1356529 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種具全向性韓射之交叉單極天 線，尤其是指一種可同時抑制兩個頻帶之十字形單極天 線，其提供了超寬頻的操作頻帶，以及多抑制頻帶的帶拒 操作，且完全不影響其全向性輻射，可涵蓋更多的無線通 訊應用，相當適合應用於橋接點天線及超寬頻系統等。 【先前技術】 現今無線通訊在生活中已是不可或缺的，如PDA、筆 記型電腦、3G手機...為達到無線傳輸的需求，生活中隨處 可見的通訊頻段已達多頻甚至寬頻，而要增加通訊頻段就 必須增加天線的數目或以寬頻天線來涵蓋多頻操作頻 段。隨著通訊頻段的增加，訊號干擾的問題亦如影隨形的 產生；例如：超寬頻系統之操作頻段為3.卜10. 6GHz，然 而此頻段會與無線區域網路（Wireless Local Area Networks，WLAN)的操作頻段5. 2〜5.8GHz相重疊，因此將 會產生訊號干擾等問題。於是在寬頻天線設計中，必須將 會與無線區域網路之操作頻段重疊的頻帶加以抑制；傳統 抑制頻帶的方法大多是在寬頻天線加入濾波器，藉濾波器 之設置來抑制掉不需要的操作頻段，然而此舉無疑會增加 成本。有鑑於此，近年來開始有人研究寬頻並兼具抑制頻 帶的天線設計（以下簡稱帶拒天線）來達到多頻操作頻段 以節省資源與降低成本的目的。 現階段之帶拒天線的設計在不增加寬頻通訊系統之 電路設計複雜度以及整體製作成本的前提下，可藉由在天 線輻射主體嵌入適當共振結構來產生可控制的抑制頻帶 5 1356529 操作，達成有效抑制超寬頻天線訊號干擾問題。常見的帶 拒天線可分為在平面單極天線上嵌入一個或二個以上的 槽孔或槽缝、在十字形單極天線上嵌入對稱的槽孔或槽 縫；前者雖可藉由嵌入槽孔或槽缝的數量來達到抑制單頻 帶或雙頻帶，然而在設計上需注意這兩個帶拒機制有沒有 互相干擾或耦合的問題產生，而導致無法有效的達到雙抑 .制頻帶的操作，並且受限於平面結構之特性，高頻操作時 因漣波效應易造成非全向性輻射。後者雖在高頻亦能維持 良好的全向性輻射，但由於其本身的天線架構，可嵌入槽 孔的部份等於單一金屬片單極天線的二分之一，因此目前 所見的十字形單極帶拒天線之研究，多是嵌入一個對稱簡 單的槽孔或槽缝，來達成單頻帶拒之目的。在通訊科技飛 速般的進步之今日，可見的是天線僅有單頻帶拒機制將不 敷使用。 【發明内容】 今，發明人即是鑒於上述現有之寬頻天線在實際實施 上仍具有多處之缺失，於是乃一本孜孜不倦之精神，並藉 由其豐富之專業知識及多年之實務經驗所輔佐，而加以改 善，並據此研創出本發明。 本發明之具全向性韓射之交叉單極天線的其一目 的，係在提供一種可抑制頻帶之十字形單極天線，其不論 在低頻或高頻操作皆能保持良好的全向性輻射，相當適合 應用在極需全向性輻射特性之橋接點天線上。 本發明之具全向性輻射之交叉單極天線的其二目 的，係在提供一種具有雙抑制頻帶之天線，其中在雙抑制 '頻帶中的低頻抑制頻帶已涵蓋無線區域網路之頻段，可應 用在有訊號干擾問題的超寬頻系統中。 本發明之具全向性輕射之交又單極天線的其三目 短’係在提供-種超寬頻的操作頻帶與多抑制頻帶的帶拒 二'作之天’緣i兀全不影響其全向性輻射可涵蓋更多的 ，，練通訊賴’相㈣合應詩橋接點天線及超寬頻系統 本發明之具全向性輻射之交又單極天線的目的與功 攻係由以下之技術所實現： 該具全向性輻射之蚊單極天㈣在_接地金屬面 央設穿孔’崎應穿設接馳裝天線主體，該天線主體 =兩矩形金屬片交叉重疊成立體十字形狀，且於交叉後所 ^之四㈣Μ的下方各裁切—角，使其下緣呈由外往 向下斜設，並在各片體部上嵌人h形槽孔，使天線主體 =有帶拒功能’將不需要的頻帶5.25GHZ〜5 85GHZ加以遽 二’另外還有-高頻帶拒特性可操作；據此，俾令該天線 ，有抑制錢之能力’奴可改善主體結構在高頻時所產 之建波效應，進而達成全方向性的效果。 【實施方式】 功致===術内容、發明目的及其達成之 极ί 清楚的揭1^下詳細說明之，並請- 併參閱所揭之圖式及圖號： 首先’第一圖所示者，係本發明直 又單極天線的立體結構示意圖；第射之父 性轄射之交叉單極天線的前視4;=本發明之具全向 該具全向性輻射之交又偶極天線具有—接 u)及一天線主體（2);其中： 獨卸 < s 7 1356529 該接地金屬面（1)係採用厚度為0.1mm、長、寬 120mmx 120mm為的金屬銅片，於該接地金屬面（1)中央設 一穿孔（11)，並使用一高頻50HSMA之接頭（12)自該穿孔 (11)下方饋入； 該天線主體（2)，係由二厚度同為〇.imm、長、寬為 30mmx30mm的矩形金屬銅片（21)構成，該二金屬銅片（21) 係彼此交叉扣合組裝而形成立體十字形狀，並據此區分成 四片體部（21a)〜（21d)，各片體部（21a)〜（21d)的下方各裁 切一角，使其下緣（211a)〜（21 Id)為由外往内向下斜設， 且在各片體部（21a)~(21d)上設一 h形槽孔 (212a)〜（212d) ’同時相對應的片體部（21a)與片體部（21c) 之h形槽孔（212a)、（212c)，以及相對應的片體部（21b) 與片體部（21d)上之h形槽孔（212b)、（212d)亦呈相對應 設置；此外，該天線主體（2)係垂直接設於接地金屬面 之接頭（12) ’並與接地金屬面（1)之間距為G=imm。 據此，在十字形天線主體（2)的各片體部（2ia)〜（2id) 上設置h形槽孔（212a)〜（212d)，可達到抑制雙頻帶之功 能。該h形槽孔（212a)〜（212d)共振長度約為〇. 5λ，λ是 真空中的導波波長。而第一抑制頻帶（低頻）之共振長度為 2L2+W2、第二抑制頻帶（高頻）之共振長度則為u ;其中 L1為h形槽孔（212a)~(212d)高度，L2為h形槽孔 (212a)〜（212d)下半段長度’S1為h形槽孔（212a)〜（212d) 對應十字形交叉線的距離’ S2為h形槽孔（212a)〜（212d) 與片體部（21a)〜（21d)頂端之距離，wi為h形槽孔 (212a)〜（212d)寬度，W2為h形槽孔（2i2a)〜（212d)内寬 度。 % S > 8 1356529 第三圖為本發明之具全向性輻射之交叉單極天線的 返回損失頻率響應圖；其中，粗線為實驗量測數據、細線 為Ansoft模擬軟體HFSS分析結果、雙細線為未設置h形 槽孔的十字形單極天線之量測數據。由圖可知實驗與模擬 數據是吻合的，且抑制頻帶在4. 85GHz〜6. 15GHz與 7· 13GHz〜7. 43GHz，其中第一抑制頻帶之返回損失抑制效 果約達4.3dB，並可完整涵蓋WLAN之操竹 第四圖:本發明之具全向性輕射之交叉; r η二=1 〇. ·Ζ時之遠場輻射場型量測結果。 ==雖置h形槽孔’但仍擁有非常良好的全向 ㈣射特性。弟五圖為本發明之具 天線在X-Z及y-z平面之增 2射之义又早極 到，在抑制頻帶之處，^，圖中可清楚看 其他頻段之w =曰曰有明顯的下降’除抑制頻段， 貝#又之增进變化量皆維持在3dBi以內。 交又的實施說明，可知本發明之具全向性輻射之 阻抗頻寬之外i /之又又早極天線除具有較寬的 以抑制掉不需it13咖），因在天線主體上設槽孔， 所需之遽波器，而可:低=不需再設置原本寬頻天線 2. 本發明^^低成本。 制，且於生輻射之交又單極天绫且士 ::到雙頭帶拒操作 線；有—帶拒機 政态之成本。 。，可節省二個濟 3. 本發明之具全 ^ 利案相〜天心專 :=:可抑制雙頻帶之二單 〜系相比#父，太级ηπ、— 尘丰橢圓天線，，專 1356529 且製作方面亦較簡單。 4.本發明之具全向性輻射之交叉單極天線因具有更寬的 操作頻帶，多抑制頻帶的帶拒操作，且完全不影響其全 向性輻射，可涵蓋更多的無線通訊應用，適合應用於橋 接點天線及超寬頻系統。 綜上所述，本發明實施例確能達到所預期之使用功 效，又其所揭露之具體構造，不僅未曾見諸於同類產品 中，亦未曾公開於申請前，誠已完全符合專利法之規定與 要求，爰依法提出發明專利之申請，懇請惠予審查，並賜 准專利，則實感德便。 