661 results about "Slot antenna" patented technology

A differential feed waveguide slot antenna array disclosed by the present invention comprises a radiation layer and a feed layer, the radiation layer is provided with a first antenna radiation slot group and a second antenna radiation slot group, the feed layer comprises a one-to-two power divider, a first feed line and a second feed line, one end of the first feed line is connected with a first output end of the one-to-two power divider, and the other end of the first feed line is connected with a second output end of the one-to-two power divider. One end of the second feeder line is connected with the second output end of the one-to-two power divider, the other end of the first feeder line is connected with the other end of the second feeder line, and the length difference X exists between the first feeder line and the second feeder line, so that the phase difference between a first signal passing through the first feeder line and a second signal passing through the second feeder line is 180 degrees; the first antenna radiation slot group is arranged corresponding to the first feeder line, and the second antenna radiation slot group is arranged corresponding to the second feeder line. The antenna has the advantages of wide working bandwidth, low side lobe and low cost.

The invention discloses a reflective slot antenna for RFID tag inventory, and relates to the technical field of antenna design, the slot antenna design scheme of the invention greatly enhances the directionality and signal coverage capability of the antenna through a phase control algorithm and slot arrangement optimization, and improves the signal coverage capability of the antenna through adjusting the phase difference and the slot spacing. The radiation intensity of the antenna in multiple directions is enhanced, blind areas are effectively reduced, multi-path interference is effectively identified and suppressed through a multi-path signal processing algorithm and an LMS minimum mean square error algorithm, and the antenna can automatically adjust the phase of reflection current and filter reflection signals, so that the signal quality of a complex reflection environment is guaranteed, and the signal quality is improved. In addition, an adaptive array antenna system and a beam forming technology are introduced, so that the antenna can dynamically adjust the phase and amplitude of an array unit according to real-time data fed back by the RFID tag, thereby forming a directional beam, concentrating energy to a specific direction, and improving the recognition precision in a specific area.

The embodiment of the invention provides a ka and k waveband dual-frequency dual-polarization broadband wide-angle scanning common-aperture antenna unit and an antenna array, and relates to the technical field of common-aperture antenna arrays, the antenna unit comprises an antenna unit substrate, a low-frequency antenna, a high-frequency antenna and a wide-angle matching layer; the low-frequency antenna and the high-frequency antenna are arranged in the antenna unit substrate, and the high-frequency antenna comprises a shielding enclosure frame which is located between the low-frequency antenna and the high-frequency horizontal polarization L-shaped feed probe and between the low-frequency antenna and the high-frequency vertical polarization L-shaped feed probe; the wide-angle matching layer is arranged on the front surface of the antenna unit substrate and is positioned above the low-frequency antenna and the high-frequency antenna; wherein the low-frequency antenna is an L-shaped probe coupling microstrip patch antenna with a shielding enclosure frame, and the high-frequency antenna is a slot antenna. The antenna is simple in structure, employs a printed board technology, is very low in processing difficulty, is lower in cost, and is easy to be interconnected with rear-end equipment.

The invention discloses an intelligent adaptive metasurface and an electromagnetic regulation and control method. The metasurface unit is of a three-layer composite structure and comprises a programmable phase shifter, a slot antenna and a coupling circuit, and real-time sensing of amplitude and phase information of incident electromagnetic waves and 0-360-degree continuous regulation and control of reflection phases are achieved. The array is composed of 6 * 6 independent control units and supports + / -60-degree beam scanning and high-precision direction of arrival estimation (error lt; 1 degree). Channel state information is obtained through a coupling link, a coding matrix is dynamically optimized in combination with a closed-loop feedback algorithm, and the communication quality is improved in a complex environment. Experiments show that the metasurface respectively brings 16dB, 19dB and 8dB channel gains in ideal, non-line-of-sight and real scenes, the problems that a traditional metasurface is poor in environmental adaptability and insufficient in phase precision are solved, and an innovative hardware platform is provided for 6G communication, an intelligent reflecting surface and a radar sensing system.

