WO2006098587A1 - Surface a selectivite de frequence pour le filtrage d'une bande de frequence et son procede de conception - Google Patents

Surface a selectivite de frequence pour le filtrage d'une bande de frequence et son procede de conception Download PDF

Info

Publication number
WO2006098587A1
WO2006098587A1 PCT/KR2006/000934 KR2006000934W WO2006098587A1 WO 2006098587 A1 WO2006098587 A1 WO 2006098587A1 KR 2006000934 W KR2006000934 W KR 2006000934W WO 2006098587 A1 WO2006098587 A1 WO 2006098587A1
Authority
WO
WIPO (PCT)
Prior art keywords
fss
loop
recited
unit cells
square shape
Prior art date
Application number
PCT/KR2006/000934
Other languages
English (en)
Inventor
Dong-Ho Kim
Jae-Ick Choi
Byung-Chan Kim
Dong-Uk Sim
Ji-Hwan Ko
Original Assignee
Electronics And Telecommunications Research Institute
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from KR1020050021383A external-priority patent/KR100632298B1/ko
Priority claimed from KR1020050041180A external-priority patent/KR100682996B1/ko
Application filed by Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Priority to JP2008501812A priority Critical patent/JP2008536366A/ja
Publication of WO2006098587A1 publication Critical patent/WO2006098587A1/fr

Links

Classifications

    • 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
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective

Definitions

  • the present invention relates to a Frequency Selective Surface (FSS) and a design method thereof, and more particularly, to a spatial FSS for an FSS that cuts off or transmits predetermined single or multiple frequency bands and a design method thereof.
  • FSS Frequency Selective Surface
  • an FSS has a structure that conductors or slots are periodically arranged on a dielectric slab.
  • the FSS serves as a kind of a spatial filter and has characteristics that transmit or reflect only a specific frequency.
  • Such an FSS has been widely utilized in various application fields ranging from classic fields such as a radome of an antenna, a dichroic reflector, a reflection array lens, etc. to modern fields such as an Electro-Magnetic Interference (EMI) protection, an increase of Radar Cross Section (RCS), stealth technologies, an Artificial Magnetic Conductor (AMC) and so on.
  • EMI Electro-Magnetic Interference
  • RCS Radar Cross Section
  • AMC Artificial Magnetic Conductor
  • FSS has frequency response characteristics that are severely varied depending on a geometrical shape, an array form, and an array period of a unit cell, and material characteristics of dielectrics and conductors adopted therein. Generally, structures of identical shapes of rectangle, concentric circle or the like but of different sizes are utilized as unit cells.
  • the first prior art employs an FSS to transmit only a frequency band desired by a user wherein a resonant frequency of FSS can be adjusted by varying a width and a whole length of a dielectric slot.
  • the above-mentioned prior art FSS has drawbacks that the frequency selective characteristics are varied depending on the polarization of electromagnetic waves, and it cannot accurately block electromagnetic waves at a frequency of multi- band. Moreover, since the conventional FSS merely adjusts a length of conductor or aperture surface to tune a cut-off frequency, it results in an increase of cost due to such design change. Disclosure of Invention Technical Problem
  • an object of the present invention to provide an FSS that allows multiple cut-off frequency bands to be easily adjusted without being affected by the polarization of electromagnetic waves by using a structure that a tri-pole and a ternary tree shape loop as a unit cell are connected without overlapping.
  • Another object of the invention is to provide a design method of an FSS that can block or transmit a predetermined frequency band by modifying geometrical structure characteristics such as a whole length of meandrous square loops used as unit cells in the FSS and intervals between the loops and electrical characteristics of dielectrics and conductors adopted in the FSS.
  • Frequency Selective Surface for the filtering of multiple frequency bands
  • the FSS comprising: a dielectric layer; and a plurality of unit cells periodically arrayed on an upper side of the dielectric layer, each of the unit cells being composed of a tri-pole and a ternary tree shape loop connected without overlapping.
  • the FSS is implemented in such a way that an end portion of the tri-pole is meshed with an internal end point of the ternary tree shape loop.
  • the FSS is implemented such that adjacent unit cells among the unit cells are geometrically meshed with each other.
  • the FSS is fully coated with a dielectric to vary a resonant frequency.
  • Frequency Selective Surface for the filtering of a single frequency band
  • the FSS comprising: a meandering square shape loop for being formed as a conductor or a dielectric layer; and a plurality of unit cells for being made of a conductor or a dielectric layer.
  • a method for designing an FSS for the filtering of a frequency band comprising the steps of: bending a square shape loop at least once to obtain a meandrous square shape loop and adjusting a length of the meandrous square shape loop when forming unit cells in the FSS; and arranging the unit cells such that the FSS is comprised of geometrically identical unit structures or cells to tune a resonant frequency.
  • the frequency band (e.g., mobile phone band 1.81 GHz, 2.4 GHz, ISM band, or the like) to be filtered can be adjusted by varying a length and interval of the meandrous square loop inside the unit cells of FSS, an interval between the unit cells, a thickness of the dielectric, a permittivity, etc.
  • the desired frequency band can be blocked or passed by adjusting a geometric length, size, location, thickness, and material of the meandrous square shape loop, dielectric, etc. forming the FSS.
  • the present invention is advantageous that it can enable a fine tuning of multiple cut-off frequencies by adjusting an electric capacitance between a tri-pole and a ternary tree shape loop.
  • the present invention is allowed to selectively block or transmit a predetermined frequency band desired by a user. Moreover, the invention has an advantage that it is possible to adjust a frequency to be filtered by varying a length of meandrous square loops constituting unit cells, a thickness of dielectric, and an interval between the unit cells, without any variation of each of the unit cells itself.
  • the invention employs a unit cell with user-desired adjustable area and also has superior characteristics that are not affected by the variation of polarization of incident electromagnetic waves.
  • an advantage is that the present invention can be used for various purposes such as masking of frequency bands for indoor silence or usage prohibition of a mobile phone, masking of frequency bands for protecting industry information by preventing an outflow of wireless LAN frequency bands, or the like.
  • Fig. 1 is a cross-sectional view of an FSS in accordance with a first embodiment of the present invention
  • Fig. 2 shows an array structure of unit cells of the FSS in accordance with the first embodiment of the present invention
  • FIG. 3 illustrates a detailed configuration of the unit cell depicted in Fig. 2;