10 1356529 【圖式簡單說明】 第一圖：本發明之具全向性輻射之交叉單極天線的立 體結構示意圖 第二圖：本發明之具全向性輻射之交叉單極天線的前 視結構示意圖 第三圖：本發明之具全向性輻射之交叉單極天線之返 回損失量測與模擬結果1356529 IX. Description of the Invention: [Technical Field] The present invention relates to a cross-monopole antenna with an omnidirectional Korean shot, and more particularly to a cross-shaped monopole antenna capable of suppressing two frequency bands simultaneously, which provides The ultra-wideband operating band and the multi-suppression band rejection operation do not affect its omnidirectional radiation at all, and can cover more wireless communication applications, and are suitable for use in bridge point antennas and ultra-wideband systems. [Prior Art] Today's wireless communication is indispensable in life, such as PDA, notebook computer, 3G mobile phone... In order to meet the needs of wireless transmission, the communication frequency bands that can be seen everywhere in life have reached multi-frequency or even broadband. In order to increase the communication frequency band, it is necessary to increase the number of antennas or to cover the multi-frequency operation frequency band with a wide-band antenna. As the communication frequency band increases, the problem of signal interference also occurs. For example, the operating frequency band of the ultra-wideband system is 3. 5 GHz. However, this band will be related to Wireless Local Area Networks (WLAN). Operating frequency bands 5.2 to 5.8 GHz overlap, so signal interference and other problems will occur. Therefore, in the design of the wideband antenna, the frequency band overlapping with the operating band of the wireless local area network must be suppressed; the conventional method of suppressing the frequency band is mostly to add a filter to the broadband antenna, and the setting of the filter is used to suppress unnecessary operations. The frequency band, however, will undoubtedly increase costs. In view of this, in recent years, some people have studied the broadband design and the antenna design (hereinafter referred to as the rejection antenna) to achieve the multi-frequency operation band to save resources and reduce costs. At present, the design of the rejection antenna can achieve the controllable suppression band 5 1356529 operation by embedding the appropriate resonance structure in the antenna radiation body without increasing the circuit design complexity of the broadband communication system and the overall fabrication cost. Effectively suppress the interference problem of ultra-wideband antenna signals. Common repellent antennas can be divided into one or more slots or slots embedded in a planar monopole antenna, and symmetric slots or slots embedded in a cross-shaped monopole antenna; the former can be embedded in the slot. The number of holes or slots is such as to suppress single-band or dual-band. However, it is necessary to pay attention to whether the two rejection mechanisms have mutual interference or coupling problems, which makes it impossible to effectively achieve double-inhibition. And limited by the characteristics of the planar structure, high frequency operation is easy to cause non-omnidirectional radiation due to the chopping effect. The latter maintains good omnidirectional radiation at high frequencies, but due to its antenna architecture, the