CN114976534B - Terahertz reflection type phase shifter - Google Patents
Terahertz reflection type phase shifter Download PDFInfo
- Publication number
- CN114976534B CN114976534B CN202210608394.3A CN202210608394A CN114976534B CN 114976534 B CN114976534 B CN 114976534B CN 202210608394 A CN202210608394 A CN 202210608394A CN 114976534 B CN114976534 B CN 114976534B
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- phase shifter
- cross star
- terahertz
- layer
- 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.)
- Active
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 49
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 239000004988 Nematic liquid crystal Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000010287 polarization Effects 0.000 abstract description 25
- 230000033228 biological regulation Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 230000010363 phase shift Effects 0.000 description 6
- 238000004088 simulation Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004005 microsphere Substances 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a terahertz reflection phase shifter, which comprises a plurality of terahertz reflection phase shifting units which are arranged periodically; the terahertz reflection type phase shifting unit comprises a first medium substrate, a resonance structure, a liquid crystal layer, a reflection layer and a second medium substrate which are sequentially arranged according to the incident direction of electromagnetic waves; the resonance structure is formed by arranging a plurality of cross star-shaped slotting units; the cross star-shaped slotting unit comprises a cross star-shaped slotting structure; the cross star slotting structure is obtained by chamfering arms at two adjacent ends with the radius r, wherein the width of the cross star slotting structure is c, and the length of the cross star slotting structure is b. The characteristic of high symmetry of the cross star-shaped slotted structure in the resonant structure enables the terahertz reflection type phase shifter provided by the invention to have nearly the same phase regulation effect on electromagnetic waves incident at different polarization angles, and the stability of the terahertz reflection type phase shifter is greatly improved.
Description
Technical Field
The invention relates to the technical field of terahertz wave front control, in particular to a terahertz reflection type phase shifter.
Background
Liquid crystal refers to a substance having both liquid and crystal characteristics, and is widely used in electromagnetic wave regulation devices due to its electromagnetic characteristics; because the liquid crystal molecules have the characteristics of fluidity and dielectric anisotropy at the same time due to the self structure, under the condition that the initial angle is fixed by means of friction orientation and the like, the rotating angle of the liquid crystal in a specific direction can be changed by changing the magnitude and the direction of an electric field around the liquid crystal molecules, and the refractive index of electromagnetic waves in the specific direction can be changed.
In the fields of electromagnetic communication, radar detection, measurement and control mapping, etc., the polarization characteristics of electromagnetic waves relate to the propagation of electromagnetic waves, the reflection on objects, and the reception of signals. While polarization characteristics may also be applied to increase communication bandwidth and confidentiality of communications. When the lower terahertz reflective phase shifter is very sensitive to the polarization direction, on one hand, the efficiency of the phase shifter is reduced under the condition that the polarization angles are not matched, which is caused by polarization isolation, and on the other hand, as the reflective phase shifter, a large number of units are needed for regulating and controlling the phase compensation, and even the change of the polarization angle of the incident electromagnetic wave can cause the reflective phase shifter to be inoperable.
Disclosure of Invention
The invention aims to provide a terahertz reflection type phase shifter, which realizes the regulation and control of electromagnetic wave phases in an electric control mode and ensures the stable operation of the phase shifter under the condition of rotating the polarization angle of incident electromagnetic waves.
In order to achieve the above object, the present invention provides the following solutions:
A terahertz reflection type phase shifter comprises a plurality of terahertz reflection type phase shifting units which are arranged periodically; the terahertz reflection type phase shifting unit comprises a first medium substrate, a resonance structure, a liquid crystal layer, a reflection layer and a second medium substrate which are sequentially arranged according to the incident direction of electromagnetic waves;
The resonance structure is formed by arranging a plurality of cross star-shaped slotting units; the cross star-shaped slotting unit comprises a cross star-shaped slotting structure; the cross star slotting structure is obtained by chamfering arms at two adjacent ends with the radius r, wherein the width of the cross star slotting structure is c, and the length of the cross star slotting structure is b.
