103 results about "Terahertz antenna" patented technology

A system for coupling teraherz (THz) radiation to a coaxial waveguide comprises an antenna that generates THz radiation having a mode that matches the mode of the waveguide. The antenna may comprise a pair of concentric electrodes, at least one of which may be affixed to or formed by one end of the waveguide. The radiation may have wavelengths between approximately 30 μm and 3 mm. The waveguide may comprise an inner core and an outer wall defining an annular region. A terahertz sensor system may comprise a terahertz antenna comprising first and second concentric electrodes, means for generating a field across the trodes and means for triggering the emission of terahertz radiation, a first waveguide having first and second ends, said first end being coupled to said antenna so as to receive at least a portion of said terahertz radiation, and a sensor for detecting said terahertz radiation.

The invention discloses an inter-satellite terahertz communication system architecture which comprises a transmitter and a receiver which are arranged on a satellite platform. When a terahertz frequency range is a low frequency band smaller than 10THz, the transmitter adopts a huge-amount terahertz antenna array; when the terahertz frequency range is a high frequency band of 10THz to 30THz, the transmitter is a terahertz laser; when the terahertz frequency range is the low frequency band or the high frequency band, the receiver is a huge-amount terahertz antenna array; the huge-amount terahertz antenna array comprises 104 to 107 magnitude orders of antenna array elements; the huge-amount terahertz antenna array is made by a semiconductor process, and a plurality of antenna array elements working at different wavelengths are achieved by utilizing the same process, thereby achieving a multi-frequency MIMO (Multiple Input Multiple Output) system; and after the receiver receives a terahertz wave, information is extracted by a detection quantum device, and the same detection quantum device is driven by adopting a plurality of antenna array elements. The system architecture disclosed by the invention fuses the advantages of infrared laser communication and millimeter wave communication.

The invention provides a terahertz semi-active color focal plane camera which comprises an antenna feeder module, W terahertz irradiation source modules, a terahertz focal plane multichannel coherent receiving module, an intermediate frequency signal processing module and a local oscillator reference source, wherein the W is the number of pre-obtained colors, and the W is a natural number which is equal to or larger than 1. Each terahertz irradiation source module sends terahertz irradiation signals for irradiating on a detected target. Each terahertz irradiation source module comprises a terahertz irradiation signal frequency multiplier and a terahertz antenna. Local oscillator signals generated by the local oscillator reference source are subjected to frequency multiplication through the terahertz irradiation signal frequency multiplier, radiated by the terahertz antenna, and then, irradiates on the detected target. The camera in the invention is capable of improving target identification capability in a complex background environment, excellent in anti-disturbance performance, capable of real-time imaging, and has good resolution and sensitivity.

The invention discloses an antenna coupling Terahertz detector comprising a Terahertz antenna, a first semiconductor substrate, a second semiconductor substrate and a Terahertz detector for a semiconductor quantum well structure. The Terahertz antenna is arranged on an upper surface of the first semiconductor substrate, a lower surface of the first semiconductor substrate is connected with an upper surface of the second semiconductor substrate, and the Terahertz detector of the semiconductor quantum well structure is arranged on a bottom surface of the second semiconductor substrate. The Terahertz antenna is a light-sensitive surface of Terahertz light, incident Terahertz electromagnetic waves converge to a position where the Terahertz detector for the semiconductor quantum well structure locates under the action of the Terahertz antenna, and the Terahertz electromagnetic waves converted through the Terahertz antenna are received and analyzed by the Terahertz detector for the semiconductor quantum well structure. The Terahertz electromagnetic waves are converged through the Terahertz antenna, detection performance is improved, and operating temperature is increased. The antenna coupling Terahertz detector has simple production process.

