CN102868007A - Dual-frequency circular polarization device based on chiral manual electromagnetic structure - Google Patents
Dual-frequency circular polarization device based on chiral manual electromagnetic structure Download PDFInfo
- Publication number
- CN102868007A CN102868007A CN201210347152XA CN201210347152A CN102868007A CN 102868007 A CN102868007 A CN 102868007A CN 201210347152X A CN201210347152X A CN 201210347152XA CN 201210347152 A CN201210347152 A CN 201210347152A CN 102868007 A CN102868007 A CN 102868007A
- Authority
- CN
- China
- Prior art keywords
- circular arc
- shaped metal
- circular
- rectangular enclosure
- participating media
- 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
Images
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
The invention relates to a dual-frequency circular polarization device based on a chiral manual electromagnetic structure. The dual-frequency circular polarization device comprises a layer of rectangular dielectric baseplate and periodic circular arc metal wire structures, which are manufactured on the rectangular dielectric baseplate in a transverse direction and a longitudinal direction, and each periodic circular arc metal wire structure comprises four circular arc metal wires; the four circular arc metal wires have same centre and equal central angles, the sizes of the two outside circular arc metal wires are same, and the sizes of the two inside circular arc metal wires are same; and the included angle arranged between the two outside circular arc metal wires is equal to the included angle arranged between the two inside circular arc metal wires. The dual-frequency circular polarization device provided by the invention can realize that the incident linear polarization wave is converted into circular polarized waves with differnet rotation directions on four syntony frequency points of two wave bands, the dual-frequency circular polarization device is of a plane structure, the structure is simple, and the dual-frequency circular polarization device is easy to manufacture.
Description
Technical field
The present invention relates to a kind of double frequency round polarized device, particularly a kind of double frequency round polarized device based on the chirality manual electromagnetic structure.
Background technology
Circularly polarised wave can suppress misty rain and disturb because have the rotation direction orthogonality, the technological merits such as anti-multipath effect, and therefore in satellite communication, the aspects such as radar are widely used.Except direct design circular polarized antenna, also usually utilize circular polarizer in the communication technology, the line polarization wave of incident is converted into circularly polarised wave, thereby reaches the purpose that excites the circular polarization radiation ripple.The shortcomings such as traditional circular polarizer has waveguide circular polarizer, grizzly bar circular polarizer and meander line circular polarizer etc., yet these conventional circular polarization utensils have complex structure, and section is high, and working frequency points is few.Because to electromagnetic special regulating and controlling effect, chirality manual electromagnetic structure material has been widely used in the polarization of electromagnetic wave characteristic.The people such as J.K.Gansel utilize gold shell spin line chirality manual electromagnetic structure to construct the circular polarizer (J.K.Gansel that is operated in infrared band, et al.Gold Helix Photonic Metamaterial as Broadband Circular Polarizer[J], Science 325,1513-1515 (2009) .), in the situation that line polarization wave incident, the outgoing wave of this circular polarizer in very wide frequency band shows as the right-handed circular polarization ripple, and the transmitance coefficient of right-handed circular polarization ripple surpasses 80%, but this circular polarizer can only be converted into the line polarization wave of incident a kind of circularly polarised wave, and the section height of this circular polarizer is near one times of wavelength.The people such as M.Mutlu utilize the two-layer successively U-shaped opening resonance loop structure of rotation to construct a kind of (M.Mutlu of circular polarizer based on the chirality manual electromagnetic structure, et al.Asymmetric chiral metamaterial circular polarizer based on four U-shaped split ring resonators[J], Optics Letters 32,1653-1655 (2011) .), this circular polarizer can be converted into the circularly polarised wave with different rotary direction with the line polarization wave of incident at two frequency places, but the structure relative complex of this artificial structure's material, this has also limited the scope of application of this circular polarizer.The patent (patent No. 201210105783.0) of before " a kind of multi-frequency polarized device based on the artificial structure " by name, a kind of circular polarizer based on multilayer artificial structure material has been proposed, in this patent, only design cycle property chiral metal structure can realize that electromagnetic wave is converted to the circularly polarised wave with different rotation directions at a plurality of resonance frequencies place with the line polarization wave of incident on the single-layer medium plate.