Optionally, the materials of the resonant structure and the reflective layer are conductive media.
Optionally, the materials of the first dielectric substrate and the second dielectric substrate are low-electromagnetic-loss dielectrics.
Optionally, the liquid crystal layer includes a first alignment layer, a liquid crystal filling layer, and a second alignment layer; the liquid crystal filling layer is disposed between the first alignment layer and the second alignment layer.
Optionally, the liquid crystal type of the liquid crystal layer is nematic liquid crystal.
Optionally, the liquid crystal layer is sealed with an epoxy resin.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
The characteristic of high symmetry of the cross star-shaped slotted structure in the resonant structure enables the terahertz reflection type phase shifter provided by the invention to have nearly the same phase regulation effect on electromagnetic waves incident at different polarization angles, and the stability of the terahertz reflection type phase shifter is greatly improved. For the terahertz reflection type phase shifter array in the phased array, the structure with stable polarization angle can simplify the complexity of compensation calculation, and electromagnetic waves incident in different polarization directions only need less compensation, so that the working polarization angles of the terahertz reflection type phase shifter and the antenna are widened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a terahertz reflection phase shifter provided by the invention;
fig. 2 is a schematic structural diagram of a cross star-shaped slotting unit provided by the invention;
FIG. 3 is a side sectional view of the terahertz reflection type phase shifting unit provided by the invention when not powered;
FIG. 4 is a cross-sectional side view of the terahertz reflection type phase shifting unit provided by the invention when voltage is applied to liquid crystal full bias;
FIG. 5 is a phase shift curve of the terahertz reflection type phase shift unit according to the present invention, which is obtained by simulation and varies with the relative dielectric constant of liquid crystal molecules;
FIG. 6 is a reflection wave phase curve obtained by rotating the polarization angle of an incident electromagnetic wave under the condition that the relative dielectric constant of liquid crystal is unchanged, which is obtained by simulation of the terahertz reflection type phase shifting unit provided by the invention;
fig. 7 is a phase difference curve of electromagnetic wave phases with different polarization angles and an initial reflected wave of 0 ° of the terahertz reflection type phase shifting unit provided by the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a terahertz reflection type phase shifter, which realizes the regulation and control of electromagnetic wave phases in an electric control mode and ensures the stable operation of the phase shifter under the condition of rotating the polarization angle of incident electromagnetic waves.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the terahertz reflection phase shifter provided by the invention comprises a plurality of terahertz reflection phase shifting units which are arranged periodically; the terahertz reflection type phase shifting unit comprises a first dielectric substrate 1, a resonance structure 2, a liquid crystal layer 3, a reflection layer 4 and a second dielectric substrate 5 which are arranged in sequence according to the incident direction of electromagnetic waves.
As shown in fig. 2, the resonant structure 2 is formed by arranging a plurality of cross star-shaped slotting units 2.1; the cross star-shaped slotting unit 2.1 comprises a cross star-shaped slotting structure 2.1.1; the cross-shaped star-shaped grooving structure 2.1.1 is obtained by chamfering arms at two adjacent ends with a radius r, wherein the width of the cross-shaped star-shaped grooving structure is c, and the length of the cross-shaped star-shaped grooving structure is b.
As shown in fig. 3-4, the liquid crystal layer 3 includes a first alignment layer 3.1, a liquid crystal filling layer 3.2, and a second alignment layer 3.3; the liquid crystal filling layer 3.2 is arranged between the first alignment layer 3.1 and the second alignment layer 3.2. The liquid crystal filled in the liquid crystal layer 3 is uniaxial nematic liquid crystal, and the liquid crystal layer 3 needs to be packaged to avoid leakage.
The resonant structure 2 and the reflecting layer 4 not only have regulation and control effects on electromagnetic waves in a specific frequency band, but also serve as control electrodes of liquid crystals.
Specific examples are as follows:
in this embodiment, the material of the resonant structure 2 and the reflective layer 4 is copper, and the thickness is 0.5um; the dielectric substrate 1 and the dielectric substrate 5 are both made of quartz, and the thickness is 500um.
In this example, the liquid crystal filled in the liquid crystal layer 3 is HFUT-HB01 nematic liquid crystal, the thickness of the liquid crystal layer is controlled by a small amount of polystyrene microspheres distributed in the liquid crystal layer 3, the diameter of the polystyrene microspheres is 45um, and the thickness of the liquid crystal layer is 45um. The liquid crystal layer 3 is sealed with an epoxy resin.
As shown in fig. 2, the cross star-shaped slotting unit 2.1 comprises: the cross star slotting structure 2.1.1, wherein the length and the width of the cross star slotting unit 2.1 are a=1100 um, the cross star slotting structure 2.1.1 is obtained by chamfering the arms at two adjacent ends with the radius r=535 um of the cross star slotting structure with the width c=10um and the length b=1080 um, and the cross star slotting units 2.1 are arranged into the resonance unit 2 in a rectangular array mode.
The terahertz reflection type phase shifting unit has the following specific principle:
Taking a specific terahertz reflection type phase shifting unit as an example, the phase of the space electromagnetic wave is changed after the space electromagnetic wave is incident from the direction vertical to the first medium substrate 1 and reflected by the whole liquid crystal phase shifting unit, and the phase of the emergent electromagnetic wave can be further changed by controlling the rotation angle of the liquid crystal in the liquid crystal layer 3 through voltage, so that the function of active phase control is realized.
In this embodiment, the resonant structure 2 and the reflective layer 4 are connected to two ends of the ac power supply, and when no voltage is applied, the terahertz reflective phase-shifting unit is shown in fig. 3 in a side sectional view, and the direction of the long axis of the liquid crystal is parallel to the first dielectric substrate 1 and the second dielectric substrate 5; when a voltage is applied to the resonant structure 2 and the reflective layer 4 so that the liquid crystal molecules deflect to an angle perpendicular to the first dielectric substrate 1 and the second dielectric substrate 5, a side sectional view of the terahertz reflection type phase-shifting unit is shown in fig. 4.
In the present embodiment, the angle of rotation of the liquid crystal molecules and thus the refractive index of the liquid crystal layer 3 in the incident direction can be changed by applying different voltages to the resonant structure 2 and the reflective layer 4.
In this embodiment, the phase shift curve which is obtained by simulation of the terahertz reflection phase shift unit and varies with the relative dielectric constant of the liquid crystal molecules is shown in fig. 5, and the working range of the liquid crystal can be 113GHz-125GHz, and the maximum phase shift is 301 ° at 118.1 GHz. In order to analyze the rotation stability of the polarization angle, the relative dielectric constant of the liquid crystal is taken to be initial 2.58, only the polarization angle of the incident electromagnetic wave is changed, the reflected waves with different polarization angles are obtained through simulation, as shown in fig. 6, the whole phase compensation curve is not changed greatly, and a certain deviation can be seen by amplifying and observing the curve in the range of 124.75GHz-125.25GHz in fig. 6. To further characterize the difference in phase curves for each polarization angle, the difference between the phase of the reflected wave at the different polarization angles and the phase of the initial reflected wave is plotted as shown in fig. 7. As can be seen from fig. 6 and 7, the liquid crystal phase shift unit provided by the invention has stronger angle stability under the condition of only changing the polarization angle of the incident polarized electromagnetic wave.
