CN108539331A - The phased array antenna of Terahertz fluting phase-shifting unit and its composition based on liquid crystal - Google Patents
The phased array antenna of Terahertz fluting phase-shifting unit and its composition based on liquid crystal Download PDFInfo
- Publication number
- CN108539331A CN108539331A CN201810330867.1A CN201810330867A CN108539331A CN 108539331 A CN108539331 A CN 108539331A CN 201810330867 A CN201810330867 A CN 201810330867A CN 108539331 A CN108539331 A CN 108539331A
- Authority
- CN
- China
- Prior art keywords
- phase
- layer
- liquid crystal
- medium substrate
- shifting unit
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/18—Phase-shifters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/18—Phase-shifters
- H01P1/184—Strip line phase-shifters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
Abstract
The phased array antenna of the Terahertz fluting phase-shifting unit and its composition that the invention discloses a kind of based on liquid crystal, phase-shifting unit of slotting includes upper and lower two layer medium substrate, it is injected with liquid crystal layer in the gap of upper and lower two layer medium substrate, it is equipped with metal micro-strip patch electrode on the downside of upper layer medium substrate, wire ground electrode is equipped on the upside of layer dielectric substrate；Metal micro-strip patch electrode includes metal layer, and rectangular slot is offered in the middle part of metal layer, and bar shaped segmentation fluting is symmetrically offered on the edge of the metal layer at rectangular slot both ends；Phased array antenna includes multiple fluting phase-shifting units, and fluting phase-shifting unit tiles by the period of the length of side of upper and lower two layer medium substrate, forms phased array antenna.The present invention has the characteristics that loaded circuit is simple, miniaturization, manufacturing cost is low, Phase Continuation is adjustable.
Description
Technical field
The invention belongs to the imaging in Terahertz field, radar, satellite communication field, more particularly to it is a kind of based on liquid crystal too
The phased array antenna of hertz fluting phase-shifting unit and its composition.
Background technology
Compared with traditional mechanical scanning type antenna, electric scanning phased array antenna has more rapid accurate beam scanning
Ability.Farther target search and more reliable and more stable performance may be implemented.
Microstrip array reflector antenna combines the advantages of traditional parabola antenna and micro-strip array antenna.It can be in sub- milli
Collimated wave beam is generated within the scope of metric wave and Terahertz.With very high radiation efficiency and wider beam-scanning angles.Micro-strip
The core of array reflector antenna research is how to design the structure snd size of each unit, is allowed to realize incidence wave specific
Phase compensation, to form specific wave beam.Traditional microstrip reflection array antenna is mainly the following design method, and one
It is to realize phase compensation by changing the structure size of microband paste；Second is that by loading different length on different patches
Delay line phase compensates phase；Third, obtaining different phase compensation by rotating different angles to chip unit；Four
It is to realize phase shift by loading gap on the substrate under patch.
It can not be adjusted after the structure of microstrip array is selected in above-mentioned method so that the beam position of antenna also determines that
, no decree scanning angle changes.Usually by giving each array element to add a phase shifter, realization passes through the modes such as automatically controlled
Control the phase shift of phase-shifting unit.Traditional phase shifter has varactor phase shifter, ferrite phase shifter, PIN diode phase shift
Device, MEMS phase shifters etc..Varactor high band parasitic character than more serious, be only capable of applying to low-frequency range；Ferrite
The Phase-Shifting Characteristics of phase shifter are easily migrated with external environment, it is difficult to be accurately controlled；The processing technology of MEMS phase shifters precision in need,
Realize the shortcomings of difficulty is big, manufacturing cost is excessively high；And the high bit phase shifter based on PIN diode need to occupy larger area, it is inevitable
The spacing between array element can be increased, the graing lobe index of antenna is deteriorated.Because of device high frequency performance（Varactor）, difficulty of processing
（MEMS）, circuit area（PIN diode）The restriction of equal many factors, the working frequency one of above several reflective phased arrays
As below W-waveband, it is difficult to the work of competent higher frequency.
