50 results about "Dielectric resonator antenna" patented technology

The application discloses a compact dielectric resonator antenna module, which comprises a substrate assembly and a dielectric resonator arranged on the substrate assembly. The dielectric resonator comprises a connecting part and four isosceles trapezoidal columns. The height of the connecting part is less than the height of the isosceles trapezoidal columns. The four isosceles trapezoidal columns are evenly distributed around the connecting part. The short bottom surface of the isosceles trapezoidal column is connected with the connecting part. The long bottom surface of the isosceles trapezoidal column has a compensation part extending away from the connecting part. The connecting part, the isosceles trapezoidal column and the compensation part are integrally formed into an integrated structure. The dielectric resonator antenna module has a compact structure and a small overall volume. The dielectric resonator only needs to be installed once as a whole, thereby reducing the alignment error generated in the installation process and facilitating the guarantee of the antenna performance. The height difference between the connecting part and the isosceles trapezoidal column in the height direction achieves a decoupling effect to some extent, thereby reducing the coupling between the isosceles trapezoidal columns. The dielectric resonator antenna module can cover the N258 frequency band in 5G.

A radio frequency coil device and array for ultrahigh field magnetic resonance imaging comprises a coaxial dipole antenna and a dielectric resonator antenna which work in a collaborative excitation mode, and the coaxial dipole antenna is in a circular ring shape or a rectangular ring shape and is provided with a first radio frequency port; the dielectric resonator antenna comprises a dielectric resonator and a coupling coil, the dielectric resonator, the coupling coil and the coaxial dipole antenna are sequentially distributed in parallel at intervals along the Y axis, the coupling coil is provided with a second radio frequency port, and the dielectric resonator forms a resonant cavity and realizes energy coupling with the coaxial dipole antenna through the coupling coil; excitation signals are respectively applied to the first radio frequency port and the second radio frequency port, so that the coaxial dipole antenna and the dielectric resonator antenna respectively generate orthogonal electromagnetic field distribution, and low-channel coupling is realized. Through the collaborative excitation mode and the orthogonal electromagnetic field distribution design, coupling between channels is effectively reduced, the B1 + field uniformity is improved, meanwhile, the peak SAR is reduced, and the imaging efficiency and safety are improved.

The invention provides a metal patch loaded miniaturized dielectric resonator antenna for a base station, and relates to the technical field of wireless communication, a specific parasitic metal patch is introduced at the bottom of a dielectric resonator, the limitation that the traditional design only depends on geometric dimension to adjust the frequency is broken through, the TM12 high-order mode frequency is obviously pulled down to be close to a fundamental mode TM10 and fusion is realized, and the antenna has the advantages of being simple in structure and convenient to use. On the premise that the size of the antenna is not increased, the working bandwidth is expanded to 3.4-4.0 GHz. Through the structural design, a cross-shaped groove structure is loaded in the central area of the dielectric resonator, a current path of a TM20 parasitic mode is cut off accurately, directional diagram distortion and cross polarization interference caused by the mode are effectively suppressed, and it is ensured that the antenna has stable radiation performance. Therefore, the antenna has excellent broadband and radiation characteristics, can still keep compact physical size, low profile structure and simple processing technology, and meets the urgent demand of a microwave frequency band wireless communication terminal on high performance and miniaturization antennas.

A substrate-integrated dielectric resonator, which includes a first substrate layer having a first dielectric constant, and a plurality of metallic patches on a first side of the first substrate layer. The plurality of metallic patches is separated from each other, and is shorted to ground. A dielectric resonator antenna incorporating such a resonator is also described. The DRA has a low profile with an enhanced gain. The DRA can be easily fabricated using low-cost PCB technology. By adding shorted metallic patches to the DR without increasing the antenna size, the gain of DRA is obviously increased.

