CN215497077U

CN215497077U - Cat.1 terminal antenna structure

Info

Publication number: CN215497077U
Application number: CN202121507124.0U
Authority: CN
Inventors: 任锐
Original assignee: Shanghai Hemiaochuangxian Intelligent Technology Co ltd
Current assignee: Shanghai Hemiaochuangxian Intelligent Technology Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2022-01-11
Anticipated expiration: 2031-07-02

Abstract

The utility model discloses a Cat.1 terminal antenna structure which comprises a first main board and a second main board, wherein a Cat.1 antenna trunk part is connected to the first main board, the Cat.1 antenna trunk part comprises a first grounding end, and the second main board is connected with the first grounding end. According to the utility model, the first grounding end of the main part of the Cat.1 antenna is connected with the second main board, so that equivalent fusion and unification of the main part of the Cat.15 antenna, the first main board and the second main board are realized, and passive interference caused by parasitic clutter of the second main board is eliminated.

Description

Cat.1 terminal antenna structure

Technical Field

The utility model belongs to the technical field of the antenna design and specifically relates to a Cat.1 terminal antenna structure.

Background

Under the promotion of the evolution trend of the global mobile internet technology standard and the industry pattern, various advantages of Cat.1 gradually appear. Not only the maturity and the integration of Cat.1 chip and module are higher, and the hardware architecture of module is also simpler, peripheral hardware cost is lower, can also form the scale effect in the short time. In addition, with the accelerated network quit of 2G/3G, three operators in China also begin to actively guide industrial users to use Cat.1 terminal modules. The overall antenna environment of the IOT project is good, but the Cat.1 single receiver scheme cannot use an LMMSE-IRC-type receiver to perform same frequency interference suppression as the conventional LTE UE due to the lack of diversity antennas. Meanwhile, the IOT is mostly applied to the aspects of video, voice, positioning, identification and the like, the equipment is very large in size such as a camera, a loudspeaker and the like due to cost reasons, PFC or connecting wires of the camera and the loudspeaker are very long, and interference on antenna receiving caused by a screen FPC, a TP IC and the like is very large, so that the main bottleneck of antenna design and debugging of the current Cat.1 terminal is not the antenna efficiency, but the interference is solved.

Thus, there is a need for improvements and enhancements in the art.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to provide a cat.1 terminal antenna structure, aiming at solving the problem of passive interference in a cat.1 terminal antenna in the prior art, aiming at overcoming the above defects in the prior art.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

in a first aspect, the present invention provides a cat.1 terminal antenna structure, which includes a first main board and a second main board, wherein the first main board is connected to a cat.1 antenna trunk portion, the cat.1 antenna trunk portion includes a first ground terminal, and the second main board is connected to the first ground terminal.

In one implementation manner, the first grounding end is extended with an FPC copper sheet, and one end of the FPC copper sheet, which is far away from the first grounding end, is connected to a coupling area on the second main board.

In one implementation, the coupling region includes a copper exposed portion and a copper unexposed portion, when the FPC copper sheet is connected to the copper exposed portion, the cat.1 antenna main portion is connected to the coupling region in a ground connection, and when the FPC copper sheet is connected to the copper unexposed portion, the cat.1 antenna main portion is coupled to the coupling region in a feed-to-ground manner.

In one implementation manner, a conductive member is connected to the first grounding end, and one end of the conductive member, which is far away from the first grounding end, is connected to the copper exposing portion of the coupling region.

In one implementation, the first main board and the second main board are connected through an FPC connector.

In one implementation, the cat.1 antenna main portion further includes a second ground terminal, and the second ground terminal is connected to the first main board.

In one implementation, a first housing is disposed on the first main board, a second housing is disposed on the second main board, and the first housing and the second housing are connected to each other.

In one implementation, the second housing is provided with a lamp panel near the second main board.

In one implementation manner, an opening for placing the second main board is formed in the second housing, and a transparent plate for sealing the opening is arranged on the second housing.

