CN113054423B - Antenna assembly - Google Patents
Antenna assembly Download PDFInfo
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- CN113054423B CN113054423B CN202110280871.3A CN202110280871A CN113054423B CN 113054423 B CN113054423 B CN 113054423B CN 202110280871 A CN202110280871 A CN 202110280871A CN 113054423 B CN113054423 B CN 113054423B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
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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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Abstract
The embodiment of the application provides an antenna module, including casing and base, a accommodation space is injectd jointly with casing looks adaptation and with the casing to base shape, and the FM antenna sets up in the casing depressed part, and GPS active antenna, first MIMO antenna printed board, second MIMO antenna printed board, first wiFi antenna and second wiFi antenna set up in the accommodation space. The antenna can be increased in number under the limitation of the same environment size, and coupling among the antennas can not be increased under the condition that the distance between the antennas is reduced.
Description
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to an antenna assembly.
Background
In order to meet the demand of faster and faster communication rate, multiple antennas are required to be configured at the transmitting and receiving ends to form an MIMO system, so as to reduce the error rate and improve the channel capacity, however, under the limit of the same environment size, the increase of the number of antennas inevitably requires the reduction of the size and the spacing of the antennas, and the coupling of the antennas increases with the decrease of the spacing, which seriously affects the communication quality.
At present, the number of built-in antennas of a multi-unit MIMO shark fin antenna is small, so that the distance between internal antennas can be pulled apart, mutual coupling among the antennas is reduced in a space diversity mode, or the number of antennas in the same frequency band is reduced, the frequency bands of the antennas are not overlapped, the purpose of frequency diversity is achieved, and the mutual coupling among the antennas is reduced, but the frequency bands of the MIMO antennas can be incompletely covered, the continuous requirements of a sub-6G internal private network and a public network on the use frequency bands are difficult to meet, and the isolation among the MIMO antennas cannot meet the requirement of more than 15dB of a full frequency band.
Disclosure of Invention
To solve the above-described problems in the background art, embodiments of the present application provide an antenna assembly.
An embodiment of the present application provides an antenna assembly, including: a housing having a front portion with a tip and a middle portion gradually increasing as it goes to the rear portion, the rear portion having a concave shape; the base is matched with the shell in shape and defines an accommodating space together with the shell; the FM antenna is arranged at the concave part of the shell; the GPS active antenna, the first MIMO antenna printed board, the second MIMO antenna printed board, the first WiFi antenna and the second WiFi antenna are positioned in the accommodating space; wherein the GPS active antenna is disposed proximate the front of the housing; the first MIMO antenna printed board and the second MIMO antenna printed board are approximately positioned in the middle of the accommodating space and are arranged oppositely; the first WiFi antenna is positioned on one side of the first MIMO antenna printed board far away from the second MIMO antenna printed board and is approximately positioned in the middle of the first MIMO antenna printed board; the second WiFi antenna is positioned on one side, far away from the first MIMO antenna printed board, of the second MIMO antenna printed board and is approximately positioned in the middle of the second MIMO antenna printed board.
In a possible implementation manner, the base is a hollow structure, and the cable of the FM antenna, the cable of the GPS active antenna, the cable of the first MIMO antenna printed board, the cable of the second MIMO antenna printed board, the cable of the first WiFi antenna, and the cable of the second WiFi antenna are all disposed in the hollow structure.
In one possible implementation manner, the surface of the first MIMO antenna printed board is printed with a first MIMO antenna and a third MIMO antenna which are opposite; a second MIMO antenna and a fourth MIMO antenna which are opposite to each other are printed on the surface of the second MIMO antenna printed board; the first MIMO antenna is the same as the fourth MIMO antenna and is arranged opposite to the second MIMO antenna, and the third MIMO antenna is the same as the second MIMO antenna and is arranged opposite to the fourth MIMO antenna.
In one possible implementation, the first MIMO antenna and/or the fourth MIMO antenna are configured to cover a 0.698GHz-0.96GHz band and a 1.71GHz-6GHz band; the second MIMO antenna and/or the third MIMO antenna are configured to cover a frequency band of 1.71GHz-6 GHz.