The application provides a wideband co-transmit-receive antenna array for X-band airborne SAR, and belongs to the technical field of antenna control, and a specific scheme comprises a rectangular dielectric resonator antenna array, a dielectric substrate, a double-layer feed network, a cross-shaped slotted floor and a nylon support column; the rectangular dielectric resonator antenna array is a 4*4 array and comprises four groups of antenna subarrays with the same size and the same spacing; the dielectric substrate comprises a first dielectric substrate, a second dielectric substrate and a third dielectric substrate, and the first dielectric substrate is located below the rectangular dielectric resonator antenna array; the structure of the antenna array realizes co-transmit-receive of the same right-handed circular polarization, and the isolation of the transmit-receive ports reaches a performance of >30dB.

This invention relates to the field of smart electrical appliance technology, and particularly discloses a dielectric resonator antenna and a smart electrical appliance, including a substrate, a resonator, a feeding structure, and a power divider assembly. The feeding structure includes a first feeding microstrip, a second feeding microstrip, a third feeding microstrip, a first probe, a second probe, and a third probe. The first probe is connected to the first, second, and third feeding microstrips; the second probe is connected to the first, second, and third feeding microstrips; and the third probe is connected to the first, second, and third feeding microstrips. The power divider assembly includes a first power divider, a second power divider, and a third power divider. The first power divider is connected to the first, second, and third probes; the second power divider is connected to the first, second, and third probes; and the third power divider is connected to the first, second, and third probes. Through the above method, this invention can reduce costs.

The application discloses a compact dual-polarized end-fire dielectric resonator antenna for a millimeter wave terminal, and particularly relates to the technical field of millimeter wave communication, and solves the technical problem that although in the millimeter wave frequency band, a dielectric resonator antenna has the advantages of small volume, high design freedom and low loss; however, the current millimeter wave end-fire dielectric resonator antenna is limited to single-polarized radiation; and the dielectric resonator antenna cannot be fully utilized while high integration is achieved; the technical scheme is that two orthogonal dielectric resonator modes of vertical polarization and horizontal polarization are adopted to work, and two polarizations share the same structure; the application can realize dual-polarized coverage, end-fire beam scanning in the millimeter wave frequency band, and has the excellent characteristics of low profile and small planar size.

The invention relates to the technical field of antennas, in particular to a millimeter wave double-frequency arc-shaped circularly polarized dielectric resonator antenna, which comprises a rectangular grounding plate, two groups of arc-shaped dielectric blocks, a plurality of layers of metal rings and a feed probe, and adopts rotary feed to enable the phase difference of feed ports to be 90 degrees in sequence to form good double-frequency circularly polarized performance. The rectangular grounding plate has the same length and width, the arc-shaped dielectric blocks surround the periphery of the double-layer metal ring, are perpendicular to the rectangular grounding plate and coincide with the radial centers of the two groups of arc-shaped dielectric blocks, the height and the thickness of the inner-layer metal ring are lower than those of the outer-layer metal ring, good matching is formed, and the feed probe is connected with the starting side wall surfaces of the arc-shaped dielectric blocks and the grounding plate through welding. The structure can realize a dual-band circular polarization characteristic in a millimeter wave frequency band, is simple in structure and easy to process and form an array on the premise of meeting other performance parameters, and is stable and reliable in structure due to the adoption of the medium material loading radiator, and can adapt to various bad environments.

The embodiment of the present application relates to the technical field of antenna, and discloses a dual-frequency dielectric resonant antenna, which comprises a substrate, a feeding unit and an antenna unit; the substrate is provided with a plurality of feeding slots; the feeding unit is arranged on the substrate and is coupled with the feeding slots; the antenna unit comprises a plurality of dielectric resonators, the plurality of dielectric resonators are arranged on the substrate, and the plurality of dielectric resonators are sequentially connected in the same direction to form an integrated antenna unit, and one dielectric resonator is connected with one feeding slot.The embodiment of the present application sequentially connects the plurality of dielectric resonators in the same direction to form an integrated antenna unit, so that the integrated plurality of dielectric resonators only need to be bonded and fixed once, the installation of the antenna unit can be completed, the installation process is simplified, the installation alignment error caused by multiple installations of the antenna unit is reduced, and the performance simulation error and actual error of the antenna unit are avoided from being increased.

