112 results about "Waveguide antennas" patented technology

A short ridge waveguide load is described which absorbs and cancels non-radiated electromagnetic energy in continuous slot or discrete slotted antennas. The load achieves a small physical size by using a resonant structure which includes an absorbing ferrite front section positioned within the interior of the waveguide antenna below the slot and a back section of ferrite material also positioned in the interior of the waveguide antenna. This allows for energy to be radiated from the slot while absorbing and canceling the non-radiated energy using a relatively small size load. In a rectangular ridge waveguide configuration, the front section consists of a pair of posts having a trapezoidal, rectangular or triangular shape.

An antenna system, includes a first substrate, a plurality of chips, and a waveguide antenna element based beam forming phased array. The waveguide antenna element based beam forming phased array has a unitary body that comprises a plurality of radiating waveguide antenna cells in a first layout for millimeter wave communication. Each radiating waveguide antenna cell comprises a plurality of pins that are connected with a body of a corresponding radiating waveguide antenna cell that acts as ground for the plurality of pins. A first end of the plurality of radiating waveguide antenna cells of the waveguide antenna element based beam forming phased array, as the unitary body, in the first layout is mounted on the first substrate. The plurality of chips are electrically connected with the plurality of pins and the ground of each of the plurality of radiating waveguide antenna cells to control beamforming.

The invention discloses a low-hybrid-wave antenna phase compensation method. Three lines of main waveguide of an antenna unit respectively comprises a section of linear transitional waveguide with the gradually-widened narrow edge. A main waveguide is divided into N / 2 sections of branch waveguide through E face branch waveguide of a first phase shift section, then, the main waveguide is divided into N sections of branch waveguide in a second phase shift section, and N is an even number. Phase shifters are arranged through two methods respectively, and the 180-degree phase difference brought by an output port in the middle line of a mode converter and the phase difference caused by the waveguide length difference which is caused by an antenna port arc notch can be eliminated. The low-hybrid-wave antenna phase compensation method can be applied to the design of a Tokamak low-hybrid-wave multi-junction waveguide antenna and an active and passive staggered multi-junction waveguide PAM antenna of a nuclear fusion experimental device and can be used for eliminating various phase differences of the antennas and improving the coupling performance and current drive efficiency of the antennas and plasmas.

An antenna system includes a first substrate, a plurality of chips and a waveguide antenna element based beam forming phased array that includes a plurality of radiating waveguide antenna cells for millimeter wave communication. Each radiating waveguide antenna cell includes a plurality of pins where a first pin is connected with a body of a corresponding radiating waveguide antenna cell and the body corresponds to ground for the pins. The first pin includes a first and a second current path, the first current path being longer than the second current path. A first end of the radiating waveguide antenna cells is mounted on the first substrate, where the plurality of chips are electrically connected with the plurality of pins and the ground of each of the plurality of radiating waveguide antenna cells to control beamforming through a second end of the plurality of radiating waveguide antenna cells for the communication.

The invention belongs to structure improvement of a phased-array antenna module, and particularly relates to a machine-electric-heat-integrated phased-array antenna module. The machine-electric-heat-integrated phased-array antenna module comprises horizontal polarization waveguide antennas, perpendicular polarization waveguide antennas, T / R assemblies, delay lines, a micro-strip power divider, a coupled feeding network, a module-level beam control part and a module-level power source. The horizontal polarization antennas and the perpendicular polarization antennas are arranged on an upper layer and a lower layer in an array mode, wherein the horizontal polarization antennas are located on the upper layer, and the perpendicular polarization antennas are located on the lower layer; the horizontal polarization antennas and the perpendicular polarization antennas are arranged in a staggered mode, grooves with downward openings are surrounded by the bottom walls of the horizontal polarization antennas and the side walls of the perpendicular polarization antennas, and the T / R assemblies are installed in the grooves. According to the machine-electric-heat-integrated phased-array antenna module, an antenna array is composed of the horizontal polarization waveguide antennas and the perpendicular polarization waveguide antennas, the grooves are formed in the back face of the antenna array, the T / R assemblies and the delay lines are put into the grooves, the phased-array antenna module is more compact in structure, and the thickness of the module is also reduced along with the phased-array antenna module structure.

A substrate integrated waveguide fed antenna. The antenna includes an electric dipole, a parasitic patch arrangement operably coupled with the electric dipole, and a feed structure. The feed structure includes a substrate integrated waveguide operably coupled with the electric dipole for exciting the electric dipole. A slotted conductive surface with a slot is arranged between the electric dipole and the feed structure for operably coupling the feed structure with the electric dipole.