Has the advantages that: compared with the prior art, the Cat.1 terminal antenna structure comprises a first main board and a second main board, wherein the first main board is connected with a Cat.1 antenna trunk part, the Cat.1 antenna trunk part comprises a first grounding end, and the second main board is connected with the first grounding end. Because the first grounding end of the main part of the Cat.1 antenna is connected with the second mainboard, the second mainboard directly becomes a part of the reference ground of the main part of the Cat.1 antenna, equivalent fusion and unification of the main part of the Cat.1 antenna, the first mainboard and the second mainboard are realized, and passive interference caused by parasitic clutter of the second mainboard can be eliminated.

Drawings

Fig. 1 is a schematic structural diagram of a cat.1 terminal antenna structure provided in the present invention.

Fig. 2 is a schematic structural diagram of a cat.1 terminal antenna structure in another embodiment provided in the present invention.

The reference numbers illustrate: 1. a first housing; 2. a second housing; 3. a first main board; 4. a second main board; 41. a coupling region; 42. a copper exposing part; 43. copper parts are not exposed; 44. a lamp panel; 45. a transparent plate; 5. cat.1 antenna trunk section; 51. a first ground terminal; 52. feeding points; 53. a second ground terminal; 6. an FPC connector; 7. FPC copper sheet; 8. and a conductive member.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

With the rapid increase of the application of the current internet-of-things intelligent terminal, the cat.1 has the advantages of high maturity and integration level, simple hardware architecture of a module, low peripheral cost and the like, so that the cat.1 bears the scene requirements of high speed and stability requirements, low power consumption and low cost in a network. In addition, with the accelerated network quit of 2G/3G, three operators in China also begin to actively guide industrial users to use Cat.1 terminal modules. The overall antenna environment of the IOT project is good, but the Cat.1 single receiver scheme cannot use an LMMSE-IRC-type receiver to perform same frequency interference suppression as the conventional LTE UE due to the lack of diversity antennas. Meanwhile, the IOT is mostly applied to the aspects of video, voice, positioning, identification and the like, the equipment is very large in size such as a camera, a loudspeaker and the like due to cost reasons, PFC or connecting wires of the camera and the loudspeaker are very long, and interference on antenna receiving caused by a screen FPC, a TP IC and the like is very large, so that the main bottleneck of antenna design and debugging of the current Cat.1 terminal is not the antenna efficiency, but the interference is solved.

That is, overcoming interference is the key to the success of the IOT project RF and antenna design. Interference is generally divided into active interference and passive interference. Electromagnetic energy is generated by using an interference source, and active application is called active interference. The active radiation is not carried out, but the antenna directional pattern is reflected and changed, and the caused great reduction of the receiving TIS is called passive interference. Active interference can be shielded by wrapping an interference source with conductive cloth to be grounded, the most difficult passive interference cannot be solved by shielding, and the prior art generally changes the position of an antenna feed or an interference device to enable an antenna to be far away from an interference device so as to reduce interference.

In order to solve the problems in the prior art, the utility model provides a Cat.1 terminal antenna structure. Referring to fig. 1, a cat.1 terminal antenna structure includes a first housing and a second housing, where the first housing and the second housing are integrally connected, and in an embodiment of the present application, the first housing and the second housing are made of a plastic material. Fixedly connected with first mainboard 3 in the first casing, the fixed connection in this application embodiment can be modes such as welding, bolted connection. The first main board 3 is connected with a cat.1 antenna main portion 5, the cat.1 antenna main portion 5 includes a feed point 52, a first ground terminal 51 and a second ground terminal 53, wherein the second ground terminal 53 is directly connected with the first main board 3 for feed coupling, so that the first main board 3 is used as a parasitic element of the cat.1 antenna main portion 5 for expanding the middle-high frequency bandwidth.