The invention belongs to the technical field of antennas, and particularly relates to a low-sidelobe X-waveband waveguide slot array antenna. The antenna comprises an antenna array plane, the antenna array plane comprises a plurality of sub-array antennas which are arranged in parallel at equal intervals, each sub-array antenna is a waveguide slot array antenna, each waveguide slot array antenna is externally connected with a TR assembly, and the center-to-center distance d1 between every two adjacent waveguide slot antennas is 16mm; according to the technical requirements, horizontal polarization is achieved in the mode that an inclined slot is formed in the narrow side of a rectangular waveguide, finally, the design of the low-sidelobe horizontal polarization waveguide slot traveling wave array antenna is achieved, and the sidelobe level in the antenna working frequency range averagely meets the design target that the sidelobe level of a transmitting pitching face is lower than-12dB, the sidelobe level of a receiving pitching face is lower than-25dB, and the sidelobe level of the receiving pitching face is lower than-25dB. According to the invention, the side lobe level of the azimuth plane is lower than-25dB, the normal transmitting gain is greater than 35dBi (full-band), the receiving gain is greater than 33.5 dBi, and the antenna has the advantages of low side lobe, high gain and narrow beam, and is suitable for being applied to an X-band radar communication system.

The utility model discloses a waveguide slot antenna comprising a feed port layer, a slow wave line layer and a radiation slot layer which are stacked in sequence. The feed port layer is provided with a feed port used for inputting electromagnetic waves or outputting electromagnetic waves. The end face of one end, facing the feed port layer, of the slow wave line layer is provided with a snakelike slow wave cavity, one end of the snakelike slow wave cavity is provided with a feed signal end, and the feed signal end is correspondingly connected with the feed port. A plurality of waveguide radiation slots are formed in the snake-shaped channel of the snake-shaped slow wave cavity at intervals; a plurality of radiation cavity units in one-to-one correspondence with the waveguide radiation slots are arranged on the end face of one end, facing the slow wave line layer, of the radiation slot layer at intervals, a plurality of radiation slots are arranged in the radiation cavity units at intervals, and signal connecting ends correspondingly coupled with the waveguide radiation slots are arranged at one ends of the radiation cavity units. According to the utility model, the scanning angle of the antenna can be increased to adapt to application occasions with high antenna scanning angle requirements, and the adaptability is high.

The invention relates to the technical field of household appliances, and discloses a clothes dryer which comprises a shell, a clothes dryer body and a clothes dryer body. The clothes drying box is arranged in the containing cavity, a clothes drying cavity is formed in the clothes drying box, and an air inlet and an air outlet are formed in the clothes drying box so as to communicate the containing cavity with the clothes drying cavity; the heat pump module is arranged in the containing cavity and used for heating air conveyed to the clothes drying cavity; the radio frequency module is arranged in the accommodating cavity, the radio frequency module comprises a magnetron and a waveguide slot antenna array, the magnetron is arranged in the accommodating cavity below the clothes drying box, the waveguide slot antenna array is arranged on the side wall of the clothes drying box, and the magnetron is connected with the input end of the waveguide slot antenna array. Mutual adaptation between uneven electromagnetic wave radiation and uneven water distribution of the clothes to be dried can be achieved, and the clothes drying uniformity can be improved. The invention further discloses a control method for the clothes dryer.

Embodiments of this application provide an antenna structure. The antenna structure includes a first radiation stub, a second radiation stub, and a first feed. The first radiation stub includes two grounding points and a first feed point. The first feed point is located between the two grounding points, and the two grounding points are configured for grounding. The first radiation stub is spaced apart from a ground connected to the two grounding points to form a slot, and the first radiation stub forms a slot antenna. The second radiation stub has a gap with the first radiation stub, and the second radiation stub is coupled to the first radiation stub through the gap. The first feed is electrically connected to the first feed point of the first radiation stub and is configured to provide a first feed signal for the first radiation stub by using the first feed point.

A device may include a mainboard including a grounding unit, a radio-frequency circuit, and a conductor, wherein an annular radiation slot is provided on the conductor. The device may include a feeding terminal having a first end connected to a feeding point of the conductor and a second end electrically connected to the radio-frequency circuit of the mainboard. The device may include a first inductor having a first end connected to a grounding point of the conductor and a second end electrically connected to the grounding unit of the mainboard. The device may include a first capacitor provided in the annular radiation slot and having two electrodes respectively connected to both ends of the annular radiation slot in a width direction of the annular radiation slot, located between the feeding terminal and the first inductor in a length direction of the annular radiation slot.