With the development in Terahertz field, reflective array has obtained extensive as powerful Wave beam forming platform
Research.Under Terahertz frequency, adjustable electromagnetic material such as ferroelectric film, the new materials such as liquid crystal or even graphene can be used as building
A part for reflective array element, to reach identical Phasing.The reflective array of adjustable electromagnetic design of material, uses phase
Corresponding simple structure and realize high-gain, while providing the quick self-adapted beamforming capability of phased array.Due to not
It is also convenient to need the transmission line feeding network as traditional phased array, regulation and control.Greatly reducing for number of transceivers, obtains
To cost more lower than traditional phased array.
The electrically controllable structure of shifting to of current liquid crystal usually first designs phase-shifting unit, after by connecting line come to phase-shift structure present
Electricity.It can make a big impact, can not realize very interior on a large scale to shifting to performance if using wide connecting line during this
Good phase shift performance.And can then so that difficulty of processing improves using narrow connecting line, decrease in yield and loading resistor increase
Add, voltage's distribiuting is uneven etc..In addition, for phase-shifting unit, it is insufficient to liquid crystal covering surface if fruit structure is too small, then it can cause
Non-uniform electric in liquid crystal layer.
Invention content
The phased array antenna of the Terahertz fluting phase-shifting unit and its composition that the present invention provides a kind of based on liquid crystal, the liquid
Brilliant phase-shifting unit can be operated in the up to Terahertz frequency range of 100GHz or more, and have excellent performance, and phase-shifting unit is constituted
Reflector antenna realize one-dimensional wide-angle continuous scanning.
The technical solution adopted by the present invention is：
Terahertz fluting phase-shifting unit based on liquid crystal, includes upper and lower two layer medium substrate, upper and lower two layer medium substrate
Liquid crystal layer is injected in gap, it is characterised in that：The upper and lower two layer medium substrate is the identical square structure of size, institute
It states and is equipped with metal micro-strip patch electrode on the downside of upper layer medium substrate, wire ground electrode is equipped on the upside of layer dielectric substrate；It is described
Metal micro-strip patch electrode includes metal layer, and rectangular slot is offered in the middle part of metal layer, is located at the metal at rectangular slot both ends
Bar shaped segmentation fluting is symmetrically offered on the edge of layer, the length and width degree of the rectangular slot is respectively less than the side of upper layer medium substrate
Long, the length of side that the length slotted is equal with the length of side of upper layer medium substrate, width is less than upper layer medium substrate is divided in the bar shaped.
The Terahertz fluting phase-shifting unit based on liquid crystal, it is characterised in that：Epoxy is used around the liquid crystal layer
Resin seal, and in upper and lower surface polyimides membrane orienting.
The Terahertz fluting phase-shifting unit based on liquid crystal, it is characterised in that：The upper and lower two layer medium substrate is equal
It is made of quartz.
The Terahertz fluting phase-shifting unit based on liquid crystal, it is characterised in that：The metal micro-strip patch electrode, gold
Belong to grounding electrode to be made of metallic copper.
Phased array antenna, it is characterised in that：Including multiple fluting phase-shifting units, the fluting phase-shifting unit is with upper and lower two
The length of side of layer medium substrate tiles for the period, forms phased array antenna.
The present invention operation principle be：
The present invention passes through the biasing between the metal layer of liquid crystal upper and lower surface so that occurs bias field in liquid crystal layer so that
Nematic liquid crystal molecules deflect.Due to liquid crystal molecule level from it is vertical when dielectric constant it is different, liquid crystal molecule deflect
Afterwards, dielectric constant changes.This makes the resonance frequency point at fluting change, to realize the phase at different frequent points
It changes.Since cut-off rule is slotted so that will not be impacted to adjacent rows to uniline addition voltage.By adding to not going together
Add different voltages, changes the reflected phase of often row unit so that reflectarray antenna forms specific beam position or reality
Existing wavefront figuration.By adjusting voltage so that radiation direction realizes phased array antenna in wide variation, extensive angle scanning.