An integrated antenna for transmitting or receiving radiation in a frequency range from 100 GHz to 3 THz, the antenna being characterized in that it comprises: a conductive ground plane (PM) deposited on a “top” surface (S) of a dielectric or semiconductor substrate (SB); a conductive ribbon (RC) extending above said ground plane (PM) and forming an angle (β) therewith, so as to form a radiating structure (SR) of the transverse electromagnetic wave horn type; and a planar waveguide (G) comprising at least first and second conductive strips (BS1, BS2) formed on said top surface of the substrate, and connected respectively to said conductive ribbon (RC) and to said conductive ground plane (PM). A terahertz transmitter and / or receiver including such an antenna and a device for generating and / or detecting a terahertz signal integrated on the same substrate (SB) as the antenna and connected thereto by said waveguide (G). A method of fabricating such an antenna and such a transmitter and / or receiver.

The invention discloses a terahertz medium-filled metallic channel waveguide. The terahertz medium-filled metallic channel waveguide structurally comprises a metallic channel and a medium filled in the channel. An electromagnetic wave is propagated along the longitudinal direction of the channel, the fundamental mode thereof is a transverse electric mode, the higher mode is a transverse magnetic mode, and the cut-off frequency is decided by the depth of the channel. The invention gives the characteristic equation of the propagation constant of the fundamental mode. The terahertz medium-filled metallic channel waveguide disclosed by the invention is simple in structure, low in loss, and easy to integrate. The invention enumerates various passive devices capable of being based on the waveguide structure. In particular, the terahertz medium-filled metallic channel waveguide disclosed by the invention is used as a series feed network for an antenna array, and capable of realizing a terahertz antenna array which is simple to feed, high in gain, with a planar structure, and easy to integrate. The terahertz medium-filled metallic channel waveguide disclosed by the invention is capable of being used for a terahertz high-speed wireless communication and radar system.

The invention provides a graphene terahertz antenna and a communication method thereof. The graphene terahertz antenna comprises a dielectric substrate and rectangular graphene patch antenna units arranged on the dielectric substrate, wherein the rectangular graphene patch antenna units are made of graphene materials, and both the length and the width of every rectangular graphene patch antenna unit are within a range of 1-100 micrometers; meanwhile, the rectangular graphene patch antenna units are provided with incident terahertz electromagnetic radiation.

The invention relates to a 6G radome suitable for a terahertz antenna and a preparation method thereof. The radome comprises an outer skin, a foam core layer, a middle skin, a foam core layer and an inner skin. The 6G radome is characterized in that the prepreg formed by combination of fiber reinforcement and resin is used as the skin material. As for the prpreg, the resin is polyphenylene ether modified bisphenol M cyanate ester resin and has the following dielectric properties: dielectric constant is less than or equal to 2. 6 and the loss factor is less than or equal to 0. 004. The fiber reinforcement is quartz fiber braid. The prepreg gum content is 30wt%-44wt%. The hot-pressing pot forming technology is used. The radome has high wave transmittance within the range of 100-200GHz and can meet the transmission performance requirements of the 6G antenna network within the terahertz band.

The invention relates to a washing machine and a non-washable object detection method and system for the washing machine. The detection method includes the steps that a terahertz signal generating andamplifying module is switched on; terahertz electromagnetic waves are emitted; a terahertz antenna element is switched on for propagation of terahertz signals; a washing machine motor is started to rotate for full-coverage terahertz scanning detection of clothes; a terahertz receiving module is switched on to receive reflected terahertz electromagnetic waves; the terahertz receiving module transmits received detection signals to an intelligent control center through a signal transmission cable; the intelligent control center performs imaging and judgment; if suspected non-washable objects exist, a voice alarm is given. According to the technical scheme for detecting non-washable objects, by utilizing the terahertz technology to perform full-coverage terahertz electromagnetic wave irradiation on the inner cavity of the washing machine, no-omission scanning of to-be-washed clothes is formed, non-washable objects in the clothes can be found in time, an alarm can be given, and imaging display can be performed so that a washer can dispose the non-washable objects to avoid loss.