The invention discloses a broadband omnidirectional conformal long-slot antenna and a wireless communication device, the antenna comprises two antenna units which are arranged up and down, and the two antenna units relatively rotate around the center at an angle of 45 degrees. Each antenna unit comprises an annular metal resonant cavity, a first annular dielectric substrate, a metal ring, a second annular dielectric substrate and a microstrip metal feeder which are sequentially arranged from inside to outside, and a circle of annular long seam is formed in the center of the metal ring. According to the antenna, the slot is used for providing low-frequency resonance points, the microstrip open-circuit line is used for providing high-frequency resonance points, the antenna achieves double working frequency bands, the working bandwidth of the antenna is greatly expanded through the design, the problem that the bandwidth of the antenna is insufficient is solved, the antenna is designed in a circular ring shape, a double-layer directional diagram compensation design method is applied, and the antenna performance is improved. Therefore, the antenna can achieve the omnidirectional radiation performance, and the problem that a traditional cavity-backed slot antenna is difficult to radiate in an omnidirectional manner is solved.

The invention discloses a microwave tube type reaction device which comprises a reactor shell and a plurality of horizontal metal partition plates uniformly arranged in the reactor shell at intervals, the metal partition plates divide the internal space of the reactor shell into a plurality of same reaction cavities, a plurality of reaction tubes and metal tubes are arranged in the reactor shell in an array mode, and the metal tubes are arranged among the reaction tubes; waveguides are symmetrically arranged on the two opposite sides of each reaction cavity, the waveguides are symmetrically distributed on the two sides, the waveguides on the same side are connected with one waveguide slot antenna, the microwave generators are connected with the waveguide slot antennas through circulators, and all slots in the waveguide slot antennas are communicated with the corresponding reaction cavities through the waveguides. Uniform temperature distribution in the large-size microwave tubular reactor is realized by utilizing the waveguide slot antenna, the metal partition plate, the metal tube and the like, the amplification effect is reduced, and numerical amplification of the microwave tubular reactor is facilitated.

A device housing is provided for wirelessly receiving electric power in order to supply electric power to a device with an excellent power-receiving efficiency, while suppressing an increase in its size as a whole. Also, a device having the same device housing and a device housing for constituting a main body of a device which is a sensor or an actuator are provided. The device housing is provided with a power-receiving device for mainly generating an electric field or a magnetic field for performing wireless power supply. The power-receiving device includes at least one of a dipole antenna, a slot antenna, a monopole antenna, a chip antenna and an inverted-F antenna. The device housing has a size in a three-dimensional space, and expansion of its size in the three-dimensional space due to the provision of the power-receiving devices is substantially limited to one axis direction (X-axis direction) at most.

A single feed antenna design is conducted on a radiator of a specific shape (for example, a strip radiator or a slot radiator) to excite a plurality of antenna modes. For example, performing a feed design on a strip radiator may excite a CM wire antenna mode and a DM wire antenna mode. For another example, performing a feed design on a slot radiator may feed a CM slot antenna mode and a DM slot antenna mode. The antenna design may be used to cover a plurality of frequency bands when an antenna is miniaturized.

The invention discloses a double-frequency slot antenna structure with a back cavity and a design method, which are used for an omnidirectional communication system. The antenna can work in two frequency bands, the antenna comprises a disc metal cavity, eight arc-shaped gaps above the cavity, and some metal columns and metal sheets in the middle of the cavity, and the antenna feeds the gaps from the center of the bottom of the cavity in a coaxial probe feeding mode; a filtering mechanism is formed through a metal column and a metal sheet in the middle of the cavity, and high frequency is blocked through low frequency, so that high-band radiation waves are limited in the small cavity in the middle and then are radiated out from four first arc-shaped gaps above, and low-band radiation waves are radiated out from four second arc-shaped gaps above the whole disc cavity after passing through the filtering mechanism; high-frequency energy and low-frequency energy can be separated, different cavity sizes are formed at different frequencies, and working frequency radiation is controlled by combining the length of the gap.