The invention discloses a four-port antenna system based on multiplexing of a mutual coupling removing structure, which is characterized in that on the premise of realizing excellent circular polarization mutual coupling removing performance of a dielectric resonator antenna, a part of mutual coupling removing structure of a 1 * 2 circular polarization antenna array is multiplexed as an additional monopole antenna, and a feed network is introduced for effective excitation, so that the coupling removing performance of the dielectric resonator antenna is improved; therefore, two additional monopole antennas are obtained, the monopole antennas and an original circularly polarized antenna can work independently, and the antennas have good isolation characteristics. Based on this, a novel four-port antenna system is realized on the premise of keeping the aperture of the original 1 * 2 circularly polarized antenna array unchanged, the four-port antenna system comprises two circularly polarized antennas and two monopole antennas, and the design has better system capacity or more communication functions compared with the existing circularly polarized cross-coupling removal antenna design.

The present disclosure relates to electronic devices with curved dielectric resonator antennas. An electronic device is provided that can be provided with a phased antenna array having a curved dielectric resonant element. The curved dielectric resonant element can have a first section, a second section that is not parallel to the first section, and an angled surface that couples the first section to the second section. One or more feed probes can be coupled to the first section to excite the dielectric resonant element. A reflector can be provided on the angled surface to direct electromagnetic energy from the first section to the second section, and vice versa. The curved dielectric resonant element can exhibit a smaller overall height than a dielectric resonator having a straight column of dielectric material, thereby allowing a reduction in the thickness of the electronic device. Despite the reduction in overall height, the angled surface and the reflector can optimize the radio frequency performance of the antenna.

The invention discloses a high-gain dielectric resonator antenna unit and related electronic equipment, and the high-gain dielectric resonator antenna unit comprises a dielectric substrate, a dielectric resonator, a feed structure and a director. Wherein the feed structure is coupled with the dielectric resonator to feed the dielectric resonator; the dielectric resonator is columnar, the director is attached to the upper surface of the dielectric resonator, and the lower surface of the dielectric resonator is fixedly connected with the dielectric substrate; the director is an annular metal sheet, and the outer diameter of the director is consistent with the outer diameter of the dielectric resonator. Through the dual effects of the boundary constraint effect and the phase guiding effect, the gain of the dielectric resonator antenna unit is improved, the performance of a directional diagram is improved, the original effective bandwidth is kept, meanwhile, the sectional area and the overall size of the antenna cannot be remarkably increased, the requirement for miniaturization of the antenna can be met, and the antenna is suitable for large-scale popularization and application. And the method can well adapt to various application scenes with limited space.

The application discloses a medium resonator antenna with adjustable beam deflection angle and electronic equipment, which comprises a substrate, a medium resonator and a containing part. The medium resonator comprises a first medium resonator and at least one second medium resonator. The first medium resonator is in the shape of a cuboid, and the second medium resonator is in the shape of a right triangular prism. The shape of the at least one second medium resonator after being sequentially stacked is a right triangular prism with a bottom surface being a right triangle. The containing part is provided with a containing cavity with an opening. The first medium resonator is arranged on the substrate. The containing part is located on one side of the first medium resonator, and the opening of the containing cavity faces the first medium resonator. Each second medium resonator is arranged in the containing cavity in a slidable manner. When the at least one second medium resonator sequentially slides out of the containing cavity, the at least one second medium resonator is sequentially stacked on the side of the first medium resonator away from the substrate. The application can realize flexible adjustment of the beam deflection angle.