A waveguide antenna apparatus includes a lower laminate layer of non-radio-frequency (RF) material and a first layer of conductive material formed on a top surface of the lower laminate layer of non-RF material. A middle layer of non-RF material formed over the first layer of conductive material, the middle layer of non-RF material comprising a waveguide cavity formed through the middle layer of non-RF material, such that air forms a propagation medium for radiation in the waveguide cavity. An upper layer of non-RF material is formed over the middle layer of non-RF material, and a second layer of conductive material is formed on a top surface of the upper layer of non-RF material, the first and second layers of conductive material and the waveguide cavity being part of a waveguide antenna.

The present invention provides a broadband open-ended waveguide antenna, comprising a metal housing and a coaxial waveguide transducer, wherein the metal housing is in a shape of a column with two open ends, the inner cavity of the metal housing is successively a waveguide cavity and a transition cavity along the axial direction, the end, close to the transition cavity, of the metal housing is an installing structure; the coaxial waveguide transducer comprises an L-shaped probe and an RF connector, the L-shaped probe is fixedly connected with one end of the RF connector, the RF connector extends to the outer side of the transition cavity along the axis, so that the other end of the RF connector can be detachably connected with an RF channel. Through adoption of the above technical scheme, the broadband open-ended waveguide antenna which is easy to install and detach is achieved.

A waveguide antenna apparatus is provided including a rectangular waveguide having one end short-circuited by a terminating conductor and another end opened. The rectangular waveguide includes a grounding conductor and a ceiling conductor opposed to each other, and includes two side surface conductors joining the grounding conductor with the ceiling conductor and being opposed to each other. An antenna element has one end and another end, where one end thereof is connected with a position in the ceiling conductor in a vicinity of opened another end of the rectangular waveguide, and another end thereof is connected with a feeding portion located in the grounding conductor. The ceiling conductor includes a removed portion on the side of opened another end of the rectangular waveguide. Then an electromagnetic wave of a fed radio signal is radiated from the removed portion and opened another end of the rectangular waveguide.

An antenna element and a phased array antenna including a plurality of such antenna elements are described. The antenna element includes a waveguide configured for operating in a below-cutoff mode and having a cavity, an exciter configured for exciting the waveguide, and a shield. The shield includes a holder arranged within the cavity, and a front plate mounted on the holder and disposed over at least a part of the exciter.

An antenna system, includes a first substrate, a plurality of chips, and a waveguide antenna element based beam forming phased array. The waveguide antenna element based beam forming phased array has a unitary body that comprises a plurality of radiating waveguide antenna cells in a first layout for millimeter wave communication. Each radiating waveguide antenna cell comprises a plurality of pins that are connected with a body of a corresponding radiating waveguide antenna cell that acts as ground for the plurality of pins. A first end of the plurality of radiating waveguide antenna cells of the waveguide antenna element based beam forming phased array, as the unitary body, in the first layout is mounted on the first substrate. The plurality of chips are electrically connected with the plurality of pins and the ground of each of the plurality of radiating waveguide antenna cells to control beamforming.

A SIW-antenna (10) is disclosed. The SIW-antenna comprises a SIW-structure (20) extending along a horizontal plane for guiding electromagnetic waves along a longitudinal direction from a first feed (26) to a radiation aperture (27), and a parallel plate resonator (30) arranged at the radiation aperture (27), the parallel plate resonator (30) comprising a first flat portion (31) extending in a first plane parallel with the horizontal plane and a second flat portion (32) extending in a second plane parallel with the horizontal plane, wherein the first and second planes are separate from each other. The first flat portion (31) comprises an additional antenna structure (33) being connected to a second feed (36). The second flat portion (32) comprises a plurality of flat tabs (34) extending in the longitudinal direction. The SIW-structure (20) is configured to radiate electromagnetic waves polarized in a first direction. The additional antenna structure (33) is configured to radiate electromagnetic waves polarized in a second direction. The second direction is orthogonal to the first direction. Also an antenna array (200) comprising a plurality of SPAT antennas (10) as well as an electronic device comprising such an antenna array are disclosed.

