CN106410380B - A mobile phone antenna with an inductively coupled monopole branch and a capacitively coupled loop branch - Google Patents
A mobile phone antenna with an inductively coupled monopole branch and a capacitively coupled loop branch Download PDFInfo
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- CN106410380B CN106410380B CN201610802456.9A CN201610802456A CN106410380B CN 106410380 B CN106410380 B CN 106410380B CN 201610802456 A CN201610802456 A CN 201610802456A CN 106410380 B CN106410380 B CN 106410380B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
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Abstract
The invention discloses the antenna for mobile phone that a kind of inductive coupling monopole branch adds capacitive coupling loop branch, including dielectric-slab, feed connection, microstrip feed line, radiation main line, inductive coupling monopole branch, capacitive coupling ring branch, short circuit nail and floors；Floor is located at the lower surface of dielectric-slab, and the floor trough opened on floor；Microstrip feed line, radiation main line, inductive coupling monopole branch and capacitive coupling ring branch are located at the upper surface of dielectric-slab, microstrip feed line is printed on the middle line of dielectric-slab, radiation main line is printed on the middle line of dielectric-slab, radiation main line is connect with microstrip feed line, and is radiated main line and be overlapped with microstrip feed line middle line；The apex drive needle of feed connection passes through dielectric-slab and connect with microstrip feed line, the outer conductor of feed connection is connect with floor surface, this antenna is made of inductive coupling monopole branch and capacitive coupling ring branch, in conjunction with the advantage of both structures of monopole and ring, under lesser size, the advantages that realizing multifrequency, the broadband, easy processing of antenna.
Description
Technical field
The present invention relates to radio arts, add capacitive coupling ring more particularly, to a kind of inductive coupling monopole branch
The antenna for mobile phone of road branch, antenna for mobile phone are covering 2G, 3G, 4G frequency range antenna for mobile phone.
Background technique
Although the history of mobile communication is not grown, it develops very rapid, the external hand of portable phone since most
Machine antenna-spiral external antenna, maintains communication efficiency with analog signal reluctantly；The finally appearance sum number of built-in PIFA antenna
The large-scale application of word signal, mobile communication, which initially enters, communicates the stable 2G epoch, but with the changes of the times, people couple
The requirement of mobile phone is also more and more.The function of only meeting basic communication can't reach the demand of people, and then the third generation moves
Dynamic multi-functional mobile phone and forth generation smart phone are also given birth to because needing.The quick variation of mobile communication, also leads to the fast of antenna for mobile phone
Violent advance develops towards the direction of small-sized, plane, multifrequency, broadband.
The conventional PIFA antenna in 2G epoch, be mostly it is three-dimensional, section is thicker, occupy volume it is bigger, meet not
Mobile phone small-sized, frivolous demand.And plane single pole sub antenna and loop antenna, demand can be reached very well.Because they are flat
Face, it is not take up mobile phone thickness substantially；And they are narrow microstrip lines, can be with bending folds, cabling is free, occupancy
Area is smaller；Most importantly their self-characteristics, can generate the mould of 0.25 wavelength, the mould of 0.5 wavelength, mould of 1 wavelength etc.
The mould of higher order, occupies little space, and is also able to achieve multifrequency covering, is able to satisfy the demand of each communications band of 2G, 3G, 4G.
Summary of the invention
The present invention faces the deficiency and disadvantage of prior art construction, provide a kind of miniaturization, multiband, easy processing inductance
The sub- branch of coupled monopole adds the Novel cell phone antenna of capacitive coupling loop branch.The antenna for mobile phone uses the monopole of inductive coupling
Sub- branch and capacitively coupled ring branch not only greatly reduce the occupied volume of radiation area, but also provide wider band
Width, can cover 4G basic communication frequency range (including LTE700, LTE800, GSM850, GSM900, LTE1700, GSM1800,
DCS, PCS, UMTS, also including WIFI(2.4G) frequency range and WIMAX frequency range (2.5G)).
