15results about How to "Good circular polarization performance" patented technology

The invention discloses a terahertz wave band circularly polarized antenna based on sequential rotation feeding, and belongs to the field of radio frequency front-end devices. The circularly polarized antenna is composed of four microstrip patches, chamfers located on a radiation patch, a microstrip line, a microstrip line feed port, a sequential rotation feed network, a dielectric substrate, a metal ground backboard and a microstrip line matching structure. A 90-degree phase difference is generated by strictly designing the electrical length from each port to the feed network to realize circular polarization performance, right-handed circularly polarized waves are radiated, the radiation gain is 10.47 dB, the 3dB axial ratio bandwidth is greater than 8GHZ, the 3dB axial ratio range exceeds 90 degrees, and the complete half-power beam width is covered. The antenna adopts the microstrip line for feeding, the loss of the microstrip line is small, the microwave transmission characteristic is good, and the antenna radiation efficiency is high. The antenna adopts a single-layer board design, has no complex feed network, and is simple in structure and convenient to manufacture.

The invention relates to the technical field of microwaves and antennas, particularly discloses a miniature ultra-wideband planar helical antenna based on a magnetic medium, and aims to solve the problem that indexes such as miniaturization, ultra-wideband, high gain and circular polarization are difficult to consider in the design of an existing helical antenna. The helical antenna structure comprises an antenna radiation unit, a metal stepped shielding inner cavity, a Balun feed structure, a feed connector, a circular metal reflection back cavity and a magnetic dielectric material. According to the invention, the magnetic dielectric material is arranged below the radiation circuit so as to regulate and control the surface current distribution at the tail end of the circuit and centrally regulate and control the size and direction of an electromagnetic field vector in a cavity, so that the reduction of the transverse and longitudinal dimensions of the antenna is effectively realized; the impedance matching bandwidth and the axial ratio bandwidth of the miniaturized antenna can be improved while the high gain of the antenna is kept, the extremely high impedance matching bandwidth can be realized, and the excellent circular polarization characteristic is kept in the bandwidth range.

The present invention discloses a method, device and medium for joint optimization of gain axis ratio of a small-scale phased array at low elevation scanning, and belongs to the technical field of gain optimization of airborne phased array antennas. The method of the present invention comprises: inputting the right-handed circularly polarized electric field of the electric field unit pattern of each array unit in a small-scale array of a uniform planar phased array antenna, and the components of the electric field in the azimuth and elevation planes; constructing a joint optimization model for gain axis ratio of low elevation scanning based on scanning axis ratio and gain, wherein the objective function is a slack variable that minimizes the scanning axis ratio, and the constraints of the joint optimization model include: scanning axis ratio constraint, gain constraint and constant excitation amplitude modulus constraint; solving the optimization model, and outputting array excitation, scanning axis ratio and gain in a predetermined scanning direction. The present invention improves the circular polarization performance by reducing the low elevation scanning axis ratio while ensuring the scanning gain, thereby avoiding the degradation of circular polarization performance during low elevation scanning and causing a decrease in gain.

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 invention provides electronic equipment, a gap extending along a first direction is formed in a first radiator of the electronic equipment, so that the first radiator comprises a first radiation arm extending along the first direction of the bottom wall of the gap and a second radiation arm extending along a second direction of the side wall of the gap, and the second direction is perpendicular to the first direction; the second radiator and the first radiator are arranged at an interval, and the second radiator extends along the first direction; the first feed source is electrically connected to the first radiator or the second radiator. The first feed source is used for exciting the first radiator to support a first wireless signal in a circular polarization mode together with the second radiator and the floor in a half-wavelength resonant mode. Therefore, the electronic equipment has better circular polarization performance, and the radiation performance of the electronic equipment and satellite communication can be improved.

The application discloses a heart-shaped broadband circularly polarized patch antenna, which comprises a dielectric substrate, a heart-shaped radiation patch, a microstrip feed line and a ground plate. A characteristic mode analysis method suitable for irregular geometric shapes is proposed, that is, a plurality of non-orthogonal characteristic modes are used to realize a broadband circularly polarized antenna. The application has the advantages of simple structure, beauty, compactness, simple feed mode, wide impedance and axial ratio bandwidth, and stable radiation pattern. The new method has clear physical mechanism, simple steps and wide application prospect.

