359results about "Collapsable antennas means" patented technology

The embodiment of the invention provides an antenna, a spring bar assembly, a head particle assembly and wearable equipment. The antenna comprises a sleeve and an inner rod, and the inner rod is used for sliding in the sleeve to fold or unfold the antenna; the antenna further comprises an electric connection structure which is used for connecting the sleeve and the inner rod. The spring bar assembly comprises an operating piece, two spring bars and a second elastic piece; each spring bar comprises a connecting part and a spring bar stud which are connected, the second elastic piece is connected between the two connecting parts, the axes of the two spring bar studs and the center line of the second elastic piece are collinear, and the two connecting parts are symmetrical about the center line; and the operating piece is connected with the at least one connecting part and is used for driving the at least one spring bar stud to move along the direction of compressing the second elastic piece. According to the embodiment of the invention, the product performance can be improved, and the ever-increasing requirements of users are met.

The invention discloses a low-profile dual-circularly polarized wave beam scanning folding reflection array antenna. The low-profile dual-circularly polarized wave beam scanning folding reflective array antenna comprises a lower reflective array antenna and an upper circularly polarized selection metasurface. A circular polarization plane feed source is integrated in the middle of the reflective array antenna, and beam deflection is achieved. The circular polarization selection metasurface introduces opposite phase gradients to a left-hand circular polarization wave beam and a right-hand circular polarization wave beam through spin decoupling, and then introduces opposite wave beam deflection angles. Meanwhile, due to the polarization selection function of the circular polarization selection metasurface, the profile height of the antenna is half of the focal length of a traditional reflective array. By rotating the lower-layer reflective array antenna and the upper-layer circular polarization selection metasurface, the antenna can realize simultaneous + / -42-degree pitch angle scanning and 360-degree azimuth angle scanning of left-hand circular polarization and right-hand circular polarization dual beams, and the aperture efficiency, the axial ratio, the scanning loss and other performances are good. The low-profile dual-circularly-polarized wave beam scanning folding reflection array antenna provided by the invention can realize simultaneous scanning of two circularly-polarized wave beams, and is low in profile, compact in structure, low in cost and novel in function.

The utility model provides an umbrella-shaped antenna surface structure, which comprises a flexible antenna arc surface layer, a plurality of reinforcing layers and reinforcing ribs, the flexible antenna arc surface layer is an umbrella-shaped structure with a through hole in the middle, and the plurality of reinforcing layers are laid on the flexible antenna arc surface layer at intervals; and the plurality of reinforcing ribs are uniformly laid at intervals along the circumferential direction of the flexible antenna arc surface layer and are used for fixedly connecting the flexible antenna arc surface layer with the reinforcing layer. According to the utility model, the reinforcing layers are made of the toughened epoxy resin unidirectional carbon fiber prepreg, the placement direction is perpendicular to the reinforcing ribs, and the reinforcing layers are arranged at intervals, so that a reinforcing structure similar to a spider net structure is formed, and the arrangement of the reinforcing structure is beneficial to providing a strong supporting effect in the longitudinal and transverse directions when the antenna surface is unfolded; the overall stability when the flexible antenna surface is unfolded is maintained, the surface precision of the antenna surface is improved, the structural arrangement is reasonable and scientific, the weight of the antenna surface is light, and the surface precision is high.

The present invention makes it possible for element holders to be arranged so as to be positioned at predetermined intervals upon deployment.　This antenna device 1, which can assume a stored state in which the antenna device is stored in a housing and a deployed state in which the antenna device extends from the housing to the outside, comprises: an extension shaft member 20 stored in an axially retracted state inside the housing 10; a plurality of element holders 30 provided with openings and laminated in the housing 10 in a state in which the extension shaft member 20 is inserted in the openings; a deployable antenna element 40 held by the element holders 30; and a holding member for connecting the plurality of element holders 30 to each other.

A helix antenna and methods of making and using helix antenna to concurrently or independently radiate pulses in a very high frequency (VHF) band in a range of about 240 MHz to about 270 MHz and / or in an ultrahigh frequency (UHF) band in a range of about 360 MHz to about 380 MHz which can be useful in space to ground data transmissions, subsurface radar, and measurement of ice and snow pack.

