EP4670232A1 - Antenne de filtrage en métamatériau - Google Patents

Antenne de filtrage en métamatériau

Info

Publication number
EP4670232A1
EP4670232A1 EP24720875.4A EP24720875A EP4670232A1 EP 4670232 A1 EP4670232 A1 EP 4670232A1 EP 24720875 A EP24720875 A EP 24720875A EP 4670232 A1 EP4670232 A1 EP 4670232A1
Authority
EP
European Patent Office
Prior art keywords
metamaterial
shaped slot
semi
triangular shape
bowtie
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.)
Pending
Application number
EP24720875.4A
Other languages
German (de)
English (en)
Inventor
Maliheh KHATIBI MOGHADDAM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minwave Technologies Sa
Original Assignee
Minwave Technologies Sa
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
Application filed by Minwave Technologies Sa filed Critical Minwave Technologies Sa
Publication of EP4670232A1 publication Critical patent/EP4670232A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/20—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/28—Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements or conductive elements forming artificial dielectric
    • 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
    • H01Q15/006—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces
    • 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
    • H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters

Definitions

  • the present disclosure generally relates to antennas, and particularly, to metamaterial based antennas.
  • BACKGROUND ART [0002]
  • the use of satellite communication and telecommunication services is in constant progress. The trend is to miniaturize the chain of reception and emission in embedded systems to avoid too much weight for a satellite, for example, and to reduce a volume occupied by all different devices. This may lead to finding a way to compress radiofrequency (RF) parts of a transmitter/emitter, which may be particularly interesting for transceiver elements that are not integrated in a monolithic way, such as an antenna and filters at a front end.
  • RF filters may usually be placed right after antennas.
  • filtering antenna Since size reduction and low profile structure are a trend in circuit design, it is desired to integrate highly selective band-pass filters and antennas in single modules, referred to as “filtering antenna”, with passing the desired frequencies, rejecting out-of-band interferences, and radiating functions simultaneously.
  • filtering antenna With passing the desired frequencies, rejecting out-of-band interferences, and radiating functions simultaneously.
  • Newer generations of satellite systems may use active or passive antennas with steerable patterns or beams. Having electronically steerable array antennas may need to have low spacing between antenna units, for example, less than a half of a wavelength. This requirement may be difficult to achieve using conventional technologies, such as hollow waveguides and horn antennas.
  • steerable phased array antennas using other technologies, such as dielectric antennas or planar antennas may result in less efficiency.
  • Metamaterials are artificial materials that exhibit negative permittivity and/or permeability. Metamaterials may also be inherently resonant, i.e., they may strongly shape electromagnetic radiation at a certain range of frequencies. Due to the ability in subwavelength manipulation of electromagnetic radiation, metamaterials have been utilized for designing electromagnetic radiation filters [US Patents no.10,620,343 B2 and 10,996,385 B2]. This may encourage using metamaterials to design filtering antennas. However, metamaterial filters may demonstrate a very narrowband transmission, high loss, and high group velocity dispersion (GVD) around a resonance frequency.
  • VGD group velocity dispersion
  • a guided mode that may be created inside a bandgap of resonant metamaterials may limit a passband and/or rejection band of designed filters to the bandgap of resonant metamaterials.
  • small metamaterial elements cannot be used easily as an antenna and may radiate in a wide frequency band with high efficiency [0005]
  • a microwave and millimeter wave antenna that may be easily fabricated with a low loss, wide band, and a highly miniaturized size.
  • an efficient microwave and millimeter wave antenna that may be integrated with a band-pass filter in a single module.
  • An exemplary metamaterial filtering antenna may include a host waveguide, one or more metamaterial resonant elements, a feed port, and a radiation port.
  • An exemplary one or more metamaterial resonant elements may be arranged inside the host waveguide.
  • each of the one or more metamaterial resonant elements may be electromagnetically coupled to at least one adjacent metamaterial resonant element of the one or more metamaterial resonant elements by being placed at a subwavelength distance from at least one adjacent metamaterial resonant element.
  • An exemplary feed port may be coupled to a first side of the host waveguide. In an exemplary embodiment, the feed port may be configured to couple a primary radiofrequency (RF) signal to the host waveguide.
  • RF radiofrequency
