66 results about "Split-ring resonator" patented technology

The invention discloses a double-frequency phase independent regulation and control metasurface unit and an application method. The metasurface unit comprises a dielectric substrate; the two sides of the dielectric substrate are covered with a first metal layer and a second metal layer respectively. Each of the first metal layer and the second metal layer comprises a metal patch main body and a phase regulation and control structure, the center of the metal patch main body is provided with a circular hollow, and the phase regulation and control structure is arranged in the circular hollow; the phase regulation and control structure of the first metal layer and the phase regulation and control structure of the second metal layer are in 180-degree rotational symmetry; the double-connecting-ring structure is an axisymmetric structure; an open circular split ring resonator is arranged in the double-connecting-ring structure, and an electromagnetic isolating ring group is arranged in the open circular split ring resonator; according to the invention, 360-degree independent phase control on electromagnetic waves at a low-frequency band and a high-frequency band is realized.

An ESA antenna includes a layer of filters between the layer of radiating elements and the ground layer. The filter layer obviates certain post processing steps. The filters define a passband at the operating range of the antenna and a stopband defined to prevent crosstalk or reduce known external interference. Each filter includes alternating cells of a resonator cell formed by two split ring resonators and a resonator cell formed by a complementary split ring resonator and a complementary patch / stub. A particular implementation of the filter defines an operating range around 23 gigahertz with a passband to stopband transition of less than 500 megahertz. Vias may connect the filter layer to a surface component layer with beamforming integrated circuits, bypassing the routing layer.

The invention discloses a band-pass filter based on an artificial surface plasmon polariton structure and a design method thereof, a metal structure of the band-pass filter comprises an polariton structure region, the polariton structure region is provided with a plurality of plasmon polariton grooves, and the plurality of plasmon polariton grooves are arranged at intervals along a first direction; the depth direction of the plasmon polariton grooves is perpendicular to the first direction, the lengths and the widths of the plasmon polariton grooves are the same, and the multiple plasmon polariton grooves are formed in the same side of the polariton structure; the split resonant rings are arranged on the dielectric substrate, and the multiple split resonant rings are arranged close to the metal structure. Due to the fact that the multiple plasmon polariton grooves formed in the polariton structure and arranged at intervals in the first direction can form the artificial surface plasmon polariton structure, the band-pass filter based on the artificial surface plasmon polariton structure has the high inhibition capacity for harmonic waves of the band-pass frequency, and the band-pass filter based on the artificial surface plasmon polariton structure has the good inhibition capacity for the harmonic waves of the band-pass frequency.

The invention relates to an electromagnetic sensor based on a split-ring resonator array and a crack detection method, the sensor comprises a first flexible dielectric substrate, a bonding layer, a second flexible dielectric substrate and a metal grounding layer which are bonded from top to bottom, and the top surface of the first flexible dielectric substrate is provided with a microstrip transmission line; one end of the first flexible dielectric substrate is provided with an SMA interface hole, and the bottom surface of the first flexible dielectric substrate is provided with a split-ring resonator array which is in electromagnetic coupling with the microstrip transmission line. The invention also provides a crack detection method of the sensor. The electromagnetic sensor is adjustable in detection area and uniform in field distribution.

An antenna device comprises a case and an antenna element. The antenna element is arranged in the case and radiates a radio wave with a predetermined frequency which has a plane of polarization in parallel to a predetermined plane. The case is formed with a predetermined opening. The predetermined opening has two main openings and a coupling opening. The two main openings are apart from each other in a first direction perpendicular to the predetermined plane. The coupling opening couples the two main openings together in the first direction. The coupling opening has a size smaller than another size of each of the two main openings in a second direction perpendicular to the first direction. The predetermined opening forms a split ring resonator which resonates at the predetermined frequency and radiates a radio wave corresponding to the radio wave radiated from the antenna element.

The application provides a controllable attenuator based on a complementary open resonant ring structure, which is composed of a cascaded active gain compensation amplifier and an open resonant low-pass filter. The open resonant low-pass filter comprises a microstrip low-pass filter, a complementary open resonant ring, a variable capacitor and a control circuit. The microstrip low-pass filter is composed of a middle dielectric layer and a first metal surface and a second metal surface located on both sides of the dielectric layer. The complementary open resonant ring is designed on the second metal surface. The variable capacitor is connected in parallel between the inner metal surface and the outer metal surface of the complementary open resonant ring. The capacitance of the variable capacitor is adjusted through the control circuit, so as to control the attenuation amplitude of the controllable attenuator based on the complementary open resonant ring structure. The controllable attenuator based on the complementary open resonant ring structure has a very small volume and can be integrated into a chip.

The invention provides a passive broadband non-reciprocal electromagnetic wave absorber and a manufacturing method, and the passive broadband non-reciprocal electromagnetic wave absorber comprises three layers of structures from bottom to top: a bottom layer metal reflection backboard, a ferrite substrate and a metal complementary split ring resonator (CSRR) array. Wherein the bottom metal reflection back plate, the ferrite substrate and the CSRR array are square plate-shaped structures with the same shape, and the ferrite substrate is arranged between the bottom metal reflection back plate and the CSRR array; the ferrite substrate is made of La-doped BaFe12O9, and has an asymmetric magnetic conductivity tensor characteristic; the surface layer of the CSRR array is provided with a metal complementary opening; and the CSRR array is coupled with the non-reciprocal characteristic of the ferrite substrate to form differential absorption of left-hand circularly polarized waves and right-hand circularly polarized waves.

This invention relates to a high-focusing-efficiency planar metal metasurface lens, belonging to the field of microwave lenses. It comprises a dielectric layer, a metal layer, and an aperture ring. Two metal layers cover the two end faces of the dielectric layer. Several aperture rings are spaced apart on the metal layers. The aperture rings are two sets of concentric segmented circular rings with symmetrical double openings, distributed internally and externally. The opening portion of the inner ring is deflected by an angle greater than 0° along the center, causing the segmented circular rings within the aperture ring to be asymmetrically distributed, thereby achieving a focusing efficiency greater than 60% and a magnification of 16 times. This invention has the advantages of achieving high focusing efficiency and high magnification by employing an ultra-thin double-layer metal twisted double-aperture resonant ring metasurface unit and a single dielectric interlayer structure.

The application discloses a manufacturing method of a graphene back gate electrode terahertz wave modulator, which comprises the following steps: growing and transferring a first layer of graphene; photoetching a graphene back gate pattern; photoetching a back gate electrode pattern and preparing a back gate electrode; growing a medium layer; growing and transferring a second layer of graphene; photoetching a graphene strip pattern and preparing a graphene strip; photoetching an open resonant ring pattern and preparing an open resonant ring metal. The application discloses a terahertz wave modulator, which comprises a high-resistance substrate, a graphene back gate electrode layer and a high-K gate medium layer which are sequentially bonded from bottom to top; the high-K gate medium layer is provided with an array of graphene strips and an open resonant ring metal, the open resonant ring metal is arranged around the graphene strips and is in physical contact with the graphene strips. The application constructs a back gate electrode on a single layer of graphene, thereby getting rid of the absorption of a conductive substrate to terahertz waves and effectively improving the modulation efficiency of the terahertz wave modulator to terahertz waves.

The application discloses a kind of microwave metamaterial high-temperature sensors based on planar waveguide and preparation method thereof, it is related to sensor technical field.The sensor includes: by top to bottom sequentially arranged top metal layer, dielectric substrate and bottom metal layer;Top metal layer integrates single square complementary split ring resonator structure and periodic arrangement of annular complementary split ring resonator structure;Square complementary split ring resonator structure is located at the center position of top metal layer;Annular complementary split ring resonator structure is located at the two sides of top metal layer, and the opening direction in two sides annular complementary split ring resonator structure is opposite.Wherein, dielectric substrate, top metal layer, bottom metal layer and annular complementary split ring resonator structure form planar waveguide, square complementary split ring resonator structure forms resonant loop and carries out wireless signal transmission, the present application can realize wireless passive, real-time in situ, high-quality factor of harsh environment superhigh temperature monitoring.

This invention discloses a structure and method for achieving wide-bandwidth beam characteristics based on an open-circuit resonator, solving the problems of wide-bandwidth angular domain, compact structure, and low cost compatibility in radar detection. The parasitic structure proposed in this invention is an open-circuit resonator array, composed of stacked subarrays of different frequency bands that are interconnected and cover the antenna's frequency band. The method includes designing the parasitic structure; stacking and assembling the arrays according to the number and frequency bands of the antenna stator arrays; combining the parasitic structure with the antenna; and achieving wide-bandwidth beam characteristics. This invention utilizes the omnidirectional radiation characteristics of the open-circuit resonator to form an array, extending the antenna's beamwidth over a wide range. The open-circuit resonator unit is relatively small, and this invention achieves beam extension functionality within a compact space, exhibiting miniaturization characteristics, and can be applied to small computers and UAVs. This invention prints the open-circuit resonator on the surface of a dielectric substrate, allowing for integrated design with the antenna, significantly reducing design, manufacturing, and installation costs.