In sum, existing circular polarizer has the shortcomings such as complex structure, working frequency range are few.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies such as existing circular polarizer complex structure, working frequency range are few; A kind of double frequency round polarized device based on the chirality manual electromagnetic structure is proposed, this circular polarizer can realize the line polarization wave of incident is converted at four resonance frequency places of two frequency ranges the circularly polarised wave of different rotation directions, and this circular polarizer is planar structure, and is simple in structure, is easy to make.
The technical solution adopted for the present invention to solve the technical problems is: a kind of double frequency round polarized device based on the chirality manual electromagnetic structure, comprise one deck Rectangular Enclosure with Participating Media substrate 1, and the Rectangular Enclosure with Participating Media substrate make transversely and the periodicity circular arc-shaped metal line structure 2 vertically, each periodicity circular arc-shaped metal line structure comprises four circular arc-shaped metal lines 3,4,5 and 6, these four circular arc-shaped metal lines are arranged in respectively the tow sides of Rectangular Enclosure with Participating Media substrate 1, from the direction perpendicular to plane, Rectangular Enclosure with Participating Media substrate place, two circular arc-shaped metal lines 3 of upper end and 5 are positioned at the back side of Rectangular Enclosure with Participating Media plate in each cycle, and two circular arc-shaped metal lines 4 of below and 6 are positioned at the front of Rectangular Enclosure with Participating Media plate, the central angle that these four circular arc-shaped metal lines have the common center of circle and equate, and two circular arc-shaped metal lines 5 in the outside and 6 is measure-alike, inboard two circular arc-shaped metal lines 3 and 4 are measure-alike, and the angle between two outer arc shape metal wires 5 and 6 equates with the angle between two inner arc shape metal wires 3 and 4.
The Rectangular Enclosure with Participating Media substrate is commercial medium substrate, can effectively reduce the cost of this circular polarizer, and such as the medium substrate of the models such as Arlon AD250, the dielectric constant of medium substrate is ε
r
Described thickness based on Rectangular Enclosure with Participating Media substrate in the double frequency round polarized device of chirality manual electromagnetic structure is h, and periodically the cycle of circular arc-shaped metal line structure 2 is p, and the span of p is 2* λ
M1/ 5～4* λ
M1/ 5, λ wherein
M1Be effective wavelength corresponding to minimum frequency place in four frequencies of described multi-frequency polarized device work,
λ
01Be the wavelength in vacuum corresponding to minimum frequency of operation place, periodically two circular arc-shaped metal lines 5 in the outside and 6 external diameter are r1 in the circular arc-shaped metal line structure 2, and the span of r1 is λ
M1/ 4 ~ λ
M1/ 3, two circular arc-shaped metal lines 5 and the 6 width w1 spans in the outside are 0.1mm ~ λ
M1/ 10; Periodically inboard two circular arc-shaped metal lines 3 and 4 external diameter are r2 in the circular arc-shaped metal line structure 2, and the span of r2 is λ
M1/ 5 ~ λ
M1/ 4, two circular arc-shaped metal lines 3 in the outside and 4 width w2 span are 0.1mm ~ λ
M1/ 10.
The beneficial effect that the present invention has is:
(1) the present invention is simple in structure, and periodically circular arc-shaped metal line structure 2 is planar structure, is easy to make, and utilize the pcb board processing technology just can make, and this processing technology is now very ripe.
(2) the present invention's line polarization wave of being parallel to the vertical length of side of circular polarizer at direction of an electric field is in the situation perpendicular to the plane incident at Rectangular Enclosure with Participating Media substrate place, at the resonance frequency place, electric field can produce induced current on the every circular arc-shaped metal line in each cycle, this induced current distributes along the circular arc-shaped metal line, thereby inspire along the electric field of circular arc-shaped metal line endpoints, thereby produce four kinds of field coupled patterns, and then line polarization wave is converted into the circularly polarised wave of different rotation directions at the working frequency points place of four correspondences, have compared with prior art more working frequency points, and have more transmitted wave polarization mode.
Description of drawings
Fig. 1 is the double frequency round polarized device vertical view that the present invention is based on the chirality manual electromagnetic structure;
Fig. 2 is the double frequency round polarized device cellular construction end view that the present invention is based on the chirality manual electromagnetic structure;
Fig. 3 is the double frequency round polarized device cellular construction schematic diagram that the present invention is based on the chirality manual electromagnetic structure;
Fig. 4 is the conversion coefficient curve that the double frequency round polarized device that the present invention is based on the chirality manual electromagnetic structure is converted to the linear polarization incident wave circularly polarised wave.