In order to achieve the above object, the technical solution adopted by the present invention is that:
A kind of inductive coupling monopole branch adds the antenna for mobile phone of capacitive coupling loop branch, including dielectric-slab, further includes
Feed connection, microstrip feed line, radiation main line, inductive coupling monopole branch, capacitive coupling ring branch, short circuit nail and floor；
Wherein the floor is located at the lower surface of dielectric-slab, and floor trough is provided on floor；
Wherein the microstrip feed line, radiation main line, inductive coupling monopole branch and capacitive coupling ring branch are located at medium
The upper surface of plate, microstrip feed line are printed on the middle line of dielectric-slab, and radiation main line is printed on the middle line of dielectric-slab, radiate main line
It is connect with microstrip feed line, and radiates main line and be overlapped with microstrip feed line middle line；
The apex drive needle of feed connection passes through dielectric-slab and connect with microstrip feed line, the outer conductor and floor table of feed connection
Face connection；
Inductive coupling monopole branch is distributed in the side on radiation main line, and inlays patch electricity by three L-type minor matters, centre
The microstrip line of sense and a folding micro-strip composition；Wherein three L-type minor matters two microstrip lines vertically connect by one is long and the other is short and
At；
Wherein first L-type minor matters rotates clockwise 90 ° of placements, the long microstrip line of first L-type minor matters and radiation main line
Connection, short microstrip line are connect with the microstrip line one end for inlaying chip inductor；
Second L minor matters is rotated by 90 ° placement counterclockwise, there are gap between short microstrip line and radiation main line, and short micro-strip
Line is connected with the microstrip line other end for inlaying chip inductor, and long microstrip line connects third L-type minor matters；
Third L-type minor matters rotate clockwise 180 ° of placements, and long microstrip line connects second L-type minor matters, short microstrip line
Connection folds micro-strip；
It is placed longitudinally to fold micro-strip, folds micro-strip and is folded into stereo structure, be made of a vertical plane and two horizontal planes, one
A horizontal plane dielectric-slab upper surface and be connected with third L-type minor matters end, another horizontal plane is in dielectric-slab lower surface
Lower section；
The capacitive coupling ring branch is distributed in the other side on radiation main line, and by four L-type minor matters, a bending minor matters
With a square shaped microstrip composition；Wherein by one is long and the other is short, two microstrip lines are vertically formed by connecting four L-type minor matters；
The long microstrip line of first L-type minor matters is laterally disposed, and short microstrip line is placed longitudinally, and lateral long microstrip line and spoke
The connection of blackberry lily road, longitudinal short microstrip line vertically connects one end of a laterally disposed short microstrip line, this is laterally disposed short micro-
The band line other end is hanging, the opening direction radiation main line of first L-type minor matters；
Second L-type minor matters is rotated by 90 ° placement counterclockwise, and stays between first L-type minor matters in capacitive coupling ring branch
There is gap；Long microstrip line one end of second L-type minor matters is hanging, and one end of short microstrip line is connect with third L-type minor matters；
Third L-type minor matters rotate clockwise 180 ° of placements, the short microstrip line of third L-type minor matters and second L-type branch
The short microstrip line connection of section, the long microstrip line of third L-type minor matters are connect with the 4th L-type minor matters；
4th L-type minor matters rotate clockwise 90 ° of placements, the long microstrip line company of long microstrip line and third L-type minor matters
It connects, short microstrip line is connected with bending minor matters；
Bending minor matters are made of two U-shaped branch sections, and two U-shaped branch sections are all laterally disposed, an opening direction radiation
Main line, an opening backward radiation main line；One end of bending minor matters is connect with the short microstrip line of the 4th L-type minor matters, the other end
It is connected with square shaped microstrip；
Floor is connected by short circuit nail across dielectric-slab with square microstrip line.
Preferably, for the demand of impedance matching, the width on the radiation main line is greater than the width of microstrip feed line.
Preferably, the width of three L-type minor matters is equal in the inductive coupling monopole branch, and length is unequal；Capacitive
Three face width that micro-strip is folded in coupling ring branch are unequal, but the width of both greater than L-type minor matters.
The width of four L-type minor matters is unequal in the capacitive coupling ring branch, and length is unequal.
Preferably, the gap between described second L-type minor matters of capacitive coupling ring branch and first L-type minor matters is divided into cross
To gap and axial clearance, two gaps it is in different size.
