7results about How to "Steady pattern" patented technology

The invention relates to a wide-frequency-band common-caliber base station antenna array based on a composite wave-transparent structure, and belongs to the field of base station array antennas in the mobile communication technology. Comprising a low-frequency antenna, a high-frequency antenna and a metal floor, the low-frequency antenna is located above the high-frequency antenna, and the orthographic projection of the low-frequency antenna and the orthographic projection of the high-frequency antenna are partially or completely overlapped on the metal floor; the low-frequency antenna is composed of three layers of composite wave-transparent structures, and when high-frequency electromagnetic waves irradiate the composite wave-transparent structures of the low-frequency antenna, the composite wave-transparent structures are excited to form a mixed wave-transparent structure; two or more resonance points can be introduced into the mixed wave-transparent structure, so that a broadband transmission window is further introduced, and the shielding effect on a high-frequency antenna caused by a low-frequency antenna is inhibited. The broadband common-caliber base station array antenna can work in two broadband working frequency bands, unit directional diagrams of the two frequency bands in the array are kept stable, and the broadband common-caliber base station array antenna has the advantages of being simple in structure, easy and convenient to design, capable of achieving array arrangement conveniently, low in interference and the like.

The utility model discloses a gum dipping tension control device, which is arranged between a metering roller mechanism and a leveling roller mechanism and comprises a tension control roller, a tension control roller, a tension control device, a tension control device, a tension control device and a tension control device, and the tension control roller is rotatably arranged at the discharge end of the metering roller mechanism and is in transmission connection with a tension roller motor; the transition roller is rotationally arranged at the discharging end of the tension control roller; the tension detection roller is arranged at the discharging end of the transition roller and located below the impregnated paper, and a tension sensor is arranged on the tension detection roller; the swing roller is arranged at the discharging end of the tension detection roller and located above the impregnated paper, and the swing roller is in transmission connection with a first driving component and is driven by the first driving component to swing up and down; the tension roller motor and the tension sensor are in signal connection with the control unit, and the control unit adjusts the rotating speed of the tension roller motor according to the detection value of the tension sensor. The impregnation tension control device provided by the utility model can ensure the stability of the tension at the discharge end of the impregnated paper, improve the production efficiency and ensure the product quality.

The present invention discloses a broadband dual-frequency fusion antenna array based on upright oscillators, including a reflector, a metal tube, a low-frequency antenna and a high-frequency antenna, wherein the low-frequency antenna and the high-frequency antenna are both vertically arranged above the reflector, and the high-frequency antenna is four and arranged around the low-frequency antenna and symmetrically about the central axis of the low-frequency antenna, and the metal tube is arranged on the reflector. The broadband base station antenna array enables base station antennas operating in different frequency bands to share an antenna radiation aperture, eliminate mutual interference, and realize the fusion of two base station antennas operating in the frequency bands of 690-960MHz and 1700-2700MHz.

A millimeter-wave dual-frequency dual-polarization laminated patch antenna array, the antenna array is formed by a plurality of millimeter-wave dual-frequency dual-polarization laminated patch antenna units of the same structure arranged at equal intervals on the surface of a metal floor. The antenna unit includes a low-frequency annular metal patch, a high-frequency butterfly-shaped metal patch, a metal floor, an upper and lower dielectric substrate, and two feeding structures. The annular metal patch is located on the upper surface of the upper substrate, and is used to generate low-frequency resonance; the butterfly-shaped metal patch is located on the upper surface of the lower substrate, and is used to generate high-frequency resonance; the lower substrate is placed on the metal floor. The two feeding structures penetrate the metal floor and the two layers of dielectric substrates respectively. After installation, the two feeding units are coaxial with the preset through holes in each layer, and do not contact the inner wall of the through hole. The two layers of metal patches provided by the present invention are both fed by capacitive coupling. Capacitive coupling feeding can offset the additional inductance introduced by orthogonal coaxial feeding, and can achieve dual-frequency and dual-polarization operation.

The invention discloses a wide-band tuned microstrip antenna, in which four outer microstrips loaded with varactors and PIN diodes are closely and symmetrically adjacent to a central microstrip loaded with the varactor to form a symmetrical bifurcated unidirectional current, and the equivalent electrical length of the symmetrical bifurcated unidirectional current is tuned by combining symmetrically distributed PIN diodes and varactor diodes to realize a wide-band tuned edge-radiating microstrip antenna, and the characteristics of stable directional pattern, fast tuning, small size and low profile are taken into account.

A broadband dual-polarized magnetoelectric dipole filter antenna includes a magnetic dipole patch and its dielectric substrate assembly, an electric dipole patch and its dielectric substrate, a bottom dielectric substrate, a pair of coaxial lines, and a pair of feed microstrip lines and their dielectric substrates. The electric dipole dielectric substrate has eight slots for connecting the magnetic dipole dielectric substrate assembly and four slots for connecting the feed microstrip line dielectric substrate assembly. The magnetic dipole dielectric substrate assembly has printed magnetic dipole patches, with the upper part connected to the electric dipole patches and the lower part connected to a metal ground. The feed microstrip lines are printed on the lower surfaces of the feed dielectric substrate and the electric dipole dielectric substrate and are fixedly connected to the bottom dielectric substrate. The upper surface of the bottom dielectric substrate has a printed metal ground and eight slots for connecting and fixing the magnetic dipole dielectric substrate assembly. Metallized circular through-holes allow the inner core of the coaxial lines to pass through, connecting the feed microstrip lines and the outer layer to the metal ground. Without introducing additional filtering circuitry, dual-polarization and bandpass filtering characteristics are achieved, meeting the frequency band requirements of LTE base station communication.

A dual-frequency, dual-polarized magnetoelectric dipole filter antenna is disclosed, relating to a magnetoelectric dipole antenna. It includes a bottom dielectric substrate, a feeding structure, a magnetic dipole dielectric substrate group, an electric dipole dielectric substrate, and a filter magnetic dipole dielectric substrate group. Slots are provided on the bottom dielectric substrate for connecting and fixing the filter magnetic dipole dielectric substrate group; slots are provided on the electric dipole dielectric substrate for the filter magnetic dipole dielectric substrate group to pass through. The magnetoelectric dipole antenna structure generates a low-frequency radiation null point I, extends the end microstrip line of the microstrip power divider to obtain an intermediate-frequency band radiation null point II, introduces an intermediate-frequency band filter magnetic dipole patch to obtain an intermediate-frequency band radiation null point III, and a slot structure is provided in the connection structure between the magnetic dipole and the electric dipole to obtain a high-frequency sideband radiation null point IV. A high-frequency out-of-band filter magnetic dipole patch is introduced to obtain a high-frequency radiation null point V. The filter magnetic dipole is located inside the magnetoelectric dipole antenna, without increasing the antenna profile height and outline dimensions, eliminating the need for a filter network, and achieving dual polarization and dual-frequency bandpass filtering.