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35 results about "Lens antennas" patented technology

Lens antenna with electronic beam steering capabilities

The invention discloses a lens antenna with high directivity intended for use in radio-relay communication systems, said antenna providing the capability of electronic steering of the main radiation pattern beam by switching between horn antenna elements placed on a plane focal surface of the lens. Electronic beam steering allows antenna to automatically adjust the beam direction during initial alignment of transmitting and receiving antennas and in case of small antenna orientation changes observed due to the influence of different reasons (wind, vibrations, compression and / or extension of portions of the supporting structures with the temperature changes, etc.). The technical result of the invention is the increase of the antenna directivity with simultaneously provided capability of scanning the beam in a continuous angle range and also the increase of the antenna radiation efficiency and, consequently, the increase of the lens antenna gain. This result is achieved by the implementation of horn antenna elements with optimized geometry.
Owner:OBSHCHESTVO S OGRANICHENNOJ OTVETSTVENNOSTYU RADIO GIGABIT

Lens antenna

Disclosed is a lens antenna comprising a dielectric lens consisting of a collimating part and an extension part, and an antenna element. The extension part of the lens comprises a substantially flat surface crossed by the axis of the collimating part, and the antenna element is rigidly fixed on the surface. The antenna element is formed by a hollow waveguide and comprises a dielectric insert with one end thereof adjacent to said surface; the size of the radiating opening of the waveguide is determined by the predefined width of the main beam and by side lobe levels of the radiation pattern of the lens antenna. The technical result of the invention is an increase in realized gain value due to the use of a waveguide antenna element with a dielectric insert, which provides impedance matching in a wide frequency bandwidth. The present invention can be used in radio-relay point-to-point communication systems, e.g. for forming backhaul networks of cellular mobile communication, in car radars and other radars, in microwave RF tags, in local and personal communication systems, in satellite and intersatellite communication systems, etc.
Owner:OBSHCHESTVO S OGRANICHENNOJ OTVETSTVENNOSTYU RADIO GIGABIT

Millimeter-wave 360-DEG omnidirectional-scan dielectric cylinder lens antenna

The invention discloses a millimeter-wave 360-DEG omnidirectional-scan dielectric cylinder lens antenna comprising three dielectric cylinder lenses, three feed source antenna arrays with scan ranges of 120 DEG and four round metal discs. One of the three dielectric cylinder lenses is respectively coaxially arranged among the four round metal discs, one of the three feed source antenna arrays is respectively arranged between the edges of two adjacent round metal discs, the difference between two of the three feed source antenna arrays on a horizontal projection surface is 120 DEG, and a phase central plane of each feed source antenna array is superposed with a focal plane of each dielectric cylinder lens. The invention realizes 360-DEG omnidirectional scan in the horizontal direction; the three dielectric cylinder lens antennas are partitioned by parallel round metal disc-shaped plates, and the scan of each homogeneous dielectric cylinder lens is not interfered by the other two lenses,thus the scanning beam of each layer of cylinder lens antenna is totally consistent; and the millimeter-wave 360-DEG omnidirectional-scan dielectric cylinder lens antenna can be conveniently connected with a printed integrated circuit. The millimeter-wave 360-DEG omnidirectional-scan dielectric cylinder lens antenna is applied to the fields of space flight communication, satellite communication, electronic countermeasure and the like.
Owner:ZHEJIANG UNIV

System and method for free-space method dielectric constant measurement through addition of polarization grid

InactiveCN107202942AReduce the impactReduce back-and-forth reflectionsTesting dielectric strengthDielectricComputational physics
The present invention discloses a system and method for free-space method dielectric constant measurement through addition of a polarization grid, belonging to the electromagnetic field and microwave technology field. On the basis of the current free-space method measurement system, a polarization grid mesh is added next to one side of a sample to be measured, a changing curve of reflection parameters and transmission parameters of the network with the angle of the polarization grid mesh is measured to distinguish the electromagnetic wave penetrating into the electromagnetic wave of the grid mesh from the invariable electromagnetic waves of other paths; and the changing signals carry the dielectric information of the sample to be measured, and the coefficients such as the amplitude in the changing curve are employed to perform evolution of the dielectric constant of the sample to be measured. In a stable environment, the changing of the network parameters with the polarization grid angle is not sensitive to the electromagnetic environment, and therefore the influences of the electromagnetic wave diffraction and diffraction in the experiment environment is effectively reduced. Besides, focusing lens antennas employ lossy material polylactic acid (PLA) to effectively reduce the multiple reflection of electromagnetic wave between the antennas to allow an experiment result to be more accurate.
Owner:BEIHANG UNIV