  • An exemplary radiation port may be coupled to a second side of the host waveguide. An exemplary second side may oppose the first side.
  • An exemplary radiation port may be configured to receive an electromagnetic wave from the host waveguide and radiate the electromagnetic wave to outside the metamaterial filtering antenna.
  • An exemplary electromagnetic wave may be generated by the one or more metamaterial resonant elements through filtering the primary RF signal.
  • An exemplary metamaterial filtering antenna may further include a dielectric cover that may be attached to the radiation port.
  • the radiation port may include a conductive sheet and a slot.
  • An exemplary conductive sheet may be attached at the second side between a third side of the host waveguide and a fourth side of the host waveguide.
  • An exemplary third side may oppose the fourth side.
  • An exemplary slot may be etched on the conductive sheet and may be configured to be electromagnetically coupled to at least one of the one or more metamaterial resonant elements by being positioned at a subwavelength distance from at least one of the one or more metamaterial resonant elements.
  • An exemplary slot may include an H-shaped slot that may be etched at a center of the conductive sheet.
  • An exemplary one or more metamaterial resonant elements may include an array of metallic pins that may be arranged along a straight line inside the host waveguide. An exemplary last metallic pin of the array of metallic pins may be placed at a subwavelength distance from the H-shaped slot.
  • An exemplary slot may include a horizontal bowtie-shaped slot that may be etched at a center of the conductive sheet. An exemplary horizontal bowtie-shaped slot may be associated with a horizontal polarization of the metamaterial filtering antenna.
  • the horizontal bowtie-shaped slot may include a first semi-triangular shape, a second semi-triangular shape, and a horizontal axis.
  • An exemplary second semi-triangular shape may coincide with the first semi-triangular shape at a central point of the horizontal bowtie-shaped slot.
  • An exemplary horizontal axis may pass through the central point.
  • each of the first semi-triangular shape and the second semi-triangular shape may be symmetric with respect to the horizontal axis.
  • the one or more metamaterial resonant elements may include one or more metal sheets that may be sequentially arranged inside the host waveguide parallel with the conductive sheet.
  • each respective metal sheet of the one or more metal sheets may include a respective horizontal bowtie-shaped slot that may be etched at a center of the respective metal sheet.
  • An exemplary respective horizontal bowtie-shaped slot may include a respective first semi-triangular shape, a respective second semi-triangular shape, and a respective horizontal axis.
  • An exemplary respective second semi-triangular shape may coincide with the respective first semi-triangular shape at a respective central point of the respective horizontal bowtie- shaped slot.
  • An exemplary respective horizontal axis may be parallel with the first horizontal axis and may pass through the respective central point.
  • each of the respective first semi-triangular shape and the respective second semi-triangular shape may be symmetric with respect to the respective horizontal axis.
  • An exemplary slot may further include a vertical bowtie-shaped slot that may be etched at the center of the conductive sheet.
  • An exemplary vertical bowtie-shaped slot may be associated with a vertical polarization of the metamaterial filtering antenna.
  • the vertical bowtie-shaped slot may include a third semi-triangular shape, a fourth semi-triangular shape, and a vertical axis.
  • An exemplary fourth semi-triangular shape may coincide with the third semi-triangular shape at the central point.
  • An exemplary vertical axis may pass through the central point and may be perpendicular to the horizontal axis.
  • each of the third semi-triangular shape and the fourth semi-triangular shape may be symmetric with respect to the vertical axis.
  • each respective metal sheet of the one or more metal sheets may further include a respective vertical bowtie-shaped slot that may be etched at the center of the respective metal sheet.
  • An exemplary respective vertical bowtie-shaped slot may include a respective third semi-triangular shape, a respective fourth semi-triangular shape, and a respective vertical axis.
  • An exemplary respective fourth semi-triangular shape may coincide with the respective third semi-triangular shape at the respective central point.
  • An exemplary respective vertical axis may pass through the respective central point and may be perpendicular to the respective horizontal axis.
  • each of the respective third semi-triangular shape and the respective fourth semi-triangular shape may be symmetric with respect to the respective vertical axis.
  • the feed port may include a ground plane, a dielectric substrate, a metal patch, a via, and a microstrip feed line.
  • An exemplary ground plane may be attached to the first side and may be electrically coupled to the host waveguide at the first side.
