CN107732452A - Slot antenna device and terminal device - Google Patents
Slot antenna device and terminal device Download PDFInfo
- Publication number
- CN107732452A CN107732452A CN201710839664.0A CN201710839664A CN107732452A CN 107732452 A CN107732452 A CN 107732452A CN 201710839664 A CN201710839664 A CN 201710839664A CN 107732452 A CN107732452 A CN 107732452A
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- CN
- China
- Prior art keywords
- metal shell
- pcb board
- slot antenna
- fed element
- antenna device
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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.)
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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
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
-
- 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
-
- 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
-
- 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
Landscapes
- Waveguide Aerials (AREA)
Abstract
The invention belongs to the communications field, more particularly to a kind of slot antenna device and terminal device, including metal shell, a fine crack is offered on metal shell, the both sides of fine crack have the first distributing point and the second distributing point being oppositely arranged respectively, in metal shell a power feeding module is provided with fine crack, power feeding module includes a pcb board and the ground strip on pcb board, there is the first fed element and the second fed element being oppositely arranged on pcb board, first fed element is connected to the first distributing point, second fed element is connected to the second distributing point, and first fed element be located on ground strip and be connected with ground strip, second fed element is isolated with ground strip, and second fed element be connected with a microstrip line being arranged on pcb board, the other end of microstrip line has the pad for being used for connecting coaxial feeder.The present invention avoids the shielding action of metal shell from influenceing by way of opening up fine crack on metal shell, realizes preferable omnidirectional's coverage property.
Description
Technical field
The invention belongs to the communications field, more particularly to a kind of slot antenna device and terminal device.
Background technology
It is more and more in order to meet the demand of the aesthetic property of product in local area network terminal product and smart home product
Use metallized finishes and built-in antenna.When using metal shell and built-in aerial, Antenna Design turns into a big difficult point,
The shielding action for being difficult to avoid that metal shell using common built-in aerial influences, and signal is difficult to effectively to external radiation, omnidirectional's covering
Characteristic is poor.More volume mode makes partial shell making plastic cement material at present, by Antenna Design how the part, it is but this
Design method still limits the signal coverage rate of antenna, and influences outward appearance, can not meet the needs of product aesthetic property.
In order to solve the above-mentioned technical problem, people have carried out long-term exploration, such as Chinese patent discloses a kind of antenna
Structure and the radio communication device [application number with the antenna structure：CN201620843908.3], including metalwork and first
Feed-in source, the metalwork include metal front frame, metal backing and metal edge frame, and the metal edge frame is located in the metal
Between front frame and the metal backing, the metal edge frame comprises at least top, the first sidepiece and the second sidepiece, and described first
Sidepiece is connected the both ends at the top with second sidepiece respectively, offers fluting on the metal edge frame, before the metal
Breakpoint is offered on frame, the fluting is at least laid on the top, the breakpoint with it is described fluting connect and extend to every
The disconnected metal front frame, the first feed-in source is electrically connected to the metal front frame.
For another example, the metal shell [publication number of a kind of slot antenna for radio communication equipment：EP1858112B1],
It includes a metallic plate for being used for radio communication equipment, offers groove on metallic plate, makes one as antenna of metallic plate
Divide, improve the signal coverage rate of antenna.
Although such scheme can solve the problem that partial technical problems, but still have defect, for example, structure is excessively complicated,
Assembling is difficult, and omnidirectional's coverage property of antenna is still not good etc. enough.
The content of the invention
A kind of regarding the issue above, the present invention provides simple in construction, good slot antenna of omnidirectional's coverage property
Device；
The another object of this programme is to provide a kind of terminal device using above-mentioned slot antenna device.