portion that can be embedded in the slot is equal to one-half of the single metal monopole antenna, so the cross-shaped single seen so far The study of the pole-rejected antenna is mostly embedded in a symmetrical and simple slot or slot to achieve the purpose of single-band rejection. Today, with the rapid advancement of communication technology, it can be seen that the antenna only has a single-band rejection mechanism that will not be used. SUMMARY OF THE INVENTION Nowadays, the inventor is in view of the fact that the above-mentioned existing wideband antennas still have multiple defects in practical implementation, so it is a tireless spirit, and is supported by its rich professional knowledge and years of practical experience. And improved, and based on this, the present invention was developed. One object of the omnidirectional Korean cross-monopole antenna of the present invention is to provide a cross-shaped monopole antenna capable of suppressing a frequency band, which can maintain good omnidirectional radiation regardless of low frequency or high frequency operation. It is quite suitable for use on bridge antennas where omnidirectional radiation characteristics are highly desirable. The second object of the omnidirectional radiation cross-monopole antenna of the present invention is to provide an antenna with dual suppression bands, wherein the low-frequency suppression band in the dual suppression band has covered the frequency band of the wireless local area network, It is used in ultra-wideband systems with signal interference problems. The three-eye short of the omnidirectional light-emitting and monopole antenna of the present invention does not affect the operation band of the ultra-wideband and the multi-rejection band. Its omnidirectional radiation can cover more, the communication communication Lai's phase (four) commencing poetry bridge contact antenna and ultra-wideband system. The purpose of the omnidirectional radiation and monopole antenna of the present invention is the following The technology realizes: The omnidirectional radiation of the mosquito monopole (4) in the _ grounding metal surface of the central end of the perforation 'should should wear the extension of the antenna body, the antenna body = two rectangular metal pieces overlap overlapping to form the body cross shape And under the intersection of the four (four) Μ below each cutting-angle, so that the lower edge is obliquely set from the outside to the downward, and embedded in the body of each piece h-shaped slot, so that the antenna body = have With the rejection function 'will not need the frequency band 5.25GHZ~5 85GHZ to 遽 two' also have - high-band rejection characteristics can be operated; accordingly, the antenna is ordered to have the ability to suppress money' slaves can improve the main structure at high The wave-forming effect produced by the frequency achieves an omnidirectional effect. [Embodiment] Gongzhi === The content of the operation, the purpose of the invention and the ultimate goal of the invention are clearly explained. Please refer to the figure and figure number: First of all, the first figure The present invention is a schematic view of the three-dimensional structure of the straight and monopole antenna of the present invention; the front view of the crossed monopole antenna of the