130 results about "Antenna bandwidth" patented technology

The present invention relates to the field of high-rate mobile wireless communications. Disclosed are a multi-frequency multi-polarized wide-beam scanning base station system, and an optimization design method. The method comprises: on the basis of an aperture field expansion theory and a mode coupling theory, designing a conical horn feed source antenna capable of radiating a Gaussian fundamental mode beam, and providing a stable beam width and a stable phase center; designing a beam separation device based on a periodic structure, wherein the beam separation device includes band-pass frequency selective surfaces and a linear polarization grid; and combining front-end quasi-optical links of multiple frequency channels and multiple polarized channels, so as to increase the bandwidth and communication rate of a base station antenna. In the present invention, a genetic optimization algorithm is combined with reflector shaping, thereby effectively reducing the conflict between a shielding effect of a dual-reflector antenna and a scanning angle, and realizing the multiplication of a beam scanning angle.

The invention discloses a broadband omnidirectional conformal long-slot antenna and a wireless communication device, the antenna comprises two antenna units which are arranged up and down, and the two antenna units relatively rotate around the center at an angle of 45 degrees. Each antenna unit comprises an annular metal resonant cavity, a first annular dielectric substrate, a metal ring, a second annular dielectric substrate and a microstrip metal feeder which are sequentially arranged from inside to outside, and a circle of annular long seam is formed in the center of the metal ring. According to the antenna, the slot is used for providing low-frequency resonance points, the microstrip open-circuit line is used for providing high-frequency resonance points, the antenna achieves double working frequency bands, the working bandwidth of the antenna is greatly expanded through the design, the problem that the bandwidth of the antenna is insufficient is solved, the antenna is designed in a circular ring shape, a double-layer directional diagram compensation design method is applied, and the antenna performance is improved. Therefore, the antenna can achieve the omnidirectional radiation performance, and the problem that a traditional cavity-backed slot antenna is difficult to radiate in an omnidirectional manner is solved.

Techniques for dynamic polarization selection by antenna bandwidth are disclosed herein. An example device includes a first antenna configured to transmit signals within a first bandwidth range, a second antenna configured to transmit signals within a second bandwidth range that is different from the first bandwidth range, one or more processors, and one or more memories communicatively coupled to the first antenna, the second antenna, and the one or more processors. The memories store instructions that, when executed by the one or more processors, cause the device to: transmit, by the first antenna, a first signal at a first frequency included within the first bandwidth range, determine that a second signal is to be transmitted at a second frequency that is different than the first frequency, determine that the second frequency is included within the second bandwidth range, and transmit the second signal using the second antenna.

The invention discloses a double-frequency circularly polarized antenna element, which belongs to the technical field of antennas and comprises a high-frequency-band radiation unit and a low-frequency-band radiation unit. The high-frequency band radiation unit comprises a first dielectric substrate and a first feed probe. A first radiation patch is embedded in one end face of the first dielectric substrate, and the first radiation patch is provided with two symmetrical chamfers. The top end of the first feed probe passes through the first through hole and is fixedly connected with the first radiation patch. The low-frequency-band radiation unit comprises a second dielectric substrate, a second radiation patch and a third dielectric substrate. The second radiation patch is arranged on the second dielectric substrate. The second dielectric substrate is provided with a second metalized through hole. The third dielectric substrate is provided with a Chebyshev Balun feed printed line. The antenna element provided by the invention not only can realize the circular polarization of the antenna, but also can reduce the coupling between antennas of different working frequency bands while expanding the bandwidth of the antenna, improve the isolation between two working frequency band ports, and reduce the cross polarization.

The invention provides a sub-wavelength structure unit and a preparation method thereof, a reflective array and a broadband planar film antenna, and the sub-wavelength structure unit comprises a sub-wavelength structure, a metal reflective layer, a first film and a second film. The sub-wavelength structure comprises at least two types of single resonant structures; the at least two types of single resonance structures are arranged on the first thin film; the metal reflecting layer is arranged on the second thin film; a spacing layer is arranged between the first film and the second film; and the phase and dispersion characteristics of the sub-wavelength structure unit in the first resonance area and / or the second resonance area are determined by setting parameters of the single resonance structure. According to the invention, the sub-wavelength structure comprises multiple types of single-resonant structures for forming different multi-resonant sub-wavelength structures, so that the problem of narrow bandwidth of a single-layer film antenna formed by the sub-wavelength structure unit can be solved.