The invention provides an antenna assembly and electronic equipment, the outer edge of a radiator is symmetrical about a first center line, the radiator comprises a feed part and a tuning part which are arranged at an interval, the feed part is located on the first center line of the radiator, the feed part and the midpoint of the first center line are arranged at an interval, and the tuning part and the first center line are arranged at an interval; one end of the capacitor structure is electrically connected with the tuning part, and the other end of the capacitor structure is grounded; the signal source is used for exciting the radiator to form a target resonance mode supporting a target frequency band, the target resonance mode enables the radiator to form a first resonance current at a first phase along the outer edge, and the target resonance mode enables the radiator to form a second resonance current at a second phase along the outer edge; the angle between the direction of the first resonance current and the direction of the second resonance current is a preset angle, so that circularly polarized waves are formed. According to the invention, the circular polarization of the antenna assembly and the electronic equipment can be improved.

The invention discloses a circularly polarized wave regulation and control method and device and electronic equipment. The radiator comprises a first radiation section and a second radiation section which are connected in a bending manner. The length between the first grounding point and the connection point is smaller than or equal to 1 / 16 wavelength of the second frequency band, and the distance between the feeding point and the first grounding point is smaller than 1 / 16 wavelength of the second frequency band. The signal source is used for exciting the radiator to form a first resonant mode and a second resonant mode supporting a second frequency band. And the second resonant mode is a 1 / 2 wavelength mode of a second frequency band formed between the first free end and the second free end. The resonant current of the second resonant mode includes a third resonant current between the first free end and the connection point and a fourth resonant current between the connection point and the second free end. The third resonance current and the fourth resonance current form circularly polarized waves, and the radiation direction of the circularly polarized waves is related to the length proportion of the first radiation section and the second radiation section. The circular polarization performance can be improved.

This invention discloses a heterogeneous array with circularly polarized wide-angle scanning and omnidirectional coverage, comprising a dielectric substrate, a metal surface A, a metal surface B, a top element, side elements, and a feed probe A. The top and side elements are connected to the dielectric substrate, and the six side elements are all connected to the metal surface A via the feed probe B. The metal surface A is connected to the dielectric substrate, and the metal surface B is connected to the metal surface A. This invention features a small number of antenna elements, a small size, low manufacturing cost, and the ability to perform circularly polarized wide-angle scanning in any azimuth.

The invention provides an antenna device and electronic equipment, a first radiator and a second radiator of the antenna device are stacked with a floor and are arranged at intervals, a coupling gap is formed between the second radiator and the first radiator, and the second radiator comprises a split ring structure. The split ring structure is of an asymmetric structure relative to a first axis formed by the feeding point of the first radiator and the first center point. According to the antenna device, the signal source can excite the first radiator, the second radiator and the floor to jointly support receiving and transmitting of wireless signals in a circular polarization mode, the antenna device can have the excellent circular polarization performance, the antenna device can be more suitable for the use scene of satellite communication, and the radiation performance of the antenna device and satellite communication can be improved.

The application relates to an ultra-wideband circularly polarized Vivaldi antenna, which comprises a rotationally symmetric antenna and a feed network; the rotationally symmetric antenna is arranged on the feed network; the rotationally symmetric antenna comprises four Vivaldi antenna units, the four Vivaldi antenna units are orthogonally arranged in sequence, and are fixedly connected with the feed network; each Vivaldi antenna unit comprises a radiation arm, a first ground plane and a substrate; the radiation arm and the first ground plane are arranged on a first surface of the substrate, and a first side of the radiation arm is connected with the first ground plane; the first ground plane of a latter Vivaldi antenna unit is connected with a second side of the radiation arm of a former Vivaldi antenna unit, and serves as a second ground plane of the former Vivaldi antenna unit. The application adopts a half-mode form of the Vivaldi antenna, the antenna has a symmetrical and stable radiation pattern and a compact aperture size through structural multiplexing of the ground planes of the antenna units; and the antenna has good circular polarization performance in combination with the feed network which has good amplitude and phase responses.