The present invention has the following advantages：
1, structure is simplified while the performance for obtaining needs using the structure of plane fluting in the present invention so that make
Technique is simpler, the slotted patch structure optimization Phase-Shifting Characteristics of phase-shifting unit in the lower surface of first layer medium substrate,
Increase the phase shift range of unit；
2, bias voltage loaded circuit is simple, and it is convenient to realize, while reducing technology difficulty, by the quantity for increasing resonance fluting
360 degree or more of phase difference in broadband may be implemented；
3, automatically controlled mode may be used and change Phase-Shifting Characteristics, there are the spies such as minimize, manufacturing cost is low, Phase Continuation is adjustable
Point can work within the scope of 100G frequencies above.
Description of the drawings
Fig. 1 is structural schematic diagram provided by the invention.
Fig. 2 is the array schematic diagram provided by the invention being made of liquid crystal phase-shifting unit.
Fig. 3 is the front view of liquid crystal phase-shifting unit structure provided by the invention.
Fig. 4 is the paster structure schematic diagram of first layer substrate lower surface provided by the invention.
Fig. 5 is the sectional view of liquid crystal phase-shifting unit structure provided by the invention.
Fig. 6 is liquid crystal phase-shifting unit resonance frequency point provided by the invention with change in dielectric constant figure.
Fig. 7 is the phase shift curve that liquid crystal phase-shifting unit change in dielectric constant provided by the invention generates.
Fig. 8 be frequency be 370GHz when liquid crystal phase-shifting unit phase shift curve.
Specific implementation mode
Embodiment
Terahertz fluting phase-shifting unit based on liquid crystal, structure is as shown in Fig. 1,3,4.It include upper and lower two layer medium
Substrate 1,2, liquid crystal layer 3 is injected in the gap of upper and lower two layer medium substrate 1,2, and two layer medium substrate 1,2 is made using quartz
At upper and lower two layer medium substrate 1,2 is the identical square structure of size, and the length of side of medium substrate is 360um, and thickness is
250um.Liquid crystal material is set as SLC103014-200（Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd.）Nematic liquid
The thickness of crystalline substance, liquid crystal layer is 45um.Metal micro-strip patch electrode is equipped on the downside of the upper layer medium substrate, on layer dielectric substrate
Side is equipped with wire ground electrode 5, and electrode structure is copper product, thickness 0.25um.Metal micro-strip patch electrode includes metal layer
4, rectangular slot 6 is offered in the middle part of metal layer, and bar shaped is symmetrically offered on the edge of the metal layer at rectangular slot both ends
The length and width degree of segmentation fluting 7, the rectangular slot 6 is set to 180um and 20um, the length and width degree point of bar shaped segmentation fluting 7
360um and 40um are not set as it.
It is sealed with epoxy resin around liquid crystal layer 3, and in upper and lower surface polyimides membrane orienting.
In order to realize that the phased array antenna being made of above-mentioned liquid crystal phase-shifting unit, fluting phase-shifting unit are situated between with upper and lower two layers
The length of side of matter substrate tiles for the period, is made the paster structure composition needed of photolithography method on first layer medium substrate
Array element and connecting line, as shown in Fig. 2,5.Wire ground electrode is plated out on second layer medium substrate.Two layer medium is flat
The contact surface in face is oriented using polyimide film to liquid crystal layer.Gap between two layer medium substrate is sealed with epoxy resin, then
Nematic crystal is injected, the otch of upper surface is completely covered in liquid crystal.
In the above-mentioned technical solutions, working frequency and phase shift range of the size relationship of fluting to liquid crystal phase-shifting unit.It adjusts
The size of section patch can change working frequency.In the above-mentioned technical solutions, the center operating frequency of phase-shifting unit is in 370GHZ.