The invention discloses a self-organized terahertz network-orientated auxiliary type directed communication method which comprises the following steps: a common node acquires own position information in a way of communicating with an anchor node all round; when needing to send data, a sending node avoids a distributed inter-frame spacing first, then starts to monitor an adopted low-frequency channel, and if the channel is occupied, avoids until the channel is empty; the sending node sends an extended request sending frame to a receiving node through a low-frequency all-round antenna, and the receiving node returns a clearing sending frame with the own position information and antenna information to the sending node; the two nodes carry out calculation to obtain a direction and a beam width of the antenna; the sending node sends a test frame to the receiving node through a directed terahertz antenna after waiting an antenna conversion time; after data sending is completed, the receiving node returns an ACK again; and if the sending node receives the ACK successfully, the whole sending process is completed. The invention further discloses network architecture for implementing the method.

The invention discloses a terahertz multi-carrier communication system. The system comprises a transmitter and a receiver. The transmitter comprises a transmitter terahertz antenna, a transmitter terahertz radio frequency front end, a transmitter intermediate frequency circuit and a transmitter baseband circuit. The receiver comprises a receiver terahertz antenna, a receiver terahertz radio frequency front end, a receiver intermediate frequency circuit and a receiver baseband circuit. The transmitter baseband circuit comprises N paths of DACs, and the receiver baseband circuit comprises N paths of ADCs, wherein N is a positive integer greater than or equal to 2. According to the invention, the front-end circuit part is improved, N paths of DAC signals are moved to different frequency bandsfor combining. According to the technical scheme of the invention, the Terahertz signal is combined and then the combined signal is moved to the Terahertz channel, namely, a multi-carrier mode is adopted, the spectrum resource of the Terahertz channel is utilized to the maximum extent, the communication rate is N times of that of a multi-carrier system under the condition of the same ADC samplingrate, and meanwhile, the use efficiency of the spectrum resource is greatly improved.

The invention discloses a system for high-speed scanning and imaging a security door channel with the terahertz. The purpose of the invention is to provide the system for imaging the security door channel with the terahertz, which has a simple structure, high stability and reliability, and strong resistance to external interference. The invention is realized by the following technical solution, inwhich at least two terahertz security checking devices are symmetrically opposite each other, and are fixed on the detection door frames of the entrance and the exit of the terahertz security door channel through a slot or a screw to form a terahertz security checking channel for the person to be checked (4) to come in and go out, thereby forming an active system for checking the security and imaging with the terahertz, the scanning area of which is greater than the height of the person. The technical solution comprises the steps of: the active system for checking the security and imaging with the terahertz using a terahertz antenna to emit milliwatt-level terahertz waves which can penetrate surface clothes of the person; the system measuring reflected terahertz signals to obtain a surface image of the person; the two terahertz security checking devices simultaneously scanning the front and the back of the person to be checked (4) with an method of interactive overlapping radiation detection of a synthetic aperture radar; and the two terahertz security checking devices transmitting the scan result to an external computer through cables for real-time imaging.

In a terahertz antenna module 1, a photoconductive antenna element 17 is fixed to a wiring board 9, and electrically connected to an electric signal input / output pin 24 of an electric signal input / output port 23 via a signal electrode of the wiring board 9. Further, a buffer member 7, a hemispherical lens 8, a photoconductive antenna element 17, and the wiring board 9 are disposed in a recess 3 of a container 2 in this order from an opening 6 side of the container 2, and by attaching a cover 25 to the container 2, the wiring board 9, the photoconductive antenna element 17, and the hemispherical lens 8 are pressed against the buffer member 7. Further, the wiring board 9 is positioned by the recess 4 and the hemispherical lens 8 is positioned by the buffer member 7 so that the optical axis OA of the hemispherical lens 8 passes just through a photoconductive antenna part of the photoconductive antenna element 17.

A terahertz detection device comprises at least one terahertz antenna, a detection microbridge suspended above a substrate comprising a resistive load coupled to the antenna and a resistive bolometric clement coupled to the resistive load, a bias circuit for biasing the bolometric element. The device further comprises a skimming microbridge suspended above the substrate, comprising a resistive bolometric element, and substantially identical to the detection microbridge, a reflective metal layer opposite to the skimming microbridge to obtain a destructive interference at the level of the skimming microbridge for a terahertz wavelength, a bias circuit to electrically bias the bolometric element of the skimming microbridge and a read circuit for measuring a difference between the electric signals of the microbridges.