The invention provides a crack double-waveguide antenna which is characterized in that the crack double-waveguide antenna comprises two waveguide tubes which are fixedly connected through any two sides and are respectively used for transmitting electromagnetic wave signals of different frequencies, and crack sets which are arranged on two adjacent sides of the two waveguide tubes and include a first set of cracks arranged on one side and a second set of cracks arranged on the other side, wherein the polarization direction of the first set of cracks is parallel to the length direction of the waveguide tubes, and the polarization direction of the second set of cracks is perpendicular to the length direction of the waveguide tubes. Because of a high degree of isolation between crack double-waveguide antennas, the channel correlation of signals can approach 0 when the signals are transmitted or receiving using the crack double-waveguide antennas. Therefore, the crack double-waveguide antenna of the invention has the advantages of small signal attenuation and strong anti-interference capability. In addition, the crack double-waveguide antenna can well support the MIMO technology and save space resources.

Apparatus for the identification of articles (5) endowed with device for changing the polarization properties of the radiation, comprising a source (1) of non-randomly polarized microwave radiation, and a detector (3) for detecting the change in polarization properties of the radiation. The microwave radiation may have a first plane of polarization and, in use, the device for changing the plane of polarization properties of radiation may change the first plane of polarization to a second plane of polarization. The detector (3) for detecting the change in polarization properties of radiation may comprise a receiving antenna (4c) connected to suitable microwave detector (3), where the receiving antenna (4c) is arranged to favour reception of radiation having the second plane of polarization. For example, the transmitting (4b) and receiving (4c) antennas may be waveguide antennas. The device for changing the polarization of radiation may comprise a feature having an edge oriented at a nonzero angle to a direction parallel with, or orthogonal to, the first plane of polarization. Typically, the feature may be a linear metallic strip, or may be a feature having a crossed dipole antenna structure. The apparatus may also comprise a device for determining the orientation of the feature or features. The polarization changing device may also comprise a covert structure for preventing the changing of the polarization properties by the polarization changing device in one or more selected location, wherein the arrangement of the one or more selected location provides an identification code.

The invention belongs to the technical field of a common aperture antenna, particularly relates to a rectangular waveguide dual-frequency common aperture antenna based on structure multiplexing and aims to solve problems of large antenna aperture occupation area of a conventional dual frequency common aperture array antenna and insufficient isolation between antennas. The antenna is advantaged inthat a closed structure of a rectangular waveguide is utilized, four rectangular waveguide antennas arranged at intervals of 90-DEG rotation in turn form a side wall of a back cavity type antenna, anda radiation gap is then opened at the center of a back cavity to form a back cavity slot antenna; the rectangular waveguide antennas and the back cavity slot antenna are respectively fed with signalsby an SIW waveguide feed structure and a strip line feed structure, dual-frequency radiation under rectangular waveguide structure multiplexing is realized, the antenna elements have no extra distance, the antenna aperture area is reduced, and the frequency ratio can be adjusted between 1 and 4, moreover, cut-off characteristics of the metal waveguide for the low frequency and orthogonal polarization characteristics of two frequency antennas greatly increase the isolation degree between the antennas, and thereby the higher isolation effect is realized.

An improved Vivaldi antenna enhances the performance over a 2:1 frequency band while occupying a compact format. Taking advantage of a common FR4 material printed circuit board construction, considered features are added which improve the operating bandwidth without adding additional cost. One such embodiment operates over an approximate frequency range of 400 to 900 MHz.

The invention discloses an all-metal multi-beam lens antenna based on quasi-conformal transformation optics. The all-metal multi-beam lens antenna is applied to multi-beam directional communication and beam scanning. A basic structure of the antenna comprises a linear feed source array composed of a plurality of open ridge waveguide antennas, and upper and lower metal plates which are parallel toeach other. The lens antenna is filled with air, a metal cylinder is loaded on the inner side of a metal plate or different equal-height surfaces are etched, equivalent dielectric constant distribution required after the shape of the lens is changed is realized, a series of design and engineering application problems encountered in the process of designing the dielectric luneberg lens antenna working in the 5G millimeter wave frequency band are solved, and the lens antenna can be better applied to use scenes of multi-beam directional communication and beam scanning and corresponding market requirements. Based on the basic structure of the antenna, other specific embodiments of the invention can be formed by reasonably changing the antenna shape, the antenna size and the feed source form.

An embodiment of the present invention provides a multi-polarization substrate integrated waveguide antenna. The multi-polarization substrate integrated waveguide antenna of the present invention has a multi-layer structure, which includes in order from top to bottom: a first metal copper clad layer, a first dielectric layer, a second metal copper clad layer, a second dielectric layer and a third A metal clad copper layer, wherein metallized through holes are provided on the first dielectric layer and the second dielectric layer, and metallized through holes are provided on the first metal clad copper layer and the second metal clad copper layer etch slot. The embodiment of the present invention solves the problem that feeding efficiency decreases when microstrip line feeding is used in high-frequency applications.

A waveguide antenna apparatus includes a lower laminate layer of non-radio-frequency (RF) material and a first layer of conductive material formed on a top surface of the lower laminate layer of non-RF material. A middle layer of non-RF material formed over the first layer of conductive material, the middle layer of non-RF material comprising a waveguide cavity formed through the middle layer of non-RF material, such that air forms a propagation medium for radiation in the waveguide cavity. An upper layer of non-RF material is formed over the middle layer of non-RF material, and a second layer of conductive material is formed on a top surface of the upper layer of non-RF material, the first and second layers of conductive material and the waveguide cavity being part of a waveguide antenna.

There is provided a radar system comprising a first and a second antenna module, where each of the antenna modules comprises a first planar slotted waveguide antenna array configured for radiating electromagnetic waves, and a second planar slotted waveguide antenna array configured for receiving electromagnetic waves. The radar system further comprises a rotation system configured for supporting and rotating the first and second antenna modules around a vertical axis, with the first and second antenna modules arranged in a back-to-back position on opposite sides of a plane intersecting the vertical axis of rotation. There is also provided another radar system comprising a first radar antenna module, which radar module comprises a first planar slotted waveguide antenna array configured forradiating electromagnetic waves, and a second planar slotted waveguide antenna array configured for receiving electromagnetic waves, where each of the planar slotted waveguide antenna arrays comprisesseveral longitudinal extending waveguide columns, where the waveguide columns have a front side and a rear side with a plurality of cavity slots on the front side. The front side of the columns holding the cavity slots of the first planar antenna array are positioned in a first plane and the front side of the columns holding the cavity slots of the second planar antenna array are positioned in asecond plane parallel to the first plane, where the first and second antenna arrays may be positioned at a distance to each other in a direction to the first and second planes. The first and second parallel planes may also or alternatively be offset with a minimum perpendicular array distance to each other in a direction perpendicular to the planes.

A waveguide antenna (100) for use with a cellular-communications base station includes a pair of parallel plate waveguides (110), a vertical horn (120) coupled to said waveguide (110), a feed (130) having at least one probe (132), and a polarizer (140) for rotating the plane of polarization of a radiation beam. A wall of the waveguide (110) forms the curved backwall reflector, which may have a parabolic or semi-parabolic shape. The probe (312) is located within the parallel plate waveguides (110) and the vertical horn (120). The feed (130) may have two probes (132) and be moveably connected to the waveguides (110) for adjusting the tilt of the radiation beam.

A hollow waveguide group antenna comprises a hollow waveguide extending in a direction in space and a plurality of chambers, each of which has a sending / receiving slit and is coupled to the hollow waveguide by a coupling slit. The sending / receiving slits are distributed at a fixed distance from each other, and the distribution of the coupling slits in the direction in space at the transversal hollow waveguide is selected differently from the distribution of the sending / receiving slits such that a wave propagating at the working frequency excites the sending / receiving slits with amplitudes and phases suitable for realizing a sector direction characteristic. The fixed distance is approximately 0.5lambda0 for 90° sector direction characteristic and approximately 0.64 lambda0 for a 45° sector direction characteristic.

The invention provides a gap waveguide antenna structure and electronic equipment, and relates to the field of communication radars. The antenna structure comprises a top layer, a gap waveguide structure, a microstrip structure and a bottom layer, the top layer is parallel to the bottom layer, and a first metal layer and a second metal layer are respectively laid at two sides of a dielectric layer of the top layer. The microstrip structure is arranged in the second metal layer, and the frame of the microstrip structure is separated from the metal of the second metal layer through a gap. The above special antenna structure can reduce the transmission loss, improve the coupling capability, and effectively improve the transmission efficiency of energy or electromagnetic waves. Besides, a component or a chip and the like can be arranged on the second metal layer, so that the integration of the antenna structure is improved, and the application range of the antenna structure is expanded.