A broadband millimeter wave dielectric resonator antenna unit and an array structure composed of the same, the antenna unit layer structure is sequentially from top to bottom a high dielectric constant rectangular dielectric block of top layer, a low dielectric constant dielectric substrate of top layer and a low dielectric constant dielectric substrate of bottom layer. A plurality of air holes are introduced around the dielectric block to make the four modes of the antenna distributed in the millimeter wave frequency range of 21-43.65GHz working frequency band, and better impedance matching is realized in the free space. The lower surface of the top layer dielectric substrate is provided with a metal floor, and a feed gap is etched on the metal floor; the metal floor and the low dielectric constant of the bottom layer are bonded through an adhesive layer, and the lower surface of the bottom layer dielectric substrate is provided with a microstrip line. A 1xN antenna array is composed of a plurality of broadband dielectric resonator antenna units with the same structure. The dielectric resonator antenna array of the application can work in the frequency range of 24-40GHz, and the relative bandwidth is 50%; at the same time, the antenna array can realize a peak gain of 14.75dBi; in addition, the dielectric resonator antenna array has a wide-angle scanning characteristic, and the maximum scanning angle is ±56°.

This invention belongs to the field of microwave antenna and RF front-end circuit technology, specifically relating to a broadband filter dielectric resonator antenna with wide harmonic suppression characteristics and a method for controlling its radiation characteristics. The method includes the following steps: obtaining an initial electromagnetic state parameter set and performing fundamental mode field distribution decoupling calculations; constructing an open-loop feeder partially coupled topology to generate a hybrid broadband response signal set; parsing the passband envelope and attenuation determination to map a folded open-loop resonator to generate lower stopband zeros; determining the harmonic frequency band energy density threshold to trigger a multi-topology notch filter to generate an upper stopband zero array; and compensating for phase group delay and gain flatness to output the converged final radiation state parameters of the antenna. This invention overcomes the problems of multimode interference between the feed network and the radiator, the inability to independently generate stopband radiation zeros, and nonlinear phase group delay shift caused by the lack of distributed notch filter node cooperative configuration.

The invention discloses a welded end-fire dielectric resonator antenna applied to a C-band communication system, and belongs to the technical field of microwave antennas. The antenna comprises a ceramic cylinder, a fastening screw, a dielectric substrate, a radio frequency cable assembly and a metal shell which are connected in sequence. The ceramic cylinder is assembled with the dielectric substrate in a reflow soldering mode, the dielectric substrate is fastened on the metal shell through the fastening screw, the radio frequency cable assembly is fastened on the metal shell through the M5 external thread at the end of the insulator, and meanwhile, the insulator penetrates through the dielectric substrate and goes deep into the ceramic cylinder, so that feeding of the dielectric resonator antenna is achieved. The ceramic cylinder in the dielectric resonator antenna is assembled with the dielectric substrate in a reflow soldering mode, the dielectric resonator antenna is embedded and fastened in the side wall of the object to be detected through the screws, in a working area, the antenna gain is larger than 2.9 dB, the antenna pattern fluctuation is smaller than + / -0.5 dB, and the dielectric resonator antenna has the advantages that the antenna gain is larger than 2.9 dB; and high-efficiency work of the communication system under the high-temperature and high-pressure environment adaptability requirement can be realized.

The invention discloses a broadband circularly polarized dielectric resonator antenna with double-sided beam broadening. The antenna is sequentially provided with a first dielectric block, a first metal layer, a second dielectric block, a metal ground layer, a dielectric substrate and a second metal layer from top to bottom, the first dielectric block is rectangular, the second dielectric block is in a centrosymmetric cross shape, the first metal layer comprises four centrosymmetric rectangular metal patches and a pair of 45-degree oblique symmetric metal strips, a fork-shaped feed groove is etched in the metal ground layer, and the second metal layer is of a linear microstrip feed structure. A signal is coupled to the fork-shaped feed groove through the microstrip feed structure, the laminated dielectric block is excited to generate an orthogonal mode to form right-handed circular polarization, the rectangular metal patch realizes beam broadening, and the metal strip inhibits left-handed circular polarization to broaden the axial ratio bandwidth. The antenna is wide in bandwidth, can achieve double-sided beam broadening, facilitates array scanning, and is suitable for the fields of satellite communication and the like.