Preferably, the dielectric-slab is the solid dielectric of FR4-epoxy material.
Preferably, the lower surface of the floor part overwrite media plate, so that there are as irradiation unit for dielectric-slab lower surface
The clearance zone divided.
Preferably, the floor trough positioned at dielectric-slab lower surface will pass through microstrip feed line from beneath.
Preferably, the length and width of described antenna for mobile phone each section are determined according to Antenna Operation frequency point and impedance matching requirements；Institute
The inductance value size for stating chip inductor is determined according to Antenna Operation frequency point and impedance matching requirements；The inductive coupling monopole branch
Gap size in road between the short microstrip line and radiation main line of second L minor matters is according to Antenna Operation frequency point and impedance matching requirements
It determines.
Compared with prior art, beneficial effect is:
1, this antenna can cover all basic communication frequency ranges of 4G, in the case where size limitation, still can have wider low
Frequency range and wider high-frequency band, low frequency can cover 700-1000Mhz, and high-frequency energy covers 1700-2700Mhz, but also covers
The GPS frequency range of 1200Ghz or so can satisfy the communication of present LTE smart phone.
2, this antenna is made of a radiation main line and two branches, and structure is easily understood, and cabling train of thought is clear, Er Qieshi
Planar structure, it is easy to manufacture there is no the stereogenic of too many flexing.
3, there is the frequency range of each Branch control in each branch, for low-frequency range, 0.25 wavelength mould shape of monopole sub-branch
At the frequency range of 750Mhz or so, 0.5 wavelength mould of ring branch forms the frequency range of 950Mhz or so, so adjusting monopole sub-branch
It is just adjustable the resonance of antenna 750Mhz or so, the resonance that ring branch is just adjustable antenna 950Mhz or so is adjusted, increases day
The freedom degree of line design.
4, common antenna for mobile phone is a kind of structure (monopole, PIFA or ring structure), and this antenna combines list
Extremely both structures of son and loop, it is relatively new in the design of structure, while the advantages of also gathered two kinds of structures -- monopole
Minor structure can reduce the volume of antenna, and ring structure can make antenna more stable, reduce extraneous interference and SAR value.Such day
The function of line is more stable and powerful.
5, the slot structure on antenna floor can further improve the impedance matching of antenna, the position of regulating tank and length and width,
The overall impedance that antenna can be changed accordingly, the direction that antenna can be allowed to want towards us adjust, and increase the control to antenna
Property.
Detailed description of the invention
Fig. 1 is the birds-eye view of this antenna；
Fig. 2 is the side view of this antenna；
Fig. 3 is the enlarged drawing of the monopole sub-branch folded portion of this antenna；
Fig. 4 is the return loss plot figure of this antenna；
Fig. 5 is the return loss plot comparison diagram of this antenna loading He non-loaded cable；
Fig. 6 is return loss plot comparison diagram when this antenna floor adds slot and no plus slot.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
In figure: 1- feed connection, 2- microstrip feed line, 3- radiation main line, first L in 4- inductive coupling monopole branch
Type minor matters, 5- chip inductor, second L-type minor matters in 6- inductive coupling monopole branch, 7- inductive coupling monopole branch
In third L-type minor matters, the folding micro-strip in 8- inductive coupling monopole branch, 8.1- fold micro-strip upper surface, 8.2- folding
Folded micro-strip side, 8.3- fold micro-strip lower surface, first L-type minor matters in 9- capacitive coupling ring branch, 10- capacitive coupling ring
Second L-type minor matters in branch, the third L-type minor matters in 11- capacitive coupling ring branch, in 12- capacitive coupling ring branch
The 4th L-type minor matters, the bending minor matters in 13- capacitive coupling ring branch, 14- pros shaped microstrip, 15- floor trough, 16- antenna
Long side, second L-type minor matters of 17- inductive coupling monopole branch and radiation main line obtain between gap, 18- capacitive coupling transverse direction
Gap, 19- capacitive coupling axial clearance, 20- dielectric-slab, 21- short circuit nail, the floor 22-.
