CN216389717U - Antenna device and ZigBee module - Google Patents
Antenna device and ZigBee module Download PDFInfo
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- CN216389717U CN216389717U CN202122659847.9U CN202122659847U CN216389717U CN 216389717 U CN216389717 U CN 216389717U CN 202122659847 U CN202122659847 U CN 202122659847U CN 216389717 U CN216389717 U CN 216389717U
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Abstract
The application relates to an antenna device and a ZigBee module. The antenna device includes the feed and with feed electric connection's irradiator, the irradiator includes: the antenna comprises a first radiation part, a second radiation part and a third radiation part, wherein a gap is formed between one end of the second radiation part and one end of the first radiation part, the third radiation part is connected between the first radiation part and the second radiation part, and the position of the third radiation part corresponds to the position of the gap, wherein the third radiation part is provided with a bent radiation structure bent relative to the first radiation part or/and the second radiation part, and a feed source is connected to the third radiation part and is configured to feed a current signal to the radiation part so that the radiation part works in a specified frequency band. The ZigBee module comprises a radio frequency circuit, a feed source and the antenna device, wherein the radio frequency circuit is connected to the antenna device through the feed source. The structure can optimize the efficiency of the antenna device and meet the requirement of wireless transmission distance without increasing the size and the area of the antenna device.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to an antenna device and a ZigBee module.
Background
With the development of wireless communication technology, the ZigBee technology is widely accepted because of its characteristics of low power consumption, low cost, and low complexity. However, the wireless transmission distance of most of the antenna devices in the ZigBee modules is low at present, and the requirement of the wireless transmission distance cannot be met.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides an antenna device and a ZigBee module.
According to a first aspect of the present application, an embodiment of the present application provides an antenna apparatus, including a feed source and a radiator electrically connected to the feed source, where the radiator includes: the antenna comprises a first radiation part, a second radiation part and a third radiation part, wherein a gap is formed between one end of the second radiation part and one end of the first radiation part, the third radiation part is connected between the first radiation part and the second radiation part, and the position of the third radiation part corresponds to the position of the gap, wherein the third radiation part is provided with a bent radiation structure bent relative to the first radiation part or/and the second radiation part, and a feed source is connected to the third radiation part and is configured to feed a current signal to the radiation part so that the radiation part works in a specified frequency band.
In some embodiments, the first radiating portion and the second radiating portion are spaced apart in the first direction, and the third radiating portion extends in the first direction with respect to the gap.
In some embodiments, the third radiating portion includes a first extension portion connected to the first radiating portion and a second extension portion connected between the first extension portion and the second radiating portion; the first radiation part, the first extension part and the second extension part are sequentially arranged at intervals in a second direction, and the second direction is intersected with the first direction.
In some embodiments, the third radiating portion further includes a first connecting portion, a second connecting portion, and a third connecting portion, the first connecting portion is connected between the first radiating portion and the first extending portion, the second connecting portion is connected between the first extending portion and the second extending portion, and the third connecting portion is connected between the second extending portion and the second radiating portion; the first radiation part, the first extension part and the second extension part are arranged in parallel, and the second direction is perpendicular to the first direction.
In some embodiments, the antenna device is further provided with a feeding portion and a grounding portion; the feed portion is connected between the first connection portion and the feed source, and the grounding portion is connected to the third connection portion to ground the radiator.
In some embodiments, the first radiating portion includes a first flat portion disposed along the first direction and connected to the third radiating portion, and a first bent portion disposed along the second direction and connected to an end of the first flat portion away from the third radiating portion, where the second direction intersects the first direction.
In some embodiments, the second radiating portion includes a second flat portion and a second bending portion, the second flat portion is disposed along the first direction and connected to the third radiating portion, the second flat portion and the first flat portion are located on the same straight line and spaced apart from each other, the second bending portion is connected to an end of the second flat portion away from the third radiating portion, and the second bending portion is spaced apart from the first bending portion.
In some embodiments, the length dimension of the second straight portion in the first direction is less than the length dimension of the first straight portion in the first direction.
In some embodiments, the third radiating portion is located between the first bending portion and the second bending portion, and an extension dimension of the third radiating portion in the second direction is smaller than a dimension of the first bending portion in the second direction.