The invention relates to the technical field of dual-polarized antenna manufacturing, in particular to an easy-to-feed broadband dual-polarized reconfigurable transmission antenna array, which is provided with a feed source antenna, a direct current bias network and more than two dual-polarized reconfigurable units, wherein each dual-polarization reconfigurable transmission antenna unit is formed by orthogonally arranging two identical reconfigurable transmission units on the same plane, and each reconfigurable transmission unit is internally provided with two linearly polarized dipoles which are arranged along the same direction; the two dipoles form a receiving and transmitting structure of an active receiving dipole and a passive asymmetric transmitting dipole, the two dipoles are separated through a common grounding point and connected through a metalized through hole, and a dipole is connected beside each dipole unit in parallel to serve as a passive parasitic bypass so as to expand the bandwidth of the antenna. The receiving dipole is integrated with two pin diodes.

The invention discloses a Terahertz broadband high-gain Vivaldi antenna based on a CPW (Coherent Plane Waveguide) rotary slot line structure, and belongs to the field of Terahertz communication. The antenna adopts an integrated single-layer metal structure on the top layer of a dielectric substrate, and is divided into a radiation arm and a CPW rotating slot line balun along the axial direction. The inner side edge of the radiation arm is a smooth exponential change curve, and the middle exponential gradual change groove forms a broadband traveling wave radiation channel. Periodic grid choke grooves are loaded on the outer side edge so as to suppress edge surface waves and improve a directional diagram. The feed part adopts a CPW to slot line balun structure to realize conversion from an unbalanced mode to a balanced mode, and a fan-shaped radial branch knot is utilized to form a broadband virtual short circuit boundary at a feed point to ensure unidirectional efficient transmission of energy. In addition, a group of string-shaped director patches are arranged in the opening area of the exponential gradual change groove along the central axis, and the wave beam is guided through phase correction. The terahertz planar antenna effectively solves the problems of limited bandwidth and insufficient gain of the terahertz planar antenna, and has the characteristics of compact structure, easiness in integration, excellent radiation performance and the like.

The invention relates to the technical field of wireless communication, and discloses a liquid crystal antenna and communication equipment, and the liquid crystal antenna comprises a liquid crystal box and a metal waveguide; the liquid crystal box at least comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is located between the first substrate and the second substrate. The metal waveguide is located on the side, away from the second substrate, of the first substrate. The liquid crystal box further comprises a first metal layer which is located on the side, away from the metal waveguide, of the first substrate. The first metal layer is grounded, and the first metal layer comprises two hollow grooves; the length direction of the metal waveguide is the same as that of the hollow groove; in the direction perpendicular to the plane where the first substrate is located, the metal waveguide and the two hollowed-out grooves are at least partially overlapped. The communication equipment comprises the liquid crystal antenna. According to the invention, insertion loss can be effectively reduced, antenna bandwidth is improved, and antenna gain is ensured.

The invention discloses a low profile broadband antenna for a 5G-WiFi frequency band. Comprising a dielectric substrate and a metal radiation layer arranged on the upper surface of the dielectric substrate; the metal radiation layer comprises a rectangular patch and two identical U-shaped patches, and the two identical U-shaped metal patches are close to the radiation edge and the non-radiation edge of the rectangular patch at the same time and surround the rectangular patch. Wherein two longitudinal metal slots and one transverse rectangular slot are loaded on the rectangular patch to enhance the bandwidth of the antenna. According to the antenna provided by the invention, the antenna can be ensured to have a relatively low antenna profile, and meanwhile, the antenna has enough bandwidth to cover a WLAN (Wireless Local Area Network) 5.2 GHz (5.15 to 5.36 GHz), a WLAN 5.8 GHz (5.725 to 5.825 GHz) and a WiMAX (Worldwide Interoperability for Microwave Access) 5.5 (5.25 to 5.825 GHz).

This application provides an antenna, antenna array, and communication device, aiming to construct more degrees of freedom and antenna ports within a limited antenna panel size. The antenna includes: four independent feed points; and four helical arms corresponding one-to-one with the four feed points, each helical arm connected to its corresponding feed point. The helical end of each helical arm can be connected to its corresponding feed point using an open-circuit stub structure, and / or, the end of each helical arm can be coupled to a parasitic patch, and / or, the spacing w between two adjacent helical arms satisfies: w ≤ λ / 10, where λ is the operating wavelength. This design provides four degrees of freedom and widens the antenna bandwidth. Within the limited antenna panel size, this is beneficial for improving system throughput.