The invention provides a structure multiplexing ultra-wideband dual-polarization low-profile high-efficiency one-dimensional phased-array antenna, and belongs to the technical field of antenna engineering. The antenna is formed by one-dimensional periodic arrangement of a plurality of antenna units. The antenna unit comprises a bottom structure, and two horizontal polarized antennas and a vertical polarized antenna which are vertically arranged above the bottom structure; wherein the bottom structure is used for feeding the horizontal polarized antenna and the vertical polarized antenna; the horizontally-polarized antennas are arranged on the two sides of the vertically-polarized antenna in a mirror symmetry mode, the horizontally-polarized antennas and the vertically-polarized antenna are arranged in an orthogonal mode, and the horizontally-polarized antennas are achieved through slot radiators to serve as ideal conductor boundaries of the vertically-polarized antenna. According to the invention, based on the idea of structure multiplexing, the slot antenna is multiplexed as an ideal electric conductor to recover the equivalent boundary condition of an infinite area array, so that the bandwidth expansion is realized; meanwhile, the fishbone-shaped slot antenna and the folding dipole are designed, so that the dual-polarization bandwidth of the antenna is further improved, and the profile height of the array is reduced.

The utility model relates to a dual-frequency polarization reconfigurable circular slot antenna, which belongs to the field of communication and comprises a dielectric substrate, a radiation patch arranged on the upper surface of the dielectric substrate and a grounding plate arranged on the lower surface of the dielectric substrate. The radiation patch comprises two metal strips which are perpendicular to each other, a concentric annular gap is formed in the grounding plate, each metal strip is coupled with the concentric annular gap to excite two resonant frequencies, a circular gap is formed in the concentric annular gap, the concentric annular gap and the circular gap are mutually coupled, and the two resonant frequencies are excited. And dual-band polarization reconfiguration is realized. According to the utility model, the reconstruction of the polarization modes of 2.5 GHz and 5.8 GHz frequency bands is realized, through the symmetrical design of the structure, the rotation directions of circular polarization radiation are different during the feeding of different single ports, the miniaturization requirement is met, the size is small, the profile is thin, the manufacturing process is simple, and the cost is low.

The invention discloses a waveguide slot antenna and a control method thereof. The antenna comprises a feed port layer, a slow wave line layer and a radiation slot layer which are stacked in sequence, the feed port layer is provided with a feed port used for inputting electromagnetic waves or outputting electromagnetic waves. The end face of one end, facing the feed port layer, of the slow wave line layer is provided with a snakelike slow wave cavity, one end of the snakelike slow wave cavity is provided with a feed signal end, and the feed signal end is correspondingly connected with the feed port. A plurality of waveguide radiation slots are formed in the snake-shaped channel of the snake-shaped slow wave cavity at intervals; a plurality of radiation cavity units in one-to-one correspondence with the waveguide radiation slots are arranged on the end face of one end, facing the slow wave line layer, of the radiation slot layer at intervals, a plurality of radiation slots are arranged in the radiation cavity units at intervals, and signal connecting ends correspondingly coupled with the waveguide radiation slots are arranged at one ends of the radiation cavity units. According to the invention, the scanning angle of the antenna can be improved to adapt to application occasions with high antenna scanning angle requirements.

The invention provides a 45-degree polarized waveguide slot antenna, and the antenna comprises a plurality of metal layers which are seamlessly attached, and the metal layers are a radiation layer, a slot layer, and a feed waveguide layer. The radiation layer is provided with a pair of C-shaped metal walls, and the bottom of the radiation layer is provided with a plurality of horn mouths. The slit layer is provided with a plurality of inclined slits which are arranged and distributed in parallel, the included angle between the longitudinal center line of each inclined slit and the longitudinal center line of the slit layer is 45 degrees, and the plurality of inclined slits correspond to the plurality of horn mouths one by one; the feed waveguide layer is provided with a ridge waveguide resonant cavity, the inner side of the cavity side wall is provided with a plurality of convex blocks, and the center of the bottom of the feed waveguide layer is provided with periodic concave-convex ridges; one end of the narrow side of the cavity side wall is provided with a rectangular feed waveguide port. Through the antenna with the multilayer metallization structure, the radiation performance of large broadband, high gain, low side lobe and low cross polarization is realized, and the antenna can be widely applied to communication systems such as millimeter wave satellites, radars and the like.

