16results about "Collapsible/retractable loop antennas" patented technology

A retrofittable enclosure for storing a deployable antenna 120 on the outer surface of an underwater vessel 160 (e.g submarine, AUV), the retrofittable enclosure comprising: a protective housing 110 f

An antenna for charging and measurement may comprise: a telescopic support installed at a lower portion of an aerial vehicle and configured to contract when the aerial vehicle lands on a wireless station and extend when the aerial vehicle takes off from the wireless station; and an antenna coil part deformed into a spiral shape when the telescopic support is contracted so that the wireless station receives wireless power and deformed into a conical shape when the telescopic support is extended to measure a radio signal.

An interrogation and detection system for detection of surgical implements within a patient's body, the system including One or more RFID tags affixed to a surgical implement within the patient's body. Each RFID tag being configured to transmit a return signal when energized, and a remote signal generator configured to generate an energizing signal for the one or more RFID tags. The signal generator operably coupled to the in-vivo introducible antenna via a communication cable. The system further includes an in-vivo introducible antenna configured to be inserted through a trocar-cannula assembly into a surgical site within the patient's body. Wherein the tubular channel defines a shape having a dimension "D1", such that the dimension "D1" of the tubular channel is less than the dimension "D2" of the in-vivo introducible antenna.

The invention relates to a hand-held device for detecting electrostatic discharges, comprising an evaluation unit and a cable antenna (1; the invention relates to a cable antenna (1, 1 '), the cable antenna being formed in a coil-like manner with a number n of windings (2, 2'), where n > = 2, each winding (2, 2 ') being wound about a winding axis, each winding having a diameter of less than 30 cm, and the windings of the cable antenna being preferably spaced apart from one another by at least one spacer.

The application discloses a high-orbit LS dual-frequency full-polarization SAR system based on a ring-shaped reflector antenna, which comprises a dual-frequency radar central control processor, an LS dual-frequency common-aperture full-polarization feed array, a ring-shaped antenna reflector, an L-band full-polarization receiver and an S-band full-polarization receiver. The application has L and S dual-frequency bands and full-polarization ground imaging capability, and dual-frequency band data can be used for ionosphere measurement and ground surface deformation monitoring, thereby improving the application efficiency and competitiveness of the high-orbit SAR system.

The present invention relates to an in-vivo introducible antenna for detecting RF tags and provides an interrogation and detection system for detecting surgical instruments within a patient's body, the system comprising: one or more RFID tags attached to surgical instruments within the patient's body. Each RFID tag is configured to emit a return signal upon energization, and a remote signal generator is configured to generate an energization signal for the one or more RFID tags. The signal generator is operably coupled to an in-vivo introducible antenna via a communication cable. The system further comprises an in-vivo introducible antenna configured to be inserted into a surgical site within the patient's body through a trocar-cannula assembly. Wherein the tubular channel defines a shape having a dimension "D1" such that the dimension "D1" of the tubular channel is less than a dimension "D2" of the in-vivo introducible antenna.

The application discloses a high folding and unfolding ratio annular reflector antenna folding and unfolding mechanism, which comprises an annular scissor mechanism, a center unfolding and folding mechanism, a radial support rod, an annular slide rail and a driving rope. One end of the radial support rod is connected with a base of the center unfolding and folding mechanism, and the other end is connected with the annular scissor mechanism. The radial support rod is first stretched and locked. One end of the driving rope is fixed with the annular scissor mechanism, and the other end is fixed with the annular slide rail. The annular slide rail is fixed with the center unfolding and folding mechanism. The center unfolding and folding mechanism is unfolded, and the driving rope is pulled. Under the action of the driving rope, the annular scissor mechanism can be unfolded from one piece to a larger area. The high folding and unfolding ratio rigid annular reflector antenna folding and unfolding mechanism can ensure that the antenna reflector has a larger area after being unfolded and has a smaller volume when being folded.

The present invention is directed to a handheld device for the detection of electrostatic discharge, comprising an evaluation unit, and a cable antenna, wherein the cable antenna is formed in a coil-like manner with a number n of windings, with n≥2, each winding being wound around a winding axis, a diameter of each winding is less than 30 cm, and the windings of the cable antenna are spaced apart from each other, preferably by means of at least one spacer.

The present invention is directed to a handheld device for the detection of electrostatic discharge, comprising an evaluation unit, and a cable antenna (1,1') made of coaxial cable, wherein the cable antenna is formed in a coil-like manner with a number n of windings (2, 2'), with n >_ 2, each winding (2, 2') being wound around a winding axis, a diameter of each winding is less than 30 cm, and the windings of the cable antenna are spaced apart from each other, preferably by means of at least one spacer.

The present invention discloses a flexible and elastic near-field communication antenna, comprising an antenna coil, wherein the antenna coil is formed by spirally winding a wire on the same plane, and two adjacent turns of wire are arranged at intervals, and the wire is formed by connecting a plurality of circular arcs connected end to end, and the number of circular arcs on the two adjacent turns of wire is the same, and the curvature of the circular arcs is the same. The present invention also discloses a method for preparing the flexible and elastic near-field communication antenna. Compared with the prior art, the flexible and elastic near-field communication antenna of the present invention adopts a specific structure with excellent resilience, and has good anti-deformation ability. It can still work normally after being subjected to arbitrarily bending, twisting, folding, curling, and extrusion.

A communication device, method and computer program product enable satellite communication via a patch antenna incorporated into an extendable display device. A flexible display support structure moveably attached to and positionable on a base housing between retracted and extended positions. One of the flexible display support structure and the base housing has an antenna surface that is covered by the other one while the flexible display support structure is retracted and uncovered while extended. A flexible display is coupled across a front side of the base housing and the flexible display support structure to present a larger portion while extended and a smaller portion while retracted. A patch antenna is positioned on the antenna surface. The patch antenna includes a ground plane, a substrate comprising a low dielectric constant and low loss material and positioned on the ground plane, and a conductive radiator patch positioned on the substrate.

The invention belongs to the technical field of satellite-borne deployable antennas, and particularly relates to an annular deployable antenna based on a multistage parallel shear fork mechanism. According to the technical scheme, the annular deployable antenna based on the multistage parallel shear fork mechanism comprises a plurality of truss shear fork mechanism units, unit connecting components and a rope driving system, and every two adjacent truss shear fork mechanism units are connected together through two unit connecting components; the plurality of truss shear fork mechanism units are connected in parallel to form the linkage type annular deployable antenna, and the rope driving system is used for providing power for the annular deployable antenna from a folded state to an unfolded state. According to the annular deployable antenna based on the multi-stage parallel shear fork mechanism, a parallel mechanical transmission path is formed in the unfolding process of the multi-stage shear fork mechanism and used for dispersing loads, improving the rigidity and stability of the whole truss and avoiding the risk of single-point failure, and uniform transmission of driving force on the two sides is ensured through a parallel driving path; the structure is simple, stability is high, and overall structural rigidity is large.

The present invention relates to a handheld device for detecting electrostatic discharge, comprising an evaluation unit and a cable antenna (1;1') made from a coaxial cable, wherein the cable antenna is formed in a coil shape having n windings (2;2') with n≧2, each winding (2;2') is wound around a winding axis, each winding has a diameter of less than 30 cm, and the windings of the cable antenna are preferably separated from each other by at least one spacer.

A collapsible detection antenna to detect electromagnetic tags of surgical articles in an operating room includes an antenna assembly configured to detect the electromagnetic tags. The antenna assembly is configured to move between a deployed configuration and a collapsed configuration. In the deployed configuration, the antenna assembly forms an antenna loop configured to detect the electromagnetic tags. The antenna assembly has a greater detection range in the deployed configuration than in the collapsed configuration. The deployed configuration corresponds to a tuned shape of the antenna assembly sufficient to detect the electromagnetic tags in the deployed configuration.

To provide a multi-loop antenna that is excellent in portability and can adjust a resonance frequency by an element other than an antenna wire material, and a loop antenna type unpowered radio.SOLUTION: A conductive antenna wire material is inserted in a loop tube in a state of being wound for multiple times. In the tube, separately from the antenna wire material, a conductive, dielectric, or insulative solid, a granular material, a wire, a liquid, gel, or a gas (except normal temperature ordinary humidity air) are filled or installed. Then the above problems are solved.SELECTED DRAWING: Figure 1