174 results about "Relative bandwidth" patented technology

The invention relates to a miniaturized millimeter wave filtering magnetoelectric dipole antenna with high out-of-band rejection, and relates to the technical field of communication antennae, and the miniaturized millimeter wave filtering magnetoelectric dipole antenna with the high out-of-band rejection effect comprises a strip line feed structure which is used for generating a lower stop band radiation zero point; the n-shaped feed structure is used for feeding the magnetoelectric dipole; according to the magnetoelectric dipole radiator, a U-shaped groove is etched in a dipole patch, so that the size of the antenna is reduced; the parasitic metal strips are used for enhancing the radiation suppression effect of the upper stop band; the folding split rings are folded to reduce the size of the split rings and enhance the radiation suppression effect of the lower stop band at the same time; the inverted L-shaped short circuit branch is used for enhancing the radiation suppression effect of the upper stop band, the absolute bandwidth of the antenna is 21.1 GHz to 31.0 GHz, the relative bandwidth is 37.0%, the lowest gain is 5.0 dBi, the highest gain can reach 7.8 dBi, the suppression level from the in-band highest gain to the radiation zero point of the upper stop band is larger than 40 dBi, and the suppression level from the in-band highest gain to the radiation zero point of the lower stop band is larger than 50.0 dBi.

The invention belongs to the technical field of antenna engineering, and particularly relates to an ultra-wide-band low-profile phased-array antenna, which realizes broadband impedance matching characteristics and effectively expands the working bandwidth of the antenna by optimizing a dipole arm structure and introducing a matching branch knot and linear tapered slot composite structure on a radiation unit layer; on the array architecture level, an electromagnetic metasurface technology is adopted, array current distribution is improved through a periodic artificial electromagnetic structure, the active standing-wave ratio is remarkably reduced, the scanning angle of an array is widened, and meanwhile high compression of a system profile is achieved; on the structural design level, a three-dimensional composite structure of a transverse metal floor, a longitudinal radiation layer and a transverse metasurface layer is innovatively constructed, and the overall section height is reduced to 0.137 lambda Low (lambda Low is the lowest working frequency wavelength) through electromagnetic coupling and space folding technologies; in conclusion, the ultra wide band (the relative bandwidth is greater than or equal to 90%) and the low profile (lt; and the method is suitable for a new generation of broadband phased array radar system.

The invention provides an infrared broadband absorber. According to the invention, an efficient absorption structure is formed by introducing the non-antisymmetric Bragg structure layer and the metal material film with relatively high absorption rate. The phase change material and the dielectric material form an antisymmetric Bragg structure, the absorptivity of the device is further improved, and the MgF2 low-refractive-index layer is combined, and the materials and the thickness of each layer are optimized, so that effective reflection suppression and absorption enhancement of light with different wavelengths are realized. Compared with the prior art, the infrared broadband absorber is simple in structure, the absorption effect of 90% or above can be achieved within the ultra-wide range, the relative absorption bandwidth exceeds 152.8%, a great opportunity is provided for ultra-wide spectrum detection, a feasible technical approach is provided for ultra-wide spectrum confrontation and invisibility, and the infrared broadband absorber has the advantages of being high in practicability and wide in application range. And confrontation and stealth on active and passive composite sensing detection equipment are expected to be realized, and the application potential of the material in the fields of infrared absorption, infrared stealth, photothermal conversion, sensing and the like is expanded.

The embodiment of the utility model provides a partition plate circular polarizer and a transceiver all-in-one machine, the partition plate circular polarizer comprises a connector, a device chamber serving as a transmission channel is arranged in the connector, a first end of the device chamber is used for forming a square waveguide and transmitting electromagnetic waves, and a second end of the device chamber is used for forming a second waveguide; a first triangular inclined block and a second triangular inclined block are arranged at the first end of the device cavity; the utility model relates to the technical field of feed sources, solves the problem that the application requirements of a transceiver all-in-one machine are difficult to meet due to the fact that the circular polarization axial ratio characteristic of a circular polarizer in the related technology is poor, and can realize the separation of left-handed and right-handed dual circular polarization without additionally arranging an orthogonal mode coupler, thereby improving the transmission efficiency of the transceiver all-in-one machine and improving the transmission efficiency of the transceiver all-in-one machine. And the relative bandwidth is relatively wide, the requirements of the transceiver on broadband and low axial ratio can be met, and the polarizer has relatively good axial ratio characteristic.

