27 results about "Terahertz antenna" patented technology

The invention provides a terahertz antenna structure and precoding method based on a mixed single-layer and double-layer delay line, and the method comprises the steps: firstly, analyzing the relation between the position of an antenna and the delay range of a delay line based on a single-layer delay line structure, and designing a brand new delay line deployment scheme; secondly, designing a mixed single-layer and double-layer delay line structure based on a brand new delay line deployment scheme, namely, adopting a single-layer delay line structure in the middle part of an antenna needing to provide small time delay, and adopting a double-layer delay line structure at two end parts needing to provide large time delay; then calculating the maximum time delay of the mixed single-layer and double-layer delay line structure, and quantifying the hardware complexity of the mixed single-layer and double-layer delay line structure based on the maximum time delay; and finally, designing a hybrid analog digital pre-coding scheme based on the hybrid single-layer and double-layer delay line structure. According to the invention, the hardware complexity and power consumption of the terahertz antenna structure are effectively reduced, and high spectrum efficiency is maintained.

A system for facilitating managing of terahertz wave energy. The system includes a terahertz antenna, a sensor, and a processing device. Further, the terahertz antenna is configured to be operable in a terahertz frequency range. Further, the terahertz antenna is configured for managing terahertz electromagnetic waves having terahertz wave energy. Further, the sensor is configured for generating data associated with the terahertz antenna and an environment of the terahertz antenna. Further, the processing device is communicatively coupled with the sensor. Further, the processing device is configured for analyzing the data and generating a signal for the terahertz antenna based on the analyzing. Further, the processing device is communicatively coupled with the terahertz antenna. Further, the terahertz antenna is associated with parameters. Further, the parameters of the terahertz antenna are adjusted based on the signal. Further, the managing of the terahertz wave energy is based on the adjusting of the parameters.

The present invention discloses a terahertz dynamic inductive thermal radiometer, comprising a superconducting thin film layer, a terahertz antenna, a cutoff layer, and a Si substrate. The superconducting thin film layer and the terahertz antenna are respectively deposited on the cutoff layer, which is deposited on the Si substrate. The superconducting thin film layer includes a superconducting feeder, an interdigital capacitor, and an inductor coil. The interdigital capacitor and the inductor coil are connected in parallel to form an oscillating circuit. The terahertz antenna is adjacent to the inductor coil and is used to convert received terahertz signals into heat, causing the inductor coil to produce an inductance change. This inductance change causes the resonant frequency within the interdigital capacitor to change. The superconducting feeder receives the changed resonant frequency, and the changed resonant frequency can be used to obtain the light intensity of the terahertz signal, thereby completing terahertz signal detection. The terahertz dynamic inductive thermal radiometer can accurately detect terahertz signals and is less affected by temperature. The present invention also provides a method for preparing the terahertz dynamic inductive thermal radiometer and a terahertz detection system.

The invention discloses a small terahertz antenna pedestal, and belongs to the technical field of antennas. The seat frame comprises a base, an orientation assembly and a pitching assembly. The azimuth assembly is driven by a high-precision azimuth direct drive motor, is connected with an azimuth turntable through an azimuth diaphragm, and drives the azimuth turntable to rotate on a high-precision turntable bearing. The pitching assembly is driven by a high-precision pitching direct drive motor and drives a pitching box body provided with an antenna reflector to rotate between the left and right support arm combinations through a pitching diaphragm and a pitching shaft. And the left and right support arm assemblies are supported by double P2-level angular contact ball bearings, so that the structural rigidity and stability are obviously enhanced. Through the transmission mode that the direct drive motor is combined with the flexible diaphragm, the return stroke error caused by gear transmission is eliminated, high-precision and high-stability motion control over the azimuth axis and the pitching axis is achieved through the design of the high-precision bearing and the adjustable balance weight, and the small-sized terahertz antenna system is particularly suitable for being used for a small-sized terahertz antenna system with the extremely high pointing precision requirement.