The invention relates to the field of metamaterial antennas, and provides a directional radiation antenna structure with adjustable power, which aims at solving the problem that the existing beam control or directional diagram reconstruction method generally depends on a mechanical system, a phased array or a reconfigurable metasurface and lacks the capability of dynamically and continuously adjusting the radiation power of a directional antenna on the premise of not changing the beam shape. One end of the metal waveguide A fixes the SMA connector, and the other end is connected with the metal waveguide B; the metal waveguide B is of a cavity structure, an electric regulation and control structure is arranged in an inner cavity of the metal waveguide B. A plurality of openings distributed at equal intervals are formed in the outer side of the emergent face of the metal waveguide C. The resonance characteristic of the electric opening resonance ring is changed by changing capacitance of the variable capacitance diode. The metamaterial antenna with the near-zero dielectric constant can keep high directionality and a stable radiation pattern, and the radiation power of the metamaterial antenna with the near-zero dielectric constant can be remarkably enhanced.

The application discloses application of an active double-mode microwave micro-flow sensor to liquid dielectric constant detection. The double-mode resonant unit is formed by a microstrip line and a split ring resonator, and has high and low resonant frequency points. The low-frequency resonant frequency point moves to a low frequency with the increase of the dielectric constant, and the high-frequency frequency point moves to a high frequency with the increase of the dielectric constant, thereby effectively increasing the sensitivity of the passive resonant unit. A negative impedance circuit is embedded at the rear end of the microwave passive sensor to form an oscillator, namely a microwave passive resonator and a radio frequency amplifier, and the oscillation frequency changes with the change of the dielectric constant of the material to be detected, and the change of the dielectric constant is mapped to the change of the oscillation frequency. The relationship between the dielectric constant and the resonant frequency is converted to the relationship between the dielectric constant and the direct current voltage through a demodulation circuit. The application has the advantages of high sensitivity, low price, convenience for carrying, etc., and is a high-performance and low-cost system-level detection device which will play an important role in the detection field of liquid materials.

The invention discloses a total-space holographic imaging method based on Janus metasurface amplitude-phase independent control, a basic unit of a metasurface is formed by alternately stacking three metal layers and two dielectric substrates, and transmission-reflection independent regulation and control and direction selective response of dual-frequency (9.5 GHz and 16GHz) and dual-polarization incident electromagnetic waves are achieved. According to the invention, by adjusting the rotation angle and the field angle of the slit of the split-ring resonator in the transmission structure and the rotation angle and the field angle of the I-shaped slit in the reflection structure, the full-range independent regulation and control of the amplitude (0-1) and the phase (0-2pi) of the transmission channel and the reflection channel can be respectively realized; four preset high-quality holographic images can be generated under different incident directions, frequencies and polarization conditions. The metasurface has the advantages of being compact in structure, high in function integration degree and rich in encryption dimension, and can be applied to the fields of information encryption, high-quality imaging, data storage and the like.

The invention discloses a microstrip band-stop filter with a wide upper passband, and relates to the technical field of radio frequency passive devices, and the microstrip band-stop filter comprises an electromagnetic shielding cavity, a dielectric substrate, a microstrip circuit located on the front surface of the dielectric substrate, and a grounding metal layer located on the back surface of the dielectric substrate. The microstrip circuit is composed of an input feeder line, an output feeder line and a four-stage cascade filter network located between the input feeder line and the output feeder line. The stopband center frequencies of the four filtering units are distributed in a staggered manner so as to broaden the stopband bandwidth; each filtering unit is composed of two U-shaped micro-strips and an interdigital capacitor, and symmetrical rectangular split ring resonators loaded with the interdigital capacitors and double-path arc-shaped parallel micro-strip lines are adopted at the interstage connecting positions of the filtering units respectively. According to the invention, the low insertion loss, high selectivity and miniaturization design of the filter are realized, and the technical problem that the existing band elimination filter is difficult to adapt to a complex and changeable signal environment due to the limited passband width is solved.