The invention discloses an ultra-wideband 180-degree phase shift circuit which comprises a radio frequency signal input end, a radio frequency signal output end, an ultra-wideband balun with a center tap and a stub compensation line, a first matching compensation network, a second matching compensation network, a differential signal switch selection circuit and a control circuit. The ultra-wideband balun can realize conversion between a single-ended signal and a differential signal in an ultra-wideband frequency range, a first differential output port of the ultra-wideband balun is connected with one end of the first compensation matching network, and a second differential output port of the ultra-wideband balun is connected with one end of the second compensation matching network; a first differential port of the differential signal switch selection circuit is connected with the other end of the first compensation matching network, and a second differential port of the differential signal switch selection circuit is connected with the other end of the second compensation matching network; and the control circuit is used for controlling the differential signal switch selection circuit to switch and output 0-degree and 180-degree radio frequency signals. According to the invention, low-error phase shift precision can be provided within the frequency range of 2-20GHz and the relative bandwidth of 160%.

The present invention relates to the fields of ferroelectric single crystal technology and acousto-optical device technology, particularly to a silicon-based lead magnesium niobate (PbMn) single crystal piezoelectric wafer structure, preparation method, and application. The structure comprises a silicon substrate on which a silicon dioxide layer and a single crystal piezoelectric thin film layer are sequentially disposed; the single crystal piezoelectric thin film layer is a PbMn-PT single crystal, including a binary PMN-PT single crystal thin film or a ternary PIN-PMN-PT single crystal thin film. This piezoelectric wafer structure on a silicon substrate can be used to fabricate various high-performance piezoelectric MEMS sensors, actuators, and electro-optical modulator devices. The resulting surface acoustic wave (SAW) filters and thin film bulk acoustic wave (BAW) filters exhibit a relative bandwidth increase of over 50%, and the resulting electro-optical modulators exhibit lower half-wave voltage and higher electro-optical modulation efficiency. The device volume can be reduced by 10 times, better meeting the future 6G communication requirements for higher efficiency, higher integration, and miniaturization of MEMS devices. This provides a novel multilayer piezoelectric wafer structure for the miniaturization and integration of piezoelectric MEMS and optoelectronic devices.

The invention provides a novel broadband rectifier which is integrated with an initial coupling feedback network (CFN) and is applied to the field of wireless power transmission. The framework of the rectifier adopts a transmission line, the transmission line is bent into an L shape, and the transmission line and the CFN form an impedance matching network together. The CFN has double functions: impedance matching is realized, rectified energy is recovered and fed back to a source, repeated rectification is carried out, and the rectification bandwidth is effectively widened. Through experimental manufacturing and testing of the rectifier, the result shows that the conversion efficiency of the rectifier in the frequency range of 0.6-2.5 GHz exceeds 50%, the peak efficiency reaches 70.6%, and the relative bandwidth reaches 122.5% under the conditions that the input power is 8dBm and the load is 1k omega.

The invention belongs to the field of antenna design, and particularly provides a low-profile broadband low-loss dual-polarized metasurface antenna which is used for solving the problems that an existing dual-polarized antenna is narrow in working band, high in profile, high in cross polarization and the like. According to the invention, the parasitic patch is introduced into the metasurface structure, so that the impedance matching bandwidth is increased; moreover, through the slot design of the patch, the polarization current is separated, the cross polarization is effectively inhibited, the resonance frequency points are increased, and the broadband radiation characteristic is realized. Besides, through the optimal design of the size of the patches and the distance between the patches, the matching effect of part of frequency points is optimized, and the gain sag of the two polarization directions at the high-frequency position is weakened; finally, the relative bandwidth of the dual-polarization metasurface antenna can reach 61.5%, the isolation degree in a working frequency band is larger than 37 dB, the profile height is only 0.095 lambda0, and the dual-polarization metasurface antenna has the stable lateral radiation characteristic. In addition, the antenna also has the advantages of simple structure, easy manufacturing, low assembling difficulty and the like.