The invention discloses a terahertz synchronous receiving and transmitting full-duplex communication system. The system comprises a terahertz antenna, a terahertz radio frequency front end, an intermediate frequency circuit and a baseband circuit, the terahertz radio frequency front end comprises a terahertz band-pass filter, a terahertz orthogonal mode coupler, a terahertz sub-harmonic mixer anda terahertz frequency doubling link, and transmission and receiving of terahertz signals are achieved in the same radio frequency front end through the terahertz orthogonal mode coupler. On the basisof realizing the functions of transmitting and receiving terahertz signals at the same time, the transmitting channel and the receiving channel only adopt one antenna, so that the size of the front end of the communication system is greatly reduced, and the miniaturization of the system is utilized.

An antenna arrangement for generating and receiving terahertz radiation is described. The arrangement comprises a substrate comprising a photoconductive material and a pair of electrodes provided on the photoconductive material. Each electrode includes a plurality of elongate fingers spaced apart from each other which are arranged in a parallel relation and define finger gaps therebetween. The fingers of one electrode are located within the finger gaps formed between the spaced apart fingers of another electrode so that two neighboring fingers belong to different electrodes. The fingers of each electrode have at least one protrusion extending away from lateral sides of the fingers within the finger gap. Each protrusion is slanted with respect to the corresponding finger direction, and directed towards a neighboring slanted protrusion extending from the neighboring finger such that end edges of the neighboring protrusions extending from the neighboring fingers approximately face one another, thereby defining a protrusion gap between end edges of the facing protrusions.

The invention discloses a reconfigurable Terahertz antenna based on a graphene-metal structure and a frequency modulation method. According to the antenna, a novel mixed graphene-metal structure radiating surface is adopted to improve a traditional pure metal antenna, and the mixed graphene-metal structure radiating surface comprises a graphene tuning part and a metal radiating body. According to the antenna, dynamic reconstruction can be carried out by changing the electric field bias of the graphene tuning part of the antenna radiating surface, and the antenna has a low reflection coefficient. In addition, due to the fact that the radiation patch of the antenna reserves a traditional metal material, the radiation performance of a traditional metal antenna is greatly balanced. The provided mixed graphene-metal reconfigurable antenna is expected to enable a gradient plane slot antenna to be used in a higher frequency band, and graphene brings more possibilities and an expansion space for a design and an application of the Terahertz antenna.

The invention discloses a system for realizing integration of terahertz tracking and data relay communication. The communication subsystem comprises a duplexer, a receiving subsystem and a transmitting subsystem, signals received by a terahertz antenna are restored into information signals through the duplexer and the receiving subsystem, or the information signals pass through the transmitting subsystem and the duplexer and are radiated to a free space through the terahertz antenna; the antenna and tracking and pointing subsystem captures, tracks and aims at the signals; and the auxiliary function subsystem receives an instruction for establishing a communication link and related parameters through the telemetering and remote control module, outputs the telemetering parameters, and switches the working modes of the terahertz communication terminal. According to the system, the integration of terahertz tracking and data relay communication is realized by utilizing the spatial transmission and high bandwidth characteristics of a terahertz waveband and combining a baseband high-speed modulation and demodulation technology, and the application requirements of tracking and data relay communication in near space anti-blackout communication and high-speed data transmission can be met.

The invention discloses a terahertz detector based on an N*M dielectric resonant antenna array. The N*M on-chip dielectric resonant terahertz antenna array is connected to a matching network, the matching network is connected to the source electrode of an NMOSFET, and the grid electrode of the NMOSFET is sequentially connected with a first bias resistor and first bias voltage. A third transmissionline is connected between the first bias resistor and the grid electrode. The drain electrode of the NMOSFET is connected to a first blocking capacitor. The other end of the first blocking capacitoris connected with a low noise pre-amplifier. A second bias resistor and a second bias voltage are connected between the first blocking capacitor and the low noise pre-amplifier. The low noise pre-amplifier is further provided with a voltage feedback loop. The invention also discloses a designing method of the N*M on-chip dielectric resonant terahertz antenna array. Compared with the prior art, loss of the on-chip terahertz antenna is effectively reduced and gain and radiation efficiency of the on-chip terahertz antenna are improved.