The invention belongs to the technical field of communication, and particularly relates to a broadband, high-gain and circularly-polarized filtering folded transmission array antenna, which comprises a planar integrated feed source antenna, an SIW-Mini-SMP transition structure, a reflection type cross polarization converter RCPC and a transmission type metasurface TMMS capable of effectively generating circularly-polarized electromagnetic waves. The working frequency range of the antenna is 12.0 GHz to 18.3 GHz, the antenna covers the whole Ku wave band, the bandwidth is 41.6%, and the antenna has remarkable broadband characteristics; high gain is kept in the working frequency band, the peak gain is 22.64 dBic, and the advantage of high gain is shown.

The invention relates to the technical field of unmanned aerial vehicle interference, and provides an unmanned aerial vehicle communication link countering system based on a Vivaldi antenna, an antenna array, and the system comprises a signal receiving unit and a signal transmitting unit. Wherein the antenna array is formed by fixing at least two groups of Vivaldi antenna units which are arranged in a staggered manner in the extensible mechanical frame; the broadband interference component is used for responding to the spectrum signal of the to-be-suppressed unmanned aerial vehicle through a receiving unit and generating a first interference signal; wherein the interference frequency band corresponding to the first interference signal is the same as the real-time communication frequency band of the to-be-suppressed unmanned aerial vehicle, and the extensible mechanical frame is used for responding to the first interference signal and determining the number and angle of the expanded area arrays.

The utility model discloses a multimode personal search and rescue position indicating mark which comprises a shell, a main control module and a power supply are arranged in the shell, one end of the shell is provided with a VHF antenna which can be stretched and opened, and the other end of the shell is provided with a wireless communication module. A Beidou short message receiving and transmitting circuit, an AIS transmitting circuit, a VHF DSC transmitting circuit, a VHF voice transmitting circuit, a Beidou short message transmitting antenna, a Beidou short message receiving antenna, a positioning module and a positioning antenna are integrated on the main control module, and the VHF antenna and the power supply are electrically connected with the main control module. A plurality of modules are integrated on the main control module, various alarm means are used for alarming respectively, the probability that distress alarm is found in time can be greatly improved, search and rescue efficiency is improved, the VHF antenna can be stretched and extended when used, and the problems of the length and portability of the VHF antenna are solved.

The invention belongs to the technical field of wireless communication, and particularly relates to a broadband circular polarization folding transmission array antenna based on a transceiving unit. The antenna comprises a transmit-receive metasurface, a metal reflection surface and a circular polarization feed source. The transmit-receive metasurface provided by the invention is composed of a plurality of transmit-receive units which are arranged periodically; the circularly polarized feed source provided by the invention adopts SIW feed to excite circularly polarized waves, and the metal reflection surface is integrated on the upper substrate of the circularly polarized feed source. The transmit-receive unit provided by the invention has polarization selection and polarization torsion characteristics, can reflect a left-hand circularly polarized wave incident by a feed source, receives a right-hand circularly polarized electromagnetic wave incident by the feed source, transmits the left-hand circularly polarized wave, and forms a high-gain wave beam in a far-field region through phase compensation and polarization torsion. The antenna has the advantages of low profile (3 / F), circular polarization, high gain and wide bandwidth.

The application provides a high-precision flexible reflecting surface antenna device, which comprises a center body, an unfolding mechanism connected with the center body, an antenna arranged on the center body and a locking mechanism arranged below the center body and used for fixing the unfolding mechanism and the antenna. The high-precision flexible reflecting surface antenna device has the advantages of simple structure, small storage envelope, reliable unfolding process, high shape precision after unfolding and the like, and can meet the use requirements of Ka frequency band.

The invention discloses a self-inflating underwater buoy cabin released through electromagnetic control. The self-inflating underwater buoy cabin is characterized in that a locking and disengaging device is arranged in a floating bag cabin shell; in an initial state, the buoy is folded and placed in the shell of the floating bag cabin; the lower end of the buoy is in locking connection with the locking-disengaging device. And during separation and release, after the electromagnetic valve unlocks the buoy by the locking and releasing device, the buoy is ejected upwards by the locking and releasing device, and the buoy is automatically inflated to further float and unfold by utilizing the reduction of external water pressure. Compressed gas in the pressure bottle is injected into the floating bag by utilizing the actual process that the external pressure is gradually reduced when the buoy floats upwards, so that automatic inflation is realized, the size of the buoy is further reduced by adopting the flexible antenna, and finally, the miniaturization design of the whole buoy is realized.

