CN214797705U - Compact antenna system for handheld device - Google Patents
Compact antenna system for handheld device Download PDFInfo
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- CN214797705U CN214797705U CN202121288154.7U CN202121288154U CN214797705U CN 214797705 U CN214797705 U CN 214797705U CN 202121288154 U CN202121288154 U CN 202121288154U CN 214797705 U CN214797705 U CN 214797705U
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Abstract
The utility model discloses a compact antenna system for handheld device, which comprises a dielectric substrate, wherein a square groove is arranged at the top of one side of the dielectric substrate, a first antenna is arranged in the square groove, a U-shaped groove is arranged at the top of the other side of the dielectric substrate, and a second antenna is arranged in the U-shaped groove; the first antenna comprises a coupling parasitic branch arranged at the top in the square groove, and a coupling feed branch is arranged on one side, far away from the second antenna, of the coupling parasitic branch. Has the advantages that: by arranging two sets of antenna assemblies, each set of antenna supports broadband coverage, and can support the connection requirement of two transceivers to realize the communication function of most of the current products; and because the scheme adopted by the two sets of antennas has obvious difference in working mechanism, the two sets of antennas still have good isolation effect under close-range layout, so that the problem of mutual interference is avoided, and the antenna is very suitable for being applied to compact products such as the Internet of things.
Description
Technical Field
The utility model relates to an antenna system field particularly, relates to a compact antenna system for handheld device.
Background
Electronic devices such as cell phones and the internet of things are often provided with wireless communication capabilities. To meet the user demand for portable devices, manufacturers are continually striving to implement antenna assemblies in wireless communication systems using compact structures. However, the current communication technology is a complex system, and the terminal product needs to support multi-frequency multi-mode cellular communication and also has functions of GPS positioning, WiFi/bluetooth local interconnect (WLAN), and the like, so that the performance of the antenna in a compact structure is sacrificed due to the mutual interference problem. Therefore, it becomes a valuable technical challenge to increase the isolation of the antenna and eliminate the effect of mutual interference.
In order to achieve high isolation between two antennas, the existing mainstream technology often occupies a large volume, or the layout of the two antennas in a product structure is pulled far as possible, and the problem is solved by increasing the volume and the distance, and the design difficulty and the cost of the product are often increased by the method.
Patent No. CN205081215U discloses a handheld device and navigation antenna module, which includes a circuit board; a B3 wave band antenna mounted on the circuit board; and an L-band antenna and an S-band antenna horizontally spaced from the B3-band antenna and mounted on the circuit board, wherein the antenna module has a smaller width dimension and is suitable for handheld devices. However, in the patent, the two antenna systems are respectively arranged on two sides of the circuit board, but the mutual interference problem between the two antenna systems is not further optimized, and certain influence is generated on signals and performance under the condition of reducing the distance between the two antenna systems.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
To the problem in the related art, the utility model provides a compact antenna system for handheld device to overcome the above-mentioned technical problem that prior art exists.
Therefore, the utility model discloses a specific technical scheme as follows:
a compact antenna system for handheld equipment comprises a dielectric substrate, wherein a square groove is formed in the top of one side of the dielectric substrate, a first antenna is arranged in the square groove, a U-shaped groove is formed in the top of the other side of the dielectric substrate, and a second antenna is arranged in the U-shaped groove;
the first antenna comprises a coupling parasitic branch arranged at the top in the square groove, and a coupling feed branch is arranged on one side, far away from the second antenna, of the coupling parasitic branch.
Furthermore, in order to avoid direct contact between the coupling parasitic branch and the coupling feed branch, and to surround the coupling feed branch through the coupling parasitic branch to form a capacitive coupling gap, the end of the coupling feed branch transfers radio frequency energy to the coupling parasitic branch in a capacitive coupling manner, and the isolation effect between the coupling parasitic branch and the second antenna is enhanced.
Furthermore, in order to form an electrical connection between the coupling feed branch and the dielectric substrate, the coupling feed branch is of an L-shaped structure, and a first radio frequency circuit is arranged between the bottom of the coupling feed branch and the dielectric substrate.
Furthermore, in order to prevent the first antenna from directly contacting the dielectric substrate and protect the normal operation of the whole circuit, the capacitive coupling gap and the square groove are both provided with insulating media.
Furthermore, in order to enable the second antenna to be electrically connected with the dielectric substrate, a second radio frequency circuit is arranged between the bottom of the second antenna and the dielectric substrate.
The utility model has the advantages that:
1. by arranging two sets of antenna assemblies, each set of antenna supports broadband coverage, and can support the connection requirement of two transceivers to realize the communication function of most of the current products; and because the scheme adopted by the two sets of antennas has obvious difference in working mechanism, the two sets of antennas still have good isolation effect under close-range layout, so that the problem of mutual interference is avoided, and the antenna is very suitable for being applied to compact products such as the Internet of things.
2. By allowing the adjacent layout of the two antenna assemblies and completely concentrating to the same side of the dielectric substrate, the occupied space is small, thereby being beneficial to the miniaturization design of products.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a compact antenna system for a handheld device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a first antenna structure of a compact antenna system for a handheld device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a second antenna structure in a compact antenna system for a handheld device according to an embodiment of the present invention;
fig. 4 is a graph of the standing wave ratio performance of the first antenna and the second antenna port in a compact antenna system for a handheld device according to an embodiment of the present invention;
fig. 5 is a circuit block diagram of an application of a compact antenna system for a handheld device to implement an LTE main diversity antenna system on a wireless terminal product according to an embodiment of the present invention;
fig. 6 is a structural size diagram of an application of a compact antenna system for a handheld device to implement an LTE main diversity antenna system on a wireless terminal product according to an embodiment of the present invention;
fig. 7 is a graph of performance levels of a dual antenna for implementing an LTE main diversity antenna system on a wireless terminal product, using a compact antenna system for a handheld device according to an embodiment of the present invention;
fig. 8 is a circuit block diagram of a compact antenna system for a handheld device applied to a dual antenna system for implementing LTE and GPS & WiFi on a wireless terminal product according to an embodiment of the present invention;
fig. 9 is a structural size diagram of a dual-antenna system for implementing LTE and GPS & WiFi on a compact antenna system wireless terminal product for a handheld device according to an embodiment of the present invention.
In the figure:
1. a dielectric substrate; 2. a square groove; 3. a first antenna; 301. coupling parasitic branches; 302. coupling the feed branch; 4. a U-shaped groove; 5. a second antenna; 6. a capacitive coupling gap; 7. a first radio frequency circuit; 8. an insulating medium; 9. a second radio frequency circuit.
Detailed Description
For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.
According to an embodiment of the present invention, a compact antenna system for a handheld device is provided.
Referring now to the drawings and the detailed description, as shown in fig. 1-9, the compact antenna system for handheld device according to the embodiment of the present invention includes a dielectric substrate 1, a square groove 2 is formed on the top of one side of the dielectric substrate 1, a first antenna 3 is disposed inside the square groove 2, a U-shaped groove 4 is formed on the top of the other side of the dielectric substrate 1, and a second antenna 5 is disposed inside the U-shaped groove 4;
the first antenna 3 includes a coupling parasitic branch 301 disposed at the top of the square slot 2, and a coupling feeding branch 302 is disposed on a side of the coupling parasitic branch 301 away from the second antenna 5.
By means of the technical scheme, two sets of antenna assemblies are arranged, each set of antenna supports broadband coverage, and the connection requirements of two transceivers can be supported to realize the communication function of most of the existing products; and because the scheme adopted by the two sets of antennas has obvious difference in working mechanism, the two sets of antennas still have good isolation effect under close-range layout, so that the problem of mutual interference is avoided, and the antenna is very suitable for being applied to compact products such as the Internet of things. By allowing the adjacent layout of the two antenna assemblies and completely concentrating on the same side of the dielectric substrate 1, the occupied space is small, thereby being beneficial to the miniaturization design of products.
In an embodiment, for the coupling parasitic branch 301, the coupling parasitic branch 301 and the coupling feed branch 302 form a semi-enclosed structure, and a capacitive coupling gap 6 is formed between the coupling parasitic branch 301 and the coupling feed branch 302, so as to avoid direct contact between the coupling parasitic branch 301 and the coupling feed branch 302, and the coupling parasitic branch 301 encloses the coupling feed branch 302 to form the capacitive coupling gap 6, so that the end of the coupling feed branch 302 transfers radio frequency energy to the coupling parasitic branch 301 in a capacitive coupling manner, and the isolation effect between the coupling parasitic branch 301 and the second antenna 5 is enhanced.
In one embodiment, for the above coupling feed branch 302, the coupling feed branch 302 is an L-shaped structure, and the first radio frequency circuit 7 is disposed between the bottom of the coupling feed branch 302 and the dielectric substrate 1, so that the coupling feed branch 302 and the dielectric substrate 1 form an electrical connection.
In one embodiment, for the capacitive coupling gap 6, the insulating medium 8 is disposed inside the capacitive coupling gap 6 and the square groove 2, so as to prevent the first antenna 3 from directly contacting the dielectric substrate 1, and protect the normal operation of the whole circuit.
In one embodiment, for the second antenna 5, a second radio frequency circuit 9 is disposed between the bottom of the second antenna 5 and the dielectric substrate 1, so that the second antenna 5 is electrically connected to the dielectric substrate 1.
For the convenience of understanding the technical solution of the present invention, the following detailed description is made on the working principle or the operation mode of the present invention in the practical process.
In practical application, the antenna system is assembled in a small handheld device, wherein a source point of the coupling feed branch 302 is connected with a radio frequency circuit of a wireless communication system, the tail end of the coupling feed branch 302 transfers radio frequency energy to the coupling parasitic branch 301 in a capacitive coupling mode, and the tail end of the coupling parasitic branch 301 is connected with the dielectric substrate 1.
The radiation mechanisms of the two antennas are different, the high-frequency radiators of the two antennas are respectively arranged at two sides of the dielectric substrate 1, the distance is farthest, and the coupling parasitic branch 301 of the first antenna 3 in the middle is separated from the ground of the dielectric substrate 1 at the periphery of the second antenna 5, so that the two antennas have quite good isolation performance; the low-frequency radiators of the two antennas, the first antenna 3 mainly depends on the coupling parasitic branch 301, and the second antenna 5 mainly utilizes the ground on the upper edge of the dielectric substrate 1, so that the isolation effect is also guaranteed.
In addition, LB in fig. 2 and fig. 3 represents Low Band, HB represents High Band, which represents the main radiator corresponding to the antenna operating in different frequency bands, that is, the portion mainly contributing to performance, and fig. 4 is a diagram illustrating the port standing-wave ratio performance of the first antenna 3 and the second antenna 5.
Fig. 5, 6 and 7 are circuit block diagrams, structural size diagrams and performance level graphs of the LTE main diversity antenna system implemented by the antenna system on a wireless terminal product.
Fig. 8 and 9 are a circuit block diagram and a structural size diagram of a dual-antenna system for implementing LTE, GPS and WiFi on the wireless terminal product of the antenna system.
In summary, with the aid of the technical solution of the present invention, by setting two sets of antenna assemblies, each set of antenna supports broadband coverage, and can support the connection requirement of two transceivers to realize the communication function of most of the existing products; and because the scheme adopted by the two sets of antennas has obvious difference in working mechanism, the two sets of antennas still have good isolation effect under close-range layout, so that the problem of mutual interference is avoided, and the antenna is very suitable for being applied to compact products such as the Internet of things. By allowing the adjacent layout of the two antenna assemblies and completely concentrating on the same side of the dielectric substrate 1, the occupied space is small, thereby being beneficial to the miniaturization design of products.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A compact antenna system for a handheld device comprising a dielectric substrate (1), characterized in that:
a square groove (2) is formed in the top of one side of the dielectric substrate (1), a first antenna (3) is arranged in the square groove (2), a U-shaped groove (4) is formed in the top of the other side of the dielectric substrate (1), and a second antenna (5) is arranged in the U-shaped groove (4);
the first antenna (3) comprises a coupling parasitic branch (301) arranged at the top in the square groove (2), and a coupling feed branch (302) is arranged on one side, far away from the second antenna (5), of the coupling parasitic branch (301).
2. A compact antenna system for a handheld device according to claim 1, wherein the parasitic coupling stub (301) and the feeding coupling stub (302) are in a half-enclosed structure, and a capacitive coupling slot (6) is formed between the parasitic coupling stub (301) and the feeding coupling stub (302).
3. A compact antenna system for a handheld device according to claim 2, characterized in that the coupling feed stub (302) is an L-shaped structure, and a first radio frequency circuit (7) is arranged between the bottom of the coupling feed stub (302) and the dielectric substrate (1).
4. A compact antenna system for a handheld device according to claim 2, characterized in that the capacitive coupling slot (6) and the inside of the square slot (2) are provided with an insulating medium (8).
5. A compact antenna system for a handheld device according to claim 1, characterized in that a second radio frequency circuit (9) is arranged between the bottom of the second antenna (5) and the dielectric substrate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121288154.7U CN214797705U (en) | 2021-06-09 | 2021-06-09 | Compact antenna system for handheld device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121288154.7U CN214797705U (en) | 2021-06-09 | 2021-06-09 | Compact antenna system for handheld device |
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| Publication Number | Publication Date |
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| CN214797705U true CN214797705U (en) | 2021-11-19 |
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| CN202121288154.7U Active CN214797705U (en) | 2021-06-09 | 2021-06-09 | Compact antenna system for handheld device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023142463A1 (en) * | 2022-01-25 | 2023-08-03 | 华为技术有限公司 | Feed antenna and electronic device |
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2021
- 2021-06-09 CN CN202121288154.7U patent/CN214797705U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023142463A1 (en) * | 2022-01-25 | 2023-08-03 | 华为技术有限公司 | Feed antenna and electronic device |
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