Liquid crystal phase-shifting unit is emulated in CST, obtain under arrangement works frequency reflected amplitudes such as Fig. 6 and this
Shown in phase-shift curve Fig. 7 under frequency.It can be seen that phase shift angle is more than 180 in 364-371GHz frequency ranges.Theoretical maximum phase
It is 202 degree to move angle.The phase shift curve changed with dielectric constant in 370GHz is as shown in Figure 8.
Claims (5)
- The phase-shifting unit 1. Terahertz based on liquid crystal is slotted, includes upper and lower two layer medium substrate, upper and lower two layer medium substrate Gap in be injected with liquid crystal layer, it is characterised in that：The upper and lower two layer medium substrate is the identical square structure of size, It is equipped with metal micro-strip patch electrode on the downside of the upper layer medium substrate, wire ground electrode is equipped on the upside of layer dielectric substrate；Institute It includes metal layer to state metal micro-strip patch electrode, and rectangular slot is offered in the middle part of metal layer, is located at the gold at rectangular slot both ends Belong to and symmetrically offer bar shaped segmentation fluting on the edge of layer, the length and width degree of the rectangular slot is respectively less than upper layer medium substrate The side that the length slotted is equal with the length of side of upper layer medium substrate, width is less than upper layer medium substrate is divided in the length of side, the bar shaped It is long.
- The phase-shifting unit 2. Terahertz according to claim 1 based on liquid crystal is slotted, it is characterised in that：The liquid crystal layer Surrounding is sealed with epoxy resin, and in upper and lower surface polyimides membrane orienting.
- The phase-shifting unit 3. Terahertz according to claim 1 based on liquid crystal is slotted, it is characterised in that：Described upper and lower two Layer medium substrate is all made of quartz and is made.
- The phase-shifting unit 4. Terahertz according to claim 1 based on liquid crystal is slotted, it is characterised in that：The metal micro-strip Patch electrode, wire ground electrode are made of metallic copper.
- 5. phased array antenna, it is characterised in that：Including multiple fluting phase-shifting units, the fluting phase-shifting unit is with upper and lower two layers The length of side of medium substrate tiles for the period, forms phased array antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810330867.1A CN108539331B (en) | 2018-04-13 | 2018-04-13 | Terahertz slotting phase-shifting unit based on liquid crystal and phased array antenna formed by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810330867.1A CN108539331B (en) | 2018-04-13 | 2018-04-13 | Terahertz slotting phase-shifting unit based on liquid crystal and phased array antenna formed by same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108539331A true CN108539331A (en) | 2018-09-14 |
| CN108539331B CN108539331B (en) | 2021-01-15 |
Family
ID=63480301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810330867.1A Active CN108539331B (en) | 2018-04-13 | 2018-04-13 | Terahertz slotting phase-shifting unit based on liquid crystal and phased array antenna formed by same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108539331B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193162A (en) * | 2018-09-20 | 2019-01-11 | 合肥工业大学 | A kind of quick regulation method of the reflective phase-shifting unit of Terahertz and its internal liquid crystal |
| CN109494462A (en) * | 2018-11-09 | 2019-03-19 | 哈尔滨工业大学 | The automatically controlled beam scanning array antenna of Terahertz two dimension based on liquid crystal |
| CN110957585A (en) * | 2019-12-24 | 2020-04-03 | 清华大学 | Planar reflective array antenna based on liquid crystal material |
| CN111682317A (en) * | 2020-05-19 | 2020-09-18 | 电子科技大学 | Two-dimensional beam scanning holographic leaky-wave antenna based on liquid crystal |
| CN111984049A (en) * | 2020-09-01 | 2020-11-24 | 成都天锐星通科技有限公司 | Differential pressure control method and system and active phased array antenna |
| CN112436275A (en) * | 2020-11-02 | 2021-03-02 | 哈尔滨工业大学 | Transmission type electric control terahertz antenna based on liquid crystal material |
| CN112510372A (en) * | 2020-12-10 | 2021-03-16 | 电子科技大学 | Terahertz phased array antenna based on liquid crystal medium phase shifter |
| CN113540809A (en) * | 2021-06-11 | 2021-10-22 | 中国船舶重工集团公司第七二三研究所 | Terahertz array and antenna front end |
| CN113540711A (en) * | 2021-07-07 | 2021-10-22 | 电子科技大学 | Cylindrical surface spiral type conformal liquid crystal phase shifter |
| CN113708064A (en) * | 2021-10-28 | 2021-11-26 | 网络通信与安全紫金山实验室 | Circularly polarized reconfigurable antenna |
| CN114976534A (en) * | 2022-05-31 | 2022-08-30 | 合肥工业大学 | Terahertz reflection type phase shifter |
| CN114976534B (en) * | 2022-05-31 | 2024-05-17 | 合肥工业大学 | Terahertz reflection type phase shifter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105308789A (en) * | 2013-02-15 | 2016-02-03 | 达姆施塔特工业大学 | Phase shift device |
| CN106154603A (en) * | 2016-07-29 | 2016-11-23 | 合肥工业大学 | A kind of liquid crystal phase-shifting unit and the phased antenna of composition thereof |
| CN107453013A (en) * | 2017-09-04 | 2017-12-08 | 电子科技大学 | A kind of phase shifter based on liquid crystal material |
-
2018
- 2018-04-13 CN CN201810330867.1A patent/CN108539331B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105308789A (en) * | 2013-02-15 | 2016-02-03 | 达姆施塔特工业大学 | Phase shift device |
| CN106154603A (en) * | 2016-07-29 | 2016-11-23 | 合肥工业大学 | A kind of liquid crystal phase-shifting unit and the phased antenna of composition thereof |
| CN107453013A (en) * | 2017-09-04 | 2017-12-08 | 电子科技大学 | A kind of phase shifter based on liquid crystal material |
Non-Patent Citations (2)
| Title |
|---|
| JUN YANG，ET AL: "Design of 340GHz Liquid Crystal Modulator Based on Double-Layer Metal Hole Arrays", 《2016 IEEE INTERNATIONAL CONFERENCE ON MICROWAVE AND MILLIMETER WAVE TECHNOLOGY (ICMMT)》 * |
| SHENG GAO，ET AL: "Tunable Liquid Crystal Based Phase Shifter with a Slot Unit Cell for Reconfigurable Reflectarrays in F-Band", 《APPLIED SCIENCES》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193162B (en) * | 2018-09-20 | 2020-11-20 | 合肥工业大学 | Terahertz reflection type phase-shifting unit and rapid regulation and control method of liquid crystal inside terahertz reflection type phase-shifting unit |
| CN109193162A (en) * | 2018-09-20 | 2019-01-11 | 合肥工业大学 | A kind of quick regulation method of the reflective phase-shifting unit of Terahertz and its internal liquid crystal |
| CN109494462A (en) * | 2018-11-09 | 2019-03-19 | 哈尔滨工业大学 | The automatically controlled beam scanning array antenna of Terahertz two dimension based on liquid crystal |
| CN109494462B (en) * | 2018-11-09 | 2020-06-09 | 哈尔滨工业大学 | Terahertz two-dimensional electronic control beam scanning array antenna based on liquid crystal |
| CN110957585B (en) * | 2019-12-24 | 2021-04-13 | 清华大学 | Planar reflective array antenna based on liquid crystal material |
| CN110957585A (en) * | 2019-12-24 | 2020-04-03 | 清华大学 | Planar reflective array antenna based on liquid crystal material |
| CN111682317A (en) * | 2020-05-19 | 2020-09-18 | 电子科技大学 | Two-dimensional beam scanning holographic leaky-wave antenna based on liquid crystal |
| CN111984049A (en) * | 2020-09-01 | 2020-11-24 | 成都天锐星通科技有限公司 | Differential pressure control method and system and active phased array antenna |