The invention discloses a small-scale phased array low-elevation scanning gain axial ratio joint optimization method and device and a medium, and belongs to the technical field of airborne phased array antenna gain optimization. The method comprises the following steps: inputting a right-handed circularly polarized electric field of an electric field unit directional diagram of each array unit in a small-scale array of the uniform plane phased-array antenna, and components in azimuth plane and pitching plane directions of the electric field; a low-elevation scanning gain axial ratio joint optimization model is constructed based on the scanning axial ratio and the gain, an objective function of the joint optimization model is a slack variable for minimizing the scanning axial ratio, and constraint terms of the joint optimization model comprise scanning axial ratio constraint, gain constraint and constant excitation amplitude module value constraint; and solving the optimization model, and outputting the array excitation, the scanning axial ratio in the predetermined scanning direction and the gain. Under the condition of ensuring the scanning gain, the circular polarization performance is improved by reducing the low-elevation scanning axial ratio, and gain reduction caused by circular polarization performance degradation during low-elevation scanning is avoided.

The invention provides an X data transmission phased-array antenna multi-beam-position phase calibration method, the calibration method is realized by a calibration device, the calibration device comprises a to-be-measured data transmission phased-array antenna, an L-shaped tool, a waveguide probe and a balancing weight, the to-be-measured data transmission phased-array antenna and the balancing weight are both installed on the L-shaped tool, and the waveguide probe is arranged right opposite to the L-shaped tool. The method has the advantages that compared with single-beam-position normal direction calibration, multi-beam-position simultaneous calibration is adopted during calibration, calibration errors are reduced, measurement results are more accurate, sampling time of single-beam-position data and sampling time of multi-beam-position data are the same when data are collected at the same time, and when the scale of an array plane is large, the measurement accuracy is improved. The multi-channel multi-beam-position phase can be obtained through one-time testing, and the testing efficiency is high.

The utility model relates to the technical field of antennas, in particular to a miniaturized four-arm spiral dipole antenna, which comprises a high-frequency dielectric substrate, and antenna units are arranged on the upper surface and the lower surface of the high-frequency dielectric substrate. The two antenna units are arranged on the upper surface and the lower surface of the high-frequency dielectric substrate respectively, so that the overall size of the antenna is remarkably reduced, the multiple spiral arms are spirally arranged in the circumferential direction of the cross-shaped loading piece, the high-frequency dielectric plate is introduced into the middle of the antenna units with the upper-layer spiral structure and the lower-layer spiral structure, and therefore the high frequency reduction effect is achieved; the axial ratio performance of the antenna can be effectively optimized, the circular polarization effect is improved, the signal receiving and transmitting stability is enhanced, meanwhile, the radiation efficiency of the antenna is improved through a double-helix structure formed by the cross-shaped loading pieces on the upper surface and the lower surface of the high-frequency dielectric substrate and the multiple helix arms, the miniaturization of the antenna is ensured, and meanwhile the antenna is more compact. Good performance can still be kept, manufacturing and integration are facilitated, the production cost is reduced, and the market competitiveness is improved.

The utility model relates to the technical field of antennas, in particular to a circularly polarized antenna and a wearable device. The circularly polarized antenna comprises a grounding plate which is provided with a feed port; the feed body is provided with a first coupling end and a second coupling end, and the first coupling end is electrically connected with the feed port; one end of the first radiator is connected with the second coupling end, and the other end of the first radiator is connected with the grounding plate; one end of the second radiating body is connected with the second coupling end, the other end of the second radiating body is separated from the grounding plate, and the second radiating body and the first radiating body are located on the two sides of the feed body respectively in the circumferential direction of the grounding plate. The first radiating body is grounded, so that when the circularly polarized antenna works, the current intensity of the grounding end of the first radiating body is relatively high, that is, current exists on the antenna branch knot and certain current exists on the grounding plate, and the current distribution on the left side and the right side is relatively uniform, so that a circularly polarized directional diagram is relatively symmetrical and stable; and the circular polarization effect of the circular polarization antenna is improved.