CN111755811A - Dual band antenna - Google Patents
Dual band antenna Download PDFInfo
- Publication number
- CN111755811A CN111755811A CN201910241673.9A CN201910241673A CN111755811A CN 111755811 A CN111755811 A CN 111755811A CN 201910241673 A CN201910241673 A CN 201910241673A CN 111755811 A CN111755811 A CN 111755811A
- Authority
- CN
- China
- Prior art keywords
- radiator
- antenna
- electrically connected
- band antenna
- dual band
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- 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
- H01Q5/10—Resonant antennas
-
- 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
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
-
- 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
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
-
- 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
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/328—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground
Landscapes
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides a dual-band antenna. The dual-band antenna includes a first antenna portion, a second antenna portion and a ground portion. The first antenna part comprises a signal feed-in part, a first radiator and a second radiator. The signal feed-in part is electrically connected to the signal feed-in point to receive the antenna signal. The first radiator is a component antenna device, such as a planar inverted-F antenna. One end of the antenna device is electrically connected to the signal feed-in part, and the other end is electrically connected to the grounding part. The second radiator and the antenna device are respectively arranged on two opposite sides of the signal feed-in part. The second antenna portion includes a third radiator and a fourth radiator. The second radiator and the third radiator form a capacitive feed-in structure. One end of the fourth radiator is electrically connected to the capacitive feeding structure, and the other end is electrically connected to the grounding portion. By the structure, the dual-band antenna can provide two frequency bands.
Description
Technical Field
The present invention relates to a dual band antenna, and more particularly, to a dual band antenna having a small size.
Background
With the rapid development of communication technologies, various communication products, such as Wireless access point (Wireless access point), smart phones, and notebook computers, are also becoming part of human life. Most of these communication products have an antenna device to implement wireless transmission function, so as to meet the needs of consumers. However, as the communication products have more and more functions, smaller and smaller sizes, the antenna device not only needs to provide multiple frequency bands, but also needs to have smaller sizes.
Disclosure of Invention
Embodiments of the present invention provide a dual band antenna, which can provide two frequency bands and has a small size. The dual-band antenna includes a first antenna portion, a second antenna portion and a ground portion. The signal feed-in part is electrically connected to the signal feed-in point to receive the antenna signal. The first radiator constitutes an antenna device. One end of the antenna device is electrically connected to the signal feed-in part, and the other end is electrically connected to the grounding part. The second radiator is electrically connected to the signal feed-in part, wherein the second radiator and the antenna device are arranged on two opposite sides of the signal feed-in part. The second antenna portion includes a third radiator and a fourth radiator. The second radiator is electrically connected to the signal feed-in part. The second radiator and the third radiator form a capacitive feed-in structure, and a gap is formed between the second radiator and the third radiator. One end of the fourth radiator is electrically connected to the third radiator, and the other end is electrically connected to the grounding part.
In some embodiments, the antenna device is a Planar inverted-F antenna (PIFA).
In some embodiments, the planar inverted F antenna comprises a U-shaped structure and a connector. One end of the U-shaped structure is electrically connected to the signal feed-in part. The connecting body is electrically connected between the other end of the U-shaped structure and the grounding part.
In some embodiments, the U-shaped structure has an opening facing the signal feeding portion.
In some embodiments, the second radiator has a first extension portion, and the third radiator has a second extension portion. The first extension part extends towards the third radiator, and the second extension part extends towards the second radiator.
In some embodiments, the first extension is parallel to the second extension.
In some embodiments, the dual band antenna further includes an inductor electrically connected between the fourth radiator and the ground.
In some embodiments, the fourth radiator is L-shaped.
Drawings
In order to make the aforementioned and other objects, features, and advantages of the invention, as well as others which will become apparent, reference should be made to the following detailed description of the preferred embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural diagram illustrating a dual band antenna according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram illustrating a dual-band antenna according to a second embodiment of the invention; and
fig. 3 is a schematic diagram illustrating a resonance curve of a dual band antenna according to an embodiment of the present invention.
Detailed Description
As used herein, "first," "second," …, etc., do not denote any order or sequence, but rather are used to distinguish one element or operation from another element or operation described in the same technical language.