Embodiment
The present invention is described in detail below in conjunction with the drawings and the specific embodiments, but protection scope of the present invention is not limited in following embodiment, should comprise the full content in claims.And those skilled in the art can realize full content the claim from a following embodiment.
Fig. 1 be this based on the circular polarizer vertical view of chirality manual electromagnetic structure, 1 represents the Rectangular Enclosure with Participating Media substrate among the figure, 2 representatives are produced on periodicity circular arc-shaped metal line structure on the Rectangular Enclosure with Participating Media substrate 1,
Fig. 2 be this based on the end view of the circular polarizer cellular construction of chirality manual electromagnetic structure, 1 represents the Rectangular Enclosure with Participating Media substrate among the figure, 2 represent periodically circular arc-shaped metal line structure.
As shown in Figure 3, the embodiment of the invention, double frequency round polarized device based on the chirality manual electromagnetic structure is comprised of one deck Rectangular Enclosure with Participating Media substrate and each cycle four circular arc-shaped metal line structures, and metal wire structure adopts and covers structures of copper lines in this invention example, and the specific implementation process is as follows:
(1) selecting Rectangular Enclosure with Participating Media substrate 1 model is Arlon AD250, relative dielectric constant ε
rBe 2.5, the height h of Rectangular Enclosure with Participating Media substrate is 3.05mm.
(2) incident direction of line polarization wave of determining circular polarizer response is perpendicular to the plane at Rectangular Enclosure with Participating Media substrate place, and the polarized electric field direction is parallel to the longitudinal boundary direction of this circular polarizer, i.e. y direction among Fig. 3, incident electromagnetic wave direction of propagation edge+z direction.
(3) should comprise one deck Rectangular Enclosure with Participating Media substrate based on the double frequency round polarized device of chirality manual electromagnetic structure, and Rectangular Enclosure with Participating Media substrate 1 make transversely and the periodicity circular arc-shaped metal line structure 2 vertically, four circular arc-shaped metal line structures in each cycle are arranged in respectively the upper and lower surface of Rectangular Enclosure with Participating Media substrate, from the direction perpendicular to plane, Rectangular Enclosure with Participating Media substrate place, two circular arc-shaped metal lines of upper end are positioned at the back side of Rectangular Enclosure with Participating Media plate in each cycle, and two circular arc-shaped metal lines of below are positioned at the front of Rectangular Enclosure with Participating Media plate, the central angle that these four circular arc-shaped metal lines have the common center of circle and equate, and two circular arc-shaped metal lines in the outside is measure-alike, two inboard circular arc-shaped metal linear dimensions are identical, and the angle between two outer arc shape metal wires equates with the angle between two inner arc shape metal wires; Concrete manufacturing process is as follows: at first utilize conventional lithography process, at a dielectric constant 2.5, thickness is spin coating photoresist on microwave pcb board (model Arlon AD250) the front metal layer of the double-sided copper-clad of 3.05mm, baking and curing, exposure, develop, the oven dry post bake, the steps such as wet etching metal level, produce simultaneously number of cycles on the two sides of microwave pcb board and be 15 * 15 periodicity circular arc-shaped metal line structure, each periodic unit comprises four circular arc-shaped metal lines, the cellular construction parameter is shaped as the shape shown in the circular arc-shaped metal line among Fig. 3 as shown in Figure 3.The parameter that this example is taked is of a size of: periodically the period p of circular arc-shaped metal line structure 2 is 11.5mm, the external diameter r1 of two circular arc-shaped metal lines in the outside is 5mm, the width w1 of circular arc-shaped metal line is 0.85mm, the external diameter r2 of two inboard circular arc-shaped metal lines is 3.85mm, width is 0.45mm, article four, the central angle θ that the circular arc-shaped metal line is corresponding is 110 °, and so far the circular polarizer based on the artificial structure completes, and its structure vertical view as shown in Figure 1.