A kind of inductive coupling monopole branch adds the Novel cell phone antenna of capacitive coupling loop branch, such as attached drawing 1 and Fig. 2 institute
Show, it further includes feed connection, microstrip feed line, radiation main line, inductive coupling monopole that antenna, which is planar structure, including dielectric-slab,
Branch, capacitive coupling ring branch, short circuit nail and floor；
In the present embodiment, the inductive coupling monopole branch, and inductance is inlayed by three L-type minor matters, centres
Microstrip line and fold micro-strip composition.Wherein first L-type minor matters rotates clockwise 90 ° of placements, and the length of first L-type minor matters is micro-
Band line is connect with radiation main line, and short microstrip line is connect with the microstrip line one end for inlaying chip inductor, total length 19mm；It inlays
The length of the microstrip line of chip inductor is 10mm；Second L minor matters is rotated by 90 ° placement counterclockwise, and short microstrip line and radiation are dry
There are gaps between road, and short microstrip line is connected with the microstrip line other end for inlaying chip inductor, and long microstrip line connects third L-type
Second L minor matters of minor matters, total length 22mm；Third L-type minor matters rotate clockwise 180 ° of placements, and long microstrip line connects
Second L-type minor matters, short microstrip line connection fold micro-strip, total length 18mm；Folded micro-strip is placed longitudinally, rolls over as shown in Fig. 3
Folded micro-strip is folded into stereo structure, is made of a vertical plane and two horizontal planes, a horizontal plane dielectric-slab upper surface and
It is connected with 7 end of third L-type minor matters, another horizontal plane is below dielectric-slab lower surface.The length of its shared plane is
18.5mm；The first, second, the width of three L-type minor matters and the width for inlaying the microstrip line of chip inductor are all 1mm, patch electricity
The inductance value of sense is 5nH, and the width that folded micro-strip paves into plane is 10mm, and the size of these branches is Antenna Impedance Matching
Value when being optimal.So the total length of inductive coupling monopole branch is 88mm, the low resonance point of formation is on the left side 750Mhz
The right side, and 0.25 times of vacuum wavelength for corresponding to 750Mhz is 107.5mm.Why length reduces, and is primarily due to inductive coupling
The reason of monopole branch joined inductance, inductance, which is added, can reduce electrical length.Therefore, inductive coupling monopole branch controls
The frequency range of this part 750Mhz in antenna low frequency, this point can observe current distributing figure of the antenna in 750Mhz to verify.
Above-mentioned chip inductor not only can reduce the electrical length of branch, also can effectively adjust the impedance of antenna, Fig. 5 is just
When being coilloading and not having coilloading, the S11 parameter of antenna increases low frequency and high frequency from the figure, it can be seen that inductance is added
Bandwidth.
In the present embodiment, the capacitive coupling ring branch is distributed in the other side on radiation main line, or by four L-type branches
The square shaped microstrip composition of section, a bending minor matters and one.The long microstrip line of first L-type minor matters is laterally disposed, dry with radiation
Road is connected, and short microstrip line is placed longitudinally, vertical one end for connecting a laterally disposed short microstrip line, the laterally disposed short micro-strip
The line other end is hanging, and the opening of first L-type minor matters is towards radiation main line, and the length is 24mm, width 1mm；Second L-type
Minor matters are rotated by 90 ° placement counterclockwise, and there are gaps between first L-type minor matters in capacitive coupling ring branch.Second L-type branch
Long microstrip line one end of section is hanging, and one end of short microstrip line is connect with third L-type minor matters, and the length is 22.2mm, width is
2mm；Third L-type minor matters rotate clockwise 180 ° of placements, the short microstrip line of third L-type minor matters and second L-type minor matters
Short microstrip line connection, the long microstrip line of third L-type minor matters are connect with the 4th L-type minor matters, and the length is 19mm, width
1.5mm；4th L-type minor matters rotate clockwise 90 ° of placements, and long microstrip line is connect with the long microstrip line of third L-type minor matters,
Its short microstrip line is connected with bending minor matters, and the length is 15.8mm, width is respectively 1mm and 0.5mm；Being bent minor matters length is
15.6mm, width 0.5mm, the side length of square shaped microstrip are 2mm, and the size of these same branches is provided to adapt to optimal
Impedance matching.So its capacitive coupling ring branch total length is about 99mm, the low resonance point of formation is in 950Mhz or so.It is corresponding
950Mhz 0.5 times of vacuum wavelength be 157mm, why length is small so more, and one side electromagnetic wave is on dielectric-slab
Wavelength is less than vacuum wavelength, is on the other hand bent the effect that branch plays inductance, indirectly reduces electrical length.Therefore ring
Branch controls the frequency range of this part 950Mhz in antenna low frequency, and this point can observe current distribution of the antenna in 950Mhz
Figure is verified.
