CN213124725U - Antenna assembly and mobile terminal - Google Patents
Antenna assembly and mobile terminal Download PDFInfo
- Publication number
- CN213124725U CN213124725U CN202022127930.7U CN202022127930U CN213124725U CN 213124725 U CN213124725 U CN 213124725U CN 202022127930 U CN202022127930 U CN 202022127930U CN 213124725 U CN213124725 U CN 213124725U
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- CN
- China
- Prior art keywords
- antenna
- branch
- circuit
- antenna assembly
- radiation branch
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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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
- H01Q1/36—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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- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
Abstract
The utility model provides an antenna module and mobile terminal. The antenna assembly comprises a circuit board and antenna units arranged at intervals with the circuit board; the circuit board is provided with an antenna ground, a radio frequency feed source and a feed point electrically connected with the radio frequency feed source; the first connecting end of the antenna unit is electrically connected with the antenna, and the second connecting end of the antenna unit is electrically connected with the feed point through the matching circuit. The antenna unit is electrically connected with the feed point by the matching circuit, wherein the matching circuit comprises a series LC circuit and a parallel LC circuit, so that the size of the antenna unit is greatly reduced, and the antenna unit has outstanding radiation performance, thereby reducing the occupied area of the antenna unit and avoiding crowding among antennas.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the field of communication technology, especially, relate to an antenna module and mobile terminal.
[ background of the invention ]
With the advent of 5G mobile communication mode, MIMO technology becomes more important, and in MIMO system, the requirement of antenna frequency band becomes wider and the number of antennas becomes more and more, which means that the space required by the antenna in a mobile terminal becomes larger and larger. The method can design a plurality of groups of antennas as much as possible in a limited space, and simultaneously ensures that the performance of each antenna meets the requirements, thereby being the development trend of a new generation of mobile communication terminals.
The existing 5G mobile terminal has a large number of antennas with large size, and the distribution of each antenna is crowded under the miniaturization trend of the 5G mobile terminal, which causes the reduction of the efficiency of each antenna and seriously affects the use of the 5G mobile terminal.
Therefore, it is desirable to provide an antenna assembly and a mobile terminal with smaller size and higher radiation efficiency.
[ Utility model ] content
An object of the utility model is to provide an antenna module and mobile terminal to solve among the current 5G mobile terminal antenna distribution crowded and the poor technical problem of radiation performance.
In order to solve the above technical problem, the utility model discloses a technical scheme one as follows:
an antenna assembly comprises a circuit board and an antenna unit arranged at an interval with the circuit board;
the circuit board is provided with an antenna ground, a radio frequency feed source and a feed point electrically connected with the radio frequency feed source;
the first connecting end of the antenna unit is electrically connected with the antenna, and the second connecting end of the antenna unit is electrically connected with the feed point through a matching circuit; the matching circuit comprises a series LC circuit and a parallel LC circuit;
the antenna unit comprises a first radiator and a second radiator, and the first radiator and the second radiator are arranged at intervals; the first connecting end is located on the first radiating body, and the second connecting end is located on the second radiating body.
In some embodiments of the antenna assembly, the first radiator includes a first radiating branch and a second radiating branch extending from a first end of the first radiating branch in a first direction;
the second radiator comprises a third radiation branch and a fourth radiation branch, the third radiation branch extends towards the direction close to the second radiation branch, and the fourth radiation branch extends towards the direction close to the first radiation branch from one end, close to the second radiation branch, of the third radiation branch.
In some embodiments of the antenna assembly, the first radiating branch is disposed parallel to the third radiating branch; the second radiation branch is arranged in parallel with the fourth radiation branch.
In some embodiments of the antenna assembly, the first radiating branch is disposed perpendicular to the second radiating branch; the third radiation branch is arranged perpendicular to the fourth radiation branch.
In some embodiments of the antenna assembly, the antenna assembly further comprises a first connection post and a second connection post, the first connection end being electrically connected to the antenna through the first connection post;
the second connecting end is electrically connected with the matching circuit through the second connecting column.
In some embodiments of the antenna assembly, the operating frequency of the antenna unit is 3400 MHz-3600 MHz and 4800 MHz-5000 MHz.