Double frequency round polarized device based on the chirality manual electromagnetic structure of the present invention, by Finite-Difference Time-Domain Method (FDTD) simulation result as shown in Figure 4, ordinate among this figure represents that the line polarization wave of incident is converted to the conversion coefficient of circularly polarised wave, abscissa is frequency, what solid line represented among the figure is the conversion coefficient curve of left-hand circular polarization ripple, the conversion coefficient curve of right-handed circular polarization ripple and dotted line represents, the conversion coefficient that as can be seen from the figure is converted to circularly polarised wave at the line polarization wave of four resonance point place incidents of two frequency ranges has obvious difference, and the frequency of these four resonance points is respectively 12.25GHz, 13.9GHz, 15.57GHz and 16.86GHZ.And at the conversion coefficient of 12.25GHz and 15.57GHz place left-hand circular polarization ripple obviously greater than the conversion coefficient of right-handed circular polarization ripple, and at the conversion coefficient of 13.9GHz and 16.86GHz place right-handed circular polarization ripple obviously greater than the conversion coefficient of left-hand circular polarization ripple, show in line polarization wave normal incidence situation, being converted into the left-hand circular polarization ripple at 12.25GHz and 15.57GHz place outgoing wave, is the right-handed circular polarization ripple at 13.9GHz and 16.86GHz place outgoing wave.Just realized the line polarization wave of incident is converted to the circularly polarised wave with different rotation directions at four resonance point places of two frequency ranges by this periodic structure that only comprises four circular arc-shaped metal lines by each cycle.
The non-elaborated part of the present invention belongs to those skilled in the art's known technology.
Claims (5)
1. double frequency round polarized device based on the chirality manual electromagnetic structure, it is characterized in that: comprise one deck Rectangular Enclosure with Participating Media substrate (1), and the Rectangular Enclosure with Participating Media substrate make transversely and the periodicity circular arc-shaped metal line structure (2) vertically, each periodicity circular arc-shaped metal line structure comprises four circular arc-shaped metal lines (3), (4), (5) and (6), these four circular arc-shaped metal lines are arranged in respectively the tow sides of Rectangular Enclosure with Participating Media substrate (1), from the direction perpendicular to plane, Rectangular Enclosure with Participating Media substrate place, the back side that two circular arc-shaped metal lines (3) of upper end and (5) are positioned at the Rectangular Enclosure with Participating Media plate in each cycle, and the front that two circular arc-shaped metal lines (4) of below and (6) are positioned at the Rectangular Enclosure with Participating Media plate, the central angle that these four circular arc-shaped metal lines have the common center of circle and equate, and two circular arc-shaped metal lines (5) in the outside and (6) is measure-alike, inboard two circular arc-shaped metal lines (3) and (4) measure-alike, the angle between two outer arc shape metal wires (5) and (6) equates with angle between two inner arc shape metal wires (3) and (4); The line polarization wave of and this circular polarizer longitudinal boundary parallel when the electric field polarization direction is along perpendicular to the direction incident on plane, Rectangular Enclosure with Participating Media substrate place the time, and can be four of two frequency ranges different frequency place of this circular polarizer is converted into the circular polarization transmitted wave with different rotation directions with the line polarization wave of incident.
2. the double frequency round polarized device based on the chirality manual electromagnetic structure according to claim 1, it is characterized in that: described Rectangular Enclosure with Participating Media substrate (1) is commercial medium substrate, and the dielectric constant of Rectangular Enclosure with Participating Media substrate (1) is ε
r
3. the double frequency round polarized device based on the chirality manual electromagnetic structure according to claim 1, it is characterized in that: the thickness of Rectangular Enclosure with Participating Media substrate is h in the described Rectangular Enclosure with Participating Media substrate (1), periodically the cycle of circular arc-shaped metal line structure (2) is p, and the span of p is 2* λ
M1/ 5～4* λ
M1/ 5, λ wherein
M1Be effective wavelength corresponding to minimum frequency place in four resonance frequencies of described multi-frequency polarized device work,
λ
01Be the wavelength in vacuum corresponding to minimum frequency of operation place, periodically the external diameter of two circular arc-shaped metal lines in the outside is r1 in the circular arc-shaped metal line structure (2), and the span of r1 is λ
M1/ 4 ~ λ
M1/ 3, two circular arc-shaped metal line width w1 spans in the outside are 0.1mm ~ λ
M1/ 10; Periodically the external diameter of two inboard circular arc-shaped metal lines is r2 in the circular arc-shaped metal line structure (2), and the span of r2 is λ
M1/ 5 ~ λ
M1/ 4, two circular arc-shaped metal line width w2 spans in the outside are 0.1mm ~ λ
M1/ 10.
