490888 A7 B7 經濟部中央標準局員工消費合作社印製 五、發明說明（1) 隨著無線通訊的廣泛使用，各種不同特性的天線需求 也跟著增加，因為無線通訊的快速發展，使得行動電話的 基地臺天線的需求大增，且由於基地臺系統的需求，也使 得有關以槽孔耦合為饋入方式的雙線性極化的寬頻微帶天 線倍受重視。 現有以槽孔耦合為其饋入方式的相關設計，以交又的 十字形槽孔，或相互垂直的一字形偏移槽孔為主，這些設 計常以空氣為介質，以獲得寬頻的操作，此時為達到良好 的阻抗匹配，常必須要求耦合槽孔的長度至少為天線輻射 金屬片長度的0.7倍以上，然而在這種情況下會使得天線的 背向輻射（backwardradiation)增大，這也是此類利用槽孔 麵合為饋入方式的最大缺點。 先前所熟知的Η形槽孔在相關耦合槽孔中具有較低 背向輻射的優點，然而從實驗中，我們發現當使用Η形的 耦合槽孔於雙線性極化設計時，兩輸出端訊號的相互耦合 干擾嚴重，造成隔離度（isolation)下降，不適合於實際無 線通訊基地臺的使用。而兩輸入端的槽孔會產生互相麵合 干擾的原因可能是其中一個Η形耦合槽孔的兩臂平行於另 一 Η形槽孔的中間槽孔。在本發明中，我們提出一種改良 Η形耦合槽孔的設計，藉由槽孔形狀的改變，可使兩輸入 端的隔離度很輕易的獲得大幅度改善至少l〇dB以上。490888 A7 B7 Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (1) With the widespread use of wireless communications, the demand for antennas with various characteristics has also increased. Because of the rapid development of wireless communications, mobile phone bases The demand for station antennas has greatly increased, and due to the requirements of the base station system, the bilinearly polarized wideband microstrip antennas with slot-coupling as the feeding method have received much attention. Existing related designs that use slot coupling as their feed-in method are cross criss-cross slots, or vertical offset offset slots. These designs often use air as the medium to obtain wide-band operation. At this time, in order to achieve good impedance matching, the length of the coupling slot must be at least 0.7 times the length of the antenna radiating metal sheet. However, in this case, the backward radiation of the antenna will increase, which is also The biggest disadvantage of this type of use of slotted surfaces as a feed method. The well-known Η-shaped slot has the advantage of lower back radiation in the related coupling slot. However, from experiments, we found that when using a Η-shaped coupling slot in a bilinear polarization design, the two output terminals The mutual coupling and interference of signals are serious, resulting in a decrease in isolation, which is not suitable for the use of an actual wireless communication base station. The reason that the slots at the two input ends will cause mutual interference may be that the arms of one Η-shaped coupling slot are parallel to the middle slot of the other Η-shaped slot. In the present invention, we propose an improved 改良 -shaped coupling slot design. By changing the slot shape, the isolation between the two input terminals can be easily improved by at least 10 dB.
I 意 事 填 訂 本紙張尺度適用中國國家標準（CNS) A4規格（210x297公釐） 490888 A7 B7 經濟部中央標準局員工消費合作社印製 五、發明說明（2) 本务明之天線結構參閱圖式中的第1圖所示。本發明所 述之改良Η形耦合槽孔結構為一創新的設計，同時有別於 昔知的相關設計結構。本項發明的特徵是把一般傳統使用 的Η形耦合槽孔靠近天線中心的兩臂向内彎一定角度，此 種槽孔結構可以降低兩個耦合槽孔間的相互耦合干擾。第2 圖至第4圖為本發明所述天線的實作量測結果。第2圖為反 射損失（returnloss)結果，第3圖為兩輸入端隔離度量測結 果。由結細示，本發明之天線可以制在其大於9%的阻 抗頻寬内，兩輸入端隔離度小於_314dB，同時比起使用一 般傳統Η形耦合槽孔者，改善至少1〇dB以上。另外，第* 圖為本發明之天_輻射場型量測結果，本項天線可以得 到不錯的垂向輻射，同時於天線的中心頻率處（18= MHz)，天線的增益值可達到69dBi。 綜合上述的朗，本發_結_單，僅需將-般傳 統Η形輕合槽孔靠近天線中心的兩臂向内彎—^角度，艮 可輕易的達到良好的隔離度，以及良好的天線增益 特性。因此，本翻之天職具有S度產業朗價值，足 以符合發明之範疇。 、 疋 請I Note that the paper size is applicable to the Chinese National Standard (CNS) A4 size (210x297 mm) 490888 A7 B7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (2) Refer to the diagram for the antenna structure This is shown in Figure 1. The improved Η-shaped coupling slot structure described in the present invention is an innovative design and is different from related design structures known in the past. The feature of this invention is to bend the two arms of the Η-shaped coupling slot that is generally used near the center of the antenna inward at a certain angle. This slot structure can reduce the mutual coupling interference between the two coupling slots. Figures 2 to 4 show the actual measurement results of the antenna according to the present invention. Figure 2 shows the results of the return loss, and Figure 3 shows the measurement results of the two input isolation measurements. As shown in detail, the antenna of the present invention can be made within its impedance bandwidth greater than 9%, and the isolation between the two input terminals is less than _314dB. At the same time, it is improved by at least 10dB compared with the use of the conventional traditional Η-shaped coupling slot . In addition, the figure * shows the measurement results of the sky radiation pattern of the present invention. This antenna can get good vertical radiation, and at the center frequency of the antenna (18 = MHz), the antenna gain value can reach 69dBi. Based on the above-mentioned Lang, the hair _ knot _ single, just need to bend the two arms of the traditional Η-shaped light-fitting slot close to the center of the antenna inward ^ angle, can easily achieve good isolation, and good Antenna gain characteristics. Therefore, the vocation of the book has the value of S degree industry, which is enough to meet the scope of invention. , 疋 please
I 意 事 填 寫 本 頁 訂 本紙張尺度適用中國國豕標準（CNS) Α4規格（210x297公爱） 490888 A7 B7 五、發明說明（3) [圖式說明] 第1圖為本發明之一種具改良Η形槽孔耦合的雙線性極化 寬頻平板天線之結構圖。 第2圖為本發明天線實際製作之反射損失的量測結果。其 中，粗線與細線分別為本發明天線與一般傳統Η形耦合 槽孔者的測量結果。 第3圖為本發明天線之隔離度測量結果。其中，粗線與細線 分別為本發明天線與一般傳統Η形耦合槽孔者的測量結 果0 第4圖為本發明天線於1800 MHz輻射場型量測結果。粗線 及細線分別代表主極化及交叉極化，（1)及(2)分別為x-z 及y-z平面測量結果。 請I Intention to fill in this page The size of the paper is applicable to the Chinese National Standard (CNS) A4 size (210x297 public love) 490888 A7 B7 V. Description of the invention (3) [Illustration of the diagram] The first figure is an improvement of the present invention Structural diagram of a 线性 -shaped slot-coupled bilinearly polarized broadband flat panel antenna. Fig. 2 is a measurement result of reflection loss of an antenna actually manufactured according to the present invention. Among them, the thick line and the thin line are respectively the measurement results of the antenna of the present invention and the conventional traditional Η-shaped coupling slot. FIG. 3 is a result of measuring the isolation of the antenna of the present invention. Among them, the thick line and the thin line are the measurement results of the antenna of the present invention and the conventional traditional Η-shaped coupling slot, respectively. Figure 4 shows the measurement results of the antenna of the present invention at 1800 MHz radiation field. The thick and thin lines represent the main polarization and cross polarization, respectively. (1) and (2) are the x-z and y-z plane measurements, respectively. please
I 意 事 項 再 填 寫 本 頁 經濟部中央標準局員工消費合作社印製 適 度 一尺 張 紙 格 I規 A4Please re-fill this page with the items of interest printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs.
釐 1公 97 2 OX 、發明說明（4) [元件符號說明] (a) (b) (c) 經濟部中央標準局員工消費合作社印製 天線整體結構的侧視圖 接地金屬面上耦合槽孔的結構 基底下方微帶饋線的結構圖 1 :天線輻射金屬片 2 ·基底 3:接地金屬面 =_ _改良h形輕合槽孔 •罪近天線中心的改良H形槽孔之兩臂 42 :遠離天線中心的改良槽孔之 43 ··改良Η形槽孔的中間槽孔 44 :靠近天線中心改良Η形槽孔之兩臂與 5:微帶饋線所在之平面 ^ 片於接地面上 7 · 50歐姆微帶饋線 8 :微帶饋線的微調金屬片細㈣_ 請 先 閱 讀 背 意 事 項 再 填 寫 本 頁 兩臂 X轴的夾角 訂 本紙張尺錢㈣目1 cm 97 2 OX, description of the invention (4) [Explanation of component symbols] (a) (b) (c) Side view of the overall structure of the antenna printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs of the coupling slot on the ground metal surface Structure of the microstrip feeder below the base of the structure Figure 1: Antenna radiating metal sheet2. Base 3: Ground metal surface = _ Improved H-shaped light closing slot • The two arms of the modified H-shaped slot near the center of the antenna 42: Keep away 43 of the improved slot in the center of the antenna ·· Middle slot of the improved slot in the center of the slot 44: Two arms near the slot of the slot in the center of the antenna and 5: The plane where the microstrip feeder is located ^ The piece is on the ground plane 7 · 50 Ohm Microstrip Feeder 8: Fine adjustment of metal strips for microstrip feeders. _ Please read the notes before filling in the X-axis angle of the two arms of this page.