The invention discloses a resonant ring multilayer medium probe and method for detecting defects of a metal outer surface wave-absorbing material, and belongs to the technical field of microwave detection. In order to solve the problem that there is no resonant multilayer dielectric structure probe capable of detecting the defects of a non-metal wave-absorbing material on the surface of a metal layer at present, the probe is of a multilayer plane printing structure and comprises a feeder line, a lower dielectric substrate, a grounding plate, an upper dielectric substrate and a radiation metal patch from bottom to top, the radiation metal patch, the grounding plate and the feeder line are metal layers, the center of the grounding plate is provided with a rectangular gap, the lower side of the lower dielectric plate is printed with a microstrip line for feeding, the radiation metal patch is composed of a plurality of rectangular resonant rings which are symmetrically arranged according to a matrix structure, each rectangular resonant ring is composed of an outer ring and an inner ring, and a gap is arranged between the outer ring and the inner ring. The outer ring and the inner ring are both provided with openings, and the resonant ring is printed on the upper dielectric substrate. During detection, damage detection of the wave-absorbing coating on the outer surface of the metal is realized by using an S11 curve corresponding to the probe.

The application discloses a kind of metal organic framework UiO-66 modified terahertz super surface detection lung cancer marker 2-pentanone method.The method is based on a kind of terahertz multi-resonance super surface sensor, and its unit structure is composed of two S-shaped open resonant ring and an antenna, produces three independent resonant valleys.To improve detection selectivity and structural stability, the application is functionalized to super surface using three-layer modification strategy: APTES is introduced in sequence to form stable interface layer, spin-coated amino-rich PEI layer is provided with additional adsorption sites to interact with ketone molecules, and finally spin-coated metal organic framework UiO-66 is used as sensing layer to realize effective pre-enrichment of 2-pentanone.During detection, three resonant valleys show linear red shift with the increase of 2-pentanone concentration, and the lowest test concentration is 20 ppm.The application uses multi-resonance characteristics combined with multi-dimensional response mode to realize rapid, high-sensitivity and high-selectivity non-contact detection of lung cancer marker 2-pentanone.

An electrically tunable filter (10), comprising a first dielectric substrate (11), a signal transmission line (12), a resonant structure (13), and a first ground structure (14), wherein the resonant structure (13) comprises a split-ring resonator (131) and a variable capacitor (132); the variable capacitor (132) is connected in series on the body of the split-ring resonator (131); the split-ring resonator (131) is located on one side of the signal transmission line (12) in the length direction, and a gap is present between the split-ring resonator (131) and the signal transmission line (12). In the implementation of the present disclosure, by adjusting the capacitance value of the variable capacitor (132), the resonance frequency of the split-ring resonator (131) can be adjusted, that is, the stop-band resonance frequency of the electrically tunable filter (10) can be adjusted, so that the electrically tunable filter (10) can filter a plurality of frequency bands, thereby simplifying a filter circuit for multi-frequency band filtering, and thus achieving miniaturization, integration and low energy consumption of the filter circuit.

The utility model relates to the radio antenna technology, and discloses a directional antenna for Internet of Things communication and an Internet of Things communication device, the directional antenna comprises an artificial magnetic conductor reflecting surface located at the upper layer and a gradient metamaterial layer located at the lower layer, and the artificial magnetic conductor reflecting surface comprises metamaterial units arranged in a 5 * 5 array; in each metamaterial unit, the upper layer is a metamaterial patch covering the 2.4 GHz frequency band, the lower layer is a slot coupling antenna covering the Sub-1GHz frequency band, and the central axis of the central aperture of the fractal split resonant ring on the upper layer coincides with the central axis of the central aperture of the nested hexagonal ring on the lower layer. The utility model aims to provide a directional antenna which is low in power consumption and strong in interference resistance and can be used for long-distance and high-penetration communication of the Internet of Things.

The invention discloses a filtering power divider and a signal processing method. The filtering power divider comprises an input end used for inputting a first signal; the two output ends are used for outputting two paths of second signals; the filtering power division structure comprises two dual-band filtering structures and a power division structure, each dual-band filtering structure comprises a half-mode substrate integrated waveguide filter loaded with a first complementary split ring resonator (CSRR) structure, and the first CSRR structure is obtained by cascading two CSRR structures. And the filtering power division structure is used for performing dual-band filtering and power division on the first signal input from the input end to obtain the two paths of second signals, and outputting the two paths of second signals through the two output ends.