  • An exemplary dielectric substrate may be attached to a top surface of the ground plane between the ground plane and the host waveguide.
  • An exemplary metal patch may be attached to a top surface of the dielectric substrate between the dielectric substrate and the host waveguide and may be configured to be electromagnetically coupled to at least one metamaterial resonant element of the one or more metamaterial resonant elements by being positioned at a subwavelength distance from at least one metamaterial resonant element.
  • An exemplary via may be extended from the ground plane to the metal patch through the dielectric substrate.
  • An exemplary microstrip feed line may pass through the via and may be configured to couple the primary RF signal to the host waveguide by being connected to the metal patch.
  • the microstrip feed line may be associated with a horizontal polarization of the metal patch.
  • An exemplary feed port may further include an additional via and an additional microstrip feed line.
  • An exemplary additional via may be extended from the ground plane to the metal patch through the dielectric substrate.
  • An exemplary additional microstrip feed line may pass through the additional via and may be configured to couple a secondary RF signal to the host waveguide by being connected to the metal patch.
  • An exemplary secondary RF signal may be independent from the primary RF signal.
  • the additional microstrip feed line may be associated with a vertical polarization of the metal patch.
  • FIG.1A shows a schematic of a metamaterial filtering antenna, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG.1B shows a schematic of a three-dimensional (3D) cross-section of a metamaterial filtering antenna with an insulating cover, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 2 shows a schematic of different implementations of a radiation port, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 3A shows a schematic of a 3D cross-section of a metamaterial filtering antenna with an H-shaped slot, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 3B shows a schematic of a front view of a radiation port with an H-shaped slot, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 4A shows a schematic of an exploded view of a metamaterial filtering antenna with bowtie-shaped slots, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG. 4B shows a schematic of a front view of a horizontal bowtie-shaped slot, consistent with one or more exemplary embodiments of the present disclosure.
  • FIG.4C shows a schematic of a front view of a vertical bowtie-shaped slot, consistent with one or more exemplary embodiments of the present disclosure.
  • DESCRIPTION OF EMBODIMENTS [0026]
  • numerous specific details are set forth by way of examples in order to provide a thorough understanding of the relevant teachings. However, it should be apparent that the present teachings may be practiced without such details. In other instances, well known methods, procedures, components, and/or circuitry have been described at a relatively high-level, without detail, in order to avoid unnecessarily obscuring aspects of the present teachings.
  • An exemplary metamaterial filtering antenna may include a host waveguide that is attached to a feed port and a radiation port.
  • An exemplary feed port may deliver a radio frequency (RF) signal to the host waveguide to be filtered and be radiated outside the antenna through the radiation port.
  • An exemplary host waveguide may include a number of metamaterial resonant elements that may be sequentially arranged inside the waveguide so that a metamaterial structure with an exemplary passband and stopband may be obtained.
  • An exemplary bandwidth of the filter may be tuned by changing the specifications (such as arrangement, height, inter-distance, etc.) of the metamaterial resonant elements.
  • An exemplary radiation port may include slots that may be etched on a conductive sheet.
  • An exemplary slot may be electromagnetically coupled to the metamaterial resonant elements so that energy of an exemplary RF signal may be received at the slot from the metamaterial resonant elements and may be radiated outwards through the slot.
  • An exemplary slot may have several different shapes, such as a square shape, a rectangular shape, a cross shape, an H shape, a bowtie shape, or a pair of orthogonal bowtie shapes coinciding at a center of the shapes.
  • An exemplary pair of orthogonal slots may provide a dual polarization capability for the antenna.
  • FIG.1A shows a schematic of a metamaterial filtering antenna, consistent with one or more exemplary embodiments of the present disclosure.
  • An exemplary metamaterial filtering antenna 100 may include a host waveguide 102, one or more metamaterial resonant elements 104, a feed port 106, and a radiation port 108.
  • one or more metamaterial resonant elements 104 may be arranged inside host waveguide 102.
  • each of one or more metamaterial resonant elements 104 may be electromagnetically coupled to at least one adjacent metamaterial resonant element of one or more metamaterial resonant elements 104 by being placed at a subwavelength distance from at least one adjacent metamaterial resonant element.