The invention relates to an ultra-wideband sum-difference device applied to an X wave band and a Ku wave band. The ultra-wideband sum-difference device comprises a PCB, a sum port, a pitch difference port, an azimuth difference port, a one-to-four power divider, four one-to-three power dividers, four one-to-two power dividers, two bridges and a jumper. Wherein the one-to-four power divider is connected with the sum port and each one-to-three power divider; and each one-to-three power divider is respectively connected with two adjacent one-to-two power dividers and the quadrant port of the adjacent four-quadrant feed network. The first one-to-two power divider is connected with a first electric bridge; the second one-to-two power divider is connected with a second electric bridge; the third one-to-two power divider is connected with a jumper; the fourth one-to-two power divider is connected with a jumper; the jumper is also connected with the first bridge and the second bridge; the first bridge is also connected with the pitch difference port; and the second bridge is also connected with the azimuth difference port. By means of the design, the relative bandwidth of the ultra-wideband sum-difference device can be 100% and is greatly higher than the relative bandwidth of an existing waveguide sum-difference device and the relative bandwidth of an existing strip line sum-difference device.

The invention discloses a broadband wide-beam millimeter wave magnetoelectric dipole antenna, and belongs to the technical field of radio frequency front-end devices. The antenna mainly structurally comprises an upper-layer dielectric plate, a middle-layer dielectric plate, a lower-layer dielectric plate, a metal radiation through hole, a metal radiation patch, a parasitic unit through hole, a parasitic unit patch, a left feed through hole, a right feed through hole, a metal feed patch, a coaxial line and a metal ground. Wide impedance bandwidth in the range of 18.2-40.3 GHz is realized when the antenna works in a millimeter wave frequency band, the relative bandwidth exceeds 75%, and the antenna has wide beam width performance; the structure is simple and manufacturing is convenient.

The utility model designs an SIW filtering antenna based on a U-shaped groove structure, and the antenna comprises a dielectric substrate, a U-shaped groove is etched at the right center position, and an upper metal surface of a rectangular cut corner is cut off from the edge of a metal surface right above the U-shaped groove; the position of the coaxial feed structure is in the center of the substrate, the antenna feeds through a coaxial line, a U-shaped groove is loaded through the SIW resonant cavity, a corner is cut on the upper surface of metal to obtain high gain, and a filtering effect is generated. According to the utility model, the filtering antenna with high gain and compact structure is constructed by using only one layer of SIW resonant cavity, and the filtering antenna has good practicability. The working frequency band of the designed filtering antenna reaches 4.5 GHz-4. 7 GHz, the impedance relative bandwidth is 4.3%, the positions of 4.27 GHz and 5.19 GHz on the two sides of an antenna passband are each provided with a radiation zero point, the positions of the two radiation zero points are both-25dBi, and it is indicated that the antenna achieves the good filtering effect. And the maximum value of the gain in the passband is 8dBi. The filtering antenna realizes a good filtering effect in the Sub-6GHz frequency band of a 5G communication system, and has application value.

The broadband end-on-fire antenna works in the frequency band of 3.81 GHz to 8.97 GHz, a broadband end-on-fire antenna unit comprises a radiation main body, a feeder line and a parasitic structure, the radiation main body is formed by connecting solar battery pieces into solar battery piece strings and then connecting the solar battery pieces in parallel, the radiation main body is located on the upper surface of a dielectric plate, and the feeder line is connected with the parasitic structure. The feeder line is located on the lower surface of the dielectric plate for feeding, and port excitation is adopted for the radiation main body; and the parasitic structure is positioned on the outer side below the solar cells of the solar cell string, is connected with the solar cells and is used for improving impedance matching. By introducing the parasitic structure, the broadband antenna can cover the frequency band of 3.81-8.97 GHz, and the performance of the broadband antenna is realized. Besides, solar energy is fully utilized, the vertical design of the illumination direction and the communication direction of the antenna is realized, the relative bandwidth reaches 80.75%, and the system complexity is low.

The invention discloses an ultrathin single-layer dual-passband frequency selective surface structure, and belongs to the field of electromagnetic fields and microwaves. The frequency selective surface structure is formed by periodically arranging the same unit structures, and each unit structure comprises a single-layer dielectric substrate and a single-layer metal layer loaded on the upper surface of the dielectric substrate; the single-layer metal layer is formed by sequentially nesting three concentric annular patches, and the three concentric annular patches are respectively a metal mesh tightly attached to the boundary of the unit, four square metal rings bent outwards and arranged in the metal mesh, and four circular metal rings bent outwards and arranged in the square metal rings from outside to inside. The ultra-thin single-layer dual-passband frequency selective surface structure can form two passbands with high relative bandwidths when electromagnetic waves are incident, has excellent angle stability under TE and TM polarization, and can be used for improving the performance of the antenna by changing the size parameters of the square metal ring and the circular metal ring. The two transmission zero points can be regulated and controlled, so that the position of the passband is adjusted.

