2798 results about "Ground plane" patented technology

The invention discloses a broadband high-efficiency 1bit circularly polarized reconfigurable transmission unit and an array antenna. The reconfigurable transmission unit comprises a circularly polarized wave receiving patch, an upper-layer dielectric substrate, an upper-layer metal ground plane, a middle dielectric substrate, a DC bias line, a lower-layer metal ground plane, a lower-layer dielectric substrate and a radiation patch which are sequentially arranged from top to bottom, and can directly realize two unit phases of 0 degree and 180 degrees of circularly polarized transmission waves; the equivalent rotation phase is free of dispersion; the state of each unit in the transmission array is controlled through the FPGA, + / -60-degree large-angle scanning of circular polarization transmission beams can be achieved, the beam performance is good, and high circular polarization purity is achieved. The array antenna provided by the invention has the advantages of wide axial ratio bandwidth and high aperture efficiency, and has relatively high application potential and value in scenes requiring real-time electric control circular polarization beam scanning antennas, such as application of long-distance radar detection, communication systems and the like.

The present disclosure relates to a method and an apparatus of generating a surround view monitoring (SVM) image. The method includes: obtaining installation information of an actual camera installed on a ship; setting a virtual camera to orient toward a ground plane perpendicularly within a world coordinate system; calculating a conversion relationship between the virtual camera and the actual camera, based on the installation information of the actual camera; generating the SVM image based on the calculated conversion relationship; and controlling the ship based on the generated SVM image.

A right-hand circularly-polarized patch antenna comprising a ground plane and a patch connected to each other with one or more wires for which the wire shape and location of the end points are selected such that they do not cause an antenna mismatch, and the electrical current carried in the wires produces an extra electromagnetic field subtracted from the patch field in the nadir direction.

The invention relates to the technical field of electromagnetic shielding compensation, and discloses an electromagnetic shielding compensation method and system for an FPC high-performance computing chip interface, and the method comprises the steps: carrying out the impedance signal collection of the FPC high-performance computing chip interface, obtaining a time domain signal and a second-order change rate curve, a time domain signal is acquired by applying an alternating current excitation signal between a signal layer and a grounding layer; performing feature extraction on the time domain signal and the second-order change rate curve to obtain a feature vector; inputting the feature vector into a support vector machine model to perform electromagnetic interference classification identification to obtain an electromagnetic interference mode type; performing weighted fusion analysis on the time domain signal to obtain an electromagnetic interference state parameter; according to the method, a layered compensation controller is constructed, the impedance parameters of the shielding layer are adjusted through a self-adaptive backstepping control algorithm, compensation control parameters are obtained, accurate adjustment of the impedance parameters of the shielding layer is achieved, and stability and effectiveness of electromagnetic shielding compensation are guaranteed.

The invention relates to the technical field of autonomous mobile robots, in particular to a freight robot autonomous navigation obstacle avoidance method based on multi-sensor fusion, which comprises the following steps of: identifying dynamic targets such as pedestrians and vehicles through data fusion of a depth camera and a laser radar, and predicting a future short-term movement track of the dynamic targets by utilizing a filtering algorithm; a risk corridor over time is generated, so that emergency braking or deadlock is avoided, and the operation efficiency and the traffic smoothness are greatly improved; a space-time consistency cross validation mechanism is established by utilizing the characteristics that the laser radar is insensitive to transparent objects and ultrasonic waves are sensitive to the transparent objects, so that false alarm and missing alarm are effectively eliminated, the robot can safely pass through a complex indoor environment, and the application boundary is greatly expanded; a depth camera is used for fitting a ground plane and analyzing point cloud height change in real time, so that obstacles which cannot be expressed by a two-dimensional navigation map can be identified; and an optimal track is generated by minimizing a multi-target cost function, so that the path is ensured to be safe and smooth.