The invention discloses a dual-frequency dual-ring planar slot antenna applied to a WLAN (Wireless Local Area Network). The dual-frequency dual-ring planar slot antenna comprises a dielectric substrate and a planar metal sheet, the planar metal sheet is printed on the surface of the dielectric substrate, a long gap is horizontally formed in the middle of the planar metal sheet, a small annular gap and a large annular gap are formed in the planar metal sheet at intervals from inside to outside with the center of the long gap as the center of a circle, and a feeding point is arranged at the position, close to the center, of the long gap. According to the invention, the dual-band design requirement of the WLAN is realized through slotting modes in different forms, and the frequency coverage is 2400-2500MHz amp; and the antenna has relatively good port impedance, so that the wide impedance bandwidth of the antenna can be realized. The antenna is good in performance, easy to process and easy to install and conform.

The invention discloses a double-frequency dual-mode fabric antenna with enhanced edge emission gain. The double-frequency dual-mode fabric antenna comprises a radiation patch, an antenna dielectric substrate and an antenna floor, the radiation patch is attached to the upper surface of the antenna dielectric substrate, and the antenna floor is attached to the lower surface of the antenna dielectric substrate; wherein a symmetrical side of the radiation patch is respectively provided with a gain improving gap, the other side of the radiation patch extends outwards to form a microstrip feeder line, impedance matching gaps are respectively arranged between two sides of the microstrip feeder line and the radiation patch, and the antenna adopts a scheme of a microstrip line side-fed square microstrip patch antenna. The flexible wearable dual-frequency dual-mode antenna is simple in structure, meets the requirements of an on-body communication mode, is very small in-band gain fluctuation, is obviously higher than an existing flexible wearable dual-frequency dual-mode antenna in edge emission gain under the condition of guaranteeing the simple structure, and effectively improves the communication quality of an in-body communication mode.

The invention discloses a self-packaging filtering slot antenna based on a folded substrate integrated waveguide cavity. The self-packaging filtering slot antenna comprises a first metal layer, a first dielectric substrate, a second metal layer, a second dielectric substrate, a third metal layer, a third dielectric substrate, a fourth metal layer, a fourth dielectric substrate and a fifth metal layer, the first metal layer is arranged on the upper surface of the first dielectric substrate; the second metal layer is arranged on the upper surface of the second dielectric substrate; the third metal layer is arranged on the upper surface of the third dielectric substrate; and the fourth metal layer and the fifth metal layer are respectively arranged on the upper surface and the lower surface of the fourth dielectric substrate. The novel filtering antenna provided by the invention has the characteristics of miniaturization, high selectivity, wide stop band and self-packaging, and can be well applied to the field of wireless communication systems.

The invention relates to the technical field of antennas, and discloses an antenna module and electronic equipment, and the antenna module comprises a first antenna, a second antenna disposed outside a resonant cavity, and a feed circuit. The first antenna is a cavity slot antenna formed by a slot structure arranged on a resonant cavity enclosed by the metal conductive shell and the resonant cavity. The second antenna comprises at least one radiation branch knot. And the feed circuit is used for feeding excitation current into the first antenna and the second antenna so as to transmit and receive wireless signals of different frequency bands by using the radiation slot and the radiation branch knot formed by the slot structure.

The present invention discloses a waveguide slot antenna with a horn cavity slot, which belongs to the technical field of high-power microwave antennas. The antenna includes a radiation cavity, a feeding waveguide, and a radome, wherein the radiation cavity is composed of a plurality of slotted waveguides. The slotted waveguide has a plurality of slots with horn cavities, and the slots with horn cavities are parallel to the center line of the wide side of the slotted waveguide; a feeding slot is provided at the bottom of each slotted waveguide, and the feeding slot is a rectangular wide slot, located at the center of the slotted waveguide and passing through the feeding waveguide, and the feeding slot is perpendicular to the slot with the horn cavity. The present invention can effectively reduce the maximum electric field strength inside the antenna and improve the power capacity of the antenna, and at the same time has the advantages of low profile, light weight, easy processing and low cost.

The present subject matter provides an RFID device configured to provide improved antenna gain and directivity. The RFID device includes an antenna, a metamaterial (MTM) array, and a substrate. The substrate includes a first surface and a second surface, and the antenna includes a bottom surface and a top surface. The bottom surface of the antenna and the MTM array are formed on the first surface of the substrate. The antenna and the MTM array are separated by a gap. The antenna is formed from a first conductive material defining an area surrounded by a first perimeter. The antenna includes a nesting slot. The MTM array is formed from a second conductive material defining an area surrounded by a second perimeter.

A vehicle includes a window with an antenna assembly. The window includes a glass surface, a metal frame, and a set of defroster wires. A top defroster wire and a top edge of the metal frame define an antenna region. The antenna assembly includes a slot antenna disposed within the antenna region. The slot antenna is disposed on a glass surface of the window in a visible region of the window with a top side located proximate a horizontal cover line of the metal frame. A feed point is located in a central area of the slot antenna, and a first slot and a second slot of the slot antenna intersect at the feed point. A feed line extends from the feed point through a separation gap between the metal frame and the glass surface to connect the slot antenna to a communication device.

A plasma processing apparatus includes: a processing container; a resonator configured to resonate electromagnetic waves to be supplied; a slot antenna connected to the resonator; and a transmission window configured to transmit the electromagnetic waves radiated from the slot antenna and supply the electromagnetic waves into the processing container, wherein the resonator includes: an input port including an inner shaft and an outer cylinder; an output port including an inner shaft and an outer cylinder; a power supply fin connecting the inner shaft of the input port and the inner shaft of the output port and provided in the resonator; and a ground fin connected to the outer cylinder of the input port and the outer cylinder of the output port at a same potential and provided to protrude within the resonator so as to be inserted between fins of the power supply fin.

A behind-the-ear type hearing aid (10) is provided. The hearing aid (10) comprises: a housing (12) adapted to be worn behind an ear of a user; a microphone (14) arranged in the housing (12) and configured to receive sound; a processing circuit (16) arranged in the housing (12) and configured to convert the received sound into a hearing loss compensated signal; a receiver (18) arranged outside of the housing (12), in or near an ear canal of the user, the receiver (18) being configured to receive the hearing loss compensated signal and output said signal as audio; and a slot antenna (20) arranged in the housing (12), the slot antenna (20) comprising: an antenna plane (22) extending in a plane with a normal direction being between 45°-135° to an ear-to-ear axis of the user when the hearing aid (10) is worn; and a slot (24) in the antenna plane (22) shaped as a loop. A method (100) for manufacturing such a hearing aid is further provided.

An electronic device comprises a housing, a printed circuit board, a first slot antenna, and a second slot antenna. The housing includes a side wall, a bezel coupled to the side wall, and a bottom plate coupled to the side wall. The printed circuit board is positioned within the housing between the bezel and the bottom plate, and at least partially forms a ground plane. The first slot antenna transmits and / or receives a first wireless signal having a first frequency and is formed in part by a first portion of a circumference of the bezel, and the ground plane of the printed circuit board. The second slot antenna transmits and / or receives a second wireless signal having a second frequency and is formed in part by a first portion of a circumference of the bottom plate, and the ground plane of the printed circuit board.

The invention discloses a compact cross orthogonal scanning multilayer millimeter wave multi-beam array antenna, which comprises a dual-port common-cavity Rotmann lens feed network structure and a common-caliber antenna layer, and is characterized in that the dual-port common-cavity Rotmann lens feed network structure is located at a bottom layer, and the common-caliber antenna layer is located above the common-cavity Rotmann lens feed network structure; the common-aperture antenna layer comprises a slot antenna layer and a patch antenna layer, the slot antenna layer is located at the bottom layer, and the patch antenna layer is located above the slot antenna layer. According to the invention, the return loss of each port is reduced, the reflection of incident waves at the edge ports is reduced, the isolation degree between the ports and between the two sub-lenses is increased, and the working efficiency is improved.

The invention provides a substrate integrated notch mirror image dielectric waveguide cross slot antenna, which belongs to the field of waveguides and antennae, and comprises a dielectric radiator, a metal column, and a first metal layer, a dielectric substrate and a second metal layer which are arranged in a laminated manner, the dielectric radiator is embedded in the dielectric substrate, the lower surface of the dielectric radiator is tightly attached to the second metal layer, and the upper surface of the dielectric radiator is not covered; a plurality of metal columns penetrate through the dielectric substrate and are arranged on the periphery of the dielectric radiator in an array mode, a plurality of cross-shaped gaps are formed in the dielectric radiator, an electromagnetic signal is input from an input port in the side face of the dielectric substrate and is radiated outwards from the cross-shaped gaps, the notch mirror image structure is used in antenna design, the radiation efficiency of the antenna is improved, and the antenna radiation efficiency is improved. The cross-shaped gap can better control the radiation mode of electromagnetic waves, and more concentrated radiation with high directivity is formed, so that the performance of the antenna is improved.