4. the double frequency round polarized device based on the chirality manual electromagnetic structure according to claim 1 is characterized in that: periodically the span of every corresponding central angle θ of circular arc-shaped metal line of circular arc-shaped metal line structure (2) is 0 °≤θ≤180 °.
5. the double frequency round polarized device based on the chirality manual electromagnetic structure according to claim 1 is characterized in that: the corresponding central angle in gap between periodicity circular arc-shaped metal line (3) and the circular arc-shaped metal line (4)
Span be
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210347152.XA CN102868007B (en) | 2012-09-18 | 2012-09-18 | Dual-frequency circular polarization device based on chiral manual electromagnetic structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210347152.XA CN102868007B (en) | 2012-09-18 | 2012-09-18 | Dual-frequency circular polarization device based on chiral manual electromagnetic structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102868007A true CN102868007A (en) | 2013-01-09 |
| CN102868007B CN102868007B (en) | 2015-04-01 |
Family
ID=47446708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210347152.XA Active CN102868007B (en) | 2012-09-18 | 2012-09-18 | Dual-frequency circular polarization device based on chiral manual electromagnetic structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102868007B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457034A (en) * | 2013-09-05 | 2013-12-18 | 中国科学院光电技术研究所 | Double-frequency double-circularly-polarized antenna based on arc chirality manual structure material |
| CN106953177A (en) * | 2017-04-27 | 2017-07-14 | 南京信息工程大学 | A kind of planar structure electromagnetic wave left-right-hand circular polarization converter |
| CN108767491A (en) * | 2018-05-22 | 2018-11-06 | 宁波大学 | A kind of dual-band dual-circular polarization device based on FSS |
| CN112577928A (en) * | 2020-11-24 | 2021-03-30 | 北京邮电大学 | Design method of high-sensitivity chiral molecule detection structure based on TDBCs-Kretschmann |
| CN115020989A (en) * | 2022-08-05 | 2022-09-06 | 盛纬伦(深圳)通信技术有限公司 | Chiral metamaterial unit and array capable of tuning linear circular polarization conversion |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01268208A (en) * | 1988-04-20 | 1989-10-25 | Yuuseishiyou Tsushin Sogo Kenkyusho | Micro strip antenna for circularly polarized wave |
| WO2001013465A1 (en) * | 1999-08-16 | 2001-02-22 | Novatel Inc. | Aperture coupled slot array antenna |
| US7006043B1 (en) * | 2004-01-16 | 2006-02-28 | The United States Of America, As Represented By The Secretary Of The Army | Wideband circularly polarized single layer compact microstrip antenna |
| CN101207228A (en) * | 2006-12-21 | 2008-06-25 | 西北工业大学 | Negative magnetoconductivity material with suitable thickness ring structure |
| US20100141358A1 (en) * | 2005-01-18 | 2010-06-10 | University Of Massachusetts Lowell | Chiral Metamaterials |
| US20100232017A1 (en) * | 2008-06-19 | 2010-09-16 | Ravenbrick Llc | Optical metapolarizer device |
| KR20110023618A (en) * | 2009-08-31 | 2011-03-08 | 홍익대학교 산학협력단 | Metamaterial omnidirectional circularly polarized antenna |
| CN102629702A (en) * | 2012-04-12 | 2012-08-08 | 中国科学院光电技术研究所 | Artificial structure-based multi-frequency circular polarizer |
-
2012
- 2012-09-18 CN CN201210347152.XA patent/CN102868007B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01268208A (en) * | 1988-04-20 | 1989-10-25 | Yuuseishiyou Tsushin Sogo Kenkyusho | Micro strip antenna for circularly polarized wave |
| WO2001013465A1 (en) * | 1999-08-16 | 2001-02-22 | Novatel Inc. | Aperture coupled slot array antenna |
| US7006043B1 (en) * | 2004-01-16 | 2006-02-28 | The United States Of America, As Represented By The Secretary Of The Army | Wideband circularly polarized single layer compact microstrip antenna |
| US20100141358A1 (en) * | 2005-01-18 | 2010-06-10 | University Of Massachusetts Lowell | Chiral Metamaterials |
| CN101207228A (en) * | 2006-12-21 | 2008-06-25 | 西北工业大学 | Negative magnetoconductivity material with suitable thickness ring structure |
| US20100232017A1 (en) * | 2008-06-19 | 2010-09-16 | Ravenbrick Llc | Optical metapolarizer device |
| KR20110023618A (en) * | 2009-08-31 | 2011-03-08 | 홍익대학교 산학협력단 | Metamaterial omnidirectional circularly polarized antenna |
| CN102629702A (en) * | 2012-04-12 | 2012-08-08 | 中国科学院光电技术研究所 | Artificial structure-based multi-frequency circular polarizer |
Non-Patent Citations (1)
| Title |
|---|
| ZARIFI, D.，SOLEIMANI, M.，NAYYERI, V.: "Dual- and Multiband Chiral Metamaterial Structures With Strong Optical Activity and Negative Refraction Index", 《ANTENNAS AND WIRELESS PROPAGATION LETTERS, IEEE》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457034A (en) * | 2013-09-05 | 2013-12-18 | 中国科学院光电技术研究所 | Double-frequency double-circularly-polarized antenna based on arc chirality manual structure material |
| CN103457034B (en) * | 2013-09-05 | 2016-01-20 | 中国科学院光电技术研究所 | A kind of double-frequency double-circularly-poantenna antenna based on arc chirality manual structure material |
| CN106953177A (en) * | 2017-04-27 | 2017-07-14 | 南京信息工程大学 | A kind of planar structure electromagnetic wave left-right-hand circular polarization converter |
| CN108767491A (en) * | 2018-05-22 | 2018-11-06 | 宁波大学 | A kind of dual-band dual-circular polarization device based on FSS |
| CN112577928A (en) * | 2020-11-24 | 2021-03-30 | 北京邮电大学 | Design method of high-sensitivity chiral molecule detection structure based on TDBCs-Kretschmann |
| CN115020989A (en) * | 2022-08-05 | 2022-09-06 | 盛纬伦(深圳)通信技术有限公司 | Chiral metamaterial unit and array capable of tuning linear circular polarization conversion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102868007B (en) | 2015-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102868007B (en) | Dual-frequency circular polarization device based on chiral manual electromagnetic structure | |
| CN103078185B (en) | Artificial electromagnetic structure material-based high-gain low-radar cross section planar antenna | |
| CN102629702B (en) | Artificial structure-based multi-frequency circular polarizer | |
| CN105390819A (en) | Ultra-wideband electromagnetic super-surface circular polarizer | |
| Yang et al. | A novel miniaturized frequency selective surface with excellent center frequency stability | |
| Suthar et al. | Gain enhancement of microstrip patch antenna using near-zero index metamaterial (NZIM) lens | |
| Dong et al. | Metamaterial-inspired broadband mushroom antenna | |
| Li et al. | A novel frequency selective surface with improved miniaturization performance | |
| CN205194854U (en) | Super surperficial circular polarization ware of ultra wide band electromagnetism | |
| CN103165986B (en) | A kind of super-medium wave-absorbing material and preparation method | |
| CN101383450A (en) | Dual frequency dual polarization microstrip patch antenna of low refraction guiding dielectric material | |
| CN105401669B (en) | Based on impedance matching to the unobstructed device of wireless signal | |
| Xue et al. | A new miniaturized fractal frequency selective surface with excellent angular stability | |
| CN204732528U (en) | A kind of artificial magnetic conductor unit, artificial magnetic conductor structure and flat plane antenna | |
| CN104078773A (en) | Microstrip patch antenna | |
| CN203950926U (en) | A kind of micro-strip paster antenna | |
| CN107171076B (en) | Multi-band circular polarizer based on chiral super surface | |
| Chandu et al. | Reduction of mutual coupling in a two element patch antenna array using sub-wavelength resonators | |
| KR101756816B1 (en) | Scalable frequency selective surface with miniaturized unit cell | |
| Shookooh et al. | Theory, design, and implementation of a new family of ultra-wideband metamaterial microstrip array antennas based on fractal and fibonacci geometric patterns | |
| Yarga et al. | A directive resonator antenna using degenerate band edge crystals | |
| Dong et al. | Miniaturized zeroth order resonance antenna over a reactive impedance surface | |
| Bouslama et al. | A new FSS superstrate structure for antenna performance enhancement | |
| Ling et al. | A microstrip printed dipole antenna with UC-EBG ground for RCS reduction | |
| Zeb et al. | A new technique to design 1-D dual-band EBG resonator antennas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |