306 results about "Antenna surface" patented technology

A small and light automotive radar having a high detection performance by preventing the road clutter and its in-vehicle positioning is optional is provided. The automotive radar comprises an antenna 1, 2a, 2b equipped with at least one radiating element which radiates linear polarized radio waves; a slit plate 7 which is a metal plate in which a plurality of slits are defined, placed in front of the surface of the antenna; radio wave absorbers 5 provided between the antenna and the slit plate; and a transceiver device which supplies transmit signals to the antenna to radiate radio waves and, from signals acquired by receiving reflection waves which are returned waves of the radio waves reflected by an obstruction, detects a direction in which the obstruction exists.

An antenna device has a divider producing first and second signals, and amplifiers amplifying the signals at a changeable amplitude ratio of the first signal to the second signal. A Rotman lens gives first phase differences to first high frequency waves, produced from the first amplified signal at an input port and transmitted to output ports, and gives second phase differences to second high frequency waves produced from the second amplified signal at another input port and transmitted to the output ports. An antenna forms a beam composed of electromagnetic waves, having the first phase differences and electric power corresponding to the first amplified signal on an antenna surface, and electromagnetic waves, having the second phase differences and electric power corresponding to the second amplified signal on the antenna surface, and radiates the beam in a particular direction corresponding to the phase differences and the amplitude ratio.

An antenna deformation measuring method comprises firstly adhering circular mark points and circular ring mark points which are transversely and longitudinally arranged in equidistance on the surface of an antenna as measuring mark points, respectively taking images of the surface of the antenna which is adhered with the mark points before and after the antenna deforms, realizing the homonymy point matching through the arrangement relationship of the circular mark points and the circular ring mark points, recurring the three-dimensional coordinates of the mark points on the antenna before and after deforming according to the principles of photography measurement, finally putting the three-dimensional coordinates before and after the antenna deforms in the same coordinate system by using coding mark points on a staff gauge as a fixed reference point for the coordinate conversion, thereby calculating the antenna deformation. The measuring method has the characteristics of reliability, flexibility and high precision, can be used for the deformation measurement of the antenna under complicated conditions such as high-low temperature and the like, also can be used for the appearance measurement of the antenna, and has measurement precision superior to 13 mu m.

The invention relates to a cable net reflecting surface antenna surface accuracy and tension state simultaneous design method which is characterized by at least including the steps of firstly, determining an initial balance reference configuration, namely the configuration when k=0, marking the corresponding node position as X<(0)>, and marking a cable section lofting length as L0<(0)>; secondly, determining the node displacement Us<(k)> required by the cable net during the kth iteration; thirdly, on the basis of the kth balance, determining the sensitivity matrix T/L0 of the cable section tension to the cable length and the sensitivity matrix X/ L0 of the node position to the cable length during the kth iteration; fourthly, using a optimization model to solve the kth cable length correction amount; fifthly, correcting the cable section lofting length to be L0<(k+1)>=L0<(0)>+delta L0<(k)> after the kth iteration; sixthly repeating the process until the given convergence condition is satisfied. By the method, cable net tension is allowed to be even while the antenna surface accuracy is guaranteed.

A wireless communication device includes: a high frequency circuit for generating a high frequency signal, the high frequency circuit being provided on a high-frequency-circuit surface of an integrated antenna module substrate mounted on a mounting substrate; a patch antenna for irradiating radio waves indicative of the generated high frequency signal, the patch antenna being provided on an antenna surface of the integrated antenna module substrate; and a ring-shaped grounding surface provided on the antenna surface of the integrated antenna module substrate so as to surround the patch antenna. This allows reducing surface waves irradiated from the end of the integrated antenna module substrate and improving antenna characteristics.

The invention provides a method for making a main part of antenna for radio frequency identification (RFID) of a tag, aiming to make an aluminum etched antenna which is good in electrical property, low in pollution and price, large in productivity and thin in thickness. The method for making the aluminum etched antenna comprises the following steps of: combining aluminum foil with polyster PET plastic film; 2. treating the surface of the combined composite aluminum foil with a washing solution; 3. printing with printing ink; 4. performing chemical etching on the combined composite aluminum foil; 5. removing the printing ink on the surface of the aluminum antenna after etching. The method for making a RFID etched aluminum antenna of the invention adopts the printing ink with special components, which almost prevents the environment pollution during the etching process, thereby the printing ink on the surface of the antenna after etching is easy to remove, various difficult factors in the production are overcome. The invention contributes greatly to the popularization and application of the RFID technology.

The invention relates to a portable carbon fiber double reverse satellite communication antenna which comprises a back frame. One end of a feed source support is in folded connection with the lower portion of the back frame, and the feed source support is connected with a feed system. The portable carbon fiber double reverse satellite communication antenna is characterized by further comprising an orientation fine adjustment mechanism and a pitch adjustment mechanism. The back frame is connected with the pitch adjustment mechanism, and the pitch adjustment mechanism is installed on the orientation fine adjustment mechanism. An auxiliary reflecting surface and the feed system are installed on a connecting pipe, the connecting pipe is fixedly connected with the other end of the feed source support, and an antenna pedestal is movably connected with the orientation fine adjustment mechanism. The antenna surface is of a split structure, and the portable carbon fiber double reverse satellite communication antenna is convenient to dismantle and install, small in size, light in weight and convenient to collect; due to the fact that a double reverse structure is adopted, signals are excellent; and the antenna is convenient to adjust, performs search rapidly, has accuracy in location and is high in precision, attractive in appearance, rapid to install, simple to operate and convenient to carry.

An anti-metal ultra-high frequency electronic tag composed of a multi-layer antenna, including a substrate, an antenna receiving/transmitting surface, a ground plane, an ultra-high frequency electronic chip placed on the antenna receiving/transmitting surface, an auxiliary substrate, and an auxiliary receiving/transmitting surface launch surface. The positive and negative poles of the UHF electronic chip are connected to the receiving/transmitting surface of the antenna through the feeder; the receiving/transmitting surface is connected to the ground part isolated by the substrate through one or a row of feeding holes; the auxiliary receiving and transmitting surface is isolated through the auxiliary substrate . When the antenna ground plane is in use, it is directly connected to the metal surface, and the metal surface becomes the antenna ground plane in actual use to achieve the purpose of anti-metal; the role of the auxiliary receiving/transmitting surface is to increase the surface area of ​​the antenna to enhance the electromagnetic wave The effect of energy reception/emission. Such a three-dimensional design can reduce the size of the antenna while increasing the area of ​​the antenna.

The invention discloses a temperature control method of a wave-absorbing external heat flow simulation system for a large-scale spacecraft microwave antenna vacuum thermal test, surface temperature of a wedge inside a wave-absorbing box is used as a controlled object, and a thin film heater on the outer surface of the wave-absorbing box serves as a heater, thereby realizing temperature control of an antenna arranged inside the wave-absorbing box. According to the method, on the basis of a multistage PID algorithm, a stable-state and dynamic model of wave-absorbing material surface temperature-antenna surface arrived heat flow is established to set ratio parameters, integral parameters and differential parameters at different temperatures; algorithm target curves are given in a segmented manner; a fuzzy control algorithm is adopted to improve the balancing speed of the controlled object; and a neural network model is introduced to predict the test piece surface temperature. The temperature control method of the wave-absorbing external heat flow simulation system for the large-scale spacecraft microwave antenna vacuum thermal test realizes uniformity and high-efficiency and high-precision control of antenna temperature in a large-scale spacecraft microwave antenna thermal test, is suitable for a large-scale microwave antenna vacuum thermal test, improves test effectiveness and coverage of the test, and is also suitable for a vacuum thermal test of a spacecraft equipped with a large-scale microwave antenna.

An image forming apparatus includes a communication portion arranged inside a cover covering an image forming portion in the main body of the apparatus and including an antenna surface for use in establishing near field communication. The cover includes a stacking portion in its upper section. The stacking portion is configured to receive a recording medium with an image thereon, the recording medium being discharged outside the main body of the apparatus. The antenna surface faces a region of the upper section of the cover downstream in a direction of discharging the recording medium. The antenna surface at least partially faces a region of the upper section of the cover outside the stacking portion in a direction perpendicular to the direction of discharging the recording medium. The communication portion is capable of communicating with another communication portion using near field communication.

The invention relates to an absolute calibration device and method for a radio telescope antenna surface type. The absolute calibration device for the radio telescope antenna surface type is composed of a PSD position sensor array, a supporting shaft, annular laser devices and a control circuit. The PSD position sensor array is composed of multiple coaxial PSD position sensor coils, each PSD position sensor coil is composed of multiple PSD position sensor units with multiple position points on a central axis as circle centers, and the photosensitive surfaces are dead against the central axis and are in parallel with the central axis. The supporting shaft is arranged on the central axis and provided with the annular laser devices, and the emitting surfaces of the annular laser devices are perpendicular to the central axis. The device is simple in structure, low in cost and easy to manufacture and assemble. The active reflecting surfaces of the radio telescope are convenient to upgrade, performance of the radio telescope is guaranteed in real time, and the implementation technology is simple.