A millimeter-wave broadband substrate integrated hybrid dielectric resonator antenna is provided. The hybrid antenna includes: a first dielectric substrate with high dielectric constant, a second dielectric substrate with low dielectric constant, and a third dielectric substrate with low dielectric constant sequentially stacked from top to bottom. The first dielectric substrate and the second dielectric substrate are adhered by a first adhesive sheet; the second dielectric substrate and the third dielectric substrate are adhered by a second adhesive sheet; a middle of a top surface of the second dielectric substrate is printed with a metal ring patch; a top surface of the third dielectric substrate is formed with a metal ground plane, and the metal ground plane is etched with a feed slot; and a bottom surface of the third dielectric substrate is disposed with a microstrip line.

The application provides a millimeter wave dielectric resonator antenna module, which comprises a first dielectric substrate, a second dielectric substrate and a first lattice cylinder located on two sides of the first dielectric substrate respectively, an inter-ridge gap waveguide layer located on one side of the second dielectric substrate, and a second lattice cylinder detachably connected to the first lattice cylinder, wherein the first lattice cylinder and the second lattice cylinder form a completed cylinder, 7 strip-shaped through slots are uniformly arranged on the first lattice cylinder, and 7 strip-shaped blocks are arranged on the second lattice cylinder and are clamped with the corresponding 7 strip-shaped through slots. The millimeter wave dielectric resonator antenna module can switch circular polarization and linear polarization by mounting the second lattice cylinder on the first lattice cylinder or separating the second lattice cylinder from the first lattice cylinder.

The application belongs to the field of wireless communication, and particularly relates to a pattern reconfigurable medium resonant antenna based on reflection grooves, which comprises a medium resonator, a medium substrate, a metal ground, a feeding structure, a cross-shaped groove, two pairs of reflection grooves and a bias network; wherein the medium resonator, the metal ground, the medium substrate and the feeding structure are sequentially arranged from top to bottom, the metal ground is printed on the upper surface of the medium substrate, the feeding structure is printed on the lower surface of the medium substrate, and stable feeding is realized through a gap coupling mode; the cross-shaped groove and the two pairs of reflection grooves are both arranged on the metal ground, the cross-shaped groove is accurately arranged corresponding to the central region of the medium resonator, and the two pairs of reflection grooves are symmetrically arranged at the edge regions of the medium resonator.

The invention relates to the technical field of antennas, in particular to a dielectric resonator antenna and a multimode electromagnetic excitation method, the dielectric resonator antenna comprises a dielectric substrate, a dielectric resonator element and a conductive feed assembly, and one side of the dielectric substrate is provided with a grounding plane; the dielectric resonator element is arranged on the grounding plane; the conductive feed assembly comprises a T-shaped power divider, a 180-degree annular coupler, a feed span bridge, a rectangular groove and a conductive probe; the T-shaped power divider and the 180-degree annular coupler are arranged on one side of the dielectric substrate, the T-shaped power divider is opposite to the grounding plane, and the 180-degree annular coupler is adjacent to the T-shaped power divider; the rectangular groove is arranged at the other side of the dielectric substrate and is arranged at the same side with the grounding plane; the conductive probe is arranged in the center of the dielectric resonator, and the bottom end of the conductive probe penetrates through the dielectric substrate and is connected with the microstrip line on the opposite side of the grounding plane; the dielectric resonator antenna provided by the invention has the characteristics of bandwidth and gain enhancement, and the isolation of four ports is good.