Fixedly connected with second mainboard 4 in the second casing, second casing are close to 4 fixedly connected with lamp plate 44 of second mainboard, and lamp plate 44 in this application embodiment is the slim setting to lamp plate 44 is the setting of the type of falling U along second mainboard 4, and lamp plate 44 can be used for arranging devices such as LED lamp. Offer the opening that supplies second mainboard 4 to place on the second casing, the second casing is close to the opening part and can dismantle and be connected with and be used for sealing open-ended transparent plate 45, and transparent plate 45 in this embodiment of the application is made by glass, and when in this embodiment, cat.1 terminal antenna structure is used for the equipment that needs the scanning on, is convenient for second mainboard 4 through transparent plate 45 and realizes the function of scanning.

One side that second mainboard 4 is close to first mainboard 3 is connected with FPC connector 6, and the one end of keeping away from second mainboard 4 on FPC connector 6 is connected on first mainboard 3, and FPC connector 6 passes first casing and second casing to be connected first mainboard 3 and second mainboard 4.

The first grounding terminal 51 on the cat.1 antenna main part 5 is extended with an FPC copper sheet 7, and one end of the FPC copper sheet 7 far from the first grounding terminal 51 is connected to the coupling area 41 on the second main board 4. The coupling area 41 comprises a copper exposing part 42 and a copper not exposing part 43, when the FPC copper sheet 7 is connected to the copper exposing part 42, the first grounding end 51 is in conductive connection with the coupling area 41 of the second main board 4, so that the main part 5 of the Cat.1 antenna and the coupling area 41 are grounded, and the second main board 4 becomes a part of a reference ground of the main part 5 of the Cat.1 antenna while the requirement that the main part 5 of the Cat.1 antenna needs to be connected with ground pins is met. When the FPC copper sheet 7 is connected to the copper-unexposed portion 43, the first ground terminal 51 is not conductively connected to the coupling region 41 of the second main board 4, so that the cat.1 antenna main portion 5 is feed-coupled to the coupling region 41, and the second main board 4 is equivalent to a part of the cat.1 antenna main portion 5. In summary, when the first ground terminal 51 is connected to the copper-exposed portion 42 or the copper-unexposed portion 43, equivalent fusion and unification of the main portion 5 of the cat.1 antenna, the first main board 3 and the second main board 4 are both achieved, parasitic clutter of the second main board 4 is eliminated while the antenna input impedance and the bandwidth are improved, and the problem of passive interference is solved, and data in combination with fig. 2 show that the original low-frequency B5 and B8TIS are only-70 dBm, which belongs to low-frequency strong interference, and the performance is more than-90 dBm after the cat.1 terminal antenna structure provided by the utility model is adopted, so that the cat.1 terminal antenna structure provided by the utility model can solve the passive strong interference of 20 db.

In another embodiment, in combination with the antenna OTA active measurement results comparative example, as shown in the table below,

the first grounding end 51 is connected with a conductive piece 8, one end of the conductive piece 8 far away from the first grounding end 51 is connected to the second motherboard 4, the conductive piece 8 in the embodiment of the present application can be a metal sheet such as a conductive cloth or a steel sheet, and the two ends of the conductive piece 8 are respectively connected to the first grounding end 51 and the second motherboard 4, so that the first grounding end 51 is conducted with the second motherboard 4, and further the second motherboard 4 becomes a reference ground of the cat.1 antenna trunk part 5, because the second motherboard 4 has become the reference ground of the cat.1 antenna trunk part 5, the parasitic clutter generated by the second motherboard 4 and the first motherboard 3 before will be greatly weakened or even disappear, thereby fundamentally solving the passive strong interference.