  • a “subwavelength distance” may refer to a distance less than about ⁇ ⁇ /4 where ⁇ ⁇ is an operating wavelength of metamaterial filtering antenna 100.
  • wavelength ⁇ ⁇ may be equal to ⁇ /( ⁇ ⁇ ⁇ ⁇ ) where ⁇ is the speed of light, ⁇ is a permittivity of material (such as air, silicon, etc.) that may fill host waveguide 102, and ⁇ ⁇ an operating frequency of metamaterial filtering antenna 100.
  • a metamaterial resonant element 110 may be placed at a subwavelength distance 112 from an adjacent metamaterial resonant element 114.
  • a “metamaterial resonant element” may refer to a subwavelength component within a metamaterial structure designed to exhibit resonance at specific frequencies, enabling wave manipulation.
  • Exemplary metamaterial resonant elements may interact by propagating waves and radiations since they are open resonators.
  • one or more metamaterial resonant elements 104 may locally resonate in host waveguide 102 which may create a passband and a stopband. Each exemplary resonance may generate a high unloaded Q pole and deep zero with critical coupling to an adjacent resonator.
  • one or more metamaterial resonant elements 104 may make a bandgap artificial material that may provide a deep and sharp metamaterial bandgap (that is, negative permittivity and/or negative permeability) right after an exemplary passband.
  • one or more metamaterial resonant elements 104 may be coupled via electric and magnetic fields (or modal electric and magnetic fields) generated by one or more metamaterial resonant elements 104.
  • energy may be coupled between or from one metamaterial resonant element to another by this coupling.
  • host waveguide 102 may be configured to support evanescent modes or waves of microwave or millimeter electromagnetic wave.
  • each of a width 115A and a height 115B of host waveguide 102 may be smaller than ⁇ ⁇ /2.
  • host waveguide 102 may have a waveguide cut-off frequency ⁇ ⁇ below which host waveguide 102 may not support a propagating mode or wave.
  • no transverse electric TE mode of microwave or millimeter electromagnetic wave may be propagated in host waveguide 102 below cut-off frequency ⁇ ⁇ .
  • cut-off frequency ⁇ ⁇ may refer to a lowest cutoff frequency of host waveguide 102 in an absence of any metamaterial resonant element inside host waveguide 102.
  • An exemplary resonance frequency ⁇ ⁇ of each of one or more metamaterial resonant elements 104 may be less than cut-off frequency ⁇ ⁇ .
  • feed port 106 may be coupled to a first side 116 of host waveguide 102.
  • feed port 106 may be configured to couple a primary RF signal to host waveguide 102.
  • radiation port 108 may be coupled to a second side 118 of host waveguide 102.
  • second side 118 may oppose first side 116.
  • radiation port 108 may be configured to receive an electromagnetic wave from host waveguide 102 and radiate the electromagnetic wave to outside metamaterial filtering antenna 100.
  • An exemplary electromagnetic wave may be generated by one or more metamaterial resonant elements 104 through filtering the primary RF signal.
  • radiation port 108 may include a conductive sheet 120 and a slot 122.
  • conductive sheet 120 may be attached at second side 118 between a third side 124 of host waveguide 102 and a fourth side 126 of host waveguide 102.
  • third side 124 may oppose fourth side 126.
  • conductive sheet 120 may be made of metal.
  • slot 122 may be etched on conductive sheet 120 and may be configured to be electromagnetically coupled to at least one of one or more metamaterial resonant elements 104 by being positioned at a subwavelength distance from at least one of one or more metamaterial resonant elements 104.
  • FIG.1B shows a schematic of a three-dimensional (3D) cross-section of a metamaterial filtering antenna with an insulating cover, consistent with one or more exemplary embodiments of the present disclosure.
  • An exemplary metamaterial filtering antenna 132 may be similar to metamaterial filtering antenna 100 and may include similar elements.
  • metamaterial filtering antenna 132 may include a host waveguide 134 (similar to host waveguide 102) and a radiation port 136 (similar to radiation port 108).
  • metamaterial filtering antenna 132 may further include a dielectric cover 138 that may be attached to radiation port 136.
  • dielectric cover 138 may be an insulator and may be configured to protect radiation port 108 and its elements. In an exemplary embodiment, dielectric cover 138 may also enhance radiation efficiency and a gain of metamaterial filtering antenna 132.
  • FIG. 2 shows a schematic of different implementations of a radiation port, consistent with one or more exemplary embodiments of the present disclosure. Exemplary radiation ports 202, 204, 205, 206, and 207 may respectively have slots 208 (etched on a conductive sheet 209), 210 (etched on a conductive sheet 211), 212 (etched on a conductive sheet 213), 214 (etched on a conductive sheet 215), and 216 (etched on a conductive sheet 217).