In one possible implementation, the first MIMO antenna comprises a high frequency part and a low frequency part, the high frequency part being configured to face the third MIMO antenna direction and to be substantially 50 ° different from the base surface; the low-frequency part comprises a first low-frequency branch line and a second low-frequency branch line, wherein the first low-frequency branch line is provided with a first low-frequency coupling line, and the second low-frequency branch line is provided with a second low-frequency coupling line; the third MIMO antenna extends along the upward direction of the base, inclines approximately 13 degrees towards the direction far away from the first MIMO antenna and is provided with a grounding short-circuit branch.
In one possible implementation, the high frequency part of the first MIMO antenna has an L-shaped groove, a square-shaped groove, a semicircular-shaped groove, and a meander line; the third MIMO antenna has a shaped slot.
In one possible implementation, the first WiFi antenna and the second WiFi antenna are configured to have different surface current distributions; the first WiFi antenna and/or the second WiFi antenna are/is configured to cover a 2.4GHz/5.8GHz frequency band.
In one possible implementation, the first WiFi antenna is located between the first MIMO antenna and the third MIMO antenna; the second WiFi antenna is located between the second MIMO antenna and the fourth MIMO antenna.
In a possible implementation manner, a connection pin is disposed on the base, and the FM antenna penetrates through the housing to be connected with the connection pin.
In a possible implementation manner, the first MIMO antenna printed board and the second MIMO antenna printed board each have a plurality of fixing lines thereon for connecting with the base.
In the antenna assembly provided by the embodiment of the application, the casing is arranged to be sharp at the front part, the middle part of the casing gradually increases along with the trend of the rear part, and the rear part of the casing is in a concave shape, the FM antenna is arranged at the concave part of the casing, the GPS active antenna is arranged close to the front part of the casing, the first MIMO antenna printed board and the second MIMO antenna printed board are approximately arranged in the middle of the accommodating space and are oppositely arranged, the first WiFi antenna is arranged on one side of the first MIMO antenna printed board far away from the second MIMO antenna printed board and approximately positioned in the middle of the first MIMO antenna printed board, the second WiFi antenna is arranged on one side of the second MIMO antenna printed board far away from the first MIMO antenna printed board and approximately positioned in the middle of the second MIMO antenna printed board, and therefore the number of the antennas can be increased under the limitation of the same environmental size.
It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present application will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
fig. 1 shows an exploded view of an antenna assembly according to an embodiment of the present application.
Fig. 2, 3, and 4 show schematic views of the installation of various antennas at different angles according to embodiments of the present application.
Fig. 5 shows a schematic layout of cables according to an embodiment of the application.
Fig. 6 and 7 respectively show a schematic diagram of a first MIMO antenna printed board and a schematic diagram of a second MIMO antenna printed board according to an embodiment of the present application.
Fig. 8 shows a schematic diagram of radiation directions of a first MIMO antenna and a second MIMO antenna according to an embodiment of the present application.
Wherein the content of the first and second substances,
10. a housing;
20. a base; 21. an aluminum base; 22. printing a board; 23. a first conductive adhesive tape; 231. an external thread fixing column; 232. an open flat pad; 233. a nut; 24. a second conductive adhesive tape; 25. a connecting needle;
31. an FM antenna; 32. a transfer seat;
41. a first MIMO antenna printed board; 42. a second MIMO antenna printed board; 43. a GPS active antenna; 431. a GPS active circuit; 44. a first WiFi antenna; 45. a second WiFi antenna;
51. a Peek female threaded rod; 52. PPE screws; 53. fixing the wire;
61. a first MIMO antenna; 611. a first low frequency branch line; 612. a second low frequency branch line; 613. a first low frequency coupled line; 614. a second low frequency coupled line; 62. a second MIMO antenna; 63. a third MIMO antenna; 631. a ground short circuit branch; 64. a fourth MIMO antenna;
71. an L-shaped slot; 72. a square groove; 73. a semicircular groove; 74. a curved line; 75. a special-shaped groove;
80. SMA-J cable assemblies.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings in the embodiments of the present application.
In order to meet the demand of faster and faster communication rate, multiple antennas are required to be configured at the transmitting and receiving ends to form an MIMO system, so as to reduce the error rate and improve the channel capacity, however, under the limit of the same environment size, the increase of the number of antennas inevitably requires the reduction of the size and the spacing of the antennas, and the coupling of the antennas increases with the decrease of the spacing, which seriously affects the communication quality.