According to the invention, the electromagnetic wave passing through the liquid crystal phase shifting unit is subjected to phase regulation and control by the electrode control liquid crystal, and due to the characteristic that the cross star-shaped slotted structure 2.1.1 in the resonant structure 2 is highly symmetrical, the reflection type phase shifter has nearly the same phase regulation and control effect on the electromagnetic wave entering at different polarization angles, so that the stability of the terahertz reflection type phase shifter is greatly improved. For the terahertz reflection type phase shifter array in the phased array antenna, the structure with stable polarization angle can simplify the complexity of compensation calculation, and electromagnetic waves incident in different polarization directions only need less compensation, so that the working polarization angles of the terahertz reflection type phase shifter and the antenna are widened.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (5)
1. The terahertz reflection type phase shifter is characterized by comprising a plurality of terahertz reflection type phase shifting units which are arranged periodically; the terahertz reflection type phase shifting unit comprises a first medium substrate, a resonance structure, a liquid crystal layer, a reflection layer and a second medium substrate which are sequentially arranged according to the incident direction of electromagnetic waves; the material of the resonance structure and the reflecting layer is conductive medium;
the resonance structure is formed by arranging a plurality of cross star-shaped slotting units; the cross star-shaped slotting unit comprises a cross star-shaped slotting structure; the length and width of the cross star-shaped slotting unit 2.1 are a=1100 um, and the cross star-shaped slotting structure is obtained by chamfering arms at two adjacent ends with the radius r, wherein the width of the cross star-shaped slotting structure is c, and the length of the cross-shaped slotting structure is b; c=10um, b=1080um, r=535 um.
2. The terahertz reflective phase shifter according to claim 1, wherein the first dielectric substrate and the second dielectric substrate are both made of low-electromagnetic-loss dielectric.
3. The terahertz reflective phase shifter according to claim 1, wherein the liquid crystal layer includes a first alignment layer, a liquid crystal filling layer, and a second alignment layer; the liquid crystal filling layer is disposed between the first alignment layer and the second alignment layer.
4. The terahertz reflective phase shifter according to claim 1, wherein the liquid crystal type of the liquid crystal layer is nematic liquid crystal.
5. The terahertz reflective phase shifter according to claim 1, wherein the liquid crystal layer is sealed by an epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210608394.3A CN114976534B (en) | 2022-05-31 | 2022-05-31 | Terahertz reflection type phase shifter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210608394.3A CN114976534B (en) | 2022-05-31 | 2022-05-31 | Terahertz reflection type phase shifter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114976534A CN114976534A (en) | 2022-08-30 |
| CN114976534B true CN114976534B (en) | 2024-05-17 |
Family
ID=82958436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210608394.3A Active CN114976534B (en) | 2022-05-31 | 2022-05-31 | Terahertz reflection type phase shifter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114976534B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552564A (en) * | 2015-12-29 | 2016-05-04 | 武汉科技大学 | Polarization-insensitive phase-gradient metasurface |
| KR20160057950A (en) * | 2014-11-14 | 2016-05-24 | 삼육대학교산학협력단 | Terahertz wave modulator based on metamaterial |
| CN105609903A (en) * | 2015-12-23 | 2016-05-25 | 西安电子科技大学 | Frequency selective surface with high selectivity and angle stability |