This invention discloses a high-aperture-efficiency terahertz antenna, comprising: a metal resonant cavity unit, which includes a metal feed layer and a metal resonant layer stacked sequentially, wherein the metal resonant layer has a resonant through slot; and a metasurface structure unit stacked and connected to the surface of the metal resonant layer, the metasurface structure unit including a first metal layer, a dielectric substrate, and a second metal layer stacked sequentially connected to the surface of the metal resonant layer, wherein a hollow position is formed in the center of the second metal layer, and an M-row N-column metasurface reflector component is disposed within the hollow position, where M and N are both 5-7. Based on the metal feed layer and the metasurface structure unit with the dielectric substrate, this antenna achieves high aperture efficiency and high gain in the terahertz band, stable beam performance, a simple and highly integrated antenna structure, and high circular polarization conversion efficiency, meeting the requirements of long-distance communication.

Disclosed in the present invention is a terahertz kinetic inductance bolometer, including a superconducting thin film layer, a terahertz antenna, a cutoff layer and a Si substrate, wherein the superconducting thin film layer and the terahertz antenna are respectively deposited on the cutoff layer, and the cutoff layer is deposited on the Si substrate; the superconducting thin film layer includes a superconducting feeder line, an inter-digital capacitor and an inductor coil; the inter-digital capacitor is connected with the inductor coil in parallel to form an oscillation circuit; the terahertz antenna is adjacent to the inductor coil and is used to convert a received terahertz signal into heat so that the inductor coil produces an inductance change; a resonance frequency in the inter-digital capacitor changes through the inductance change; and the superconducting feeder line receives the varying resonance frequency, through which an light intensity of the terahertz signal can be obtained to complete the detection of the terahertz signal. The terahertz kinetic inductance bolometer can detect the terahertz signal accurately and is less affected by the temperature. The present invention also provides a preparation method of the terahertz kinetic inductance bolometer and a terahertz detection system.

The application provides a dual-frequency microstrip combined antenna and relates to the technical field of terahertz antennas. The dual-frequency microstrip combined antenna comprises a dielectric substrate, a metal radiation patch layer arranged on the dielectric substrate, a pair of center-symmetrically arranged bowtie antennas and a pair of circular patch antennas, the circular patch antennas being connected to one end of the bowtie antennas close to the center of symmetry, and a feeding area arranged at the center of symmetry of the bowtie antennas. Through the combination of the bowtie antennas and the circular patch antennas, the original current distribution of the antenna is changed, the working frequency band of the antenna is widened, resonance points can be formed in multiple frequency bands, and the problems of low return loss and small gain of the existing antenna are solved.

This application discloses a multimode signal decomposition and simulation system and method for radio frequency targets. The system includes a signal simulation device for simulating multiple signals generated by the same radar electronic device; a control unit for generating control instructions based on the target location to be simulated and sending them to a microwave cabinet, a millimeter wave cabinet, and a near-terahertz cabinet; the microwave cabinet, the millimeter wave cabinet, and the near-terahertz cabinet for converting the received microwave signals into microwave signals, millimeter wave signals, and near-terahertz signals, respectively, and sending them to the corresponding microwave antennas, millimeter wave antennas, and near-terahertz antennas; and a control unit for controlling the microwave triple antenna, the millimeter wave triple antenna, and the near-terahertz triple antenna to perform vector synthesis on the received signals, thereby achieving signal radiation in the three frequency bands of microwave, millimeter wave, and near-terahertz at the same location. This application can simulate the simultaneous generation of multiple signals from the same target.

The invention discloses a terahertz broadband directional diagram reconfigurable slot antenna, belongs to the technical field of terahertz radio frequency front-end devices, and adopts a radiation unit and a four-direction symmetrical coplanar waveguide feed structure to realize dynamic beam reconstruction in combination with a composite beam ohmic contact type MEMS switch array. The technology is simplified through a single-layer quartz glass substrate, a multi-mode resonant cavity and a tunable artificial electromagnetic surface are integrated, the surface impedance is dynamically adjusted through an MEMS switch, the high-frequency dispersion effect is compensated, and the gain flatness is maintained. Through a three-mode beam reconstruction algorithm and control switch on-off combination,-40-degree, 0-degree and + 40-degree three-beam fast switching is achieved, the main lobe width covers 55.61-108.38 degrees, and the wide angular domain requirement is met. The technical contradiction of high gain, wide angular domain coverage and fast beam reconstruction of the terahertz antenna is effectively solved, and a high-performance and miniaturized solution is provided for 6G communication, intelligent radars and high-speed wireless transmission systems.

The invention discloses a terahertz wave decoherence method, a terahertz wave decoherence system and an imaging system. The terahertz wave decoherence method comprises the following steps: carrying out active phase modulation on coherent terahertz waves by adopting a reconfigurable phased array comprising a plurality of array elements with independent terahertz wave phase regulation freedom degrees, and regulating and controlling the number of effective array elements of the reconfigurable phased array and / or the phase regulation and control change rate of the effective array elements, and the first-order coherence function modulus value of the terahertz wave is reduced, so that the terahertz wave decoherence is realized, and the intrinsic time coherence length of the terahertz source is not changed. The reconfigurable phased array is used for performing decoherence modulation, and the variable capacitance characteristic of the SBD is used, so that the phased array receives different voltages to cause the change of junction capacitance, thereby causing the change of the resonance mode of the terahertz antenna, realizing terahertz phase modulation, particularly realizing active and controllable terahertz decoherence operation, and further optimizing the terahertz imaging effect.

The application discloses a broadband slot array antenna for terahertz signal emission and reception and a feed network thereof, and belongs to the technical field of terahertz technology.The antenna comprises a substrate layer, a ground metal layer and a dielectric layer which are arranged in layers, the ground metal layer is fixedly attached to one side surface of the substrate layer, the dielectric layer is fixedly attached to the surface of the ground metal layer away from the substrate layer, and the three are fixed in layers to form an integrated antenna base; a plurality of long slot-shaped terahertz electromagnetic wave transceiving windows arranged in parallel are formed in the ground metal layer, each terahertz electromagnetic wave transceiving window is provided with a plurality of feed points along the length direction of the terahertz electromagnetic wave transceiving window, and the feed points are used for adapting a feed structure to realize excitation, radiation and reception of terahertz electromagnetic waves.The application can realize broadband and high-gain transceiving of terahertz signals, and solves the technical problems of limited bandwidth and great difficulty in feed design of existing terahertz antennas.

The low-loss high-conversion-efficiency and high-bandwidth dual-circular-polarization terahertz antenna comprises an orthogonal converter and a horn antenna, the other end of a first rectangular waveguide and the other end of a second rectangular waveguide are combined into a third port, and a step partition plate is arranged between the first rectangular waveguide and the second rectangular waveguide on the front side of the third port. The horn antenna is fixed on the orthogonal converter through a fixing part, a through hole is formed in the fixing part, the pyramid horn antenna is communicated with the third port through the through hole in the fixing part, a plurality of layers of square-like steps are arranged in the through hole, the plurality of layers of square-like steps are composed of at least four layers of steps, and the cross section of each layer of step is a quadrangle with arc-shaped end angles, namely a square-like shape. In the direction from the orthogonal converter to the horn antenna, the sectional area of each square-like step is gradually increased, and the arc radius of each square-like step is gradually increased and is closer to a circle. The antenna has the characteristics of wide bandwidth, low reflection loss and high energy transmission efficiency.

The application discloses a kind of field effect transistor terahertz detector chips of quadtree structure array, including chip substrate and field effect transistor terahertz detector array;Field effect transistor terahertz detector array is prepared on the surface of chip substrate using semiconductor technology, and is arranged in quadtree structure array on chip substrate;Field effect transistor terahertz detector is composed of field effect transistor and terahertz antenna, and the characteristic size of terahertz antenna is smaller and the center frequency is higher closer to the center position of field effect transistor terahertz detector array;The field effect transistor terahertz detector of different terahertz frequency band is integrated on a chip in the application, can realize the detection of wide-spectrum terahertz wave, solve the problem that the current field effect transistor terahertz detector detects narrow spectrum, and the array arrangement mode of quadtree structure can effectively reduce the area of chip, to reduce chip cost.