first shot of the first shot; the omnidirectional radiation of the omnidirectional radiation and the dipole of the present invention The antenna has a connecting body u) and an antenna body (2); wherein: the sole unloading < s 7 1356529 the grounding metal surface (1) is a metal copper piece having a thickness of 0.1 mm, a length and a width of 120 mm x 120 mm, A through hole (11) is arranged in the center of the grounded metal surface (1), and is fed from below the through hole (11) by using a high frequency 50HSMA joint (12); the antenna body (2) is composed of two thicknesses. A rectangular metal copper sheet (21) having an imm length and a width of 30 mm x 30 mm is formed. The two metal copper sheets (21) are cross-fitted to each other to form a three-dimensional cross shape, and are thereby divided into four body portions (21a). (21d), each of the body portions (21a) to (21d) is cut at a lower corner so that the lower edges (211a) to (21 Id) are outwardly It is inclined downward, and an h-shaped slot (212a) to (212d) is disposed on each of the body portions (21a) to (21d), and the corresponding body portion (21a) and the body portion (21c) are simultaneously provided. The h-shaped slots (212a), (212c), and the corresponding body portion (21b) are correspondingly arranged with the h-shaped slots (212b) and (212d) on the body portion (21d); The antenna body (2) is vertically connected to the grounding metal surface of the joint (12)' and has a distance G=imm from the grounded metal surface (1). According to this, by providing the h-shaped slots (212a) to (212d) in the respective body portions (2ia) to (2id) of the cross-shaped antenna main body (2), the function of suppressing the dual band can be achieved. The h-shaped slots (212a) to (212d) have a resonance length of about 〇. 5λ, λ is the wavelength of the guided wave in the vacuum. The resonance length of the first suppression band (low frequency) is 2L2+W2, and the resonance length of the second suppression band (high frequency) is u; where L1 is the height of the h-shaped slot (212a)~(212d), and L2 is h The slot holes (212a) to (212d) the lower half length 'S1 is the h-shaped slot (212a) ~ (212d) corresponding to the cross-shaped intersection line 'S2 is the h-shaped slot (212a) ~ (212d) and The distance between the top ends of the body portions (21a) to (21d), wi is the width of the h-shaped slots (212a) to (212d), and W2 is the width of the h-shaped slots (2i2a) to (212d). % S > 8 1356529 The third figure is the return loss frequency response diagram of the omnidirectional radiation cross monopole antenna of the present invention; wherein the thick line is the experimental measurement data, the thin line is the Ansoft simulation software HFSS analysis result, double The thin line is the measurement data of the cross-shaped monopole antenna without the h-shaped slot. It can be seen from the figure that the experimental and analog data are in agreement, and the suppression band is 4.85 GHz to 6.15 GHz and 7.3 GHz to 7.43 GHz, wherein the return loss suppression effect of the first suppression band is about 4.3 dB, and can be completely covered. The fourth figure of WLAN operation: the cross of the omnidirectional light shot of the present invention; r η二=1 〇. · The far field radiation field measurement result of Ζ. == Although the h-shaped slot