31results about How to "Achieving UWB" patented technology

The invention provides an integrated four-point differential feed low-profile dual-polarized oscillator unit and a base station antenna comprising the dual-polarized oscillator unit. The dual-polarized oscillator unit comprises a dielectric substrate and a 180-degree phase differential plate which are vertically arranged in parallel. The dielectric substrate and the 180-degree phase differential plate are connected through a dielectric bracket in a supporting way. The surface, which is back to the 180-degree phase differential plate, of the dielectric substrate is provided with a metal radiation surface. The metal radiation surface is provided with four feed parts of which every two are grouped. The two feed parts of the same group are centrally symmetrical about the metal radiation surface. The two groups of feed parts are orthogonally arranged at the angles of +45 degrees and -45 degrees. The positions, which are corresponding to the four feed parts, of the 180-degree phase differential plate are respectively provided with a feed connecting point. Each feed part and the corresponding feed connecting point are connected through a feed pin. The two feed connecting points connectedwith the feed parts of the same group are connected and then connected with an antenna feed network.

The invention relates to a printing cup-shaped monopole antenna applied in ultra wide band communication. The antenna adopts a substrate integrated waveguide feed and plane printing technology and is suitable for ultra wide bands, multi-band frequency application occasions requiring to realize plane integration on the antenna and a system. The antenna comprises a radiating element (7), a metal ground plane (2), a medium substrate (3) and a coplanar waveguide feed part (1), wherein the radiating element (7) and the coplanar waveguide feed part (1) are arranged on the same side of the medium substrate (3); the thickness (8) of the medium substrate is 2 mm; the middle of the radiating element (7) is provided with three circular holes (4); the semicircular bottom end of the radiating element (7) is connected with the coplanar waveguide feed part (1); and the top end of the semicircular radiating element (7) is formed by a notch (5) and an open circuit short branch knot (6), wherein the other surface of the medium substrate is not provided with a metal plate. Compared with the traditional monopole antenna, the printing cup-shaped monopole antenna has low manufacture cost, can be integrated with a microstrip circuit and also has the characteristics of the ultra wide bands and the omnibearing characteristic.

The invention discloses a circularly polarized microstrip patch antenna. The antenna comprises a conductive grounding plane, a dielectric substrate arranged on the conductive grounding plane, a radiation sheet arranged at the top of the dielectric substrate and a plurality of feed probes arranged on the side walls of the periphery of the dielectric substrate; the dielectric substrate comprises a lower-layer high-dielectric-constant dielectric substrate and an upper-layer low-dielectric-constant dielectric substrate; the radiation sheet is a sheet-shaped circular metal conductor; and a gear-shaped opening of a symmetrical structure is formed in the middle of the radiation sheet. A gradient folding type side coupled feed mode is adopted; the feed probes are gradually bent; the processing issimple; relatively wide bandwidth is easily formed; the circular polarization performance of the antenna is improved; the phase center is stable; right-handed and left-handed circular polarization canbe realized at the same time; the antenna is especially suitable for accurate measurement and guidance system terminal equipment; the two dielectric substrates with different dielectric constants areadopted; and the designed antenna is small in size, light in weight and wide in gain bandwidth which can reach more than 25%.

The invention provides an array antenna beam adjustment device and an array antenna with an adjustable beam width, which relate to the technical field of mobile communication base station antennas. The array antenna beam adjustment device comprises at least one parasitic radiation unit; the parasitic radiation unit is arranged beside an array radiation unit with a to-be-adjusted beam width; the parasitic radiation unit is electromagnetically coupled with the array radiation unit in a preset frequency band to change the beam width of the radiation pattern of the array radiation unit in the preset frequency band. According to the array antenna beam adjustment device and the array antenna with the adjustable beam width, the beams of any frequency band of the array antenna can be adjusted, other frequency bands which do not need to be adjusted are not influenced, and ultra wideband of the whole working frequency band is realized.