| CN112436275A (en) * | 2020-11-02 | 2021-03-02 | 哈尔滨工业大学 | Transmission type electric control terahertz antenna based on liquid crystal material |
| CN112510372A (en) * | 2020-12-10 | 2021-03-16 | 电子科技大学 | Terahertz phased array antenna based on liquid crystal medium phase shifter |
| CN112510372B (en) * | 2020-12-10 | 2021-08-24 | 电子科技大学 | Terahertz phased array antenna based on liquid crystal medium phase shifter |
| CN113540809A (en) * | 2021-06-11 | 2021-10-22 | 中国船舶重工集团公司第七二三研究所 | Terahertz array and antenna front end |
| CN113540711A (en) * | 2021-07-07 | 2021-10-22 | 电子科技大学 | Cylindrical surface spiral type conformal liquid crystal phase shifter |
| CN113708064A (en) * | 2021-10-28 | 2021-11-26 | 网络通信与安全紫金山实验室 | Circularly polarized reconfigurable antenna |
| CN113708064B (en) * | 2021-10-28 | 2022-02-11 | 网络通信与安全紫金山实验室 | Circularly polarized reconfigurable antenna |
| CN114976534A (en) * | 2022-05-31 | 2022-08-30 | 合肥工业大学 | Terahertz reflection type phase shifter |
| CN114976534B (en) * | 2022-05-31 | 2024-05-17 | 合肥工业大学 | Terahertz reflection type phase shifter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108539331B (en) | 2021-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108539331A (en) | The phased array antenna of Terahertz fluting phase-shifting unit and its composition based on liquid crystal | |
| CN106154603B (en) | Liquid crystal phase-shifting unit and phase-controlled antenna formed by same | |
| Bildik et al. | Reconfigurable folded reflectarray antenna based upon liquid crystal technology | |
| CN106532200B (en) | Reflection type liquid crystal phase-shifting unit based on graphene electrode | |
| US11837802B2 (en) | Liquid crystal antenna unit and liquid crystal phased array antenna | |
| US6919854B2 (en) | Variable inclination continuous transverse stub array | |
| CN109494462B (en) | Terahertz two-dimensional electronic control beam scanning array antenna based on liquid crystal | |
| CN104617383A (en) | Multi-beam scanning lens antenna | |
| CN111682317A (en) | Two-dimensional beam scanning holographic leaky-wave antenna based on liquid crystal | |
| CN108767485B (en) | Planar microstrip transmission array antenna | |
| WO2021000731A1 (en) | Antenna assembly and electronic device | |
| CN107819202A (en) | Beam scanning reflecting antenna array and beam sweeping method based on graphene | |
| CN109687108A (en) | A kind of low section broadband and wideangle phased array antenna of big unit spacing | |
| Mishra et al. | Beam steered linear array of cylindrical dielectric resonator antenna | |
| CN111009735B (en) | Terahertz broadband circularly polarized frequency scanning super surface | |
| Marin et al. | Basic investigations of 35 GHz reflectarrays and tunable unit-cells for beam steering applications | |
| CN114614261A (en) | Terahertz circularly polarized directional diagram reconfigurable antenna based on MEMS switch | |
| CN110120585A (en) | The LCD electric-controlled scanning reflection array antenna of circular polarisation | |
| Li et al. | A review of wideband wide-angle scanning 2-D phased array and its applications in satellite communication | |
| CN109066021B (en) | Reflective liquid crystal phase-shifting unit | |
| Dieter et al. | Folded reflectarray antenna using a modified polarization grid for beam-steering | |
| CN115036684B (en) | Ka wave band two-dimensional wave beam scanning reflective array antenna based on liquid crystal | |
| CN208272080U (en) | A kind of reflective dual-layered liquid crystal phase-shifting unit | |
| CN110165406A (en) | A kind of directional diagram reconstructable aerial unit and phased array | |
| US20220158342A1 (en) | Reconfigurable antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |