52 results about "Ku band" patented technology

The invention relates to the technical field of radar signal processing, in particular to a radar target analytical calculation method based on multi-dimensional data fusion and a radar device. Comprising the following steps: deploying a multi-band radar sensor array comprising an X band, a C band and a Ku band in a radar monitoring area; performing pulse compression and Doppler processing on the time domain echo signal, and extracting a time domain feature; spectral analysis is carried out on the frequency domain signals, and frequency domain features are extracted; performing angle estimation on the spatial signals, and extracting spatial features; a dynamic weight distribution model is constructed, a fusion weight is calculated through an adaptive algorithm based on three-dimensional quality indexes of a real-time signal-to-noise ratio (SNR), feature stability (SI) and data integrity (CI), and a joint representation vector containing time domain, frequency domain and space multi-dimensional information is generated. According to the invention, by deploying the multi-band radar sensor array, the recognition capability of the subtle feature difference of the target is improved.

The invention relates to a multiband radio frequency signal transmitting and receiving method, belongs to the technical field of microwave integrated circuits, and solves the problem that multiband integrated broadband transmitting and receiving are difficult to realize in an existing radio frequency transmitting and receiving mode. The method is divided into a multiband radio frequency signal receiving / transmitting method. The receiving method comprises the following steps of: performing up-conversion on a received radio frequency input signal to a K wave band through first-stage frequency mixing, performing down-conversion on the received radio frequency input signal to an S / C wave band through second-stage frequency mixing, performing down-conversion on the received radio frequency input signal to an L wave band intermediate frequency through third-stage frequency mixing, and generating a first L wave band intermediate frequency output signal; the transmitting method comprises the steps that an obtained second L-band intermediate-frequency output signal is subjected to fourth-stage frequency mixing up-conversion to the S / C band, is subjected to fifth-stage frequency mixing up-conversion to the K band and is subjected to sixth-stage frequency mixing down-conversion to the S / C / X / Ku band, and a radio-frequency output signal is generated; the first-stage frequency mixing up-conversion and the sixth-stage frequency mixing down-conversion are realized by the same bidirectional microwave link working in up-conversion and down-conversion regulation and control states respectively.

The invention provides a multi-band composite high-integration TR assembly. The multi-band composite high-integration TR assembly comprises a shell, a front multi-layer board, a back multi-layer board, a C / X / Ku band receiving and transmitting circuit, a C / X / Ku band single receiving circuit and a Ka band receiving and transmitting circuit, wherein the front multi-layer board and the back multi-layer board are connected in the shell, the C / X / Ku band receiving and transmitting circuit is connected with the front multi-layer board, and the Ka band receiving and transmitting circuit is connected with the back multi-layer board. The low-cost scheme design of an all-solid-state microwave multilayer board suitable for batch production and testing is adopted, ports and transmission line layout are reasonably designed, multi-band composite mode transmission is achieved in the form of the front face and the back face, a C / X / Ku-band transmitting circuit and an H-polarization receiving circuit are integrated on the front face, and the transmission efficiency is improved. A C / X / Ku frequency band V polarization receiving circuit and a Ka frequency band receiving and transmitting circuit are integrated on the reverse side, different functional circuits are respectively transmitted through a microstrip line and a strip line through an interface circuit structure covering 1-40 GHz and an in-board vertical transition structure, the isolation degree of different circuits is improved, mutual crosstalk between different signals is avoided, and the transmission efficiency is improved. And the functions of high integration, high consistency, ultra wide band, numerical control phase shift, numerical control attenuation and the like of the assembly are realized.

The present invention discloses a broadband dual-polarization antenna array, comprising a radiating network and a feeding network. The feeding network is used to convert electromagnetic waves in the form of a TEM mode input thereto into electromagnetic waves in the form of a TE10 mode and transmit them to the radiating network. The radiating network is used to radiate the electromagnetic waves transmitted thereto by the feeding network into free space. The radiating network is realized by arranging a partition structure consisting of four levels of metal steps in a rectangular slot in combination with metal branches arranged above the partition structure. The feeding network is realized based on a full parallel feed network consisting of a ridge waveguide structure, a micro-coaxial structure and a magic T. The advantage is that while having high gain and high efficiency, the bandwidth can cover the Ku band, meeting the requirements of Ku-band satellite communications.

The application provides an emergency information service system and method based on satellite communication and ground mobile communication fusion, the system comprises: a high flux satellite fixed station terminal, a Ku band 0.6 meter VSAT terminal is adopted, an ACU and a MODEM are integrated, a three-axis structure and a carbon fiber antenna are provided; a ground mobile communication subsystem, comprising a 4G skin base station, a security gateway and a signaling gateway; a multi-WAN port routing device realizes dynamic load balancing of satellite and ground broadband; an emergency power supply system is composed of a generator and a power bank to form a three-level power supply; a network management and monitoring system supports remote configuration and AI optimization. The method comprises the steps of disaster monitoring, system activation, network establishment, signal coverage, communication service and management and maintenance. The application combines AI driven network optimization to quickly establish a reliable communication network in an emergency scene through satellite and ground communication fusion, has the characteristics of wind load resistance, low time delay, intelligent scheduling and the like, and significantly improves the emergency communication guarantee capability.

The invention discloses a non-uniform phased-array antenna arrangement method and system of a ku frequency band, and relates to the technical field of array antenna design, and the method comprises the steps: building a target function with a sidelobe level, a beam width and a scanning range as a joint optimization target; in the ku frequency band, a non-uniform spacing distribution scheme of the array antennas is searched based on the adaptive crossover and mutation probability, and the distribution scheme is determined according to an objective function evaluation result; and performing error compensation optimization on the initial distribution by combining the online monitoring data and the target parameter difference, and generating a final antenna arrangement scheme. The problems that in the prior art, the arrangement optimization target is single, and the performance and cost of the phased-array antenna are affected are solved, and the technical effects of online monitoring, complete monitoring and good early warning capacity are achieved.

The invention provides a ku-frequency-band unmanned aerial vehicle countering radar and a target detection method and device, and belongs to the technical field of radars, and the ku-frequency-band unmanned aerial vehicle countering radar comprises a transmitting system which is used for outputting electromagnetic waves of a ku frequency band; the antenna is used for performing directional radiation on the electromagnetic waves of the ku frequency band and receiving echo signals reflected by a target object; the antenna comprises at least one array plane module, and the array plane module is detachably arranged. The receiving system is used for sending the echo signal received by the antenna to the signal processing system; the timing synchronization system is used for providing synchronous clock signals for the transmitting system and the receiving system; and the signal processing system is used for detecting the unmanned aerial vehicle based on the echo signals, determining motion state parameters of the unmanned aerial vehicle and outputting the motion state parameters of the unmanned aerial vehicle to the countering execution system. According to the ku-band unmanned aerial vehicle countering radar and the target detection method and device provided by the invention, the universality and flexibility of the unmanned aerial vehicle countering radar can be improved.

The invention discloses a cubic ZIF-67 / MXene wave-absorbing material as well as a preparation method and application of the cubic ZIF-67 / MXene wave-absorbing material. The preparation method comprises the following steps: reacting lithium fluoride, concentrated hydrochloric acid and deionized water to generate hydrofluoric acid, and etching an MAX phase to obtain MXene; the preparation method comprises the following steps: dispersing CoCl2. 6H2O, cetyl trimethyl ammonium bromide (CTAB) and MXene in deionized water to form a solution A; dispersing 2-methylimidazole in deionized water to form a solution B; quickly pouring the solution A into the solution B, stirring and reacting, centrifuging, freeze-drying and annealing to obtain the cubic ZIF-67 / MXene wave-absorbing material. The material is of a multi-layer sandwich structure, the reflection loss at 16.69 GHz can reach-20.79 dB, the matching thickness is 1.87 mm, the effective absorption bandwidth (RL is smaller than or equal to-10 dB) is 6.19 GHz (11.81-18.00 GHz), and the Ku wave band is covered. The method is environment-friendly in process, low in cost, simple and convenient to operate and suitable for large-scale production, and has application prospects in the fields of microwave absorption, infrared stealth and photocatalysis.

This invention discloses a wide-bandwidth, wide-angle metamaterial microwave absorber covering the L, S, C, X, and Ku bands, belonging to the field of stealth technology. The unit structure of the microwave absorber includes an upper FR4 plate with three-dimensional printed high-resistivity carbon paste, a middle paper honeycomb support layer, and a bottom magnetic material attached to a metal plate. The upper FR4 plate provides microwave absorption performance at mid and high frequencies, while the bottom magnetic material provides microwave absorption performance at low frequencies. The two are fixed by the paper honeycomb of the middle support layer. By combining a three-dimensional microwave absorber with magnetic materials, this invention achieves wide-bandwidth, wide-angle microwave absorption performance. The composite microwave absorber structure constructed by this invention has high structural strength and achieves lightweight design.

The application discloses a cross-band frequency reconfigurable planar phased array antenna with a modular chip antenna unit, which is composed of a 2N*2N chip antenna unit array arrangement, N is a natural number greater than or equal to 1, and the chip antenna unit sequentially comprises a dielectric matching layer module, an air layer, a chip antenna module and a multilayer PCB carrier board module from top to bottom; the dielectric matching layer module and the chip antenna module interact with the electromagnetic waves radiated thereby, so as to improve the active standing wave ratio and cross polarization characteristics of the chip antenna unit, and the air layer is used for adjusting the distance between the dielectric matching layer module and the chip antenna module; the dielectric matching layer module, the air layer, the chip antenna module and the multilayer PCB carrier board module jointly realize the cross-band frequency reconfiguration function of the chip antenna unit from the C band to the Ku band. The frequency reconfiguration range of the application is 10 GHz, and the problems of single working frequency band, poor anti-interference ability and low aperture utilization of the traditional phased array antenna are solved.

The application belongs to the technical field of controllable metamaterials and radomes, and particularly relates to a controllable low-profile dual-polarized A-T-A absorbing and transmissive metasurface and radome, which comprises an absorbing screen and a transmissive screen arranged in layers; the absorbing screen comprises a plurality of periodically arrayed absorbing screen units, each of which comprises a dielectric substrate I, a metal foil micro-unit attached to the upper surface of the dielectric substrate I, and an energy consumption piece loaded on the metal foil micro-unit; the application improves the RCS reduction effect of metal, enables the antenna to maintain good radiation characteristics in the Ku band, and enables free communication; meanwhile, the application has good absorbing performance in the X band and the Ku band on both sides of the passband, reduces the RCS of the antenna, and achieves the stealth purpose of the antenna.

The application belongs to the technical field of satellite communication interference protection, and specifically discloses an interference cancellation device and method for a Ka and Ku frequency band multi-mode satellite communication ground station, wherein the device comprises: a sampling antenna module, which is used for collecting Ku / Ka frequency band sampling signals from space; a radio frequency receiving module, which is used for selecting the polarization direction of the sampling signals based on the polarization mode of the satellite communication antenna and converting the sampling signals into sampling intermediate frequency signals; a sampling signal selection module, which is used for dividing the sampling intermediate frequency signals into sub-signals and selecting different frequency band sub-signals based on the working frequency band of the satellite communication terminal; and a signal processing module, which is used for obtaining interference cancellation output signals free of interference by performing interference cancellation on the fth satellite communication signal through an adaptive filtering algorithm based on N-path target frequency band sampling intermediate frequency sub-signals. The application is suitable for the satellite communication ground station for realizing Ka / Ku dual-band multi-mode communication through a radio frequency switch matrix shared satellite communication antenna, and realizes mutual decoupling of anti-interference processing between different satellite communication terminals.

This invention discloses a method for beam control of unconventional radar arrays. The method includes establishing a reference benchmark and initializing array parameters based on the unconventional radar array, determining core radar control parameters, determining radar beam control parameters, determining complex weighting coefficients for radar digital receiver multi-beam synthesis, and completing the radar array digital receiver multi-beam synthesis. This solution is applicable to unconventional phased array antennas with subarray-level random rotation and subarray-level random misalignment, and is compatible with beam control of conventional arrays. It has low computational complexity and introduces beam pointing accuracy error ≤0.01° and phase error ≤1° (Ku band and below), placing it at an industry-leading level. It is applicable to various phased array antenna architectures and has promising application prospects.

The application discloses a kind of effective Fennel reflection coefficient calculation method based on sea wave spectrometer, first by least square fitting anisotropic quasi-speculum scattering formula, the slope variance component of observation azimuth is obtained;The variation law of the slope variance component with azimuth is fitted with azimuth cosine function, to obtain the total slope variance of the detected sea surface, slope variance component fluctuation rate and sea surface wave propagation direction;Then by the slope variance component along the wave propagation direction and total slope variance, the distribution of the slope variance component perpendicular to the detection azimuth with observation azimuth is obtained;Finally, by calculating the non-standardized correlation coefficient between observation azimuth and the slope variance perpendicular to observation azimuth angle, the 0 degree effective Fennel reflection coefficient of different incident angle beams can be obtained according to quasi-speculum scattering formula, and the effective Fennel reflection coefficient of Ku band at 0 degree incident angle can be obtained by averaging the results of each beam with wind speed.

The present application relates to a kind of low profile composite material strip line antenna unit, Ku band array antenna, belong to radar and communication antenna field.Antenna unit includes polyimide single-sided copper-clad plate, PMI polymethacrylimide foam, polyimide single-sided copper-clad plate, PMI polymethacrylimide foam and polytetrafluoroethylene glass cloth double-sided copper-clad plate, six layers of different thickness plane material are made by bag pressure high temperature gluing.The upper layer polyimide copper-clad layer corrosion octagonal hole is used as the aperture of antenna unit radiation, polytetrafluoroethylene glass cloth double-sided copper-clad layer and metallized via array constitute the radiation cavity of antenna unit, the middle layer polyimide copper-clad plate is used as antenna feeder, and pentagonal patch is stretched into radiation cavity resonance, and electromagnetic wave is radiated through the aperture of upper layer.The present application has the characteristics of light weight, low profile, wide bandwidth, small loss, easy processing and the like by composite material strip line feed.

The utility model belongs to the technical field of filter structures, and particularly relates to a KU-frequency-band low-loss microstrip filter structure design which comprises a machine body and a prompting mechanism, the two ends of the machine body are fixedly connected with connector assemblies, the prompting mechanism is arranged on the connector assemblies, the prompting mechanism comprises an outer cylinder detachably connected to the connector assemblies, and the outer cylinder is arranged on the machine body. The inner side of the outer cylinder is rotationally connected with an inner cylinder, an observation opening is formed in the end, close to the inner cylinder, of the outer cylinder, and a prompt mark is arranged on the surface of the end, close to the outer cylinder, of the inner cylinder. According to the utility model, the inner cylinder and the outer cylinder can move relatively when the joint assembly and the connector are loosened, so that a maintainer can judge whether the joint assembly and the connector are loosened by observing whether a prompt sign is exposed in the observation port or not; and relative rotation between the connector assembly and the connector can be hindered through friction between the outer barrel and the inner barrel, and the loosening situation is reduced.

1. Name of the product in this design: Emergency Call Terminal (KU band). 2. Purpose of this design: For receiving emergency broadcast signals in the Ku band, parsing instructions, and ultimately achieving audio amplification and early warning. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The application provides a nano-aerogel material with excellent radiation refrigeration and millimeter wave wave transmission performance and a preparation method thereof, the nano-aerogel material is formed by a high-crosslinking-density silicon-containing polymer matrix and a trisilanol ethyl polyhedral oligomeric silsesquioxane through a crosslinking reaction and supercritical fluid drying, the nano-aerogel material has a bimodal nanopore structure composed of small pores and large pores, the porosity is 92% to 94%, and the nano-aerogel material has the radiation refrigeration and millimeter wave wave transmission performance. The nano-aerogel material has a wave transmission rate of at least 99.5% in the Ku band, and even can reach 99.7%, and the passive cooling performance of the nano-aerogel material can reach a delta T of 9.26 DEG C, and the nano-aerogel material has excellent millimeter wave wave transmission performance and radiation refrigeration performance.

This invention proposes a broadband traveling wave suppression metamaterial, wherein the broadband traveling wave suppression metamaterial, a metal connection region, and an aircraft wing trailing edge skin are sequentially connected. The broadband traveling wave suppression metamaterial is disposed at the end of the metal connection region of the aircraft wing trailing edge skin. The impedance of the end of the broadband traveling wave suppression metamaterial near the end of the metal connection region is matched with the impedance of the end of the metal connection region, and the impedance of the broadband traveling wave suppression metamaterial gradually changes steplessly from near to far from the end of the metal connection region. The broadband traveling wave suppression metamaterial of this invention achieves excellent traveling wave suppression performance in the P to Ku bands and is maintenance-free; it solves the pain points of traditional traveling wave suppression materials, such as difficulty in low-frequency traveling wave suppression and high maintenance costs.

The invention provides an active frequency selective surface with polarization independence and angle stability, which comprises a dielectric substrate and cross-shaped metal rings arranged on the dielectric substrate periodically, the tail end of each arm of each cross-shaped metal ring is provided with a notch, each notch is bridged with a PIN diode, and the PIN diode is connected with the dielectric substrate. The cross-shaped metal ring and the four PIN diodes symmetrically arranged on the cross-shaped metal ring jointly form a 90-degree rotational symmetric structure, so that the active frequency selective surface has highly consistent frequency response characteristics for incident electromagnetic waves in different polarization directions; by synchronously controlling the on-off states of all PIN diodes, the resonant frequency of the active frequency selective surface is switched between two frequencies in a Ku wave band, the problem of polarization sensitivity caused by anisotropy of a traditional adjustable structure is fundamentally solved, and excellent polarization independence is achieved.

The invention relates to the technical field of electronic countermeasure load antenna array design, in particular to an unmanned aerial vehicle-mounted antenna array for unmanned aerial vehicle-mounted satellite chain ground node traceability, and the antenna array comprises a substrate, eight antenna units, and low-noise amplification modules connected with the antenna units in a one-to-one correspondence manner. Wherein the working frequency bands of the eight antenna units cover a Ku wave band of uplink communication of a star chain terminal, and the whole antenna adopts a fan-shaped ladder-shaped array structure: every two antenna units form a column, and array elements in the same column are of a vertical coplanar dual-element structure, so that the high consistency of channel response is ensured, and a hardware basis is provided for weak signal detection based on cross-correlation; the space amplitude and phase difference base line is constructed for amplitude-comparison and phase-comparison combined direction finding, meanwhile, light-weight design is combined, the space amplitude and phase difference base line is well matched with an unmanned aerial vehicle platform, and integrated coupling of the interception function and the direction finding function of star chain uplink signals is achieved.

The invention provides a high-selectivity one-to-four filtering power divider based on stub loaded resonators and T-shaped E-plane stepped waveguides, which relates to the technical field of filtering power dividers and comprises a third-order stub filter and a four-way power divider. An input signal firstly passes through the third-order stub filter and then is divided into four paths of output signals through the four-path power divider. Through the synergistic effect of the stub loaded resonators and the E-plane stepped waveguides, six transmission zeros can be generated on the two sides of a Ku wave band pass band, the steepness of the edge of the pass band reaches-40 dB or below, pass band and stop band signals are effectively distinguished, the frequency selectivity is improved, and the problems that in the prior art, the pass band transition bandwidth is large, and interference suppression is poor are solved.

The invention discloses a broadband radio frequency optical fiber time delay assembly based on a dispersion optical fiber compensation technology, which relates to a signal processing technology and comprises an electro-optical conversion transmitting module, an optical fiber distribution network module and a photoelectric conversion receiving module which are in communication connection in sequence, and the electro-optical conversion transmitting module is composed of a DFB light source, a broadband electro-optical modulator and a bias control panel. The external modulation of the light intensity of the radio-frequency signal is realized; the optical fiber distribution network module is composed of an MEMS optical switch matrix, a specific-length optical fiber ring, an Ethernet switch control circuit and a C-band EDFA, and free combination and dispersion compensation of optical fiber channel lengths are achieved. The photoelectric conversion receiving module is composed of a broadband photoelectric detector and a radio frequency gain amplification and equalization circuit, and photoelectric conversion and processing of the optical carrier signal after time delay are achieved. According to the invention, true time delay of sub-millisecond optical signals in an L-Ku wave band range can be realized, and the method is suitable for large-angle scanning of phased array radar beams and large-range time delay processing of electronic warfare signals.

An improved antenna system is provided for controlling satellite communications in a satellite communication network. Antennas are disposed beneath a concave interior of a transmission surface. The transmission surface has a substantially similar shape or curvature of a radome top, and may be affixed to or integrated with the radome top to provide a phase compensated radome. The antennas may be mechanically moved, such as laterally translated, tilted, and / or rotated. The antennas may be electrically actuated via a switch. The transmission surface includes an array or patch of cells such as dual-band dual-polarized cells and / or quad-band dual-polarized cells. The improved antenna system enables high gain beam steering and Ku band, K band, and Ka band transmission and reception.

The invention provides a multi-channel KU-band high-duty-ratio TR module and an implementation method thereof, and relates to the technical field of radar equipment. The layout mode that the power supply low-frequency board is arranged on the radio frequency channel is adopted, the bottom of the radio frequency channel is directly embedded into the cavity, the radio frequency microstrip line has good transmission matching and extremely low insertion loss, no device or power supply low-frequency board is arranged on the back face of the chip with high heat consumption, and therefore the heat dissipation performance is improved; by designing a receiving channel and a transmitting channel of a radio frequency channel, the effect of multi-channel KU wave band high duty ratio is achieved, and a hardware basis is provided for self-inspection and self-calibration of a radar by combining a circulator with an antenna channel and a calibration channel. The power supply low-frequency board is arranged by adopting a PCB (Printed Circuit Board) laminated structure, power supply circuit division is carried out by arranging an insulating groove, and a traditional appearance through groove is replaced by a deep control groove, so that the problem that a gold wire cannot be bonded is perfectly solved, and the heat dissipation problem of the TR module is further solved.