| CN107689488A (en) * | 2017-07-27 | 2018-02-13 | 西安理工大学 | Frequency-selective surfaces structure applied to ultra-wideband antenna |
| CN107834195A (en) * | 2017-12-05 | 2018-03-23 | 上海无线电设备研究所 | A kind of frequency-selective surfaces antenna house |
| CN108539331A (en) * | 2018-04-13 | 2018-09-14 | 合肥工业大学 | The phased array antenna of Terahertz fluting phase-shifting unit and its composition based on liquid crystal |
| 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 |
| CN109449601A (en) * | 2018-10-31 | 2019-03-08 | 宋应龙 | It is a kind of that surface cell is selected based on the ultra wide band frequency of low pass and band logical multi-layer-coupled |
| KR20190036790A (en) * | 2017-09-28 | 2019-04-05 | 포항공과대학교 산학협력단 | Metamaterial structure with photonic spin hall effect and manufacturing method thereof |
| WO2020177843A1 (en) * | 2019-03-01 | 2020-09-10 | Telefonaktiebolaget Lm Ericsson (Publ) | A metasurface arrangement |
| CN112490678A (en) * | 2020-11-12 | 2021-03-12 | 云南师范大学 | VO-based2Broadband terahertz super-surface absorption unit and super-surface absorber |
| CN112952392A (en) * | 2021-01-26 | 2021-06-11 | 东南大学 | Terahertz digital programmable super surface for liquid crystal regulation and control |
| CN113161754A (en) * | 2020-12-23 | 2021-07-23 | 人民华智通讯技术有限公司 | Ultra-wideband diffuse reflection super surface |
| CN113410650A (en) * | 2021-06-21 | 2021-09-17 | 山西大学 | Low-profile absorption/transmission integrated anti-interference device with ultra-wide absorption band |
| CN113656929A (en) * | 2021-06-11 | 2021-11-16 | 中国船舶重工集团公司第七二三研究所 | Simulation method of terahertz reflective phase shifter based on tunable liquid crystal material |
| CN114326226A (en) * | 2021-12-20 | 2022-04-12 | 中国科学院上海光学精密机械研究所 | Electric addressing super surface for terahertz wave front modulation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10720712B2 (en) * | 2016-09-22 | 2020-07-21 | Huawei Technologies Co., Ltd. | Liquid-crystal tunable metasurface for beam steering antennas |
| CN109932845B (en) * | 2018-06-08 | 2020-12-01 | 京东方科技集团股份有限公司 | Liquid crystal phase shifter and electronic device |
-
2022
- 2022-05-31 CN CN202210608394.3A patent/CN114976534B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160057950A (en) * | 2014-11-14 | 2016-05-24 | 삼육대학교산학협력단 | Terahertz wave modulator based on metamaterial |
| CN105609903A (en) * | 2015-12-23 | 2016-05-25 | 西安电子科技大学 | Frequency selective surface with high selectivity and angle stability |
| CN105552564A (en) * | 2015-12-29 | 2016-05-04 | 武汉科技大学 | Polarization-insensitive phase-gradient metasurface |
| CN107689488A (en) * | 2017-07-27 | 2018-02-13 | 西安理工大学 | Frequency-selective surfaces structure applied to ultra-wideband antenna |
| KR20190036790A (en) * | 2017-09-28 | 2019-04-05 | 포항공과대학교 산학협력단 | Metamaterial structure with photonic spin hall effect and manufacturing method thereof |
| CN107834195A (en) * | 2017-12-05 | 2018-03-23 | 上海无线电设备研究所 | A kind of frequency-selective surfaces antenna house |
| CN108539331A (en) * | 2018-04-13 | 2018-09-14 | 合肥工业大学 | The phased array antenna of Terahertz fluting phase-shifting unit and its composition based on liquid crystal |
| 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 |
| CN109449601A (en) * | 2018-10-31 | 2019-03-08 | 宋应龙 | It is a kind of that surface cell is selected based on the ultra wide band frequency of low pass and band logical multi-layer-coupled |
| WO2020177843A1 (en) * | 2019-03-01 | 2020-09-10 | Telefonaktiebolaget Lm Ericsson (Publ) | A metasurface arrangement |
| CN112490678A (en) * | 2020-11-12 | 2021-03-12 | 云南师范大学 | VO-based2Broadband terahertz super-surface absorption unit and super-surface absorber |
| CN113161754A (en) * | 2020-12-23 | 2021-07-23 | 人民华智通讯技术有限公司 | Ultra-wideband diffuse reflection super surface |