An antenna unit includes a case having a base and a lid. An antenna assembly is located within the lid and is IP67 compliant, being waterproof. The antenna assembly can provide antennas located on one or more baseplates that are positioned within the top cover of the box. A baseplate can act as a heatsink, a reflector, and / or a ground plane, for the antennas while the cover is closed and in the locked position. The antennas have been designed and optimized to work on a baseplate and designed to operate with the thick plastic cover of the box. A plurality of antenna components are situated within the base separate from the antenna assembly. An optional barrier is located within the base to divide the antenna components from the lid. The antenna assembly include different types of antennas operable at least between 600 MHz to 39 GHz. The lid is separable from the base and is divided from other components to minimize interference so that all antennas may operate simultaneously while the lid is in a closed position.

The invention relates to the technical field of curtain walls, and discloses a measuring device for processing a hyperbolic aluminum plate. Comprising a detection truss body used for providing a movable supporting structure; the laser detection instrument is mounted on the detection truss body and is used for performing three-dimensional scanning on the hyperbolic aluminum plate and generating point cloud data; the reference correction instrument is used for calibrating and detecting the reference position of the truss body; the control module is used for scanning a ground plane reference corresponding to the measuring device for machining through a reference correction instrument, and obtaining an X-axis deviation value and a Y-axis deviation value of the detection truss body and the ground plane reference and a Z-axis deviation value corresponding to the detection truss body; according to the X-axis deviation value, the Y-axis deviation value and the Z-axis deviation value, a reference correction instrument is controlled to calibrate and detect the reference position of the truss body; and controlling the laser detection instrument to walk according to a preset path, executing a scanning program to generate a three-dimensional format file, and performing fitting comparison on the three-dimensional format file and a design model corresponding to the hyperbolic aluminum plate to complete three-dimensional shape detection of the hyperbolic aluminum plate.

An antenna assembly can include a base portion and a cover, the cover configured to be removably coupled to the base portion. The antenna assembly can include a modem positioned on or above the base portion, a ground plane, and a multi-band antenna.

An antenna assembly can include a cover, an internal ground plane, and a multi-band antenna. The cover can comprise one or more walls. The internal ground plane can comprise a base of the antenna assembly and can be coupled to the cover. The multi-band antenna can comprise one or more radiating elements comprising a first radiating element formed on a first PCB portion, the first radiating element comprising a first upright radiating portion and a first head radiating portion. The first radiating element can be configured to move from a first configuration prior to engagement with the cover to a second configuration when the cover is coupled to the internal ground plane. In the first configuration, the first upright radiating portion is coplanar to the first head radiating portion. In the second configuration, the first upright radiating portion is at an angle relative to the first head radiating portion.

An antenna apparatus includes a radiation shield between an antenna element and at least one radio frequency integrated circuit (RFIC) coupled to the antenna element. An antenna substrate includes a first dielectric layer having opposite first and second surfaces, and a first metallization layer attached to the second surface to form a ground plane. A base substrate includes at least one second dielectric layer having opposite third and fourth surfaces, and a second metallization layer having a first side attached to the third surface and a second side attached to the first metallization layer to form the radiation shield. The RFIC is RF coupled to the antenna element through at least one via extending through the base substrate and a coupling element within aligned openings of the first and second metallization layers.

The invention discloses a point cloud plane parameter optimization method based on IPOPT and residual combination. The method comprises the following steps: preprocessing point cloud data; obstacle target self-adaptive removal is carried out on the preprocessed point cloud data; a composite objective function is constructed, a maximum error constraint inequality is constructed, and calculation of plane parameters is realized by using an IPOPT optimization algorithm; a loss function containing a hard constraint penalty term is constructed, and it is ensured that the optimization direction conforms to the constraint through dynamic adjustment and parameter rollback; and a dual-path parameter updating strategy of a positive learning rate and a negative learning rate is adopted to generate a corresponding residual item, and ground plane parameter updating is carried out through parameter decoupling and recombination so as to realize further optimization of point cloud plane parameters. According to the method, accurate point cloud plane parameters can be better calculated, and the anti-interference capability and scene adaptability of plane parameter fitting are integrally improved.

An antenna assembly can include a case, a first ground plane, and a multi-band multi-element antenna. The case can include a body portion and a door pivotably coupled to the body portion. The first ground plane can be coupled to the body portion and can divide the case into a first internal volume and a second internal volume. The multi-band multi-element antenna can include at least one multi-band radiating element coupled to a top side of the first ground plane. The antenna assembly can include a tablet computer and / or a display screen.

An antenna assembly can include a cover, a base, an internal ground plane, a PCB, and a multi-band antenna. The base can be coupled to the cover to define an internal volume, with the internal ground plane positioned there between. The PCB can include a base PCB portion and a first PCB portion. The multi-band antenna can comprise a radiating element formed on the first PCB portion, the radiating element comprising an upright radiating portion and a head radiating portion. The radiating element can be configured to move from a first configuration prior to engagement with the cover to a second configuration when the cover is coupled to the base. In the first configuration, the upright radiating portion can be coplanar to the head radiating portion, and in the second configuration, the upright radiating portion can be at an angle relative to the head radiating portion.

A box dipole radiating element uses a compact quad arrangement of substantially coplanar radiating arms to support slant-polarized radiation, in response to differential-mode currents generated along four sides thereof and in response to common-mode currents, which may be generated in substantially the same plane as the differential-mode currents. A feed signal routing network is provided, which includes a feed signal routing substrate on portions of the radiating arms, first through fourth signal traces on a forward face of the substrate, and first through fourth ground plane segments on a rear face of the substrate. These first through fourth ground plane segments are capacitively coupled to the radiating arms. Each of the signal traces receives a corresponding feed signal, and spans a corresponding air gap between a pair of the radiating arms.

Competing tradeoffs of overall footprint, weight, and performance impact the design of antennas for many applications. However, those for compact portable devices or mobile platforms exploiting global navigation satellite systems these are further compounded by seeking good performance over a wide angular range. Accordingly, it would be beneficial to provide designers of a wide range of electrical devices and systems with compact broadband antennas which offer a low vertical profile relative to that provided by the common filar element approaches for high precision applications. Accordingly, through a combination of a dipole, a parasitic element, and additional ground elements to a convention ground plane the inventors provide broadband high performance antenna designs with low profile and low overall footprint.

A system and method for extending and holding aloft a long-wire radio antenna using an unmanned aerial vehicle (UAV), optimizing high-frequency (HF) radio communication where ground-based infrastructure is impractical. The UAV-based system pulls an antenna wire from a reel vertically and hovers in place holding the antenna at a length resonant on the transmitting frequency, enabling effective skip propagation. The system includes mechanisms for precise impedance matching and standing wave ratio (SWR) tuning through automatic adjustments of antenna length, facilitated by onboard sensors and control systems. The antenna wire is connected to a reel anchored to the ground and connected to a wire-mesh ground plane. In one embodiment, the system constantly feeds electric power to the UAV, with filters isolating RF and power currents, enabling both antenna and power transmission functions on the same wire. This system addresses the challenges of maintaining HF communication in remote or disaster-stricken regions.

Various embodiments provide an antenna assembly and associated systems, devices, and methods. The antenna assembly may include two or more antennas, including a first antenna and a second antenna, coupled to a ground plane. The antenna assembly may further include an isolation network coupled to the ground plane between the first and second antennas. The isolation network may include a conductive structure between conductive antenna portions of the first and second antennas, and an isolation circuit coupled between the conductive structure and the ground plane. The isolation circuit may include a resistor, an inductor, and / or a capacitor (e.g., coupled in parallel with one another). Other embodiments may be described and claimed.

The present invention discloses a wide microstrip antenna array based antenna system for millimeter wave applications. The microstrip antenna array based antenna system of the present invention includes plurality of patch antennas and each of the patch antennas includes a U-slot of unequal arms. This patch antenna with the U-slot acts as the array element. The array elements are placed in a linear array at a distance of λ / 2 from each other on the antenna substrate to achieve desired scan performance. The microstrip corporate feed network with T-junction power divider is used. The antenna elements are fed by electromagnetic coupling with the feed network. The antenna array with dummy elements on both sides of the linear array together with an extra ground plane is used to achieve improved array performance with high main lobe gain and reduced side lobe.