To reach above-mentioned purpose, present invention employs following technical proposal：
A kind of slot antenna device, including metal shell, offer a fine crack on described metal shell, and the two of fine crack
Side has the first distributing point and the second distributing point being oppositely arranged respectively, and one is provided with fine crack in described metal shell
Power feeding module, described power feeding module include a pcb board and the ground strip on pcb board, had on described pcb board relative
The first fed element and the second fed element set, the first described fed element are connected to the first distributing point, the described second feed
Part is connected to the second distributing point, and the first described fed element is located on ground strip and is connected with ground strip, the described second feed
Part is isolated with ground strip, and the second described fed element is connected with a microstrip line being arranged on pcb board, described microstrip line
The other end have and be used to connect the pad of coaxial feeder.
Above-mentioned technical proposal, by opening up fine crack on metal shell, whole metal shell is used as antenna, both avoided
Part uses open defect caused by plastic cement material, and and can enough realizes preferable omnidirectional's coverage property.
In above-mentioned slot antenna device, the first described fed element and the second fed element are metal clips.
In above-mentioned slot antenna device, there are two grooves being adapted with metal clips in described metal shell
It is spacing for being carried out to metal clips, and two grooves are respectively positioned at the side of the first distributing point and the side of the second distributing point.
In above-mentioned slot antenna device, the first described fed element and the second fed element include being opened in pcb board
On through hole, described through hole is equipped with metallic screw, and the first described distributing point side and the second distributing point side are all provided with
It is equipped with the metallic stud being adapted with metallic screw.
In above-mentioned slot antenna device, described pcb board is double-layer PCB board, and the front and back of double-layer PCB board is equal
Ground strip is equipped with, and multiple metalized conductive through holes for being used to connect upper and lower two layers of ground strip are offered on double-layer PCB board, and
Running through in metalized conductive through hole has conductive pole.
In above-mentioned slot antenna device, described metal shell is formed in one structure.
In above-mentioned slot antenna device, the width of described fine crack is 1~3mm, the length of fine crack for (2 λ/5)~
(3 λ/5), λ are wavelength corresponding to the working frequency range of antenna.
In above-mentioned slot antenna device, the first described distributing point and the second distributing point are located at apart from fine crack one end (2
λ/25)~(3 λ/25) place.
A kind of terminal device, including slot antenna device.
In above-mentioned terminal device, the metal shell of described slot antenna device is trapezoidal hollow knot in cross section
Structure, is provided with display screen on one of surface of described metal shell, the display screen back side be located in metal shell have with
The circuit main board of display screen connection, the opposite face in face, the prevention at radio-frequency port of described circuit main board where fine crack is opened in display screen
Microstrip line is connected to by coaxial feeder.
The present invention has advantages below compared to prior art：1st, it is simple in construction, good appearance；2nd, production and assembly are convenient；
3rd, it is not good by the screening effect of metal shell, omnidirectional's coverage property.
Brief description of the drawings
Fig. 1 is the structural representation of the slot antenna device of the embodiment of the present invention one；
Fig. 2 is the front view of the power feeding module of the embodiment of the present invention one；
Fig. 3 is the front view of the metal shell of the embodiment of the present invention one；
Fig. 4 is the structural representation one for the power feeding module that the embodiment of the present invention one pumps pcb board；
Fig. 5 is the structural representation two for the power feeding module that the embodiment of the present invention one pumps pcb board；
Fig. 6 is device model figure of the embodiment of the present invention one using slot antenna device；
Fig. 7 is the S11 Parameter Maps of the simulation experiment result of the embodiment of the present invention one；
Fig. 8 is the directional diagram of the simulation experiment result of the embodiment of the present invention one.
Reference：Metal shell 1；Fine crack 11；First distributing point 12；Second distributing point 13；Power feeding module 2；Pcb board
21；Ground strip 22；Second fed element 23；Microstrip line 24；First fed element 25；Metalized conductive through hole 26；Conductive pole 27；Display
Screen 3；Circuit main board 31；Coaxial feeder 4.
