45results about How to "Reduce the impact of radiation performance" patented technology

The invention discloses a directional diagram reconfigurable antenna and a phased array thereof, and belongs to the technical field of a microwave antenna. The directional diagram reconfigurable antenna is proposed based on slotted fan-shaped patches; through reconfiguration of a feeding network, radiation directional diagrams of four kinds of modes can be realized, and wave beam scanning on the azimuth plane is realized; by performing reasonable arraying through the directional diagram reconfigurable antenna, one-dimensional and two-dimensional large-angle wave beam scanning of the directional diagram on the pitching plane can be realized. The directional diagram reconfigurable antenna is simple and creative in structure, convenient to array, and can be widely applied to the fields of mobile communication, satellite communication, radar and the like.

The invention discloses an electronic device which comprises a middle frame, wherein the middle frame comprises a middle plate and an annular frame, the outer circumferential wall of the middle plateis connected with the inner circumferential wall of the annular frame, a mounting groove is defined by the middle plate and the annular frame, and a through hole penetrating through the annular framein the thickness direction of the annular frame is formed in the annular frame; a waveguide antenna which is arranged in the through hole; a circuit board which is arranged in the mounting groove, wherein a radio frequency integrated circuit is arranged on the circuit board; a feed line, wherein one end of the feed line is connected with the radio frequency integrated circuit, the other end of thefeed line is connected with the waveguide antenna, and the radio frequency integrated circuit feeds an excitation signal to the waveguide antenna through the feed line so as to excite the waveguide antenna to transmit and/or receive an electromagnetic wave signal from the through hole. According to the electronic device, the internal space of the electronic device can be saved, and the influenceof functional devices in the electronic device on the radiation performance of the waveguide antenna can be reduced.

The invention discloses a broadband, high-gain and double-slot Vivaldi antenna, which comprises a dielectric plate, a double-slot tapered slot line, edge waves and a feed element, wherein one surface of the dielectric plate is provided with a metal layer as the upper surface; the double-slot tapered slot line is arranged at the upper surface of the dielectric plate and is in an exponential gradient trumpet-shaped opening; the edge waves are arranged on the upper surface of the dielectric plate; and the feed element is arranged on the lower surface of the dielectric plate and is used for feeding the tapered slot line. By the technical scheme disclosed by the invention, the radiation gain of the Vivaldi antenna within a complete working band can be improved.

The invention provides a low-frequency radiation unit. The low-frequency radiation unit comprises a dielectric substrate, a radiator and a feed balun, wherein the radiator comprises two dipoles whichare orthogonally distributed, radiation arms of the two dipoles are respectively composed of a vertical line and a horizontal line and jointly form a cross-shaped line, the tail ends of the vertical line and the horizontal line are connected through an arc line, and a plurality of sections of bent lines are arranged in the middle of the arc line; and the feed balun is of an orthogonal structure, the bottom of the feed balun is connected with a feed network, and the top of the feed balun is connected with the radiator. The invention also provides a base station antenna. The base station antennais formed by nesting and inserting a plurality of low-frequency radiation units into the middles of a plurality of high-frequency radiation units. Therefore, the low-frequency radiation unit has a filtering function, the influence of the low-frequency radiation unit on the high-frequency radiation performance can be effectively reduced when the high-frequency antenna and the low-frequency antennaare nested to form an array, and the miniaturization of the antenna size can be realized.

The invention discloses a low-frequency oscillator unit and an antenna, the low-frequency oscillator unit comprises two oscillator sheets which are orthogonally plugged, a base plate and a radiation sheet, the radiation sheet comprises a first oscillator arm, a second oscillator arm, a third oscillator arm and a fourth oscillator arm, and a first oscillator arm pair and a second oscillator arm pair are orthogonally and symmetrically distributed; and each of the first oscillator arm, the second oscillator arm, the third oscillator arm and the fourth oscillator arm comprises a plurality of wide line segments. Every two adjacent wide line segments in the same oscillator arm are connected through a bending line. The first oscillator arm, the second oscillator arm, the third oscillator arm and the fourth oscillator arm are all oval, the long axis of the first oscillator arm and the long axis of the fourth oscillator arm are both provided with balance wires, and a plurality of open-circuit lines which are connected in parallel are distributed on the balance wires; one end of the open-circuit line is connected with the balance lead; and the other end of the open-circuit line is in an open-circuit state. According to the invention, the low-frequency oscillator unit disclosed by the invention is suitable for 5G communication and can be widely applied to the technical field of wireless communication.

