16results about How to "Improving Impedance Bandwidth" patented technology

The embodiment of the utility model provides a dual-polarization dielectric dipole antenna, the antenna comprises a cross-shaped radiation unit and a guide sheet, the cross-shaped radiation unit comprises a first dielectric plate and a second dielectric plate which are in cross-shaped vertical cross connection; the feed balun circuit on the second dielectric plate crosses the side edge of the top of the first dielectric plate and is connected with the radiation arm on the same side surface of the second dielectric plate; a through hole is formed in the position, at the crossed connection position of the first dielectric plate and the second dielectric plate, of the second dielectric plate and is flatly attached to the first dielectric plate, so that the feed balun circuit on the first dielectric plate is connected to the radiation arm on the same face of the first dielectric plate through the through hole along the penetrating plane. According to the embodiment of the invention, the number of holes in the cross-shaped radiation unit is reduced, so that the antenna is simple to manufacture, and the production cost and the intermodulation distortion risk are reduced. In order to further reduce radiation unit holes, the two groups of feed balun circuits can be wound and crossed from the top, or one group of radiation arms are optimized into slot coupling feed, and coupling perforation is canceled.

The invention discloses a circularly polarized array antenna and electronic equipment. The circularly polarized array antenna comprises a feed network layer, a signal radiation layer and a reflection metal layer. The feed network layer is used for generating a radiation signal based on an input signal. The signal radiation layer is connected with the feed network layer, and the signal radiation layer is used for transmitting radiation signals. The reflection metal layer is arranged between the feed network layer and the signal radiation layer, and the reflection metal layer is used for reflecting radiation signals radiated towards the feed network layer. The feed network layer and the signal radiation layer are separated and located in different layers through the reflection metal layer, the axial ratio bandwidth and the circular polarization gain of the circular polarization array antenna can be improved under the condition that the thickness of the circular polarization array antenna is reduced, the impedance bandwidth is improved, and the antenna performance is improved. The problem that miniaturization low profile, broadband and high gain of the existing circularly polarized array antenna cannot be considered at the same time is solved.

The invention discloses a low-profile ultra-wideband antenna and a working method thereof, and the antenna comprises a radiator which carries out the effective radiation of the antenna at a first frequency band; the antenna feed body and the radiating body are partially projected and overlapped along the direction vertical to the ground plane, and the projected and overlapped parts are mutually coupled to form a coupled feed structure; the antenna feed body is used for transmitting energy to the radiator and serves as the radiator to provide impedance matching in a second frequency band; the coupled feeding structure is used for carrying out coupled feeding, realizing impedance matching of the first frequency band and expanding the impedance bandwidth of the first frequency band; the branch antenna is used for providing radiation in a third frequency band and assisting the radiation of the parasitic antenna in a fourth frequency band; the parasitic antenna provides radiation in a fifth frequency band. The antenna is used for realizing ultra-wide frequency band coverage in a limited space, and good radiation performance and impedance matching effect can be provided in each frequency band.

The application discloses a miniaturized multilayer capacitive coupling LTCC dual-frequency antenna, which comprises an LTCC substrate, four metal layers embedded in the LTCC substrate, and a feeding electrode, a rear auxiliary electrode, a left ground electrode and a right ground electrode packaged on the surface of the LTCC substrate. The LTCC substrate comprises five dielectric layers, and the four metal layers are sequentially stacked in the vertical direction and are separated by the dielectric layers between adjacent metal layers. The four metal layers comprise a first coupling patch and a second coupling patch, a third coupling patch, a first radiation plate and a second radiation plate. The first coupling patch and the third coupling patch are coupled with the first radiation plate through interlayer coupling to generate a first resonant frequency; and the second coupling patch and the second radiation plate are coupled through interlayer coupling to generate a second resonant frequency which is higher than the first resonant frequency. The application realizes dual-frequency operation in a small size by optimizing the antenna structure, and has the characteristics of simple structure, easy processing and stable performance.

The present invention belongs to the field of wireless communication technology, and provides a circularly polarized grid packaged antenna based on the HDI process to solve the transmission and reception problems of circularly polarized electromagnetic waves in the 5G millimeter wave frequency band. The grid packaged antenna of the present invention has broadband characteristics and is suitable for signal transmission in the 5G millimeter wave frequency band; the HDI process is adopted to reduce the manufacturing cost; at the same time, the open-loop structure is used as the short side of the grid array antenna to achieve excellent circular polarization performance, and it helps the antenna to receive electromagnetic waves of any polarization, and also enables the antenna's radiated waves to be received by any polarized antenna; the arc structure replaces the straight long side of the traditional grid array antenna, which not only improves the performance of the antenna, but also greatly reduces the size of the package. In summary, the present invention provides a circularly polarized grid packaged antenna based on the HDI process for use in the 5G millimeter wave frequency band, which can achieve broadband characteristics, while significantly improving the circular polarization performance of the antenna, reducing the size of the package, and reducing the packaging cost.

