491results 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.

The invention provides a temperature-controlled shape memory alloy helical antenna capable of automatically unfolding and a control method, and belongs to the technical field of antennae, and the antenna comprises a helical radiation unit which is made of a shape memory alloy material and is of a multi-circle helical winding structure; the edge of the metal reflection unit is warped upwards to form an annular reflection cavity, and the metal reflection unit is used for enhancing the directivity and radiation gain of the spiral radiation unit; the supporting rod is of a multi-section coaxial nested structure, is vertically mounted in the center of the metal reflection unit and is used for providing stable axial support in the contraction and expansion process of the spiral radiation unit; the dielectric disc is mounted between the supporting rod and the spiral radiation unit; the metal via hole structure penetrates through the dielectric disc and is used for connecting a coaxial cable and the radiation structure to form a complete feed path; and the impedance matching arm structure is used for connecting the feed path and the spiral radiation unit and adjusting the impedance matching relation between the feed path and the spiral radiation unit so as to realize impedance continuity and radio frequency matching.

An antenna system for satellite applications is provide, the antenna system comprising an antenna array and a feed structure, and the antenna array is a passive antenna array configured to have a first state and a second state, the second state being a first deployed state. The feed structure is configured to provide a linearly polarized incident field for the antenna array in the first deployed state. The antenna array comprises a plurality of array elements, and the plurality of array elements forms a polarization conversion surface configured for converting the linearly polarized incident field to a reflected / transmitted circular polarized field. The antenna array is configured so that the radiation pattern of the reflected / transmitted circular polarized field corresponds to a predetermined radiation pattern and an array element geometry and an array element position of each of the plurality array elements are configured to provide the predetermined radiation pattern.

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 discloses a portable soft oscillator log-periodic antenna, and relates to the technical field of non-frequency-variable antennas. The portable soft oscillator log-periodic antenna comprises an antenna main rod, a folding supporting rod and a winding mechanism, the folding supporting rod is hinged to the antenna main rod, the folding supporting rod is connected with an edge suspension wire arranged at one end, away from the hinged end, of the antenna main rod, the winding mechanism is connected with the folding supporting rod, and the folding supporting rod is connected with the winding mechanism. The winding mechanism is provided with a tightening rope connected with the folding supporting rod, the tightening rope and the side suspension wire apply force rotating in different directions to the folding supporting rod, and the antenna main rod is provided with a soft vibrator connected with the side suspension wire. According to the portable soft oscillator log-periodic antenna, through folding design of the antenna structure, the size of the antenna in a non-working state is effectively reduced, the transportation and installation convenience of the antenna is remarkably improved, and the portable soft oscillator log-periodic antenna has the beneficial effects of being foldable and convenient to transport and install.

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.

Provide a robust antenna stand. 【Solution means】The antenna stand 40 has a metal detachable part 41 to which the antenna 1 is detachably attached, a metal opening / closing joint part 47 connected to the lower part of the detachable part 41, and three metal stand legs 50 radially extending from the opening / closing joint part 47. Each stand leg 50 opens and closes starting from the opening / closing joint part 47. By connecting the opened stand legs 50 to the legs 11 of the antenna pedestal 10, the antenna stand 40 is connected to the antenna pedestal 10.

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.

The present invention provides an antenna device in which the internal structure of the antenna related to the signal cable and power cable connected to the outside of a conventional antenna is provided separately from the antenna, thereby improving cooling efficiency, and the signal cable and power cable can be neatly organized on a support, allowing easy maintenance of the structure related to the signal cable and power cable without having to separate the antenna. [Solution] The antenna device according to the present invention includes an antenna, an antenna installation unit that installs the antenna on a support so that it is spaced a predetermined distance forward, and an optoelectronic composite unit that is disposed on the antenna installation unit and transmits and receives signals to the antenna and supplies power.

The present invention discloses a large-scale phased array antenna deployment and attitude adjustment mechanism suitable for high-orbit environment, including: an deployment locking mechanism, a deployment arm, a two-dimensional attitude adjustment mechanism, a compression release mechanism, an antenna frame and a connecting frame; wherein the deployment locking mechanism is fixed on the mounting surface by screws; one end of the deployment arm is connected to the rotating end of the deployment locking mechanism by screws, and the other end of the deployment arm is connected to the Y-axis fixed end of the two-dimensional attitude adjustment mechanism by screws; one end of the connecting frame is connected to the X-axis rotating end of the two-dimensional attitude adjustment mechanism by screws, and the other end of the connecting frame is connected to the antenna frame by screws; the phased array antenna is installed on the antenna frame by screws; there are five sets of compression release mechanisms, which are respectively installed on the Y-axis rotating end of the two-dimensional attitude adjustment mechanism and the four corners of the antenna frame symmetrical with the center of the phased array antenna. The present invention solves the difficult problems of installation and fixation, on-orbit deployment and two-dimensional attitude adjustment of large-scale phased array antennas.

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 invention provides an integrated low-power-consumption wireless data acquisition device, and relates to the technical field of wireless data acquisition, the integrated low-power-consumption wireless data acquisition device comprises a bottom plate, a box body is fixed at the top of the bottom plate, a collector and a wireless transmitter are arranged in the box body, and the collector and the wireless transmitter are respectively fixed at two sides of the bottom plate; a wireless transmitter is arranged in the box body, one end of the collector is connected with a detection line, the detection line penetrates out of the box body, a driving assembly is arranged between the collector and the wireless transmitter, the driving assembly comprises an insertion cylinder, the insertion cylinder is fixed to one side of the wireless transmitter, an insertion column is arranged at the position, corresponding to the insertion cylinder, of the outer side of the collector, and the insertion column is inserted into the insertion cylinder in a sliding mode. Compared with the prior art, the wireless transmitter can be started through the driving assembly, wireless data transmission is carried out, the wireless transmitter is in a power-off state when the wireless transmitter is not used, and therefore consumption of electric energy is avoided, the technical effect of low power consumption is achieved, and the electric quantity does not need to be maintained by frequently replacing a battery.

The present invention belongs to the field of communication technology, and in particular discloses a foldable intercom communication antenna. The foldable intercom communication antenna includes a mounting seat and an antenna, a connector is fixedly connected to one end of the top of the antenna, a wiring is connected between the connector and the mounting seat, a protective cover is fixedly sleeved on the outside of the mounting seat, a through slot for use with the connector is provided on one side of the protective cover, and the connector and the mounting seat are connected by a folding mechanism. The present invention is provided with a folding mechanism and a sealing mechanism, which can not only realize the folding of the antenna, reduce the overall volume of the intercom, and improve the portability of the intercom, but also can realize the protection of the connection between the antenna and the mounting seat and the wiring when the antenna is folded, so as to avoid the wiring and the connection being exposed to the outside, and the phenomenon of being damaged by bumps or water ingress, so that the foldable antenna can be applied to various harsh environments, and can effectively extend the service life of the foldable antenna and increase the scope of application of the foldable antenna.

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 present invention relates to the technical field of satellite antennas, and discloses a foldable satellite antenna structure, wherein a piston seat is disposed in a storage cylinder and is movable along the axial direction of the storage cylinder. A driving device is connected to the piston seat and drives the piston seat to move along the axial direction of the storage cylinder. A feed horn is disposed on top of the piston seat, a secondary reflector platform is slidably mounted on the feed horn, the secondary reflector is located above the feed horn, and is connected to the secondary reflector platform via a connecting bracket. The top end of a spring is connected to the bottom of the secondary reflector platform, and the bottom end of the spring is connected to the top of the piston seat. A plurality of foldable ribs are provided, the foldable ribs including a root rib and a top rib. The first end of the root rib is hinged to the side of the piston seat via a first hinge, and the second end of the root rib is hinged to the first end of the top rib via a second hinge. The first hinge and the second hinge are respectively provided with elastic components. The present invention has the characteristics of a small folded size, a large unfolded size, and a lightweight structure.

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.