The invention discloses a multiband tunable electromagnetic induction-like transparent metamaterial and application, and belongs to the technical field of electromagnetic induction transparent metamaterials. The multiband tunable electromagnetic induction-like transparent metamaterial comprises a plurality of periodically arranged structural units, each structural unit comprises a substrate, a graphene metasurface is arranged on the upper surface of each substrate, and each graphene metasurface comprises a rectangular resonator, a first split-ring resonator and a second split-ring resonator. The second split-ring resonator is located between the first split-ring resonator and the rectangular resonator, and the bottom of the second split-ring resonator is nested in the first split-ring resonator; the rectangular resonator, the first opening resonance ring and the second opening resonance ring generate three similar electromagnetic induction transparent windows in the terahertz wave band through the near-field coupling effect. According to the multiband tunable electromagnetic induction-like transparent metamaterial and the application, three high-transmittance transparent windows are generated in a terahertz wave band, a remarkable slow light effect is achieved, and the transmission amplitude, the center frequency and the slow light effect of the transparent windows are adjusted by adjusting the Fermi level of graphene.

The application provides a low-profile duplex filter antenna and belongs to the technical field of wireless energy transmission.The low-profile duplex filter antenna comprises an upper metal floor, a dielectric substrate, a lower metal floor, a cavity column, a perturbation via and a suppression via; the lower metal floor is arranged on the lower surface of the lower dielectric substrate; the upper metal floor is arranged on the upper surface of the dielectric substrate; the cavity column penetrates through the upper metal floor, the dielectric substrate and the lower metal floor and surrounds a substrate integrated waveguide cavity; the perturbation via and the suppression via penetrate through the upper metal floor, the dielectric substrate and the lower metal floor; a cross-shaped groove is etched in the center of the upper metal floor; two complementary split ring resonator grooves with different diameters are etched at the connection between the circular cavity and the two side rectangular cavities of the upper metal floor; two feed lines are led out from the two ends of the upper metal floor. The antenna has the characteristics of low profile, is easy to integrate, and simultaneously reduces the manufacturing cost of the antenna and facilitates processing and manufacturing.

The duplexer comprises an input structure, a first output structure, a second output structure, a first transmission structure and a second transmission structure, the first transmission structure is electrically connected between the input structure and the first output structure, the first transmission structure comprises a first artificial surface plasmon transmission line and a first split resonant ring, and the second transmission structure comprises a second artificial surface plasmon transmission line and a second split resonant ring. The first split-ring resonator is loaded on the first artificial surface plasmon transmission line to form a first band elimination filter together with the first artificial surface plasmon transmission line; the second transmission structure is electrically connected between the input structure and the second output structure, the second transmission structure comprises a second artificial surface plasmon transmission line and a second opening resonance ring, and the second opening resonance ring is loaded on the second artificial surface plasmon transmission line to jointly form a second band elimination filter. According to the technical scheme, the duplexer provided by the invention can effectively reduce the influence of crosstalk between the transmission lines, improve the signal transmission quality and reduce the loss.

The application provides an arbitrary active phase control electromagnetic super surface, comprising a substrate, an active phase control layer and a passive phase control layer sequentially arranged on the substrate, a microstructure unit of the active phase control layer is a circular opening resonant ring structure composed of an active control material, a microstructure unit of the passive phase control layer is a circular opening resonant ring structure composed of a good conductor material and having the same center as the microstructure unit of the active phase control layer, an outer diameter of a resonant ring of the passive phase control layer is different from that of the active phase control layer, an inner diameter of the resonant ring of the passive phase control layer is different from that of the active phase control layer, and a resonant ring opening area of the passive phase control layer has no overlapping part with that of the active phase control layer. The arbitrary active phase control super surface provided by the application can realize an additional phase of any requirement through the control of geometric corners of the opening resonant rings of the passive phase control layer and the active phase control layer.

Embodiments of charged particle beam systems, components, and methods for extracting charged particles from a gas are described. In a first aspect, a charged particle source includes a resonator. The resonator may include a dielectric substrate defining a first side and a second side, the second side opposite the first side. The resonator may include a first conductive layer disposed on the first side. The first conductive layer may be disposed according to a pattern including a loop portion. The pattern may define a gap in the loop portion of the first conductive layer. The resonator may also include a second conductive layer disposed on the second side. The charged particle source may also include a source electrode. A source electrode may be disposed adjacent the first side. The source electrode may be offset from the dielectric substrate.