Antennas having lenses formed of lightweight dielectric materials and related dielectric materials

The present invention provides lens antennas that include a plurality of radiating elements and a lens positioned to receive electromagnetic radiation from at least one of the radiating elements, thelens comprising a composite dielectric material. The composite dielectric material comprises expandable gas-filled microspheres that are mixed with an inert binder, dielectric support materials such as foamed microspheres and particles of conductive material that are mixed together.
Owner:COMMSCOPE TECH LLC

Ultra-wideband lens antenna based on periodic semi-high pins

The invention belongs to the technical field of lens antennas, and discloses an ultra-wideband lens antenna based on periodic semi-height pins. The lens antenna comprises a lens body, a feed source, supporting blocks and screws; the lens body is composed of two layers of metal plates with the periodic translation symmetric half-height pins, the sides, provided with the pins, on the metal plates are arranged oppositely, and an air gap is reserved between the sides; the pins on the upper metal plate horizontally move by half of a unit period in the periodical distribution direction relative to the pins on the lower metal plate; the feed source is a rectangular waveguide and is located on one side of the lens body, and the height of the narrow edge at the tail end of the waveguide is the sumof the height of the edge pin of the lens body and the height of the air gap; the supporting blocks are located at the edges of the two sides of the lens body in the direction perpendicular to the radiation direction of the lens body; the screws are installed on the two sides of the feed source and the non-radiation edge of the lens body. The lens antenna can achieve high gain in an ultra-wide frequency band range, is easy to process and low in cost, and can be applied to the field of wireless communication such as satellite communication.
Owner:XIDIAN UNIV

Hemispherical lens feed source transmitting-receiving integrated crescent lens antenna

The invention discloses a hemispherical lens feed source transmitting-receiving integrated crescent lens antenna, which comprises a crescent lens, a lens extension layer, a lens support, a base, a receiving feed source antenna array and a transmitting feed source antenna array, and is characterized in that the crescent lens, the lens extension layer and the lens support are formed by a medium, the lens support is a hollow cylinder, and the base is a cylinder; the upper surface of the base is provided with the receiving feed source antenna array and the transmitting feed source antenna array, a one-dimensional scanning array or a two-dimensional scanning array is formed according to an arrangement mode of the receiving feed source antenna array and the transmitting feed source antenna array, and both the receiving feed source antenna array and the transmitting feed source antenna array comprise a plurality of hemispherical lens antennas. The hemispherical lens feed source transmitting-receiving integrated crescent lens antenna integrates a transmitting antenna and a receiving antenna, and is good in beam consistency, high in aperture efficiency, low in sidelobe, good in directivity, light in weight, easy to be integrated with a planar circuit and small in overall longitudinal dimension.
Owner:吴锡东

Antennas having lenses formed of lightweight dielectric materials and related dielectric materials

The present invention provides lens antennas that include a plurality of radiating elements and a lens positioned to receive electromagnetic radiation from at least one of the radiating elements, thelens comprising a composite dielectric material. The composite dielectric material comprises expandable gas-filled microspheres that are mixed with an inert binder, dielectric support materials such asfoamed microspheres and particles of conductive material that are mixed together.
Owner:COMMSCOPE TECH LLC

Lens antenna

A lens antenna including a lens body and / or a matching layer. In the lens antenna, lens body may be formed by a material containing thermoplastic elastomers. When a matching layer is formed on the surface of the lens body, at least one of the lens body and the matching layer is formed by a material containing thermoplastic elastomers. The use of thermoplastic elastomers in the lens body and / or the matching layer assist in reducing the formation of cracks therein.
Owner:MURATA MFG CO LTD

Integrated lens antennas for multi-pixel receivers for planetary and astronomical instruments