The invention discloses a holographic modulation based artificial tensor impedance surfaced antenna and an implementation method thereof. The artificial tensor impedance surfaced antenna systematically comprises an artificial tensor impendance surface composed of multiple unit lattices equal in size; each unit lattice sequentially comprises a metal floor, a dielectric substrate and a metal paster from top to bottom; surface impedance corresponding to the unit lattices of the artificial tensor impedance surface is controlled through geometric parameters of the metal paster, so that the surface impedance on the surface of the antenna is distributed according to holographic interference pattern rules of a source field and a target field. The implementation method includes the steps of S1, scalar impedance extraction and simulation; 2), matching of equivalent scalar surface impedance curves; S3, holographic modulation of the sensor surface impedance; S4, antenna modeling and simulation. The target radiation field of a specific planning mode is obtained by the aid of the holographic tensor surface impedance principle, an equivalent scalar surface impedance matching criterion is put forward, and data volume needed in modulation of the tensor surface impedance is effectively reduced.

The invention discloses an automatic compensation method based on an angular speed meter of a mobile satellite antenna. The automatic compensation method comprises the steps of: establishing an error angle-signal intensity mathematic model according to a practical measurement result by a way that the angular speed meter and an antenna surface are synchronously fixed and utilizing the phenomenon that the signal intensity of an antenna is distributed unevenly; in combination with cone scanning and formula replacement, deducing a relation of the error angle and direct-current component and alternating-current component of the antenna signal intensity; and performing zero-point constant-value drifting calculation of the angular speed meter by using a method of judging historical data; finally finishing omnibearing compensation of the zero-point drifting of the angular speed meter. According to the automatic compensation method, a process of dynamically identifying the zero point of the angular speed meter under current environment temperature by change of the antenna signal intensity is realized and proved by a test, and the compensation process is accurate, reliable and effective, so that the automatic compensation method is in particular suitable for use in an occasion where the zero point of the angular speed meter cannot be calibrated.

The invention discloses a manual operation antenna pedestal system. The manual operation antenna pedestal system comprises a base, a direction adjusting mechanism for adjusting an azimuth angle of an antenna surface through flexible transmission, and a pitching angle adjusting mechanism for adjusting pitching angles of the antenna surface through flexible transmission. The bottom end of the direction adjusting mechanism is fixedly connected with the top end of the base, the bottom end of the pitching angle adjusting mechanism is fixedly connected with the top end of the direction adjusting mechanism, and one side end of the pitching angle adjusting mechanism is fixedly connected with the bottom end of the antenna surface. The manual operation antenna pedestal system is applicable to manual direction pitching type antennas which can be used for tracking a communication satellite, can achieve the light weight and miniaturization of antennas, reduces return differences of transmission chains of the antennas, and greatly improves transmission accuracy of the antennas.

The radar apparatus includes an antenna device including a transmitting antenna and a receiving antenna, a main body which generates a radar wave, transmits the radar wave from the transmitting antenna, and receives the radar wave reflected from an obstacle to be detected by the receiving antenna, and a cover member covering the main body and the antenna device on a side of a transmission direction of the radar wave and located out of contact with the main body and the antenna device. The cover member has a transmission portion allowing the radar wave to pass therethrough, a surface of the transmission portion facing the antenna device being inclined by an angle greater than 3 degrees with respect to an antenna surface of the receiving antenna.

A small, light and low-cost on-vehicle radar which reduces noise caused by a road surface, own car and radar itself, prevents road clutter and improves detection performance is provided. The on-vehicle radar includes an antenna having one or a plurality of radiation elements which radiate linearly polarized waves, a slit plate provided with a plurality of slits on a metal plate disposed in front of this antenna surface and a foamed material provided between the antenna and slit plate. Side lobes whose principal component is a cross polarized wave from a feeder line of the antenna can be reduced and road clutter can be prevented. Resonance of slits whose characteristic frequency becomes equal to or smaller than the frequency of vehicle can be reduced and noise can be suppressed. Therefore, it is possible to obtain excellent detection performance as the radar apparatus.

