CN114243262A - Antenna structure and communication terminal - Google Patents
Antenna structure and communication terminal Download PDFInfo
- Publication number
- CN114243262A CN114243262A CN202210024331.3A CN202210024331A CN114243262A CN 114243262 A CN114243262 A CN 114243262A CN 202210024331 A CN202210024331 A CN 202210024331A CN 114243262 A CN114243262 A CN 114243262A
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- antenna
- tuning
- branch
- transverse
- antenna structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses an antenna structure and a communication terminal, wherein the antenna structure comprises a PCB (printed circuit board), an antenna bracket and an antenna unit, and the PCB comprises a stratum; the antenna bracket is arranged on one side of the PCB; the antenna unit is arranged on the antenna support and comprises a main body part, a branch part and a parasitic part, the main body part comprises a feeding end, a grounding end and a loop antenna connected with the feeding end and the grounding end, the parasitic part and the loop antenna are arranged at intervals, the branch part is connected with the loop antenna, the grounding point of the parasitic part is connected with the ground layer, the feeding end is connected with the radio frequency end of the PCB, and the grounding end is connected with the ground layer through a tuning switch. The main part of antenna and branch portion and parasitic portion cooperation for antenna element produces a plurality of frequency channels, and the tune switch can realize the switching between the different frequency channels of antenna simultaneously, and can make GPSL1 frequency channel remain good impedance match throughout, promotes the performance of antenna, still satisfies the carrier aggregation demand of a plurality of frequency channels simultaneously.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an antenna structure and a communication terminal.
Background
With the increasing demand for positioning accuracy, more and more mobile terminals are beginning to support dual-band GPS.
At present, communication equipment needs to support more and more frequency bands and has wider and wider bandwidth requirements. However, as the clearance area of the antenna is compressed due to the requirements of a full-screen and multiple cameras, the 4G antenna is difficult to meet the bandwidth requirement which needs to be supported, and the bandwidth coverage of the required frequency band needs to be met by means of a tuning switch device; meanwhile, due to the occurrence of a carrier aggregation technology, sufficient carrier frequency bands are required to exist in a certain state of an antenna in a switching process, so that a single antenna is difficult to meet the requirement of carrier aggregation after a tuning switch device is introduced, and the cost and the spatial arrangement pressure are increased by adding one GPS antenna.
Therefore, it is desirable to provide an antenna structure and a communication terminal to solve the above technical problems.
Disclosure of Invention
The invention mainly aims to provide an antenna structure and a communication terminal, and aims to solve the problem that how to use only one antenna to meet the requirement of carrier aggregation after a tuning switch device is introduced again, and inherit the GPSL1 frequency band into a 4G antenna to achieve the purposes of saving space and cost.
In order to achieve the above object, the present invention provides an antenna structure, which includes a PCB, an antenna support and an antenna unit, wherein the PCB includes a ground layer; the antenna bracket is arranged on the PCB; the antenna unit is arranged on the antenna support, the antenna unit comprises a main body part, a branch part and a parasitic part, the main body part comprises a feeding end, a grounding end and a loop antenna connected with the feeding end and the grounding end, the parasitic part and the loop antenna are arranged at intervals, the branch part is connected with the loop antenna, the grounding point of the parasitic part is connected with the ground layer, the feeding end is connected with the radio frequency end of the PCB, the grounding end is connected with the ground layer through a tuning switch, the tuning switch comprises a fixed end connected with the grounding end, a movable end rotatably connected with the fixed end and a tuning module, the movable end is connected with the tuning module, the other end of the tuning module is connected with the ground layer, and the tuning module comprises a first tuning piece, a second tuning piece and a second tuning piece, The movable end is connected with the first tuning piece, the second tuning piece, the third tuning piece and the fourth tuning piece in a switchable manner.
Optionally, the loop antenna includes a first L-shaped branch, a second L-shaped branch, and a transverse branch, where the first L-shaped branch includes a first vertical segment and a first transverse segment connected to the ground terminal, the second L-shaped branch includes a second vertical segment and a second transverse segment connected to the feed terminal, two ends of the transverse branch are respectively connected to the first vertical segment and the second vertical segment, and the transverse branch and the first transverse segment are disposed at an interval to form a coupling gap.
