CN209249688U - Three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna - Google Patents
Three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna Download PDFInfo
- Publication number
- CN209249688U CN209249688U CN201822048078.7U CN201822048078U CN209249688U CN 209249688 U CN209249688 U CN 209249688U CN 201822048078 U CN201822048078 U CN 201822048078U CN 209249688 U CN209249688 U CN 209249688U
- Authority
- CN
- China
- Prior art keywords
- cantor
- gap
- mirror image
- fractal dipole
- gap fractal
- Prior art date
- 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
Links
Abstract
The utility model relates to three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antennas, including the three-layer thin-film matrix from top to bottom set gradually, first layer film matrix front and third layer film matrix front are covered with mirror image Cantor gap fractal dipole induced radiation patch, second layer film matrix front is covered with mirror image Cantor gap fractal dipole feed radiation patch, the third layer film matrix back side is covered with barium titanate thin slice, the permalloy coating that the barium titanate thin slice back side is covered with, this antenna: structure is simple, design is reasonable, it is preferable to shield outside electromagnetic interference effect, radianting capacity is strong, performance redundancy is larger, it being capable of steady operation in wider frequency range, the second generation can be completely covered to the 5th third-generation mobile communication frequency range, radio frequency identification frequency range, ultra-wideband communications frequency range and mobile digital TV frequency range.
Description
Technical field
The utility model relates to a kind of three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antennas.
Background technique
More net unifications, multi-functional fusion are the most important trend of wireless communication technique development.Microwave frequency band nets unification more
The antenna of intelligent hand-held terminal needs to be completely covered the second generation to the 5th third-generation mobile communication frequency range, radio-frequency recognition system work frequency
Section, radio ultra wide band system working frequency range, mobile digital TV system working frequency range.China's Generation Mobile Telecommunication System frequency used at present
Section is 0.905~0.915 GHz of GSM standard, 0.950~0.960 GHz, 1.710~1.785 GHz, 1.805~1.880
Ghz band；3G (Third Generation) Moblie frequency range be 1.880~1.920 GHz of TD-SCDMA standard, 2.010~2.025 GHz,
1.920~1.980 GHz of 2.300~2.400 ghz bands and WCDMA standard, 2.110~2.170 ghz bands；Forth generation
Mobile communication frequency range is 2.570~2.620 ghz band of TD-LTE standard.The 5th third-generation mobile communication that will be come into operation has
Three candidate frequency ranges, are respectively as follows: 3.300~3.400 GHz, 4.400~4.500 GHz, 4.800~4.990 GHz.Radio frequency is known
There are three main working frequency range for other system: 0.902~0.928 GHz, 2.400~2.4835 GHz, 5.725~5.875
GHz.The working frequency range of radio ultra wide band system is 3.100~10.600 GHz.Mobile digital TV system working frequency range is 11.700
~12.200 GHz.The antenna of the more net in-one intelligent handheld terminals of microwave frequency band needs while covering above-mentioned all working frequency range,
And meet the requirement that radianting capacity is strong, performance redundancy is larger, job stability is high, while outside electromagnetic interference can be shielded, it puts
It can still work normally when being placed near a variety of radio-frequency signal sources.
Summary of the invention
The purpose of this utility model is the defect and deficiency for traditional bag cage, provides a kind of three-dimensional mirror image Cantor gap
Fractal dipole ultra-wide band antenna.
The utility model solves scheme used by technical problem, a kind of three-dimensional mirror image Cantor gap fractal dipole
Ultra-wide band antenna, including the three-layer thin-film matrix from top to bottom set gradually, first layer film matrix front and third layer are thin
Membrane matrix front is covered with mirror image Cantor gap fractal dipole induced radiation patch, and second layer film matrix front pastes
There is mirror image Cantor gap fractal dipole to feed radiation patch, the third layer film matrix back side is covered with barium titanate thin slice, titanium
The permalloy coating that the sour barium thin slice back side is covered with.
Further, shape is divided in mirror image Cantor gap fractal dipole induced radiation patch and mirror image Cantor gap
Dipole feed radiation patch structure is completely the same, all by two symmetrical Cantor gap fractal dipole radiation arms and lower section
Mirror compensated structure composition.