Methods and apparatus for integrating lens antennas for receivers are disclosed. A method of fabricating a lens in accordance with one or more embodiments of the present invention comprises integrating lens material with a dielectric material and flowing the lens material into a desired lens shape. An integrated lens antenna in accordance with one or more embodiments of the present invention comprises a dielectric material, a waveguide feed, coupled to the dielectric material through a leaky wave cavity, and a lens, coupled to the dielectric material opposite the leaky wave cavity, wherein material is first deposited onto the dielectric material, flowed into a desired lens shape and the desired lens shape is transferred to the dielectric material.
Owner:CALIFORNIA INST OF TECH

Luneberg lens antenna dielectric material as well as preparation method and application thereof

ActiveCN112662060APrecise control of cell sizePrecise control of distribution densityBulk chemical productionAntennasDielectricPolymer science
The invention belongs to the field of lens antennas, and discloses a luneberg lens antenna dielectric material, and a preparation method and an application thereof, the luneberg lens antenna dielectric material comprises a polymer microcellular foaming coiled material with a cell diameter of 10-50 [mu] m; wherein the polymer is at least one selected from polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyurethane and polycarbonate. According to the invention, the polymer coiled material is used as a raw material, and the pore foam size and distribution density of the microcellular foaming polymer can be accurately controlled by adjusting the pressure of an autoclave and the temperature / heating time of a heating pool, so that the dielectric constant with required gradient change is realized; and the luneberg lenses with different diameter requirements can be manufactured by setting the thickness and the number of turns of the coiled material.
Owner:广东盛路通信有限公司

Hemispherical-lens feed source transceiving integrated dual-ellipsoid lens antenna

The invention discloses a hemispherical-lens feed source transceiving integrated dual-ellipsoid lens antenna comprising a dual-ellipsoid lens, a lens extension layer, a lens support, a pedestal, a receiving feed source antenna array, and a transmitting feed source antenna array. The dual-ellipsoid lens, the lens extension layer, and the lens support are formed by media. The lens support is a hollow cylindroid body; and the pedestal is also a cylindroid body. The receiving feed source antenna array and the transmitting feed source antenna array are arranged on the upper surface of the pedestal. A one-dimensional or two-dimensional scanning array is formed by a distribution mode of the receiving feed source antenna array and the transmitting feed source antenna array. Each of the receiving feed source antenna array and the transmitting feed source antenna array includes a plurality of hemispherical-lens antennas. According to the invention, the antenna has advantages of capability of transmitting and receiving antenna integration, high design freedom, good beam consistency, high caliber efficiency, low sidelobe, high directivity, light weight, capability of integration with a planar circuit, and small overall longitudinal dimension.
Owner:ZHEJIANG UNIV

Anti-time-varying beam sequence number modulation method suitable for broadband large-scale millimeter wave system

ActiveCN111525946AGood resistance to time variationSignificant sparsenessSpatial transmit diversityMulti-frequency code systemsFrequency spectrumCarrier signal
The invention discloses an anti-time-varying beam sequence number modulation method suitable for a broadband large-scale millimeter wave system. A pre-compensation auxiliary beam sequence number modulation system is designed and comprises a beam selection module, a transmitting end modulator, a transmitting end pre-compensation module and a receiving end demodulator, wherein the transmitting end and the receiving end of the system are respectively provided with Nt-dimensional and Nr-dimensional lens antennas, and the number of radio frequency chains is far less than the dimension of the antennas, and the radio frequency chain is connected with the antenna through a selection network. The method comprises the steps: determining a sequence number modulated beam set; mapping the serial numbermodulation symbol at the subcarrier into a symbol of quadrature amplitude modulation or phase offset modulation, and performing calculating to obtain a radio frequency link input signal through the serial number modulation symbol; and obtaining a demodulation signal at the subcarrier to realize demodulation of the receiving end. By adopting the technical scheme provided by the invention, the complexity of serial number modulation design can be effectively reduced, the corresponding serial number modulation has good time-varying resistance, and the loss of system error code performance and spectral efficiency is avoided.
Owner:PEKING UNIV