The invention discloses an ultra wide band miniature fractal antenna which mainly comprises a ground plate, a twin-whip antenna and an impedance conversion transmission wire, wherein the twin-whip antenna comprises two metal columns vertically arranged on the ground plate; the impedance conversion transmission wire is arranged on the upper surface of the ground plate and is embedded between two metal columns of the twin-whip antenna; the impedance conversion transmission wire comprises at least two metal strips with different widths, the metal strips are arranged according to the order of from small width to big width and connected in an iteration manner in the length direction of the metal strips, wherein the metal strip with minimum width is connected with one metal column of the twin-whip antenna and the metal strip with maximum width is connected with the other metal column of the twin-whip antenna. The ultra wide band miniature fractal antenna can keep wider frequency band, higher radiation efficiency and better directional diagram characteristics while the size of the antenna is effectively reduced.

The invention discloses a millimeter wave dual-polarization near-field measuring probe comprising a gradual change circular waveguide with the caliber gradually increasing in an opening direction, a straight circular waveguide arranged at the starting end of the gradual change circular waveguide and extending in the direction opposite to the opening direction, a short circuit plate arranged at theend of the straight circular waveguide, and four ridge pieces arranged in the two sections of circular waveguide and distributed in a crossed mode. Two feed connectors perpendicular to each other areconnected to the outer portion of the straight circular waveguide and feed the two pairs of ridge pieces respectively to realize vertical/horizontal dual polarization of the antenna. According to theinvention, the circular waveguide composed of the gradual change circular waveguide and the straight circular waveguide is adopted; four ridge pieces which are distributed in a cross shape are arranged in the two sections of circular waveguides, optimization processing is conducted on the four ridge pieces, arc processing is conducted on the open-circuit ends of the waveguides, so that the diffraction effect generated by transmission of electromagnetic waves to a free space between ridges is reduced, and then the performance of a directional diagram is guaranteed. Meanwhile, step processing is adopted at the short-circuit end, and return loss matching can be adjusted by adjusting parameters of steps.

The invention provides an ultra-wideband conformal multi-dielectric-body dielectric resonator antenna and a working method. The ultra-wideband conformal multi-dielectric-body dielectric resonator antenna comprises a dielectric resonator, a floor, a dielectric substrate, a feed port, a feed slot and a feed line. The floor and the dielectric substrate are arc-shaped. The dielectric resonator comprises a first dielectric resonator and a second dielectric resonator. The first dielectric resonator and the second dielectric resonator are arc-shaped and conformal with the arc of the floor. The firstdielectric resonator and the second dielectric resonator have the same arc radius and different radians. The dielectric constants of the first dielectric resonator and the second dielectric resonatorare different. The antenna is fed by the feed line from the feed port, and then, electromagnetic wave energy is coupled and conducted to the first dielectric resonator and the second dielectric resonator on the upper surface through the feed slot in the floor. The center of the feed slot coincides with the center of the floor and coincides with the center of the whole dielectric resonator. The ultra wide band and stable gain performance are achieved by adopting the convex floor and the convex multi-dielectric-body dielectric resonator.

The application discloses a radio frequency wideband frequency agility frequency source. The radio frequency wideband frequency agility frequency source comprises a frequency reference module, a baseband module, a local oscillator module and a frequency conversion module; the frequency reference module is used to output a 1000MHz reference signal to the baseband module and output a 1000MHz excitation signal to the local oscillator module; the baseband module is used to output a 200MHz to 400MHz baseband signal to the frequency conversion module; the local oscillator module is used to output six point frequency signals to the frequency conversion module, wherein the output frequency range of the point frequency signals is 10GHz to 20GHz and the frequency interval is 2GHz; and the frequencyconversion module is used to extend the frequency of the 200MHz to 400MHz baseband signal, so that the output signal frequency covers 1.25-20GHz. Compared with the traditional frequency source, the scheme disclosed by the invention has better indexes and a smaller structure size.