Further, the Cantor gap fractal dipole radiation arm is ± 0.1 mm of 1 mm, width 0.5 by length
The feeder line of ± 0.01 mm of mm and Cantor gap Fractal Region domain composition, the size in Cantor gap Fractal Region domain be 18 mm ±
0.1 mm×18 mm±0.1 mm。
Further, the Cantor gap Fractal Region domain in the Cantor gap fractal dipole radiation arm is using at least
The Cantor gap fractal structure of 2 ranks.
Further, the mirror compensated structure and two Cantor gap fractal dipole radiation arms are in mirror symmetry,
Mirror compensated structure is ± 0.1 mm of 1 mm at a distance from the fractal dipole radiation arm of Cantor gap.
Further, the mirror image Cantor gap fractal dipole feed radiation patch two radiation arms it is symmetrical in
Open gap is offered on heart line, is equipped with antenna feed point in the two sides of open gap.
Further, three-layer thin-film matrix structure is consistent, is all polyethylene terephthalate thin film matrix, shape is
Rectangle, size are ± 0.1 mm of ± 0.1 mm of mm × 39 of 40 mm, and with a thickness of ± 0.02 mm of 0.2 mm, relative dielectric constant is
3.5±0.1。
Further, the barium titanate thin slice is microwave frequency band low-loss barium titanate thin slice, and shape is rectangle, and size is
± 0.1 mm of ± 0.1 mm of mm × 39 of 40 mm, with a thickness of ± 0.1 mm of 0.3 mm, relative dielectric constant is 100 ± 5.
Further, the size of the permalloy coating is identical as the size of barium titanate thin slice, and permalloy used is
By 78% nickel, 21% iron, 1% niobium, tantalum, titanium, aluminium composition high rigidity high magnetic permeability permalloy.
Further, shape is divided in mirror image Cantor gap fractal dipole induced radiation patch and mirror image Cantor gap
Dipole feed radiation patch is printed by graphene conductive ink.
Compared with prior art, the utility model has the following beneficial effects: structure is simple, rationally, shielding is extraneous for design
Electromagnetic interference effect is preferable, and radianting capacity is strong, and performance redundancy is larger, in wider frequency range can steady operation, can
The second generation is completely covered to the 5th third-generation mobile communication frequency range, radio frequency identification frequency range, ultra-wideband communications frequency range and mobile digital TV
Frequency range.
Detailed description of the invention
The utility model patent is further illustrated with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram of this antenna；
Fig. 2 is the structural schematic diagram of mirror image Cantor gap fractal dipole induced radiation patch；
Fig. 3 is the Cantor gap fractal structure schematic diagram of 0 rank；
Fig. 4 is the Cantor gap fractal structure schematic diagram of 1 rank；
Fig. 5 is the Cantor gap fractal structure schematic diagram of 2 ranks；
Fig. 6 is the return loss (S of this antenna11) performance map.
In figure:
1- film matrix；2- barium titanate thin slice；3- permalloy coating；The induction of 4- mirror image Cantor gap fractal dipole
Radiation patch；5- mirror image Cantor gap fractal dipole feeds radiation patch.
Specific embodiment
The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, a kind of three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna, including from top to bottom according to
The three-layer thin-film matrix of secondary setting, first layer film matrix front and third layer film matrix front are covered with mirror image Cantor
Gap fractal dipole induced radiation patch, second layer film matrix front are covered with the feedback of mirror image Cantor gap fractal dipole
Electric radiation patch, the third layer film matrix back side are covered with barium titanate thin slice, the permalloy that the barium titanate thin slice back side is covered with
Coating.
In the present embodiment, mirror image Cantor gap fractal dipole induced radiation patch and mirror image Cantor gap
Fractal dipole feed radiation patch structure it is completely the same, all by two symmetrical Cantor gap fractal dipole radiation arms with
The mirror compensated structure composition of lower section.