All-metal part Maxwell fisheye lens wide-angle coverage multi-beam antenna

The invention relates to an all-metal part Maxwell fisheye lens wide-angle coverage multi-beam antenna, and belongs to the technical field of lens antennas. According to the multi-beam lens antenna, a complete two-dimensional Maxwell fisheye lens is cut along a straight line, and a feed source array arranged along a straight line is adopted; port switching and frequency scanning are combined, and the antenna comprises an upper layer metal cover plate A, a lower layer metal cover plate B, a six-port network upper half part C1, a six-port network upper half part C2, a six-port network lower half part D, a metal ring E1 and a metal ring E2. The beam pointing directions of the pitching surface are respectively 20 degrees and 0 degree, and the working frequency range is 33 to 36 GHz. The beam coverage rate is improved in a limited space; meanwhile, feed sources are arranged along a straight line and are easily integrated in the system; cutting is carried out, so that the size of the lens is reduced; by utilizing the characteristics of the cut Maxwell fisheye lens, azimuth angle scanning exceeding + / -90 degrees is realized; return loss and isolation are good, and radiation efficiency is high.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Wide-angle scanning lens terminal antenna and scanning mode thereof

The invention relates to the field of lens antennas, and discloses a wide-angle scanning lens terminal antenna which comprises a total array composed of a plurality of array elements of the same structure, each array element comprises a lens and a phase control feed source array which are in one-to-one correspondence from top to bottom, each phase control feed source array is composed of 2N sub-arrays, each sub-array is composed of N * N antenna units, and N belongs to [2, + infinity]. The invention further discloses a scanning mode of the wide-angle scanning lens terminal antenna. According to the invention, high gain and large-angle scanning performance of the terminal antenna is realized through the plano-convex lens antenna structure based on the phased feed source, and compared with a traditional phased-array antenna and a traditional lens antenna, the terminal antenna has the effects of high flexibility, high gain, large scanning angle and the like.
Owner:重庆两江卫星移动通信有限公司

Millimeter-wave 360-DEG omnidirectional-scan dielectric cylinder lens antenna

The invention discloses a millimeter-wave 360-DEG omnidirectional-scan dielectric cylinder lens antenna comprising three dielectric cylinder lenses, three feed source antenna arrays with scan ranges of 120 DEG and four round metal discs. One of the three dielectric cylinder lenses is respectively coaxially arranged among the four round metal discs, one of the three feed source antenna arrays is respectively arranged between the edges of two adjacent round metal discs, the difference between two of the three feed source antenna arrays on a horizontal projection surface is 120 DEG, and a phase central plane of each feed source antenna array is superposed with a focal plane of each dielectric cylinder lens. The invention realizes 360-DEG omnidirectional scan in the horizontal direction; the three dielectric cylinder lens antennas are partitioned by parallel round metal disc-shaped plates, and the scan of each homogeneous dielectric cylinder lens is not interfered by the other two lenses,thus the scanning beam of each layer of cylinder lens antenna is totally consistent; and the millimeter-wave 360-DEG omnidirectional-scan dielectric cylinder lens antenna can be conveniently connected with a printed integrated circuit. The millimeter-wave 360-DEG omnidirectional-scan dielectric cylinder lens antenna is applied to the fields of space flight communication, satellite communication, electronic countermeasure and the like.
Owner:ZHEJIANG UNIV

3-d focus-steering lens antenna

PendingUS20210384638A1Fast imagingUndesired interferenceWaveguide hornsLight beamMechanical engineering
The present invention relates to a novel lens antenna with a 3D near-field focus-steering capability that operates at gigahertz and terahertz frequencies. The novel antenna includes a pair of discrete dielectric lenses fed by a stationary horn source. In-plane synchronous counter-rotation and co-rotation of the lens pair steers its near-field focus radially and azimuthally, respectively, while linear translation of the upper lens moves the focal point longitudinally. The steering focus beam enables fast imaging. In imaging applications, the radiated beam from the novel lens antenna focused in the target area can reduce undesired interference from neighboring structures and increase the system dynamic range and signal-to-noise ratio.
Owner:CITY UNIVERSITY OF HONG KONG

Wide-Angle Scanning Anamorphic Hemispherical Dielectric Lens Antenna Based on Array Feed

