200935662 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種電容耦合式天線，尤指一種具有入 向性的良好輻射效能及較大操作頻寬的電容耦合式天線。 【先前技術】 天線係無線通訊裝置必備的元件，請參考第六圖所 示’ 一般會將天線（40)設置於無線通訊裝置載板（5〇)之角 © S處時’使其具有最佳的收發效果，並且於該天線⑽）周 圍設一淨空區（51)，且在該淨空區内不可放置其他金屬器 件，以避免天線與載板（50)上其他元件形成干擾而影響天 線的收發特性。 然而，現今無線通訊裝置在研發過程中，除了希望尺 寸能輕薄短小之外，更期望能使其具備更多功能，因此不 僅線路叹计的複雜度提升，所使用的元件數量亦比較多， ❹疋以’即使是載板的角落也可能因設計需求，而必須設置 天線以外的元件，如此勢必得改變天線之設置位置，而此 改變可月匕會造成淨空區被迫縮小，導致電磁干擾增加而降 低天線的輻射能力，收發效果因此降低，當電路板上的金 屬益件（如電池、LCD螢幕、1/〇連接器…等）蓋住天線時， 不僅會使传該天線的頻率特性失調，同時，也會對輕射特 性產生干擾，造成天線無法正常操作。 ^由上述可知，如何能讓天線從載板角落移至非載板角 落處且可以抗拒載板上與天線相鄰近金屬器件的干擾， 4 200935662 步改進之方 並能達到良好的頻寬鱼鉉斛 見射效能，仍有待進 案。 【發明内容】 為此，本發明之主要目的在提供—種電容耦合式天 4旅其可位於設有糸統接地面之載板的邊緣非角落處，同 時兼具較大收發頻宽以及高輻射效能。 〇BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitively coupled antenna, and more particularly to a capacitively coupled antenna having good inductivity and large operating bandwidth. [Prior Art] For the components necessary for the wireless communication device of the antenna system, please refer to the figure shown in Figure 6. 'When the antenna (40) is normally placed at the corner of the wireless communication device carrier board (5〇), it has the most Good transmission and reception effect, and a clearing area (51) is arranged around the antenna (10), and no other metal devices can be placed in the clearance area to prevent the antenna from interfering with other components on the carrier board (50) and affecting the antenna. Transceiver characteristics. However, in the development process of today's wireless communication devices, in addition to the desire to be thin and light, it is expected to have more functions, so that not only the complexity of the line sag is increased, but also the number of components used is relatively large, ❹疋 ' 'even if the corner of the carrier board may also be due to design needs, but must set the components outside the antenna, so it is necessary to change the location of the antenna, and this change can cause the clearance area to be forced to shrink, resulting in increased electromagnetic interference When the radiation capability of the antenna is reduced, the transmission and reception effect is reduced. When the metal components on the circuit board (such as a battery, an LCD screen, a 1/〇 connector, etc.) cover the antenna, the frequency characteristics of the antenna are not dysfunctional. At the same time, it will also interfere with the light-emitting characteristics, causing the antenna to operate normally. ^ As can be seen from the above, how can the antenna be moved from the corner of the carrier board to the corner of the non-carrier board and can resist the interference of the metal component adjacent to the antenna on the carrier board. 4 200935662 The improvement of the step can achieve a good bandwidth. Seeing the shooting performance, it is still pending. SUMMARY OF THE INVENTION To this end, the main object of the present invention is to provide a capacitively coupled type of sky-walking bridge that can be located at a non-corner edge of a carrier plate provided with a SiT ground plane, and has a large transmission and reception bandwidth and high Radiation efficacy. 〇
為達成前述目的所採取之主要技術手段係令前述電容 耗合式天線包括： 第一介質基板上，該系統接 容置區； 一系統接地面，係置於一 地面一邊緣非角落處係設有一 -輻射組件’係置於該第一介質基板上而位於容置區 内’該輻射組件包含-電容式饋入匹配部及-共振部，其 中-玄共振部-端與該電容式鎮入匹配部相肖，其延伸之 另一端則與該系統接地面相連接，其長度約為騎操作於 一特定共振頻率之波長的四分之一。 /本發明係、主要將一系統接地面置於一介質基板上，並 令系統接地面一邊緣非角落處係設有一容置區，於該容置 區内λ有電谷式饋入匹配部及一與該電容式饋入匹配部 2對的共振部，並使共振部一端與系統接地面連接；該電 谷式饋入匹配部與該共振部所構成的輻射組件所能達到的 輻射效率因與系統接地面電氣連接的關係而大幅提高，故 本發明可具有較大的操作頻寬，使得本天線設計可以不限 於只設置在介質基板的角落，只要其系統接地面與共振部 200935662 • 的一端連接即可構成大面積而具全向性的收發範圍，且因 系統接地面之屏蔽而具有可以抗拒電路板上與天線相鄰近 金屬器件干擾的能力》 【實施方式】 請參閱第一圖所示’係本發明一較佳實施例，其包含： 一第一介質基板（10); 一系統接地面（20)，係置於該第一介質基板（1〇)上，該 ® 系統接地面（2〇)位於第一介質基板（10)上一邊緣非角落處係 設有一容置區（21); 一輻射組件（30)，係設於該第一介質基板（1〇)上而位於 容置區（21)内，該輻射組件（30)包含一電容式饋入匹配部（31) 及一共振部（32)，其中，該共振部（32)係呈l形狀，其一 端與該電容式饋入匹配部（31)相對間隔，其延伸之另一端 則與該系統接地面（20)相連接，其長度約為預定操作於一 Q 特疋共振頻率波長的四分之一，如以本發明操作於.2.4GHz 共振頻率的藍牙或無線區域網路（WLAN)為例，設計於介 質吊數為4.4的介質基板上所需之共振部（32)長度約為15 宅米（mm)。 凊參考第二圖所示，該輻射組件（3〇)可進一步透過一 §號饋入組件（33)與系統接地面（2〇)連接，該訊號饋入組件 (33)係可為同軸傳輸線、微帶線' 共平面波導或接頭。 、咕參考第二圖所示，係本發明另一較佳實施例，與前 述實施例不同處在於：前述共振部（32)延伸的另一端係經 200935662 • 由一晶片電感（34)連接一從系統接地面延伸出的共振部末 端（32a)，該晶片電感（34)可有效延長電流路徑，可使本實 ㈣的^部⑼所需長度小於前__實施例的共振部（32)所 需長度’以節省天線的設置區域。 本發明藉由將共振部（32)與系統接地面（2〇)連接，增加 天線的收發面積，進而獲得良好的輻射效能。 μ參閱第四圖’係、為本發明又—較佳實施例，與前述 實施例不同處在於該輻射組件(3〇)係以嵌入方式設於該第 © ’丨貝基板上’本實施例中，該系統接地面(20)係於容置 區一側形成有一共振部末端（32a)，再者，如第五圖所示， 該輻射組件（3G)的電容式饋人匹配部（31)及共振部（32)係形 成於一獨立的第二介質基板（35)上，且進一步包含一金屬 片（36)，該金屬片（36)係略呈〔字型且設於該第二介質基板 (35)上並圍繞該電容式饋人匹配部（31)及共振部⑽，且 該金屬片（36)係與該系統接地面（2〇)電氣連接。 本實施例的第一介質基板（1〇)係於容置區（21)處形成缺 口’當該輻射組件（3G)嵌人該缺口_，其金屬片（36)係與系 、”先接地面（2G)f：氣接觸，該共振部（32)之—端賴由前述晶 片電感（34)與該系統接地面（20)之共振部末端（32a)電氣接 觸’因此本實_同樣藉由共振部（32)與线接地面（2〇)連 接使所能達到的輻射效率大幅提高。 從附件一及附件二的返回損失圖中可以知道本發明的 天$叹汁在無相鄰金屬器件以及有相鄰金屬器件的頻率響 應ί月形，不僅其頻率特性可以正常操作，而且也能夠維持 7 200935662 . 既有的輻射能力，因此，可以證明本天線設計可以放置在 載板的邊緣非角落處’且具有可以抗拒電路板上與天線相 鄰近金屬器件干擾的能力。 本發明係主要於一系統接地面所形成的容置區内設有 輻射組件，該輻射組件包含一電容式饋入匹配部及一與 該電容式饋入匹配部相對的共振部，並使共振部一端與系 統接地面連接；該輻射組件可直接形成於該系統接地面所 在之介質基板上或可以嵌入方式設於該介質基板之一側， ® 從而使該電容式饋入匹配部與該共振部所構成的輻射組件 所能達到的輻射效率大幅提高，故本發明可具有較大的操 作頻寬且不限於設置在介質基板的角落，只要其系統接 地面與共振部的一端連接即可構成大面積而具全向性的收 發範圍，且因系統接地面之屏蔽而可提高其抗拒電路板上 與天線相鄰近金屬器件干擾的能力。 综上所述，本發明相較既有單極天線已具備顯著功效 增進’並符合發明專利要件，爰依法提起申請。 【圖式簡單說明】 第一圖：係本發明一較佳實施例之立體圖。 第二圖：係第一圖進一步包含訊號饋入組件之俯視 圖。 第二圖.係本發明另一較佳實施例之俯視圖。 第四圖：係本發明又一較佳實施例之俯視圖。 第五圖：係第四圖之輻射組件的立體圖。 8 200935662 第六圖：係習知天線設於一載板角落之示意圖。 【附件說明】 附件一：係本發明之返回損失圖。 附件二：係本發明返回損失的3D示意圖。 【主要元件符號說明】 (10)第一介質基板 （20)系統接地面 (21)容置區 （30)輻射組件The main technical means for achieving the foregoing objective is that the capacitor-consisting antenna comprises: a first dielectric substrate, the system is connected to the receiving area; and a system grounding surface is disposed on a ground-edge non-corner a radiation component is disposed on the first dielectric substrate and located in the accommodating region. The radiation component includes a capacitive feed matching portion and a resonance portion, wherein the sinusoidal resonance end is matched with the capacitive town The other end of the extension is connected to the ground plane of the system, and its length is about a quarter of the wavelength of the ride at a specific resonant frequency. The invention mainly comprises a system grounding surface disposed on a dielectric substrate, and an accommodating area is disposed at a non-corner edge of the grounding surface of the system, and the electric valley type feeding matching part is λ in the accommodating area. And a resonant portion of the capacitive feed matching portion 2, and connecting one end of the resonant portion to the system ground plane; the radiation efficiency that the electric valley type feeds the matching portion and the radiating element formed by the resonant portion Because the relationship with the system ground plane is greatly improved, the present invention can have a large operating bandwidth, so that the antenna design can be not limited to being disposed only at the corner of the dielectric substrate, as long as the system ground plane and the resonance portion 200935662. One end of the connection can form a large-area and omnidirectional transmission and reception range, and has the ability to resist the interference of the adjacent metal components on the circuit board due to the shielding of the system ground plane. [Embodiment] Please refer to the first figure. A preferred embodiment of the present invention includes: a first dielectric substrate (10); a system ground plane (20) disposed on the first dielectric substrate (1〇), the ® system The grounding surface (2〇) is disposed on a non-corner of the edge of the first dielectric substrate (10), and is disposed on the first dielectric substrate (1). The radiation component (30) is disposed in the accommodating area (21), and includes a capacitive feed matching portion (31) and a resonance portion (32), wherein the resonance portion (32) has an l shape and one end thereof Opposite the capacitive feed matching portion (31), the other end of the extension is connected to the system ground plane (20), and has a length approximately equal to a quarter of a wavelength of a Q-trending resonance frequency. For example, in the case of the Bluetooth or wireless local area network (WLAN) operating at a resonance frequency of 2.4 GHz, the resonance portion (32) required on a dielectric substrate having a media hanging number of 4.4 is about 15 m. (mm). Referring to the second figure, the radiation component (3〇) can be further connected to the system ground plane (2〇) through a § number feed component (33), and the signal feed component (33) can be a coaxial transmission line. , microstrip line 'coplanar waveguide or joint. Referring to the second embodiment, another preferred embodiment of the present invention differs from the previous embodiment in that the other end of the resonant portion (32) extends through 200935662. • is connected by a chip inductor (34). The end of the resonant portion (32a) extending from the system ground plane, the chip inductor (34) can effectively extend the current path, so that the required length of the portion (9) of the present (4) is smaller than the resonant portion of the front __ embodiment (32) The required length 'to save the setting area of the antenna. The invention increases the transmitting and receiving area of the antenna by connecting the resonance portion (32) with the system ground plane (2〇), thereby obtaining good radiation performance. Referring to the fourth figure, which is a further embodiment of the present invention, the difference from the foregoing embodiment is that the radiation component (3〇) is embedded on the first 'mussel substrate' in this embodiment. The grounding surface (20) of the system is formed with a resonance end (32a) on one side of the accommodating area, and further, as shown in FIG. 5, the capacitive matching part of the radiation component (3G) (31) And the resonance portion (32) is formed on a separate second dielectric substrate (35), and further includes a metal piece (36), the metal piece (36) is slightly [shaped and disposed in the second The capacitive feed matching portion (31) and the resonance portion (10) are surrounded by the dielectric substrate (35), and the metal piece (36) is electrically connected to the system ground plane (2〇). The first dielectric substrate (1〇) of the embodiment is formed with a notch at the accommodating area (21). When the radiating element (3G) is embedded in the notch _, the metal piece (36) is connected with the system. Ground (2G) f: gas contact, the end of the resonant portion (32) is electrically contacted by the chip inductor (34) and the resonant end (32a) of the system ground plane (20). The radiation efficiency that can be achieved is greatly improved by the connection of the resonance portion (32) to the line ground plane (2〇). It can be seen from the return loss diagrams of Annexes 1 and 2 that the sigh juice of the present invention is in the absence of adjacent metals. The frequency response of the device and adjacent metal devices not only allows the frequency characteristics to operate normally, but also maintains the existing radiation capability. Therefore, it can be proved that the antenna design can be placed on the edge of the carrier. The corner is 'and has the ability to resist the interference of the metal component adjacent to the antenna on the circuit board. The invention is mainly provided with a radiation component in a accommodating area formed by a system ground plane, the radiation component including a capacitive feed Matching section and one The capacitor is fed into the opposite resonance portion of the matching portion, and one end of the resonance portion is connected to the system ground plane; the radiation component can be directly formed on the dielectric substrate where the ground plane of the system is located or can be embedded in one of the dielectric substrates The side, ® thus greatly increases the radiation efficiency that the capacitive feed matching portion and the radiating element formed by the resonant portion can achieve, so the present invention can have a large operating bandwidth and is not limited to being disposed at a corner of the dielectric substrate. As long as the system ground plane is connected to one end of the resonance part, a large-area omnidirectional transmission and reception range can be formed, and the shielding of the system ground plane can improve the resistance of the circuit board to the interference of the adjacent metal components on the circuit board. In summary, the present invention has a significant improvement in performance compared to existing monopole antennas and meets the requirements of the invention patents, and is filed according to law. [Simplified Schematic] FIG. 1 is a preferred embodiment of the present invention. A perspective view of the second embodiment of the present invention further includes a top view of the signal feed assembly. Figure 4 is a plan view of a further preferred embodiment of the present invention. Figure 5 is a perspective view of the radiation assembly of Figure 4. 8 200935662 Figure 6: Schematic diagram of a conventional antenna disposed at a corner of a carrier [Description of Attachment] Attachment 1: is the return loss diagram of the present invention. Annex 2: 3D schematic diagram of the return loss of the present invention. [Description of main component symbols] (10) First dielectric substrate (20) system ground plane (21) Storing area (30) radiation component
(31)電容式饋入匹配部（32)共振部 (32a)共振部末端 （33)訊號饋入組件 (34)晶片電感 （3 5)第二介質基板 (36)金屬片 （40)天線 (50)載板 （51)淨空區 (60)訊號饋入組件(31) Capacitive feed matching part (32) Resonant part (32a) Resonant end (33) Signal feed component (34) Chip inductance (3 5) Second dielectric substrate (36) Metal piece (40) Antenna ( 50) carrier board (51) clearance area (60) signal feed component