CN111490336B - Miniature antenna structure suitable for multifrequency - Google Patents
Miniature antenna structure suitable for multifrequency Download PDFInfo
- Publication number
- CN111490336B CN111490336B CN202010376868.7A CN202010376868A CN111490336B CN 111490336 B CN111490336 B CN 111490336B CN 202010376868 A CN202010376868 A CN 202010376868A CN 111490336 B CN111490336 B CN 111490336B
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- circuit board
- radiation
- antenna structure
- feed
- frame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Waveguide Aerials (AREA)
- Support Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides a micro antenna structure suitable for multi-frequency, which comprises a circuit board, a first radiation piece, a second radiation piece and a frame. The circuit board comprises a feed-in point and a grounding point, the first radiation element comprises a first feed-in part, a grounding part and a first radiation part, the first feed-in part is electrically connected with the feed-in point, and the grounding part is electrically connected with the grounding point. The second radiation element comprises a second feed-in part and a second radiation part, and the circuit board is arranged between the first radiation element and the second radiation element. The frame comprises a groove, the second radiation piece is arranged between the circuit board and the frame, and the second radiation part and the groove are excited to generate a resonance mode.
Description
Technical Field
The present invention relates to an antenna structure, and more particularly, to a micro antenna structure capable of effectively utilizing the internal space of a mobile device.
Background
In the conventional antenna design, most antennas are designed in a solid antenna module manner, and the solid antenna is disposed in a plastic solid, and then matched with a feed point or a contact module on a Circuit board through a Flexible Printed Circuit (FPC) or a Laser Direct Structure (LDS) program to form the conventional micro antenna.
Fig. 1A and 1B are schematic diagrams illustrating a conventional micro antenna disposed on a mobile device. As shown in fig. 1A and fig. 1B, the solid antenna is matched with a clearance space formed by the antenna support to realize a multi-frequency resonance structure of the antenna. However, such a design requires a high clearance for the resonant structure of the antenna, and the performance of the antenna becomes very unstable in the all-metal frame of the mobile device. Taking the antenna shown in fig. 1A and 1B as an example, the micro-antenna a needs to operate in the dual band of 433/915MHz, the low frequency wavelength of the micro-antenna a is extremely long, but the metal frame F does not have enough winding and clearance space, resulting in poor practical efficiency and insufficient effective bandwidth. The reason why the communication of the micro antenna a is poor or even fails is that the micro antenna a is easily deviated in the production process when being assembled, so that the micro antenna a falls out of the default operating frequency band.
How to control the operating frequency band of the micro antenna by improving the structural design and overcome the above-mentioned drawbacks has become one of the important issues to be solved by the industry.
Disclosure of Invention
The technical problem to be solved by the invention is that the multi-frequency antenna of the micro antenna is unstable, and the micro antenna structure is provided aiming at the defects of the prior art, so that the space utilization inside the mobile device is enhanced, and the aim of controlling the working frequency band of the micro antenna is fulfilled.
In accordance with the above objective, the present invention provides a micro antenna structure for use in multiple frequencies, which includes a circuit board, a first radiating element, a second radiating element and a frame. The circuit board comprises a feed-in point and a grounding point, the first radiation element comprises a first feed-in part, a grounding part and a first radiation part, the first feed-in part is electrically connected with the feed-in point, and the grounding part is electrically connected with the grounding point. The second radiation element comprises a second feed-in part and a second radiation part, and the circuit board is arranged between the first radiation element and the second radiation element. The frame comprises a groove, the second radiation piece is arranged between the circuit board and the frame, and the second radiation part and the groove are excited to generate a resonance mode.
Further, a perpendicular projection of the second radiation portion with respect to the circuit board at least partially overlaps a perpendicular projection of the recess with respect to the circuit board.
Further, the frame is a metal frame.
Furthermore, the first radiating element is a planar inverted-F antenna.
Further, the recess is filled with a high dielectric constant filling material.
Further, the first radiating element is capable of exciting to produce at least one resonant mode.
Furthermore, the second radiation element and the groove of the frame are excited to generate at least one resonance mode.