The invention discloses an ultra-large octave antenna based on an organic photoconductive material, and belongs to the field of metamaterials and antennas. Comprising an organic photoconductor film electromagnetic surface and a digital light processing module capable of projecting different patterns on the surface of the organic photoconductor film electromagnetic surface, the organic photoconductor film electromagnetic surface can change conductivity distribution through light control, and the digital light processing module can dynamically adjust the size and shape of the patterns projected on the organic photoconductor film electromagnetic surface. Therefore, a reconfigurable antenna array is generated, and cross-multi-octave ultra-wideband electromagnetic wave signal receiving and transmitting are realized. The electromagnetic surface of the organic photoconductor film sequentially comprises a photoconductive material layer, a first light-transmitting glass layer, an indium tin oxide microstrip line feed layer, a second light-transmitting glass layer and a substrate indium tin oxide layer according to a lamination sequence. According to the invention, the problems of narrow bandwidth, slow response and high cost of a traditional reconfigurable antenna are solved.

The invention relates to an antenna assembly and a vehicle. The antenna assembly comprises a dielectric body, a first antenna structure, a second antenna structure and a metal frame body. The projections of the plurality of second antenna structures on the dielectric body along the thickness direction of the dielectric body are arranged around the circumferential direction of the first antenna structure, the plurality of second antenna structures are rotationally symmetrical about the center of the first antenna structure, and each second antenna structure is coupled with the first antenna structure. The metal frame body is arranged around the periphery of the first antenna structure, and the metal frame body is connected with the dielectric body. The low-profile antenna structure is realized, the influence caused by the surface wave effect of the dielectric body is improved, the mutual coupling interference between double frequencies is reduced, and the antenna gain and the antenna bandwidth are improved. Besides, the metal frame body can restrain back lobe level energy, capacitance coupling is formed between the first antenna structure and the metal frame body, capacitance coupling is formed between the second antenna structure and the metal frame body, the antenna miniaturization design is further achieved, the overall size is reduced, and the installation space can be prevented from being limited.

The invention discloses an antenna housing framework for a broadband phased-array antenna, and belongs to the technical field of phased-array antennas. Which comprises a phased-array antenna body on which an antenna housing is arranged, and is characterized in that the antenna housing comprises an antenna housing upper layer, an antenna housing interlayer and an antenna housing lower layer; at least one of two sides of each layer in the three-layer structure of the antenna housing is provided with a radiation patch which is integrated with the antenna housing; the patch size of the radiation patch arranged on the antenna radiation surface of the phased-array antenna body and the patch size of the radiation patch arranged in the three-layer structure of the radome are sequentially reduced from bottom to top. According to the invention, the radiation patch is directly integrated on the antenna housing, so that the radiation patch becomes an organic component of a phased-array antenna radiation system; the radome is changed from a pure protection part to a key part with an active antenna bandwidth expansion function; the working bandwidth of the phased-array antenna can be effectively expanded on the premise that the complexity and the manufacturing cost of the phased-array antenna body are not greatly increased.

The invention relates to the technical field of antennas, in particular to a bandwidth-enhanced circularly-polarized reconfigurable microstrip antenna. Comprising a dielectric substrate and a metal floor attached to the lower surface of the dielectric substrate, and an annular patch, a driving branch knot, two parasitic branch knots and a direct current bias line are attached to the upper surface of the dielectric substrate. An inner conductor and an outer conductor of the coaxial cable are connected with the driving branch knot and the metal floor respectively, the driving branch knot excites a TM11 mode of the circular ring through an electric coupling path and excites a resonant mode of the parasitic branch knot through another magnetic coupling path, and the resonant parasitic branch knot excites another TM11 mode of the circular ring through electric coupling. And the circular polarization bandwidth with two axial ratio zero points is enhanced. The bias network controls the on-off of the diode on the parasitic branch knot through the DC voltage loaded by the coaxial cable so as to realize circular polarization reconfiguration. The antenna has the advantages of being compact in structure, enhanced in bandwidth, reconfigurable in circular polarization and low in profile, and compared with a circular polarization reconfigurable antenna of the same size, the bandwidth is expanded by more than one time, and the application range is wide.