The invention discloses a deformed hemispherical dielectric lens antenna based on array feeding for multi-beam directional communication and beam scanning. Its basic structure includes 1×8 square microstrip patch feed array, layered deformed hemispherical dielectric lens and antenna support firmware. The anamorphic lens antenna uses the method of ray optics to design the inner and outer layers of the anamorphic lens. With the form of array feeding, it effectively solves the shortcomings of the traditional hemispherical lens with small scanning angle and low EIRP, and is helpful for anamorphic hemispheres. Lens antennas are better used in long-distance multi-beam directional communication and beam scanning, low-profile usage scenarios and corresponding market demands. Using today's mature 3D printing technology, deformable lenses and antenna support firmware can be easily processed, which solves the ubiquitous engineering realization problems of lens antennas. Based on the basic structure of the present invention, other specific implementations of the present invention can be formed by reasonably changing the size and deformation of the filling medium and the form of the feed source.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

An all-metal partial Maxwell fisheye lens wide-angle coverage multi-beam antenna

The invention relates to an all-metal partial Maxwell fisheye lens wide-angle coverage multi-beam antenna, which belongs to the technical field of lens antennas. The multi-beam lens antenna cuts a complete two-dimensional Maxwell fisheye lens along a straight line and adopts a feed source array arranged along a straight line, and combines port switching and frequency switching to realize beam wide-angle scanning. There are two assembly modes for the antenna structure. The first assembly mode uses the upper metal cover, the lower metal cover, the upper half of the boss type six-port network, the lower half of the six-port network and the inclined metal ring for installation and connection; the second assembly mode uses the lower metal cover The board, the upper half of the inclined six-port network, the lower half of the six-port network and the flat metal ring are installed and connected. In the two assembly modes, the elevation beam pointing is 0° and 20° respectively, the azimuth beam scanning range exceeds ±90°, and the working frequency range is 33‑36GHz. In a limited space, the beam coverage is improved; at the same time, the feed is arranged in a straight line, which is easy to integrate; the volume is reduced by cutting the lens; it is made of all metal, and the radiation efficiency is high.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Hemispherical Lens Feed Transceiver Integrated Crescent Lens Antenna

The invention discloses a hemispherical lens feed source transmitting-receiving integrated crescent lens antenna, which comprises a crescent lens, a lens extension layer, a lens support, a base, a receiving feed source antenna array and a transmitting feed source antenna array, and is characterized in that the crescent lens, the lens extension layer and the lens support are formed by a medium, the lens support is a hollow cylinder, and the base is a cylinder; the upper surface of the base is provided with the receiving feed source antenna array and the transmitting feed source antenna array, a one-dimensional scanning array or a two-dimensional scanning array is formed according to an arrangement mode of the receiving feed source antenna array and the transmitting feed source antenna array, and both the receiving feed source antenna array and the transmitting feed source antenna array comprise a plurality of hemispherical lens antennas. The hemispherical lens feed source transmitting-receiving integrated crescent lens antenna integrates a transmitting antenna and a receiving antenna, and is good in beam consistency, high in aperture efficiency, low in sidelobe, good in directivity, light in weight, easy to be integrated with a planar circuit and small in overall longitudinal dimension.
Owner:吴锡东

Ultra-wideband planar focusing lens antenna and design and imaging method thereof

PendingCN114400458AWith ultra-wideband characteristicsAvoid disadvantages such as high loss and narrow bandwidthSimultaneous aerial operationsUltra-widebandHigh resolution imaging
The invention relates to an ultra-wideband planar focusing lens antenna and a design and imaging method thereof, and belongs to the field of lens antennas and optical imaging. The method comprises the following steps: performing quasi-conformal transformation on a ball luneberg lens, performing reasonable discretization on a transformed non-uniform dielectric constant, analyzing the influence of different discretization conditions on a focal spot and an angular resolution in a broadband, determining the optimal discretization of the dielectric constant, and realizing high-resolution imaging on a focal plane in the broadband. The system has high imaging resolution of real-time imaging in a wide-angle range, when plane waves in different directions are incident in an imaging range of + / -30 degrees, the size consistency of 3dB focal spots imaged on a focal plane is good, and a real-time imaging structure is simple.
Owner:XIDIAN UNIV