According to a second aspect of the present application, an embodiment of the present application provides a ZigBee module, including a radio frequency circuit, a feed source, and the above antenna device, the radio frequency circuit is connected to the antenna device through the feed source.
The antenna device that this application embodiment provided includes the feed and with feed electric connection's irradiator, the irradiator includes: the antenna device comprises a first radiation part, a second radiation part and a third radiation part, wherein a gap is formed between one end of the second radiation part and one end of the first radiation part, the third radiation part is connected between the first radiation part and the second radiation part, and the position of the third radiation part corresponds to the position of the gap, so that the coupling effect is achieved, and the bandwidth length of the antenna device is ensured. The third radiation part is provided with a bending radiation structure which is bent relative to the first radiation part or/and the second radiation part, so that the wiring length of the antenna device can be increased, and the coverage area of the wiring can be reduced. The feed source is connected to the third radiation part and configured to feed a current signal to the radiator so that the radiator operates in a specified frequency band. The ZigBee module comprises a radio frequency circuit, a feed source and the antenna device, wherein the radio frequency circuit is connected to the antenna device through the feed source. The structure can optimize the efficiency of the antenna device and meet the requirement of wireless transmission distance without increasing the size and the area of the antenna device.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings needed 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 application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 shows a schematic structural diagram of an antenna device provided in an embodiment of the present application.
Fig. 2 shows a schematic size diagram of the antenna arrangement shown in fig. 1.
Fig. 3 shows a structural block diagram of a ZigBee module provided in an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As used in this specification and the appended claims, certain terms are used to refer to particular components, and it will be appreciated by those skilled in the art that a manufacturer of hardware may refer to a component by different names. The specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to,"; "substantially" means that a person skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.
The present invention will be further described with reference to the following detailed description and accompanying drawings.
ZigBee is a low-power local area network protocol based on IEEE802.15.4 standard, has the characteristics of low power consumption, low cost, low complexity, strong anti-interference capability, large network capacity and the like, and can support various network topological structures such as a mesh network, a star network, a tree network and the like. ZigBee uses three different working frequency bands, namely 2.4GHz, 868MHz and 433MHz, wherein 2.4GHz is the mainstream working frequency band of ZigBee.
A Printed Circuit Board (PCB) carrier antenna has the advantages of simple structure, easy matching, low cost, and the like, and is widely applied to a wireless communication module. However, most of the PCB carrier antennas currently applied to the ZigBee wireless communication module are Planar Inverted-F antennas (PIFAs) or monopole antennas, and the radiation distance of the PIFA or monopole antennas is short in a frequency band of 2.4GHz, which is difficult to meet the requirement of the ZigBee module on infinite distance transmission of the Antenna in practical application.
In practical studies, the inventors of the present application have found that the physical size of the antenna device can be effectively reduced by adopting a bent wiring manner, but the performance such as the antenna radiation efficiency is also reduced. Therefore, the pitch and length of the wiring when the antenna is bent are important factors for achieving the performance of the dipole antenna.
Therefore, in view of the above problems, the inventors propose an antenna device and a ZigBee module in the embodiments of the present application.
Referring to fig. 1, an antenna device 100 is provided in the present embodiment. The antenna device 100 includes a feed 10 and a radiator 30 electrically connected to the feed 10. The radiator 30 includes a first radiation portion 310, a second radiation portion 330 and a third radiation portion 350, a gap 110 is formed between one end of the second radiation portion 330 and one end of the first radiation portion 310, the third radiation portion 350 is connected between the first radiation portion 310 and the second radiation portion 330, the position of the third radiation portion 350 corresponds to the position of the gap 110, and the third radiation portion 350 has a bent radiation structure bent relative to the first radiation portion 310 or/and the second radiation portion 330, which can increase the length of the trace of the antenna device 100 and reduce the coverage area of the trace. The feed 10 is connected to the third radiation part 350, and is configured to feed a current signal to the radiator 30 so that the radiator 30 operates in a designated frequency band. In the embodiment of the present application, the feed source 10 feeds a current signal to the radiator 30, so that the radiator 30 operates in a frequency band of 2.4 GHz.
In this application, the terms "mounted," "connected," "secured," and the like are to be construed broadly unless otherwise specifically stated or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through the inside of two members or they may be merely surface-contacting. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the embodiment of the present application, the first radiation portion 310 is substantially "L" shaped, and includes a first straight portion 311 and a first bending portion 313 connected to the first straight portion 311. The first straight portion 311 is substantially in the shape of a straight bar, and is disposed substantially along the first direction X. The first bending portion 313 is connected to an end of the first flat portion 311 away from the third radiating portion 350, and is bent relative to the first flat portion 311. Further, the first bending portion 313 is substantially in a shape of a strip, and is disposed substantially along the second direction Y. The first direction X intersects the second direction Y at an angle greater than or equal to 45 degrees, and in this embodiment, the first direction X and the second direction Y may be perpendicular to each other. In this embodiment, the first bending portion 313 is bent with respect to the first flat portion 311, so that the size and area of the antenna device 100 can be reduced.
Further, the second radiation portion 330 is substantially "L" shaped, and includes a second straight portion 331 and a second bending portion 333 connected to the second straight portion 331, where the second straight portion 331 is substantially in the form of a straight strip and is disposed substantially along the first direction X. The second bending portion 333 is connected to an end of the second flat portion 331 away from the third radiating portion 350, and is bent relative to the second flat portion 331. Further, the second bending portion 331 is substantially in a shape of a strip, and is disposed substantially along the second direction Y. In this embodiment, the second bending portion 333 is bent with respect to the second flat portion 331, so that the size and area of the antenna device 100 can be reduced. In the embodiment of the present application, the second straight portion 331 and the first straight portion 311 are substantially located on the same straight line, and the adjacent ends of the second straight portion 331 and the first straight portion 311 are spaced apart from each other, the second bent portion 333 is spaced apart from the first bent portion 311, and the length dimension of the second straight portion 331 in the first direction X may be smaller than the length dimension of the first straight portion 311 in the first direction X, so as to ensure the optimal bandwidth of the antenna device 100.
In the embodiment of the present application, the third radiation portion 350 has a bent radiation structure bent with respect to the first radiation portion 310 or/and the second radiation portion 330, and it should be understood that the bending with respect to the first radiation portion 310 or/and the second radiation portion 330 refers to: the third radiating portion 350 is not continuous with (but bent) the first radiating portion 310 or/and the second radiating portion 330 in the first direction, or the third radiating portion 350 is not juxtaposed with the gap 110 in the first direction, nor juxtaposed in the second direction, deviating from the position where the first radiating portion 310 or/and the second radiating portion 330 are located; further, bending the radiating structure should be understood as: the structure is not a straight structure, and has at least one bent corner, which can increase the length of the trace of the antenna device 100 and reduce the coverage area of the trace. The third radiation portion 350 is located between the first bending portion 311 and the second bending portion 313, and includes a first extension portion 351 and a second extension portion 353, the first extension portion 351 is connected to the first radiation portion 310, and the second extension portion 353 is connected between the first extension portion 351 and the second radiation portion 330. The first extension 351 and the second extension 353 are both substantially straight and strip-shaped, and are disposed substantially along the first direction X. The first radiating portion 310, the first extending portion 351 and the second extending portion 353 are sequentially disposed at intervals in the second direction Y, so that the first extending portion 351 and the second extending portion 353 generate a 2.4GHZ frequency band which is commonly used in daily life, thereby facilitating the use of the antenna device 100.
Further, the third radiation portion 350 further includes a first connection portion 355, a second connection portion 357, and a third connection portion 359, which are substantially bar-shaped and are disposed substantially along the second direction Y. The first connection portion 355 is connected between the first radiation portion 310 and the first extension portion 351, the second connection portion 357 is connected between the first extension portion 351 and the second extension portion 353, and the third connection portion 359 is connected between the second extension portion 353 and the second radiation portion 330. The extension of the third radiation portion 350 in the second direction Y is smaller than the extension of the first bending portion 313 in the second direction, and this structure can provide the antenna device 100 with a coupling effect.
The antenna device 100 further includes a feeding portion 370 and a grounding portion 390, in this embodiment, the feeding portion 370 may be disposed between the first connecting portion 355 and the feed 10, and is configured to be connected to the feed 10 for receiving the current signal of the radio frequency circuit 210. In some embodiments, the feed 10 may be connected to the feed 370 and configured to feed a current signal to the radiator 30 under the control of the radio frequency circuit 210 to operate the radiator 30 at a specified frequency band. In the embodiment of the present application, the radiator 30 operates in the frequency band of 2.4 GHz. The ground portion 390 may be disposed on the third connection portion 359, and is used for grounding the radiator 30 so that the antenna device 100 forms a loop.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Referring to fig. 2, in some embodiments, in order to ensure that the antenna device 100 can transmit and receive a 2.4GHz band, the shape and size of the radiator 30 may be as shown in fig. 2, wherein the radiator 30 may be substantially rectangular as a whole, and the size thereof may be limited as follows:
the total length a of the radiator 30 in the first direction X may have a range of values: 98.98-100.98 mm inclusive, for example, the total length A of the radiator 30 in the first direction X may be 100.00 mm. The first radiating portion 310 may be substantially "L" shaped, and a length L1 of the first straight portion 311 in the first direction X may have a range of values: between 50mm and 52mm inclusive, for example, the length L1 of the first straight portion 311 in the first direction X may be 50.800 mm; the length W1 of the first bent portion 313 in the second direction Y may take a range of: between 20mm and 22mm inclusive, for example, the length W1 of the first bent part 313 in the second direction Y may be 20.3310 mm.
The second radiating portion 330 may have a substantially "L" shape, and the length L2 of the second straight portion 331 in the first direction X may have a range of values: between 43mm and 45mm inclusive, for example, the length L2 of the second straight portion 331 in the first direction X may be 43.180 mm; the length W2 of the second bent portion 333 in the second direction X may take a range of: between 20mm and 22mm inclusive, for example, the length W2 of the second bent part 333 in the second direction X may be 20.3310 mm. The length B of the gap 110 between the first straight portion 311 and the second straight portion 331 in the first direction X may range from: between 5.00 and 7.00mm inclusive, for example, the length B of the gap 110 in the first direction X may be 6 mm.
The total length L3 of the third radiating portion 350 in the first direction X may have a range of values: between 32mm and 34mm inclusive, for example, the total length L3 of the third radiation part 350 in the second direction Y may be 33.020 mm; the total length C of the third radiation portion 350 in the second direction Y may have a range as follows: 13.7-20.3310 mm inclusive, for example, the total length C of the third radiating portion 350 in the second direction Y may be 15 mm.
Referring to table 1, in the antenna device 100 according to the above embodiment, the gains and efficiencies corresponding to different frequencies in practical tests are shown in table 1,
TABLE 1
From the test data in table 1, it can be known that the gain is between 1.99dB and 3.28dB and the radiation efficiency is between 60.02% and 64.96% in the 2400 GHz band and 2500GHz band. Therefore, the radiation efficiency of the antenna device 100 according to the embodiment of the present application is higher than 60% when receiving and transmitting 2.4GHz band, and the radiation efficiency is significantly higher.
Referring to table 2, in an actual test, the corresponding test distances of the antenna device 100 according to the above embodiment under different gateways and different test equipments are shown in table 4, wherein when the antenna device 100 is applied to different test equipments (e.g. smoke sensor, smart switch), it is used as a wireless communication unit of the test equipment.
TABLE 2
From the test data in table 2, it can be known that the test distance of the smoke sensor is about 170m, and the test distance of the intelligent switch is about 197 m. Therefore, the test distance of the antenna device of the embodiment of the application is higher than 170m when the antenna device receives and transmits the 2.4GHz frequency band, and the test distance is obviously longer.
Referring to fig. 3, an embodiment of the present application provides a ZigBee module 200. The ZigBee module 200 comprises a radio frequency circuit 210, a control circuit 230, and an antenna device 100, wherein the radio frequency circuit 210 may be connected to the antenna device 100 through a feed 210, in this embodiment, the radio frequency circuit 210 may be connected to a feed 370, and the radio frequency circuit 210 may be a high frequency circuit for generating a radio frequency signal. The control circuit 230 is connected to the rf circuit 210, and is used for controlling the rf circuit 210 to generate an rf signal.
In summary, the antenna device includes a feed source and a radiator electrically connected to the feed source, and the radiator includes: the antenna comprises a first radiation part, a second radiation part and a third radiation part, wherein a gap is formed between one end of the second radiation part and one end of the first radiation part, the third radiation part is connected between the first radiation part and the second radiation part, and the position of the third radiation part corresponds to the position of the gap, wherein the third radiation part is provided with a bent radiation structure bent relative to the first radiation part or/and the second radiation part, and a feed source is connected to the third radiation part and is configured to feed a current signal to the radiation part so that the radiation part works in a specified frequency band. The ZigBee module comprises a radio frequency circuit, a feed source and the antenna device, wherein the radio frequency circuit is connected to the antenna device through the feed source. The structure can optimize the efficiency of the antenna device and meet the requirement of wireless transmission distance without increasing the size and the area of the antenna device.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. An antenna device, comprising a feed source and a radiator electrically connected to the feed source, wherein the radiator comprises:
a first radiation section;
a second radiation part having a gap formed between one end thereof and one end of the first radiation part; and
a third radiation part connected between the first radiation part and the second radiation part, the position of the third radiation part corresponding to the position of the gap, wherein the third radiation part has a bent radiation structure bent relative to the first radiation part or/and the second radiation part; the feed source is connected to the third radiation part and configured to feed a current signal to the radiator so that the radiator operates in a specified frequency band.
2. The antenna device according to claim 1, wherein the first radiation portion and the second radiation portion are provided at an interval in a first direction, and the third radiation portion extends in the first direction with respect to the gap.
3. The antenna device according to claim 2, wherein the third radiating portion includes a first extension portion connected to the first radiating portion and a second extension portion connected between the first extension portion and the second radiating portion; the first radiation part, the first extension part and the second extension part are sequentially arranged at intervals in a second direction, and the second direction is intersected with the first direction.
4. The antenna device according to claim 3, wherein the third radiation portion further includes a first connection portion, a second connection portion, and a third connection portion, the first connection portion being connected between the first radiation portion and the first extension portion, the second connection portion being connected between the first extension portion and the second extension portion, the third connection portion being connected between the second extension portion and the second radiation portion;
the first radiating portion, the first extending portion and the second extending portion are arranged in parallel, and the second direction is perpendicular to the first direction.
5. The antenna device according to claim 4, wherein the antenna device is further provided with a feeding portion and a grounding portion; the feed portion is connected between the first connection portion and the feed source, and the ground portion is connected to the third connection portion to ground the radiator.
6. The antenna device according to claim 1, wherein the first radiating portion includes a first straight portion and a first bent portion, the first straight portion is disposed along a first direction and connected to the third radiating portion, the first bent portion is disposed along a second direction and connected to an end of the first straight portion away from the third radiating portion, and the second direction intersects with the first direction.
7. The antenna device according to claim 6, wherein the second radiating portion includes a second straight portion and a second bent portion, the second straight portion is disposed along the first direction and connected to the third radiating portion, the second straight portion and the first straight portion are located on the same straight line and spaced apart from each other, the second bent portion is connected to an end of the second straight portion away from the third radiating portion, and the second bent portion and the first bent portion are spaced apart from each other.
8. The antenna device according to claim 7, wherein a length dimension of the second straight portion in the first direction is smaller than a length dimension of the first straight portion in the first direction.
9. The antenna device according to claim 7, wherein the third radiation portion is located between the first bending portion and the second bending portion, and an extension dimension of the third radiation portion in the second direction is smaller than a dimension of the first bending portion in the second direction.
10. A ZigBee module comprising a radio frequency circuit and an antenna device as claimed in any one of claims 1 to 9, the radio frequency circuit being connected to the antenna device via the feed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122659847.9U CN216389717U (en) | 2021-11-02 | 2021-11-02 | Antenna device and ZigBee module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122659847.9U CN216389717U (en) | 2021-11-02 | 2021-11-02 | Antenna device and ZigBee module |
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| CN216389717U true CN216389717U (en) | 2022-04-26 |
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