 0.8 mm, and the loss is performed. The tangent (i〇ss tangent) is 0 0245, and its area 31 is 34mm×l7mm 'and its 50 ohm coplanar waveguide feed line is fed straight along the Z axis into its width of 3.4 mm, while the feed line is two symmetrical. Grounding 200847524 face (12A), and the design of wide-band operation is based on the rectangular surface of the ground plane (i2a) = port (13A), the appropriate length and width can be selected to achieve ultra-wideband impedance bandwidth requirements 'and the top is the antenna radiation The main diamond-shaped radiating metal piece (11A)' is designed to suppress the interference between the used frequency bands of IEEE8〇211a (5 i5hwhz), so it is provided on the diamond-shaped piece (11A). The first groove of the two symmetrical type "slot 14«, its length is 7mm' can effectively suppress 5.25 5._^ frequency two ' as shown in the tenth figure' for its reflection loss map, the tenth Then, it is (4) the antenna gain graph with the gain and frequency change, which is actually flawed, 1 η, & J 1)), and the dotted line indicates that the first slot (1 Μ) is not provided; and the twelfth, thirteenth and fourteenth pictures are the experimental results (4) the field pattern, 3. 1 GHz, 7.5 And 10.6·, respectively, contain the χ ζ plane and the χ γ plane, where the solid line is denoted as C〇-P〇L (co-polarization) and the dashed line is denoted by x_p〇L (cross polarization). Therefore, in the antenna applied to the WI, the symmetrical first slot and the second slot are respectively disposed on the light-emitting metal piece and the ground, thereby suppressing the necessary frequency band and achieving the effect of the three-frequency, Need to add additional filtering = filter out unnecessary tests, but also reduce the county, and in the large line of surface applications, the same way to achieve the effect of suppressing the frequency band, that is, in addition to the weight of the body. With good radiation characteristics, this method makes the diamond antenna achieve good application under various communication specifications. [Simplified illustration] 200847524 The first figure is a schematic diagram of the structure of the present invention. The second figure is a reflection loss diagram of the tri-band rhombic coplanar waveguide antenna of the present invention. The third figure is not intended for the experimental measurements of the co-polarization and cross-polarization far-field radiation field modes on the χ~ζ plane and the χ-γ plane when the operating frequency of the invention is 2.5 GHz. The fourth figure is a schematic diagram of the measured results of the same-polarized and cross-polarized far-field radiation field shape on the χ~ζ plane and the Χ-Υ plane at the operating frequency of the invention at 35 GHz. The fifth figure is a schematic diagram of the experimental results of the same-polarization and cross-polarization far-field radiation field shape on the χ_ζ plane and the χ γ plane at the operating frequency of the invention at 5.5 GHz. The sixth figure is a schematic diagram of the antenna of the frequency band of the present invention having a maximum benefit value of 3.07dBi. The seventh figure is the intention that the antenna of the frequency band of the present invention has a maximum gain value of 2·. The eighth figure is a schematic diagram of the antenna of the frequency band of the present invention having a maximum gain value of & π centimeter. The ninth drawing is a schematic view showing the configuration of another embodiment of the present invention. The tenth figure is a reflection loss diagram of another embodiment of the present invention. The eleventh diagram is an antenna gain diagram in which the gain varies with frequency according to another embodiment of the present invention.
第十二圖係為本發明另一實施例操作頻率在3.1GHz時，X-Z 200847524 平面和χ-γ平面上的同極化和交差極化遠場輻射 場形實驗量測結果不意圖。 第十三圖係為本發明另一實施例操作頻率在7.5GHz時，X-Ζ 平面和X-Y平面上的同極化和交差極化遠場輻射 場形實驗量測結果示意圖。 第十四圖係為本發明另一實施例操作頻率在10.6GHz時， X-Z平面和X-Y平面上的同極化和交差極化遠場 輻射場形實驗量測結果示意圖。 【主要元件符號說明】 (1) 微·波基板 (11) 輻射金屬片 (12) 接地面 (13) 缺口 (14) 第一槽縫 (15) 第二槽縫 (1A) 微波基板 (11A) 輻射金屬片 (12A) 接地面 (13A) 缺口 (14A) 第一槽縫 11The twelfth figure is not intended to be an experimental measurement result of the co-polarization and cross-polarization far-field radiation field modes on the X-Z 200847524 plane and the χ-γ plane when the operating frequency is 3.1 GHz according to another embodiment of the present invention. The thirteenth figure is a schematic diagram showing experimental results of the same-polarized and cross-polarized far-field radiation field modes on the X-Ζ plane and the X-Y plane at an operating frequency of 7.5 GHz according to another embodiment of the present invention. Figure 14 is a schematic diagram showing experimental results of the same-polarization and cross-polarization far-field radiation field modes on the X-Z plane and the X-Y plane at an operating frequency of 10.6 GHz according to another embodiment of the present invention. [Description of main component symbols] (1) Micro-wave substrate (11) Radiation metal sheet (12) Ground plane (13) Notch (14) First slot (15) Second slot (1A) Microwave substrate (11A) Radiant metal sheet (12A) Ground plane (13A) Notch (14A) First slot 11