The application discloses a preparation method of a CeO2-Co electromagnetic wave absorbing material. First, CeO2 nanorods with uniform sizes are prepared through a hydrothermal synthesis method; then, the CeO2-Co electromagnetic wave absorbing material is prepared through an impregnation method and a high-temperature calcination method; finally, the CeO2-Co material is uniformly mixed with carbon nanotubes and paraffin according to different filling amounts, is pressed into a ring with a thickness of about 1.5-2.5 mm under a specific mold, and electromagnetic wave absorbing performance test is carried out on the ring. Test shows that the reflection loss value of the material reaches -40 dB at 2.5 mm; the effective absorption bandwidth is 5.7 GHz (11.2-16.9 GHz), covering the entire Ku band and part of the X band.

The invention provides a KU-band phased-array antenna and radio frequency integrated board, and the integrated board comprises a dual-polarization feed line which is used for the polarization signal transmission of two lines; the broadband bridge is used for converting the received dual-linear polarization signals into transmitting and receiving circular polarization signals with different rotation directions; the broadband bridge is integrated in the same layer of the dual-polarization feeder line, and the broadband bridge is completely accommodated in the range of the antenna structure through the local avoidance design of the dual-polarization feeder line; by integrating a broadband bridge and a dual-polarization feeder line on the same printed board layer and adopting a local avoidance design, a single chip can realize receiving and transmitting dual-circular polarization, the channel utilization rate is improved, the number of times of lamination procedures and the number of layers of the structure are reduced, the system complexity and the manufacturing cost are reduced, the working bandwidth is expanded to KU frequency band full coverage, and the working efficiency is improved. Signal transmission path loss is reduced, double improvement of electrical performance and space efficiency is achieved, and the requirements for miniaturization and high performance of a high-frequency-band phased-array antenna are met.

A dual-band satellite antenna having a frequency switching function is described. One aspect of an embodiment relates to a dual-band satellite antenna having a frequency switching function, where the satellite antenna includes: an antenna unit for receiving a satellite signal; a first frequency processing unit configured to process a Ka band frequency for the satellite signal; a second frequency processing unit configured to process a Ku band frequency for the satellite signal; and a switching unit configured to select either the first frequency processing unit or the second frequency processing unit.

The application discloses a relativistic magnetron with a non-uniform corrugated waveguide output structure and belongs to the technical field of high-power microwave sources. The technical problems of traditional coaxial circular waveguide output mode limitation, low efficiency and complex structure are solved, and the structure design and part of working principles of the relativistic magnetron are improved, so that the microwave energy output with high efficiency and high power in the Ku band is realized, the output mode is TE01 mode, the efficiency and the power are improved, and the structure is simplified. Through the improvement of the structure design and part of working principles of the relativistic magnetron, the microwave energy output with high efficiency and high power in the Ku band is realized under low voltage and low magnetic field, the complex segmented resonant cavity design, the fan-shaped mode conversion structure and the built-in coaxial conductor are omitted, the structure is more simple, compact and convenient to process, and therefore the relativistic magnetron with the sunrise type anode and the non-uniform corrugated waveguide enhanced axial output structure has more advantages in actual application.

This invention discloses a broadband filtered L / S band circularly polarized-Ku band MIMO common-aperture antenna, relating to the field of microwave communication technology. The antenna includes a crossed dipole radiator, a dielectric substrate, four rectangular patches, four metal strips, a metal ground plane, a probe for exciting the Ku band MIMO antenna, and a feed axis for exciting the L / S band circularly polarized antenna. The crossed dipole radiator consists of rectangular patches and phase delay lines located on the upper and lower surfaces of the upper dielectric substrate. The phase delay lines provide a 90° phase difference, thus forming circularly polarized radiation. The positions of the rectangular patches and metal strips on the upper and lower surfaces induce coupling, broadening the impedance bandwidth and axial ratio bandwidth of the L / S band antenna. This invention features a simple structure, low cost, and superior performance. Furthermore, it achieves high isolation between the two frequency bands through a closed substrate integrated waveguide, and the Ku band antenna can also improve the performance of the L / S band antenna.