M241815 捌、新型說明： L新i所屬之技術領域】 本創作係為-錢單極天線，幻旨_種具_ 的體積’適合目前小型化或薄形化通訊 ： 極天線。 w又頸耳 【先前技術】 短小的設計，&其内部相 才能達到此一目的。而通 即為天線。因為部份通訊 不同通訊系統，則依其規 而天線品質亦是決定信號 由於目前通訊產品趨向輕薄 關電路及元件需相對縮小體積， 訊裝置其中一個最重要的元件， 產品配合不同通訊協定或是配合 範需要的天線態樣即有所不同， 收發的主要的關鍵。 而為滿足行動通訊裝置的無線接收品質，對於行動天 線的設計要求更為嚴格。以目前應用於手機/手提電腦/ 個人數位助理等具備有無線通訊的輕薄短小行動電子產品 來說，其配備通訊裝置係使用一種改良型的平面式套管偶 極天線（planar sleeve dipole antenna )，請參閱第八 圖所示，其包含有： 一基板（60)，具兩上、下表面，其上形成有穿孔 (601)； 一偶極元件（6 2 )，係為二分之一波長，其形成於 該基板（6 0 )的上表面，其自由端為一漸縮部； 一信號饋入導線（6 3 )，其形成於該基板（6 0 ) 的上表面’其一端與該偶極元件（6 2 )的漸縮部自由端 M241815 連接，而另-端則供-同軸緵線（7 0)信號饋 1 )連接； 、『 —接地導電片（6 4 ) ’係形成於該基板（6 〇 下表面’並對應於該穿孔（6 〇 1 )位置， (70)的遮蔽金屬層（72)連接；m轴境線 四分Γ路導電片（65) ’各開路導電片（65)係為 刀 波長，且分別連接於該接地導電片（6 4 ) J而’以與偶極元件（6 2 )構成完整的偶極天線；、另 、上述平面天線雖可將部份線路形成於基板（6 〇 )上 ==騎式天線，但與同軸⑽（7Q)連接部份 广構卻更形複雜’亦即，接地導電片（64)與信號 只入傳輸線（6 3 )需一同連接至同軸欖線（7㈧上，儿 導電片（64)與信號饋入傳輸線（63)係分 二成上、下表面，故基板（6〇)需額外形成穿孔（6 ’使下表面的接地導電片（6 4 )透過穿孔（6 〇 接至基板（6〇)的上表面後，再行與同轴I線 ^ 連接，至此完成平面式天線的製作。由是可知， ::天線的設計雖可應用於行動性的電子裝置，然而其仍 有下述缺點： ^ 1、’製程繁複耗時：由於基板上線與境線的連接仍以 LI作Ϊ接’故基板除製作線路製程外’亦得進行穿孔電 〜製作成本較高：由於境線與基板連接係涉及基板 牙孔〃琶連接程序，故使得整體製作成本增加。 M241815 僅適用單頻操作：由於半波長偶極元件與信號連 接線係為漸縮式的連接，故而無法任意調整第二頻帶，並 且無法取得較佳之第二頻帶阻抗匹配，因此較常作為單頻 天線使用。 4 ·水平極化信接收較弱，易邊成通訊死角： 4配合參閱第九圖所示，係為該偶極天線的垂直極化 輻化輻射及水平極化輻射場型圖。配合第八圖可清楚瞭解 ，其輻射元的輻射電流之水平方向電流（Ih )因形成對稱 、…構’故而相互抵消造成極化純度太高，由於垂直方向電 机（I v)並沒有抵消，而令垂直極化量遠大於水平極化量 ’因此’水平極化信號接收較弱易造成通訊死角。 5 ·尺寸過大： 由於偶極天線需要約二分之一波長長度，故相較只需 四分之一波長長度的單極天線，其尺寸過大。因此，該偶 極天線則將無法滿足有較多安裝空間限制之通訊設備的需 求。 有鑑於此，此種應用於具有行動通訊的電子裝置用的 天線應加以改良，以具備穩定雙頻收發、小尺寸及接收強 度佳等各功效，以符合目前要求輕薄短小的電子產品上。 【新型内容】 本創作主要目的在提供一種雙頻單極天線，其具有雙 頻接收、薄小尺寸及接收強度佳等多樣化功效，因此，適 合提供只有小安裝空間且要求雙頻通訊的行動通訊裝置使 M241815 名人達上述目的所使用之主要技输手段，係令該雙頻單 極天線包含有： 一基板，係定義有一垂直方向及一水平方向； 一雙頻共振天線單元，係由一低頻輻射元及一高頻輻 射元組成，兩輻射元係·分別形成在基板上並平行基板的垂 直方向，又該低頻輻射元較高頻輻射元長度為長； 一金屬線，係呈一 L形，長邊形成於基板上，並平行 於水平方向，以與雙頻共振天線單元中高、低頻輻射元各 一端連接並供同軸纜線的信號饋入線連接，而短邊則形成 於基板的垂直方向； 一接地金屬線，係形成於基板上並平行其水平方向， 以與金屬線的短端連接，供同軸I線的蔽遮金屬層連接； 上述雙頻單極天線的金屬線係連接至信號饋入線，並 且採不對稱連接’因此，水平輻射電流不會完全抵消，故 本創作可產生輻射電波的水平極化分量，因此，本創作可 同時收發水平及垂直極化分量，令收發信號的強度提升。 又，基板上線路尺寸的長'寬皆可被設計為小於或等 於四刀之波長，故其尺寸相對較為輕薄，而適合使用於 有安裝空間限制的通訊裳置中。 再者，本創作係、提供一種可調阻抗^的雙頻天線， 由於雙頻共振天線單元透過金屬線連接至接地金屬線，且 該接地金屬線與蔽遮金屬層連接，故可藉由調整與同轴纔 線的連接位置，而達到不同阻抗匹配的需求。 【實施方式】 M241815 ^本創作係為一雙頻單極天線，首先請參閱第一圖所示 係為本創作雙頻單極天線的一較佳實施例，其包含有： 基板（11)，係定義有一垂直方向（v)及一水 平方向（Η ); 雙頻共振天線單元，係由一低頻輕射元（1 2 )及 ν頻輻射元（13)組成，兩輻射元（12) (13) 係刀別形成在基板（1丄）上，並平行基板（丄i )的垂 向（V )上，又該低頻輻射元（1 2 )較高頻輻射元 (1 3 )長度為長；於本實施例中，該低頻輕射元（1 2 )係為一連續彎折的金屬線路，而該高頻輻射元（1 3 ) 為一 L形金屬線路，該低頻輻射元（丄2 )的連線彎折金 屬線路係由數個垂直段及水平段連接而成； 一金屬線（1 4 )，係呈一 L形並形成於基板（1 1 )上’其長邊（141)平行於基板（li)的水平方向 (Η ) ’以與雙頻共振天線單元中高、低頻輻射元（1 3 )(1 2 )各一端連接並供同軸纜線（2 〇 )的信號饋入 線（2 1 )連接，而其短邊（1 4 2 )則平行於基板（1 1)的垂直方向（V)上； 一接地金屬線（；L 5 )，係形成於基板（1 1 )上， 並平行於基板（1 1 )的水平方向（Η )，以與金屬線（ 1 4 )的短端連接，係供同軸纜線（2 〇 )的蔽遮金屬層 (2 2 )連接。 上述天線（1 〇 )的組成線路的總長度、寬度可設計 小於或4於四分之一波長，而為一種單極天線，故尺寸相 7 M241815 較偶極天線的二分之一波長為小。 由於高頻輻射元（1 3 )及低頻輻射元（丄2 )的金 屬線路長度不相等，其中長度較長的低頻輻射元（丄2 ) 係操作於較低的頻帶，而高頻輻射元（i 3 )的金屬線路 長度相較低頻輻射元（1 2 )為短，故操作於較高頻帶， 亦即，此兩高、低頻輻射元（13) (12)分別接收高 、低雙頻的信號，又，兩高、低頻輻射元（丄3 ) (12 )的垂直段係平行於基板（11)垂直方向（V)，故分 別接收高、低頻信號的垂直極化分量，形成有輻射垂直電 流（Iv )，請配合參閱第七圖所示，係為本創作雙頻單極 天線（1 0 )的電壓駐波比（VSWR)曲線圖，由圖式中可 知，本創作確實可分別操作於約為2GHz、6GHz的雙頻率。 至於水平極化分量，由於同軸纜線（2 〇 )的金屬遮 蔽層（2 2 )(地線）及信號饋入線（2丄）（火線）分 別連接位於基板（1 1 )水平方向（H )上的金屬線（工 4)及接地金屬線（15)，而且採用不對稱方式連接， 故金屬線（1 4 )及接地金屬線（丄5 )產生的轄射水平 電流（Ih)不會相互抵消，因此，本創作的天線具有接收 信號水平極化分量的功能。 由是可知，本創作的雙頻單極天線可得到水平極化分 里。又，連接位置可視咼、低頻輻射元而調整，以達需要 的阻抗匹配。 请芩閱第二圖所示，係為本創作第二較佳實施例，其 大多結構與第一較佳實施例相同，惟，高頻輻射元（丄3 M241815 )係由一連線彎折的金屬線路構成 射元f 1一其長度亦較低頻輻 (1 2 )為短。故高頻輻射元（ 高頻帶。 、丄3 )仍可刼作於較 請再參閱第三圖所示，係為本創 豆大夕从w ~ ㈤作第二較佳實施例， ，、大夕結構與第二較佳實施例相同 ?、分> , 1隹，低頻輻射兀（1 。但帶的改變’而形成不同長度的'彎曲金屬線路 :士 70 ( 1 2 )同樣較高頻輻射元（1 3 )為長 而可刼作於較低頻帶。 =閱第四圖所示，係為本創作第四較佳實施例，其 (「;構與第三圖相同’惟，金屬線路與高、低頻輻射元 (1 2 )連接的一端形成—彎曲線路（丄4 3 ) ，但其長邊仍是形成於基板（！丄）的水平方向。 ^參閱第五圖所示，係為本創作第五較佳實施例，由 n w線（1 4 )與接地金屬線（1 5 )與同軸i線（2 )連接的位置可調整’以調整匹配阻抗，故於本實施例 ☆尸^屬線（1 4 )係形成一反向L形，以改變與接地 =15)的連接位置。如此’同樣保持以非對稱方 式連接同軸纜線（2 〇 )。 /前述可知，雙頻單極天線（10)的金屬線（14 )亦連“至化號饋入線（2工），並且採不對稱連接，因 、&平H電流不會完全抵消，故本創作可產生輕射電 波的水平極化分量’因此’本創作可同時收發水平及垂直 極化分量。 經量測發現，如第六圖A、3所示垂直極化輕射場型 2权平極化輻射場型，垂直極化分量與水平極化分量的相 又妾、·不會造成通訊死角，而有效提升收發信號強度； 本創作天線的線路的總長度、寬度係設計於小於或等 於四分之_、、*且 ,, σ 渡長’故為一單極天線，相對地其尺寸可較偶 °复為小，適合應用於更輕薄短小的通訊裝置中。 此本創作係符合產業利用性、新穎性及進步性等 要件，爰依法具文提出申請。 【圖式簡單說明】 (一）圖式部分 第 第 第 圖 圖 圖 係本創作第一較佳實施例的平面圖。 係本創作第二較佳實施例平面圖。 第四圖 第五圖 係本創作第三較佳實施例平面圖。 係本創作第四較佳實施例平面圖。 ^ 係本創作第五較佳實施例平面圖。 第六圖A、Β :传太扁丨备n 错 · ，、本創作的垂直及水平輻射場型圖 七圖··係本創作的_電塵駐波比波形圖。 ^圖係省用單頻偶極天線的平面圖。 弟九圖··係第八圖的 一 ΰ的垂直及水平輻射場型圖。 (1 1 )基板 (1 3 )高頻輻射元 (1 4 1 )長邊 (1 4 3 )彎曲線路 (2 0 )同軸纜線 (二）元件代表符號 (1〇)雙頻單極天線 (1 2 )低頻輻射元 (14)金屬線 (1 4 2 )短邊 (1 5 )接地金屬線 M241815 (2 1 )信號饋入線 (6 0 )天線 (6 2 )偶極元件 (6 4 )接地導電片 (7 0 )同軸纜線 (7 2 )遮蔽金屬層 (2 2 )遮蔽金屬層 (6 1 )基板 (6 3 )信號饋入傳輸線 (6 5 )開路導電片 (7 1 )信號饋入線M241815 新型, new type description: The technical field of L Xini] This creation is a -money monopole antenna, the purpose of the _species_ volume is suitable for the current miniaturization or thin communication: pole antenna. w and neck ears [Previous technology] Short design, & internal phase can achieve this purpose. And it is the antenna. Because some communication systems are different, the quality of the antenna is also determined by the specifications. Because the current communication products tend to be thin and light, the circuits and components need to be relatively small. One of the most important components of the communication device, the product cooperates with different communication protocols or The antenna pattern required by the fan is different, and the main key for receiving and transmitting. In order to meet the wireless reception quality of mobile communication devices, the design requirements for mobile antennas are more stringent. For light and thin mobile electronic products with wireless communication currently applied to mobile phones / laptops / personal digital assistants, the communication devices are equipped with an improved planar sleeve dipole antenna. Please refer to the eighth figure, which includes: a substrate (60) with two upper and lower surfaces with perforations (601) formed on it; a dipole element (6 2), which is a half wavelength It is formed on the upper surface of the substrate (60), and its free end is a tapered portion; a signal feeding wire (63) is formed on the upper surface of the substrate (60), and one end thereof is connected with the The free end M241815 of the tapered part of the dipole element (6 2) is connected, and the other end is connected to the coaxial coaxial line (70) signal feed 1); "--the ground conductive piece (6 4)" is formed at The substrate (the lower surface of 60) corresponds to the position of the perforation (601), and the shielding metal layer (72) of (70) is connected; the m-axis horizon line divides the Γ road conductive sheet (65), and each open circuit conductive sheet ( 65) is a knife wavelength, and is respectively connected to the grounded conductive sheet (6 4) J and 'and a dipole The component (6 2) constitutes a complete dipole antenna; In addition, although the above-mentioned planar antenna can form part of the circuit on the substrate (60) == riding antenna, it is connected to the coaxial ⑽ (7Q) to form a wide structure. However, it is more complicated. That is, the grounding conductive piece (64) and the signal-only transmission line (63) need to be connected to the coaxial cable (7㈧), and the conductive piece (64) and the signal-feeding transmission line (63) are separated. 20% of the upper and lower surfaces, so the substrate (60) needs to form additional perforations (6 'to make the ground conductive sheet (64) on the lower surface through the perforations (60) connected to the upper surface of the substrate (60), and then go It is connected to the coaxial I line ^, so that the production of the planar antenna is completed. It can be seen that although the design of :: antenna can be applied to mobile electronic devices, it still has the following disadvantages: ^ 1. 'The process is complicated and complicated Time: Because the connection between the substrate line and the boundary line is still connected by LI, so the substrate must be perforated in addition to the circuit manufacturing process ~ The production cost is higher: Because the connection between the boundary line and the substrate involves the substrate tooth hole 〃pa connection procedure, Therefore, the overall production cost is increased. Operation: Since the half-wavelength dipole element is connected to the signal connection line in a tapered manner, the second frequency band cannot be arbitrarily adjusted, and a better impedance matching of the second frequency band cannot be achieved, so it is more commonly used as a single frequency antenna. The horizontally polarized signal reception is weak, and it is easy to become a dead angle for communication: 4 See Figure 9 for cooperation, which is the vertical polarized radiation and horizontally polarized radiation pattern of the dipole antenna. It is clearly understood that the horizontal current (Ih) of the radiant current of its radiating element cancels each other due to the formation of symmetry, structure, and the polarization purity is too high. Because the vertical direction motor (Iv) does not cancel, the vertical pole The amount of polarization is much larger than the amount of horizontal polarization 'so' weak reception of horizontally polarized signals is likely to cause communication dead angles. 5 · Oversize: Since a dipole antenna requires about one-half the wavelength length, it is too large compared to a monopole antenna that only requires a quarter-wavelength length. Therefore, the dipole antenna will not be able to meet the needs of communication equipment with more installation space restrictions. In view of this, such antennas used in electronic devices with mobile communication should be improved to have various functions such as stable dual-frequency transmission and reception, small size, and good reception strength, in order to meet the current requirements for thin, short and small electronic products. [New content] The main purpose of this creation is to provide a dual-frequency monopole antenna, which has a variety of functions such as dual-frequency reception, small size and good reception strength. Therefore, it is suitable for providing actions with small installation space and requiring dual-frequency communication. The main technical means used by the communication device to enable M241815 celebrities to achieve the above purpose is that the dual-frequency monopole antenna includes: a substrate, which defines a vertical direction and a horizontal direction; a dual-frequency resonant antenna unit, which is composed of a It consists of a low-frequency radiator and a high-frequency radiator. Two radiant elements are respectively formed on the substrate and parallel to the vertical direction of the substrate. The length of the high-frequency radiator is longer; a metal wire is a L The long side is formed on the substrate and is parallel to the horizontal direction. It is connected to each end of the high-frequency and low-frequency radiating elements of the dual-frequency resonant antenna unit and connected to the signal feed line of the coaxial cable. Direction; a grounded metal wire is formed on the substrate and parallel to its horizontal direction to connect with the short end of the metal wire for shielding the coaxial I line Layer connection; the metal line of the above dual-frequency monopole antenna is connected to the signal feed line, and it is connected asymmetrically. This creation can send and receive horizontal and vertical polarization components at the same time, so that the strength of the sent and received signals is improved. In addition, the length and width of the circuit size on the substrate can be designed to be less than or equal to the wavelength of four blades, so its size is relatively thin and thin, and it is suitable for use in communication dresses with limited installation space. Furthermore, this creative department provides a dual-frequency antenna with adjustable impedance ^. Since the dual-frequency resonant antenna unit is connected to the ground metal wire through a metal wire, and the ground metal wire is connected to the shielding metal layer, it can be adjusted by The connection position with the coaxial cable, to meet the needs of different impedance matching. [Embodiment] M241815 ^ This creative system is a dual-frequency monopole antenna. First, please refer to the first figure to show a preferred embodiment of this creative dual-frequency monopole antenna, which includes: the substrate (11), The system defines a vertical direction (v) and a horizontal direction (Η); a dual-frequency resonance antenna unit, which is composed of a low-frequency light emitting element (1 2) and a ν-frequency radiating element (13), and two radiating elements (12) ( 13) The knives are formed on the substrate (1 丄) and parallel to the vertical direction (V) of the substrate (丄 i), and the length of the low-frequency radiator (1 2) and the higher-frequency radiator (1 3) are long. In this embodiment, the low-frequency light emitting element (1 2) is a continuously bent metal line, and the high-frequency radiating element (1 3) is an L-shaped metal line, and the low-frequency radiating element (丄 2 ) The connected bent metal circuit is formed by connecting several vertical and horizontal sections; a metal wire (1 4) is L-shaped and is formed on the substrate (1 1) 'its long side (141) Parallel to the horizontal direction (Η) of the substrate (li) 'to connect to each end of the high-frequency and low-frequency radiating elements (1 3) (1 2) of the dual-frequency resonant antenna unit and provide a coaxial cable (2 〇) is connected to the signal feed line (2 1), and its short side (1 4 2) is parallel to the vertical direction (V) of the substrate (1 1); a ground metal line (; L 5) is formed at The substrate (1 1) is parallel to the horizontal direction (Η) of the substrate (1 1), and is connected to the short end of the metal wire (1 4), and is a shielding metal layer for the coaxial cable (20). 2 2) Connect. The total length and width of the component lines of the above antenna (10) can be designed to be less than or 4 to a quarter wavelength, and it is a monopole antenna, so the size phase 7 M241815 is smaller than the half wavelength of the dipole antenna. . Because the lengths of the metal lines of the high-frequency radiating element (1 3) and the low-frequency radiating element (丄 2) are not equal, the long-frequency low-frequency radiating element (丄 2) operates in a lower frequency band, while the high-frequency radiating element (（2) i 3) The length of the metal line is shorter than the lower frequency radiating element (1 2), so it operates in a higher frequency band, that is, the two high and low frequency radiating elements (13) (12) receive high and low dual frequency respectively In addition, the vertical segments of the two high and low frequency radiating elements (丄 3) (12) are parallel to the vertical direction (V) of the substrate (11), so the vertical polarization components of the high and low frequency signals are received respectively, and radiation is formed. The vertical current (Iv), please refer to the seventh figure, which is the voltage standing wave ratio (VSWR) curve of the dual-frequency monopole antenna (1 0) for this creation. As can be seen from the figure, this creation can be distinguished separately. Operates at dual frequencies of approximately 2GHz and 6GHz. As for the horizontal polarization component, the metal shielding layer (2 2) (ground wire) and the signal feed line (2 及) (hot wire) of the coaxial cable (20) are respectively connected to the horizontal direction (H) of the substrate (1 1). The metal wire (work 4) and the ground metal wire (15) are connected in an asymmetric manner, so the radiation horizontal current (Ih) generated by the metal wire (1 4) and the ground metal wire (丄 5) will not mutually Cancellation, therefore, the antenna of this creation has the function of receiving the horizontal polarization component of the signal. It can be seen that the dual-frequency monopole antenna of this creation can obtain horizontal polarization centimeters. In addition, the connection position can be adjusted based on chirp and low-frequency radiating elements to achieve the required impedance matching. Please refer to the second figure, which is the second preferred embodiment of this creation. Most of the structures are the same as the first preferred embodiment. However, the high-frequency radiator (丄 3 M241815) is bent by a connection. The metal line constitutes the radio unit f 1-its length is also low and the frequency spoke (1 2) is short. Therefore, the high-frequency radiating element (high frequency band, 丄 3) can still be used as shown in the third figure, which is the second preferred embodiment of this invention from w ~ ，. The structure is the same as that of the second preferred embodiment. 1), 1 隹, low-frequency radiation (1. But the change of the band 'to form' curved metal lines of different lengths: ± 70 (1 2) also higher frequency The radiating element (1 3) is long and can be used in lower frequency bands. = As shown in the fourth figure, it is the fourth preferred embodiment of this creation. Its structure is the same as that in the third figure. However, the metal The line is connected to the high-frequency and low-frequency radiating elements (1 2) at one end—a curved line (丄 4 3), but its long side is still formed in the horizontal direction of the substrate (! 丄). ^ Refer to the fifth figure. For the fifth preferred embodiment of this creation, the position where the nw wire (1 4), the ground metal wire (1 5), and the coaxial i wire (2) are connected can be adjusted to adjust the matching impedance, so in this embodiment ^ The subordinate wire (1 4) forms an inverted L-shape to change the connection position with the ground = 15). In this way, the coaxial cable (2 ). / As can be seen from the foregoing, the metal wire (14) of the dual-frequency monopole antenna (10) is also connected to the "Zhihua" feed line (2 workers) and is connected asymmetrically, because the & flat H current will not completely cancel out Therefore, this creation can generate the horizontally polarized component of light radio waves. Therefore, this creation can send and receive both horizontal and vertical polarization components. After measurement, it is found that the vertically polarized light field type 2 shown in Figures 6 and 6 of Figure 6 The right-level polarization radiation field type, the phase of the vertical polarization component and the horizontal polarization component are irritating, and will not cause communication dead angles, but effectively improve the strength of the transmit and receive signals; the total length and width of the antenna line of this creative design are designed to be less than Or equal to one-fourth of _ ,, * ,,, σ Watanabe ', so it is a monopole antenna, and its size can be relatively smaller than even °, suitable for lighter, thinner and shorter communication devices. In line with the requirements of industrial availability, novelty, and progress, the application was submitted in accordance with the law. [Simplified illustration of the drawing] (a) The first drawing of the drawing part is the plan view of the first preferred embodiment of this creation. This is the second preferred embodiment of the present invention. The fourth figure and the fifth figure are plan views of the third preferred embodiment of the present invention. The fourth figure of the present invention are plan views. ^ The fifth preferred embodiment of the present invention are plan views. The sixth figures A and B are: Taibian 丨 prepare n wrong ·, this creation of vertical and horizontal radiation field diagrams seven diagrams · is the _ ESD standing wave ratio waveform diagram created by the author. ^ The diagram is a plan view of the provincial single-frequency dipole antenna. Brother The ninth figure is a vertical and horizontal radiation field pattern of the first figure of the eighth figure. (1 1) substrate (1 3) high-frequency radiation element (1 4 1) long side (1 4 3) curved line (2 0 ) Coaxial cable (two) component representative symbols (10) dual-frequency monopole antenna (1 2) low-frequency radiation element (14) metal wire (1 4 2) short side (1 5) ground metal wire M241815 (2 1) Signal feed line (60) Antenna (6 2) Dipole element (6 4) Grounding conductive sheet (70) Coaxial cable (7 2) Shielding metal layer (2 2) Shielding metal layer (6 1) Substrate (6) 3) Signal feed-in transmission line (6 5) Open-circuit conductive sheet (7 1) Signal feed-in line
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