  • slots 208, 210, 212, 214, and 216 may have different shapes. However, an exemplary perimeter of slots 208, 210, 212, 214, and 216 may be in a range of about 0.4 ⁇ ⁇ to 1.4 ⁇ ⁇ . In an exemplary embodiment, a “perimeter” of a slot may refer to a length of a boundary of a geometric shape of the slot. [0037] FIG. 3A shows a schematic of a 3D cross-section of a metamaterial filtering antenna with an H-shaped slot, consistent with one or more exemplary embodiments of the present disclosure. Referring to FIGs.
  • an exemplary metamaterial filtering antenna 300 may be similar to metamaterial filtering antenna 100 and may include similar elements.
  • metamaterial filtering antenna 300 may include a host waveguide 302 (similar to host waveguide 102), one or more metamaterial resonant elements 304 (similar to one or more metamaterial resonant elements 104), and a radiation port 306 (similar to radiation port 108).
  • An exemplary feed port of metamaterial filtering antenna 300 is not shown in FIG. 3.
  • radiation port 306 may include a conductive sheet 308 (similar to conductive sheet 120) and a slot (similar to slot 122).
  • An exemplary slot may include an H- shaped slot 310 that may be etched at a center of conductive sheet 308.
  • one or more metamaterial resonant elements 304 may include an array of metallic pins that may be arranged along a straight line 312 inside host waveguide 302.
  • An exemplary last metallic pin 314 of the array of metallic pins may be placed at a subwavelength distance from H-shaped slot 310.
  • FIG. 3B shows a schematic of a front view of a radiation port with an H-shaped slot, consistent with one or more exemplary embodiments of the present disclosure. Referring to FIGs.
  • dimensions of metamaterial filtering antenna 300 may satisfy a set of conditions defined by the following: 0 .2 ⁇ ⁇ ⁇ ⁇ ⁇ 0.6 ⁇ ⁇ Inequation (1a) 0.05 ⁇ ⁇ ⁇ ⁇ ⁇ 0.2 ⁇ ⁇ Inequation (1b) ⁇ ⁇ ⁇ ⁇ 0.1 ⁇ ⁇ Inequation (1c) 0.05 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 0.5 ⁇ ⁇ Inequation (1d) 0.05 ⁇ ⁇ ⁇ h ⁇ 0.4 ⁇ ⁇ Inequation (1e) 0 .4 ⁇ ⁇ ⁇ ⁇ ⁇ 1.2 ⁇ ⁇ Inequation (1f) 0.05 ⁇ ⁇ ⁇ h ⁇ ⁇ 0.25 ⁇ ⁇ Inequation (1g) 0.02 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 0.2 ⁇ ⁇ Inequation (1h) where ⁇ represents each
  • FIG. 4A shows a schematic of an exploded view of a metamaterial filtering antenna with bowtie-shaped slots, consistent with one or more exemplary embodiments of the present disclosure. Referring to FIGs.
  • an exemplary metamaterial filtering antenna 400 may be similar to metamaterial filtering antenna 100 and may include similar elements.
  • metamaterial filtering antenna 400 may include a host waveguide 402 (similar to host waveguide 102), one or more metamaterial resonant elements 404 (similar to one or more metamaterial resonant elements 104), a feed port 406 (similar to radiation port 106), and a radiation port 408 (similar to radiation port 108).
  • radiation port 408 may include a conductive sheet 410 (similar to conductive sheet 120) and a slot (similar to slot 122).
  • An exemplary slot may include a horizontal bowtie-shaped slot 412 that may be etched at a center of conductive sheet 410.
  • horizontal bowtie- shaped slot 412 may produce a horizontal polarization of metamaterial filtering antenna 400.
  • a “horizontal polarization” of metamaterial filtering antenna 400 may refer to a direction of electromagnetic fields produced by metamaterial filtering antenna 400 as energy radiates away from radiation port 108 through horizontal bowtie-shaped slot 412.
  • FIG. 4B shows a schematic of a front view of a horizontal bowtie-shaped slot, consistent with one or more exemplary embodiments of the present disclosure.
  • horizontal bowtie-shaped slot 412 may include a first semi-triangular shape 414, a second semi-triangular shape 416, and a horizontal axis 418.
  • second semi-triangular shape 416 may coincide with first semi-triangular shape 414 at a central point 420 of horizontal bowtie-shaped slot 412.
  • horizontal axis 418 may pass through central point 420.
  • each of first semi- triangular shape 414 and second semi-triangular shape 416 may be symmetric with respect to horizontal axis 418.
  • one or more metamaterial resonant elements 404 may include one or more metal sheets (for example, a metal sheet 422) that may be sequentially arranged inside host waveguide 402 parallel with conductive sheet 410.
  • An exemplary last metal sheet (for example, metal sheet 422) of the one or more metal sheets may be placed at a subwavelength from conductive sheet 410.
  • each respective metal sheet of the one or more metal sheets may include a respective horizontal bowtie-shaped slot that may be etched at a center of the respective metal sheet.
  • metal sheet 422 may include a horizontal bowtie-shaped slot 424 that may be etched at a center of metal sheet 422.
  • horizontal bowtie-shaped slot 424 may be similar to horizontal bowtie-shaped slot 412 and may include similar elements.
  • horizontal bowtie-shaped slot 424 may include a semi-triangular shape similar to first semi-triangular shape 414, a semi-triangular shape similar to second semi-triangular shape 416, and a horizontal axis similar to and parallel with horizontal axis 418.
