CN109921178A - Mobile terminal antenna device - Google Patents
Mobile terminal antenna device Download PDFInfo
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- CN109921178A CN109921178A CN201910123845.2A CN201910123845A CN109921178A CN 109921178 A CN109921178 A CN 109921178A CN 201910123845 A CN201910123845 A CN 201910123845A CN 109921178 A CN109921178 A CN 109921178A
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- radiator
- active switch
- antenna
- switching circuit
- mobile terminal
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- 239000003990 capacitor Substances 0.000 claims description 17
- 238000013461 design Methods 0.000 abstract description 25
- 230000003071 parasitic effect Effects 0.000 abstract description 11
- 230000005855 radiation Effects 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 4
- 238000002955 isolation Methods 0.000 abstract description 3
- 230000024241 parasitism Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- PEZNEXFPRSOYPL-UHFFFAOYSA-N (bis(trifluoroacetoxy)iodo)benzene Chemical compound FC(F)(F)C(=O)OI(OC(=O)C(F)(F)F)C1=CC=CC=C1 PEZNEXFPRSOYPL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a kind of mobile terminal antenna devices, it is related to communication antenna technical field, including the first radiator, first radiator connects the first signal output end of processor by signal source, one end of second radiator is connect by switching circuit with the first radiator, the other end of second radiator is grounded by the first active switch, and the second signal output end and third signal output end of processor are separately connected the control signal input of switching circuit and the first active switch.The present invention designs the tuning of multiple antennas body by switching circuit, it realizes under small radiation environment, the tunable of parasitic frequency range, antenna radiator be restructural and the compatible design of multiple antennas, and a variety of tunable schemes can be provided by antenna parasitism and the restructural mode of radiator, to realize the wideband/multifrequency design and multiple antennas short distance high-isolation degree design of antenna.
Description
Technical field
The invention belongs to communication antenna technical fields, more particularly to a kind of mobile terminal antenna device.
Background technique
With the development of the communication technology and technology of Internet of things, the carrier of mobile communication terminal is from mobile phone to each traditional industries
Field infiltration, such as wearable product, Internet of Things monitoring device, smart home.The product of mobile communication function demand is increased
Meanwhile product design also faces the design demand of terminal.In face of miniaturization portable product or all-metal looking products
Design environment, the miniaturization of antenna, wideband design requirement become clear day by day.
Reforming unit of the antenna as electromagnetic signal, many-sided design parameters such as radiation efficiency, covering bandwidth depend on
In the headroom of antenna and the electromagnetic environment on periphery.The designer trends of the said goods bring to the design of antenna performance very important
Negative effect.At the same time, 5G communication has further requirement to the wide frequency technology of product, and integrated, the miniaturization of antenna are set
Meter, wideband design are also that research and development need the technical barrier captured in the industry at present.
The antenna wideband designing technique of mobile communication product at present, it is main to use since Antenna Design area is generally insufficient
Parasitic couplings or antenna active switch/variable capacitance realize that the wideband of existing antenna designs to the tuning of Antenna Impedance Matching.But
Have its design problem: parasitic couplings realize parasitism by electromagnetic radiation using the parasitic body and antenna body of ground connection, but can not
It realizes multifrequency tuning and the coupling area tool of antenna body and parasitic branch there are certain requirements, be not suitable for miniature antenna design；
Antenna active switch/variable capacitance can only implement frequency range tuning to single antenna radiator to the tuning of Antenna Impedance Matching, can not
Frequency wideband design simultaneously is faced in realization, its design is still limited under more rugged environment.
Summary of the invention
In view of the above drawbacks of the prior art, technical problem to be solved by the invention is to provide a kind of high-isolation,
The mobile terminal antenna device of wideband design.
To achieve the above object, the present invention provides a kind of mobile terminal antenna device, including the first radiator, described
One radiator connects the first signal output end of processor by signal source, and one end of the second radiator passes through switching circuit and institute
The connection of the first radiator is stated, the other end of second radiator is grounded by the first active switch, and the second of the processor
Signal output end connects the control signal input of the switching circuit, described in the third signal output end connection of the processor
The control signal input of first active switch controls the switching circuit and first active switch by the processor
On-off, realize the more reconstitituted forms of single antenna.
Using above technical scheme, by switching circuit to switch/tuning between the first radiator and the second radiator
Effect and switch tune the ground connection of the second radiator, realize the restructural of multiple antennas form, reach the mesh for increasing the beamwidth of antenna
's.
Further, the switching circuit is variable capacitance.
Further, the variable capacitance is divided into high-impedance state or low resistive state for working frequency range, when it is described can power transformation
Hold under high-impedance state, first radiator and second radiator are in off state, at the variable capacitance
Under low resistive state, first radiator and second radiator are in short-circuit condition.
