7 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.

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.

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.