The invention relates to a circularly polarized filtering dielectric resonator antenna array with a folded spiral structure, and belongs to the technical field of antennas. The dielectric resonator antenna array sequentially comprises an antenna unit, an H-shaped microstrip power divider, a dielectric substrate 1, a metal ground 1, a coplanar waveguide structure, a dielectric substrate 2 and a metal ground 2 from top to bottom. The dielectric resonator antenna array is composed of four units; the antenna unit is composed of a folded metal spiral strip and a hollow cylindrical dielectric resonator. A metal spiral strip and a hollow cylindrical dielectric resonator are designed in a nested mode, currents and equivalent magnetic currents which are the same in direction, have the 90-degree phase difference and are equal in amplitude are generated, and therefore the circular polarization radiation function is achieved. And a band-pass filtering function is realized by a feed structure combined by the substrate integrated waveguide cavity and the coplanar waveguide. The bandwidth, gain and axial ratio indexes are suitable for ground equipment in a C-band satellite communication system.

The disclosure relates to a semiconductor packaging device. The semiconductor packaging device comprises a dielectric element, a radiation excitation source comprising a vertical part extending from an end of the dielectric element to an interior of the dielectric element, and the vertical part and the dielectric element jointly form a dielectric resonator antenna. The semiconductor packaging device can reduce the amount of high dielectric constant material, thereby reducing the manufacturing cost of the semiconductor packaging device, and is conducive to improving economic benefits.

The invention provides a dual-frequency dual-polarization common-aperture phased-array antenna unit. The dual-frequency dual-polarization common-aperture phased-array antenna unit comprises a plurality of layers of dielectric substrates, the low-frequency-band dielectric resonator antenna and the four high-frequency-band dielectric resonator antennas are arranged on the multilayer dielectric substrate; wherein the low-frequency-band dielectric resonator antenna and the high-frequency-band dielectric resonator antenna are conformally arranged in the same physical aperture of the multi-layer dielectric substrate, and the low-frequency-band dielectric resonator antenna and the high-frequency-band dielectric resonator antenna are both dual-polarized antennas. According to the invention, the dual-frequency-band simultaneous independent operation and dual-polarization radiation in a compact space are realized, the utilization efficiency of the antenna aperture is obviously improved, the technical bottleneck that the dual polarization and broadband are difficult to realize at the same time in high and low frequency bands in the traditional common-aperture antenna is overcome, and the dual-polarization broadband antenna has the advantages of low loss and high radiation efficiency by means of the characteristics of the dielectric resonator antenna. And a high-performance and high-integration-level miniaturized antenna unit solution is provided for a multifunctional composite phased array radar system.

The invention discloses a directional diagram reconfigurable dielectric resonant antenna based on a complementary source, which belongs to the technical field of wireless communication and comprises a dielectric resonator, a perforated metal ground, a dielectric substrate and a reconfigurable feed network from top to bottom. And the four metal columns are embedded in the dielectric resonator and penetrate through the metal ground to be connected with the feed network. The feed network comprises an input microstrip line, a central circular patch, four orthogonally distributed reconfigurable feed microstrip lines and an open-circuit matching branch, and each branch is connected in series with a PIN diode. By controlling the on-off combination of the five PIN diodes, the dielectric resonator can be excited to generate TEmode equivalent magnetic dipoles in different directions, and the TEmode equivalent magnetic dipoles and the equivalent electric dipoles of the metal columns jointly form a magnetoelectric complementary source, so that eight high-gain wave beam pointing switching at 45-degree intervals is realized in an omnibearing plane. Wherein the matching branch is accessed in a specific state to optimize impedance matching. The antenna has the advantages of compact structure, electric tuning, wide band and multi-beam scanning.

An electronic device may be provided with a phased antenna array and a display cover layer. The phased antenna array may include a probe-fed dielectric resonator antenna. The antenna may include a dielectric resonating element mounted to a flexible printed circuit. A feed probe may be formed from a patch of conductive traces on a sidewall of the resonating element. The feed probe may excite resonant modes of the resonating element. The resonating element may convey corresponding radio-frequency signals through the display cover layer. An additional feed probe may be mounted to an orthogonal sidewall of the resonating element for covering additional polarizations. Probe-fed dielectric resonator antennas for covering different polarizations and frequencies may be interleaved across the phased antenna array.