Using above technical scheme, by the capacitive effect of variable capacitance, realize the second radiator and the first radiator it
Between on-off action, realize the second radiator as the restructural of antenna branch or parasitic radiator.
Further, the switching circuit is that the series connection of the second active switch is more than two inductively or capacitively.
Further, one end of second active switch connects first radiator, second active switch
The other end is connect by first capacitor and the second capacitor in parallel with second radiator, the signal output end of the processor
Connect the control signal input of second active switch.
Using above technical scheme, the second active switch is controlled by processor, makes the first radiator and the second radiator
Between connect the capacitors of different capacitances, realize the on-off between the second radiator and the first radiator, and then realize the second spoke
Beam is restructural as antenna branch or parasitic radiator.
Preferably, further including matching device, first active switch is connected to the ground by matching device.
Preferably, the matching device includes inductively or capacitively.
The beneficial effects of the present invention are: the present invention can design the tuning of multiple antennas body by switching circuit, realize
Under small radiation environment, the tunable of parasitic frequency range, antenna radiator be restructural and the compatible design of multiple antennas, and is posted by antenna
The raw and restructural mode of radiator can provide a variety of tunable schemes, to realize the wideband/multifrequency design and multiple antennas of antenna
Short distance high-isolation degree design.
Detailed description of the invention
Fig. 1 is the block schematic illustration of the embodiment of the invention.
Fig. 2 is the block schematic illustration of another specific embodiment of the present invention.
Fig. 3 is that the first active switch is grounded in the embodiment of the invention, signal when switching circuit short-circuit condition
Figure.
Fig. 4 is that the first active switch is grounded in the embodiment of the invention, signal when switching circuit off state
Figure.
Fig. 5 is the open circuit of the first active switch, signal when switching circuit short-circuit condition in the embodiment of the invention
Figure.
Fig. 6 is the open circuit of the first active switch, signal when switching circuit off state in the embodiment of the invention
Figure.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples:
Embodiment 1: as shown in Figure 1, a kind of mobile terminal antenna device, including the first radiator 1, first radiator
1 connects the first signal output end of processor 4 by signal source 2, and one end of the second radiator 3 passes through switching circuit and described the
The other end of the connection of one radiator 1, second radiator 3 is grounded by the first active switch 5, and the second of the processor 4
Signal output end connects the control signal input of the switching circuit, and the third signal output end of the processor 4 connects institute
The control signal input for stating the first active switch 5 controls the switching circuit and described first active by the processor 4
The on-off of switch 5 realizes the more reconstitituted forms of single antenna.
It further include matching device 6, first active switch 5 is connected to the ground by matching device 6, the matching device 6
Including inductively or capacitively, in the present embodiment, matching device is two capacitors in parallel.
In the present embodiment, the switching circuit is variable capacitance 7.
The variable capacitance 7 is divided into high-impedance state or low resistive state for working frequency range, when the variable capacitance 7 is in height
Under resistance state, first radiator 1 is in off state with second radiator 3, when the variable capacitance 7 is in low-resistance
Under state, first radiator 1 is in short-circuit condition with second radiator 3.
Embodiment 2: as shown in Fig. 2, the present embodiment and the structure of embodiment 1 are essentially identical, except that the switch
Circuit is that the second active switch 8 is connected more than two capacitors.
One end of second active switch 8 connects first radiator 1, the other end of second active switch 8
It is connect by first capacitor C1 and the second capacitor C2 in parallel with second radiator 3, the signal output end of the processor 4
Connect the control signal input of second active switch 8.
In the present embodiment, first capacitor C1 is big capacitance, and the second capacitor C2 is low-capacitance.
As shown in figure 3, can be equivalent to when the first active switch 5 is grounded by matching device 6 accordingly to the second radiator
3 shape is changed, and when variable capacitance 7 is in low-capacitance state or the second active switch 8 and connects the second capacitor C2, pre-
If in working frequency range can short-circuit aerial signal, and play tuning signal self-resonance point, the first radiator 1 and the second radiator 3
Short-circuit condition is within the scope of working frequency range, the second radiator 3 is constituted in working frequency range with the first radiator 1 and is electrically connected, the
The a part of two radiators 3 as 1 antenna of the first radiator, variable capacitance 7 or the second capacitor C2 are equivalent to the first radiation of connection
The connector of body 1 and the second radiator 3, they constitute an entirety, and antenna constitutes PIFA antenna configurations at this time, have work frequency
Section f1.
As shown in figure 4, can be equivalent to when the first active switch 5 is grounded by matching device 6 accordingly to the second radiator
3 shape is changed, and when variable capacitance 7 is in big capacitance state or the second active switch 8 and connects first capacitor C1, and first
Radiator 1 and the second radiator 3 are in off state within the scope of working frequency range, and the second radiator 3 and the first radiator 1 are not
The electrical connection being formed in working frequency range, but there is signal electromagnet coupling radiation, the second radiator 3 has at this time radiates to first
The electromagnetic coupling of body 1 is parasitic, at this point, antenna constitutes conventional primary antenna radiator and ground connection passive antenna radiator design, tool
There are primary antenna working frequency range f2 and parasitic frequency range f3.