  • dimensions of metamaterial filtering antenna 400 may satisfy a set of conditions defined by the following: 0 .4 ⁇ ⁇ ⁇ ⁇ ⁇ 06 ⁇ ⁇ Inequation (2a) ⁇ ⁇ ⁇ 0.25 ⁇ ⁇ Inequation (2b) 0.05 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 0.3 ⁇ ⁇ Inequation (2c) 0.15 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 0.25 ⁇ ⁇ Inequation (2d) 0 .01 ⁇ ⁇ ⁇ ⁇ ⁇ 0.1 ⁇ ⁇ Inequation (2e) 0.3 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 0.5 ⁇ ⁇ Inequation (2f) ⁇ ⁇ ⁇ ⁇ ⁇ 1.4 ⁇ ⁇ Inequation (2g) where ⁇ represents each of a width 426A (similar to width 115A) and a height 426
  • an exemplary slot may further include a vertical bowtie- shaped slot 440 that may be etched at the center of conductive sheet 410.
  • vertical bowtie-shaped slot 440 may produce a vertical polarization of metamaterial filtering antenna 400.
  • a “vertical polarization” of metamaterial filtering antenna 400 may refer to a direction of electromagnetic fields produced by metamaterial filtering antenna 400 as energy radiates away from radiation port 108 through vertical bowtie-shaped slot 440.
  • FIG.4C shows a schematic of a front view of a vertical bowtie-shaped slot, consistent with one or more exemplary embodiments of the present disclosure.
  • vertical bowtie-shaped slot 440 may include a third semi- triangular shape 442, a fourth semi-triangular shape 444, and a vertical axis 446.
  • fourth semi-triangular shape 444 may coincide with third semi- triangular shape 442 at central point 420.
  • vertical axis 446 may pass through central point 420 and may be perpendicular to horizontal axis 418.
  • each of third semi-triangular shape 442 and fourth semi-triangular shape 444 may be symmetric with respect to vertical axis 446.
  • different dimensions of vertical bowtie-shaped slot 440 may be in a similar range to corresponding dimensions of horizontal bowtie-shaped slot 412.
  • each respective metal sheet of the one or more metal sheets may further include a respective vertical bowtie-shaped slot that may be etched at a center of the respective metal sheet.
  • metal sheet 422 may further include a vertical bowtie-shaped slot 448 that may be etched at a center of metal sheet 422.
  • vertical bowtie-shaped slot 448 may be similar to vertical bowtie-shaped slot 440 and may include similar elements.
  • vertical bowtie-shaped slot 448 may include a semi-triangular shape similar to third semi-triangular shape 442, a semi- triangular shape similar to fourth semi-triangular shape 444, and a vertical axis similar to and parallel with vertical axis 446 that may be perpendicular to horizontal axis 418.
  • feed port 406 may include a ground plane 450, a dielectric substrate 452, a metal patch 454, a via 456, and a microstrip feed line 458.
  • ground plane 450 may be attached to a first side 460 (similar to first side 116) of host waveguide 402.
  • ground plane 450 may be made of metal to be electrically coupled to host waveguide 402 at the first side 460.
  • dielectric substrate 452 may be attached to a top surface of ground plane 450 between ground plane 450 and host waveguide 402.
  • metal patch 454 may be attached to a top surface of dielectric substrate 452 between dielectric substrate 452 and host waveguide 402 and may be configured to be electromagnetically coupled to one or more metamaterial resonant elements 404 by being positioned at a subwavelength distance 462 from one or more metamaterial resonant elements 404.
  • a width ⁇ ⁇ 1 and a length ⁇ ⁇ 2 of metal patch 454 may be in a range of about 0.01 ⁇ ⁇ to about 0.3 ⁇ ⁇ .
  • via 456 may be extended from ground plane 450 to metal patch 454 through dielectric substrate 452.
  • microstrip feed line 458 may pass through via 456 and may be configured to couple the primary RF signal to host waveguide 402 by being connected to metal patch 454.
  • microstrip feed line 458 may be associated with a horizontal polarization of metal patch 454, that is, an exemplary energy of the primary RF signal may be transferred from metal patch 454 to horizontal bowtie-shaped slot 412 through horizontal bowtie-shaped slot 424 to be consequently radiated to outside metamaterial filtering antenna 400 through horizontal bowtie- shaped slot 412 in a horizontal direction.
  • feed port 406 may further include an additional via 464 and an additional microstrip feed line 466.
  • additional via 464 may be extended from ground plane 450 to metal patch 454 through dielectric substrate 452.
  • additional microstrip feed line 466 may pass through additional via 464 and may be configured to couple a secondary RF signal to host waveguide 402 by being connected to metal patch 454.
  • An exemplary secondary RF signal may be independent from the primary RF signal.
  • additional microstrip feed line 466 may be associated with a vertical polarization of metal patch 454, that is, an exemplary energy of the secondary RF signal may be transferred from metal patch 454 to vertical bowtie-shaped slot 440 through vertical bowtie-shaped slot 448 to be consequently radiated to outside metamaterial filtering antenna 400 through vertical bowtie-shaped slot 440 in a vertical direction.
  • metamaterial filtering antenna 400 may further include one or more additional dielectric substrates 468 that may be sequentially attached below a bottom surface of ground plane 450.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Waveguide Aerials (AREA)