Fig. 1 is a schematic structural diagram of a dual-band antenna 100 according to a first embodiment of the invention. The dual band antenna 100 includes a first antenna part 110, a second antenna part 120, and a ground part 130. The first antenna portion 110 includes a signal feeding portion 112, a plurality of first radiators 114a and 114b, and a second radiator 116. The signal feeding part 112 is electrically connected to the signal feeding point FP for receiving the antenna signal. In the present embodiment, the antenna signal is fed to the signal feeding portion 112 through a signal feeding element (e.g., a coaxial line). Specifically, the signal feeding element includes a signal end and a ground end, wherein the signal end of the signal feeding element is connected to the signal feeding point FP, and the ground end of the signal feeding element is connected to the ground portion 130.
The first radiators 114a and 114b form an antenna device and are electrically connected to the signal feeding portion 112 to receive antenna signals. In the present embodiment, the antenna device is a Planar inverted-F antenna (PIFA), but the embodiments of the present invention are not limited thereto. As shown in fig. 1, in the present embodiment, the first radiator 114a is a U-shaped structure, one end of which is electrically connected to the signal feeding portion 112, and the other end of which is electrically connected to the first radiator 114 b. The first radiator 114b is a grounded connector electrically connected between the first radiator 114a and the ground 130, so as to electrically ground the antenna device. The first radiator 114a has an opening 114O facing the signal feeding portion 112. In addition, the first radiator 114b is parallel to the signal feeding part 112.
The second radiator 116 is electrically connected to the signal feeding portion 112 for receiving the antenna signal. The antenna device formed by the first radiators 114a and 114b and the second radiator 116 are respectively located at two opposite sides of the signal feeding portion 112, and the second radiator 116 extends toward the second antenna portion 120.
The second antenna portion 120 includes a third radiator 122 and a fourth radiator 124. In the present embodiment, the second radiator 116 has a first extension portion 116a, which extends toward the third radiator 122 and is not in contact with the third radiator 122. The third radiator 122 has a second extension portion 122a, which extends toward the second radiator 116 and is not in contact with the second radiator 116. Specifically, the second radiator 116 and the third radiator 122 have a gap G therebetween, which physically separates the second radiator 116 and the third radiator 122. Thus, the second radiator 116 and the third radiator 122 can form a capacitive feed (capacitive feed) structure. In addition, in the embodiment, the second radiator 116 and the third radiator 122 are L-shaped, and the first extension portion 116a is parallel to the second extension portion 122a, but the embodiment of the invention is not limited thereto.
The fourth radiator 124 is electrically connected to the third radiator 122 to receive the antenna signal. In the present embodiment, the fourth radiator 124 is L-shaped, and one end thereof is electrically connected to the third radiator 122, and the other end thereof is electrically connected to the ground 130. In addition, in the present embodiment, the first antenna portion 110, the second antenna portion 120 and the grounding portion 130 are all metal sheets and are disposed on the circuit board CB. For example, the first antenna portion 110, the second antenna portion 120, and the ground portion 130 may be made of a copper sheet, but the embodiment of the invention is not limited thereto.
In the prior art, the conventional 1/2 wavelength loop antenna can only provide high frequency components. Compared with the prior art, the present invention can apply the capacitive feeding structure composed of the second radiator 116 and the third radiator 122 to additionally provide the low frequency component. Therefore, the dual-band antenna 100 of the present invention can achieve the dual-band function and has a smaller antenna volume. As the antenna volume becomes smaller, more antennas (e.g., multiple-input multiple-output (MIMO)) can be placed in the same space, thereby achieving high transmission rates. Furthermore, the dual-band antenna 100 of the present invention is placed at the top left corner and the top right corner of an electronic product (e.g., a smart phone), which can achieve high transmission rate and performance similar to an omnidirectional pattern, and is helpful to increase the signal coverage, and is suitable for Wifi communication systems or communication systems suitable for this band.
Fig. 2 is a schematic structural diagram of a dual-band antenna 200 according to a second embodiment of the invention. The dual band antenna 200 is similar to the dual band antenna 100, but differs in that the dual band antenna 200 also includes an inductance 250. The inductor 250 is electrically connected between the fourth radiator 124 and the grounding portion 130. The inductor 250 is used to adjust the resonance characteristics of the dual band antenna 200.
Referring to fig. 3, a schematic diagram of a resonance curve 100C of the dual-band antenna 100 and a resonance curve 200C of the dual-band antenna 200 according to the embodiment of the invention is shown, wherein a vertical axis of a coordinate represents a Voltage Standing Wave Ratio (VSWR). As shown in fig. 3, the resonant frequencies of the dual band antenna 100 are 2.9GHz and 7 GHz. By providing the inductor 250, the dual-band antenna 200 can adjust the resonant frequency to 2430MHz and 5810MHz, so that the dual-band antenna 200 can provide two bands of 2G and 5G.
While the present invention has been described with reference to the embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and therefore, the scope of the invention is to be determined by the appended claims.
Claims (10)
1. A dual band antenna, comprising:
a grounding part;
a first antenna portion, comprising:
a signal feed-in part electrically connected to a signal feed-in point for receiving an antenna signal;
a plurality of first radiators forming an antenna device, wherein one end of the antenna device is electrically connected to the signal feed-in part, and the other end of the antenna device is electrically connected to the grounding part; and
the second radiator is electrically connected to the signal feed-in part, wherein the second radiator and the antenna device are arranged on two opposite sides of the signal feed-in part; and
a second antenna portion comprising:
a third radiator, wherein the second radiator and the third radiator form a capacitive feed-in structure, and a gap is formed between the second radiator and the third radiator; and
a fourth radiator, wherein one end of the fourth radiator is electrically connected to the third radiator, and the other end of the fourth radiator is electrically connected to the ground.
2. The dual band antenna of claim 1, wherein the antenna device is a Planar inverted-F antenna (PIFA).
3. The dual band antenna of claim 2, wherein the planar inverted-F antenna comprises:
one end of the U-shaped structure is electrically connected to the signal feed-in part; and
and the connecting body is electrically connected between the other end of the U-shaped structure and the grounding part.
4. The dual band antenna of claim 3, wherein the U-shaped structure has an opening facing the signal feed.
5. The dual band antenna of claim 3, wherein the connector is parallel to the signal feed.
6. The dual band antenna of claim 1, wherein the second radiator has a first extension, the third radiator has a second extension, the first extension extends toward the third radiator, and the second extension extends toward the second radiator.
7. The dual band antenna of claim 6, wherein the first extension is parallel to the second extension.
8. The dual band antenna of claim 1, wherein the fourth radiator is directly connected to the ground.
9. The dual band antenna of claim 1, further comprising an inductor electrically connected between the fourth radiator and the ground.
10. The dual band antenna of claim 1, wherein the fourth radiator is L-shaped.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910241673.9A CN111755811A (en) | 2019-03-28 | 2019-03-28 | Dual band antenna |
| TW108118288A TW202036986A (en) | 2019-03-28 | 2019-05-27 | Dual-band antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910241673.9A CN111755811A (en) | 2019-03-28 | 2019-03-28 | Dual band antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111755811A true CN111755811A (en) | 2020-10-09 |
Family
ID=72671695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910241673.9A Pending CN111755811A (en) | 2019-03-28 | 2019-03-28 | Dual band antenna |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111755811A (en) |
| TW (1) | TW202036986A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022111054A1 (en) * | 2020-11-30 | 2022-06-02 | Oppo广东移动通信有限公司 | Antenna apparatus, housing, and electronic device |
| WO2022182336A1 (en) * | 2021-02-23 | 2022-09-01 | Hewlett-Packard Development Company, L.P. | Antenna radiators selections |
| CN115296012A (en) * | 2021-05-03 | 2022-11-04 | 和硕联合科技股份有限公司 | Antenna Modules and Electronics |
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2019
- 2019-03-28 CN CN201910241673.9A patent/CN111755811A/en active Pending
- 2019-05-27 TW TW108118288A patent/TW202036986A/en unknown
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| WO2022111054A1 (en) * | 2020-11-30 | 2022-06-02 | Oppo广东移动通信有限公司 | Antenna apparatus, housing, and electronic device |
| WO2022182336A1 (en) * | 2021-02-23 | 2022-09-01 | Hewlett-Packard Development Company, L.P. | Antenna radiators selections |
| CN115296012A (en) * | 2021-05-03 | 2022-11-04 | 和硕联合科技股份有限公司 | Antenna Modules and Electronics |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202036986A (en) | 2020-10-01 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20201009 |