Mirror image Cantor gap fractal dipole induced radiation patch and mirror image Cantor gap fractal dipole feed spoke
The structure for penetrating patch is as shown in Figure 2.Mirror compensated structure is a kind of using induced radiation principle, improves dipole antenna radiation
The improvement structure of energy.The feed radiation arm of mirror compensated structure size structure and antenna is completely the same.If antenna nearby exists
Metallic conductor, for metallic conductor because the effect of the electromagnetic field generated by antenna will evoke electric current, this induced current also can be in space
Excitation electromagnetic field can be called secondary field.The field of space any point is all the field that directly excites of antenna to be superimposed with secondary field.
When dipole length determines, as long as rationally adjusting active dipole at a distance from mirror compensated structure, so that it may make mirror compensated
The electric current on electric current and active dipole antenna arm in structure has same or similar phase.At this moment, the field of space any point
It is all the in-phase stacking of the secondary field of field and the excitation of mirror compensated structure that antenna directly excites, the radiance of antenna will obtain
Biggish raising.In mirror image Cantor gap fractal dipole feed radiation patch, plane mirror compensated structure can have
Effect improves the radiation intensity of dipole radiation arm.Mirror image Cantor gap fractal dipole is fed above and below radiation patch
Two pieces of mirror image Cantor gap fractal dipole induced radiation patches can be regarded as the mirror compensated structure in three-dimensional space, it
Further enhance the radianting capacity of antenna entirety.
In the present embodiment, the Cantor gap fractal dipole radiation arm is ± 0.1 mm of 1 mm, width by length
It is formed for the feeder line of ± 0.01 mm of 0.5 mm and Cantor gap Fractal Region domain, the size in Cantor gap Fractal Region domain is 18
mm±0.1 mm×18 mm±0.1 mm。
In the present embodiment, the Cantor gap Fractal Region domain in the Cantor gap fractal dipole radiation arm uses
The Cantor gap fractal structure of at least 2 ranks.
Cantor gap divides the iteration rule of shape as shown in Fig. 3-4 of Figure of description.The initial of shape is divided in Cantor gap
Structure is square, is divided into 6 row, 6 column, 36 small squares, the 2nd row the 2nd column, the 2nd row the 3rd column, the 2nd row the 5th are arranged,
3rd row the 3rd column, the 3rd row the 4th arrange, the 3rd row the 5th column, the 4th row the 2nd column, the 4th row the 3rd column, the 4th row the 4th column, the 5th row the 2nd arrange,
Totally 12 small squares are cut out for 5th row the 4th column, the 5th row the 5th column, are formed a Cantor fractal gap, are left 24 equal parts
Square area then obtains 1 rank Cantor gap fractal structure.By 24 square regions of 1 rank Cantor gap fractal structure
Cantor gap fractal iteration is done in domain again respectively, then obtains 2 rank Cantor gap fractal structures.Continue to change according to the method
High-order Cantor gap fractal structure then can be obtained in generation.Cantor gap fractal structure can not change the original radiation of antenna
In the case where patch global shape, by cracking inside aerial radiation patch, introducing divides deformation law, fractal structure from
Similitude can make have equally distributed radio-frequency current inside aerial radiation patch, guarantee that antenna has excellent broadband operation
Performance.
In the present embodiment, the mirror compensated structure and two Cantor gap fractal dipole radiation arms are in mirror image pair
Claim, mirror compensated structure is ± 0.1 mm of 1 mm at a distance from the fractal dipole radiation arm of Cantor gap.
In the present embodiment, pair of two radiation arms of mirror image Cantor gap fractal dipole feed radiation patch
Claim to offer open gap on center line, is equipped with antenna feed point in the two sides of open gap.
In the present embodiment, three-layer thin-film matrix structure is consistent, is all polyethylene terephthalate thin film matrix, shape
Shape is rectangle, and size is ± 0.1 mm of ± 0.1 mm of mm × 39 of 40 mm, and with a thickness of ± 0.02 mm of 0.2 mm, opposite dielectric is normal
Number is 3.5 ± 0.1.The chemical stability of polyethylene terephthalate (PET) film is very good, can be with oil resistant, resistance to diluted acid, resistance to
Diluted alkaline, resistance to most of solvents can work normally within the temperature range of -70 DEG C to 150 DEG C, use it as antenna matrix
Material, it is ensured that antenna has stable physics and chemical property.