  • FIG. 4 represents details of adjacent unit cells shown in Fig. 2;
  • Fig. 5 provides graphs showing resonant frequency characteristics of the FSS with respect to the unit cell structure
  • Fig. 6 presents graphs showing variations of the resonant frequency with respect to the thickness of the dielectric coating layer of the FSS in accordance with the first embodiment of the present invention
  • Fig. 7 offers graphs showing variations of resonant frequencies with respect to an interval between the unit cells of the FSS in accordance with the first embodiment of the present invention
  • Fig. 8 provides graphs showing changes of resonant frequencies with respect to a width of the tri-pole of the FSS in accordance with the first embodiment of the present invention
  • Fig. 8 provides graphs showing changes of resonant frequencies with respect to a width of the tri-pole of the FSS in accordance with the first embodiment of the present invention
  • FIG. 9 represents graphs showing analysis results of the FSS in accordance with the first embodiment of the present invention, which is manufactured depending on frequency bands of the mobile communication service; [32] Fig. 10 presents graphs showing predicted values and experimental values for frequency characteristic of the FSS which does not include the dielectric coating layer in accordance with the first embodiment of the present invention; [33] Fig. 11 shows an array of FSS unit cells for the filtering of a frequency in accordance with a second embodiment of the present invention; [34] Fig. 12 is a view showing a detailed configuration of the FSS unit cell for the filtering of the single frequency in accordance with the second embodiment of the present invention; [35] Fig.
  • FIG. 13 depicts a detailed configuration of the FSS unit cell for the filtering of the single frequency in accordance with the second embodiment of the present invention
  • Fig. 14 is a cross-sectional view of the FSS unit cell for the filtering of the single frequency having a bandstop function in accordance with the second embodiment of the present invention
  • Fig. 15 is a view showing resonant frequency characteristics of the spatial filter composed of the FSS unit cell shown in Fig. 12 for the filtering of the single frequency in accordance with the second embodiment of the present invention
  • Fig. 16 is a view showing resonant frequency characteristics of the spatial filter composed of the FSS unit cell shown in Fig. 13 for the filtering of the single frequency in accordance with the second embodiment of the present invention. Best Mode for Carrying Out the Invention
  • Fig.l is a view showing an FSS in accordance with a first embodiment of the present invention.
  • the FSS of the present invention are configured in a such manner that a plurality of unit cells 12 composed of conductors are periodically arrayed on an upper side of a thin dielectric layer 11.
  • each unit cell 12 is formed by a dielectric coating layer 13.
  • each unit cell 12 has a structure that a tri-pole and a ternary tree shape loop are coupled without overlapping. This will be set forth in detail in the following embodiment.
  • h indicates a thickness of the dielectric layer 11
  • 1 denotes a relative permittivity of the dielectric layer 11
  • h represents a thickness of the dielectric coating layer 13
  • t implies a thickness of a conductor portion 12 of the unit cell.
  • FIG. 2 is a view showing a unit cell array structure of the FSS in accordance with the first embodiment of the present invention
  • Fig. 3 is a view illustrating a detailed configuration of the unit cell depicted in Fig. 2.
  • the FSS of the present invention is implemented such that the unit cells 12 are periodically arrayed on the upper side of the dielectric layer 11, each of which includes a tri-pole 21 and a ternary tree type loop 22 connected without overlapping. Accordingly, the FSS of the prevent invention is not affected by the polarization of electromagnetic waves due to the connection of the tri-pole 21 and ternary tree shape loop 22.
  • the FSS of the invention may use, as the unit cells 12, the tri-poles 21 only or the ternary tree type loops 22 only. As shown in Fig. 3, however, if there are adopted the unit cells 12 having the tri-poles 21 arranged without overlapping within the ternary tree type loop 22, resonant frequency characteristics are varied depending on a change of a length of the tri-pole 21 and the ternary tree shape loop 22, and an interval between the tri-pole 21 and ternary tree type loop 22, thereby determining a cut-off frequency band.
  • FIG. 4 illustrates adjacent unit cells depicted in Fig. 2.
  • dy and dx indicate longitudinal and horizontal distances between center points of two unit cells, respectively.
  • g denotes an interval between unit cells;
  • a indicates a width of the tri-pole;
  • w indicates a width of a conductor strip of the ternary tree shape loop;
  • b represents a width of the ternary tree shape loop;
  • angle means an angle at which a center line connecting two unit cells is tilted with respect to a horizontal direction;
  • 1 represents a distance from a center of a unit cell to an endmost portion of the ternary tree shape loop; 1 implies a distance from a center of a unit cell to an endmost portion of the tri-pole;
  • c denotes a distance between the tri-pole and ternary tree shape loop.
  • FIG. 5 shows graphs illustrating resonant frequency characteristics of the FSS for several unit cell structures. These graphs show resonant frequency characteristics in case where the unit cell of FSS is of a tri-pole 510, a ternary tree shape loop 520, and a combined shape 530 of the tri-pole and the ternary tree shape loop in accordance with the present invention, respectively.
  • Table 1 below presents a design condition of the FSS in accordance with the present invention.
  • the unit cells of the FSS consist of the tri-pole 510, there exists a single resonant frequency 511; and if the unit cells of the FSS are formed by the ternary tree shape loop 520, there are two resonant frequencies 521 and 522. Meanwhile, if the unit cells are composed of both 530 of the tri-pole and the ternary tree shape loop in accordance with the present invention, there are three resonant frequencies 531, 532 and 533.
  • the resonant frequencies are all lowered, compared to the conventional instance that uses either the tri-pole or the ternary tree shape loop.
  • This lowering of the resonant frequencies is because an electronic capacitance between the tri-pole and the ternary tree shape loop increases. Accordingly, this leads to a reduction of a size of the unit cell, thereby decreasing an overall size of the FSS.
  • the FSS in accordance with the present invention generates the three resonant frequencies.
  • the first and second order resonant frequencies generated by the ternary tree shape loop are given by reference numerals 61 and 62, and the first order resonant frequency created by the tri-pole is given by reference numeral 63.
  • Fig. 6 offers graphs illustrating variations of the resonant frequency with respect to a thickness of a dielectric coating layer of the FSS in accordance with the first embodiment of the present invention.
  • the FSS in accordance with the first embodiment of the present invention allows the resonant frequencies to be abruptly and then slowly lowered as the thickness h of the dielectric coating layer increases.
  • Fig. 7 provides graphs illustrating variations of the resonant frequency with respect to an interval between the unit cells of the FSS in accordance with the first embodiment of the present invention.
  • the FSS in accordance with the first embodiment of the present invention reduces the interval between the resonant frequencies as the interval g between the unit cells becomes large.
  • Fig. 8 presents graphs showing variations of the resonant frequency with respect to a width of the tri-pole of the FSS in accordance with the first embodiment of the present invention.
  • the FSS in accordance with the first embodiment of the present invention reduces amplitudes of the first and second order resonant frequencies 61 and 62 generated by the ternary tree shape loop as the width a of the tri-pole increases.
  • the cut-off frequency of the FSS in accordance with the present invention can be precisely predicted by deducting the electric capacitance between the tri-pole and the ternary tree shape loop within the unit cell.
  • FIG. 9 shows graphs illustrating analysis results of the FSS in accordance with the present invention, which is manufactured based on frequency bands of the mobile communication service.
  • the center frequencies of the cellular service, the PCS service and the wireless LAN service are 859 MHz, 1,810 MHz and 2,442 MHz, respectively.
  • the FSS in accordance with the first embodiment of the invention having the parameters shown in Table 2 above has resonant frequencies of f (859 MHz), f (1,810 MHz), and f (2,442 MHz); and these resonant frequencies are consistent with the above-stated center frequencies of bands to be blocked.
  • Fig. 10 shows graphs illustrating predicted values and experimental values for the frequency characteristics of the FSS in accordance with the first embodiment of the present invention that has no dielectric coating layer. Namely, Fig. 10 shows a comparison of the predicted values and experimental values for the frequency characteristics of the FSS in accordance with the invention that is designed as type I defined in Table 2 above.
  • reference numeral 110 indicates a predicted frequency characteristic value of the FSS in accordance with the present invention without the dielectric coating layer.
  • Reference numeral 120 (H, H) and 130 (V, V) indicate experimental values for the frequency characteristics of the FSS in accordance with the present invention, respectively, when polarizations of transmission and reception antennas are all horizontal and vertical ones.
  • the frequency characteristic prediction values of the FSS in accordance with the present invention that is designed as type I in Table 2 are relatively precisely consistent with the actually measured experimental values. Accordingly, it is possible to design the FSS that can be precisely resonant at a predetermined cut-off frequency based on the analysis results as shown in Figs. 6 to 8.
  • the FSS in accordance with the present invention is not affected by the polarization of the electromagnetic waves, as shown in Fig. 10.
  • FIG. 11 shows an array of unit cells of FSS for the filtering of a frequency in accordance with a second embodiment of the present invention.
  • the FSS of the invention is comprised of an array of unit cells 1100 (an array of geometrically same unit structures) with a meanderingly bent square shape loop 1110, as shown in Fig. 11.
  • the unit cell 1100 is configured to have a meandrous square shape loop 1110 that is formed by meanderingly bending the square shape loop many times.
  • Each of the unit cells 1100 consists of the meandrous square shape loop 1110 and a portion 1120 excepting the loop 1110.
  • the FSS of invention is operated as a bandstop filter; and conversely if the meandrous square shape loop 1110 is dielectric and the remaining portion 1120 is conductor, the FSS is operated as a bandpass filter.
  • the frequency band to be blocked causes the overall length of the meandrous square shape loop 1110 to be varied based on its bent number of times; and also is adjustable by modifying an interval between loops, an interval between the unit cells 1100, and electrical characteristics such as material and permittivity of dielectric and conductor, thereby tuning the resonant frequency.
  • the meandrous square loop 1110 within each unit cell 1100 accurately has a bilateral symmetric structure and is not affected by the polarization of incident electromagnetic waves. That is, the frequency band to be filtered can be adjusted by varying the length and interval of the meandrous square loops 1110 forming the unit cells 1100 of FSS, the interval between the unit cells 1100, the thickness of the dielectric, the permittivity, etc.
  • the resonant frequency is not affected by the variation of the incident polarization by making the meandrous square loop 1110 constituting the unit cell 1100 symmetrical with respect to both of the longitudinal and horizontal directions.
  • the area of the unit cell 1100 may also be adjusted by modifying the width and bent number of times of the meandrous square loop 1110.
  • Each of the unit cells 1100 in Fig. 11 may be configured, as shown in Figs. 12 and
  • Fig. 14 a cross-sectional view of the FSS unit cells 1200 and 1300 is shown in Fig. 14 as reference numeral 1400.
  • the FSS unit cell 1400 shown in Fig. 14 serves as the bandstop filter, wherein the meandrous square loop 1410 is conductor and the remaining parts 1420 and 1430 are dielectric.
  • the FSS unit cell 1400 is operated as the bandstop filter, it is formed by etching a conductor 1410 on a dielectric board 1420.
  • the dielectric board 1420 and the conductor 1410 may be coated with dielectric to make a dielectric layer 1430.
  • the FSS unit cell 1400 is operated as a bandpass filter, the portions of the dielectric board 1420 and the conductor 1410 are changed to each other. In such a case, however, the dielectric coating layer 1430 is not changed.
  • the meandrous square loop 1410 in order to make the resonant frequency of the FSS unit cell 1400 lowered, should be extended, meaning that the bent number of times thereof is great, and of the dielectric layer 1430 should be high. In other words, the more the meandrous square loop 1410 is long and of the dielectric layer 1430 is high, the more the resonant frequency is low.
  • reference numeral v 1200 indicates a unit cell
  • reference numeral v 1210 represents a meandrous square loop
  • reference numeral v 1220 v denotes portions excepting the loop 1210 in the unit cell 1200.
  • the FSS unit cell 1200 in Fig. 12 is operated as the bandstop filter. Conversely, if the meandrous square loop 1210 is dielectric and the rest portion 1220 (strictly, the dielectric board 1420 shown in Fig. 14) is conductor, the FSS unit cell 1200 in Fig. 12 is operated as the bandpass filter. However, in case where the FSS is operated as the frequency- selective filter for bandstop or bandpass, there is no change of the dielectric coating layer 1430 shown in Fig. 14 among the portions 1220 excepting the meandrous square loop 1210.
  • the unit cell 1200 of the FSS having the meandrous square loop 1210 has the same area as that of the first prior art having the general square loop merely as introduced early, the resonant frequency can be lowered, compared to the first prior art, since the length of the loop 1210 is extended. Therefore, if the FSS unit cell 1200 shown in Fig. 12 has the same resonant frequency as that of the first prior art, the size of the unit cell can be further reduced.
  • Fig. 15 shows a comparison of simulation result and actual experimental result when the FSS unit cell 1200 in Fig. 12 is designed as the bandstop filter.
  • Detailed parameters used when the FSS unit cell 1200 is designed as the bandstop filter are defined below in Table 4.
  • the cut-off center frequency of the FSS is fixed to 1.81 GHz that is a center frequency of the domestic PCS band.
  • the area of the FSS unit cell 1200 in Fig. 12 can be adjusted by varying the width and the bent number of times of the meandrous square loop 1210 of the FSS unit cell 1200, as shown in Fig. 13. Namely, the size of the FSS unit cell 1200 can be reduced by more greatly setting the width and the bent number of times of the meandrous square loop 1210. Accordingly, if the FSS unit cell 1300 shown in Fig. 13 has the same size as that of the unit cell 1200 in Fig. 12, the resonant frequency can be more lowered.
  • reference numeral v 1300 v indicates a unit cell
  • reference numeral "1310” represents a meandrous square loop
  • reference numeral v 1320" denotes portions excepting the loop 1310 in the unit cell 1300.
  • the FSS unit cell 1300 depicted in Fig. 13 is constructed such that its size is smaller, while maintaining the same resonant frequency as that of the FSS unit cell in Fig. 12. That is, the FSS unit cell 1300 in Fig. 13 has a narrower meandrous square loop 1310 with once more bent shape 330 while maintaining the same shape as that of the FSS unit cell 1200 in Fig. 12. By doing so, the size of the FSS unit cell 1300 in Fig. 13 can be smaller than that of Fig. 12. If the sizes of the FSS unit cells in Figs. 12 and 13 are the same, the resonant frequency of the FSS unit cell 1300 in Fig. 13 can be lowered, compared to that of Fig. 12.
  • the FSS unit cell 1300 of Fig. 13 if the meandrous square loop 1310 is conductor and the remaining portion 1320 (strictly, the dielectric board 1420 shown in Fig. 14) is dielectric, the FSS unit cell 1300 in Fig. 13 is operated as the bandstop filter. Conversely, in the FSS unit cell 1300 of Fig. 13, if the meandrous square loop 1310 is dielectric and the remaining portion 1320 (strictly, the dielectric board 1420 shown in Fig. 14) is conductor, the FSS unit cell 1300 in Fig. 13 is operated as the bandpass filter. However, in case where the FSS is operated as the frequency-selective filter for bandstop or bandpass, there is no change of the dielectric coating layer 1430 in Fig. 14 among the portions 1320 excepting the meandrous square loop 1310.
  • Fig. 16 shows a comparison of simulation result and actual experimental result when the FSS unit cell 1300 in Fig. 13 is designed as the bandstop filter. Detailed parameters used when the FSS unit cell 1300 is designed as the bandstop filter are defined below in Table 5. In Fig. 16, the bandstop center frequency of the FSS is also fixed to 1.81 GHz that is a center frequency of the domestic PCS band. [105] Table 5

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne une surface à sélectivité de fréquence (FSS) destinée à filtrer une bande de fréquence et son procédé de conception. La FSS de l'invention comprend une couche diélectrique et une pluralité de cellules unitaires. Ces cellules unitaires sont périodiquement disposées en réseau sur une extrémité supérieure de la couche diélectrique, chacune de ces cellules unitaires possédant un tripôle et une boucle de type arbre ternaire reliés sans chevauchement. Par ailleurs, le procédé de l'invention consiste à plier au moins une fois une boucle de forme carrée en vue de l'obtention d'une boucle de forme carrée méandrique lors de la formation des cellules unitaires dans la FSS, et à agencer les cellules unitaires de sorte que la FSS soit constituée de structures ou cellules unitaires géométriquement identiques en vue du réglage d'une fréquence de résonance.
PCT/KR2006/000934 2005-03-15 2006-03-15 Surface a selectivite de frequence pour le filtrage d'une bande de frequence et son procede de conception WO2006098587A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008501812A JP2008536366A (ja) 2005-03-15 2006-03-15 周波数帯域フィルタリングのための周波数選択反射器及びその設計方法

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020050021383A KR100632298B1 (ko) 2005-03-15 2005-03-15 다중 주파수 대역 차단용 주파수 선택 반사기
KR10-2005-0021383 2005-03-15
KR10-2005-0041180 2005-05-17
KR1020050041180A KR100682996B1 (ko) 2005-05-17 2005-05-17 단일 주파수 대역 필터링을 위한 fss 구조

Publications (1)

Publication Number Publication Date
WO2006098587A1 true WO2006098587A1 (fr) 2006-09-21

Family

ID=36991916

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2006/000934 WO2006098587A1 (fr) 2005-03-15 2006-03-15 Surface a selectivite de frequence pour le filtrage d'une bande de frequence et son procede de conception

Country Status (2)

Country Link
JP (1) JP2008536366A (fr)
WO (1) WO2006098587A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8098213B2 (en) 2006-07-07 2012-01-17 Electronics And Telecommunications Research Institute Frequency selective surface structure for filtering of single frequency band
CN102683790A (zh) * 2012-04-27 2012-09-19 西安空间无线电技术研究所 曲面频率选择面激光刻蚀方法
CN102810753A (zh) * 2011-06-29 2012-12-05 深圳光启高等理工研究院 超材料
CN104409845A (zh) * 2014-11-27 2015-03-11 张永超 一种天线罩
US9030373B2 (en) 2011-10-07 2015-05-12 Electronics And Telecommunications Research Institute Transparent film for reducing electromagnetic waves and method of manufacturing the same
CN107093800A (zh) * 2017-04-14 2017-08-25 东南大学 一种传输型人工电磁表面及其设计方法
CN107565223A (zh) * 2017-07-05 2018-01-09 南京航空航天大学 一种超宽带全极化隐身随机表面及其设计方法
CN107732378A (zh) * 2017-10-18 2018-02-23 西安天和防务技术股份有限公司 倍频空间滤波器
CN108414839A (zh) * 2017-12-25 2018-08-17 上海市计量测试技术研究院 一种基于fss的谐振法复介电常数测量系统
CN108886199A (zh) * 2016-04-08 2018-11-23 三菱电机株式会社 频率选择板的谐振元件、频率选择板及天线装置
CN112038760A (zh) * 2020-02-29 2020-12-04 华南理工大学 一种基于交互嵌入式超表面结构的宽带小型化天线
US11133601B2 (en) * 2016-04-14 2021-09-28 University Of Florida Research Foundation, Incorporated Fractal-rectangular reactive impedance surface for antenna miniaturization

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6142522B2 (ja) * 2012-12-20 2017-06-07 横浜ゴム株式会社 周波数選択部材および曲面への周波数選択素子の配列決定方法
JP6722601B2 (ja) * 2017-01-11 2020-07-15 日本電信電話株式会社 電磁界バンドフィルタ
JP7041870B2 (ja) * 2017-10-30 2022-03-25 学校法人上智学院 周波数選択板付きｒｆｉｄタグ及び電子レンジ加熱用容器
CN109616724B (zh) * 2018-12-11 2019-11-08 四川众为创通科技有限公司 基于双开口谐振环的小型化频率选择表面

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6400339B1 (en) * 1998-05-18 2002-06-04 Allgon Ab Antenna device comprising capacitively coupled radiating elements and a hand-held radio communication device for such antenna device
US20030006940A1 (en) * 2001-05-16 2003-01-09 Takanori Washiro Line-shaped antenna
US6670932B1 (en) * 2000-11-01 2003-12-30 E-Tenna Corporation Multi-resonant, high-impedance surfaces containing loaded-loop frequency selective surfaces
US6806843B2 (en) * 2002-07-11 2004-10-19 Harris Corporation Antenna system with active spatial filtering surface

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10126090A (ja) * 1996-10-21 1998-05-15 Kajima Corp 電磁シールドフィルム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6400339B1 (en) * 1998-05-18 2002-06-04 Allgon Ab Antenna device comprising capacitively coupled radiating elements and a hand-held radio communication device for such antenna device
US6670932B1 (en) * 2000-11-01 2003-12-30 E-Tenna Corporation Multi-resonant, high-impedance surfaces containing loaded-loop frequency selective surfaces
US20030006940A1 (en) * 2001-05-16 2003-01-09 Takanori Washiro Line-shaped antenna
US6806843B2 (en) * 2002-07-11 2004-10-19 Harris Corporation Antenna system with active spatial filtering surface

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PARKER E.A. AND EL-SHEIKH A.N.A., IEEE PROCEEDINGS-H, vol. 138, no. 1, February 1991 (1991-02-01), pages 19 - 22 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8098213B2 (en) 2006-07-07 2012-01-17 Electronics And Telecommunications Research Institute Frequency selective surface structure for filtering of single frequency band
CN102810753A (zh) * 2011-06-29 2012-12-05 深圳光启高等理工研究院 超材料
CN102810753B (zh) * 2011-06-29 2016-05-04 深圳光启高等理工研究院 超材料
US9030373B2 (en) 2011-10-07 2015-05-12 Electronics And Telecommunications Research Institute Transparent film for reducing electromagnetic waves and method of manufacturing the same
CN102683790A (zh) * 2012-04-27 2012-09-19 西安空间无线电技术研究所 曲面频率选择面激光刻蚀方法
CN102683790B (zh) * 2012-04-27 2014-05-28 西安空间无线电技术研究所 曲面频率选择面激光刻蚀方法
CN104409845A (zh) * 2014-11-27 2015-03-11 张永超 一种天线罩
CN108886199A (zh) * 2016-04-08 2018-11-23 三菱电机株式会社 频率选择板的谐振元件、频率选择板及天线装置
US11133601B2 (en) * 2016-04-14 2021-09-28 University Of Florida Research Foundation, Incorporated Fractal-rectangular reactive impedance surface for antenna miniaturization
CN107093800A (zh) * 2017-04-14 2017-08-25 东南大学 一种传输型人工电磁表面及其设计方法
CN107565223A (zh) * 2017-07-05 2018-01-09 南京航空航天大学 一种超宽带全极化隐身随机表面及其设计方法
CN107732378B (zh) * 2017-10-18 2020-03-31 西安天和防务技术股份有限公司 倍频空间滤波器
CN107732378A (zh) * 2017-10-18 2018-02-23 西安天和防务技术股份有限公司 倍频空间滤波器
CN108414839A (zh) * 2017-12-25 2018-08-17 上海市计量测试技术研究院 一种基于fss的谐振法复介电常数测量系统
CN108414839B (zh) * 2017-12-25 2023-09-05 上海市计量测试技术研究院 一种基于fss的谐振法复介电常数测量系统
CN112038760A (zh) * 2020-02-29 2020-12-04 华南理工大学 一种基于交互嵌入式超表面结构的宽带小型化天线
CN112038760B (zh) * 2020-02-29 2021-11-19 华南理工大学 一种基于交互嵌入式超表面结构的宽带小型化天线

Also Published As

Publication number Publication date
JP2008536366A (ja) 2008-09-04

Similar Documents

Publication Publication Date Title
WO2006098587A1 (fr) Surface a selectivite de frequence pour le filtrage d'une bande de frequence et son procede de conception
US6195048B1 (en) Multifrequency inverted F-type antenna
Bouslama et al. Beam-switching antenna with a new reconfigurable frequency selective surface
US6774866B2 (en) Multiband artificial magnetic conductor
KR101431724B1 (ko) 방사효율을 향상시키고 신호간섭을 방지하는 차량용 방송안테나 및 이를 내부에 구비하는 차량용 샤크핀 안테나 장치
US6459413B1 (en) Multi-frequency band antenna
EP3616255B1 (fr) Structure ebg, composant ebg et dispositif d'antenne
US7663551B2 (en) Multiband antenna apparatus and methods
US6366254B1 (en) Planar antenna with switched beam diversity for interference reduction in a mobile environment
US8368614B2 (en) Antenna apparatus and wireless communication device
Haraz et al. UWB antennas for wireless applications
EP2178166B1 (fr) Antenne à boucle incluant un espace de réglage d'impédance et procédés associés
KR100826879B1 (ko) 기생 소자에 의한 주파수 노치 기능을 갖는 초광대역안테나
KR20090060802A (ko) 다중 주파수 대역용 주파수 선택 반사기(ｆｓｓ) 구조
KR100632298B1 (ko) 다중 주파수 대역 차단용 주파수 선택 반사기
Dey et al. Conformal miniaturized angular stable triband frequency selective surface for EMI shielding
EP2323217B1 (fr) Antenne pour communication mimo multimodale dans des dispositifs portables
KR100962930B1 (ko) 1／4크기의 슬롯 초광대역 안테나 및 그 제조방법
Chen et al. Antenna gain and bandwidth enhancement using frequency selective surface with double rectangular ring elements
JP2003298339A (ja) 積層誘電体アンテナ
KR101049724B1 (ko) 독립 조절이 가능하고 절곡부를 가지는 다중 대역 안테나
KR100682996B1 (ko) 단일 주파수 대역 필터링을 위한 fss 구조
Sen et al. Design of a wide band Frequency Selective Surface (FSS) for multiband operation of reflector antenna
Chatterjee et al. A polarization independent compact multi-band frequency selective surface
Li et al. Amplitude controlled reflectarray using non-uniform FSS reflection plane

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2008501812

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 06716384

Country of ref document: EP

Kind code of ref document: A1