668results about "Collapsable antennas means" patented technology

A multi-band antenna has a feed point, a grounding location, a first portion for low band operation, a second portion for low band operation, and one or more portions for high band operation. The ground reference of the feed point for the multi-band antenna is connected to a separate object that may provide a base for the multi-band antenna. The feed point of the multi-band antenna may be spaced above the base and have a space between the feed point and a location for the ground point. The low band portion has multiple resonances that are often odd multiples of the lowest resonant response. The portions that resonant most dominantly in the high band often have multiple resonances that are even multiples of the lowest high band resonance. The multi-band antenna has resonances spaced closely enough to appear to be a wide band antenna above the fundamental high band resonance.

Embodiments of the present invention provides an antenna and an antenna system. The antenna includes a body member, a head member integrally connected to a first edge of the body member, wherein the head member forms a fold having a first angle towards the front face of the body member, and a first arm member and a second arm member, wherein the first arm member and the second arm member are integrally connected to the body member corresponding to the second edge and the third edge of the body member, and wherein the set of arm members each form a fold having a second angle towards the front face of the body member.

The invention discloses a radiation-receiving type low-profile dual-beam array antenna and a folding decoupling design method. The low-profile dual-beam array antenna is composed of a transmission metasurface, a polarization conversion metasurface and a horn feed source. The transmission metasurface is formed by periodically extending and arranging m * m radiation-receiving units in a plane at equal intervals, and efficient transmission and spin decoupling focusing phase regulation and control of electromagnetic waves of a specific frequency band are achieved. The radiation-receiving unit is composed of three layers of metal and two layers of dielectric plates. The polarization conversion metasurface is formed by periodically extending and arranging n * n polarization conversion units in a plane at equal intervals, and efficient reflection, polarization conversion and wave beam non-mirror image deflection phase regulation and control of electromagnetic waves of a specific frequency band are achieved. The polarization conversion unit is composed of two layers of metal and a layer of dielectric plate. The low-profile dual-beam array antenna provided by the invention can generate two independently regulated orthogonal circularly polarized waves through spin decoupling under the excitation of a circularly polarized wave feed source, and has the remarkable advantages of high aperture efficiency, low profile and the like.

The present invention proposes a controllably deployable large-area phased array solar wing integrated antenna, which belongs to the technical field of space product structure and mechanism design, and aims to realize the real-time adjustment capability of the phased array antenna on orbit, improve the deployment flatness of the phased array antenna, reduce the locking impact, and integrate the phased array antenna with the solar wing. The integrated antenna includes a plurality of deployment plate assemblies, a high-precision damping hinge mechanism, a locking device, a timing control expander and a deployment position detection system; each deployment plate assembly is connected by a high-precision damping hinge mechanism; the timing control expander is used to control the deployment timing between each deployment plate, and is also used to press adjacent deployment plates and control the locking device to complete the locking between each deployment plate; the deployment position detection system is used to detect the positional relationship between adjacent deployment plates, and control the high-precision damping hinge mechanism according to feedback data until it reaches a predetermined position. Suitable for large-area deployment mechanisms of phased array antennas.

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.

An antenna assembly has a solar layer having one or more solar cells generating solar power, an antenna layer connected to the solar layer and having electronic components utilizing the solar power generated by the solar layer, and a thermal dissipation device dissipating heat locally at the antenna assembly. A large number of antenna assemblies are connected to form an antenna array in which heat is generated locally at each antenna assembly and dissipated locally at each antenna assembly.

The utility model relates to the technical field of electric power emergency communication, in particular to a portable electric power emergency communication transmission device. According to the technical scheme, the device comprises a storage box, a signal transmission mechanism and a lifting seat, a rotating disc is rotationally installed at the top in the lifting seat, a gear ring is fixedly installed at the bottom of the outer side of the rotating disc, a fluted disc is installed on one side of the gear ring in a meshed mode, a servo motor is fixedly installed at the top of the fluted disc, and the signal transmission mechanism is fixedly installed at the top of the rotating disc. According to the utility model, the servo motor is electrified to operate, the fluted disc is matched with the meshed gear ring to drive the turntable to rotate, the rotating turntable can adjust the signal receiving direction of the signal transmission mechanism, and meanwhile, the signal transmission mechanism transmits a received electric signal to the signal detector for calculation; and the direction of the signal transmission mechanism is adjusted according to the signal intensity calculated by the signal detector, so that the function of automatically adjusting the signal transmission mechanism to receive the signal at the maximum intensity is realized, and the stability of signal receiving is ensured.

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 discloses an anti-interference ultra-wideband radiation unit and an anti-interference ultra-wideband antenna, and the radiation unit comprises a light guide sheet which is located above a radiation surface and is used for expanding the bandwidth; the radiating surface consists of four folded dipole radiating arms and is printed on a first substrate of which the dielectric constant is 4.4, the loss tangent is 0.005 and the thickness is 0.762 mm, and every two folded dipole radiating arms are connected together through a high-impedance lead; the balun comprises an inductance circuit and a capacitance circuit on the front surface and the back surface, the inductance circuit is arranged in a bending manner and is electrically conducted through a metalized via hole, the capacitance circuit performs energy coupling through a gap of the substrate thickness to form a gap capacitor, and the balun is connected with each folded dipole radiation arm and is used for providing broadband impedance matching; and the base is connected with the balun and is used for converting the feed type, so that the coaxial cable is welded in parallel to the base, the electromagnetic interference between different frequency bands can be effectively reduced, and the gain can be improved.

An antenna array has a plurality of square or rectangular antenna assemblies. Each assembly includes a first antenna assembly surface with a solar cell and a second antenna assembly with one or more antenna elements. The antenna assemblies are interconnected without gaps therebetween to form a first contiguous array surface comprised of the first antenna assembly surfaces and a second contiguous array surface comprised of the second antenna assembly surfaces. The antenna assemblies are connected together by mechanically stored-energy connectors, such as spring tape, that self-deploy the array in space without the use of electric energy.

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.

The invention relates to a storable portable unmanned aerial vehicle detection device and a use method, and belongs to the technical field of unmanned aerial vehicle detection signal transmission. Comprising a folding antenna assembly and a backpack assembly provided with the folding antenna assembly, and the folding antenna assembly comprises a supporting rod, a plurality of direction-finding antennas and an omnidirectional detection antenna. A bent part is arranged on the supporting rod, one end of the bent part is connected with the backpack assembly, the other end of the bent part is connected with the supporting rod, and the bent part is used for containing the supporting rod; the omnidirectional detection antenna is fixedly mounted at one end, far away from the bending part, of the supporting rod; the plurality of direction-finding antennas are detachably installed on the supporting rod and are distributed on the peripheral side of the omnidirectional detection antenna. The objective of the invention is to solve the technical problems that handheld detection or backpack detection equipment in the prior art cannot rapidly give out azimuth information of an unmanned aerial vehicle, needs carrier rotation for direction finding, and is high in use requirement and poor in precision.

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.

The invention belongs to the technical field of spacecraft unfolding mechanisms, and discloses an unfolding mechanism locking device which comprises a first hinge structure, a second hinge structure and a self-locking assembly. The first hinge structure and the second hinge structure are connected in a relatively rotatable mode and are connected to the two deployable parts of the deployable mechanism respectively. The self-locking assembly comprises a locking seat and a locking pin, the locking seat is arranged on the first hinge structure, and the locking pin is arranged on the second hinge structure in a floatable mode. In the process that the second hinge structure rotates from the moving state to the locking state relative to the first hinge structure, the locking pin abuts against the locking base and moves along the locking base. And after the second hinge structure rotates to a locking state relative to the first hinge structure, the locking pin extends into and is locked in the locking seat. According to the unfolding mechanism locking device, the structure can be simplified, and high-rigidity and efficient locking can be provided for the two unfolding parts of the unfolding mechanism.

The invention discloses a paper folding reflective array antenna block layout method. The problem that in the prior art, periodic, symmetric and regular distribution characteristics of reflective array units are not matched with non-periodicity, asymmetry and irregularity of paper folding structures is solved. The method comprises the following steps: completing preparation work before layout, and sequentially carrying out independent layout design on each panel in a paper folding reflective array; the independent layout design of the panel comprises the following steps: generating an initial layout, determining a unit type according to the initial layout, deleting an out-board unit, and retaining an in-board unit; for the intersection units, a layout design model is established, the optimization variable is the center position offset of the intersection units, the constraint condition is that the offset intersection units do not intersect with the creases and the adjacent units, and minimization of the sum of squares of the offset of all the intersection units is taken as an optimization target; the method compensates the phase of the electromagnetic wave reaching the edge of the panel while avoiding the crease, and reduces the negative influence of the crease on the electromagnetic performance of the antenna.

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 provides a satellite configuration loaded with a deployable antenna and a satellite. The satellite configuration loaded with the deployable antenna comprises a platform cabin, a load cabin truss, the deployable antenna, a solar array, a data transmission antenna and a star sensor, the platform cabin is connected with the load cabin truss, and the solar array and the deployable antenna are installed on the two sides, in the same direction, of the platform cabin and the load cabin truss respectively. A data transmission antenna is installed on one side face, located between the solar arrays on the two sides, of the platform cabin, and the star sensor is installed on the load cabin truss. The unfolding direction of the deployable antenna is perpendicular to the longitudinal direction of the load cabin truss, that is, the longitudinal direction of the deployable antenna is parallel to the longitudinal direction of the satellite, the longitudinal size of the deployable antenna can be greatly increased, and therefore the deployable antenna can adapt to installation of a large-area deployable antenna in a one-dimensional folding and unfolding mode.

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 provides a cross coupling microstrip filtering oscillator antenna and an array thereof, and belongs to the field of large phased array radar systems.The cross coupling microstrip filtering oscillator antenna comprises an antenna feed port, a reflecting plate, a suspended cross coupling microstrip circuit board, a filter cover plate and metal oscillator arms, the filter cover plate is located on the upper surface of the reflecting plate, and a suspended air cavity is defined by the filter cover plate and the reflecting plate; the suspended cross-coupled microstrip circuit board is located in the suspended air cavity, an inner conductor of the antenna feed port extends into the suspended air cavity to be connected with the suspended cross-coupled microstrip circuit board, an outer conductor of the antenna feed port is connected with the reflecting plate, and the metal oscillator arm is located on the filter cover plate. One radiation arm in the metal oscillator arms is connected with the suspended cross-coupled microstrip circuit board, and the other radiation arm is grounded; the radiation characteristic is directly realized on the filter cover plate, and a wider working bandwidth is realized under the conditions that the lower sideband of the suspended broadband high-pass filter is high in suppression, the original filtering performance of the filter is not changed and the profile height is basically kept, so that the problem of interference of an auxiliary radar on a main radar is 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.