In the present embodiment, the barium titanate thin slice is microwave frequency band low-loss barium titanate thin slice, and shape is rectangle, ruler
Very little is ± 0.1 mm of ± 0.1 mm of mm × 39 of 40 mm, and with a thickness of ± 0.1 mm of 0.3 mm, relative dielectric constant is 100 ± 5.Titanium
Sour barium is a kind of strong dielectric compound with high dielectric constant and low-dielectric loss, is capable of forming effective electric field shielding layer,
Prevent interference of the external electrical field to aerial radiation.
In the present embodiment, the size of the permalloy coating is identical as the size of barium titanate thin slice, and perm used closes
Gold be by 78% nickel, 21% iron, 1% niobium, tantalum, titanium, aluminium composition high rigidity high magnetic permeability permalloy, have both high hard
Degree and high magnetic permeability, can effectively shield influence of the external magnetic field to aerial radiation, and provide mechanical protection for antenna structure.It will
Barium titanate thin slice can effectively prevent antenna ambient electromagnetic field to aerial radiation together with permalloy electroplated coating combination
Interference guarantees that antenna has and relatively resists surrounding electromagnetic signal interference performance by force.
In the present embodiment, mirror image Cantor gap fractal dipole induced radiation patch and mirror image Cantor gap
Fractal dipole feed radiation patch is printed by graphene conductive ink.Graphene has very high electron mobility, system
It is big to be made the radio-frequency current intensity that can pass through after conductive ink, with graphene conductive ink printed antenna radiation patch, Ke Yizeng
The radio-frequency current intensity of strong inner antenna, improves aerial radiation intensity.Graphene conductive ink is free of metal, printed antenna radiation
Corrosion can be effectively prevented in patch.
From fig. 6, it can be seen that measured result is shown, the working band range of this antenna is 0.446~17.038 GHz,
Bandwidth of operation is 16.592 GHz, and bandwidth octave is 38.2, is below -10 in entire working band internal antenna return loss
DB, return loss minimum value are -47.92 dB.This radome outside electromagnetic interference effect is preferable, is placed on radiofrequency signal
When near source, it can still work normally.This radome outside electromagnetic interference effect is preferable, and radianting capacity is strong, and performance is superfluous
It is remaining larger, in wider frequency range can steady operation, can be completely covered the second generation to the 5th third-generation mobile communication frequency range,
Radio frequency identification frequency range, ultra-wideband communications frequency range and mobile digital TV frequency range can be widely applied for microwave frequency band and net unification more
In system.
This antenna designs dipole antenna radiation arm using high-order Cantor gap fractal structure, is cracked by iteration
It is introduced inside aerial radiation patch and divides deformation law, guarantee that antenna has the work of ultra-wide using the self-similarity of fractal structure
Make frequency range；The radiation in-phase stacking of plane mirror image collocation structure and aerial radiation arm, effectively improves the radiance of antenna；
The mirror compensated structure that two pieces of induced radiation patches above and below radiation patch are formed in three-dimensional space is fed, is further increased
The strong radianting capacity of antenna entirety.
Antenna measured result shows that the working band range of this antenna is 0.446~17.038 GHz, and bandwidth of operation is
16.592 GHz, bandwidth octave are 38.2, are below -10 dB, return loss in entire working band internal antenna return loss
Minimum value is -47.92 dB.This radome outside electromagnetic interference effect is preferable, when being placed near radio-frequency signal source, still
It can so work normally.Measured result shows that this antenna completely covers 0.902~0.928 GHz, 0.905~0.915
GHz, 0.950~0.960 GHz, 1.710~1.785 GHz, 1.805~1.880 GHz, 1.880~1.920 GHz, 1.920
~1.980 GHz, 2.010~2.025 GHz, 2.110~2.170 GHz, 2.300~2.400 GHz, 2.400~2.4835
GHz, 2.570~2.620 GHz, 3.300~3.400 GHz, 4.400~4.500 GHz, 4.800~4.990 GHz, 5.725
The second generations such as~5.875 GHz, 3.100~10.600 GHz, 11.700~12.200 GHz are all to the 5th third-generation mobile communication
Standard all working frequency range, radio frequency identification frequency range, ultra-wideband communications frequency range and mobile digital TV frequency range.