According to the terminal antenna bandwidth and isolation cooperative enhancement method, an antenna is arranged on the edge of a dielectric substrate, one face of a metal patch is attached to the inner side of a rear cover of terminal equipment, the other face of the metal patch is opposite to one face of the dielectric substrate (middle frame), and the metal patch is composed of a plurality of sub metal patches. On one hand, the sub-metal patches are effectively excited by the antenna to realize bandwidth expansion, and on the other hand, the sub-metal patches counteract an original coupling path to realize isolation enhancement. The metal patches are arranged on the periphery of the antenna, and the size and the position of the metal patches are optimized, so that the antenna can realize wide bandwidth and high isolation under the condition of extremely small clearance and distance. The method can be widely applied to the fields of mobile communication terminal equipment, Internet of Things terminal equipment and the like.

The application discloses a low-profile wideband antenna for a 5G-WiFi frequency band. The low-profile wideband antenna comprises a dielectric substrate and a metal radiation layer arranged on the upper surface of the dielectric substrate. The metal radiation layer comprises a rectangular patch and two identical U-shaped patches, and the two identical U-shaped metal patches are arranged close to the radiation edge and the non-radiation edge of the rectangular patch at the same time, so as to surround the rectangular patch. Two longitudinal metal slots are loaded on the rectangular patch, and a horizontal line rectangular slot is arranged to enhance the bandwidth of the antenna. The low-profile wideband antenna can ensure that the antenna has a low antenna profile and has sufficient bandwidth to cover WLAN 5.2GHz (5.15-5.36GHz), WLAN 5.8GHz (5.725-5.825GHz) and WiMAX 5.5 (5.25-5.825GHz).

The application discloses a binary antenna with ultra-wideband and high isolation and a design method thereof, and mainly solves the problem that the bandwidth of the existing traditional antenna is too narrow to adapt to the demand of a wideband communication system. The application comprises a dielectric substrate, a metal floor and two symmetrical cone monopole antennas and a symmetrically designed antenna decoupling matching network (DMN), wherein the DMN is formed by bending eleven groups of transmission lines with fixed length and width, the first seven groups are used for decoupling of the antenna, and the last four groups are used for matching adjustment. Through the DMN, high port isolation (> 20 dB) between the two cone monopole antennas is realized. The DMN designed in the application has high design freedom, and compared with other decoupling technologies, a wider decoupling bandwidth is realized.

The invention discloses a millimeter wave antenna and a millimeter wave radar, and relates to the technical field of in-vehicle monitoring, and the millimeter wave antenna comprises a grounding layer, a base layer and a radiation structure. The grounding layer is used for being laid or embedded in the ground. The base layer is stacked above the grounding layer, in the vertical direction, the middle position of the base layer is partially hollowed out to form a hollowed-out position, and the hollowed-out position is used for containing the grounding part; the radiation structure is arranged right above the base layer, the radiation structure comprises a feed layer, a plurality of feeder lines and a plurality of antennas, the feed layer is arranged above the base layer and is located right above the hollow position, each feeder line is at least partially embedded into the feed layer, the plurality of antennas are correspondingly and electrically connected with the plurality of feeder lines, and each antenna and the hollow position are arranged in a staggered manner in the horizontal direction; wherein the feed layer is provided with a plurality of via holes around each feed line, and each via hole penetrates through the feed layer and a part of the base layer and is used for being electrically connected with the grounding part; according to the technical scheme provided by the invention, the antenna has larger antenna bandwidth while facilitating layout.

This application discloses a wide-beam cavity antenna element and its phased array antenna. The cavity antenna element includes a first radiating patch, a first dielectric layer, a second radiating patch, an adhesive layer, a second dielectric layer, and a metal ground layer arranged sequentially. The first radiating patch has a first chamfer on each diagonal and a first U-shaped slot in its center. The second radiating patch has a second chamfer on each diagonal and a second U-shaped slot in its center. This application adopts a dual-radiating patch structure, with the first and second radiating patches located in different dielectric layers, effectively expanding the antenna bandwidth and improving radiation efficiency. The double-layer square microstrip patch design is compact and facilitates miniaturization and integration. The first radiating patch incorporates the first chamfer and the first U-shaped slot, while the second radiating patch incorporates the second chamfer and the second U-shaped slot, increasing the current path and transforming the original single resonant point into three resonant points within the frequency band, significantly widening the antenna's impedance bandwidth.