Furthermore, an opening of the groove is an L-shaped opening, and a vertical projection of the second radiation part of the second radiation piece relative to the circuit board is overlapped with a part of a short side of the L-shaped opening of the groove relative to a vertical projection of the circuit board.
Furthermore, the first radiation member is disposed on a housing of a mobile device, and the housing is used for covering the frame.
The invention has the advantages that the micro antenna structure suitable for multi-frequency can effectively apply the frame of the mobile device and the circuit board inside the mobile device without additionally arranging an antenna structure, thereby achieving the effect of saving space, increasing the bandwidth of the antenna and achieving the aim of multi-frequency.
For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.
Drawings
Fig. 1A and 1B are schematic diagrams illustrating a conventional micro antenna disposed on a mobile device.
Fig. 2A is an exploded view of a micro-antenna structure for multi-frequency according to a first embodiment of the present invention.
Fig. 2B is a perspective view of a micro antenna structure suitable for multiple frequencies according to a first embodiment of the present invention.
Fig. 2C is a schematic diagram illustrating the overlapping of the groove and the second radiation element according to the first embodiment of the invention.
Detailed Description
The following is a description of the embodiments of the present disclosure related to "micro antenna structure for multi-frequency", and those skilled in the art will understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or from one signal to another signal. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.
For clarity of explanation, in some cases the present techniques may be presented as including individual functional blocks comprising functional blocks, including steps or routes in a method implemented in a device, device component, software, or a combination of hardware and software.
An apparatus implementing methods in accordance with these disclosures may include hardware, firmware, and/or software, and may take any of a variety of forms. Typical examples of such features include laptops, smart phones, small personal computers, personal digital assistants, and the like. The functionality described herein may also be implemented in a peripheral device or in an embedded card. By way of further example, such functionality may also be implemented on different chips or on different boards executing different programs on a single device.
Examples of the invention
Fig. 2A is an exploded view of a micro-antenna structure suitable for use in multiple frequencies according to a first embodiment of the present invention, and fig. 2B is a perspective view of the micro-antenna structure according to the first embodiment of the present invention. As shown in fig. 2A and fig. 2B, an embodiment of the invention provides a micro antenna structure 10, which includes a circuit board 12, a first radiation element 14, a second radiation element 16, and a frame 18.
The circuit board 12 includes a feeding point 121 and a grounding point 122, the feeding point 121 provides a micro antenna signal, and the installation position of the feeding point 121 guides a path transmitted to the micro antenna, thereby affecting the radiation of the electromagnetic wave of the micro antenna. In the first embodiment of the present invention, the feeding point 121 and the grounding point 122 may be formed on the first surface 123 of the circuit board 12 and penetrate through the circuit board 12 to be exposed on the second surface 124 of the circuit board 12, and the feeding point 121 and the grounding point 122 may penetrate through the circuit board 12 by forming a through hole on the circuit board 12, so that the feeding point 121 and the grounding point 122 may penetrate through the circuit board 12, and the feeding point 121 and the grounding point 122 may be electrically connected to the second radiation element 16. It should be noted that the circuit board 12 of the present invention has other metal lines besides the feeding point 121 and the grounding point 122, so that the signal of the mobile device can be transmitted to the feeding point 121 on the circuit board 12 through the metal lines, however, the metal lines are not essential to the present invention and are not shown in the drawings of the present invention.
The first radiation element 14 includes a first feeding portion 141, a grounding portion 142 and a first radiation portion 143, the first radiation element 14 is disposed on the first surface 123 of the first surface of the circuit board 12, the first feeding portion 141 is electrically connected to the feeding point 121 of the circuit board 12, and the grounding portion 142 is electrically connected to the grounding point 122 of the circuit board 12. Further, the feeding point 121 of the circuit board 12 further includes a spring 125, so that the rf signal can be fed from the spring 125 of the feeding point 121 to the first feeding portion 141 of the first radiation element 14, and then the rf signal is transmitted to the grounding portion 142 through the first radiation portion 143, so that the first radiation element 14 is excited to generate at least one resonance mode. In the preferred embodiment of the present invention, the first radiating element 14 is preferably a Planar Inverted-F Antenna (PIFA), in which the first feeding element 141 is disposed parallel to the grounding element 142, and the first radiating element 143 is disposed perpendicular to the first feeding element 141 and the grounding element 142.