As shown in figure 5, when 5 open circuit of the first active switch, and variable capacitance 7 is in low-capacitance state or the second active switch
8 when connecting the second capacitor C2, in default working frequency range can short-circuit aerial signal, and play tuning signal self-resonance point, the
One radiator 1 and the second radiator 3 are in short-circuit condition, 1 structure of the second radiator 3 and the first radiator within the scope of working frequency range
At being electrically connected in working frequency range, antenna branch of second radiator 3 as the first radiator, and directly presented with antenna signal source
Electricity has primary antenna working frequency range f2 and parasitic frequency range f4 at this point, antenna constitutes multiple-limb Antenna Design.
As shown in fig. 6, when 5 open circuit of the first active switch, and variable capacitance 7 is in big capacitance state or the second active switch
When 8 connection first capacitor C1, the first radiator 1 and the second radiator 3 are in off state, the second spoke within the scope of working frequency range
Beam 3 is independent metallic object and is excited by electromagnetic coupling form by the first radiator 1, becomes the antenna of the first radiator 1
Branch, and coupled with antenna signal source, at this point, antenna constitutes multiple-limb Antenna Design, there is primary antenna working frequency range f2 and post
Raw frequency range f5.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (7)
1. a kind of mobile terminal antenna device, it is characterised in that: including the first radiator (1), first radiator (1) passes through
Signal source (2) connects first signal output end of processor (4), one end of the second radiator (3) by switching circuit with it is described
The other end of first radiator (1) connection, second radiator (3) is grounded by the first active switch (5), the processor
(4) second signal output end connects the control signal input of the switching circuit, and the third signal of the processor (4) is defeated
Outlet connects the control signal input of first active switch (5), controls the switching circuit by the processor (4)
With the on-off of first active switch (5), the more reconstitituted forms of single antenna are realized.
2. mobile terminal antenna device as described in claim 1, it is characterised in that: the switching circuit is variable capacitance (7).
3. mobile terminal antenna device as claimed in claim 2, it is characterised in that: the variable capacitance (7) is for work frequency
Section is divided into high-impedance state or low resistive state, when the variable capacitance (7) be under high-impedance state, first radiator (1) and
Second radiator (3) is in off state, when the variable capacitance (7) is under low resistive state, first radiator
(1) short-circuit condition is in second radiator (3).
4. mobile terminal antenna device as described in claim 1, it is characterised in that: the switching circuit is the second active switch
(8) series connection is more than two inductively or capacitively.
5. mobile terminal antenna device as claimed in claim 4, it is characterised in that: one end of second active switch (8)
First radiator (1) is connected, the other end of second active switch (8) passes through first capacitor (C1) and second in parallel
Capacitor (C2) is connect with second radiator (3), and the signal output end of the processor (4) connects second active switch
(8) control signal input.
6. mobile terminal antenna device as described in claim 1, it is characterised in that: it further include matching device (6), described first
Active switch (5) is connected to the ground by matching device (6).
7. mobile terminal antenna device as claimed in claim 6, it is characterised in that: the matching device (6) include capacitor or
Inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910123845.2A CN109921178A (en) | 2019-02-19 | 2019-02-19 | Mobile terminal antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910123845.2A CN109921178A (en) | 2019-02-19 | 2019-02-19 | Mobile terminal antenna device |
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| Publication Number | Publication Date |
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| CN109921178A true CN109921178A (en) | 2019-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910123845.2A Pending CN109921178A (en) | 2019-02-19 | 2019-02-19 | Mobile terminal antenna device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110718745A (en) * | 2019-09-02 | 2020-01-21 | 深圳市和盈互联科技有限公司 | Multi-frequency multiplexing antenna device and smart watch |
| CN110729550A (en) * | 2019-09-02 | 2020-01-24 | 深圳市和盈互联科技有限公司 | Antenna device and intelligent watch |
| CN112350054A (en) * | 2019-08-09 | 2021-02-09 | 青岛海信移动通信技术股份有限公司 | Mobile terminal |
| CN112350078A (en) * | 2019-08-09 | 2021-02-09 | 青岛海信移动通信技术股份有限公司 | Mobile terminal |
| CN112531330A (en) * | 2019-09-18 | 2021-03-19 | 青岛海信移动通信技术股份有限公司 | Mobile terminal and mobile terminal accessory equipment |
| CN113871851A (en) * | 2021-08-31 | 2021-12-31 | 荣耀终端有限公司 | Terminal antenna and mobile terminal equipment |
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