With for mobile communication system, radio-frequency recognition system, ultra-wideband communication system, mobile digital TV system routine
Antenna compares, this antenna has the advantages that prominent and significant effect: external electromagnetic of this antenna to entire microwave frequency band
Interference signal has preferable shield effectiveness, and the work of antenna not will receive the influence of radio-frequency signal source；The work of this antenna
Bandwidth is more than 16 GHz, and bandwidth octave has ultrabroad band ability to work very outstanding close to 40；This antenna is working
Most of region in frequency band, return loss value are below -40 dB, and return loss minimum value is down to -47.92 dB, echo damage
Consumption value fluctuates very little, and antenna radiation performance is reliable and stable, and antenna has sufficient performance redundancy.
Above-listed preferred embodiment has been further described the purpose of this utility model, technical solution and advantage,
It should be understood that the above is only the preferred embodiment of the utility model only, it is not intended to limit the utility model, it is all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in practical
Within novel protection scope.
Claims (10)
1. a kind of three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna, it is characterised in that: including from top to bottom according to
The three-layer thin-film matrix of secondary setting, first layer film matrix front and third layer film matrix front are covered with mirror image Cantor
Gap fractal dipole induced radiation patch, second layer film matrix front are covered with the feedback of mirror image Cantor gap fractal dipole
Electric radiation patch, the third layer film matrix back side are covered with barium titanate thin slice, the permalloy that the barium titanate thin slice back side is covered with
Coating.
2. three-dimensional mirror image Cantor gap according to claim 1 fractal dipole ultra-wide band antenna, it is characterised in that:
Mirror image Cantor gap fractal dipole induced radiation patch and mirror image Cantor gap fractal dipole feed radiation patch
Chip architecture is completely the same, all by the mirror compensated structure group of two symmetrical Cantor gap fractal dipole radiation arms and lower section
At.
3. three-dimensional mirror image Cantor gap according to claim 2 fractal dipole ultra-wide band antenna, it is characterised in that:
The feedback that the Cantor gap fractal dipole radiation arm is ± 0.1 mm of 1 mm by length, width is ± 0.01 mm of 0.5 mm
Line and Cantor gap Fractal Region domain composition, the size in Cantor gap Fractal Region domain be ± 0.1 mm of mm × 18 of 18 mm ±
0.1 mm。
4. three-dimensional mirror image Cantor gap according to claim 3 fractal dipole ultra-wide band antenna, it is characterised in that:
Cantor gap Fractal Region domain in the Cantor gap fractal dipole radiation arm is divided using the Cantor gap of at least 2 ranks
Shape structure.
5. three-dimensional mirror image Cantor gap according to claim 2 fractal dipole ultra-wide band antenna, it is characterised in that:
The mirror compensated structure is in mirror symmetry, mirror compensated structure and health support with two Cantor gap fractal dipole radiation arms
The distance of your gap fractal dipole radiation arm is ± 0.1 mm of 1 mm.
6. three-dimensional mirror image Cantor gap according to claim 2 fractal dipole ultra-wide band antenna, it is characterised in that:
Disconnection is offered in the symmetrical center line of two radiation arms of mirror image Cantor gap fractal dipole feed radiation patch
Gap is equipped with antenna feed point in the two sides of open gap.