Floor is connected by short circuit nail across dielectric-slab with square microstrip line.
In the present embodiment, the dielectric-slab length is 120mm, width 60mm, is highly 0.8mm, relative medium
Constant is 4.4.Above-mentioned floor length is 99mm, and width 60mm, slot length therein is 38mm, width 2mm.This slot
The GPS frequency range of 1220Mhz or so is produced, this can also observe antenna in the current distributing figure of 1220Mhz.(from figure
In it is known that, have a large amount of current convergence near floor trough at this frequency point)；And impedance matching of this slot to antenna
It plays a significantly greater role, it is seen that, has added floor trough from Fig. 6, two resonance points of antenna low-frequency range is made to be connected in one
It rises, increases the bandwidth of low frequency, while greatly improved the impedance of high band, also increase the bandwidth of high band.
The foregoing is merely an example of the present invention, are not intended to limit the scope of the invention, all to utilize this
Equivalent structure made by description of the invention and accompanying drawing content or process transformation, are applied directly or indirectly in other relevant technologies
Field is included within the scope of the present invention.
Claims (3)
1. a kind of inductive coupling monopole branch adds the antenna for mobile phone of capacitive coupling loop branch, including dielectric-slab, feature exists
In, further include feed connection, microstrip feed line, radiation main line, inductive coupling monopole branch, capacitive coupling ring branch, short circuit nail
The floor and；
Wherein the floor is located at the lower surface of dielectric-slab, and the floor trough opened on floor；
Wherein the microstrip feed line, radiation main line, inductive coupling monopole branch and capacitive coupling ring branch are located at dielectric-slab
Upper surface, microstrip feed line are printed on the longitudinal midline of dielectric-slab, and radiation main line is printed on the longitudinal midline of dielectric-slab, are radiated
Main line is connect with microstrip feed line, and is radiated main line and be overlapped with microstrip feed line middle line；
The apex drive needle of feed connection passes through dielectric-slab and connect with microstrip feed line, and the outer conductor and floor surface of feed connection connect
It connects；
Inductive coupling monopole branch is distributed in the side on radiation main line, and inlays chip inductor by three L-type minor matters, centre
Microstrip line and a folding micro-strip composition；Wherein by one is long and the other is short, two microstrip lines are vertically formed by connecting three L-type minor matters；
Wherein first L-type minor matters rotates clockwise 90 ° of placements, and the long microstrip line of first L-type minor matters is vertical with radiation main line
Connection, the short microstrip line microstrip line for connecting and inlaying chip inductor vertical with the microstrip line one end for inlaying chip inductor are located at short micro-
Horizontal right side with line；
Second L minor matters is rotated by 90 ° placement counterclockwise, there are gap between short microstrip line and radiation main line, and short microstrip line with
The microstrip line other end for inlaying chip inductor is connected, and long microstrip line connects third L-type minor matters；
Third L-type minor matters rotate clockwise 180 ° of placements, and long microstrip line connects second L-type minor matters, short microstrip line connection
Fold micro-strip；
It is placed longitudinally to fold micro-strip, folds micro-strip and is folded into stereo structure, be made of a vertical plane and two horizontal planes, a water
Plane dielectric-slab upper surface and be connected with third L-type minor matters end, another horizontal plane is below dielectric-slab lower surface；
The capacitive coupling ring branch is distributed in the other side on radiation main line, and by four L-type minor matters, a bending minor matters and one
A pros' shaped microstrip composition；Wherein by one is long and the other is short, two microstrip lines are vertically formed by connecting four L-type minor matters；
