35results about How to "With ultra-wideband characteristics" patented technology

The invention relates to a coaxial-ridge waveguide-microstrip conversion structure ultra-broadband multi-channel power splitter. The input coaxial joint and the extended coaxial waveguide adopt a tapered coaxial gradual transition, and the tapered coaxial gradual transition And the ridge waveguide-microstrip conversion structure can realize ultra-wideband impedance matching; N ridge waveguide-microstrip conversion structures are uniformly distributed along the circumference in the extended coaxial waveguide to realize N-way parallel power division, and the entire power division circuit has axisymmetric To ensure that the signal amplitudes and phases of the N-channel power division signals are equal, the N-channel signal power division can be realized in one step, which can minimize the signal transmission loss. The present invention has ultra-wideband, low transmission loss, can realize any multi-channel power division output, each power division output signal has good amplitude and phase consistency, flat group delay characteristics in the band, and is easy to integrate with other peripheral planar circuits, etc. advantage. The invention is mainly used in microwave and millimeter wave power synthesis amplification systems, array antennas, etc., and has broad application prospects in microwave and millimeter wave systems such as communication and radar.

The invention discloses a 2.5-dimensional closed loop type frequency selective surface structure and a design method thereof. The structure comprises a first metal patch layer, a middle medium layer, a second metal patch layer and multiple metal holes. The metal holes pass through the above first metal patch layer, the middle medium layer and the second metal patch layer. The structure and size of the first metal patch layer are the same with that of the second metal patch layer. A part of rounded strip patches of the first metal patch layer is around a unit center with intervals to form a hexagonal ring, the other part of rounded strip patches with intervals is around the hexagonal ring with a certain distance to form six half hexagonal rings, and half hexagonal rings of two first metal patch layer units are connected in pairs to form a complete hexagonal ring which is completely same with the hexagonal ring of the center. The frequency selective structure in the invention has an ultra-wide stop band characteristic, the equivalent cell size of a frequency selective surface is reduced, the structure is combined with most thick skins, shells and other structures, and the electrical performance of the structure is exerted.

The invention discloses a broadband substrate integrated waveguide circulator and belongs to the technical field of microwave devices. The broadband substrate integrated waveguide circulator comprises a rectangular dielectric substrate 5, a back metal floor and a front metal pattern. A metal pattern 1 in a regular triangle shape is positioned in the middle of the front metal pattern, and the metal pattern 1, the dielectric substrate 5 and the back metal floor form a three-port substrate integrated waveguide structure in 120-degree rotational symmetry. The substrate integrated waveguide structure comprises a central round window, and a central junction gyromagnetic ferrite 3 is internally arranged in the round window. Three ports of the substrate integrated waveguide structure are formed by connecting three trapezoidal micro-strip transition lines 2 in quarter central wavelength with three 50-ohm standard micro-strip lines 6 serving as a T-type port and positioned at the edge of the substrate 5. The broadband substrate integrated waveguide circulator has high isolation performance within all X-bands (8.2GHz-12.4GHz), low insertion loss and low port standing waves, and has the advantages of miniaturization, high power, integration and low cost.

The invention belongs to the technical field of the material, and specifically relates to an ultra wide band energy selection surface. The ultra wide band energy selection surface comprises a medium substrate, a first metal structure printed on an upper surface of the medium substrate, and a second metal structure printed on a lower surface of the medium substrate; the first metal structure is twogroups of same rail-mounted combination shapes; each rail-mounted combination shape comprises two mutually parallel cross metal strips and a plurality of mutually parallel longitudinal metal trips for connecting two cross metal strips; the longitudinal metal strips are arranged at intervals, and a plurality of diodes is loaded on each longitudinal metal strip; the second metal structure is a gridcomposed of the metal strips. The ultra wide band energy selection surface disclosed by the invention has the advantages that the multilayer metal periodic structure and the PIN diodes are used for realizing the frequency selection feature on incident electromagnetic wave and the energy selection feature for sending the electromagnetic energy, and the ultra wide band energy selection surface is anovel and self-adaptive front-door electromagnetic signal suppression technology.