Optionally, the transverse branch is provided with a rectangular notch communicated with the coupling gap.
Optionally, the parasitic portion is disposed at a gap from the first lateral section.
Optionally, the branch portion includes a first sub-segment and a second sub-segment connected to each other, the first sub-segment is connected to the second transverse segment, and the second sub-segment is disposed parallel to the second transverse segment and located between the second transverse segment and the transverse branch.
Optionally, the first tuning element, the second tuning element, the third tuning element and the fourth tuning element are capacitors.
Optionally, the first tuning element, the second tuning element, the third tuning element and the fourth tuning element are inductors.
In addition, the invention also provides a communication terminal which comprises the antenna structure.
In the technical scheme of the invention, the main body part comprises a feed end, a grounding end and a loop antenna connected with the feed end and the grounding end. The feed end is connected with the radio frequency end of the PCB, and the grounding end is connected with the ground layer through the tuning switch. The resonance mode corresponding to half wavelength of the loop antenna is a low frequency band, the resonance modes corresponding to one time wavelength, one half three time wavelength and two times wavelength of the loop antenna are GPSL1 and two intermediate frequency bands respectively, and the parasitic part is coupled with the loop antenna and mainly corresponds to a high frequency band of the resonance mode. Meanwhile, the grounding end is connected with the ground layer through the tuning switch, the tuning switch can realize the switching among different frequency bands of the antenna so as to meet the bandwidth requirement of the antenna, and the tuning switch can keep the good impedance matching of the GPSL1 frequency band and can meet the carrier aggregation requirement of a plurality of frequency bands.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an antenna structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the distribution of coupling gaps in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a tuning switch according to an embodiment of the present invention;
FIG. 4 is a scattering parameter diagram of the first tuning element in accordance with an embodiment of the present invention;
FIG. 5 is a scattering parameter diagram of a second tuning element in accordance with an embodiment of the present invention;
FIG. 6 is a scattering parameter diagram of a third tuning element in accordance with an embodiment of the present invention;
FIG. 7 is a scattering parameter diagram of a fourth tuning element according to an embodiment of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes 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 invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The invention mainly aims to provide an antenna structure and a communication terminal, and aims to solve the problem that the requirement of carrier aggregation can be met by only using one antenna after a tuning switch device is introduced.
Referring to fig. 1 to 2, an antenna structure provided by the present invention includes a PCB, an antenna bracket 2, and an antenna unit, where the PCB includes an insulating layer and a ground layer 11; the antenna bracket 2 is arranged on one side of the ground layer 11; the antenna unit is arranged on the antenna bracket 2, the antenna unit comprises a main body part 3, a branch part 4 and a parasitic part 5, the main body part 3 comprises a feeding end 31, a grounding end 33 and a loop antenna 32 connected with the feeding end 31 and the grounding end 33, the parasitic part 5 and the loop antenna 32 are arranged at intervals, the branch part 4 is connected with the loop antenna 32, the grounding point of the parasitic part 5 is connected with the ground layer 11, the feeding end 31 is connected with the radio frequency end of the PCB, and the grounding end 33 is connected with the ground layer 11 through a tuning switch 8.
Specifically, the PCB is a multilayer board, wherein the insulating layer is made of FR4, the ground layer 11 is made of copper, the antenna holder 2 is disposed on one side of the ground layer 11 for carrying the antenna unit, and the antenna unit is disposed on the antenna holder 2 by mounting.
In the present embodiment, the body portion 3 includes a feeding terminal 31, a ground terminal 33, and a loop antenna 32 connecting the feeding terminal 31 and the ground terminal 33. The feeding terminal 31 is connected to the rf terminal of the PCB, and the grounding terminal 33 is connected to the ground layer 11 through the tuning switch 8. The resonance mode corresponding to half the wavelength of the loop antenna 32 is a low frequency band, the resonance modes corresponding to one time, two times and two times of the wavelength of the loop antenna 32 are GPSL1 and two intermediate frequency bands, respectively, and the parasitic part 5 is coupled with the loop antenna 32 to mainly correspond to the high frequency band of the resonance mode. Meanwhile, the grounding end 33 is connected with the ground layer 11 through the tuning switch 8, the tuning switch 8 can realize the switching among different frequency bands of the antenna so as to meet the bandwidth requirement of the antenna, and the tuning switch can keep the good impedance matching of the GPSL1 frequency band and can meet the carrier aggregation requirement of a plurality of frequency bands.
Further, the loop antenna 32 includes a first L-shaped branch, a second L-shaped branch and a transverse branch 327, the first L-shaped branch includes a first vertical section 322 and a first transverse section 323 connected to the ground terminal 33, the second L-shaped branch includes a second vertical section 325 and a second transverse section 326 connected to the feeding terminal 31, two ends of the transverse branch 327 are respectively connected to the first vertical section 322 and the second vertical section 325, and the transverse branch 327 and the first transverse section 323 are disposed at an interval to form a coupling gap 6.
In this embodiment, the loop antenna 32 includes a first L-shaped branch, a second L-shaped branch and a horizontal branch 327 connected in sequence, where the first L-shaped branch includes a first horizontal section 323 connected to the ground terminal 33 and a first vertical section 322 connected to the first horizontal section 323, the second L-shaped branch includes a second horizontal section 326 connected to the feeding terminal 31 and a second vertical section 325 connected to the second horizontal section 326, two ends of the horizontal branch 327 are respectively connected to the first vertical section 322 and the second vertical section 325, and the horizontal branch 327 and the first horizontal section 323 and the second horizontal section 326 are both disposed at an interval. Specifically, the first vertical section 322 has a width greater than that of the second vertical section 325, and the first horizontal section 323 has a length greater than that of the second horizontal section 326.
Furthermore, the transverse branch 327 is opened with a rectangular notch 7 communicating with the coupling gap 6. In the present embodiment, the rectangular notch 7 is disposed toward the first transverse section 323, and the resonant frequency of the antenna is adjusted by the rectangular notch 7 and the coupling gap 6.
Further, the parasitic part 5 is disposed with a gap from the first lateral section 323. In this embodiment, the parasitic element 5 and the first transverse segment 323 are coupled by a gap setting for controlling the range of the high frequency.
Further, the branch portion 4 comprises a first subsection 41 and a second subsection 42 connected to each other, the first subsection 41 is connected to the second transverse section 326, and the second subsection 42 is arranged in parallel with the second transverse section 326 and is located between the second transverse section 326 and the transverse branch 327.
In the present embodiment, the branch portion 4 includes a first sub-section 41 and a second sub-section 42 connected to each other, the first sub-section 41 is connected to the second transverse section 326, and the second sub-section 42 and the second transverse section 326 are spaced apart to form a gap for tuning the GPS L1.
Further, the tuning switch 8 includes a fixed end 81 connected to the ground end 33, a movable end 82 rotatably connected to the fixed end 81, and a tuning module 83, wherein the movable end 82 is connected to the tuning module 83, and the other end of the tuning module 83 is connected to the ground layer 11. In this embodiment, the tuning module 83 may switch different states, and each specific state may satisfy a corresponding frequency band of multiple carrier aggregation, so as to improve a peak rate of user access to the internet, and simultaneously, ensure that the frequency band of the GPS L1 always maintains good impedance matching, thereby achieving the purpose of saving space and cost.
Referring to fig. 4 to 7, the tuning module 83 includes a first tuning element 831, a second tuning element 832, a third tuning element 833 and a fourth tuning element 834, and the movable end 82 is switchably connected to the first tuning element 831, the second tuning element 832, the third tuning element 833 and the fourth tuning element 834. In this embodiment, after the first tuning element 831 is connected to the active end 82, the first state is switched to a first state according to a corresponding frequency band, specifically, the first state includes a plurality of carrier aggregation frequency bands, and the plurality of carrier aggregation frequency bands can both meet a good impedance matching requirement. Specifically, the first state includes a first carrier aggregation state: band1/Band3/Band5/Band7, second carrier aggregation state: band1/Band3/Band7/Band20, third carrier polymerization state; band1/Band3/Band5/Band40, fourth carrier aggregation state: when the method is implemented, the Band1/Band3/Band5/Band41 may also include other carrier aggregation states, and is not limited to the above four carrier aggregation states, and the GPS L1 frequency Band in the above four carrier aggregation states has good impedance matching.