The invention discloses a miniaturized three-frequency antenna for a home service robot. The antenna comprises a dielectric substrate, and a metal ground plane, a coplanar waveguide feeder line and a metal radiation unit which are arranged on the same surface of the dielectric substrate, wherein the edge, close to the metal radiation unit, of the metal ground plane is of a stepped structure. The metal radiation unit is integrally formed by a butterfly radiation structure and a split-ring resonator structure through a connection structure. The butterfly-shaped radiation structure is used for exciting broadband 2.4 GHz low-frequency resonance, and the split-ring resonator structure excites 3.5 GHz and 5.8 GHz high-frequency resonance through coupled feed. The unique gap between the stepped ground plane and the butterfly radiation structure synergistically realizes good impedance matching of three frequency bands. The antenna is compact in structure and has broadband performance in the 2.4 GHz frequency band, the radiation pattern of each frequency band has good omni-directivity, and the multi-frequency-band wireless communication requirement of a home robot in a complex indoor environment is met.

The application discloses a high-efficiency broadband radio frequency power amplifier based on an open resonant ring and a design method thereof, and at least comprises a broadband input matching network, a transistor circuit and an output matching network, wherein the output matching network is provided with at least an open resonant ring second harmonic matching network and a broadband fundamental wave matching network, and the open resonant ring second harmonic matching network is composed of a two-port rectangular double-loop open resonant ring. By using the low-resistance characteristic of the open resonant ring in the stop band, the application can match the second harmonic at the output end, and the second harmonic matching and the fundamental wave matching are carried out separately, so that the second harmonic and the fundamental wave can be well matched to the optimal output impedance at the same time, thereby improving the drain efficiency and the working bandwidth.

This invention relates to the field of terahertz metasurface technology, specifically to a strong-field terahertz-controlled terahertz wavefront-tunable metasurface, comprising: a semiconductor substrate, multiple arrays of first metal-aperture resonators and multiple arrays of second metal-aperture resonators; the multiple arrays of first metal-aperture resonators and multiple arrays of second metal-aperture resonators are arranged on the semiconductor substrate without overlapping; each metal-aperture resonator has a nanometer-sized opening; the azimuth angles of the metal-aperture resonators in the first metal-aperture resonator arrays and the metal-aperture resonators in the second metal-aperture resonator arrays differ by 90 degrees; this invention enables targeted wavefront tuning based on the field strength of the incident terahertz wave.

This invention belongs to the field of biomedical detection equipment and sensor technology, and proposes a dual-frequency CSRR sensor with both high resonance depth detection sensitivity and high resonance frequency detection sensitivity, along with a non-invasive blood glucose detection method. The dual-frequency CSRR blood glucose detection sensor and its non-invasive blood glucose detection method include an open-circuit / combiner microstrip line, a substrate, and complementary open-loop resonator units, wherein: the open-circuit / combiner microstrip line is etched on a copper layer on the top of the substrate; two double-ring circular dual-frequency complementary open-loop resonator CSRR units and two single-ring circular dual-frequency complementary open-loop resonator CSRR units are etched on a copper layer on the bottom of the substrate; the symmetry line of the four CSRR units is perpendicular to the axis of the open-circuit / combiner microstrip line; blood glucose is tested using the above sensor. It is mainly applied in the design and manufacturing of blood glucose monitoring devices.

The invention provides a dual-polarized electromagnetic transparent oscillator and a base station antenna. The dual-polarized electromagnetic transparent oscillator comprises at least one radiation group which is arranged on a dielectric plate, each radiation group comprises two radiation oscillator arms which are symmetrical relative to the center of the dielectric plate, and each radiation oscillator arm is of an annular structure; and the split resonant ring structures are connected to the radiation oscillator arms, and the split resonant ring structures are configured in a manner that the direction of induction current is opposite to that of induction current on the radiation oscillator arms. The distribution direction of the induction current in the split-ring resonator structure is opposite to the distribution direction of the induction current on the radiation oscillator arm, the scattered field generated by the induction current in the far field is self-counteracted, the radar cross section of the low-frequency antenna in the high frequency band is reduced, and the scattering interference of the low-frequency antenna on the high-frequency antenna is reduced.