The invention relates to an annular antenna microgravity simulation experiment device based on a magnetic suspension technology. The annular antenna microgravity simulation experiment device comprises a rack, a linear guide rail group, a magnetic suspension driving module, a suspension rope, an annular deployable antenna, a driving rope and an antenna driving module, the linear guide rail group is horizontally arranged above the rack, and the tail end of the linear guide rail group is fixedly connected with the top end of the rack; the magnetic suspension driving modules are respectively arranged at the lower parts of the linear guide rail groups; the bottom of the magnetic suspension driving module is connected with nodes of the annular deployable antenna through suspension ropes. And the antenna driving module is arranged at one end of the bottom of the rack. The device has the characteristics of high-precision microgravity environment simulation, a large-aperture annular deployable antenna structure, excellent synchronous following performance and no friction, and solves the problems that the friction force is large, the antenna node and the gravity compensation device cannot be synchronized in real time and the like when the conventional large-aperture annular antenna performs a gravity compensation experiment by using a suspension method.

The utility model relates to a vehicle-mounted antenna array mechanism which comprises a base, a rotary table base, an azimuth rotary table, a pitching support arm, an interference antenna array and a high-power transmitter. The base is suitable for being installed on the installation face of the tail of a carrier vehicle. And the turntable base is used for supporting the azimuth turntable and the pitching support arm. And the azimuth turntable is arranged on the turntable base and is fixedly connected with the turntable base. One end of the pitching support arm is connected with the azimuth turntable through a rotary support, and the pitching support arm can be adjusted in pitching relative to the azimuth turntable and can rotate in the horizontal direction. The pitching supporting arm is connected with the high-power transmitter, a lifting mechanism in a traditional scheme is omitted, and the number of components is greatly reduced. And the design complexity of the antenna array control system is obviously reduced. On the premise that the normal passing performance of the vehicle is met, the antenna array can be overturned backwards to be stored in the rear portion of the vehicle carrying compartment in the non-working state, the height of the antenna array is effectively reduced, the number of components and the complex structure are reduced, and the probability of failures is reduced.

The application discloses a high-unit-direction-pattern consistency base station antenna based on parasitic resonance decoupling and edge heterostructure, and belongs to the technical field of wireless communication and antennas. The antenna comprises a metal floor, a plurality of dual-polarization antenna units arranged in a periodic array, a parasitic resonance decoupling structure between adjacent units and an edge heterostructure. The dual-polarization antenna unit adopts a miniaturized four-folded dipole structure, the parasitic resonance decoupling structure is a C-shaped metal strip printed on a dielectric substrate, and the edge heterostructure comprises a three-section metal strip at the edge of the edge unit radiator and a C-shaped metal strip with a differential height at the outermost layer of the array. The application can offset the mutual coupling between units, improve port isolation, correct the direction pattern distortion caused by the array edge truncation, realize high consistency of the direction pattern of the whole array unit, has a simple structure and is easy to assemble, does not additionally increase the volume of the antenna, is suitable for large-scale MIMO base station arrays, and can effectively improve the beamforming robustness and system transmission performance.

A precision control method for a spliced curved-surface fixed-surface antenna comprises three steps of configuration design, precision design and precision realization for the spliced curved-surface fixed-surface antenna, especially an incomplete cylindrical-surface antenna, and comprises the steps of initial configuration design, curved-surface precision reference establishment, precision transfer function determination, and fine tuning and adaptation determination. The precision design comprises precision index distribution and precision index simulation analysis, and can solve the problems that a large space deployable curved surface structure is difficult in launching state folding layout, large in multi-surface pressing error, difficult in deploying precision and rigidity maintenance, poor in overall thermal stability of an antenna and the like, and the contradiction between high-precision pointing and large errors of initial installation and butt joint.

The utility model provides an intelligent device based on microwave detection, the intelligent device based on microwave detection comprises a mounting plate and an antenna, the mounting plate is provided with a metal surface formed on one surface of the mounting plate and is provided with an antenna port, the antenna is arranged in the antenna port, and an expansion reference ground can be formed by means of the metal surface. Therefore, the reference ground area of the antenna is expanded, and the occupied area of the antenna on the mounting plate can be reduced.