The present invention discloses a bidirectional radiating planar dipole antenna array operating in the millimeter wave frequency band, comprising a first metal sheet, a first dielectric substrate, a second dielectric substrate, a second metal sheet, a third dielectric substrate, and a third metal sheet; the first metal sheet is attached to the upper surface of the first dielectric substrate; the second dielectric substrate is attached to the lower surface of the first dielectric substrate; the third dielectric substrate is located below the second dielectric substrate; the upper and lower sides of the second metal sheet are attached to the lower surface of the second dielectric substrate and the upper surface of the third dielectric substrate respectively, and the third metal sheet is attached to the lower surface of the third dielectric substrate. The present invention realizes bidirectional radiation characteristics within the operating frequency band, and simultaneously realizes high gain and low profile characteristics. The antenna array consists of two dipole antenna units with the same structure and a power divider.

The invention discloses an ultra-wideband H-plane waveguide T-junction power divider which comprises an input rectangular waveguide, a matching rectangular waveguide, a matching cylinder, a rectangular partition plate, two output rectangular waveguides and two adjusting cavities. The center line of the matching cylinder coincides with the center line where the vertical cross section and the longitudinal cross section of the output rectangular wave intersect, and the bottom face of the matching cylinder is attached to the bottom face of the output rectangular waveguide. The rectangular partition plate is positioned on the opposite side of the input rectangular waveguide and is embedded from the top to the input rectangular waveguide; the two adjusting cavities are located on the opposite side of the input rectangular waveguide and are arranged on the two sides of the rectangular partition plate respectively. Through the above structure, the power divider is very simple and compact in structure and easy to process, the impedance bandwidth of the input port S11 < =-20dB is higher than 64.9% in the frequency band of 4.44 GHz-8. 71 GHz, the amplitude and phase consistency of two paths of output signals in the frequency band is good, and the power divider has good popularization value.

This invention discloses a microwave and millimeter-wave circularly polarized antenna based on a SIW circular cavity, comprising a first dielectric substrate, a second dielectric substrate, a millimeter-wave radiating patch, a microwave radiating patch, a microwave feed patch, a metal via, a millimeter-wave SIW circular cavity, a metal ground plane, a microwave feed probe, a microwave feed network, and a millimeter-wave feed network. The upper surface of the first dielectric substrate is printed with the millimeter-wave radiating patch, the microwave radiating patch, and the microwave feed patch. The millimeter-wave radiating patch has a radiating slot, and the microwave feed patch and the microwave radiating patch are connected. The second dielectric substrate is located directly below the first dielectric substrate. The upper surface of the second dielectric substrate is printed with a metal ground plane, and feed slots and feed circular holes for the microwave feed probe to pass through are etched on the metal ground plane. The lower surface of the second dielectric substrate is printed with the microwave feed network and the millimeter-wave feed network. This invention has advantages such as multi-frequency operation, wide bandwidth, and dual circular polarization, and has certain potential in wireless communication applications.

The invention discloses a broadband circularly polarized antenna which comprises a feed structure and a radiation structure, the feed structure adopts a double-layer dielectric structure, a floor is distributed in the middle of the double-layer dielectric structure, an upper feeder line is distributed between the floor and a top dielectric layer, and a lower feeder line is distributed between the floor and a lower dielectric layer. The upper-layer feeder line is distributed between the floor and the bottom-layer medium, the lower-layer feeder line is distributed between the floor and the bottom-layer medium, the upper-layer feeder line and the lower-layer feeder line are connected through a via hole structure, and the position setting of a total feed port of the antenna meets the condition that the phase difference of the antenna excited by the upper-layer feeder line and the lower-layer feeder line is 90 degrees. According to the invention, the upper and lower layers of transmission lines are connected by adopting a double-layer dielectric plate structure and a via hole mode, and the phase difference of the two sections of transmission lines to excite the antenna is 90 degrees by selecting the position of a port, so that the relatively strong frequency change characteristic and loss caused by the use of an additional multi-section phase shift microstrip line and a power divider structure are avoided; and the complexity and the overall size of the feed structure are reduced.

The present invention discloses a left-hand circular polarization reconfigurable implantable antenna and a reconfigurable method, comprising a lower dielectric substrate and an upper dielectric substrate, wherein an antenna radiation unit is arranged on the upper surface of the lower dielectric substrate, a metal floor is arranged on the lower surface of the lower dielectric substrate, and the upper dielectric substrate covers the antenna radiation unit, and the antenna radiation unit is divided into two parts by a U-shaped groove, and a switching diode group is arranged on the two arms of the U-shaped groove to connect the two parts of the antenna radiation unit. The present invention has the advantages of large impedance bandwidth, miniaturization, circular polarization, polarization mismatch resistance, high gain, and left-hand circular polarization switchability, and can be applied to mobile medical communications to solve the polarization mismatch problem.

The present invention discloses a graphene-based circularly polarized ingestible antenna for a capsule endoscope device. The materials of the radiation units and the floor of each layer of the antenna are copper-clad graphene film. The copper-clad graphene film material has a high carrier density and can increase the working bandwidth and gain of the ingestible antenna. The graphene double S combined structure radiation patch (4) and the graphene double S combined structure radiation patch (5) are connected through four short-circuit probes to form a composite spiral structure, thereby generating circular polarization characteristics, reducing the bit error rate while suppressing multipath interference. The hook-shaped combined structure of the graphene hook-shaped combined structure radiation patch can reduce the resonant frequency of the antenna and increase the impedance bandwidth of the antenna. The volume of the antenna is only π×(4.5) 2 mm 3 It has the characteristics of wide bandwidth, circular polarization, anti-interference, good electromagnetic compatibility and small size. It is suitable for ISM 2.4GHz frequency band and can meet the working requirements after being taken into complex environment.

The present invention proposes a GNSS full-band satellite positioning terminal antenna, characterized in that it comprises two dipole arms with a phase difference of 180°, the two dipole arms are respectively located on the upper surface and the lower surface of a dielectric plate and are respectively connected to the inner and outer centers of a coaxial line running through the center of the dielectric plate; the two monopole arms of each dipole arm have a phase difference of 90° and are connected through a three-quarter ring arranged on the periphery of the coaxial line. It can obtain a wider impedance bandwidth and axial ratio bandwidth, ensure the miniaturization of the antenna, and realize circularly polarized radiation.

The invention discloses a circularly polarized log-periodic antenna based on radiation oscillator rotation, belongs to the technical field of antenna engineering, and solves the problem of how to design a circularly polarized log-periodic antenna with wide bandwidth, low profile and simple structure. A parallel collection line is taken as an axis, and corresponding circularly polarized characteristics are formed by rotating a plurality of groups of radiation oscillators by a certain angle; the antenna is only provided with a group of radiation oscillators according with the regular change of a log-periodic antenna, has no main and auxiliary oscillators, has a simpler structure, is easy to implement, and forms a circular polarization effect by rotating the radiation oscillators to a certain phase and the phase difference between electromagnetic waves from each oscillator to the zero point of the antenna. And the log-periodic antenna can obtain good impedance bandwidth and 3dB axial ratio bandwidth in a working frequency band.

The present invention discloses a low sidelobe broadband low cross-polarization planar dipole antenna array, comprising a multilayer dielectric substrate; a first metal surface; a second metal surface; a feed network; a dipole antenna array; each dipole antenna unit comprises a top dipole arm, a middle dipole arm, and a bottom dipole arm; the first metal surface is connected to one end of the top dipole arm; the second metal surface is connected to one end of the bottom dipole arm; the feed network comprises a signal conducting strip and a metallized through hole; the signal conducting strip at the output end of the feed network is directly connected to the signal input end of each dipole antenna unit; the antenna array etches a pair of slits at appropriate positions, so that the dipole works in a half-wavelength mode and a 1.5 times wavelength mode at the same time, greatly improving the impedance bandwidth of the dipole antenna. The antenna array adopts a SICL structure for feeding, which can effectively suppress the cross polarization of the dipole antenna, and the SICL structure works in a quasi-TEM mode without a cutoff frequency.

The invention discloses a bandwidth improving method based on a thin-film small antenna, an antenna and electronic equipment, and the method comprises the steps: carrying out the model construction under the condition that the area of an original thin-film small antenna meets the impedance matching requirement, obtaining an original thin-film small antenna model, introducing a penalty function, and multiplying the material density with a penalty material volume factor, and taking the average material volume factor as a constraint condition, carrying out topological optimization on the original thin film small antenna by using a variable density method of which the difference value type is SIMP, carrying out multiple times of iterative calculation in topological optimization to adjust material distribution, and taking the maximum magnetic layer average stress as a target function until a preset number of iterations is reached to obtain the thin film small antenna after iteration. According to the invention, the thickness and the area of the original thin-film small antenna are not changed and guaranteed, the shape of the original thin-film antenna is subjected to topological optimization by taking the optimal bandwidth as the target to obtain the improved thin-film small antenna, the antenna processing complexity can be reduced, the impedance bandwidth of the antenna is effectively improved, and thus the requirement of a system for the antenna bandwidth is met.

The utility model provides a circularly polarized ultra-wideband microstrip patch antenna based on a metasurface. The circularly polarized ultra-wideband microstrip patch antenna based on the metasurface comprises a dielectric substrate I, low-loss dielectric foam, a dielectric substrate II, a metal ground layer, the metasurface, a slotted circular patch, a metalized through hole and a feed port, the slotted circular patch is arranged on the upper surface of the dielectric substrate I in parallel, the low-loss dielectric foam is arranged between the dielectric substrate I and the dielectric substrate II, and the metasurface is arranged on the upper surface of the dielectric substrate II in parallel; the metal ground layer is located on the lower surface of the first dielectric substrate, four rectangular grooves are etched in the metal ground layer, the metalized through hole is used for connecting the slotted circular patch and the metal ground layer, and the metalized through hole forms a feed port through a coaxial line. According to the ultra-wideband circularly polarized antenna, ultra-wideband circularly polarized radiation is realized through a simple planar structure, and the ultra-wideband circularly polarized antenna has the characteristics of low profile and small size, and is convenient for further processing and integration.