The invention provides a micro dual-circular-polarization antenna based on high low frequency multiplexing and aims to solve a technical problem of relatively large volume of a U/S wave band dual-circular-polarization antenna in the prior art. The micro dual-circular-polarization antenna comprises a thin metal plate, a first medium plate, 2*2 high frequency radiators, a bottom plate, four parasitic branches, a director and second and third medium plates, wherein each high frequency radiator comprises a high frequency radiation unit, a medium sleeve and a reflection plate, the first medium plate and the 2*2 high frequency radiators are fixed on the upper surface of the thin metal plate, the bottom plate is arranged below the thin metal plate through a supporting device, the second medium plate and the four 90-DEG rotary symmetrical gamma-shaped parasitic branches are fixed on the upper surface of the bottom plate, the third medium plate is fixed on the lower surface of the bottom plate, and the director is fixed at a top end of the gamma-shaped parasitic branches through an insulation supporting column. The micro dual-circular-polarization antenna is advantaged in that the volume is small, dual-circular-polarization characteristics can be realized, and the micro dual-circular-polarization antenna can be applied to signal reception and transmission of satellite communication shipborne systems.

The invention provides a dual-polarization radiation apparatus. The dual-polarization radiation apparatus comprises a metal reflective plate, an insulating dielectric and at least one dual-polarization vibrator, wherein the insulating dielectric and the dual-polarization vibrator are positioned on the same side of the metal reflective plate; each dual-polarization vibrator comprises a plurality of radiation arms; the insulating dielectric is long-strip-shaped, and the insulating dielectric and the radiation arms are all arranged above the metal reflective plate; and the distance between the insulating dielectric and the metal reflective plate is less than that between the radiation arms and the metal reflective plate. By virtue of the dual-polarization radiation apparatus disclosed by the invention, the resonance length and balun height of the radiation arms of the dual-polarization vibrator can be improved equivalently, so as to realize small-cross-section and low-profile design of the dual-polarization radiation apparatus. Correspondingly, the invention also provides an antenna, wherein the antenna adopts the dual-polarization radiation apparatus, so that the antenna is small in size and convenient to install. In addition, the invention also provides a base station adopting the antenna.

The invention discloses an integrally packaged ultra-thin flexible antenna loaded with an AMC structure. The antenna comprises a monopole antenna, an AMC structure and an intermediate substrate, wherein the monopole antenna comprises a first radiation unit, a first floor, a microstrip feed line and a first base; the AMC structure comprises a second radiation unit, a second base and a second floor;the first floor and the second radiation unit are respectively bonded on both sides of the intermediate substrate; the front surface of the first substrate is printed with the first radiation unit and the microstrip feed line, and the back surface is printed with the first floor; the first radiation unit and the microstrip feed line are connected; the bottom edge of the microstrip feed line is connected to the bottom edge of the first base; the bottom edge of the first floor and the bottom edge of the first base are connected and collinear; the front side of the second base is printed with the second radiation unit, and the back side is printed with the second floor; and the bottom edge of the second radiation unit and the bottom edge of the second base are connected and collinear. The AMC structure is used as the backplane of the omnidirectional radiation monopole antenna, and its in-phase reflection phase characteristics are used to keep the antenna low profile, increase the radiation toward the surface of the human body, and improve the radiation gain and efficiency.

The invention discloses a miniaturized conformal antenna. The interior of a metal cavity is used for installing an internal module. A flexible printed board and an outer surface of the metal cavity are installed in a conformal manner. Microstrip patch antennas are fixedly connected with the flexible printed board and are at one side of the flexible printed circuit board far away from the metal cavity, and the plurality of microstrip patch antennas enclose the flexible printed board. One end of a feed network is electrically connected with each microstrip patch antenna, the other end of the feed network passes into the metal cavity and is electrically connected with an internal module, and the feed network and a radiation surface of the flexible printed board are in an integrated coplanar design. Therefore, a sensor network node can effectively utilize a space structure, the influence of the internal module on the antenna radiation performance is reduced by using the shielding effect ofthe metal cavity, and the influence on the performance of a whole machine is reduced.

The invention provides a shell assembly, an antenna assembly and electronic equipment. The shell assembly comprises a dielectric substrate and a wave-transparent structure, wherein the dielectric substrate has a first equivalent wave impedance for a radio frequency signal of a preset frequency band, a difference value between the first equivalent wave impedance and the equivalent wave impedance ofthe free space is a first difference value, the wave-transparent structure is carried by the dielectric substrate and at least partially covers a part of the dielectric substrate, the shell assemblyhas second equivalent wave impedance for the radio frequency signal of the preset frequency band in an area corresponding to the wave-transparent structure, the difference value between the second equivalent wave impedance and the wave impedance of the free space is a second difference value, and the second difference value is smaller than the first difference value. When the shell assembly is applied to the electronic equipment, the influence of the shell assembly on the radiation performance of an antenna module arranged in the electronic equipment can be reduced, so that the communication performance of the electronic equipment is improved.