The present invention relates to a multi-stopband ultra-wideband antenna based on split ring resonators and patch etching gaps, comprising a disk antenna and a split ring resonator coupling micro-strip structure. A lower surface metal clad layer (2) is the ground of a feeder part. An upper surface metal clad layer (3) comprises an antenna radiation unit (4), a micro-strip feeder (5), a trapezoidal impedance transformation line (6) and a split ring resonator (8), wherein, the antenna radiation unit (4) adopts the disk antenna on which split ring shape gaps (7) with the same circle center are arranged; the back of the disk antenna has no metal area; the micro-strip feeder (5) adopts a micro-strip line form; the micro-strip feeder (5) and the antenna radiation unit (4) are in impedance matching connection through the trapezoidal impedance transformation line (6); the split ring resonator (8) comprises two pairs of resonators, namely a first resonator (9) and a second resonator (10), which are symmetrically distributed on two sides of the feeder; each resonator is formed by an inner split ring and an outer split ring, and the opening direction of the inner ring is far away from the feeder, while he opening direction of the outer ring is close to the feeder.

A small ultra-wideband omnidirectional antenna comprises one radiation floor, one insulating medium, one feed body shaped in a conical shell, one radiating body shaped in the conical shell, at lease one short circuit body and one feed joint. The insulating medium is installed on the radiation floor. The feed body is installed on the insulating medium. The radiating body extends upwards at the upper end of the feed body to be formed, and a taper angle of the radiating body is larger than that of the feed body. Two ends of each short circuit body are respectively connected with the radiating body and the radiation floor. The feed joint is provided with an inner metal core connected with the feed body. The small ultra-wideband omnidirectional antenna is smaller in size and has an ultra-wideband feature.

The invention provides a multiple stop band ultra wideband antenna which is realized based on a two-segment type ladder impedance resonator, has working characteristics of ultra wideband and can restrain the interference of multi-frequency signals; the antenna comprises a medium substrate(1) and two layers of metallic coatings which are coated on the upper and the lower surfaces of the medium substrate(1) respectively, wherein the metallic coating(2) of the lower surface is of the metallic ground of a feeder part(5), and the metallic coating(3) of the upper surface comprises an antenna radiating unit(4), a feeder(5) and a multi-band stop filter(7), wherein the antenna radiating unit(4) which is disc-shaped; no metallic ground (2) is distributed behind the disc; the radiating unit adopting the structure has ultra wideband characteristics; the feeder part(5) adopts a microstrip line form, and the multi-band stop filter(7) and a ladder-formed impedance conversion line(6) are connected between the feeder part(5) and the antenna radiating unit(4), wherein the ladder-formed impedance conversion line(6) carries out the impedance matching connection.

The invention discloses an ultra wide wave band near-infrared electromagnetic wave absorber which comprises a substrate, a first metal film, a second metal film and monolayer medium ball arrays. The first metal film is deposited on the substrate with the thickness of more than 100 nanometers and the monolayer medium ball arrays of different sizes and / or different materials are mixed and arranged on the first metal film. The second metal film is deposited on the monolayer medium ball arrays. The ultra wide wave band near-infrared electromagnetic wave absorber has a perfect absorption effect on ultra wide wave band near-infrared electromagnetic waves of large incidence and is not sensitive to polarization of the near-infrared electromagnetic waves. The ultra wide wave band near-infrared electromagnetic wave absorber has the advantages of being simple in craft, low in cost, high in repetition and capable of mass production and being possessed with wide application prospect in fields such as electromagnetic probing, absorbing and transforming.

The invention provides a multi-frequency-point broadband signal generator which mainly comprises a digital circuit module, and a local oscillation source module and a channel module which are connected with digital circuit module, wherein the local oscillation source module is also connected with the communication module. The invention has the beneficial effects that: the multi-frequency-point broadband signal generator is implemented by phase locking and frequency mixing, and can work normally in a bandwidth of 1GHz; furthermore, stray deterioration possibly occurred in a circuit is well suppressed; high stray performance and high phase noise performance are realized; and a good technical foundation is laid for synchronously outputting a plurality of frequency points.