The invention discloses a method for manufacturing a large-caliber high-precision antenna surface made of composite materials, and relates to an antenna reflection surface manufacturing technology in fields like satellite communications, wireless measurement and control, deep-space exploration and large-size radio telescopes. A main reflection surface is of a large-caliber paraboloid structure and is integrally formed on a mold according to a composite material vacuum filling technology. A back frame is of a composite material foam sandwich structure and is a supporting body provided with a space lattice structure and formed by cross ribs and longitudinal ribs in a longitudinal and cross orthogonal mode. Through the method, the large-caliber high-precision antenna reflection surface can be successfully manufactured and has the advantages of being light in weight, large in rigidity, good in vibration resisting performance and high in production efficiency, wherein the caliber phi of the antenna reflection surface is larger than 10m, and the precision delta of the antenna reflection surface is 0.3mmRMS.

The invention discloses a gain-oriented large-scale deformed parabolic antenna panel precision adjusting method. The method comprises the following steps: confirming the structure scheme of a parabolic antenna and the initial position of an actuator, building a finite element model of the antenna structure and actuator supporting panel nodes; confirming the deformation error upper bound of the paraboloid; calculating the self-weight deformation of the antenna structure and extracting the node information of the deformed paraboloid; calculating the root-mean-square error of an optimally-matched paraboloid and the deformed paraboloid of the antenna; confirming corresponding nodes of the deformed paraboloid and the optimally-matched paraboloid; calculating the adjustment amount of the actuator; adjusting the panel position and updating the finite element model of the antenna structure; and confirming the deformation error upper bound of the paraboloid according to the antenna gain requirement, judging whether the error is in an allowable range or not and obtaining the adjustment amount with optimal precision. By means of the method disclosed by the invention, the gain-oriented adjustment amount of the actuator can be directly calculated; the actuator total travel is shortest and the real-time performance is good; both the antenna surface precision and the aperture efficiency are highest; and therefore, the electrical property deterioration problem caused by the self-weight deformation of the antenna is solved.

The invention provides a distributed high-precision laser online measurement system. A main/backup laser device acts as an emitting light source. Emitting laser is divided into multipath emitting light beams through an optical beam combiner, an optical circulator and an optical beam splitter. The number of split light paths of the emitting light beams is further increased by an optical switch array, and the optical switches can perform time sequence switching on emergent light paths through the control of the system. Each path of emergent laser is corresponding to one optical transmit-receive antenna so as to be corresponding to one cooperative target body. Laser returned by the cooperative target returns to the optical circulator through the light paths and enters a photoelectric detector. Echo phase calculation is performed by a signal processing system after photoelectric conversion of the photoelectric detector so that accurate distance information of a target dot matrix can be obtained. In-orbit real-time deformation measurement is performed on satellite antennas and other large deployable mechanisms, and imaging resolution of the large antennas and the calculated image quality can be enhanced by measurement of the antenna surface.

The invention relates to a coupled feeding horizontal omni-directional annular radio frequency identification (RFID) label antenna. Existing RFID antennas are mostly in a dipole structure, the directional graph is perpendicular to the surface of the antenna and commonly applied to a vertical surface of an object, and when the vertical surface of a target object is not enough to provide an available area for an RFID label, the structure is not applicable any more. The coupled feeding horizontal omni-directional annular RFID label antenna comprises a substrate, a radiation outer ring antenna and a coupled feeding inner ring structure, wherein the radiation outer ring antenna and the coupled feeding inner ring structure are arranged on the substrate, and the two rings are in a concentric structure. The coupled feeding horizontal omni-directional annular RFID label antenna is small in structure, capable of working below the federal communications commission (FCC) frequency range (902-928 MHz), and capable of being attached to the upper surface and the lower surface of the target object, the radiation directional graph is omni-directional on a horizontal plane, and the reading distance can reach 9.5 m as far as possible.

In order to improve a cable, comprising an inner cable body, in which at least one conductor strand of an optical and/or electrical conductor runs in the longitudinal direction of the cable, an outer cable sheath, enclosing the inner cable body and lying between an outer sheath surface of the cable and the inner cable body, and at least one information carrier unit, disposed within the outer sheath surface of the cable such that the cable also comprises a shielding, the invention proposes that the information carrier unit having an antenna unit lying in an antenna surface running approximately parallel to the longitudinal direction of the cable, by the antenna surface running at a distance from an electrical shielding of the cable and by providing, between the antenna surface and the shielding, a spacing layer, in which the electromagnetic field that couples to the antenna unit and passes through the antenna surface can extend between the antenna unit and the shielding.