Antenna elements and electronic devices are provided, including an antenna element includes a first radiator, a second radiator, and a radiator array. The first radiator is connected to a ground plane through a grounding component, the second radiator is spaced from the ground plane and disposed opposite to the ground plane, and the second radiator and the first radiator are spaced apart. The radiator array is spaced from the first radiator and disposed opposite to the first radiator, and is located on a side that is of the first radiator and that is further from the ground plane. The radiator array includes at least two sub-radiators, and the at least two sub-radiators are spaced from each other in an extension direction of a plane on which the radiator array is located. The first radiator includes a first hollow region, and the radiator array includes a second hollow region.

An integrated circuit (IC) device includes an IC die on a substrate, and the substrate includes a group of conductive lines between a high-permittivity dielectric layer and a low-permittivity dielectric layer, with a ground plane separated from the conductive lines by either the high- or low-permittivity dielectric layer. The substrate may include other low-permittivity dielectric layers. The substrate may include other groups of conductive lines between ground planes. The high-permittivity dielectric layer may be within a low-permittivity dielectric core layer.

A heat sink component can include a body including a thermally conductive material that is electrically non-conductive, a lower conductive layer formed over a bottom surface of the body and electrically connected with the ground plane layer, and an upper conductive layer formed over a top surface of the body. The heat sink component can have a length in an X-direction that is parallel with the top surface of the body and a thickness in a direction perpendicular to the top surface. A ratio of the length to the thickness can be greater than about 7.

A structural element, such as for use in conjunction with a satellite, may include one or more thin film solar cells (108-i), which are supported on a substrate (102), and a plurality of thin film antenna elements (110-i), which are supported on a carrier layer (104). The substrate (102) functions as a ground plane for the antenna elements (110-i).

Disclosed herein are microelectronic assemblies including direct bonding, as well as related structures and techniques. For example, in some embodiments, a microelectronic assembly may include a first microelectronic component and a second microelectronic component coupled to the first microelectronic component by a direct bonding region, wherein the direct bonding region includes a first subregion and a second subregion, and the first subregion has a greater metal density than the second subregion. In some embodiments, a microelectronic assembly may include a first microelectronic component and a second microelectronic component coupled to the first microelectronic component by a direct bonding region, wherein the direct bonding region includes a first metal contact and a second metal contact, the first metal contact has a larger area than the second metal contact, and the first metal contact is electrically coupled to a power / ground plane of the first microelectronic component.

The invention discloses a compact millimeter wave dual-polarization filtering antenna and array, which comprises 11 layers of structures (a first metal layer to a sixth metal layer, three dielectric layers and two bonding layers) and three types of metalized via holes which are sequentially stacked from top to bottom, the feed through hole penetrates through the first dielectric layer to the third dielectric layer, the short-circuit through hole penetrates through the first dielectric layer to the third dielectric layer, and the shielding hole penetrates through the third dielectric layer. Wherein a cross-shaped radiation patch and a C-shaped parasitic metal strip line are arranged on the first metal layer; an annular driving patch is arranged on the second metal layer; the third metal layer is provided with a feed metal strip line and a parasitic metal strip line. The fourth metal layer is provided with a parasitic open-circuit branch. A first grounding plane is arranged on the fifth metal layer; the sixth metal layer is provided with a second grounding plane and an anti-pad. The working frequency band covers the n258 frequency band and the n257 frequency band of 5G millimeter waves, dual-polarization radiation and effective out-of-band rejection can be achieved, and meanwhile the antenna has the advantages of being compact in structure and light and handy in appearance.

Techniques for estimating a ground plane based on lidar data and / or attributes of the ground plane are discussed herein. A vehicle captures radar data, e.g., 4D radar data including height information, as it traverses an environment. The radar data can include direct returns from an object and reflected or multipath returns, e.g., that reflect off a ground surface and the object. A position of the ground plane can be estimated based at least in part on a distance between direct returns and the reflected returns. Attributes of the ground plane may be determined from differences between the direct returns and the reflected returns.