The invention relates to a waveguide antenna applied to a 4D imaging millimeter wave radar, and relates to the technical field of antennas, and the waveguide antenna applied to the 4D imaging millimeter wave radar comprises a pyramid horn antenna module and a radio frequency board module. The pyramid horn antenna module is located above the radio frequency board module, and the pyramid horn antenna module is connected with the radio frequency board module. On the basis that the pyramidal horn antenna module and the radio frequency board module are arranged in an overlapped mode, a transmitting waveguide antenna and a receiving waveguide antenna are arranged in the antenna function part in a rectangular distribution mode, and a transmitting radio frequency chip, a receiving radio frequency chip, a transmitting antenna array element and a receiving antenna array element are correspondingly arranged in the radio frequency board module. According to the waveguide antenna structure, the layout difficulty of the antenna on the PCB is reduced, the difficulty and the cost in the antenna preparation process can be reduced, and batch production is realized.

The invention discloses a millimeter-wave waveguide antenna precision diffusion welding method. A millimeter-wave waveguide antenna is made of an aluminum alloy material and comprises two parts to bewelded into a whole. The millimeter-wave waveguide antenna precision diffusion welding method comprises the steps that the surfaces of the parts are cleaned to remove an oxide film on the welding surface; the parts are assembled and placed into a vacuum furnace; and technological parameters are set, and welding machining is conducted, wherein the welding machining sequentially comprises a temperature rising stage, a temperature equalizing stage, a high-pressure stress film-breaking stage, a medium-pressure stress deformation welding stage, a low-pressure stress welding stage and a cooling stage; According to the method, different technological parameters are designed in different stages of aluminum alloy diffusion welding, coupling optimization of a diffusion welding quality result and a structural deformation result of the aluminum alloy waveguide antenna is realized, the weld strength is 75% higher than a base metal, waveguide cavity deformation does not exceed 0.05mm, and high-precision diffusion welding of the aluminum alloy waveguide antenna is realized.

The invention provides a waveguide port excitation method for electromagnetic finite element solution. A current source and a magnetic current source are applied to the waveguide port at the same time, only one direction, namely the electromagnetic wave for exciting the waveguide antenna, is generated, so that the waves in the other direction are mutually counteracted without generating the electromagnetic wave, and disturbance to a calculation area is avoided. Electromagnetic finite element solving can be carried out when the port is placed at any position of a calculation area, and limitation of the placement position is avoided. Meanwhile, the excitation problem of the waveguide port in the specified direction during finite element electromagnetic calculation is solved, and the convenience of the solving process is improved. According to the method, in a finite element solving formula, the change of an original calculation program is small, the increased calculation amount is small,and the portability is high.

The invention discloses a silicon-based TEM wave antenna array based on an MEMS technology and a manufacturing method of the antenna array, and relates to the technical field of waveguide antennas. The antenna array comprises an antenna layer, a window layer and a coupling energy layer which are arranged from top to bottom successively and connected fixedly; the antenna layer, the window layer and the coupling energy layer are prepared by silicon-based dielectric substrates; the upper surface of the antenna layer is provided with more than two rows of rectangular etching areas, the rectangular etching areas in the same row are arranged separately, and the sizes of the rectangular etching areas are the same; and the antenna layer, the window layer and the coupling energy layer are provided with metal layers in positions except the side surfaces. On the basis of penetrated etching and surface gilding technologies in the MEMS micromachining technology, a double-conductor TEM wave transmission line whose two ends are shorted is combined with a regular magnetic flow control manner are used in the three silicon-based dielectric substrates to obtain the high-gain antenna array with stable directional diagrams in the broadband.

An antenna structure having a waveguide configured to operate as at least a portion of an antenna. Also, the waveguide may be configured to operate as a first antenna, and the waveguide has a hole configured to operate as a second antenna.

The invention discloses microwave plasma diamond growth equipment. The equipment comprises a coupling cavity, an opening is formed in the top of the coupling cavity, a process gas inlet end is arranged in the coupling cavity, a base station is arranged in the coupling cavity, a substrate is placed on the base station, a microwave device is arranged above the coupling cavity, and comprises a microwave source, a waveguide, an antenna and a connecting piece with an opening in the bottom, one end of the microwave source is connected with the waveguide; a connecting piece is connected below the waveguide; one end of the antenna penetrates through the waveguide and is arranged in the connecting piece; and the opening in the top of the coupling cavity is in butt joint with the opening in the bottom of the connecting piece. Process gas is ionized through high energy generated by microwaves, and the ionized gas grows into diamond on the surface of the substrate. Based on the principle of chemical deposition, the diamond single crystal film grown by the microwave plasma diamond growth equipment is of great significance in application of the infrared diaphragm. The substrate does not need tobe heated by a hot wire, so that a pollution source is thoroughly eliminated, the energy density is improved, and the film grows better and faster.