is placed, it still has very good omnidirectional (four) characteristics. The fifth figure of the invention is that the antenna of the invention has an increase of two shots in the XZ and yz planes, and it is very early. In the suppression band, ^, in the figure, it can be clearly seen that w = 曰曰 has a significant drop in other frequency bands' In addition to suppressing the frequency band, the increase in the amount of the increase in the Bay #3 is maintained within 3dBi. According to the implementation description of the crossover, it can be seen that the impedance bandwidth of the omnidirectional radiation of the present invention is different from that of the i/th and the early pole antenna in addition to having a wider width to suppress it, because the antenna body is provided with a groove. Hole, the required chopper, but can be: low = no need to set the original broadband antenna 2. The invention is low cost. System, and at the turn of the radiation and unipolar Scorpio and the :: to the double-headed belt to refuse the operation line; there is - the cost of the government. . It can save two jins. 3. The invention has the full ^Lian phase ~ Tianxin special: =: can suppress the double band of the two single ~ system compared to #父, too grade ηπ, - dusty elliptical antenna, special 1356529 And the production is also relatively simple. 4. The cross-monopole antenna with omnidirectional radiation of the present invention can cover more wireless communication applications because it has a wider operating frequency band, multiple rejection band rejection operations, and does not affect its omnidirectional radiation at all. Suitable for bridge point antennas and ultra-wideband systems. In summary, the embodiments of the present invention can achieve the expected use efficiency, and the specific structure disclosed therein has not been seen in similar products, nor has it been disclosed before the application, and has completely complied with the provisions of the Patent Law. And the request, the application for the invention of a patent in accordance with the law, please forgive the review, and grant the patent, it is really sensible. 10 1356529 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a three-dimensional structure of a cross-monopole antenna having omnidirectional radiation according to the present invention. FIG. 2 is a front view showing a cross-monopole antenna having omnidirectional radiation according to the present invention. Schematic diagram of the third diagram: the return loss measurement and simulation results of the crossed monopole antenna with omnidirectional radiation of the present invention
第四圖：本發明之具全向性輻射之交叉單極天線之遠 場輻射場型量測結果 第五圖：本發明之具全向性輻射之交叉單極天線在 (a)x-z及（b)y-z平面之增益量測結果 【主要元件符號說明】 (1) 接地金屬面（11) 穿孔 (12) 接頭 （2) 天線主體 (21) 金屬銅片 （21a)〜（21d) 片體部 (211a)〜（211d)下緣 （212a)〜（212d)槽孔Figure 4: Far field radiation field measurement results of the crossed monopole antenna with omnidirectional radiation of the present invention. Fifth figure: The cross monopole antenna with omnidirectional radiation of the present invention is at (a) xz and ( b) Gain measurement result of yz plane [Description of main component symbols] (1) Grounded metal surface (11) Perforated (12) Connector (2) Antenna body (21) Metal copper piece (21a) ~ (21d) Sheet part (211a) ~ (211d) lower edge (212a) ~ (212d) slot