| CN112952392A (en) * | 2021-01-26 | 2021-06-11 | 东南大学 | Terahertz digital programmable super surface for liquid crystal regulation and control |
| CN113656929A (en) * | 2021-06-11 | 2021-11-16 | 中国船舶重工集团公司第七二三研究所 | Simulation method of terahertz reflective phase shifter based on tunable liquid crystal material |
| CN113410650A (en) * | 2021-06-21 | 2021-09-17 | 山西大学 | Low-profile absorption/transmission integrated anti-interference device with ultra-wide absorption band |
| CN114326226A (en) * | 2021-12-20 | 2022-04-12 | 中国科学院上海光学精密机械研究所 | Electric addressing super surface for terahertz wave front modulation |
Non-Patent Citations (5)
| Title |
|---|
| Multi-beam Antenna Based on Square Ring Slot and Metasurface;Zhen Zhao;2021 Cross Strait Radio Science and Wireless Technology Conference (CSRSWTC);20211213;全文 * |
| 一种超宽带反射型极化转换超表面设计;于惠存;曹祥玉;高军;韩江枫;周禹龙;;空军工程大学学报(自然科学版);20180625(第03期);全文 * |
| 太赫兹信息超材料与超表面;刘峻峰;刘硕;傅晓建;崔铁军;;雷达学报;20180205(第01期);全文 * |
| 太赫兹波段超介质十字型滤波器的设计与改进;潘武;张俊;余璇;曾威;;应用激光;20161215(第06期);全文 * |
| 太赫兹液晶反射阵列移相单元的设计与分析;葛忆;夏天雨;杨军;邓光晟;尹治平;桑磊;;太赫兹科学与电子信息学报;20170425(第02期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114976534A (en) | 2022-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zografopoulos et al. | Liquid‐crystal high‐frequency microwave technology: materials and characterization | |
| US8248178B2 (en) | High power waveguide polarizer with broad bandwidth and low loss, and methods of making and using same | |
| CN111273467B (en) | Terahertz wave front phase control device based on liquid crystal and wire grid-shaped super-structure surface | |
| US5537242A (en) | Liquid crystal millimeter wave open transmission lines modulators | |
| US20210367336A1 (en) | Feeding structure, microwave radio frequency device and antenna | |
| Bi et al. | Generation of orbital angular momentum beam with circular polarization ceramic antenna array | |
| Yang et al. | Electrically tunable reflective terahertz phase shifter based on liquid crystal | |
| Dong et al. | Dual-function switchable terahertz metamaterial device with dynamic tuning characteristics | |
| Wang et al. | A liquid crystal tunable metamaterial unit cell for dynamic metasurface antennas | |
| CN114566806A (en) | Low-loss terahertz reflective array antenna based on liquid crystal regulation and control dielectric super-surface | |
| Yang et al. | Ultrathin tri-band reflective cross-polarization artificial electromagnetic metasurface | |
| CN114976534B (en) | Terahertz reflection type phase shifter | |
| Karabey et al. | Methods for improving the tuning efficiency of liquid crystal based tunable phase shifters | |
| Gaebler et al. | Investigation of high performance transmission line phase shifters based on liquid crystal | |
| CN109066021B (en) | Reflective liquid crystal phase-shifting unit | |
| WO2022159522A1 (en) | Liquid crystal tunable single-coaxial and bicoaxial metamaterial elements | |
| Jiménez-Sáez et al. | Reconfigurable intelligent surfaces with liquid crystal technology: A hardware design and communication perspective | |
| Deng et al. | Reconfigurable linear-to-circular polarization conversion using liquid crystal-based reflective metasurface | |
| US5206613A (en) | Measuring the ability of electroptic materials to phase shaft RF energy | |
| US6963253B2 (en) | Broadband high precision circular polarizers and retarders in waveguides | |
| Shi et al. | Radiation pattern reconfigurable waveguide slot array antenna using liquid crystal | |
| Wang et al. | Electrically tunable liquid crystal phase shifter with excellent phase shift capability per wavelength based on opposed coplanar waveguide | |
| Kim et al. | Fast reconfigurable phase shifter based on a chiral liquid crystal configuration | |
| CN211554369U (en) | Half-wave plate based on asymmetric reflection type super surface structure | |
| WO2008061115A1 (en) | Pi-phase shift device for light |
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 |