The invention discloses a dipole ground penetrating radar antenna and a ground penetrating radar system. The dipole ground penetrating radar antenna comprises a fixing pipe, two dipole units symmetrically sleeve the outer side of the fixing pipe, and a feed hole is formed in a gap between the two dipole units; a coaxial cable is arranged in the fixing pipe in a penetrating manner, one end of the coaxial cable penetrates through the feed hole and then is connected with the two dipole units, and the other end of the coaxial cable is connected with a signal source; and the coaxial cable comprises a coaxial cable body and a plurality of ferrite magnetic rings, and the plurality of ferrite magnetic rings are sequentially and continuously arranged on the outer side of a coaxial cable body in a sleeving manner. According to the dipole ground penetrating radar antenna and the ground penetrating radar system of the invention, the coaxial cable passes through the fixing pipe to form a novel balun structure; and according to the coaxial cable, the ferrite magnetic rings are arranged on the outer side of the coaxial cable body, the high-resistance choke function of the ferrite magnetic ring is utilized, current on arms of the dipole units is effectively prevented from flowing to the outer side surface of the coaxial cable, it is ensured that the current on the two arms of the dipole units is equal, balanced feed is achieved, distortion of an antenna directional pattern is avoided, and an omnidirectional antenna is realized.

The invention discloses a multi-mode resonance-based ultra-wideband filter, which comprises an open-circuit stub structure (1), microstrip feeder structures (2) and (3) and a ground surface (5) on the lower surface of a dielectric plate. The ultra-wideband is achieved by an interdigital coupling structure formed by transmission microstrip lines in the open-circuit stub structure and the microstrip feeder structures. The related filter has small return loss and insertion loss, good low-frequency characteristic and harmonics inhibition property. The filter is simple in design, compact in structure, attractive in appearance, convenient to process and low in cost, and can achieve 3.1-10.6GHz ultra-wideband.

The invention discloses a Doherty radio frequency power amplifier module based on a novel DreaMOS technology and an output matching network of the Doherty radio frequency power amplifier module. The output matching network comprises a main parasitic capacitor, an auxiliary parasitic capacitor and an inductor, one end of the main parasitic capacitor is connected with a drain electrode of a main path amplifier, and the other end of the main parasitic capacitor is connected with the inductor; one end of the auxiliary stray capacitor is connected with a drain electrode of the auxiliary circuit amplifier, the other end of the auxiliary stray capacitor is connected with the inductor, the main circuit amplifier and the auxiliary circuit amplifier are connected in parallel, the main circuit amplifier and the auxiliary circuit amplifier are DreaMOS transistors, and the main stray capacitor and the auxiliary stray capacitor are respectively a stray capacitor in the main DreaMOS transistor and a stray capacitor in the auxiliary DreaMOS transistor. According to the Doherty radio frequency power amplifier, the DreaMOS technology is adopted, the function of an output matching circuit in the Doherty radio frequency power amplifier is simply and efficiently achieved, and meanwhile ultra wide band, high efficiency and miniaturization are achieved.

A novel high-selectivity ultra wide band band-pass filter disclosed by the present invention is composed of an open circuit stub structure (3), 50-Ohm stub microstrip structures and a metal grounding plate which is on the lower surface of a dielectric slab and is equipped with a dumbbell-shaped groove. The novel high-selectivity ultra wide band band-pass filter of the present invention utilizes an intersected coupling structure composed of three 50-Ohm transmission microstrip lines to realize the ultra wide band, has very small return loss and insertion loss and the good low-frequency characteristic and the harmonic suppression performance, is simple in design, compact in structure, beautiful in appearance and low in cost, is convenient to process, and can realize the ultra wide band of 3.1-10.6 GHz.

The invention discloses a circularly polarized antenna element, and belongs to the technical field of antennas. The circularly polarized antenna element comprises a first dielectric substrate, a second dielectric substrate and a grounding plate which are stacked in sequence. The top surface of the first dielectric substrate is provided with a radiation patch. The second dielectric substrate is provided with a metal wafer and two L-shaped feed structures, the second dielectric substrate is provided with a first through hole and a plurality of second through holes, each L-shaped feed structure comprises a feed probe and a feed line, each feed probe vertically penetrates through the second dielectric substrate and the grounding plate, each feed line comprises a bonding pad part, a connecting part and a fan-shaped part, and the bonding pad part is connected with the connecting part. The small ends of the fan-shaped parts are connected with the bonding pad parts through the connecting parts, and the edges of the two sides of each fan-shaped part are provided with a plurality of notches which are symmetrically arranged along the central axis of the fan-shaped part. According to the circularly polarized antenna element provided by the embodiment of the invention, the coupling effect between the two feeder lines can be effectively weakened, the standing wave bandwidth of the antenna can be effectively improved, and an ultra wide band is realized.

The invention discloses a U-shaped groove based UWB band-pass filter. The filter comprises open circuit stub structures (1) and (2), a 50-ohm-stub microstrip structure (5) and a ground (9) on the lower surface of a dielectric plate. The filter adopts an interdigital coupling structure formed by three 50-ohm transmission microstrip lines to realize the ultra wide band. The filter provided by the invention has low return loss and insertion loss, a good high low-frequency characteristic and high harmonic rejection capability; and meanwhile, the filter is simple in design, compact in structure, attractive in appearance, convenient to process, low in cost, and capable of realizing the 3.1-10.6GHz ultra wide band.

The invention discloses a multimode paster UWB (Ultra Width Band) band-pass filter. The fitler is composed of multimode resonance pasters (101) arranged symmetrically on the upper surface of a medium substrate (104), port pasters (102), micro-strip transmission lines (103), the medium substrate (104) and a metal grounding board (105) below the medium substrate. According to the invention, the multimode resonance pasters are utilized for realizing the UWB band-pass filter. The ring-shaped pasters are utilized for realizing multiple modes and the mode number is adjustable. The multimode paster UWB band-pass filter is simple and compact in structure, small in size, convenient for processing, high in implementability, low in cost, ultra wide in band width and adjustable in mode number. The multimode paster UWB band-pass filter provided by the invention has good in-pass band selection features. The selectivity is good and can allow more signals to pass. The multimode paster UWB band-pass filter has high practical value.

The invention discloses a 20GHz ultra-wideband combiner provided with an isolation degree, comprising a metal box body, a cover plate, a magnet ring and a microwave planar circuit board, wherein the microwave planar circuit board is designed based on the principle of a 6dB bridge type composite resistor network, a first radio frequency connector, a second radio frequency connector and a third radio frequency connector are respectively arranged on the metal box body, both the microwave planar circuit board and the magnet ring are built in the metal box body, the microwave planar circuit board is connected to the first radio frequency connector, the second radio frequency connector and the third radio frequency connector respectively, the magnet ring sleeves a position where the microwave planar circuit board is connected to the third radio frequency connector, and the cover plate covers the metal box body. The 20GHz ultra-wideband combiner provided with the isolation degree disclosed by the invention has the advantages of simple structure, small volume, low cost, good technical indicators, easiness for implementation and commissioning and capability of not only realizing 20GHz ultra wideband but also meeting requirements for applications in civil mobile communication, optical communication and some special frequency fields, and is provided with two input ports with a higher isolation degree.

The invention discloses an ultra-wideband dielectric resonator antenna module and electronic equipment, the ultra-wideband dielectric resonator antenna module comprises a dielectric substrate and at least one antenna unit, the dielectric substrate comprises a first surface and a second surface which are opposite to each other, the antenna unit comprises a dielectric resonator, and the dielectric resonator is arranged on the first surface of the dielectric substrate; the shape of the dielectric resonator is a triangular prism, the bottom surface of the triangular prism is an isosceles triangle, the height of the isosceles triangle is 0.36 lambda-0. 4 lambda, the height of the dielectric resonator is 0.36 lambda-0. 4 lambda, and lambda is the wavelength length; and the dielectric resonator is a ceramic dielectric resonator. The antenna bandwidth can be increased, and the coverage frequency band is wide.