For example, the cat.1 terminal antenna structure in this embodiment is applied to an IOT mini POS machine, the first main board 3 is a POS machine main board, the second main board 4 is a small metal main board of a code-breaking screen display area, the POS machine main board is connected to the small metal main board of the code-breaking screen display area through the FPC connector 6, the second grounding end 53 of the cat.1 antenna main portion 5 is connected to the POS machine main board for feed-coupling, so that the POS machine main board is used as a parasitic element of the cat.1 antenna main portion 5 for expanding the medium-high frequency bandwidth. The first grounding terminal 51 of the cat.1 antenna trunk part 5 can extend the FPC copper sheet 7 on the first grounding terminal 51, and one end of the FPC copper sheet 7 far away from the first grounding terminal 51 is connected to the coupling area 41 on the broken code screen display area small metal mainboard, so that the broken code screen display area small metal mainboard is equivalent to one part of the cat.1 antenna trunk part 5, equivalent fusion and unification of the cat.1 antenna trunk part 5, the POS machine mainboard and the broken code screen display area small metal mainboard are realized, parasitic clutter generated by the broken code screen display area small metal mainboard and the POS machine mainboard is eliminated, and passive strong interference is fundamentally solved. The main part 5 of the cat.1 antenna can also connect the conductive part 8 on the first grounding terminal 51, and one end of the conductive part 8 far away from the first grounding terminal 51 is connected to the small metal mainboard of the code-breaking screen display area, so that the main part 5 of the cat.1 antenna is conducted with the small metal mainboard of the code-breaking screen display area, and further the small metal mainboard of the code-breaking screen display area becomes a reference ground of the main part 5 of the cat.1 antenna, and equivalent fusion and unification of the main part 5 of the cat.1 antenna, the main board of the POS machine and the small metal mainboard of the code-breaking screen display area can be realized, and the effect of eliminating passive strong interference is achieved. Secondly, the LED lamp can be arranged to lamp plate 44 on second shell 2, throws light on when using the IOT mini POS machine to scan, through transparent plate 45 on second shell 2, and the broken sign indicating number screen display district of being convenient for is little metal mainboard and is scanned, improves the use convenience of IOT mini POS machine.

In addition, the cat.1 terminal antenna structure that this application embodiment provided except using in above-mentioned IOT mini POS machine, can also be applied to other intelligent terminal, for example second mainboard 4 can be the platelet of charactron, also can be the little metal sheet of colored flowing water lamp, can also change into the vice screen platelet of blood glucose detector, law enforcement detector etc..

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a Cat.1 terminal antenna structure, its characterized in that includes first mainboard and second mainboard, be connected with Cat.1 antenna trunk portion on the first mainboard, Cat.1 antenna trunk portion includes first earthing terminal, the second mainboard with first earthing terminal is connected.

2. A cat.1 terminal antenna structure as claimed in claim 1, wherein the first ground terminal is extended with a FPC copper sheet, and one end of the FPC copper sheet away from the first ground terminal is connected to a coupling area on the second main board.

3. A cat.1 terminal antenna structure as claimed in claim 2, wherein the coupling region comprises an exposed copper portion and a non-exposed copper portion, the cat.1 antenna trunk portion is connected to the coupling region by ground when the FPC copper foil is connected to the exposed copper portion, and the cat.1 antenna trunk portion is coupled to the coupling region by feed when the FPC copper foil is connected to the non-exposed copper portion.

4. A cat.1 terminal antenna structure as claimed in claim 3, wherein the first ground terminal is connected to a conductive member, and an end of the conductive member remote from the first ground terminal is connected to the copper exposed portion of the coupling region.

5. A cat.1 terminal antenna structure as claimed in claim 1, wherein the first main board and the second main board are connected by FPC connectors.

6. The Cat.1 terminal antenna structure of claim 5, wherein the Cat.1 antenna backbone section further comprises a second ground, the second ground being connected to the first motherboard.

7. A cat.1 terminal antenna structure as claimed in claim 1, wherein the first main board is provided with a first housing, the second main board is provided with a second housing, and the first housing and the second housing are connected to each other.

8. The Cat.1 terminal antenna structure of claim 7, wherein a lamp panel is arranged on the second housing close to the second main board.

9. A Cat.1 terminal antenna structure as claimed in claim 7, wherein the second housing is opened with an opening for the second motherboard to be placed, and the second housing is provided with a transparent plate for closing the opening.