The invention relates to a multi-frequency antenna, which comprises a ground plane, a radiation conductor, a parasitic conductor and a feed-in wire, wherein the radiation conductor comprises a feed-in part, a first radiation arm and a second radiation arm; the feed-in wire comprises a central wire and an external wire; the feed-in part is provided with a coupling edge; the parasitic conductor is connected with the ground plane and provided with a coupling edge which is arranged along a profile of the coupling edge of the feed-in part, and a gap is formed between the coupling edge of the parasitic conductor and the coupling edge of the feed-in part; the central wire is connected with the feed-in part; and the external wire is connected with the ground plane. The low-frequency resonance mode is excited through the first radiation arm and the second radiation arm and the high-frequency resonance mode is excited through the parasitic conductor, so that an antenna system integrally covers various operation frequency bands and has the characteristic of ultra wide band; and simultaneously the composition structure of the antenna is simplified.

The invention belongs to the technical field of the material, and specifically relates to an ultra wide band energy selection surface. The ultra wide band energy selection surface comprises a medium substrate, a first metal structure printed on an upper surface of the medium substrate, and a second metal structure printed on a lower surface of the medium substrate; the first metal structure is twogroups of same rail-mounted combination shapes; each rail-mounted combination shape comprises two mutually parallel cross metal strips and a plurality of mutually parallel longitudinal metal trips for connecting two cross metal strips; the longitudinal metal strips are arranged at intervals, and a plurality of diodes is loaded on each longitudinal metal strip; the second metal structure is a gridcomposed of the metal strips. The ultra wide band energy selection surface disclosed by the invention has the advantages that the multilayer metal periodic structure and the PIN diodes are used for realizing the frequency selection feature on incident electromagnetic wave and the energy selection feature for sending the electromagnetic energy, and the ultra wide band energy selection surface is anovel and self-adaptive front-door electromagnetic signal suppression technology.

The invention discloses an ultra-wideband quasi-open slow-wave structure comprising two identical metal plates and supporting metal walls or mediums on the two sides. The center positions on the broad edges of the lower side of the upper metal plate and the upper side of the lower metal plate are each loaded with a striped metal ridge with periodic ups and downs along the longitudinal direction, wherein the width is Rw, the height is Rh, and the cycle length of the ups and downs is p. Thus, a striped electron beam channel is formed in the space between the striped metal ridges, and the height hb is the difference between the difference b of the metal plates and two times of ridge height Rh. The slow-wave structure has a natural electron beam channel, requires no additional processing, is of low processing difficulty and large coupling impedance, and is very beneficial to oscillation starting of a backward wave oscillator. The slow-wave structure is of low low-end cut-off frequency, and has the characteristics of ultra wideband and small high-frequency transmission reflection.

The invention discloses a low-outline ultra-wideband plow-shaped antenna, which consists of a dielectric substrate and a single-layer radiation copper layer coated on the dielectric substrate, wherein the copper layer comprises a coplanar waveguide impedance transformer (1), an open circuit cavity (2) and left-right symmetrical index-like radiators (3); a left trough line (12) of the coplanar waveguide impedance transformer (1) is connected with the index-like radiators (3) transitionally, a right trough line (13) is connected with the open circuit cavity (2), a central conduction band (11) is connected with the right-side index-like radiator, each index-like radiator (3) is provided with a dual I-shaped loading groove (4) which has an upper structure and a lower structure, and a lower transverse loading groove (43) of an upper I shape is connected with an upper transverse loading groove (45) of a lower I shape through a transverse narrow grooved wire (44); and the central conduction band (11) of the coplanar waveguide impedance transformer (1) has a rectangular stepped gradually changing structure. The low-outline ultra-wideband plow-shaped antenna has a simple structure, covers 4:1 bandwidth, has good directing property, and can be used in the field of ultra-wideband wireless communication.

The invention discloses an ultra-wideband bionic antenna with a low radar scattering cross section, and mainly solves the problems that existing ultra-wideband antenna radar has high scattering cross section and can be easily found by radar. The ultra-wideband bionic antenna with the low radar scattering cross section comprises a radiation unit (2), a radiant floor (3) and an SMA coaxial adapter substitute. The antenna radiating unit and the antenna radiation floor are respectively printed on both sides of a medium material board (1), and are respectively connected with an inner core (4) and an outer core (5) of the SMA coaxial adapter substitute. The radiating unit is designed to be a sectoral structure comprising a rectangular column and a plurality of arc strips symmetrically arranged on the rectangular column in accordance with a design thinking similar to insect antennae, the degrees of the central angles of the arc strips are identical, and the sizes of semi-diameters are progressively increased according to equal intervals from the top to the bottom; and both sides of the radiant floor are rectangles with inversed 90-degree arc angles. The invention has the advantages of wide frequency band and good hiding performance, thereby being capable of being used as the ultra-wideband antenna on a hiding target vector.

The invention discloses a single-sideband frequency conversion amplification high-power high-frequency microwave field intensity sensing method and device based on a stimulated Brillouin scattering effect. The invention aims to solve the problems of high cost and large system size caused by the adoption of a multi-antenna mode due to narrow frequency band coverage of a single antenna when a high-power high-frequency space microwave signal is detected by adopting an electrical microwave field intensity sensing probe in the prior art. The device comprises a laser emission module, an optical local oscillator module, an adjustable pumping module, a microwave optical amplification module, an optical electric field sensing probe, an optical receiving frequency conversion module, a microwave power detection module and a data acquisition processing and display module. Low-noise amplification of signal light to be measured is realized by using a stimulated Brillouin scattering amplification method, and down-conversion of the signal to be measured is realized by using an optical carrier microwave signal all-optical frequency mixing method, so that the electric field intensity of a high-frequency and high-power microwave signal can be measured by using a low-frequency detector and a low-speed data acquisition card.

The invention discloses a broadband planar reflective array antenna with a wider phase compensation range. The technical scheme adopted is as follows: the planar reflective array antenna includes a feed source and a conductive planar reflective array surface; the feed source is used for emitting or receiving electromagnetic waves; the conductive planar reflective array surface is used for scattering the electromagnetic waves emitted by the feed source into planar waves or receiving the planar waves and converging the planar waves onto the feed source; and a number of reflection units are distributed in an array on the conductive planar reflective array surface, and each reflection unit includes a phase hole and four branches distributed on the phase hole. The planar reflective array antenna is characterized in that twigs extend in the same direction from one side of the branches, the twigs extend near the edges of the phase holes, and slots for are formed between the twigs and the edges of the phase holes to adjust and control phase compensation and working frequency.

The invention provides a high-efficiency super-surface device for realizing large field of view imaging based on a dielectric continuous structure. The device comprises a dielectric grating structure(1), a dielectric substrate (2) and a dielectric continuous structure (3), and the monolithic imaging half field of view reaches 88 degrees. The continuous structure designed by the invention has theadvantages of high efficiency, large bandwidth and the like, also has angular insensitivity, and still has high efficiency under large-angle incidence. The scheme of the invention realizes large fieldof view imaging with characteristics of single piece, flat plate, light weight, thinness and integration.

The invention relates to a low-cost embedded wearable antenna, which comprises a radiation patch (3), a strip line (4), a ground plane (5), an upper PDMS dielectric substrate and a lower PDMS dielectric substrate. The antenna adopts a coplanar waveguide feeding mode for feeding, namely the ground plane (5), the radiation patch (3) and the strip line (4) are positioned on the same plane; and the radiation patch, the ground plane and the strip line are embedded into the upper PDMS dielectric substrate and the lower PDMS dielectric substrate to form an embedded structure. The center frequency ofthe antenna is 5.8 GHz, the reflection coefficient at the resonant frequency is-26.20 dB, the working bandwidth is 5.25-10.54 GHz, and the antenna can be used for medical service at the frequency bandof 5.725-5.875 GHz. The low-cost embedded wearable antenna has the characteristics of ultra-wideband characteristic and the like, and is higher in stability, lower in cost and more convenient to process.

The invention provides a multiple stop band ultra wideband antenna which is realized based on a two-segment type ladder impedance resonator, has working characteristics of ultra wideband and can restrain the interference of multi-frequency signals; the antenna comprises a medium substrate(1) and two layers of metallic coatings which are coated on the upper and the lower surfaces of the medium substrate(1) respectively, wherein the metallic coating(2) of the lower surface is of the metallic ground of a feeder part(5), and the metallic coating(3) of the upper surface comprises an antenna radiating unit(4), a feeder(5) and a multi-band stop filter(7), wherein the antenna radiating unit(4) which is disc-shaped; no metallic ground (2) is distributed behind the disc; the radiating unit adoptingthe structure has ultra wideband characteristics; the feeder part(5) adopts a microstrip line form, and the multi-band stop filter(7) and a ladder-formed impedance conversion line(6) are connected between the feeder part(5) and the antenna radiating unit(4), wherein the ladder-formed impedance conversion line(6) carries out the impedance matching connection.

The multi-stop band ultra-wideband antenna based on miniaturized dual-mode resonators and zero-order resonators includes a dielectric substrate (1), and a lower surface metal coating (2) covered on the upper and lower surfaces of the dielectric substrate (1), and the upper surface Metal coating (3); the metal coating (2) on the lower surface is the ground of the feeder part, which adopts an isosceles trapezoidal design to meet the impedance matching requirements between the feeder (5) and the antenna radiation unit (4); the metal coating on the upper surface The coating (3) includes the following parts: antenna radiation unit (4), feeder (5), first dual-mode ladder impedance resonator (8), second dual-mode ladder impedance resonator (9), third dual-mode Ladder impedance resonator (10), zero-order split ring resonator (11), the antenna has a simple structure, small size, meets the requirements of planar circuit integration, and has the advantages of low cost and convenient mass production, so it is suitable for various Anti-interference ultra-wideband applications.

The invention discloses a low-outline ultra-wideband plow-shaped antenna, which consists of a dielectric substrate and a single-layer radiation copper layer coated on the dielectric substrate, whereinthe copper layer comprises a coplanar waveguide impedance transformer (1), an open circuit cavity (2) and left-right symmetrical index-like radiators (3); a left trough line (12) of the coplanar waveguide impedance transformer (1) is connected with the index-like radiators (3) transitionally, a right trough line (13) is connected with the open circuit cavity (2), a central conduction band (11) isconnected with the right-side index-like radiator, each index-like radiator (3) is provided with a dual I-shaped loading groove (4) which has an upper structure and a lower structure, and a lower transverse loading groove (43) of an upper I shape is connected with an upper transverse loading groove (45) of a lower I shape through a transverse narrow grooved wire (44); and the central conduction band (11) of the coplanar waveguide impedance transformer (1) has a rectangular stepped gradually changing structure. The low-outline ultra-wideband plow-shaped antenna has a simple structure, covers 4:1 bandwidth, has good directing property, and can be used in the field of ultra-wideband wireless communication.

A small ultra-wideband omnidirectional antenna comprises one radiation floor, one insulating medium, one feed body shaped in a conical shell, one radiating body shaped in the conical shell, at lease one short circuit body and one feed joint. The insulating medium is installed on the radiation floor. The feed body is installed on the insulating medium. The radiating body extends upwards at the upper end of the feed body to be formed, and a taper angle of the radiating body is larger than that of the feed body. Two ends of each short circuit body are respectively connected with the radiating body and the radiation floor. The feed joint is provided with an inner metal core connected with the feed body. The small ultra-wideband omnidirectional antenna is smaller in size and has an ultra-wideband feature.

The invention provides a multi-frequency-point broadband signal generator which mainly comprises a digital circuit module, and a local oscillation source module and a channel module which are connected with digital circuit module, wherein the local oscillation source module is also connected with the communication module. The invention has the beneficial effects that: the multi-frequency-point broadband signal generator is implemented by phase locking and frequency mixing, and can work normally in a bandwidth of 1GHz; furthermore, stray deterioration possibly occurred in a circuit is well suppressed; high stray performance and high phase noise performance are realized; and a good technical foundation is laid for synchronously outputting a plurality of frequency points.

The invention discloses a broadband planar reflective array antenna with a wider phase compensation range. The technical scheme adopted is as follows: the planar reflective array antenna includes a feed source and a conductive planar reflective array surface; the feed source is used for emitting or receiving electromagnetic waves; the conductive planar reflective array surface is used for scattering the electromagnetic waves emitted by the feed source into planar waves or receiving the planar waves and converging the planar waves onto the feed source; and a number of reflection units are distributed in an array on the conductive planar reflective array surface, and each reflection unit includes a phase hole and four branches distributed on the phase hole. The planar reflective array antenna is characterized in that twigs extend in the same direction from one side of the branches, the twigs extend near the edges of the phase holes, and slots for are formed between the twigs and the edges of the phase holes to adjust and control phase compensation and working frequency.