The present application relates to the technical field of unmanned aerial vehicle interference, and provides an unmanned aerial vehicle communication link countermeasure system based on a Vivaldi antenna, an antenna array including a signal receiving unit and a signal transmitting unit; wherein the antenna array is fixed in an expandable mechanical frame by at least two groups of staggered Vivaldi antenna units; a wideband interference component: for responding to the spectrum signal of the unmanned aerial vehicle to be suppressed through the receiving unit, and generating a first interference signal; wherein the interference frequency band corresponding to the first interference signal is the same as the real-time communication frequency band of the unmanned aerial vehicle to be suppressed, and the expandable mechanical frame is used for determining the number and angle of the unfolded surface array in response to the first interference signal.

The invention discloses a high-frequency-band and high-integration satellite-borne transmitting surface antenna, which belongs to the field of antennae, and comprises a supporting seat, a pitching pointing base is fixed on the side surface of the supporting seat, a horizontal pointing base is arranged on one side of the pitching pointing base, and a variable speed motor I is arranged on the side surface of the pitching pointing base; an output shaft of the first variable-speed motor penetrates through the side face of the pitching pointing base, the output shaft of the first variable-speed motor penetrates through the horizontal pointing base and is fixedly connected with the horizontal pointing base, a cabin plate is arranged on the side, close to the supporting base, of the horizontal pointing base, and a reflecting surface assembly is arranged on the cabin plate. A second variable-speed motor is arranged on the horizontal pointing base, an output shaft of the second variable-speed motor penetrates through the horizontal pointing base to be fixedly connected with the cabin plate, and a locking and releasing mechanism used for locking and releasing the reflecting surface assembly is arranged on the supporting base. The method has the effect of improving the assembly efficiency.

The invention relates to a reflector satellite (1) comprising at least one curved reflecting surface (11), characterized in that it comprises at least one support structure (10) connected to at least four positioning and orientation systems (12) of the reflector satellite for achieving attitude and orbit control, said positioning and orientation systems comprising at least one propulsion system, said positioning and orientation systems being synchronized and arranged so as to allow orientation of the reflector satellite along at least two axes of rotation. A satellite assembly comprising a source satellite and a reflector satellite is also described. Abstract figure: Figure 1

This utility model discloses an LTE antenna, relating to the field of antenna technology. It includes a circuit board (FPC); a radiating circuit formed on the front side of the circuit board through an etching process, comprising multiple frequency band resonant structures, including the LTE frequency band; a groove, the front portion of the circuit board excluding the frequency band resonant structures; a feed point, located on one end surface of the groove; a gap, located at the end of the circuit board near the feed point and extending to the middle of the circuit board; and an adhesive layer, located on the back side of the circuit board and covering the back side. The antenna is directly attached using the adhesive layer, eliminating the need for a traditional antenna bracket. Furthermore, the radiator's placement on the circuit board enhances the antenna's radiation directionality and improves radiation performance. The FPC substrate is ultra-thin and flexible, adapting to curved surfaces and significantly improving antenna integration efficiency and reliability. It is suitable for space-constrained scenarios such as IoT terminals and automotive devices.

The invention relates to a space flexible stretching device and system, and the device comprises a load assembly which comprises a flexible load and a load reel, and the load reel is used for winding the flexible load; the flexible stretching assembly is connected with the load assembly, the flexible stretching assembly comprises a stretching arm, a winding assembly, an unfolding and folding assembly and a driving assembly, the winding assembly is used for winding the stretching arm, and the unfolding and folding assembly is attached to the surface of the stretching arm; the driving assembly is configured to drive the unfolding and folding assembly to move so as to drive the stretching arm to be gradually unfolded and curled from a winding state to form a guide rod; the extension arm is connected with the flexible load, and the extension arm is used for driving the flexible load to move in the same direction; the two ends of the connecting rod assembly are connected with the two oppositely-arranged flexible stretching assemblies correspondingly. The multi-directional unfolding load requirement can be met, the universality, the lightweight degree and the unfolding and folding ratio are improved, and the structure is simple.

The telescopic antenna comprises a main body antenna and further comprises a plurality of auxiliary antennas surrounding the periphery of the main body antenna by a circle, the auxiliary antennas are hinged to the main body antenna so that the auxiliary antennas can be folded, the main body antenna is hollow, and the main body antenna is connected with a communication cable at the bottom of the main body antenna through an antenna connecting line. At least one first resonance coil is arranged on the antenna connecting line, a second resonance coil is arranged on the auxiliary antenna, the auxiliary antenna is connected with the communication cable through the second resonance coil, a base is arranged at the bottom of the main body antenna, an angle adjusting assembly is arranged on the base, the main body antenna is fixed on the angle adjusting assembly through the base, and a mounting bracket is arranged on the turntable assembly. Compared with the prior art, the size of the main body antenna can be reduced, the main body antenna is easy to store, the main body antenna can be installed through the base of which the angle can be adjusted in two directions, and the main body antenna can be adjusted according to use requirements.

The utility model provides an unmanned aerial vehicle ground cockpit, and relates to the field of unmanned aerial vehicle cockpits. The cockpit comprises a cabin body, a mounting base body is fixedly connected to the top of the cabin body, a display screen is fixedly connected to one side of the mounting base body, a displacement assembly connecting part is arranged on the other side of the mounting base body, and the displacement assembly connecting part is arranged on the back side of the display screen; the displacement adjusting assembly comprises a mounting base, a displacement driving device and a folding device, the displacement driving device is connected to the displacement assembly connecting part, the output end of the displacement driving device is in transmission connection with the mounting base, and an image transmission antenna connecting part is arranged on the mounting base and used for being connected with an image transmission antenna; data transmission antenna connecting parts are arranged on the two sides of the mounting base and used for being rotationally connected with a data transmission antenna, and the data transmission antenna connecting parts can be folded through a folding device. The cockpit can flexibly adjust the transmission positions of the data transmission antenna and the image transmission antenna according to the working environment.

A stereostructure spacecraft of the present invention comprises multiple deployable beam members, multiple tension members, and a spacecraft for storing the deployable beam members and the tension members. The stereostructure spacecraft is formed by deploying the deployable beam members and the tension members around the spacecraft. The deployable beam members stored in the spacecraft are deployed and arranged equidistantly in directions of multiple rotational symmetry axes, the rotational symmetry axes being rotational symmetry axes of a virtual polyhedron that is formed to have a substantial center of the spacecraft as an origin. The tension members support two end portions of two adjacent deployable beam members with tension. The respective end portions of the deployable beam members are simultaneously supported by three or more of the tension members.

The invention discloses a 5G communication equipment signal enhancement antenna folding structure which comprises a case, a sliding rail is fixedly connected in the upper side of the case, a sliding block is slidably connected in the sliding rail, a first rotating shaft is rotatably connected in the upper side of the sliding block, and a rotating disc is fixedly connected to the upper portion of the first rotating shaft. Two sets of rotating plates are fixedly connected to the upper side of the rotating disc, a second rotating shaft is rotatably connected between the rotating plates, a supporting plate is fixedly connected to the outer side of the second rotating shaft, a connecting block is fixedly connected to one side of the upper portion of the supporting plate, a lifting block is fixedly connected to the other side of the connecting block, and a connecting frame is slidably connected to the outer side of the lifting block; a connecting plate is fixedly connected to the other side of the connecting frame, four sets of rotating blocks are fixedly connected to the two sides of the upper side of the connecting plate, third rotating shafts are rotationally connected to the sides, facing each other, of the rotating blocks on the same side, antennas are fixedly connected to the sides, facing each other, of the third rotating shafts on the upper side and the lower side, and the carrying safety is improved.

The invention discloses a sliding type unfolding and unloading system for an offset-fed framework reflector. The sliding type unfolding and unloading system comprises a first offset angle adjusting device, a distributed self-tracking sliding device, a self-balancing height compensation device and a second offset angle adjusting device, the first offset angle adjusting device is located at the topmost end of the whole system and used for providing a fixed connecting point of the system and adjusting the deflection angle of the whole system. The upper surface of the distributed self-tracking sliding device is connected with the first offset angle adjusting device, and the lower surface of the distributed self-tracking sliding device is provided with a plurality of groups of guide rail sliding units for realizing self-tracking of the unfolding track of the offset-fed framework reflector; the self-balancing height compensation device comprises a plurality of groups of compensation units, one end of each group of compensation unit is connected with one guide rail sliding unit, and the other end of each group of compensation unit is connected with one unloading point on the offset-feed type framework reflector and is used for performing torque compensation on each unloading point of the offset-feed type framework reflector; according to the invention, mutual interference among unloading components in the folding and unfolding process of the reflector is effectively avoided, and orderly and stable unloading of the reflector is ensured.