A tunable or dual-band antenna includes a ground plane, top plane, a cage structure, first and second half-loops, and a hybrid phase shifter. The cage structure is attached to the ground plane and the top plane that includes four leg structures in electrically-conductive contact with the top plane. The top plane is one of a cross-element with four equilateral elements, a cross-element with eight equilateral elements, or a disc element. The first and second half-loops are independent from each other, located diagonally to each other within the cage structure, and support transmitting and receiving an electromagnetic field orthogonal to each other. The hybrid phase shifter shifts a frequency of the first and second half-loops to 90° from each other. The ground plane has an inner ground plane with two or more capacitors embedded therein.

The invention discloses a filtering patch antenna with out-of-band high suppression and high frequency selectivity. Comprising a dielectric substrate, a radiation patch printed on the front surface of the dielectric substrate, a parasitic branch knot, an air layer, a metal ground, a feed circular hole etched in the metal ground and used for separating a feed short needle from a metal ground plane, the feed short needle inserted into the dielectric substrate, and nylon columns inserted into four corners of the dielectric substrate and the metal ground plane and used for fixing. The structure is simple and compact, the working bandwidth is widened, the out-of-band rejection capability and the frequency selectivity are remarkably enhanced, and the requirement for coexistence of multiple frequency bands is met.

The invention belongs to the field of antennas, and discloses a millimeter wave broadband circularly polarized antenna array and a manufacturing method thereof. The fourth metal layer is used for receiving and transmitting electromagnetic waves based on the sequential rotation feed network; the fourth metal layer is also used for serving as a ground plane of the grounding coplanar waveguide; the third dielectric layer is used for transmitting the received electromagnetic waves to the third metal layer; metal via holes are introduced into the third dielectric layer to realize the performance of the grounding coplanar waveguide; the third metal layer is used for coupling electromagnetic waves to the first radiation layer and the second radiation layer based on slot coupling; the third metal layer is also used for serving as a ground plane of the grounded coplanar waveguide; the first radiation layer and the second radiation layer are respectively used for directionally radiating electromagnetic waves to a free space; metal via holes are introduced into the first radiation layer and the second radiation layer, so that the performance of the magnetoelectric dipole antenna is realized; the millimeter wave antenna meets the requirement of a millimeter wave mobile communication working frequency band, and has the characteristics of large axial ratio bandwidth, easiness in processing, low loss and stable directional diagram.

Provided in the present disclosure are a patch antenna, an antenna array and a communication device. The patch antenna comprises: a feed circuit, a slotted ground plane, and a first patch layer, a second patch layer and a third patch layer, which are sequentially stacked in the direction of the slotted ground plane facing away from the feed circuit and are spaced apart from each other, wherein the feed circuit comprises two feed ports and an open-loop annular feed portion connecting the two feed ports; the slotted ground plane is located on one side of the feed circuit; the slotted ground plane is provided with a plurality of slots; the slotted ground plane is spaced apart from the feed circuit; the orthographic projections of the slots on the feed circuit at least partially overlap the open-loop annular feed portion; and the first patch layer comprises a first patch, the second patch layer comprises a second patch, and the third patch layer comprises a first annular patch. The simplification of the structure of a polarization switchable antenna, the reduction of the return loss and the increase of the signal gain and impedance bandwidth are facilitated.

A multi-band antenna includes a reflector that provides a ground plane, a first array of first radiating elements, each of the first radiating elements located on a front side of the reflector and configured to emit first electromagnetic radiation in a low frequency band, a second array of second radiating elements, each of the second radiating elements located on the front side of the reflector and configured to emit second electromagnetic radiation in a high frequency band, and an artificial magnetic conductor (AMC) plane that is located between the reflector and a radiator of the first radiating element and between the reflector and a radiator of the second radiating element. The AMC plane is configured to reflect the first electromagnetic radiation substantially in phase and to reflect the second electromagnetic radiation substantially in antiphase.