Array lenses, lens antennas and electronics

The present application relates to an array lens, a lens antenna and an electronic device. The array lens includes at least one dielectric layer; at least two layers of array structure, the dielectric layer and the array structure are alternately stacked along the first direction; each layer The array structure includes at least two hollow grooves arranged in an array, each of the hollow grooves is provided with a split ring piece, and at least two of the split ring pieces in the same relative position of the at least two array structures are positioned on the first side. Upward coaxial arrangement; wherein, in the same array structure, at least two of the split rings have gradually changing opening sizes in the array direction, which can compensate the phase distribution of different frequency bands, and can converge electromagnetic waves, which can make the The focal plane of the array lens remains unchanged in a wider frequency range, which greatly reduces the drop in off-focus beam gain, greatly increases the scanning angle of the lens antenna, and has a large coverage.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Visible light communication meniscus lens antenna for miniaturization of transceiver and its design method

ActiveCN112910555BAchieving Parallel High-Speed ​​Visible Light CommunicationReduce usageClose-range type systemsOptical elementsTransceiverLight spot
The present invention proposes a visible light communication concave-convex lens antenna and its design method for the miniaturization of the receiving end. By selecting the lens combination and spatial arrangement with appropriate parameters, a clearly separated light spot of reduced size is formed at the receiving end, and then at the receiving end The lens is used to collect and receive the light paths of each color separately, so as to realize parallel high-speed visible light communication. The advantages of the present invention are as follows: firstly, by using the concavo-convex cascaded optical antenna system, the receiving end can form a separated light spot with reduced size, which can effectively realize the miniaturization of the system. Second, parallel communication is realized by independently receiving separated light spots, which avoids the use of dichroic mirrors and optical filters, and effectively reduces the complexity of system implementation and deployment costs. Third, by selecting a lens with reasonable parameters and a spatial layout, we can adjust the imaging size ratio and the specific imaging position, that is, the antenna system can adapt to different application scenarios and has good robustness.
Owner:UNIV OF SCI & TECH OF CHINA

Lenses, lens antennas and electronic equipment

The application relates to a lens, a lens antenna and an electronic device. The lens includes a substrate layer and a conductive layer; the conductive layer is attached to the substrate layer, the conductive layer is provided with an array unit and a pattern unit, and the array unit includes a plurality of hollow slots and A plurality of conductive sheets, a plurality of hollow grooves are opened in the conductive layer and arranged at intervals along the first direction, and each hollow groove is provided with a conductive sheet; the graphic unit is obtained by arraying the array units toward both sides along the second direction, and the second direction perpendicular to the first direction; wherein, the conductive sheet includes a first folded piece and a second folded piece, the end of the first folded piece is connected with the end of the second folded piece and forms an included angle, and the first folded piece and the second folded piece are connected The included angle formed by the flaps has a gradient law in the first direction. In the present application, the phase delay is realized by controlling the opening angle of the first folded sheet and the second folded sheet, so that the electromagnetic waves radiated by the feed that deviates far from the focus can also be well converged, and the decrease of the gain of the off-focus beam is greatly reduced. The scanning angle of the lens antenna is greatly increased.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Electronic equipment

An embodiment of the present application provides an electronic device, including: a control circuit, a camera body, a light-transmitting lens, and an antenna structure; the camera body includes a base and a lens, the lens is arranged on the base, and the camera body and the The control circuit is electrically connected; the light-transmitting lens corresponds to the lens, and the light-transmitting lens covers the lens; the antenna structure is arranged between the camera body and the light-transmitting lens, and the antenna structure is made of a transparent material The antenna structure is electrically connected with the control circuit to send and receive signals. The embodiment of the present application can improve the signal strength of the electronic device.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Dielectric Lenses, Lens Antennas and Electronic Devices

The present application relates to a dielectric lens, a lens antenna and an electronic device. The dielectric lens includes a first conductive plate and a second conductive plate arranged in parallel with the first conductive plate; a dielectric layer includes a top layer and a bottom layer arranged opposite to each other, The top layer is attached to the first conductive plate, and the bottom layer is attached to the second conductive plate; wherein, the top layer is a first smooth curved surface, and the dielectric layer includes a first gradient area, and the first A gradation area protrudes toward the first conductive plate, and the thickness of the gradation area decreases symmetrically from the center of the first gradation area to the edges on both sides of the first gradation area; the thickness For the distance between the first conductive plate and the second conductive plate, the continuous change of the equivalent refractive index can be achieved, and the radiation efficiency is high.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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