The invention belongs to the technical field of antenna and radio frequency circuit integration, and discloses a cavity antenna circuit integrated metamaterial and a preparation method thereof. By removing part of the dielectric substrate to construct the artificial cavity, space is provided for a radio frequency functional circuit, and efficient coplanar integration of the antenna and the radio frequency circuit is realized. According to the invention, the mutual restriction of the thickness of the dielectric substrate on the antenna bandwidth and radio frequency circuit design can be overcome, the design flexibility and stability are improved, and the application scene is expanded. Through cavity and space stacking integration, the problem that in the prior art, an antenna and a radio frequency circuit are machined on the same layer of substrate at the same time, and consequently the design requirements of the antenna and the radio frequency circuit are contradictory is solved, the artificial cavity is formed in the bottom of the antenna medium, and the radio frequency function circuit executing the electromagnetic function is arranged in the artificial cavity, so that the antenna efficiency is improved. The prepared cavity antenna circuit integrated metamaterial can simultaneously exert the optimal performance of the two parts of an antenna and a radio frequency circuit, and the design flexibility is greatly improved.

The low-profile vehicle-mounted antenna comprises a PCB monopole antenna, the PCB monopole antenna comprises a board body, antenna radiation patterns are arranged on the front face and the back face of the board body respectively, the board body directly feeds through a cable, and a printing grounding structure is arranged on the board body, forms electromagnetic coupling with the cable and is used for expanding the bandwidth of the antenna. According to the low-profile vehicle-mounted antenna, the antenna radiation patterns are arranged on the two sides of the plate body respectively, so that a low-profile flat structure is achieved, and the height of the antenna is reduced. And meanwhile, by reasonably utilizing the coupling effect of the cable and the printed grounding structure on the radiation patch, the bandwidth of the antenna is expanded, and the full-band stable performance is realized. And direct feeding is realized through the cable without an additional and complex feed network, so that the effects of simplifying the structure and reducing the cost are achieved.

The invention provides a broadband horizontal polarization waveguide slot antenna array, which comprises a radiation slot layer, a slot coupling layer, a feed network layer and a standard waveguide interface, and is characterized in that the radiation slot layer is provided with 16 independent ridge waveguides, 16 V-shaped slots are cut on each ridge waveguide, each ridge waveguide is blocked by three cavity isolation walls to form four ridge waveguide sections, and each cavity isolation wall is provided with one V-shaped slot. Four V-shaped slots are distributed on each ridge waveguide section, 64 I-shaped coupling slots are formed in the slot coupling layer, the I-shaped coupling slots are located under the ridge waveguide sections, and the feed network layer adopts a flattened narrow-edge ridge waveguide design. Comprising a five-order one-to-two ridge waveguide power divider, a ridge waveguide-to-common waveguide converter, a multi-branch waveguide impedance transformer and an E-plane T-shaped joint. The antenna has the beneficial effects that the antenna is light in weight and low in profile; the antenna bandwidth is improved; the antenna structure is simple.

The slotted microstrip antenna comprises a dielectric plate, a first microstrip feeder plate, a second coupling window plate and a third slotted microstrip antenna plate, and the dielectric plate comprises an upper dielectric plate and a lower dielectric plate. The first microstrip feeder plate, the lower dielectric plate, the second coupling window plate, the upper dielectric plate and the third slotted microstrip antenna plate are sequentially arranged from top to bottom, the second coupling window plate is a common grounding plate, and the lower dielectric plate and the upper dielectric plate are separated by the common grounding plate. And the first microstrip feeder plate arranged on the lower dielectric plate is electromagnetically coupled to the upper radiation patch through the slot aperture of the common grounding plate. The upper dielectric plate is made of a material with a low dielectric constant and is beneficial to radiation, and the lower dielectric plate contains a feed source and is made of a material with a high dielectric constant, so that a field is restrained in a feeder line, and the bandwidth of the antenna is obviously increased.

The application discloses a miniaturized broadband folded dipole base station antenna and relates to the technical field of base station antennas.The miniaturized broadband folded dipole base station antenna comprises a metal reflecting plate, a dielectric plate, a support column assembly and a feed point, the dielectric plate is fixed on the metal reflecting plate through the support column assembly, the surface of the dielectric plate is printed with a microstrip line assembly in the shape of a whole rectangular ring, and the feed point is arranged on the microstrip line assembly and serves as a simulation port of simulation software.The antenna profile height and cross-sectional area are reduced, and the antenna bandwidth is improved through mode fusion and microstrip line coupling.