The invention provides a millimeter wave antenna with a flat-top radiation beam. The millimeter wave antenna comprises an upper-layer insulating dielectric substrate and a lower-layer insulating dielectric substrate which are stacked up and down, a dielectric resonator antenna and an air slot are arranged on the upper-layer insulating dielectric substrate, the air slot is arranged at the periphery of the dielectric resonator antenna, and the dielectric resonator antenna is separated from the outside through the air slot; the lower surface of the upper-layer insulating dielectric substrate is provided with an upper-layer metal grounding plate, and the upper surface of the lower-layer insulating dielectric substrate is provided with a lower-layer metal grounding plate; a rectangular feed slot and two rectangular slots are etched in each of the upper metal grounding plate and the lower metal grounding plate, and the rectangular slots are parallel to the rectangular feed slots; the lower surface of the lower layer insulating medium substrate is provided with a radiation metal patch, and the radiation metal patch is provided with a feed structure. The antenna has the excellent characteristics of simple feeding, compact structure, easy integration, flat-top radiation and the like, and can be widely applied to 5G / B5G millimeter wave communication scenes.

The utility model relates to a dielectric resonator antenna capable of suppressing a high-order mode based on a slotted structure, which comprises a metal grounding plate, a dielectric substrate, a rectangular microstrip line, a rectangular slot and a dielectric resonator, and is characterized in that the metal grounding plate is etched on the upper surface of the dielectric substrate, and the metal grounding plate and the dielectric substrate jointly form a cuboid antenna substrate; a rectangular gap is formed in the center position of the antenna substrate in a penetrating manner; the dielectric resonator is adhered to the center of the upper surface of the antenna substrate; the rectangular microstrip line is etched on the lower surface of the antenna substrate. According to the utility model, through the slotting design on the dielectric resonator antenna, the high-order mode of the antenna can be significantly suppressed, and more input power can be converted into effective radiation, thereby improving the radiation efficiency and gain of the antenna, achieving the effect of improving the signal strength and the transmission distance, and improving the performance of the antenna through the combination of the slotting design and the 3D printing technology. The antenna design is more flexible, and the customized antenna design can be realized.

An electromagnetic, EM, device (1000) is disclosed, configured to operate at a defined center frequency f with a free-space wavelength X. The EM device (1000) comprises a plurality of dielectric resonator antennas, DRAs (3100), which can resonate at the same frequency f, forming a unit cell (3200) observed in a plan view of the EM device (1000) having a total footprint equal to or less than X / 2 in both x and y directions of an orthogonal x-y-z coordinate system, wherein the z direction is a vertical extension direction of each DRA (3100') of the plurality of DRAs (3100), the unit cell (3200) defining a DRA subarray (3000).

The application discloses a kind of wideband low coupling dual-polarized dielectric resonator antennas based on dual-mode resonance and differential feed, including dielectric resonator, two pairs of orthogonal coaxial probe, first Wilkinson power divider, second Wilkinson power divider, first feed port and second feed port;Two pairs of orthogonal coaxial probe are inserted into dielectric resonator;Each pair of coaxial probe is connected with the two output ends of its corresponding Wilkinson power divider;First feed port excites a pair of coaxial probe to dielectric resonator feed by first Wilkinson power divider, and excites the horizontal polarization radiation mode in x-axis direction;Second feed port excites another pair of coaxial probe to dielectric resonator feed by second Wilkinson power divider, and excites the horizontal polarization radiation mode in y-axis direction;The application realizes compact structure, wideband, low coupling dual-polarized radiation mode, and each polarization further increases bandwidth by exciting two frequency points close to resonance mode.