The present invention belongs to the field of antenna design, and specifically provides a low-profile broadband low-loss dual-polarization metasurface antenna to solve the problems of narrow working frequency band, high profile, high cross-polarization, etc. of existing dual-polarization antennas. The present invention introduces parasitic patches in the metasurface structure to increase the impedance matching bandwidth; and, through the slit design of the patch, the polarization current is separated, the cross polarization is effectively suppressed, and the resonant frequency is increased to achieve broadband radiation characteristics; in addition, through the optimization design of the patch size and the patch spacing, the matching effect of some frequency points is optimized, and the gain depression of the two polarization directions at high frequencies is weakened; finally, the relative bandwidth of the dual-polarization metasurface antenna in the present invention can reach 61.5%, the isolation within the working frequency band is greater than 37dB, the profile height is only 0.095λ0, and it has stable lateral radiation characteristics; and the antenna also has the advantages of simple structure, easy manufacturing, and low assembly difficulty.

The invention belongs to the technical field of antennas, and provides a broadband circularly polarized millimeter wave magnetoelectric dipole antenna which comprises an excitation port, a microstrip feeder line, a 0.127 mm thick dielectric plate, a bonding layer, a metal floor, a grounding copper column, a 1.575 mm thick dielectric plate, a radiation patch and a parasitic patch. According to the millimeter wave circularly polarized antenna disclosed by the invention, the circular arc-shaped patch and the rectangular patch are effectively overlapped, and the axial ratio bandwidths of the two antennas are combined, so that a new radiation patch is formed, the broadband is realized, the axial ratio of the designed antenna unit is increased from 29.72 GHz-33.19 GHz to 27.95 GHz-43.33 GHz on the premise that the existing radiation performance is not influenced, and the antenna unit has a wide application prospect. The frequency band range of the antenna impedance matching lower than-10dB is 23.8-61.6 GHz, and the impedance matching relative bandwidth reaches 88.5%; the range of the frequency band with the axial ratio lower than 3dB is 27.95-43.33 GHz, and the relative bandwidth of the axial ratio reaches 43.1%; the frequency band range of the 3dB gain is 25.09-42.09 GHz, the relative bandwidth of the 3dB gain reaches 50.6%, the maximum gain 9.6 dBic is achieved at the 34GHz, the performance is excellent in all aspects, and the requirement of a broadband wireless communication system can be met.

The invention belongs to the field of electromagnetic wave absorbing materials, and particularly relates to a thin broadband composite wave absorber based on a frequency selective surface. According to the invention, the wave-transparent layer is added in the middle of the multi-layer magnetic material, the mindset of simply stacking the same type of materials in the traditional multi-layer wave-absorbing structure is broken, and the wave-transparent layer is introduced to change the original characteristic that the impedance gradually changes in sequence; meanwhile, a magnetic wave-absorbing material, a frequency selection surface and a medium matching layer are subjected to composite design, the frequency selection surface generates an electromagnetic coupling effect at high frequency, phase and impedance conversion of electromagnetic waves in a multi-layer structure is controlled, and efficient impedance matching and electromagnetic wave energy dissipation in a broadband are achieved through electromagnetic absorption and interference cancellation; and an excellent wave absorbing effect is achieved. The total thickness of the composite wave absorber ranges from 0.064 lambda to 0.1 lambda, the-10 dB absorption bandwidth ranges from 3.3 GHz to 18 GHz, and the relative bandwidth reaches 138%; and meanwhile, the wave absorber has a wide angular domain characteristic under oblique incidence, and a novel thin broadband composite wave absorber scheme is provided.

The invention discloses a device for inhibiting grating lobes of an acoustic transducer array by using band-pass driving signals, which comprises an upper computer, an acoustic host and an acoustic transducer array which are connected in sequence, the acoustic host comprises a logic control circuit, N direct digital synthesis circuits connected with the logic control circuit, and N linear amplification circuits connected with the N direct digital synthesis circuits in a one-to-one correspondence manner, so that N channels are formed; and the acoustic transducer array is a linear regular arrangement array and comprises N transducer array elements connected with the N linear amplification circuits in a one-to-one correspondence manner, the width of each transducer array element is L, the spacing distance between the adjacent transducer array elements is dL, the resonance center frequency of each transducer array element is F, and the relative bandwidth is B. According to the invention, a good grating lobe suppression effect can be obtained with relatively low technical cost.