At present, the number of built-in antennas of a multi-unit MIMO shark fin antenna is small, so that the distance between internal antennas can be pulled apart, mutual coupling among the antennas is reduced in a space diversity mode, or the number of antennas in the same frequency band is reduced, the frequency bands of the antennas are not overlapped, the purpose of frequency diversity is achieved, and the mutual coupling among the antennas is reduced, but the frequency bands of the MIMO antennas can be incompletely covered, the continuous requirements of a sub-6G internal private network and a public network on the use frequency bands are difficult to meet, and the isolation among the MIMO antennas cannot meet the requirement of more than 15dB of a full frequency band. Accordingly, the present application provides an antenna assembly to solve the above problems.
Fig. 1 shows an exploded view of an antenna assembly according to an embodiment of the present application, and fig. 2, 3 and 4 show schematic views of the installation of various antennas at different angles according to an embodiment of the present application.
In order to increase the number of antennas without causing an increase in coupling between antennas in the case where the pitch of the antennas is reduced under the restriction of the same environmental size, the above-described object can be achieved by setting the shape of the antenna case and the distribution of the antennas. As shown in the drawings, the antenna assembly includes a housing 10 and a base 20, the housing 10 is configured in a shark fin shape having a front part sharp, a middle part gradually increasing toward the rear part, and a rear part having a concavity, the base 20 is shaped to fit the housing 10, and the housing 10 and the base 20 together define a housing space to dispose various antennas in/outside the housing space.
An FM antenna 31 may be provided outside the accommodation space. Illustratively, the FM antenna 31 is disposed at a recess of the housing 10. In one possible implementation, the FM antenna 31 may be a vertically polarized glue stick antenna with a coverage frequency of 88MHz to 108 MHz. In a possible implementation, an adapter 32 may be disposed in a recess of the housing 10, a connection pin 25 may be disposed at a corresponding position on the upper surface of the base 20, the adapter 32 and the connection pin 25 are electrically connected, and the FM antenna 31 may be mounted on the adapter 32. In one possible embodiment, a through-hole is provided in a recess of the housing 10, through which the FM antenna 31 is directly connected to the connection pin 25.
In the accommodation space defined by the casing 10 and the base 20 together, a GPS active antenna 43, a first MIMO antenna printed board 41, a second MIMO antenna printed board 42, a first WiFi antenna 44, and a second WiFi antenna 45 may be provided, in order to conform to the shark fin shape of the casing 10, the GPS active antenna 43 is disposed near the front of the casing 10, the first MIMO antenna printed board 41 and the second MIMO antenna printed board 42 are disposed opposite to each other and substantially in the middle of the accommodation space, the first WiFi antenna 44 is disposed on a side of the first MIMO antenna printed board 41 away from the second MIMO antenna printed board 42 and substantially in the middle of the first MIMO antenna printed board 41, and the second WiFi antenna 45 is disposed on a side of the second MIMO antenna printed board 42 away from the first MIMO antenna printed board 41 and substantially in the middle of the second MIMO antenna printed board 42.
Therefore, by such an arrangement, the antennas can conform to the shape of the accommodating space, so that various antennas are reasonably distributed in the accommodating space to avoid mutual coupling, and how to avoid the mutual coupling of the antennas will be described below.
In one possible embodiment, the GPS active antenna 43 is bolted to the upper surface of the base 20, and further, to better save space, the GPS active antenna 43 may be laid flat on the upper surface of the base 20 and bolted thereto.
In one possible embodiment, one or more Peek female screw rods 51 are provided between the first MIMO antenna printed board 41 and the second MIMO antenna printed board 42 to fix and support the first MIMO antenna printed board 41 and the second MIMO antenna printed board 42, and then the first MIMO antenna printed board 41 and the second MIMO antenna printed board 42 are fixed using PPE screws 52 so that the first MIMO antenna printed board 41 and the second MIMO antenna printed board 42 can be relatively disposed without relative movement.
Further, the bottom of the first MIMO antenna printed board 41 has a plurality of fixing lines 53 for connection with the base 20, the bottom of the second MIMO antenna printed board 42 also has a plurality of fixing lines 53 for connection with the base 20, and the first MIMO antenna printed board 41 and the second MIMO antenna printed board 42 may be soldered to the upper surface of the base through the fixing lines 53, so that the first MIMO antenna printed board 41 and the second MIMO antenna printed board 42 can be prevented from relatively sliding on the upper surface of the base 20.