Correspondingly, the active end 82 is connected to the second tuning element 832 after being switched, and is switched to the second state according to the corresponding frequency band, specifically, the carrier aggregation state of the second state is: the Band1/Band3/Band7/Band8, and the GPS L1 frequency Band in the carrier aggregation state can also keep good impedance matching requirements.
When the active end 82 is switched to connect with the third tuner 833, the active end is switched to the third state according to the corresponding frequency band, specifically, the carrier aggregation state of the third state is: when the impedance matching is implemented, the Band1/Band7/Band40 can also include other carrier aggregation states, and the CPS L1 frequency Band in the carrier aggregation state of the third state also has good impedance matching.
When the active end 82 is switched to be connected to the fourth tuning element 834, the active end is switched to a fourth state according to a corresponding frequency band, specifically, a carrier aggregation state of the fourth state is: when the impedance matching is implemented, the Band1/Band3/Band12 can also include other carrier aggregation states, and the CPS L1 frequency Band in the carrier aggregation state of the fourth state also has good impedance matching.
Further, the first tuning element 831, the second tuning element 832, the third tuning element 833 and the fourth tuning element 834 are capacitors.
Further, the first tuning element 831, the second tuning element 832, the third tuning element 833 and the fourth tuning element 834 are inductors.
In addition, the invention also provides a communication terminal which comprises the antenna structure and has all the beneficial effects of the antenna structure.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. An antenna structure, comprising:
a PCB board including a ground layer;
the antenna bracket is arranged on the PCB;
the antenna unit is arranged on the antenna bracket and comprises a main body part, a branch part and a parasitic part, the main body part comprises a feed end, a grounding end and a loop antenna connected with the feed end and the grounding end, the parasitic part and the loop antenna are arranged at intervals, the branch part is connected with the loop antenna, the grounding point of the parasitic part is connected with the ground layer, the feed end is connected with the radio frequency end of the PCB, the grounding end is connected with the ground layer through a tuning switch, the tuning switch comprises a fixed end connected with the grounding end, a movable end rotationally connected with the fixed end and a tuning module, the movable end is connected with the tuning module, the other end of the tuning module is connected with the ground layer, and the tuning module comprises a first tuning piece, a second tuning piece, a third tuning piece and a fourth piece, The movable end is connected with the first tuning piece, the second tuning piece, the third tuning piece and the fourth tuning piece in a switchable manner.
2. The antenna structure according to claim 1, wherein the loop antenna comprises a first L-shaped branch, a second L-shaped branch and a transverse branch, the first L-shaped branch comprises a first vertical segment and a first transverse segment connected to the ground terminal, the second L-shaped branch comprises a second vertical segment and a second transverse segment connected to the feed terminal, two ends of the transverse branch are respectively connected to the first vertical segment and the second vertical segment, and the transverse branch and the first transverse segment are arranged at a distance to form a coupling gap.
3. The antenna structure of claim 2, wherein the lateral branches define rectangular notches that communicate with the coupling gaps.
4. The antenna structure of claim 2, wherein the parasitic portion is disposed at a gap from the first transverse segment.
5. The antenna structure according to claim 2, characterized in that the branch comprises a first subsection and a second subsection connected to each other, the first subsection being connected to the second transverse section, the second subsection being arranged parallel to the second transverse section and being located between the second transverse section and the transverse branch.
6. The antenna structure of claim 1, wherein the first tuning element, the second tuning element, the third tuning element, and the fourth tuning element are capacitors.
7. The antenna structure of claim 1, wherein the first tuning element, the second tuning element, the third tuning element, and the fourth tuning element are inductors.
8. A communication terminal comprising an antenna arrangement according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210024331.3A CN114243262A (en) | 2022-01-11 | 2022-01-11 | Antenna structure and communication terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210024331.3A CN114243262A (en) | 2022-01-11 | 2022-01-11 | Antenna structure and communication terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114243262A true CN114243262A (en) | 2022-03-25 |
Family
ID=80746073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210024331.3A Pending CN114243262A (en) | 2022-01-11 | 2022-01-11 | Antenna structure and communication terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114243262A (en) |
-
2022
- 2022-01-11 CN CN202210024331.3A patent/CN114243262A/en active Pending
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