The invention discloses a transparent ultra-wideband electromagnetic shielding wave-absorbing body for a wireless and visible light communication integrated system. The transparent ultra-wideband electromagnetic shielding wave-absorbing body is formed by arranging one or more metamaterial units, each metamaterial unit is formed by tightly attaching an upper ITO-PET-PDMS structure and a lower ITO-PET-PDMS structure; each ITO-PET-PDMS structure comprises a transparent substrate PDMS layer, a polyethylene glycol terephthalate (PET) layer and an ITO ceramic thin film layer from top to bottom, and the transparent substrate PDMS layer, the PET layer and the ITO ceramic thin film layer are sequentially arranged from top to bottom. The structure designed by the invention has the characteristics of broadband wave absorption, wide-angle wave absorption and optical transparency. The transparent ITO ceramic thin film is adopted to construct a multi-resonance topological structure, the wave absorption rate of the transparent ITO ceramic thin film exceeds 90% at 4.2-16.3 GHz (the relative bandwidth is 118.0%), the wave absorption rate of the transparent ITO ceramic thin film exceeds 75% within the incidence angle of 60 degrees, and the transparent ITO ceramic thin film can be applied to electromagnetic energy absorption covering a plurality of wireless communication frequency bands such as GPS and WiMAX. The structure designed by the invention has high optical transmittance.

The invention belongs to the technical field of electromagnetic wave control, and particularly relates to an active regulation broadband wave-transparent FSS material. According to the invention, a three-layer structure is adopted, through the design of the patterned upper metal layer and the patterned lower metal layer, the eight variable capacitance diodes are supplemented, and the capacitance values of the variable capacitance diodes are adjusted, so that the simultaneous active tuning of the high bandwidth range of double passbands is realized, and both the passband 1 and the passband 2 have the broadband regulation and control range. The regulation and control range of the first transmission passband is 3.8 GHz to 7.3 GHz, and the controllable relative bandwidth range is 63.1%; the regulation and control range of the second transmission passband is 8.5 GHz to 12.0 GHz, and the controllable relative bandwidth range is 34.15%; the maximum insertion loss of the two passbands is 2.5 dB, the two transmission passbands can be regulated and controlled at the same time, more application scenes are met, and TE and TM polarization is not sensitive. The excellent active bandwidth regulation and control performance can be suitable for the multi-frequency communication requirements of various agile radar radomes.

The application claims a kind of multiband terahertz absorber based on laminated graphene structure, which is a laminated stack structure.The positive terminal of external power supply is connected to two layers of graphene, and the negative terminal is connected to a gold reflection layer.The Fermi energy level of graphene is controlled by voltage.The structure parameters of each layer, graphene and dielectric layer material characteristics are set.The absorber forms multiple absorption peaks in the 1~5 THz frequency band, with a peak absorption rate of over 90%.At 1.60 THz, a narrowband absorption of 93% is achieved, and at 2.54~4.28 THz, a broadband absorption with a relative bandwidth of 51% is achieved.The normalized equivalent impedance at the resonance frequency point is nearly perfectly matched with the free space impedance.The absorber also has good polarization angle insensitivity, with only slight absorption performance attenuation within an incident angle range of 0~60°.The absorption characteristics can also be adjusted by adjusting the key geometric parameters.The application can simultaneously achieve narrowband and broadband absorption, with excellent absorption performance, and is suitable for interference signal filtering in terahertz communication systems.

The disclosed technology provides a system and method for allocating frequency bands to a mobile device or user equipment (UE) based on priorities assigned to the different frequency bands. When no priority is assigned to the frequency bands, when a special or reserved priority is assigned, or when equal priority is assigned, the frequency band allocation to the UE is based on a default frequency allocation algorithm (e.g., based on a relative bandwidth of the different frequency bands). When a UE is capable of utilizing a first and a second frequency band, and the priority assigned to the first frequency band is higher than the priority assigned to the second frequency band, the network (e.g., eNB / gNB) overrides the default algorithm and preferentially allocates the first frequency band to UE even when the first frequency band has a smaller bandwidth than the second frequency band or when the default algorithm would otherwise prefer the first frequency band.