Abstract

L'invention concerne une antenne de filtrage en métamatériau comprenant un guide d'ondes hôte, une pluralité d'éléments résonants en métamatériau, un port d'alimentation et un port de rayonnement. La pluralité d'éléments résonants en métamatériau sont agencés à l'intérieur du guide d'ondes hôte. Chacun de la pluralité d'éléments résonants en métamatériau est couplé électromagnétiquement à au moins un élément résonant en métamatériau adjacent en étant placé à une distance de sous-longueur d'onde à partir d'au moins un élément résonant en métamatériau adjacent. Le port d'alimentation est couplé à un premier côté du guide d'ondes hôte et est configuré pour coupler un signal radiofréquence (RF) au guide d'ondes hôte. Le port de rayonnement est couplé à un second côté du guide d'ondes hôte et est configuré pour recevoir une onde électromagnétique provenant du guide d'ondes hôte et rayonner l'onde électromagnétique vers l'extérieur de l'antenne de filtrage en métamatériau. L'onde électromagnétique est générée par la pluralité d'éléments résonants en métamatériau par filtrage du signal RF.
EP24720875.4A 2023-02-27 2024-02-26 Antenne de filtrage en métamatériau Pending EP4670232A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202363448351P 2023-02-27 2023-02-27
PCT/IB2024/051811 WO2024180449A1 (fr) 2023-02-27 2024-02-26 Antenne de filtrage en métamatériau