The second radiation element 16 includes a second feeding portion 161 and a second radiation portion 162, and the second radiation element 16 is disposed under the circuit board 12, in other words, the circuit board 12 is disposed between the first radiation element 14 and the second radiation element 16. The second radiation portion 162 is electrically connected to the feeding point 121 of the second surface 124 of the circuit board 12, so that the rf signal can pass through the circuit board 12 through the feeding point 121 of the circuit board 12 to the second feeding portion 161 of the second radiation element 16, and then pass through the second feeding portion 161 to the second radiation portion 162. The frame 18 is a frame of a mobile device, and the frame 18 of the present invention is preferably made of metal, and the frame 18 is disposed below the second radiation element 16, in other words, the second radiation element 16 is located between the circuit board 12 and the frame 18. In addition, the frame 18 includes a recess 181, and the second radiation portion 162 of the second radiation element 16 covers an opening 182 of a portion of the recess 181 of the frame 18, that is, a vertical projection of the second radiation portion 162 of the second radiation element 16 with respect to the circuit board 12 at least partially overlaps a vertical projection of the recess 181 of the frame 18 with respect to the circuit board 12, so that the second radiation portion 162 and the recess 181 of the frame 18 can excite to generate at least one resonant mode. In the first embodiment of the present invention, a filling material with a high dielectric coefficient may be filled in the groove 181, so as to achieve the effect of reducing the operating center frequency of the antenna.
Further, the first radiation element 14 may be disposed on the housing of the mobile device, however, in different embodiments, a flexible printed circuit board may be additionally installed to install the first radiation element 14 on the flexible printed circuit board, and the invention is not limited thereto. The casing of the mobile device is preferably made of plastic material to prevent the internal micro antenna from being interfered by the casing and causing the frequency band of the micro antenna to drift. The second radiation element 16 is preferably mounted on the second surface 124 of the circuit board 12 inside the mobile device, or in different embodiments, the second radiation element 16 may be mounted on another flexible circuit board, and the flexible circuit board is placed between the circuit board 12 and the frame 18, which is not limited herein, so as to achieve the purpose of saving space.
It should be noted that the shapes of the first radiating element 14, the second radiating element 16 and the groove 181 are only examples of the preferred embodiment, and are not intended to limit the present invention, and the shapes of the first radiating element 14, the second radiating element 16 or the groove 181 may be only the shapes described above, and the first radiating element 14 is preferably an inverted-F antenna, but in different embodiments, the first radiating element 14 may be an antenna with any shape. In addition, the opening 182 of the notch 181 is an L-shaped opening in the preferred embodiment of the invention, and the second radiation element 16 covers a part of the opening 182 to form a resonant mode, but in different embodiments, the opening 182 of the notch 181 may be an opening with different shapes, and any operating frequency band capable of exciting a resonant mode with the second radiation element 16 to generate a low frequency may be the shape of the opening 182 of the notch 181, which is not limited herein. The purpose that the micro antenna can form multi-frequency signals is achieved by generating high frequency through the first radiation piece 14 and generating low frequency through the second radiation piece 16 and the groove of the frame, and the micro antenna structure of the invention mainly utilizes the existing structure in the original mobile device to achieve the purpose that the micro antenna generates multi-frequency signals, and can also achieve the purposes of reducing space utilization and reducing cost.
The invention has the advantages that the micro antenna structure suitable for multi-frequency can effectively apply the frame of the mobile device and the circuit board inside the mobile device without additionally arranging an antenna structure, thereby achieving the effect of saving space, increasing the bandwidth of the antenna and achieving the aim of multi-frequency.
The disclosure is only a preferred embodiment of the invention and should not be taken as limiting the scope of the invention, which is defined by the appended claims.
Claims (8)
1. A micro-antenna structure adapted for use in multiple frequencies, the micro-antenna structure comprising:
the circuit board comprises a feed-in point and a grounding point;
the first radiation element is arranged on the first surface of the circuit board and comprises a first feed-in part, a grounding part and a first radiation part, wherein the first feed-in part is electrically connected with the feed-in point, and the grounding part is electrically connected with the grounding point;
the second radiation piece is arranged on the second surface of the circuit board and comprises a second feed-in part and a second radiation part, and the second feed-in part is electrically connected with the feed-in point; and
the frame comprises a groove, the second radiation piece is arranged between the circuit board and the frame, and the second radiation part and the groove excite to generate a resonance mode;
the feed-in point is arranged on the first surface of the circuit board and penetrates through the circuit board to be exposed on the second surface of the circuit board;
wherein a perpendicular projection of the second radiation portion with respect to the circuit board at least partially overlaps a perpendicular projection of the groove with respect to the circuit board.
2. A miniature antenna structure adapted for use with multiple frequencies as set forth in claim 1, wherein said frame is a metal frame.
3. The micro-antenna structure for multi-frequency according to claim 1, wherein the first radiating element is a planar inverted-F antenna.
4. A miniature antenna structure for multiple frequencies according to claim 1, wherein said cavities are filled with a high dielectric constant filler material.
5. A miniature antenna structure for multiple frequencies according to claim 1 wherein said first radiating element is capable of exciting at least one resonant mode.
6. The micro-antenna structure for multi-frequency according to claim 1, wherein the second radiation element and the groove of the frame excite at least one of the resonance modes.
7. The micro-antenna structure for multi-frequency according to claim 1, wherein an opening of the slot is an L-shaped opening, and a vertical projection of the second radiating portion of the second radiating element with respect to the circuit board overlaps a portion of a short side of the L-shaped opening of the slot with respect to a vertical projection of the circuit board.
8. The micro-antenna structure for multi-frequency according to claim 1, wherein the first radiating element is disposed on a housing of a mobile device, the housing being used for covering the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376868.7A CN111490336B (en) | 2020-05-07 | 2020-05-07 | Miniature antenna structure suitable for multifrequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376868.7A CN111490336B (en) | 2020-05-07 | 2020-05-07 | Miniature antenna structure suitable for multifrequency |
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| Publication Number | Publication Date |
|---|---|
| CN111490336A CN111490336A (en) | 2020-08-04 |
| CN111490336B true CN111490336B (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010376868.7A Active CN111490336B (en) | 2020-05-07 | 2020-05-07 | Miniature antenna structure suitable for multifrequency |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101102007A (en) * | 2006-07-07 | 2008-01-09 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency antenna |
| CN103094692A (en) * | 2011-11-03 | 2013-05-08 | 仁宝电脑工业股份有限公司 | Slot antenna |
| CN103545611A (en) * | 2012-07-12 | 2014-01-29 | 深圳富泰宏精密工业有限公司 | Wireless communication device |
| CN107403992A (en) * | 2016-05-20 | 2017-11-28 | 中兴通讯股份有限公司 | A kind of antenna and terminal device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100361346C (en) * | 2001-04-23 | 2008-01-09 | 株式会社友华 | Broad-band antenna for mobile communication |
| JP4044302B2 (en) * | 2001-06-20 | 2008-02-06 | 株式会社村田製作所 | Surface mount type antenna and radio using the same |
| JP2004201278A (en) * | 2002-12-06 | 2004-07-15 | Sharp Corp | Pattern antenna |
| FR2857165A1 (en) * | 2003-07-02 | 2005-01-07 | Thomson Licensing Sa | BI-BAND ANTENNA WITH DOUBLE ACCESS |
| CN110459856A (en) * | 2018-05-08 | 2019-11-15 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with the antenna structure |
-
2020
- 2020-05-07 CN CN202010376868.7A patent/CN111490336B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101102007A (en) * | 2006-07-07 | 2008-01-09 | 富士康(昆山)电脑接插件有限公司 | Multi-frequency antenna |
| CN103094692A (en) * | 2011-11-03 | 2013-05-08 | 仁宝电脑工业股份有限公司 | Slot antenna |
| CN103545611A (en) * | 2012-07-12 | 2014-01-29 | 深圳富泰宏精密工业有限公司 | Wireless communication device |
| CN107403992A (en) * | 2016-05-20 | 2017-11-28 | 中兴通讯股份有限公司 | A kind of antenna and terminal device |
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| Publication number | Publication date |
|---|---|
| CN111490336A (en) | 2020-08-04 |
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