The invention provides a data scheduling method and system and switch equipment. The method comprises the following steps: initializing queue configuration information of data scheduling in a data center switch; extracting a relative bandwidth proportion of each data queue in the data center switch from the queue configuration information, and determining a relative quantum feature of each data queue through each relative bandwidth proportion; performing quota resetting on deficit counters of the data queues based on the relative quantum features of the data queues, determining the amount of data capable of being sent of the data queues through the deficit counters with the reset quota and the current data packet length of the data queues, and further updating the queue states of the data queues; and generating a next round of scheduling polling queue in the data center switch based on all queue states, and performing deficit polling scheduling on the data queues in the data center switch through the scheduling polling queue. Based on the scheme, cooperative scheduling of dynamic weight allocation and accurate deficit management in the switch can be realized, so that the bandwidth utilization rate of the switch can be improved.

The application discloses a dual-polarized microstrip patch antenna applied to a millimeter wave phased array, and belongs to the field of radio frequency front ends.The antenna mainly comprises two substrates and two patch structures, wherein the top patch is fed by two coaxial probes, the feeding port has two feeding slits, and the bottom patch is in a cross shape, which increases the cross-polarization ratio of the dual-polarized antenna radiation.The antenna realizes the dual-polarized characteristic at H plane + / -45 DEG, the 10dB relative bandwidth is 38.9%, and the radiation pattern half-power beam width is greater than 100 DEG. The antenna has the characteristics of simple structure and simple manufacturing, and can be rapidly printed and manufactured by adopting a planar microstrip structure.

The present invention discloses a millimeter-wave frequency band stripline probe antenna based on a microwave PCB. The antenna comprises a tapered horn, an air waveguide, a microwave PCB upper core board, a prepreg sheet (PP), a microwave PCB lower core board, and metalized vias. The microwave PCB upper core board, the prepreg sheet (PP), the microwave PCB lower core board, and the metalized vias are sequentially stacked and pressed together to form a microwave multilayer PCB. The tapered horn is connected to the air waveguide and then fixed to the upper surface of the microwave multilayer PCB by screws, forming a millimeter-wave frequency band stripline probe antenna. The present invention has the advantages of large relative bandwidth, low insertion loss, small standing wave, and adjustable antenna gain. Furthermore, the antenna has a simple and compact structure, low cost, and is easily integrated with a millimeter-wave chip on a microwave PCB.

According to the magnetoelectric dipole antenna, the coaxial feed communication bandwidth is larger than 100%, and the technical problems that broadband impedance matching and high-frequency mismatching are achieved, and the stability of a feed structure is poor are solved. According to the antenna, a meandering seam bending type electric dipole and a stepped flaring type magnetic dipole are cooperatively matched, and a feed structure and a U-shaped reflector are combined to integrally form the magnetoelectric dipole antenna. A meandering seam is etched on a horizontal rectangular patch, a vertical patch is welded on the outer side of the horizontal rectangular patch to form a three-dimensional radiator, and the three-dimensional radiator and a stepped flaring type cavity structure magnetic dipole form a closed structure. The feed structure comprises a coaxial line and two bent copper sheets, thereby realizing direct current grounding and providing mechanical reinforcement. 3.7 GHz and 4.2 GHz resonance points are introduced to realize 104.8% of relative bandwidth, while the compact structure is maintained, the broadband coverage and stable radiation characteristics are realized, the long-term reliability in an outdoor complex environment is ensured by a stable feed structure, part of 5G communication signals in a Sub-6G frequency band can be effectively covered, and the antenna is suitable for various wireless communication systems.

The application belongs to the technical field of wireless communication, and relates to the structural design of a broadband antenna, and specifically provides a low-profile broadband dual-polarized metasurface antenna which is composed of a microstrip feed network 5, a lower layer dielectric substrate 4, a metal floor 3, an upper layer dielectric substrate 2 and a metasurface radiation array 1 which are sequentially stacked from bottom to top. The structure of the metasurface radiation array is creatively designed through eigenmode analysis, so that the strongest current is regulated to the central rectangular patch, thereby enabling the microstrip feed structure to excite vertical and horizontal polarization radiation modes through the cross-shaped slot on the metal floor, realizing the dual-polarization and broadband characteristics of the antenna. Finally, the bandwidths of the two ports of the antenna cover 3.42-6.09 GHz and 3.56-6.24 GHz respectively, the relative bandwidths are 56.15% and 54.69% respectively, the maximum gains of the two ports in the passband can reach 10.4 dBi and 11.0 dBi respectively, and the profile height is only 0.085λ0. Moreover, the application has the advantages of simple structure, wide bandwidth, low profile, low processing and assembling difficulty and the like.