In some embodiments of the antenna assembly, the series LC circuit includes a parallel inductance and capacitance, and the parallel LC circuit includes a series inductance and capacitance.
In order to solve the technical problem, the utility model discloses a technical scheme two as follows:
a mobile terminal comprising an antenna assembly as described above.
The beneficial effects of the utility model reside in that:
the antenna unit is electrically connected with the feed point by the matching circuit, wherein the matching circuit comprises a series LC circuit and a parallel LC circuit, so that the size of the antenna unit is greatly reduced, and the antenna unit has outstanding radiation performance, thereby reducing the occupied area of the antenna unit and avoiding crowding among antennas.
[ description of the drawings ]
Fig. 1 is a schematic view of a spatial structure of an antenna assembly according to the present invention;
FIG. 2 is an enlarged view of part A of FIG. 1;
FIG. 3 is a schematic diagram of the circuit of the present invention;
fig. 4 is a comparison graph of return loss of the antenna assembly of the present invention and a conventional PIFA antenna;
fig. 5 is a graph comparing the antenna efficiency of the antenna assembly of the present invention with that of a conventional PIFA antenna;
fig. 6 is a schematic diagram of a partial structure of the mobile terminal of the present invention.
Wherein: 10. a mobile terminal; 100. a middle shell; 200. a front cover; 300. a rear cover; 400. an antenna assembly; 410. an antenna unit; 411. a first connection end; 412. a second connection end; 413. a first radiator; 4131. a first radiating branch; 4132. a second radiating branch; 414. a second radiator; 4141. a third radiation branch; 4142. a fourth radiation branch; 420. a circuit board; 430. a first connecting column; 440. a second connecting column.
[ detailed description ] embodiments
The present invention will be further described with reference to the accompanying drawings and embodiments.
Referring to fig. 1 to 6 together, a mobile terminal 10 according to the present invention will now be described. The mobile terminal 10 may be a mobile phone, a notebook computer, a tablet computer, a player, an earphone, a smart watch, or smart glasses. In this embodiment, the mobile terminal 10 includes a middle case 100, a front cover 200 and a rear cover 300 positioned at both sides of the middle case 100, and further includes an antenna assembly 400. The antenna assembly 400 is accommodated in a space defined by the middle case 100, the front cover 200 and the rear cover 300.
Further, the antenna assembly 400 includes an antenna unit 410 and a wiring board 420. The antenna unit 410 is spaced apart from the circuit board 420. The circuit board 420 is provided with an antenna ground, a radio frequency feed source, and a feed point electrically connected to the radio frequency feed source. The circuit board 420 is a PCB, and it is understood that in other embodiments, the circuit board 420 may also be an FPC board or a rigid-flex board. In this embodiment, the first connection terminal 411 of the antenna unit 410 is electrically connected to the antenna. The second connection terminal 412 of the antenna element 410 is electrically connected to the feeding point through a matching circuit, wherein the matching circuit includes a series LC circuit and a parallel LC circuit.
Further, the series LC circuit includes an inductor and a capacitor connected in parallel, and the parallel LC circuit includes an inductor and a capacitor connected in series.
Generally, an LC circuit in which an inductor and a capacitor are connected in parallel has a characteristic that the LC circuit exhibits inductance below a self-resonance frequency and capacitance above the self-resonance frequency, and an LC circuit in which an inductor and a capacitor are connected in series has a characteristic that the LC circuit exhibits capacitance below the self-resonance frequency and inductance above the self-resonance frequency.
In this embodiment, when the frequency is lower than the resonant frequency, the LC circuit in series exhibits an inductance, which is equivalent to an inductance connected in series between the feeding point and the second connection end 412 of the antenna unit 410; at the same time, the parallel LC circuit exhibits a capacitive behavior, corresponding to a parallel connection of a capacitor between the feed point and the second connection 412 of the antenna element 410. It is understood that the antenna element 410 and the feeding point are equivalent to a series inductance and a parallel capacitance. Meanwhile, the capacitor can filter a small amount of high-frequency signals mixed in the low-frequency signals at the feed position, and the radiation efficiency of the antenna is further improved.