The long microstrip line of first L-type minor matters is laterally disposed, and short microstrip line is longitudinal to be placed downwards, and lateral long microstrip line and spoke
The connection of blackberry lily road, longitudinal short microstrip line vertically connects one end of a laterally disposed short microstrip line, this is laterally disposed short micro-
The band line other end is hanging, the opening direction radiation main line of first L-type minor matters；
Second L-type minor matters is rotated by 90 ° placement counterclockwise, and between first L-type minor matters in capacitive coupling ring branch there are
Gap；Long microstrip line one end of second L-type minor matters is hanging, and one end of short microstrip line is connect with third L-type minor matters；
Third L-type minor matters rotate clockwise 180 ° of placements, the short microstrip line of third L-type minor matters and second L-type minor matters
Short microstrip line connection, the long microstrip line of third L-type minor matters are connect with the 4th L-type minor matters；
4th L-type minor matters rotate clockwise 90 ° of placements, and long microstrip line is connect with the long microstrip line of third L-type minor matters,
Short microstrip line is connected with bending minor matters；
Bending minor matters are made of two U-shaped branch sections, and two U-shaped branch sections are all laterally disposed, an opening direction radiation main line,
One opening backward radiation main line；One end of bending minor matters is connect with the short microstrip line of the 4th L-type minor matters, the other end and pros
Shaped microstrip is connected；
Floor is connected by short circuit nail across dielectric-slab with square microstrip line.
2. antenna for mobile phone according to claim 1, which is characterized in that for the demand of impedance matching, the radiation main line
Width be greater than microstrip feed line width.
3. antenna for mobile phone according to claim 1, which is characterized in that three L-types in the inductive coupling monopole branch
The width of minor matters is equal, and length is unequal；Three face width that micro-strip is folded in inductive coupling monopole branch are unequal, but all
Greater than the width of L-type minor matters；
The width of four L-type minor matters is unequal in the capacitive coupling ring branch, and length is unequal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610802456.9A CN106410380B (en) | 2016-09-05 | 2016-09-05 | A mobile phone antenna with an inductively coupled monopole branch and a capacitively coupled loop branch |
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| CN201610802456.9A CN106410380B (en) | 2016-09-05 | 2016-09-05 | A mobile phone antenna with an inductively coupled monopole branch and a capacitively coupled loop branch |
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| CN108511892B (en) * | 2018-02-28 | 2020-04-03 | 哈尔滨工程大学 | Compact multi-band antenna |
| CN109301476B (en) * | 2018-11-21 | 2023-12-01 | 深圳市信维通信股份有限公司 | Flat LTE (Long term evolution) ultra-wideband antenna with metal back cover |
| CN109378586B (en) * | 2018-11-28 | 2021-01-29 | 英业达科技有限公司 | Multi-feed antenna |
| CN110350272A (en) * | 2019-07-02 | 2019-10-18 | 湖南赛博诺格电子科技有限公司 | A kind of 90 ° of phase shifters of mode transmission miniaturization |
| CN110600839B (en) | 2019-09-18 | 2021-09-21 | 京东方科技集团股份有限公司 | Control substrate, liquid crystal phase shifter and manufacturing method of control substrate |
| CN110635234A (en) * | 2019-09-24 | 2019-12-31 | 环鸿电子（昆山）有限公司 | Antenna structure |
| CN111478039B (en) * | 2020-05-26 | 2024-11-12 | 中国电子科技集团公司第五十四研究所 | A miniaturized dual-band PIFA antenna and a compact combined antenna |
| CN111613890B (en) * | 2020-06-11 | 2023-07-14 | 维沃移动通信有限公司 | Antenna structure and electronic equipment |
| CN112787091B (en) * | 2020-12-30 | 2022-10-11 | 北京微芯区块链与边缘计算研究院 | Antenna circuit based on pi-type distributed matching sub-circuit |
| CN113285221B (en) * | 2021-05-21 | 2024-03-22 | 昆山睿翔讯通通信技术有限公司 | Broadband terminal antenna and mobile terminal |
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| Publication number | Publication date |
|---|---|
| CN106410380A (en) | 2017-02-15 |
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