The invention relates to a non-contact variable capacitor-loaded frequency-tunable microstrip patch antenna. The microstrip patch antenna comprises a bottom substrate, a microstrip patch resonator anda microstrip feeder line, wherein the microstrip patch resonator and the microstrip feeder line are arranged on the upper surface and the lower surface of the bottom substrate respectively; the microstrip patch resonator comprises a metal reflection floor, a middle substrate, a top substrate and microstrip patches which are sequentially stacked from bottom to top; a pair of microstrip lines for frequency tuning is arranged between the middle substrate and the top substrate; the microstrip lines for frequency tuning are overlapped with the microstrip patches in a non-contact mode across the top substrate; and the outer ends of the microstrip lines for frequency tuning are electrically connected with the inner ends of variable capacitors loaded on the upper surface of the top substrate, andthe outer ends of the variable capacitors are grounded. The microstrip lines for frequency tuning and the corresponding variable capacitors form a non-contact frequency tuning structure which is usedfor continuously tuning the frequency of the antenna. The invention provides a novel non-contact variable capacitor loading scheme for the first time to design the frequency-reconfigurable microstrippatch antenna working under the main mode TM10.

The invention belongs to the technical field of wireless communication, provides a fractal structure on-chip antenna applied to a CMOS process, and the antenna is used for solving the problems of low gain and low efficiency of the existing millimeter wave frequency band on-chip antenna. The on-chip antenna provided by the invention has a fractal structure, has the characteristic of wide bandwidth, and is suitable for signal transmission of multiple frequency bands; meanwhile, an artificial magnetic conductor structure loaded under the fractal antenna can realize total reflection of electromagnetic waves, so that the loss of the electromagnetic waves in the silicon substrate with low resistance and high dielectric constant is reduced, and the gain of the antenna is increased; a dielectric resonator loaded on the passivation layer can gather electromagnetic waves upwards, so that the loss of the substrate is reduced, the directivity of antenna radiation is improved, and the antenna gain is improved. In conclusion, the invention provides the fractal structure on-chip antenna which is based on the CMOS technology, is applied to the millimeter wave frequency band and is loaded with the artificial magnetic conductor and the dielectric resonator at the same time, and the gain and the working bandwidth of the antenna can be remarkably improved.

A wearable device includes a dial extending a shaft; two watch hand elements coupled to the shaft and configured to rotate 360 degrees in a plane about the shaft; an antenna element coupled to the shaft and configured to rotate 360 degrees in the same plane about the shaft; and a matching circuit matching with the antenna element.

The invention relates to a frequency tunable microstrip patch resonator loaded by a non-contact variable capacitor non-contact variable capacitor. The resonator comprises a metal ground, a bottom substrate, a top substrate and a microstrip patch which are sequentially stacked from bottom to top, and a pair of symmetrical microstrip lines for frequency tuning arranged along the central line of themicrostrip patch is arranged between the bottom substrate and the top substrate. The microstrip lines for frequency tuning are overlapped with the microstrip patch in a non-contact manner across the top substrate, the outer end of the microstrip line for frequency tuning is electrically connected with the first end of a variable capacitor loaded on the upper surface of the top substrate, and the second end of the variable capacitor is electrically connected with the metal ground. The microstrip line for frequency tuning and the variable capacitor form a non-contact frequency tuning structure,and the non-contact frequency tuning structure is used for continuously tuning the frequency of the resonator. The invention provides a novel non-contact variable capacitor loading scheme for the first time to design a frequency-reconfigurable microstrip patch resonator working under a main mode TM10.

The invention provides a shell assembly, an antenna assembly and electronic equipment. The shell assembly comprises a substrate and a wave-transparent structure. The substrate has a first transmittance for an electromagnetic wave signal of a preset frequency band. The substrate comprises a first part and a second part. The first part includes a first surface having a curvature of a first curvature. The second part comprises a second surface with the curvature being the second curvature, and the second curvature is not equal to the first curvature. The wave-transparent structure is borne on thesubstrate, the shell assembly has a second transmittance for the electromagnetic wave signals of the preset frequency band in the area corresponding to the wave-transparent structure, and the secondtransmittance is larger than the first transmittance. The wave-transparent structure comprises a first sub-wave-transparent structure and a second sub-wave-transparent structure. The first sub-wave-transparent structure is attached to the first surface. The second sub-wave-transparent structure is attached to the second surface, and at least one of the size, the shape and the thickness of the second sub-wave-transparent structure is different from that of the first sub-wave-transparent structure.