Publications (1)

Publication Number Publication Date
EP4670232A1 true EP4670232A1 (fr) 2025-12-31

Family

ID=90826438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24720875.4A Pending EP4670232A1 (fr) 2023-02-27 2024-02-26 Antenne de filtrage en métamatériau

Country Status (3)

Country Link
EP (1) EP4670232A1 (fr)
CN (1) CN120814116A (fr)
WO (1) WO2024180449A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201117480D0 (en) 2011-10-10 2011-11-23 Palikaras George Filter
US10673147B2 (en) * 2016-11-03 2020-06-02 Kymeta Corporation Directional coupler feed for flat panel antennas
KR101852071B1 (ko) 2016-12-28 2018-04-26 한국과학기술연구원 전자기파 필터를 위한 메타물질
US20230109939A1 (en) * 2020-03-25 2023-04-13 Ecole Polytechnique Federale De Lausanne (Epfl) Microwave or millimeter wave passive components or devices
CN112768921B (zh) * 2020-12-30 2022-07-29 杭州电子科技大学 一种基于超材料单元的高扫描率的漏波天线
CN115441195B (zh) * 2022-08-17 2024-06-18 中国电子科技集团公司第三十八研究所 一种低剖面圆极化波导天线

Also Published As

Publication number Publication date
WO2024180449A1 (fr) 2024-09-06
CN120814116A (zh) 2025-10-17

Similar Documents

Publication Publication Date Title
US9831557B2 (en) Broadband circularly polarized antenna using metasurface
CN111682309B (zh) 单层单馈背腔圆极化滤波天线
EP2486625B1 (fr) Filtre électromagnétique et dispositif électronique comprenant ledit filtre
US10243279B2 (en) Slot antenna with radiator element
CN112768909B (zh) 具有滤波功能的背腔圆极化贴片天线阵列
US8035568B2 (en) Electromagnetic reactive edge treatment
WO2014080360A2 (fr) Antenne à plaque miniaturisée
US20140118206A1 (en) Antenna and filter structures
JP7090329B2 (ja) アンテナ装置
CN109449585B (zh) 一种紧凑高增益双极化差分滤波天线
CN108777361B (zh) 一种差分双模双极化介质谐振器天线
KR102071819B1 (ko) 메타구조를 이용한 광대역 고이득 안테나
Alhegazi et al. Compact UWB filtering-antenna with controllable WLAN band rejection using defected microstrip structure
JP7644225B2 (ja) アンテナ・デバイス、アンテナ・デバイスのアレイ
CN111864395B (zh) 一种应用于无人机通信的低剖面宽带全向滤波天线
Tang et al. Differentially SIW TE 20-mode Fed substrate integrated filtering dielectric resonator antenna for 5G millimeter wave application
Ghaloua et al. Mutual coupling reduction and miniaturization arrays antennas using new structure of EBG
CN211428337U (zh) 一种车载天线
CN209948042U (zh) 一种基于发卡型谐振器的滤波双工天线
WO2024180449A1 (fr) Antenne de filtrage en métamatériau
WO2024180448A1 (fr) Filtre en métamatériau rempli de diélectrique
Pallavi et al. Design and analysis of patch antenna with T-Shape DGS for aircraft surveillance applications
CN110247175A (zh) 一种基于发卡型谐振器的滤波双工天线
Nayak et al. Design of a novel filtering antenna using open loop resonators along with metallic via
Cui et al. A Metallic 3D Printed Modularized Dual-Stopband AMC-Loaded Waveguide Slot Filtering Antenna.

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20250925

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR