TWI393290B - A dual-band inverted-f antenna - Google Patents
A dual-band inverted-f antenna Download PDFInfo
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- TWI393290B TWI393290B TW98100827A TW98100827A TWI393290B TW I393290 B TWI393290 B TW I393290B TW 98100827 A TW98100827 A TW 98100827A TW 98100827 A TW98100827 A TW 98100827A TW I393290 B TWI393290 B TW I393290B
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- 239000002184 metal Substances 0.000 claims description 50
- 229910052751 metal Inorganic materials 0.000 claims description 50
- 239000000758 substrate Substances 0.000 claims description 23
- 238000010295 mobile communication Methods 0.000 claims description 8
- 238000005530 etching Methods 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 6
- 230000009977 dual effect Effects 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Description
本發明係關於一種倒F形天線，特別是一種可雙頻操作之倒F形天線，適合應用於行動通訊產品上。The present invention relates to an inverted-F antenna, and more particularly to an inverted-F antenna capable of dual-frequency operation, which is suitable for use in a mobile communication product.
近年來，隨著無線通訊技術的發展與進步，使得各式各樣的無線通訊技術與產品不斷的進步與出現，其中筆記型電腦結合無線區域網路(WLAN,Wireless Local Area Network)即是相當普遍的應用，其需求更是與日俱增。而傳統筆記型電腦天線欲達成WLAN操作常利用雙路徑的方式，如台灣專利公告號第I293215號“一種雙頻倒F形天線”，其揭示一種利用雙路徑的方式來達成WLAN操作之天線即為一例，但其天線體積較大，因此本發明提出一種適用於行動通訊裝置之雙頻倒F形天線設計，其操作頻帶範圍可滿足2.4/5.2/5.8 GHz WLAN(2400~2484/5150~5350/5725~5825 MHz)操作，且天線結構簡單，尺寸僅約9×10 mm2 ，可印刷或蝕刻於支撐介質基板上，製作成本低廉，故本發明天線相當符合現今行動通訊裝置的需求。In recent years, with the development and advancement of wireless communication technology, various wireless communication technologies and products have been continuously improved, and the notebook computer combined with the wireless local area network (WLAN) is quite equivalent. With universal applications, the demand is increasing. Traditional notebook computer antennas often use a dual path method for WLAN operation, such as Taiwan Patent Publication No. I293215 "a dual-frequency inverted-F antenna", which discloses an antenna that utilizes a dual path to achieve WLAN operation. For example, but the antenna is large in size, the present invention proposes a dual-frequency inverted-F antenna design suitable for a mobile communication device, and the operating frequency band can satisfy 2.4/5.2/5.8 GHz WLAN (2400~2484/5150~5350). /5725~5825 MHz) operation, and the antenna structure is simple, the size is only about 9×10 mm 2 , and can be printed or etched on the supporting medium substrate, and the manufacturing cost is low, so the antenna of the invention is quite suitable for the requirements of the current mobile communication device.
本發明之目的在於提出一種雙頻倒F形天線設計，其尺寸小並可涵蓋2.4/5.2/5.8 GHz WLAN之操作。It is an object of the present invention to provide a dual frequency inverted-F antenna design that is small in size and can cover the operation of a 2.4/5.2/5.8 GHz WLAN.
本天線發明包含：一接地面、一支撐介質基板、一輻 射金屬部及一饋入金屬部。該支撐介質基板之一側邊鄰近該接地面之一側邊；該輻射金屬部呈一開口朝向該接地面的U形，並係以蝕刻或印刷技術形成於該支撐介質基板之一表面上，其一端為開口端，另一端則電氣連接至該接地面之短路點，該輻射金屬部之長度少於該天線第一(最低)操作頻帶中心頻率之四分之一波長且具有至少一次以上之彎折；該饋入金屬部係以蝕刻或印刷技術形成於該支撐介質基板與該輻射金屬部相對應之另一表面上，其一端為天線饋入端，連接至一信號源，另一自由端部則與該輻射金屬部重疊。The antenna invention comprises: a ground plane, a supporting dielectric substrate, and a spoke The metal part and one metal part are fed. One side of the supporting dielectric substrate is adjacent to one side of the grounding surface; the radiating metal portion has a U shape with an opening facing the grounding surface, and is formed on one surface of the supporting dielectric substrate by etching or printing technology. One end is an open end, and the other end is electrically connected to a short-circuit point of the ground plane, the length of the radiating metal portion is less than a quarter of a wavelength of a center frequency of the first (lowest) operating band of the antenna and has at least one time Bending; the feeding metal portion is formed on the other surface of the supporting dielectric substrate corresponding to the radiating metal portion by etching or printing technology, one end of which is an antenna feeding end, connected to a signal source, and the other is free The end portion overlaps the radiant metal portion.
本項發明天線主要以耦合饋入方式，比起傳統直接饋入方式，輻射金屬部上之電流分佈較為均勻，進而減緩天線第一(最低)共振模態的實部阻抗值，再藉由調整饋入金屬部與輻射金屬部之重疊面積來有效增加電容性，以補償原本過高之電感性，使得天線兩個操作頻帶均達成良好的阻抗匹配，進而能夠滿足2.4/5.2/5.8 GHz WLAN之多頻操作。此外，由於本項發明天線係以蝕刻或印刷方式形成於一支撐介質基板上，有助於天線共振模態降頻，因此該輻射金屬部之長度會少於該天線第一(最低)操作頻帶中心頻率之四分之一波長。同時，該輻射金屬部經至少一次以上之彎折，達到尺寸縮小化的目的，面積僅約9×10 mm2 ，適合置放於一筆記型電腦內部或一行動通訊裝置內部，為 一內藏式天線應用。The antenna of the invention mainly adopts a coupling feeding mode, and the current distribution on the radiating metal portion is relatively uniform compared with the conventional direct feeding mode, thereby mitigating the real impedance value of the first (lowest) resonant mode of the antenna, and then adjusting Feeding the overlapping area of the metal part and the radiating metal part to effectively increase the capacitance to compensate for the excessively high inductance, so that the two operating bands of the antenna achieve good impedance matching, thereby satisfying the 2.4/5.2/5.8 GHz WLAN. Multi-frequency operation. In addition, since the antenna of the present invention is formed on a supporting dielectric substrate by etching or printing, which contributes to the antenna resonant mode down-conversion, the length of the radiating metal portion is less than the first (lowest) operating band of the antenna. One quarter wavelength of the center frequency. At the same time, the radiant metal portion is bent at least once to achieve the purpose of downsizing, and the area is only about 9×10 mm 2 , which is suitable for being placed inside a notebook computer or inside a mobile communication device. Antenna application.
第1圖為本發明天線一實施例1結構圖，包含：一接地面11、一支撐介質基板12、一輻射金屬部13及一饋入金屬部14。該接地面11為一筆記型電腦液晶螢幕之支撐金屬背板或為一行動通訊裝置之系統接地面；該支撐介質基板12之一側邊鄰近該接地面之一側邊111；該輻射金屬部13呈一開口朝向該接地面的U形，並係以蝕刻或印刷技術形成於該支撐介質基板12之一表面121上，其一端為開口端，另一自由端部則電氣連接至該接地面11之短路點112，該輻射金屬部13之長度少於該天線第一(最低)操作頻帶21中心頻率之四分之一波長且具有至少一次以上之彎折；該饋入金屬部14係以蝕刻或印刷技術形成於該支撐介質基板12與該輻射金屬部13相對應之另一表面122上，其一端為天線饋入端141，連接至一信號源15，另一端則與該輻射金屬部重疊142。1 is a structural view of a first embodiment of an antenna according to the present invention, comprising: a ground plane 11, a supporting dielectric substrate 12, a radiating metal portion 13, and a feed metal portion 14. The grounding surface 11 is a supporting metal backing plate of a notebook computer LCD screen or a system grounding surface of a mobile communication device; one side of the supporting dielectric substrate 12 is adjacent to one side 111 of the grounding surface; the radiating metal portion 13 is formed in a U shape facing the ground plane, and is formed on one surface 121 of the supporting dielectric substrate 12 by etching or printing technology, one end of which is an open end, and the other free end is electrically connected to the ground plane. a short circuit point 112 of 11 having a length less than a quarter of a wavelength of a center frequency of the first (lowest) operating band 21 of the antenna and having at least one bend; the feed metal portion 14 is An etching or printing technique is formed on the other surface 122 of the supporting dielectric substrate 12 corresponding to the radiating metal portion 13, one end of which is an antenna feeding end 141, connected to a signal source 15, and the other end is connected to the radiating metal portion. Overlap 142.
第2圖為本發明天線實施例1之實測返回損失圖。其中橫軸代表操作頻率，縱軸代表返回損失。在實施例1中選擇下列尺寸進行量測：接地面11長度約為260 mm、寬度約為200 mm；介質支撐基板12採用長度約為10 mm、寬度約為9 mm、厚度約為0.8 mm的玻纖介質基板；輻射金屬部13為一開口朝向該接地面的U形結構，由一長度約為9 mm 、寬度約為0.5 mm的金屬臂及一長度約為10 mm、寬度約為3.5 mm的金屬臂及一長度約為5 mm、寬度約為2.5 mm的金屬臂共同組成，因此該輻射金屬部之長度總合約為19.5 mm，少於該天線第一(最低)操作頻帶21中心頻率之四分之一波長；饋入金屬部14長度約為6.9 mm、寬度約為1 mm。由實驗量測結果可知，在10 dB返回損失定義下，本發明天線於第一(最低)操作頻帶21可涵蓋2.4 GHz WLAN之頻帶、天線第二操作頻帶22可涵蓋5.2/5.8 GHz WLAN之兩個頻帶，符合無線區域網路之實際應用需求。Fig. 2 is a graph showing the measured return loss of the antenna embodiment 1 of the present invention. The horizontal axis represents the operating frequency and the vertical axis represents the return loss. The following dimensions were selected for measurement in Example 1: the ground plane 11 has a length of about 260 mm and a width of about 200 mm; the dielectric support substrate 12 has a length of about 10 mm, a width of about 9 mm, and a thickness of about 0.8 mm. a fiberglass dielectric substrate; the radiating metal portion 13 is a U-shaped structure having an opening facing the ground plane, and has a length of about 9 mm. a metal arm having a width of about 0.5 mm and a metal arm having a length of about 10 mm and a width of about 3.5 mm and a metal arm having a length of about 5 mm and a width of about 2.5 mm, so that the radiating metal portion The total length contract is 19.5 mm, which is less than a quarter of the center frequency of the first (lowest) operating band 21 of the antenna; the feed metal portion 14 has a length of about 6.9 mm and a width of about 1 mm. It can be seen from the experimental measurement results that the antenna of the present invention can cover the frequency band of 2.4 GHz WLAN in the first (lowest) operating frequency band 21 and the second operating frequency band 22 of the antenna can cover two of the 5.2/5.8 GHz WLANs under the definition of 10 dB return loss. The frequency band meets the practical application requirements of the wireless local area network.
第3圖為本發明之第一其它實施例3結構圖，其中該接地面31具有一彎折312，其他天線結構與實施例1相似。在此相似結構下，實施例3亦可達成在天線所激發之雙頻操作頻帶的良好阻抗匹配，獲得與實施例1近似的結果。3 is a structural view of a first other embodiment 3 of the present invention, wherein the ground plane 31 has a bend 312, and other antenna structures are similar to the embodiment 1. Under this similar configuration, Embodiment 3 can also achieve good impedance matching in the dual frequency operating band excited by the antenna, and obtain a result similar to that of Embodiment 1.
第4圖為本發明之第二其它實施例4結構圖，其中該饋入金屬部44為一T字形結構，其他天線結構與實施例1相似。在此相似結構下，實施例4亦可達成在天線所激發之雙頻操作頻帶的良好阻抗匹配，獲得與實施例1近似的結果。Fig. 4 is a structural view showing a second embodiment 4 of the present invention, wherein the feed metal portion 44 has a T-shaped structure, and other antenna structures are similar to those of the first embodiment. Under this similar configuration, Embodiment 4 can also achieve good impedance matching in the dual frequency operating band excited by the antenna, and obtain a result similar to that of Embodiment 1.
以上說明中所述之實施例僅為說明本發明之原理及其功效，而非限制本發明。因此，習於此技術之人士可在不 違背本發明之精神對上述實施例進行修改及變化。本發明之權利範圍應如後述之申請專利範圍所列。The embodiments described in the above description are merely illustrative of the principles of the invention and its advantages, and are not intended to limit the invention. Therefore, those who are familiar with this technology can Modifications and variations of the above-described embodiments are possible in the spirit of the invention. The scope of the invention should be as set forth in the appended claims.
1‧‧‧本發明天線一實施例1‧‧‧An embodiment of the antenna of the present invention
3‧‧‧本發明天線第一其他實施例3‧‧‧First embodiment of the antenna of the present invention
4‧‧‧本發明天線第二其他實施例4‧‧‧ second embodiment of the antenna of the present invention
11,31‧‧‧接地面或筆記型電腦液晶螢幕之支撐金屬背板或行動通訊裝置之系統接地面11,31‧‧‧System ground plane for ground plane or notebook LCD screen supporting metal backplane or mobile communication device
111,311‧‧‧接地面之一側邊111,311‧‧‧one side of the ground plane
112‧‧‧短路點112‧‧‧ Short circuit point
12‧‧‧支撐介質基板12‧‧‧Supporting dielectric substrate
121‧‧‧支撐介質基板之一表面121‧‧‧Support one surface of the dielectric substrate
122‧‧‧支撐介質基板之另一表面122‧‧‧Support the other surface of the dielectric substrate
13‧‧‧輻射金屬部13‧‧‧ Radiation Metals Department
14,44‧‧‧饋入金屬部14,44‧‧‧Feed in the Metals Department
141‧‧‧天線饋入端，饋入金屬部之一端141‧‧‧ Antenna feed end, fed into one end of the metal part
142,442‧‧‧饋入金屬部另一端，與輻射金屬部重疊142,442‧‧‧Feed into the other end of the metal section, overlapping the radiating metal
15‧‧‧信號源15‧‧‧Signal source
21‧‧‧天線第一(最低)操作頻帶21‧‧‧ antenna first (lowest) operating band
22‧‧‧天線第二操作頻帶22‧‧‧Antenna second operating band
312‧‧‧接地面之一彎折312‧‧‧ One of the grounding surfaces is bent
第1圖為本發明天線一實施例結構圖。Fig. 1 is a structural view showing an embodiment of an antenna according to the present invention.
第2圖為本發明天線一實施例之實測返回損失圖。Fig. 2 is a graph showing the measured return loss of an embodiment of the antenna of the present invention.
第3圖為本發明天線第一其他實施例結構圖。Figure 3 is a block diagram showing the first embodiment of the antenna of the present invention.
第4圖為本發明天線第二其他實施例結構圖。Fig. 4 is a structural view showing a second embodiment of the antenna of the present invention.
1‧‧‧本發明天線一實施例1‧‧‧An embodiment of the antenna of the present invention
11‧‧‧接地面或筆記型電腦液晶螢幕之支撐金屬背板或行動通訊裝置之系統接地面11‧‧‧System ground plane for ground plane or notebook LCD screen supporting metal backplane or mobile communication device
111‧‧‧接地面之一側邊111‧‧‧One side of the grounding surface
112‧‧‧短路點112‧‧‧ Short circuit point
12‧‧‧支撐介質基板12‧‧‧Supporting dielectric substrate
121‧‧‧支撐介質基板之一表面121‧‧‧Support one surface of the dielectric substrate
122‧‧‧支撐介質基板之另一表面122‧‧‧Support the other surface of the dielectric substrate
13‧‧‧輻射金屬部13‧‧‧ Radiation Metals Department
14‧‧‧饋入金屬部14‧‧‧Feed in the Metals Department
141‧‧‧天線饋入端，饋入金屬部之一端141‧‧‧ Antenna feed end, fed into one end of the metal part
142‧‧‧饋入金屬部另一端，與輻射金屬部重疊142‧‧‧Feed into the other end of the metal part, overlapping the radiating metal part
15‧‧‧信號源15‧‧‧Signal source
Claims (7)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW98100827A TWI393290B (en) | 2009-01-10 | 2009-01-10 | A dual-band inverted-f antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW98100827A TWI393290B (en) | 2009-01-10 | 2009-01-10 | A dual-band inverted-f antenna |
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| Publication Number | Publication Date |
|---|---|
| TW201027837A TW201027837A (en) | 2010-07-16 |
| TWI393290B true TWI393290B (en) | 2013-04-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112928458B (en) * | 2019-12-06 | 2025-04-15 | 昆山亿趣信息技术研究院有限公司 | Dual-frequency antenna structure and antenna system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW591818B (en) * | 2002-09-18 | 2004-06-11 | Htc Corp | Broadband couple-fed planar antennas with coupled metal strips on the ground plane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW591818B (en) * | 2002-09-18 | 2004-06-11 | Htc Corp | Broadband couple-fed planar antennas with coupled metal strips on the ground plane |
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