The 6G satellite communication terminal system comprises a grounding layer, a substrate layer, a feed layer and a radiation metal patch, the grounding layer is arranged at the lower end of the substrate layer, the feed layer is arranged at the upper end of the substrate layer, the radiation metal patch is of a square structure, and the radiation metal patch is arranged on the substrate layer. The radiation metal patches are arranged at the upper end of the feed layer in a matrix mode, cross-shaped gaps are etched in the upper end walls of the radiation metal patches, the radiation metal patches and the feed layer are electromagnetically coupled through the cross-shaped gaps, and the feed layer is provided with a T-shaped strip line matching network. According to the technical scheme of the invention, the electromagnetic decoupling of the Ku / Ka dual-frequency transceiving coplanar phased array can be realized (the isolation degree gt; 45 dB), and a broadband impedance modulation type power amplification technology (24-30 GHz relative bandwidth gt; 25%), a multilayer microwave composite board integrated framework (the thickness is lt; 2 mm, the interconnection loss lt; therefore, the requirement for light weight is met, scanning at a wide angle of + / -60 degrees is supported, and the consistency of a directional diagram of the antenna is also improved.

The invention provides an ultra-wideband Wilkinson power divider based on a liquid crystal material, relates to the technical field of microwaves, and completes impedance matching between transmission lines by designing the length and characteristic impedance of the transmission lines and adopting a specific isolation resistor structure. Uniform distribution and isolation of microwave signals in multiple layers of media including a liquid crystal layer are achieved. Modeling simulation is carried out on the power divider in three-dimensional electromagnetic field simulation software, the simulation result shows that the overall insertion loss of the power divider is smaller than 3.6 dB, and the relative bandwidth reaches 100%.

The utility model discloses a full-wave oscillator unit and an antenna. The full-wave oscillator unit comprises a bottom plate, an oscillator support and an antenna radiation oscillator, the antenna radiation oscillator is arranged on the front surface of the bottom plate, the antenna radiation oscillator and the bottom plate are arranged in parallel up and down, and the antenna radiation oscillator is supported by the oscillator support on the bottom plate; wherein two oscillator arms in the 45-degree direction and the-45-degree direction of the antenna radiation oscillator form a crisscross dual-polarized radiation unit. The antenna provided by the utility model has the characteristics of high gain, low cost and simple structure. The antenna mainly covers a relatively wide working frequency band of 698MHZ-960MHZ, and the relative bandwidth reaches 32%; the radiation gain of 9-10db is realized by the unit oscillators; a plurality of unit oscillators form an array antenna to realize broadband and high gain performance; through printed board processing, the size consistency is improved; the assembly structure is simple, and production efficiency is improved.

The utility model discloses a microstrip patch antenna which comprises a dielectric substrate and a radiation patch. The radiation patch is arranged on the dielectric substrate, the radiation patch is E-shaped, the parallel edge of the E-shaped radiation patch is defined as a first sub-radiation patch, the vertical edge of the E-shaped radiation patch is defined as a second sub-radiation patch, and the length of the first sub-radiation patch is larger than or equal to 2.1 mm and smaller than or equal to 2.5 mm. The E-shaped structure enables the current to bypass between the first sub radiation patch and the second sub radiation patch, which is equivalent to increasing the electrical length of the radiation patch and reducing the resonant frequency of a fundamental mode, so that the low-frequency band bandwidth is broadened; the edges of the first sub-radiation patch and the second sub-radiation patch can generate strong electromagnetic field coupling to excite an additional parasitic resonance mode, so that the frequency band is further widened, and the bandwidth of the microstrip patch antenna is effectively widened. Wherein the first sub radiation patch of 2.1 mm to 2.5 mm enables the resonant frequency of the microstrip patch antenna to range from 43.7 Ghz to 55.1 Ghz, the relative bandwidth is 23%, and high bandwidth is achieved.