When the frequency is higher than the resonant frequency, the LC circuit in series exhibits a capacitive behavior, which is equivalent to a capacitor connected in series between the feeding point and the second connection 412 of the antenna element 410; at the same time, the parallel LC circuit behaves inductively, corresponding to an inductance being connected in parallel between the feeding point and the second connection 412 of the antenna element 410. It is understood that the antenna element 410 and the feeding point are equivalent to a series capacitor and a shunt inductor. Meanwhile, the inductor can filter a small amount of low-frequency signals mixed in high-frequency signals at the feed position, and the radiation efficiency of the antenna is further improved.
Therefore, the antenna element 410 is electrically connected to the feeding point by using the matching circuit, so that the antenna element 410 can have outstanding radiation performance while being greatly reduced in size, thereby reducing the occupied area of the antenna element 410 and avoiding crowding among antennas. In this embodiment, the size of the antenna element 410 can be reduced to 62% of the original size of the conventional PIFA antenna, and the high-frequency radiation characteristic is improved by 2dB compared with the conventional PIFA antenna.
In this embodiment, the working frequency of the antenna assembly 400 is 3400 MHz-3600 MHz and 4800 MHz-5000 MHz. Fig. 4 is the return loss contrast diagram of the middle antenna assembly 400 and the conventional PIFA antenna, and it can be known from the diagram that the middle antenna assembly 400 can make the antenna unit 410 work at 3400MHz 3600MHz, and work at 4800MHz 5000MHz through adopting the matching circuit.
Fig. 5 is a comparison graph of the antenna efficiency of the antenna assembly 400 of the present invention and a conventional PIFA antenna, and it can be seen that although the antenna unit 410 of the present embodiment has a small size, a small clearance area and a short distance from the antenna ground, the antenna assembly 400 still has good antenna efficiency in two frequency bands of the operating frequency of the antenna unit 410. In particular, it can be seen that the radiation efficiency and the overall efficiency of the antenna assembly 400 are significantly higher than those of conventional PIFA antennas by about 2dB in the 4800MHz to 5000MHz frequency band. In a frequency band of 3400 MHz-3600 MHz, the radiation efficiency of the antenna component 400 and the radiation efficiency of a conventional PIFA antenna have an intersection frequency value which is about 3455MHz, the frequency is lower than 3455MHz, and the radiation efficiency of the antenna component 400 is lower than that of the conventional PIFA antenna; above 3455MHz, the radiation efficiency of the antenna element 410 is higher than that of a conventional PIFA antenna. Similarly, the total efficiency of the antenna assembly 400 and the total efficiency of the conventional PIFA antenna have a cross-point frequency value of about 3500MHz, the frequency is lower than 3500MHz, and the total efficiency of the antenna assembly 400 is lower than that of the conventional PIFA antenna; above 3500MHz, the overall efficiency of the antenna assembly 400 is higher than that of conventional PIFA antennas.
In this embodiment, the antenna unit 410 includes a first radiator 413 and a second radiator 414, and the first radiator 413 and the second radiator 414 are disposed at an interval. The first connection terminal 411 is located on the first radiator 413, and the second connection terminal 412 is located on the second radiator 414.
Further, the first radiator 413 includes a first radiation branch 4131 and a second radiation branch 4132, and the second radiation branch 4132 extends from the first end of the first radiation branch 4131 along the first direction. The second radiator 414 includes a third radiation branch 4141 and a fourth radiation branch 4142. The third radiation branch 4141 extends in a direction adjacent to the second radiation branch 4132 and the fourth radiation branch 4142 extends in a direction adjacent to the first radiation branch 4131 from an end of the third radiation branch 4141 adjacent to the second radiation branch 4132. In this embodiment, the first direction is parallel to the direction indicated by the arrow X in fig. 1.
Further, the first radiation branch 4131 is disposed in parallel with the third radiation branch 4141. The second radiation branch 4132 is arranged in parallel with the fourth radiation branch 4142.
Further, the first radiation branch 4131 is disposed perpendicular to the second radiation branch 4132. The third radiation branch 4141 is arranged perpendicularly to the fourth radiation branch 4142.