The invention discloses a low-profile ultra-wideband patch antenna based on hybrid electromagnetic coupling. The low-profile ultra-wideband patch antenna comprises a dielectric substrate, a metal floor, a feed column, a magnetic coupling parasitic patch, a main feed half-mode patch and an electric coupling parasitic patch, wherein the magnetic coupling parasitic patch, the main feed half-mode patch and the electric coupling parasitic patch are arranged in sequence; the feed column directly feeds power to the main feed half-mode patch, the magnetic coupling parasitic patch is directly connected with the main feed half-mode patch, and a row of short circuit columns connected with the metal floor are arranged at the connection position of the magnetic coupling parasitic patch and the main feed half-mode patch. The magnetic coupling parasitic patch is loaded on the short-circuit edge of the main feed half-mode patch, namely the position with the largest magnetic field, and the electric coupling parasitic patch is loaded on the open-circuit edge of the main feed half-mode patch, namely the position with the largest electric field. And the antenna forms an overall layout in which the three half-mode patches are connected in a mixed coupling form. According to the layout, two parasitic patches of magnetic coupling and electric coupling are introduced into the same structure, so that a patch antenna in a mixed coupling form is realized, and the bandwidth of the antenna is expanded.

A low-loss hexagonal ferrite material in S and C bands and its preparation method, belonging to the technical field of ferrite material preparation. The hexagonal ferrite material includes a main phase and an additive. The main phase is Ba5Cu 2‑x Ni x Ti3Fe 12 O 31 , where x = 0.5 to 1, and the additive is SiO2; the additive accounts for 0.5 to 1.5 wt% of the mass of the main phase; by changing the ratios of Cu 2+ , Ni 2+ , the magnetocrystalline anisotropy, magnetic permeability and natural resonance frequency are regulated, and the real part of the magnetic permeability μ' ≥ 1.8, the magnetic loss tangent tanδ m ≤ 0.08, the real part of the dielectric constant ε' ≥ 10, and the dielectric loss tangent tanδ d ≤ 0.01 are achieved in the S and C bands. It can be used for the miniaturization of Sub-6GHz antennas, improving the antenna bandwidth and reducing the impedance mismatch.

The utility model discloses a dual-frequency antenna with an improved structure. The dual-frequency antenna comprises a circuit board, a second antenna and at least one matching element, the circuit board is provided with a front surface and a back surface. The front surface comprises a first antenna, a first grounding metal layer, a signal feed-in metal layer and a metal extension section. The back surface comprises a second grounding metal layer and a clearance area. By means of the structural design, the frequency is adjusted, the radiation efficiency is increased, the efficiency is improved, the size is reduced, and the size of a clearance area can be greatly reduced through the overall design. A matching element is electrically connected between the first antenna and the second antenna to be used for matching adjustment, and the two frequency bands can be separated from each other so that the antennas can adapt to various types and environment designs. The first antenna uses the polygonal pattern design of the large-area planar metal layer to increase the antenna bandwidth, so that the cost can also be reduced.

The invention provides a moving and standing wave electrode composite loading microwave photon receiving antenna and a signal receiving method thereof.The antenna comprises a dual-band combined plane patch antenna and a lithium niobate film moving and standing wave electro-optical modulation chip, a high-frequency antenna and a moving wave electrode are mutually connected through gold wire bonding, and a low-frequency antenna and a standing wave electrode are mutually connected through gold wire bonding; and a single beam of light wave is modulated by the two electrodes in sequence by using a cascade light path. The signal receiving method comprises the steps of light wave injection, dual-band signal induction and loading, sequential modulation based on the lithium niobate electro-optical effect, photoelectric conversion and signal extraction. Through the traveling wave and standing wave electrode composite loading and optical domain modulation mechanism, the bottleneck that the bandwidth of a traditional antenna is limited by impedance matching is broken through, high-sensitivity receiving is achieved within the ultra-wide band of 10 MHz to 20 GHz, and meanwhile the ultra-wide-band antenna has the advantages of being compact in structure and high in electromagnetic interference resistance and is suitable for ultra-wide-band weak field detection and high-precision electromagnetic signal receiving.

An electrically small antenna system modulates the Q factor of the antenna during electrical transmission to decrease the Q factor during signal transitions between frequency states thereby affecting an improved trade-off between antenna bandwidth and operating efficiency.