6results about How to "Realize omnidirectional radiation" patented technology

The invention relates to an antenna module, a laminated assembly and a vehicle, currents on two feed branches of a dipole antenna in the antenna module go in and out respectively, so that the currents on the two feed branches of the same dipole antenna are in the same phase, and the currents on two radiation branches are in the same direction and in the same phase. The currents on the radiation branches of the plurality of dipole antennas are in the same phase and are transmitted along the same direction, an annularly distributed radiation branch is constructed, and when an excitation signal is accessed to the feed port, a current loop is formed on the plurality of radiation branches so as to support an annular current resonance mode at a target frequency band. The planar antenna can be arranged on any non-conductor planar substrate, when the antenna module is applied to a vehicle, metal arrangement such as a vehicle bumper can be avoided, a single antenna module can support omnidirectional radiation of a target frequency band, the number of the antenna modules is reduced, and the antenna cost is reduced.

This application provides an antenna and a terminal. The antenna includes a first element, a second element, and an adjustable reactance element. The first element receives an excitation current through an electrical connection with an antenna feed line; the second element generates an induced current through electromagnetic induction by the first element. The adjustable reactance element is disposed at one end of the first element near a reference plane, and / or, the adjustable reactance element is disposed at one end of the second element near the reference plane; the reference plane has its origin at the connection point between the first element and the antenna feed line and is perpendicular to the axis of the first element. The adjustable reactance element has an adjustable reactance value, used to adjust the phase difference between the excitation current and the induced current, and the phase difference is related to the target angle radiated by the antenna. This application embodiment achieves arbitrary beam pointing of the antenna radiation as specified by the user, while also satisfying the characteristics of a small size and low profile antenna.

The present invention discloses a built-in antenna type street lamp structure, including a lamp holder and a lamp base, a lamp pole is connected between the lamp holder and the lamp base, the lamp pole also serves as an antenna body, an omnidirectional antenna is installed in the antenna body; the lamp base is fixed to a cement foundation by anchor bolts, a wiring tube is arranged in the cement foundation; the omnidirectional antenna includes a dielectric substrate, a plurality of groups of radiation units are arranged on the dielectric substrate, any radiation unit includes a first radiation arm arranged on the front of the dielectric substrate and a second radiation arm arranged on the back of the dielectric substrate, the first radiation arm and the second radiation arm are arranged symmetrically up and down, and a feeding device for connecting a cable device is arranged between the two. The present invention can achieve signal coverage of the 806-960MHz frequency band while meeting normal lighting requirements, and has the advantages of good concealment, small size, light weight, and low cost, which can greatly reduce the panic of community residents about the electromagnetic environment.

The embodiment of the application provides a kind of dual-frequency antenna based on hybrid radiation mode, it includes butterfly electric dipole unit, ground plate, dielectric substrate and feed part;Wherein, the butterfly electric dipole unit and ground plate are all set to the upper surface of dielectric substrate, the feed part is set to the lower surface of dielectric substrate;The butterfly electric dipole unit and ground plate are jointly provided with opening gap, and the opening gap is equivalent to magnetic dipole;The butterfly electric dipole unit includes two dipole arms and two connecting pieces, and the two dipole arms are connected to ground plate by two connecting pieces respectively;Two dipole arms are located at the two sides of opening gap respectively, and two connecting pieces are also located at the two sides of opening gap respectively.The dual-frequency antenna of the application realizes the function of low frequency omnidirectional radiation and high frequency directional radiation using planar structure, has good antenna performance, and the processing cost is low;And realize the wideband dual-frequency antenna performance and simplify the structure of antenna.

The present invention discloses an implicit conformal high temperature resistant microstrip / patch antenna unit, which can work stably and reliably in a high temperature environment of 400 degrees Celsius. The present invention is implemented by the following technical scheme: an antenna microstrip plate fixedly connected by a multilayer dielectric plate is provided in a rectangular cavity close to the back end of the conformal antenna fairing, the rectangular cavity is surrounded by magnetic walls to form a resonant cavity, the sealed end cover encapsulates the PCM in the melting heat chamber to block the conduction of external heat, the PCM uses the material's own specific heat capacity to store / release heat, and senses the heat of the antenna microstrip plate in the form of heat absorption / release energy conversion, the conformal radiation unit is fed through a microstrip line or a coaxial line, and TM10 is fed on the wide side and long side of the microstrip patch antenna, so that a radio frequency electromagnetic field is excited between the conductor patch and the ground plate, and mutually perpendicular electric field components are formed in the normal direction of the antenna surface, and the current is distributed as a standing wave on the transmission line with an open terminal, and radiates outward through the gap between the patch and the surrounding ground plates.

The utility model discloses a miniaturized double-frequency knife-shaped antenna, and particularly relates to the field of antennae, the interior of an antenna body is fixedly connected with a pcb, the pcb is electrically connected with a low-frequency antenna radiator, a high-frequency antenna radiator and a loading resistor, the bottom of the low-frequency antenna radiator is in short circuit with an antenna bottom plate, the middle end of the low-frequency antenna radiator is electrically connected with the loading resistor, and the high-frequency antenna radiator is electrically connected with the loading resistor. The top of the low-frequency antenna radiator and the bottom of the high-frequency antenna radiator are designed in a fusion manner; and the high-frequency antenna radiator is fed through a short-circuit point of the low-frequency antenna radiator and is connected to an output port of the antenna bottom plate. Through cooperation of the structures, on the premise that the knife-shaped appearance of the antenna is met, the radiation environment of the antenna is optimized, omnidirectional radiation of an electromagnetic wave azimuth plane is achieved, and high-frequency and low-frequency directional diagrams do not interfere with each other; and meanwhile, by designing a connecting structure between the two frequency bands, the antenna can meet vertical polarization radiation of single-port dual-frequency and dual-port dual-frequency according to requirements, and the application scenarios are greatly enriched.