The invention discloses a terahertz horn antenna, a terahertz antenna array and terahertz equipment, which are applied to the technical field of terahertz devices, and comprise a standard rectangular waveguide, a first double-ridge waveguide, a second double-ridge waveguide, a third double-ridge waveguide and a double-ridge horn mouth which are in contact coupling connection in sequence along a terahertz wave transmission direction, the ridge height of the double-ridge horn mouth is gradually reduced in a stepped manner along the transmission direction of the terahertz waves; in the terahertz wave transmission direction, the sizes of the cross sections of the ridges of the first double-ridge waveguide, the second double-ridge waveguide and the third double-ridge waveguide are gradually increased in the thickness direction. The terahertz horn antenna is prepared by using the waveguide with the double-ridge structure and the horn mouth, so that strong constraint and energy focusing on a mode field are realized, the caliber of the horn is effectively reduced, and meanwhile, relatively high radiation gain and directional diagram stability are kept. The three-stage double-ridge waveguide is arranged between the standard rectangular waveguide and the double-ridge horn mouth, so that the serious influence of the welding precision and the structure parasitic effect on the performance in the traditional probe feed is avoided.

The invention provides a terahertz antenna array with low cost, low cross polarization and high gain. The terahertz antenna array comprises a metal waveguide feed layer and a radiation array layer, the metal waveguide feed layer comprises a feed waveguide, an E-plane T-shaped junction, two offset waveguides and two differential excitation plane parabolic reflectors, the feed waveguide is used for vertical feed, the E-plane T-shaped junction is connected with the feed waveguide and the two offset waveguides, the two offset waveguides are located at the focal points of the two plane parabolic reflectors respectively, and the two plane parabolic reflectors are connected with the E-plane T-shaped junction. The two plane parabolic reflectors are in mirror symmetry, the reflecting surfaces of the plane parabolic reflectors are paraboloids, and the short-circuit surfaces are the short-circuit ends of the plane parabolic reflectors; the radiation array layer is used for coupling and radiating energy from the metal waveguide feed layer. Two plane parabolic reflectors which are distributed in a mirror image mode and feed in a differential mode are arranged in the metal waveguide feed layer, the high-gain characteristic can be achieved, and the whole antenna array can keep extremely low cross polarization.

The invention discloses a multi-mode signal decomposition and simulation system and method for a radio frequency target. The system comprises signal simulation equipment used for simulating various signals generated by the same radar electronic equipment; the control unit is used for generating a control instruction according to a target position to be simulated and sending the control instruction to the microwave cabinet, the millimeter wave cabinet and the near terahertz cabinet; the microwave cabinet, the millimeter wave cabinet and the near-terahertz cabinet are respectively used for converting received microwave signals into microwave signals, millimeter wave signals and near-terahertz signals and sending the microwave signals, the millimeter wave signals and the near-terahertz signals to the corresponding microwave antenna, the millimeter wave antenna and the near-terahertz antenna; and the control unit is used for respectively controlling the microwave triple antenna, the millimeter wave triple antenna and the near terahertz triple antenna to carry out vector synthesis on the received signals so as to realize signal radiation of three frequency bands of microwaves, millimeter waves and near terahertz at the same position. The system can simulate the same target to generate various signals at the same time.

A system for facilitating managing of terahertz wave energy. The system includes a terahertz antenna, a sensor, and a processing device. Further, the terahertz antenna is configured to be operable in a terahertz frequency range. Further, the terahertz antenna is configured for managing terahertz electromagnetic waves having terahertz wave energy. Further, the sensor is configured for generating data associated with the terahertz antenna and an environment of the terahertz antenna. Further, the processing device is communicatively coupled with the sensor. Further, the processing device is configured for analyzing the data and generating a signal for the terahertz antenna based on the analyzing. Further, the processing device is communicatively coupled with the terahertz antenna. Further, the terahertz antenna is associated with parameters. Further, the parameters of the terahertz antenna are adjusted based on the signal. Further, the managing of the terahertz wave energy is based on the adjusting of the parameters.

The invention discloses a 6G terahertz dual-polarized antenna, relates to the technical field of wireless communication, and aims to solve the problems of narrow frequency band, low gain and high profile of a microstrip antenna in terahertz antenna design in the prior art. The antenna comprises a metasurface structure layer, a first substrate layer, a second substrate layer, a ground plane layer, a third substrate layer and a horizontal feed layer in the Y-axis direction of the antenna, the metasurface structure layer comprises a target metasurface unit and a cross-shaped patch located at the center of the target metasurface unit; therefore, the terahertz dual-polarized antenna can realize large bandwidth, low profile and high gain under the terahertz frequency, the performance of the terahertz dual-polarized antenna is improved, and the stability and reliability of a 6G signal in long-distance transmission are ensured.

The utility model provides an antenna structure applied to terahertz, a terahertz system-on-chip and a power transmission framework. The antenna structure is characterized in that an electromagnetic band gap structure is additionally arranged between a terahertz antenna array and a feed structure; the electromagnetic band gap structure comprises a metal frame and a plurality of electromagnetic band gap units. The plurality of electromagnetic band gap units are periodically arranged on the metal frame; and in the stacking direction, the terahertz antenna array is framed in the metal frame. The transmitting antenna of the transmitting end and the receiving antenna of the receiving end in the terahertz system on chip both adopt the antenna structure. The power output end of the first circuit in the power transmission framework is connected with the transmitting end of the terahertz system-on-chip, and the power receiving end of the second circuit is connected with the receiving end of the terahertz system-on-chip. According to the scheme, the antenna performance is optimized, the terahertz system chip scale packaging is realized, the complexity and the cost of microwave wireless power transmission are reduced, and the integration level is improved.

The present invention designs an ultra-wideband high-gain terahertz antenna device that is easy to integrate with a photodiode, comprising an antenna radiating arm, a dielectric substrate, an antenna feeding structure, and a dielectric lens; the antenna radiating arm is used to transmit traveling wave current and form electromagnetic radiation, thereby realizing wireless transmission of signals from the waveguide structure to free space; the middle layer of the dielectric substrate is used to support the antenna radiating arms on both sides, and the upper and lower dielectric substrates play a packaging and protection role. The feeding structure is used to achieve a broadband feeding effect, while making it easy for the antenna to form a planar integration with the terahertz photodiode. The dielectric lens is used to converge the antenna radiation energy, thereby making the antenna radiation pattern more directional and improving the overall gain of the antenna device. The terahertz antenna device proposed above adopts a transition feeding structure from a grounded coplanar waveguide to a microstrip line, which not only realizes a broadband design of the antenna, but also makes the planar structure easy to integrate with the photodiode at the transmitting front end of the optoelectronic terahertz communication system.

The invention discloses a Seebeck effect-based carbon nanotube flexible terahertz detector and a preparation method thereof, and the detector sequentially comprises a flexible substrate, a metal oxide grid electrode, a first electrode antenna, a second electrode antenna and a carbon nanotube film PN junction from bottom to top, the intrinsic P-type carbon nano tube comprises an intrinsic P-type carbon nano tube and an N-type carbon nano tube formed by chemical doping; the preparation method provided by the invention does not need a high-temperature process, so that the deformation of the flexible material is avoided, and the structural stability is improved. Coupling of various enhancement structures is achieved, and the requirement for high sensitivity of a terahertz detector is met. In the aspect of structural design, the preparation process of the N-type doped carbon nanotube is post-positioned, so that the condition of dedoping or degeneration of the material due to the influence of the subsequent process is avoided. According to the invention, the PN junction of the carbon nano tube is coupled with the terahertz antenna of the asymmetric electrode, so that a high-response carbon nano tube terahertz photosensitive structure is formed, and near-zero power consumption detection of terahertz radiation signals is realized.

This invention discloses a Fabry-Perot resonant cavity antenna based on a hybrid partial reflector element, belonging to the field of millimeter-wave / terahertz antenna technology. The antenna includes a partial reflector surface, a feed source, and a metal ground plane. The partial reflector surface includes a positive phase gradient element group and a negative phase gradient element group. The positive phase gradient element group is composed of multiple identical first element arrays arranged in an array, located in the central region of the partial reflector surface. The negative phase gradient element group is composed of multiple identical second element arrays arranged around the positive phase gradient element group. By surrounding the positive phase gradient element group with the negative phase gradient element group, electromagnetic waves irradiating the center of the partial reflector surface achieve in-phase superposition after multiple reflections, while low-energy electromagnetic waves irradiating the periphery are radiated outwards, thus fully utilizing the electromagnetic wave energy within the cavity. This reduces frequency sensitivity while ensuring high antenna gain and increasing antenna bandwidth.

This invention provides a silicon-based photonic terahertz wireless communication transmitter front-end chip, system, and method, including a silicon photonic chip. The silicon photonic chip generates an electro-optical comb, interleaving the comb teeth according to a predetermined transmission frequency, dividing the comb teeth into multiple groups according to predetermined conditions, and modulating the comb teeth of different groups separately. This invention proposes a multifunctional silicon-based chip design that interleaves the selection of multi-wavelength signals generated by the on-chip electro-optical comb and drives micro-ring modulator arrays with different resonant wavelengths. The chip output signal is connected to a photodetector and a terahertz antenna array, thereby realizing the generation of multi-channel, high-capacity photonic terahertz signals. The chip-level system has a small size and strong scalability.

The invention provides a design method of an electroformed surface terahertz antenna reflector. The design method comprises the following steps: step 1, adjusting the value of the thickness of an electroformed metal layer, restraining the thickness of a bonding transition layer, the thickness of a composite plate of a composite support back frame, the density of the composite support back frame, the height of the composite support back frame and the temperature to be unchanged; obtaining a relational expression of the thickness of the electroforming metal layer to the precision change of the antenna profile; step 2, obtaining a relational expression of the thickness of the pasting transition layer to the precision change of the antenna profile; step 3, obtaining a relational expression of the thickness of the composite plate of the composite support back frame to the precision change of the antenna profile; step 4, obtaining a relational expression of the density of the composite supporting back frame to the precision change of the antenna profile; step 5, obtaining a relational expression of the height of the composite supporting back frame to the precision change of the antenna profile; step 6, obtaining the relationship between the temperature and the precision change of the antenna profile, and obtaining the optimal values of all parameters; the antenna reflector designed by the invention is not only suitable for a satellite load, but also suitable for a ground system.

The invention relates to a communication signal transmitting method and device, a communication chip and equipment, and the method comprises the steps: obtaining a target optical signal based on a radio frequency signal and carrier light modulation; performing power division processing on the target optical signal to obtain a first optical signal and a second optical signal; transmitting a first optical signal through the optical antenna array; combining the second optical signal and local oscillation light to obtain a third optical signal; performing beat frequency processing on the third optical signal to obtain a terahertz electric signal; terahertz electric signals are transmitted through the terahertz antenna array. By adopting the method, the communication distance of the communication signal transmitting device can be improved.

The present invention belongs to the field of terahertz communication, and specifically relates to a signal processing method for realizing terahertz frequency up-conversion. After the terahertz signal received by the terahertz antenna and the pump laser output by the pump light source generating device are combined by a dichroic mirror, they are collinearly injected into an alkali metal sample cell provided in a heating device. The ultraviolet collimated light mixed with the residual pump laser and the terahertz signal output by the alkali metal sample cell passes through a filter to obtain ultraviolet collimated light. By performing photoelectric detection on the ultraviolet collimated light, signal processing after the frequency up-conversion of the terahertz signal is realized. The device based on this method has a simple structure, the used devices are maturely developed, and the cost is low; moreover, the ultraviolet collimated light and the terahertz signal have consistent time-resolved characteristics, can directly copy all the information carried by the terahertz signal completely, and have a low bit error rate; the ultraviolet detector has extremely high sensitivity, requires a low conversion rate for four-wave mixing, and is easy to realize the frequency up-conversion of the terahertz signal.

The application discloses a terahertz photoconductive antenna and a regulating method, and solves the problem of determining whether the focal length of laser focused on the light guide excitation area of a terahertz antenna module is appropriate. The terahertz photoconductive antenna comprises a laser beam splitting unit, which is used for transmitting laser output by a laser source module to a laser converging unit and reflecting laser returned by the laser converging unit. The laser converging unit is used for focusing the laser transmitted by the laser beam splitting unit to the light guide excitation area of the terahertz antenna module and receiving the laser reflected by the terahertz antenna module. The terahertz antenna module comprises a terahertz antenna chip, which is used for receiving and reflecting the laser focused by the laser converging unit, receiving the laser for generating or detecting a terahertz signal and reflecting the laser to the laser converging unit. An imaging unit receives the reflected laser and generates a projection image. The application enables an operator to observe and regulate the relative position of the terahertz antenna chip and the laser spot and the size of the laser spot in real time.