The invention relates to a 0.5THz corrugated horn antenna and a preparation method using an MEMS technology. The 0.5THz corrugated horn antenna and the preparation method using the MEMS technology are applicable to a terahertz-band imaging system or a short-distance terahertz communication system. The 0.5THz corrugated horn antenna comprises an expanded horn, V-shaped corrugated grooves, locating grooves and a step on the throat portion of the horn, wherein compared with a waveguide, the horn can improve radiation efficiency and rotation symmetry of a directional diagram; the V-shaped corrugated grooves are used for cutting off a surface current, the gain is effectively increased, and influence of metal structures around the 0.5THz corrugated horn antenna on the performance of the 0.5THz corrugated horn antenna can be reduced; the locating grooves can ensure accurate alignment when installation butt joint of the 0.5THz corrugated horn antenna is carried out; due to the step on the throat portion of the horn, the design freedom of the structure of the horn can be remarkably improved, influence of the alignment error between an upper layer silicon chip and a lower layer silicon chip on the performance of the 0.5THz corrugated horn antenna can be reduced, and the processing yield is improved. According to the thinking design, the 0.5THz corrugated horn terahertz antenna designed and obtained through the thinking is good in applicability, an array can be easily formed, and fixation and testing can be easily carried out. The 0.5THz corrugated horn antenna works within the 450GHz-530GHz frequency band, a standing wave of the 0.5THz corrugated horn antenna is lower than 1.6, the in-band gain is larger than 15dB, and the maximum gain can reach 16.6dB.

The invention relates to a transmit-receive Terahertz antenna which comprises a Terahertz radiation material and a multi-electrode antenna which is distributed in such a way that an annular shape is formed, the multi-electrode antenna consists of more than three metal electrodes that form an annular symmetric distribution structure, the multi-electrode antenna which is distributed in such a way that the annular shape is formed is positioned on an upper surface of the Terahertz radiation material and is parallel to a surface of the Terahertz radiation material, a central gap zone is formed via enclosure of the more than three metal electrodes, and an illumination zone is formed on the Terahertz radiation material and is positioned at the central gap zone. The invention also relates to a manufacturing method for the Terahertz antenna and a Terahertz measurement system. The antenna put forward in the invention can receive and transmit Terahertz radiation synchronously.

The invention relates to a transmission type electronic control terahertz antenna based on a liquid crystal material. The invention belongs to the technical field of microwave device engineering. A terahertz antenna comprises an upper dielectric plate, a metal patch, a metal ground, a middle liquid crystal layer, a bending line, a radiation patch and a lower dielectric plate. The metal patch and the metal ground are respectively etched on the upper surface and the lower surface of the upper layer dielectric plate, a gap structure is etched in the metal ground structure, the middle layer liquidcrystal is packaged between the upper layer dielectric plate and the lower layer dielectric plate, the bending line is processed on the upper surface of the lower layer dielectric plate, and the radiation patch is etched on the lower surface of the lower layer dielectric plate. Due to the fact that the incident wave and the reflected wave are located on the two sides of the array, the problem that the feed source horn antenna is shielded is effectively solved.

The invention relates to a multi-beam distribution power MAC protocol communication method, which combines 2.4 GHz and terahertz frequency band communication, controls information to be transmitted ina 2.4 GHz frequency band, and does not influence the stability of terahertz frequency band data transmission. By combining a distance-aware power distribution method with a multi-beam terahertz antenna design, the limited transmission power of a transceiver is fully utilized, and multiple-input-multiple-output terahertz communication is realized in a distributed network, and the power utilizationrate and the network throughput are maximized. Compared with a method for distributing transmission power according to needs, the multi-beam distribution power MAC protocol communication method solves the problem of excessive saving, and prevents idle power from being generated; and the throughput of the network is maximized while the limited transmission power of a single node is fully utilized.

The invention discloses a terahertz antenna robot near field three-in-one test system. The terahertz antenna robot near field three-in-one test system comprises a vector network analysis instrument, aterahertz vector network extension module, a terahertz standard antenna, a terahertz to-be-tested antenna, a robot, a test platform, test software and a main control computer; after the vector network instrument sends out a millimeter wave signal, the frequency doubling is amplified to a terahertz frequency band through the terahertz vector network extension module, and the terahertz signal passes through the terahertz to-be-tested antenna and is converted into electromagnetic wave with free space; after the electromagnetic wave is propagated by a certain distance, the electromagnetic wave isreceived by the terahertz standard antenna controlled by a six-axis robot mechanical arm and then is reduced into a current signal; the current signal passes through a low-loss cable and returns to the vector network analysis instrument; parameters are calculated by the vector network analysis instrument and are stored in the main control computer; and hereafter, the main control computer controls the six-axis robot mechanical arm to rotate to the next position, and the above action is repeated.

The invention discloses a symmetrical multi-slot terahertz 6G communication application frequency band antenna, and belongs to the field of terahertz antennas. The symmetrical multi-slot terahertz 6Gcommunication application frequency band antenna is characterized in that the main body part of the antenna is an insulating dielectric layer; a butterfly-like radiation patch and a circular patch combined with the butterfly-like radiation patch are arranged in the center of the upper surface of the dielectric layer; the butterfly-like radiation patch and the circular patch are used for feeding together; the circular patch is combined in the radiation patch, so that ultra-wideband effect is achieved; and semicircular grooves are symmetrically formed in the left end and the right end of the radiation patch towards the farthest end of the center of the radiation patch, two sets of four rectangular grooves with the same width are formed in the left end and the right end of the radiation patchtowards the center of the radiation patch, and finally a long vertical rectangular groove is formed in the central symmetry position of the butterfly-shaped radiation patch. According to the invention, the antenna can achieve an ultra-wideband effect, the designed frequency band is located to meet the terahertz frequency requirement, ultra-wideband work can be achieved, and the antenna can be widely applied to the terahertz 6G communication frequency band, and has the advantages of being simple in structure, reasonable in design, small in size and easy to manufacture.

The invention relates to a device and method for quickly adjusting the size of a terahertz time-domain spectroscopy measurement dead zone, and the device comprises a terahertz antenna, a first reflector, a second reflector, a third reflector, a main reflector, a first electric moving table, a second electric moving table, and an adjustment part. The first electric moving table and the second electric moving table are erected on the optical platform; The terahertz antenna is erected on the first electric moving table, the first reflector and the third reflector are erected on the two adjustingcomponents respectively, the two adjusting components are erected on the first electric moving table and the second electric moving table respectively, the second reflector is fixedly connected to theoptical platform on one side of the second electric moving table, and the main reflector is fixedly connected to the optical platform on the other side of the second electric moving table. The firstreflector moves to reflect the wave beam emitted by the terahertz antenna to the second reflector or the third reflector, and the second reflector and the third reflector reflect the wave beam to themain reflector. The selection flexibility of the target test size of the terahertz time-domain spectral scattering measurement system is improved.

The invention discloses an intelligent terahertz water preparation device which comprises a shell, a hollow support arranged in the shell and a cover plate covering the shell. The cover plate is provided with a water inlet pipe and a control switch used for controlling opening and closing of the water inlet pipe. A microporous filter plate is arranged in the shell and divides a closed space formed by tightly covering the shell with the cover plate into a pressurizing cavity and a water storage cavity; a control panel, a motor, an electromagnet and an inflator pump are arranged in the hollow support, the motor is connected with the electromagnet through a connecting shaft, and the inflator pump inputs gas to pressurize the pressurizing cavity; a terahertz antenna is fixedly arranged on the outer wall of the hollow support; an air pressure sensor, a first water level detector and a second water level detector are arranged on the side wall of the hollow support, the configuration of water molecular groups is reformed and arranged through the rotating electromagnet, water is automatically supplemented through the control switch, and by controlling the rotating speed and the magnetic force of the electromagnet, intelligent control over the preparation process through the control panel is achieved.