Embodiment
The slot antenna device and terminal device of the present invention use the metal shell of integration, and by metal shell
Appropriate length and the fine crack of width are opened up, and distributing point is chosen so that metal shell is integrally used as into day in the correct position of fine crack
Line, so as to realize preferable omnidirectional's coverage property, solve complicated in the prior art, the metal such as omnidirectional's coverage property difference is asked
Topic, it is the preferred embodiments of the present invention and with reference to accompanying drawing below, technical scheme is further described, but this hair
It is bright to be not limited to these embodiments.
Embodiment one
As shown in Figures 1 to 5, present embodiment discloses a kind of slot antenna device, including metal shell 1, metal shell 1
On offer a fine crack 11, the fine crack 11 can be the fine crack 11 that horizontal fine crack 11, vertical or other any directions are set,
Metal shell 1 is box-like in circumferential closed integration, or, metal shell 1 is in integrated box-like, opening with an opening
Place can be used for be embedded the grade hardware device of display screen 3, further, art personnel should be known that here it is box-like not
It is limited to rectangular shape, or cross section is triangle, trapezoidal or polygon etc..
Further, the both sides of fine crack 11 have the first distributing point 12 and the second distributing point 13 being oppositely arranged, feedback respectively
Electricity point effect be that transmitting end signal is led to metal shell 1, the point extracted is exactly distributing point, and in order that laser propagation effect more
It is good, distributing point is arranged in apart from the one end of fine crack 11 (2 λ/25)~(3 λ/25) place.
Further, a power feeding module 2 is provided with fine crack 11 in metal shell 1, will by this power feeding module 2
The distributing point 13 of coaxial feeder 4 and second is attached to realize feed.
Specifically as shown in Fig. 2 power feeding module 2 includes a pcb board 21 and the ground strip 22 on pcb board 21, here
Pcb board 21 be double-layer PCB board 21, the front and back of double-layer PCB board 21 is equipped with ground strip 22, that is to say, that here
Ground strip 22 be also double-deck ground strip 22, but two ground strips 22 are spaced by pcb board 21.The edge of two panels ground strip 22
Edge with pcb board 21 is flushed, and still, ground strip 22 is of an L-shaped structure, and is said vividerly, one of corner of pcb board 21
Region is not grounded piece 22 and covered, and this corner regions for not being grounded the covering of piece 22 is used to place fed element.
Here there are two fed elements being oppositely arranged, respectively the first fed element 25 and the second feed on pcb board 21
Part 23, the first fed element 25 are connected to the first distributing point 12, and the second fed element 23 is connected to the second distributing point 13, and the first feed
Part 25 is located on ground strip 22 and is connected with ground strip 22, that is to say, that the first fed element 25 is located at the region where ground strip 22
Directly it is connected with ground strip 22, certainly, the first fed element 25 and the second fed element 23 here are metalwork for transmission
Signal.
Second fed element 23 is isolated with ground strip 22, that is to say, that the second fed element 23 is covered positioned at not being grounded piece 22
Corner regions.
More specifically, the second fed element 23 is connected with a microstrip line 24 being arranged on pcb board 21, microstrip line 24 is one
Banding leads (signal wire), is opened between ground level with a kind of dielectric isolation, is adapted to the planar structure for making microwave integrated circuit
Transmission line, compared with metal waveguide, it has small volume, in light weight, service band is wide, reliability is high low with manufacturing cost etc. excellent
Point, thickness, width, printed conductor and the distance on stratum of printed conductor and dielectric dielectric constant determine microstrip line 24
Characteristic impedance, if the thickness of line, width and be controllable, its characteristic impedance with the distance between ground level
Be it is controllable, the propagation delay time of unit length microstrip line be dependent only on dielectric constant and with the width of line or interval
Unrelated, the present embodiment is by the cabling of microstrip line 24 in PCB surface, and delay is smaller, for general FR4 sheet material, 1inch microstrip lines pair
The cabling delay about 140ps answered.
The other end of microstrip line 24 has the pad for being used for connecting coaxial feeder 4, and feeder line is early stage television set and outdoor
The signal wire of antenna connection, its line is flat and generally two-wire, has relatively wide distance between two lines, the purpose for the arrangement is that reducing
Decay of the distribution capacity to TV small-signal between line, its main task are effectively transmitted signal energies, and therefore, it should be able to
The signal power that transmitting terminal is sent is sent to the input of transmitting antenna, or the signal that antenna is received with the loss of minimum
Receiver inlet is sent to the loss of minimum.
Wherein, microstrip line 24 can be located at the corner regions for not being grounded the covering of piece 22, or, open up one on ground strip 22
The passage of microstrip line 24 is used to place microstrip line 24 so that microstrip line 24 is isolated with ground strip 22.
Preferably, the first fed element 25 and the second fed element 23 are metal clips, and have in metal shell 1 two with
The groove that metal clips is adapted is spacing for being carried out to metal clips, and two grooves are located at the one of the first distributing point 12 respectively
Side and the side of the second distributing point 13, power feeding module 2 can use the screw of plastic material or other structures to be fixed on outside metal
The inside of shell 1, the presence of groove are easy to improve assembly precision, and the depth of groove typically uses 0.5-2mm, certainly, here not
It is limited to this scope, can be specifically adjusted as needed.
In order to which upper and lower two layers of ground strip 22 is attached, offered on double-layer PCB board 21 multiple for above and below connecting two
The metalized conductive through hole 26 of layer ground strip 22, conductive pole 27, two panels ground connection are inserted with metalized conductive through hole 26 here
Through hole can be accordingly offered on piece 22, conductive pole 27 is extended to after conductive hole in the through hole on ground strip 22,
Two ground strips 22 are fixed on to the both sides of pcb board 21 while by two panels ground strip 22 in succession, are favorably improved the whole of structure
Body.
Preferably, the width of fine crack 11 is 1~3mm, and the length of fine crack 11 is (2 λ/5)~(3 λ/5), and λ is the work of antenna
Make wavelength corresponding to frequency range.
The slot antenna device of the present embodiment can be used for all multi-terminal equipments, such as mobile phone, wrist-watch, router etc. intelligently to set
It is standby.
Had below using the display device for the slot antenna that 2.4~2.5GHz frequency ranges are worked in one as model
Body explanation：
As shown in fig. 6, the metal shell 1 of slot antenna device here is in hollow structure, and cross section is trapezoidal, metal
The front of shell 1 is provided with display screen 3, the integrated metal shell 1 of other several times, the conduct simultaneously of metal shell 1 here
The bonnet of the display screen 3, the back side of display screen 3, which is located at, has the circuit main board 31 being connected with display screen 3 in metal shell 1；Metal
A vertical fine crack 11 is offered on shell 1 in the opposite in the place face of display screen 3, the width of fine crack 11 is 2 millimeters, carefully
The length of seam 11 is λ/2, sets distributing point in the place apart from certain one end λ/10 of fine crack 11, the prevention at radio-frequency port of circuit main board 31 leads to
Cross coaxial feeder 4 and be connected to microstrip line 24, the other end of microstrip line 24 is connected to the second fed element 23, and the first fed element 25 connects
Ground strip, then the first fed element 25 and the second fed element 23 are fed with the side contacts of fine crack two respectively.
It is known that the relation of wavelength and frequency is reciprocal relation, specific calculation formula is：
λ=V/f
Wherein, V be electric wave transmission speed, i.e. 300000km/s
F is frequency, refers to the working frequency range of electric wave
Here Antenna Operation calculates corresponding wavelength λ in 2.4 conventional~2.5GHZ with centre frequency 2.45GHz,
Then wavelength here：λ=300000000/ (2.45*1000*1000*1000)=122mm.
Wherein, the wavelength in air corresponding to frequency of heart 2.45GHz is about λ=122mm.
But when antenna nearby has non-air medium, corresponding operation wavelength accordingly shortens, and excursion is about 80mm
Between~122mm.
The present embodiment has carried out emulation experiment, Fig. 7 and the result that Fig. 8 is emulation experiment to above-mentioned model：
In the figure 7,320MHz (S11 are reached from S11, the slot antenna device bandwidth<- 10dB, 2.35GHz~
2.67GHz), there is wider bandwidth characteristic.
And from Fig. 8 directional diagram result, on the face of fine crack 11, all directions spreadability is good, has
Preferable omni-directional.
The signal of mainboard prevention at radio-frequency port is accessed power feeding module 2 by the present embodiment by coaxial feeder 4, then passes through power feeding module
Two metal clips on 2 contact with distributing point both sides metal respectively to be fed, this to be used as middle biography by power feeding module 2
The operation that the mode of defeated part effectively prevent the directly welding coaxial feeder 4 on metal shell 1 (is welded relatively tired in bulk metal
It is difficult), make production and assembly become to facilitate it is feasible；
Secondly, the present embodiment realizes the built-in day on complete metal shell 1 by opening up fine crack 11 on metal shell 1
Line makes antenna with outer shell integrated, and whole metal shell 1 is used as into antenna, while preferable metal appearance is kept realize compared with
Good antenna performance.
Embodiment two
The present embodiment is similar with embodiment one, and difference is, first fed element 25 of the present embodiment and the second feed
Part 23 includes the through hole being opened on pcb board 21, and through hole is equipped with metallic screw, the side of the first distributing point 12 and the second feedback
13 sides of electricity point are provided with the metallic stud being adapted with metallic screw, and metallic screw includes screw rod and screw head, and screw rod plugs
Enter in metallic stud, and screw head is located at the opposite side of pcb board 21, the screw head of the second fed element 23 contacts with ground strip 22, and first
The screw head of fed element 25 separates with ground strip 22, and metallic screw plays electricity while pcb board 21 is fixed on metal shell 1
The effect of gas connection.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Although metal shell 1 has more been used herein；Fine crack 11；First distributing point 12；Second distributing point 13；Feed mould
Block 2；Pcb board 21；Ground strip 22；Second fed element 23；Microstrip line 24；First fed element 25；Metalized conductive through hole 26；It is conductive
Post 27；Display screen 3；Circuit main board 31；The grade term of coaxial feeder 4, but it is not precluded from the possibility using other terms.Use this
A little terms are used for the purpose of more easily describing and explaining the essence of the present invention；It is construed as any additional limitation
All disagreed with spirit of the present invention.
Claims (10)
1. a kind of slot antenna device, including metal shell (1), it is characterised in that offer one on described metal shell (1)
Bar fine crack (11), the both sides of fine crack (11) have the first distributing point (12) and the second distributing point (13) that are oppositely arranged, institute respectively
Fine crack (11) place is provided with a power feeding module (2) in the metal shell (1) stated, described power feeding module (2) includes a PCB
Plate (21) and the ground strip (22) on pcb board (21), there is the first fed element being oppositely arranged on described pcb board (21)
(25) and the second fed element (23), described the first fed element (25) are connected to the first distributing point (12), the described second feed
Part (23) is connected to the second distributing point (13), and described the first fed element (25) is located on ground strip (22) and ground strip (22)
It is connected, described the second fed element (23) is isolated with ground strip (22), and described the second fed element (23) is connected with one and set
The microstrip line (24) on pcb board (21) is put, the other end of described microstrip line (24), which has, to be used to connect coaxial feeder (4)
Pad.
2. slot antenna device according to claim 1, it is characterised in that described the first fed element (25) and the second feedback
Electric part (23) is metal clips.
3. slot antenna device according to claim 2, it is characterised in that there are two in described metal shell (1)
The groove being adapted with metal clips is spacing for being carried out to metal clips, and two grooves are located at the first distributing point (12) respectively
Side and the second distributing point (13) side.
4. slot antenna device according to claim 1, it is characterised in that described the first fed element (25) and the second feedback
Electric part (23) includes the through hole being opened on pcb board (21), and described through hole is equipped with metallic screw, the described first feedback
Electric point (12) side and the second distributing point (13) side is provided with the metallic stud being adapted with metallic screw.
5. according to the slot antenna device described in Claims 1-4 any one, it is characterised in that described pcb board (21) is
Double-layer PCB board (21), the front and back of double-layer PCB board (21) is equipped with ground strip (22), and is opened on double-layer PCB board (21)
Provided with multiple metalized conductive through holes (26) for being used to connect two layers of ground strip (22) up and down, and in metalized conductive through hole (26)
Through there is conductive pole (27).
6. slot antenna device according to claim 1, it is characterised in that described metal shell (1) is formed in one
Structure.
7. slot antenna device according to claim 6, it is characterised in that the width of described fine crack (11) be 1~
3mm, the length of fine crack (11) is (2 λ/5)~(3 λ/5), and λ is wavelength corresponding to the working frequency range of antenna.
8. slot antenna device according to claim 7, it is characterised in that described the first distributing point (12) and the second feedback
Electric point (13) is respectively positioned on apart from fine crack (11) one end (2 λ/25)~(3 λ/25) place.
9. a kind of terminal device, it is characterised in that including the slot antenna device described in claim 1-8 any one.
10. terminal device according to claim 9, it is characterised in that the metal shell (1) of described slot antenna device
It is trapezoidal hollow structure in cross section, display screen (3) is provided with one of surface of described metal shell (1), shows
Display screen (3) back side, which is located at, has the circuit main board (31) being connected with display screen (3) in metal shell (1), fine crack (11) is opened in
The opposite face in face, the prevention at radio-frequency port of described circuit main board (31) are connected to micro-strip by coaxial feeder (4) where display screen (3)
Line (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710839664.0A CN107732452A (en) | 2017-09-18 | 2017-09-18 | Slot antenna device and terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710839664.0A CN107732452A (en) | 2017-09-18 | 2017-09-18 | Slot antenna device and terminal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107732452A true CN107732452A (en) | 2018-02-23 |
Family
ID=61206328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710839664.0A Pending CN107732452A (en) | 2017-09-18 | 2017-09-18 | Slot antenna device and terminal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107732452A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557382A (en) * | 2018-11-30 | 2019-04-02 | 西安电子科技大学 | A kind of electromagnetic radiation measuring method |
| CN109557432A (en) * | 2018-11-30 | 2019-04-02 | 西安电子科技大学 | A kind of method for measurement of partial discharge |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005318333A (en) * | 2004-04-28 | 2005-11-10 | Nissei Electric Co Ltd | Antenna |
| CN201877568U (en) * | 2010-09-09 | 2011-06-22 | 萨基姆移动电话研发（宁波）有限公司 | Mobile phone antenna |
| CN202009069U (en) * | 2011-04-22 | 2011-10-12 | 深圳市三极天线技术有限公司 | Indoor coverage wide frequency antenna (WFA) |
| CN104269606A (en) * | 2014-10-24 | 2015-01-07 | 广东欧珀移动通信有限公司 | Mobile terminal antenna structure and mobile terminal |
-
2017
- 2017-09-18 CN CN201710839664.0A patent/CN107732452A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005318333A (en) * | 2004-04-28 | 2005-11-10 | Nissei Electric Co Ltd | Antenna |
| CN201877568U (en) * | 2010-09-09 | 2011-06-22 | 萨基姆移动电话研发（宁波）有限公司 | Mobile phone antenna |
| CN202009069U (en) * | 2011-04-22 | 2011-10-12 | 深圳市三极天线技术有限公司 | Indoor coverage wide frequency antenna (WFA) |
| CN104269606A (en) * | 2014-10-24 | 2015-01-07 | 广东欧珀移动通信有限公司 | Mobile terminal antenna structure and mobile terminal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557382A (en) * | 2018-11-30 | 2019-04-02 | 西安电子科技大学 | A kind of electromagnetic radiation measuring method |
| CN109557432A (en) * | 2018-11-30 | 2019-04-02 | 西安电子科技大学 | A kind of method for measurement of partial discharge |
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