The invention discloses a flexible antenna based on a metamaterial structure and a signal transmission device, and relates to the technical field of microwave antenna engineering, and the flexible antenna comprises a dielectric substrate which is used for providing support for the flexible antenna, a defected ground structure used for providing an antenna ground for the surface current in the flexible antenna, and having the surface with a plurality of grooves with the same shape and size to enable the defected ground structure to have metamaterial characteristics, and a microstrip oscillator used for radiating the flexible antenna signal. The flexible antenna based on the metamaterial structure has the advantages of high gain, ultra wide band and the like, can be conformal with various carriers, and is low in cost, wide in application and high in designability.

The invention provides a multiple stop band ultra wideband antenna which is realized by a three-segment type ladder impedance resonator coupling with a feeder, consisting of a medium substrate(1) and two layers of metallic coatings which are coated on the upper and the lower surfaces of the medium substrate(1) respectively, wherein the metallic coating(2) of the lower surface is of the ground of a feeder part, and the metallic coating(3) of the upper surface comprises an antenna radiating unit(4), a feeder(5) and a three-segment type ladder impedance resonator(8), wherein the antenna radiating unit(4) which is disc-shaped; no metallic ground (2) is distributed behind the disc; the antenna radiating unit(4) adopting the structure has ultra wideband characteristics; the feeder part(5) adopts a microstrip line form, and the feeder(5), the three-segment type ladder impedance resonator(8), a ladder-formed impedance conversion line(6) and the antenna radiating unit(4) are connected in series and carry out the impedance matching by the ladder-formed impedance conversion line(6); the feeder part of the three-segment type ladder impedance resonator(8) adopts a direct angle form(7) to realize the partial coupling.

The invention discloses an active ultra wide band balance-unbalance transformation converter comprising a receiving antenna connector electrically connected to an ultra wide band antenna and configured to receive a differential balance current carrying a transmission signal from the ultra wide band antenna; an impedance matcher that matches impedance for the differential balanced current for the ultra-wideband antenna; a differential amplifier configured to receive the differential balanced current from the impedance matcher and perform signal amplification; a filter which is configured to receive the amplified differential balance current from the differential amplifier and perform signal filtering; a high-frequency transformer which is configured to receive the filtered differential balanced current from the filter and convert the differential balanced current into a single-end unbalanced current; and a feeder cable connector which is electrically connected to the coaxial feeder cable and configured to receive the single-ended unbalanced current from the high-frequency transformer and transmit the single-ended unbalanced current to the coaxial feeder cable. According to the invention, insertion loss can be reduced, bandwidth can be improved, current balance degree can be improved, and impedance conversion and matching can be realized.

The invention provides a VHF ultra-wide-band oval polarized transmitting antenna. The ultra-wide-band oval polarized transmitting antenna comprises a main antenna, an auxiliary antenna and an antennamast; the main antenna is formed by four folded vibrators in a fixed connection manner; the folded vibrators are bent by stainless steel tubes integrally to form a rectangle to feed in the middle points of the long edges; the four folded vibrators are uniformly distributed on the same circumference, adjacent two folded vibrators are perpendicular mutually, and the axial line of each folded vibrator deviates for 18 degrees from the horizontal direction; a transmission line for connecting each vibrator is 25mm in length; the top end of a feeder line is connected with a transmission line of 56mmin parallel; the feeder line is reversely added with a choke tube of 30mm; the auxiliary antenna and the main antenna are the same in structure; the perpendicular distance between the auxiliary antenna and the main antenna is 60mm; and the auxiliary antenna and the main antenna are coaxially connected with the antenna mast through detachable joints. The ultra-wide-band oval polarized transmittingantenna can transmit perpendicularly and horizontally polarized waves at the same time, and can realize power distribution in two directions, so that the antenna is applicable to signal transmission of a ground station transmitter of civil and military airports for improving airport utilization rate.