Further, the antenna assembly 400 also includes a first connection post 430 and a second connection post 440. The first connection terminal 411 is electrically connected to the antenna through the first connection post 430. The second connection terminal 412 is electrically connected to the matching circuit through the second connection post 440 and to the feeding point through the matching circuit.
In this embodiment, the antenna unit 410 can operate in Sub-6G, and compared with the conventional PIFA antenna, the size of the antenna unit 410 is greatly reduced, the radiation performance is significantly improved, and the requirement of placing multiple groups of antennas in a limited space as much as possible in the MIMO technology can be met, and the performance of each antenna can be ensured to meet the requirement.
The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.
Claims (8)
1. An antenna assembly, comprising a circuit board and an antenna unit spaced from the circuit board;
the circuit board is provided with an antenna ground, a radio frequency feed source and a feed point electrically connected with the radio frequency feed source;
the first connecting end of the antenna unit is electrically connected with the antenna, and the second connecting end of the antenna unit is electrically connected with the feed point through a matching circuit; the matching circuit comprises a series LC circuit and a parallel LC circuit;
the antenna unit comprises a first radiator and a second radiator, and the first radiator and the second radiator are arranged at intervals; the first connecting end is located on the first radiating body, and the second connecting end is located on the second radiating body.
2. The antenna assembly of claim 1, wherein the first radiator comprises a first radiating branch and a second radiating branch, the second radiating branch extending in a first direction from a first end of the first radiating branch;
the second radiator comprises a third radiation branch and a fourth radiation branch, the third radiation branch extends towards the direction close to the second radiation branch, and the fourth radiation branch extends towards the direction close to the first radiation branch from one end, close to the second radiation branch, of the third radiation branch.
3. The antenna assembly of claim 2, wherein the first radiating branch is disposed parallel to the third radiating branch; the second radiation branch is arranged in parallel with the fourth radiation branch.
4. The antenna assembly of claim 3, wherein the first radiating branch is disposed perpendicular to the second radiating branch; the third radiation branch is arranged perpendicular to the fourth radiation branch.
5. The antenna assembly of claim 4, further comprising a first connection post and a second connection post, the first connection end being electrically connected to the antenna through the first connection post;
the second connecting end is electrically connected with the matching circuit through the second connecting column.
6. The antenna assembly of claim 1, wherein the operating frequencies of the antenna elements are 3400 MHz-3600 MHz and 4800 MHz-5000 MHz.
7. The antenna assembly of claim 1, wherein the series LC circuit comprises a parallel inductance and capacitance, and wherein the parallel LC circuit comprises a series inductance and capacitance.
8. A mobile terminal comprising an antenna assembly according to any of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022127930.7U CN213124725U (en) | 2020-09-25 | 2020-09-25 | Antenna assembly and mobile terminal |
| PCT/CN2020/123581 WO2022062026A1 (en) | 2020-09-25 | 2020-10-26 | Antenna assembly and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022127930.7U CN213124725U (en) | 2020-09-25 | 2020-09-25 | Antenna assembly and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213124725U true CN213124725U (en) | 2021-05-04 |
Family
ID=75664777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022127930.7U Expired - Fee Related CN213124725U (en) | 2020-09-25 | 2020-09-25 | Antenna assembly and mobile terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN213124725U (en) |
| WO (1) | WO2022062026A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI120606B (en) * | 2003-10-20 | 2009-12-15 | Pulse Finland Oy | Internal multi-band antenna |
| CN202474194U (en) * | 2011-12-22 | 2012-10-03 | 广东步步高电子工业有限公司 | Folding inverted F-shaped and ring-shaped mixing multi-frequency range communication antenna |
| TWM470398U (en) * | 2013-07-19 | 2014-01-11 | Chi Mei Comm Systems Inc | Antenna device |
| CN104425888B (en) * | 2013-08-30 | 2019-11-22 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with the antenna structure |
| CN106450775A (en) * | 2016-06-10 | 2017-02-22 | 瑞声精密制造科技(常州)有限公司 | Mobile terminal |
-
2020
- 2020-09-25 CN CN202022127930.7U patent/CN213124725U/en not_active Expired - Fee Related
- 2020-10-26 WO PCT/CN2020/123581 patent/WO2022062026A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| WO2022062026A1 (en) | 2022-03-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210504 |