Illustratively, the first MIMO antenna printed board 41 has three fixed lines 53 thereon, one fixed line 53 being located at the front of the first MIMO antenna printed board 41, the other fixed line 53 being located at the middle of the first MIMO antenna printed board 41, and the last fixed line 53 being located at the rear of the first MIMO antenna printed board 41, and the first MIMO antenna printed board 41 can be firmly fixed to the upper surface of the base 20 by soldering the front, middle and rear of the first MIMO antenna printed board 41 to the upper surface of the base 20, respectively. It should be noted that the distribution of the fixed lines 53 on the second MIMO antenna printed board 42 is the same as that of the first MIMO antenna printed board 41, and the description thereof is omitted.
In a possible implementation, the first WiFi antenna 44 and the second WiFi antenna 45 may be vertically disposed on the base 20, so that the first WiFi antenna 44 and the second WiFi antenna 45 are both parallel to the first MIMO antenna printed board 41 or the second MIMO antenna printed board 42, thereby achieving the purpose of saving space.
Because the antenna has the cable, there can be the electric current in the antenna in the use, and the magnetic field that the electric current produced can cause certain influence to the radiation of antenna, for avoiding this kind of condition, need separate antenna's cable and antenna, in a possible implementation, can select aluminium material to separate antenna and its cable.
In one possible embodiment, the base 20 may be made of aluminum, and the base 20 is configured as a hollow structure, the antenna is disposed on the upper surface of the base 20, and the cable of the antenna is disposed in the hollow structure defined by the base 20, so that the influence of the cable of the antenna on the base can be reduced or avoided. Illustratively, the base 20 may be formed by an aluminum base 21 and a printed board 22, an open cavity is milled on the aluminum base 21, the printed board 22 is covered in the cavity, the aluminum base 21 and the printed board 22 jointly define a hollow structure, and the cables of the antennas are all arranged in the hollow structure jointly defined by the aluminum base 21 and the printed board 22, so that interference of the cables of the antennas on the antennas can be reduced. In a possible embodiment, the housing 10 is fixedly connected to the aluminum base 21, and a first sealing rubber strip 23 may be provided at the connection point, so as to seal the accommodating space jointly defined by the housing 10 and the base 20. In a possible implementation, the antenna assembly provided by the embodiment of the present application may be disposed on a train, and specifically may be connected to the train through the aluminum base 21, and a second sealing rubber strip 24 may be disposed at a connection point of the aluminum base and the train.
Referring to fig. 5, the GPS active antenna 43 generally includes a GPS active circuit 431, and the GPS active circuit 431 is disposed on the bottom surface of the top plate, so that cables connected to the GPS active circuit 431, cables connected to the FM antenna 31 of the connection pin 25, cables of the first MIMO antenna printed board 41, cables of the second MIMO antenna printed board 42, cables of the first WiFi antenna 44, and cables of the second WiFi antenna 45 may be distributed on the bottom surface of the printed board 22, and thus, due to the influence of the aluminum base, the influence of the cables of the antennas on the printed board can be reduced or avoided.
Further, the above-mentioned cables may be concentrated at a substantially central position of the bottom surface of the printed board 22, and a hole is formed at a corresponding position of the aluminum base 21, through which all the cables are led out, thereby facilitating the connection of the cables of each antenna to the corresponding device.
Further, in order to fix the cables led out from the hole, an external thread fixing post 231 is provided at the hole, all the cables pass through the external thread fixing post 231, and the external thread fixing post 231 is fixed by an opening flat pad 232 and a nut 233. Of course, the fixing manner of the cable may be any other manner, and it is only necessary to ensure that the cable can be fixed and can be led out from the opening of the aluminum base 21.
In one possible embodiment, an SMA-J cable assembly 80 is provided at the end of each cable exit base 20 to facilitate connection to the respective device.
How the antennas are arranged inside/outside the accommodating space in the above-described manner to avoid the coupling phenomenon between each other will be described in detail with reference to specific embodiments.
Fig. 6 and 7 are schematic views showing a first MIMO antenna printed board 41 and a second MIMO antenna printed board 42 according to an embodiment of the present application, respectively.
As shown in the drawing, a surface of the first MIMO antenna printed board 41 is printed with first and third MIMO antennas 61 and 63 facing each other, and a surface of the second MIMO antenna printed board 42 is printed with second and fourth MIMO antennas 62 and 64 facing each other.
The first MIMO antenna 61 is the same as the fourth MIMO antenna 64 and is disposed opposite to the second MIMO antenna 62, and the third MIMO antenna 63 is the same as the second MIMO antenna 62 and is disposed opposite to the fourth MIMO antenna 64.
The first MIMO antenna 61 and/or the fourth MIMO antenna 64 are configured to cover the 0.698GHz-0.96GHz band and the 1.71GHz-6GHz band. Since the first MIMO antenna 61 and the fourth MIMO antenna 64 are the same, only the first MIMO antenna 61 will be described as an example.
Referring also to fig. 8, the first MIMO antenna 61 includes a high frequency part and a low frequency part, the high frequency part is configured to be disposed toward the third MIMO antenna 63 and is different from the upper surface of the base 20 by approximately 50 °, the low frequency part includes a first low frequency branch line 611 perpendicular to the upper surface of the base 20 and a second low frequency branch line 612 parallel to the upper surface of the base 20, the first low frequency branch line 611 has a first low frequency coupling line 613 thereon, and the second low frequency branch line 612 has a second low frequency coupling line 614 thereon.
The third MIMO antenna 63 and/or the second MIMO antenna 62 are configured to cover the 1.71GHz to 6GHz band. Since the third MIMO antenna 63 is the same as the second MIMO antenna 62, only the third MIMO antenna 63 will be described as an example. The third MIMO antenna 63 is configured to extend in the upward direction of the base 20 and to be inclined by approximately 13 ° toward the direction away from the first MIMO antenna 61, and the third MIMO antenna 63 has a ground shorting stub 631. It can be seen that the radiation energy of the third MIMO antenna 63 is mainly concentrated in the range of 0-180 ° on the right side in fig. 6, and meanwhile, due to the existence of the ground short-circuit branch 631, the resonance point can be adjusted to be close to 1.71GHz while ensuring dc grounding, so that part of the low-frequency radiation is generated by the ground short-circuit branch 631, and part of the low-frequency radiation is generated by the semicircle of the third MIMO antenna 63 in fig. 8, thus, although the distance between the ground short-circuit branch 631 and the first MIMO antenna 61 is short, the electric field direction of the radiation part and the electric field direction of the radiation part of the first MIMO antenna 61 have a certain angle, and the purpose of polarization diversity can be achieved. In addition, the high-frequency part of the first MIMO antenna 61 and the third MIMO antenna 63 have different surface current distribution and radiation electric fields in the frequency band of 1.71GHz-6GHz, so that mutual interference is greatly reduced.
Further, the first MIMO antenna printed board 41 and the second MIMO antenna printed board 42 are arranged oppositely, so that the first MIMO antenna 61 and the second MIMO antenna 62 are arranged oppositely, and the third MIMO antenna 63 and the fourth MIMO antenna 64 are arranged oppositely. With this arrangement, the first MIMO antenna 61 and the fourth MIMO antenna 64 intersect at approximately 75 ° and approach 90 ° polarization for the high-frequency band 1.71GHz to 6GHz, and mutual coupling can be reduced.
Taking the first MIMO antenna 61 as an example, the meander line 74 and the L-shaped slot 71 in the high frequency part of the first MIMO antenna 61 can increase the surface current path thereof and improve the antenna matching, and the first low frequency branch line 611 and the second low frequency branch line 612 in the low frequency part of the first MIMO antenna 61, the first low frequency coupling line 613 in the first low frequency branch line 611, and the second low frequency coupling line 614 in the second low frequency branch line 612 can improve the current distribution in the surface thereof and can couple with the high frequency part, thereby extending the overall bandwidth. Further, the first low-frequency branch line 611 and the second low-frequency branch line 612 of the first MIMO antenna 61 are disposed apart from the two low-frequency branch lines of the fourth MIMO antenna 64, so that a space diversity effect can be achieved, and coupling can be further reduced.
In a possible embodiment, the above-mentioned facing arrangement of the first MIMO antenna printed board 41 and the second MIMO antenna printed board 42 may result in the facing arrangement of the first MIMO antenna 61 and the second MIMO antenna 62, thereby resulting in a higher coincidence degree of the first MIMO antenna 61 and the second MIMO antenna 62. In order to reduce the overlapping portion as much as possible, the first MIMO antenna 61 may be provided with the square groove 72 and the semicircular groove 73, the second MIMO antenna 62 may be provided with the irregular groove 75 at a substantially central position, and the second MIMO antenna 62 may be designed using an E-plane symmetric cut-out, so that the actual overlapping area of the first MIMO antenna 61 and the second MIMO antenna 62 may be reduced as much as possible. Although the radiation electric field directions of the low-frequency part of the first MIMO antenna 61 and the high-frequency part of the second MIMO antenna 62 are approximately consistent, the first MIMO antenna 61 and the second MIMO antenna 62 have high isolation due to the different frequencies, and the main radiation area of the second MIMO antenna 62 is 180-360 degrees in FIG. 8, namely, the third MIMO antenna 63 forms a pattern complementary to form an omnidirectional pattern to form MIMO pattern diversity, moreover, the radiation direction of the high-frequency part of the first MIMO antenna 61 faces to the upper right in FIG. 8, and the radiation direction of the second MIMO antenna 62 faces to the left in FIG. 8, so that the first MIMO antenna 61 and the second MIMO antenna 62 have the effect of polarization isolation in the high-frequency part.
In a possible implementation manner, the first WiFi antenna 44 and the second WiFi antenna 45 are configured to have different surface current distributions, so that the radiation electric fields of the first WiFi antenna 44 and the second WiFi antenna 45 are different, and further, the isolation of the MIMO antennas is improved, and since the first WiFi antenna 44 is disposed between the first MIMO antenna 61 and the third MIMO antenna 63, and the second WiFi antenna 45 is disposed between the second MIMO antenna 62 and the fourth MIMO antenna 64, there is no overlap between the areas of the two antennas and the broadband MIMO antenna, so that mutual interference can be reduced.
In one possible implementation, the first WiFi antenna 44 and/or the second WiFi antenna 45 are configured to cover the 2.4GHz/5.8GHz band.
In summary, firstly, two 75 ° dual-polarized broadband antennas, namely, a first MIMO antenna printed board 41 and a second MIMO antenna printed board 42, are designed according to the streamline shape of the housing 10, the broadband antennas cover 0.698GHz-0.96GHz and 1.71GHz-6GHz, and the high frequency band is relatively arranged by adopting a polarization diversity method, so that the isolation of the frequency band is improved, the 0.698GHz-0.96GHz frequency band firstly adopts a grounding branch to cover 0.8GHz-0.9GHz, then the grounding branch extension branch is coupled with the main branch, the bandwidth of the extension frequency band is 0.698GHz-0.96GHz, and in the radiation process, an electromagnetic field radiated by surface current passing through the low frequency band is far away from the corresponding MIMO antenna, similar to a space diversity effect, so that the isolation is further improved, and the influence of mutual coupling on standing wave radiation is reduced.
Then, a third MIMO antenna 63 covering a frequency band of 1.71GHz-6GHz is designed according to the streamline shape of the shell 10, the design is carried out in two modes of directional diagram diversity and polarization diversity, the E-plane symmetry cutting method is adopted, the size of the antenna is greatly reduced, the overlap ratio of the third MIMO antenna 63 and the fourth MIMO antenna 64 is reduced, the third MIMO antenna 63 adopts the polarization diversity and is approximately in cross polarization with the fourth MIMO antenna 64, the mutual coupling among the antennas is reduced, the surface current distribution of the antennas is interfered through hole digging and grounding processing, and the isolation degree of the antennas is improved.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the application referred to in the present application is not limited to the embodiments with a particular combination of the above-mentioned features, but also encompasses other embodiments with any combination of the above-mentioned features or their equivalents without departing from the spirit of the application. For example, the above features may be replaced with (but not limited to) features having similar functions as those described in this application.
Claims (8)
1. An antenna assembly, comprising:
a housing having a front portion with a tip and a middle portion gradually increasing as it goes to the rear portion, the rear portion having a concave shape;
the base is matched with the shell in shape and defines an accommodating space together with the shell;
the FM antenna is arranged at the concave part of the shell;
the GPS active antenna, the first MIMO antenna printed board, the second MIMO antenna printed board, the first WiFi antenna and the second WiFi antenna are positioned in the accommodating space;
wherein the content of the first and second substances,
the GPS active antenna is arranged close to the front part of the shell;
the first MIMO antenna printed board and the second MIMO antenna printed board are approximately positioned in the middle of the accommodating space and are arranged oppositely;
the first WiFi antenna is positioned on one side of the first MIMO antenna printed board far away from the second MIMO antenna printed board and is approximately positioned in the middle of the first MIMO antenna printed board;
the second WiFi antenna is positioned on one side of the second MIMO antenna printed board far away from the first MIMO antenna printed board and is approximately positioned in the middle of the second MIMO antenna printed board;
the surface of the first MIMO antenna printed board is printed with a first MIMO antenna and a third MIMO antenna which are opposite;
a second MIMO antenna and a fourth MIMO antenna which are opposite to each other are printed on the surface of the second MIMO antenna printed board;
wherein the content of the first and second substances,
the first MIMO antenna is the same as the fourth MIMO antenna and is arranged opposite to the second MIMO antenna, and the third MIMO antenna is the same as the second MIMO antenna and is arranged opposite to the fourth MIMO antenna;
the first MIMO antenna and/or the fourth MIMO antenna are configured to cover a frequency band of 0.698GHz-0.96GHz and a frequency band of 1.71GHz-6 GHz;
the second MIMO antenna and/or the third MIMO antenna are configured to cover a frequency band of 1.71GHz-6 GHz.
2. The antenna assembly of claim 1,
the base is hollow structure, the cable of FM antenna, the cable of GPS active antenna, the cable of first MIMO antenna printing board, the cable of second MIMO antenna printing board, the cable of first wiFi antenna and the cable of second wiFi antenna all set up in hollow structure.
3. The antenna assembly of claim 1,
the first MIMO antenna comprising a high frequency portion and a low frequency portion, the high frequency portion configured to be directed towards the third MIMO antenna and to be substantially 50 DEG different from the base surface; the low-frequency part comprises a first low-frequency branch line and a second low-frequency branch line, wherein the first low-frequency branch line is provided with a first low-frequency coupling line, and the second low-frequency branch line is provided with a second low-frequency coupling line;
the third MIMO antenna extends along the upward direction of the base, inclines approximately 13 degrees towards the direction far away from the first MIMO antenna and is provided with a grounding short-circuit branch.
4. The antenna assembly of claim 3,
the high-frequency part of the first MIMO antenna is provided with an L-shaped groove, a square groove, a semicircular groove and a curved line;
the third MIMO antenna has a shaped slot.
5. The antenna assembly of claim 1,
the first WiFi antenna and the second WiFi antenna are configured to have different surface current distributions;
the first WiFi antenna and/or the second WiFi antenna are/is configured to cover a 2.4GHz/5.8GHz frequency band.
6. The antenna assembly of claim 5,
the first WiFi antenna is located between the first MIMO antenna and the third MIMO antenna;
the second WiFi antenna is located between the second MIMO antenna and the fourth MIMO antenna.
7. The antenna assembly of claim 1,
the FM antenna is characterized in that a connecting needle is arranged on the base, and the FM antenna penetrates through the shell and is connected with the connecting needle.
8. The antenna assembly of claim 1,
the first MIMO antenna printed board and the second MIMO antenna printed board are both provided with a plurality of fixed lines used for being connected with the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110280871.3A CN113054423B (en) | 2021-03-16 | 2021-03-16 | Antenna assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110280871.3A CN113054423B (en) | 2021-03-16 | 2021-03-16 | Antenna assembly |
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| CN113054423A CN113054423A (en) | 2021-06-29 |
| CN113054423B true CN113054423B (en) | 2022-01-04 |
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| CN202110280871.3A Active CN113054423B (en) | 2021-03-16 | 2021-03-16 | Antenna assembly |
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| CN114050402B (en) * | 2021-11-11 | 2023-02-21 | 四川九洲电器集团有限责任公司 | Multifunctional composite antenna |
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| CN206250382U (en) * | 2016-11-04 | 2017-06-13 | 浙江金乙昌科技股份有限公司 | A kind of double vertical wing shark fins antennas |
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| CN113054423A (en) | 2021-06-29 |
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