13 results about "Biconical antenna" patented technology

The invention discloses a biconical antenna balun equivalent circuit modeling optimization method based on a multi-conductor transmission line, and belongs to the technical field of electromagnetic simulation. The method comprises the following steps: firstly, establishing a three-dimensional electromagnetic model of a biconical antenna balun based on a finite element method, and setting ports and defining boundary conditions in combination with an actual current transmission path; then, distribution parameters among conductors are extracted through a multi-conductor transmission line theory, and a Balun circuit topological structure is constructed; and finally, taking the antenna coefficient as an optimization target, carrying out iterative optimization on equivalent circuit element parameters by adopting a multi-target genetic algorithm, considering a plurality of optimization targets in a broadband range, and finally obtaining a high-precision equivalent circuit model. Through combination of electromagnetic simulation and an intelligent optimization algorithm, high-efficiency extraction of complex Balun structure distribution parameters and adaptive optimization of circuit parameters are realized, and the simulation precision of the biconical antenna is remarkably improved.

The utility model discloses a vehicle-mounted biconical antenna, and relates to the technical field of biconical antennas, in particular to a vehicle-mounted biconical antenna. The antenna comprises an upper cone, a lower cone, a coaxial cable, an upper cone crimping plate and a lower cone crimping plate, the upper cone and the lower cone are connected through a cone connecting piece, the coaxial cable is arranged in the lower cone and penetrates through the upper cone and the lower cone, and the coaxial cable comprises an inner conductor, an outer conductor and an insulating medium between the inner conductor and the outer conductor. The inner conductor is conductively connected with the upper cone through an inner conductor conductive flange, and the outer conductor is conductively connected with the lower cone through an outer conductor conductive flange; the upper cone crimping plate and the lower cone crimping plate are respectively used for fixing the inner conductor conductive flange and the outer conductor conductive flange on the upper cone and the lower cone; according to the utility model, the coaxial cable feeds downwards from the lower cone, so that the problems of eccentric torque and wind load additional couple caused by a traditional supporting rod suspension structure are avoided, and the structural stability and the mechanical property of the antenna are remarkably improved.

An apparatus comprising a biconical antenna for generating an omnidirectional beam pattern is presented. A reflector reflects the omnidirectional beam pattern from the biconical antenna into a predetermined beamform. The reflector comprises a ground plane connected to the biconical antenna and a parabolic reflector extending from the ground plane at a predetermined angle. A curvature of the parabolic reflector reflects the omnidirectional beam pattern into the predetermined beam form. The predetermined angle corrects for beam shift of the predetermined beam form caused by the ground plane.

A biconical antenna includes a dielectric corset having a first conical chamber defined therein and a second conical chamber defined therein opposite the first conical chamber. The dielectric corset further defines a passage from the second conical chamber to the first conical chamber. A first conical radiating structure is bonded within the first conical chamber of the dielectric corset. A second conical radiating structure is bonded within the second conical chamber of the dielectric corset. An SMA connector is connected to the second conical radiating structure and has a metal pin extending through the passage to electrically contact the first conical radiating structure and provide RF signals thereto.

The invention relates to a test system (54) for electromagnetic compatibility testing. The test system (54) comprises an anechoic chamber (56) and a biconical antenna assembly (10). The biconical antenna assembly (10) has an antenna feed point (12), a first antenna structure (14) and a second antenna structure (16). The first antenna structure (14) and the second antenna structure (16) extend from the antenna feed point (12) towards opposite directions. The biconical antenna assembly (10) comprises a first additional capacitive structure (28) that is attached to the first antenna structure (14) and a second additional capacitive structure (30) that is attached to the second antenna structure (16). The anechoic chamber (56) has a floor (58). An electromagnetic layer (60) made from a material with high dielectric properties is provided between the biconical antenna assembly (10) and the floor (58). The electromagnetic layer (60) has lower electrically conducting properties in comparison to the floor (58) of the anechoic chamber (56).

This utility model relates to the field of antenna protective covers, specifically to a lightweight multi-band antenna protective cover structure, including a multi-band antenna body, an upper conical protective cover, a lower conical protective cover, a mounting base, and a biconical antenna. Biconical antennas are installed on the left and right sides of the multi-band antenna body. The upper conical protective cover is provided at the upper end of the biconical antenna, and the lower conical protective cover is provided at the lower end of the biconical antenna. The upper conical protective cover is mounted on the mounting base, and the lower conical protective cover can be disassembled and installed on the upper conical protective cover.

The invention discloses a high-gain miniaturized biconical antenna based on a rectangular dielectric prism, which belongs to the technical field of radar antennae and structurally comprises a dielectric prism, a biconical antenna upper radiation arm, a biconical antenna lower radiation arm and a metal circular truncated cone positioned on one side, close to the biconical antenna lower radiation arm, of the biconical antenna upper radiation arm, the metal cylinder is positioned between the biconical antenna lower radiation arm and the metal circular truncated cone; the metal connecting rod is positioned in the biconical antenna lower radiation arm and is connected with the metal cylinder; according to the high-gain miniaturized biconical antenna based on the rectangular medium prism, the defect that the size is too large due to the fact that a metal reflecting plate is adopted by an existing biconical antenna can be avoided, miniaturization can be achieved, the gain of the biconical antenna can be improved, and the high-gain miniaturized biconical antenna can be widely applied to radar antennas and has good application prospects.

The present invention discloses a broadband omnidirectional antenna unit and a broadband omnidirectional high-gain antenna. A broadband omnidirectional antenna unit is composed of a supporting structure, a radiating structure, a choke, and a passive coupling structure. A channel for the antenna feeding coaxial line is provided in the middle of the supporting structure; the radiating structure is composed of an upper radiating arm, a lower radiating arm, and a short-circuit block. The upper radiating arm and the lower radiating arm are in the form of a biconical antenna, and the short-circuit block is a fan-ring cylindrical structure and is eccentrically arranged; the passive coupling structure is directly above the radiating structure. The broadband omnidirectional high-gain antenna of the present invention is composed of four broadband omnidirectional antenna units, and there is a 90° orientation angle difference between two adjacent broadband omnidirectional antenna units around the antenna axis. Simulation results show that the present invention has the advantages of simple feeding, higher gain, and wider bandwidth.

The utility model relates to the technical field of electromagnetic interference detection, in particular to a detection device for electromagnetic shielding, which comprises a box body, one side of the box body is rotatably connected with a box door through a hinge, any inner wall of the box body is fixedly connected with a main wave absorbing plate, one side of the box door is fixedly connected with an auxiliary wave absorbing plate, the box door is provided with a shielding mechanism in a matched manner, and the shielding mechanism is provided with a shielding mechanism. The shielding mechanism is provided with a fastening mechanism in a matched mode. According to the utility model, the biconical antenna and the equipment are placed in the box body, the box door is closed to enable the sponge frame to be sleeved on the sleeve frame, and the line connected with the equipment and the biconical antenna passes through the L-shaped groove and the threading hole on the baffle plate and then is electrified, so that the gap between the box body and the box door and the gap between the jack and the line are blocked by the wave-absorbing material; the influence of external electromagnetic waves on equipment in the box body is reduced, meanwhile, the situation that radiation in the box body leaks to the outside is reduced, and the box can be repeatedly used and is convenient for users to use.

An apparatus comprising a biconical antenna 202 for generating an omnidirectional beam pattern is presented. A reflector 210 reflects the omnidirectional beam pattern from the biconical antenna into a predetermined beamform. The reflector 204 comprises a ground plane 208 connected to the biconical antenna 202 and a parabolic reflector 210 extending from the ground plane at a predetermined angle. A curvature of the parabolic reflector 210 reflects the omnidirectional beam pattern into the predetermined beam form. The predetermined angle corrects for beam shift of the predetermined beam form caused by the ground plane 208.

The invention discloses an angle adjusting device and method for a biconical antenna, and belongs to the technical field of antenna adjusting.The angle adjusting device comprises a base, a horizontal plane rotating mechanism, a vertical plane rotating mechanism, a detection unit and a regulation and control unit, and the vertical plane rotating mechanism comprises a vertical plane rotating assembly and an extrusion positioning assembly; performing high-grade wear and low-grade wear evaluation on the wear according to the detected rotating wear, and performing wear adjustment on the vertical surface rotating assembly during high-grade wear; during low-level abrasion, the horizontal plane rotating mechanism and the vertical plane rotating assembly are controlled to rotate the biconical antenna in the horizontal plane and the vertical plane according to the detected signal intensity, and after rotation is completed, the extrusion positioning assembly is controlled to conduct extrusion fixing. According to the invention, the precision and reliability of angle adjustment of the biconical antenna can be improved.

An apparatus comprising a biconical antenna 202 for generating an omnidirectional beam pattern is presented. A reflector 210 reflects the omnidirectional beam pattern from the biconical antenna into a predetermined beamform. The reflector 204 comprises a ground plane 208 connected to the biconical antenna 202 and a parabolic reflector 210 extending from the ground plane at a predetermined angle. A curvature of the parabolic reflector 210 reflects the omnidirectional beam pattern into the predetermined beam form. The predetermined angle corrects for beam shift of the predetermined beam form caused by the ground plane 208.

The application discloses a composite conformal double-cone antenna, which comprises an upper cone, a lower cone, a hollow dielectric column, a composite sleeve, a cover plate, a base, and a radome, a conical groove structure is arranged at both ends of the hollow dielectric column and closely matches the conical surface and the top end surface of the upper and lower cones, thus realizing accurate positioning of the upper and lower cones and accurate control of the gap between the cone tops, the coaxiality is ensured, and the influence of the traditional dielectric support structure on the antenna radiation performance is effectively avoided, the composite forming sleeve is adopted to realize cooperative installation of the upper and lower cones, installation guidance and radial fixation are provided, the assembly difficulty is significantly reduced, and the operation process is more simple and efficient, the conformal skin radome formed by curing of the composite layer is adopted and a flange flanging structure is designed, so that the radome, the cover plate and the base are integrally fixed, not only the protection is realized, but also the overall rigidity of the antenna is enhanced, and the structural stability and electrical performance of the antenna under complex working conditions are ensured.