7. three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna described in -6 any one according to claim 1,
It is characterized by: three-layer thin-film matrix structure is consistent, and it is all polyethylene terephthalate thin film matrix, shape is rectangle,
Size is ± 0.1 mm of ± 0.1 mm of mm × 39 of 40 mm, with a thickness of ± 0.02 mm of 0.2 mm, relative dielectric constant is 3.5 ±
0.1。
8. three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna described in -6 any one according to claim 1,
It is characterized by: the barium titanate thin slice is microwave frequency band low-loss barium titanate thin slice, shape is rectangle, and size is 40 mm
± 0.1 mm of the mm of ± 0.1 mm × 39, with a thickness of ± 0.1 mm of 0.3 mm, relative dielectric constant is 100 ± 5.
9. three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna described in -6 any one according to claim 1,
It is characterized by: the size of the permalloy coating is identical as the size of barium titanate thin slice.
10. three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna described in -6 any one according to claim 1,
It is characterized by: mirror image Cantor gap fractal dipole induced radiation patch and mirror image Cantor gap fractal dipole
Feed radiation patch is printed by graphene conductive ink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822048078.7U CN209249688U (en) | 2018-12-07 | 2018-12-07 | Three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822048078.7U CN209249688U (en) | 2018-12-07 | 2018-12-07 | Three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209249688U true CN209249688U (en) | 2019-08-13 |
Family
ID=67531934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822048078.7U Expired - Fee Related CN209249688U (en) | 2018-12-07 | 2018-12-07 | Three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209249688U (en) |
-
2018
- 2018-12-07 CN CN201822048078.7U patent/CN209249688U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ban et al. | A dual-loop antenna design for hepta-band WWAN/LTE metal-rimmed smartphone applications | |
| TWI451631B (en) | Multiband antenna and method for an antenna to be capable of multiband operation | |
| TWI652859B (en) | Antenna structure | |
| Lu et al. | Small-size octaband monopole antenna in an LTE/WWAN mobile phone | |
| CN104103897B (en) | A kind of compact ultra-wideband antenna based on L-type parasitism band | |
| Chen et al. | Small‐size 11‐band LTE/WWAN/WLAN internal mobile phone antenna | |
| An et al. | A simple planar antenna for sub-6 GHz applications in 5G mobile terminals | |
| Chen et al. | Wideband monopole antenna coupled with a chip‐inductor‐loaded shorted strip for LTE/WWAN mobile handset | |
| Wong et al. | Wideband surface‐mount chip antenna for eight‐band LTE/WWAN slim mobile phone application | |
| CN209249690U (en) | Three-dimensional mirror image drum gap fractal dipole ultra-wide band antenna | |
| Man et al. | Ultra-wideband planar inverted-F antennas with cut-etched ground plane | |
| CN209249688U (en) | Three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna | |
| Lin et al. | Simple monopole slot antenna for WWAN/LTE handset application | |
| CN109390687A (en) | Three-dimensional mirror image Cantor gap fractal dipole ultra-wide band antenna and terminal | |
| CN209088071U (en) | A kind of three-dimensional mirror image cross gap fractal dipole ultra-wide band antenna | |
| CN108417979A (en) | The compound ultra-wide band antenna of strong anti-interference type | |
| CN209249689U (en) | Three-dimensional mirror image rectangle nesting-Cantor composite fractal slot antenna | |
| Wong et al. | Small‐size wideband monopole antenna closely coupled with a chip‐inductor–loaded shorted strip for 11‐band WWAN/WLAN/WiMAX operation in the slim mobile phone | |
| CN209088062U (en) | A kind of three-dimensional mirror image Hilbert fractal dipole ultra-wide band antenna | |
| Hiraguri et al. | A wideband antenna with fan-shaped and trapezoidal elements on printed circuit board for ultra wideband radio | |
| CN207967293U (en) | The nested fractal ring dipole-compound ultra-wide band antenna structure of complementary crevices | |
| CN109411887A (en) | Three-dimensional mirror image drum gap fractal dipole ultra-wide band antenna and terminal | |
| CN209088063U (en) | A kind of three-dimensional mirror image tree fractal ring dipole ultra-wide band antenna | |
| Wong et al. | WWAN/LTE handset antenna with shaped circuit board, battery, and metal midplate | |
| Li et al. | A LTE smartphone antenna with an internal matching circuit to cover 698–2710 MH z |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190813 Termination date: 20211207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |