44 results about "Compact range" patented technology

The invention provides a method for testing a phased array compact range of a high-orbit communication satellite. The method comprises the following steps: unfolding and fixing a whole satellite antenna on the ground; confirming that a test coupler is installed and a cable is connected normally; uploading software to a phased array antenna and confirming that the function is normal; setting a phased array transponder path, switching on the change-over switch, and opening the active single machine and the phased array on the path; after the phased array is preheated through telemetering, system-level testing is carried out, wherein at least one performance parameter such as noise spectrum and equivalent omnidirectional radiation power and functions such as program control pointing and beam hopping are tested; program control pointing function verification is performed according to wave beam program control preset pointing, and the DUT turntable is matched to verify the precision; hopping beam function verification jumps according to a preset time slot, and a Zero Span mode of a frequency spectrograph analyzes a time domain characteristic verification time sequence; and switching the phased array to standby after verification, shutting down after telemetering is normal, and recovering the on-satellite state. In this way, it can be ensured that the integration performance of the phased-array antenna and the transponder system meets the design requirement through quantitative analysis.

The invention relates to a double-anti-terahertz compact range assembly error compensation method, which comprises the following steps of: assembling a main support structure, and removing assembly stress through high-temperature aging; a main reflector is installed on the main supporting structure, and the main reflector is calibrated; the current position of the main reflector is calibrated to a reference mirror on the side edge of the main reflector, and a test coordinate system is established based on the reference mirror; an auxiliary reflector mounting bottom plate is mounted on the main supporting structure, an auxiliary reflector is mounted on the auxiliary reflector mounting bottom plate, and the auxiliary reflector is calibrated; calculating the offset of the final position of the feed source assembly relative to the theoretical position of the feed source assembly; and with the main reflector as a reference, the position of the feed source assembly is adjusted based on the offset by adopting a high-precision six-degree-of-freedom platform, so that the feed source assembly is located at a final position. According to the invention, the assembly and calibration difficulty of the sub-reflector is effectively reduced, and the final assembly and calibration precision of the terahertz compact range system is equivalent to the test precision of an optical test instrument, namely the highest precision can be achieved.

The utility model relates to a compact range reflector, which comprises a reflecting surface (1), a back frame (2) and a base (3), wherein the back frame (2) is used for connecting the reflecting surface (1); the base (3) is used for supporting the reflecting surface (1) and the back frame (2); the back frame (2) is fixedly supported on the base (3); a first adjusting pull rod (4) is connected between the reflecting surface (1) and the back frame (2); the reflecting surface (1) is movably supported on the base (3); along the vertical direction, a plurality of rows of first adjusting pull rods (4) are arranged between the reflecting surface (1) and the back frame (2), and a plurality of first adjusting pull rods (4) are arranged in each row; and the first adjusting pull rod (4) is a telescopic rod and is used for adjusting the orientation of the reflecting surface (1). The compact range measuring device has the characteristics of reliable structure and flexibility in use, and the measuring effect of the compact range adopting the compact range measuring device is effectively ensured.

The utility model relates to a low-scattering foam support used for supporting a test target of a compact range. The low-scattering foam support comprises a foam support, a wave absorbing plate installed at the bottom of the foam support and a posture adjusting table used for being connected with the wave absorbing plate. The foam support is a regular cylinder and comprises a truncated cone cylinder part and a cylinder part; the truncated cone column part and the cylinder part are coaxially arranged, and the truncated cone column part is arranged at the upper end of the cylinder part; the wave absorbing plate is connected to the end, away from the truncated cone column part, of the cylinder part, and the wave absorbing plate covers the end of the cylinder part. According to the utility model, electromagnetic influence on the supported measured object can be effectively avoided through the arranged foam support, and the accuracy and reliability of the measurement process can be facilitated. In addition, a wave absorbing plate can be arranged at the bottom of the foam support, so that the influence of coupling between the posture adjusting table below and the measured object on the electromagnetic measurement process can be effectively blocked.

The invention provides a method for measuring the amplitude-phase performance of a quiet zone of a compact range measurement system, and the method comprises the steps: directly employing a rotary table of the system as a scanning device for the measurement of the amplitude-phase performance of the quiet zone; the rotary table rotates to drive the measuring antenna to sample the performance of the quiet zone (namely, the amplitude value and the phase value of a received signal of the measuring antenna at each quiet zone measuring position), so that a quiet zone measuring plane (namely the rotating plane / table board of the measuring antenna) can be kept consistent (or parallel) with a working plane of a compact range measuring system; the accuracy of the amplitude-phase performance measurement of the quiet zone is ensured, and the cost of the measurement of the quiet zone is reduced.

The utility model discloses a compact range measuring system, which relates to the technical field of compact range measurement and comprises a horn antenna, a compact range reflecting panel and an environment wave-transmitting box, the horn antenna is arranged below the compact range reflecting panel and can emit electromagnetic waves, the compact range reflecting panel is arranged outside the environment wave-transmitting box, and the environment wave-transmitting box is arranged outside the compact range reflecting panel. The compact range reflection panel can reflect electromagnetic waves, the box body of the environmental wave-transparent box can allow the electromagnetic waves to pass through, the internal space of the environmental wave-transparent box can accommodate a measured target, and environmental parameters of the internal space of the environmental wave-transparent box can be adjusted; according to the utility model, compact range measurement under different environmental conditions can be realized.

The invention discloses a test error calibration method and device for the beam pointing of a VICTS antenna, and belongs to the field of satellite communication, and the method comprises the steps: installing the VICTS antenna in a compact field, and carrying out the beam pointing test; testing the beam direction of the symmetrical side of the azimuth plane of the antenna body at a certain antenna plane included angle; calculating the angle of the normal of the antenna surface deviating from the plane wave coming direction of the compact range when the compact range turntable is in the zero position; calculating the angle value of the antenna surface deviating from the vertical direction; calculating a beam azimuth angle correction value corresponding to any beam direction; and calculating a wave beam off-axis angle correction value corresponding to any wave beam direction. According to the invention, the problem that the beam pointing test is inaccurate due to the installation error when the beam pointing of the existing VICTS antenna is tested in a compact range darkroom is solved.

The invention provides a method and system for measuring the equivalent RCS of an indoor active forwarding target, and the method comprises the steps: determining the test time delay of a test transmitting pulse and a test receiving pulse according to the first time delay of the active forwarding target and the second time delay of a calibration body; determining a target pulse parameter of the active forwarding target based on the pulse parameter of the calibration body; in the test area of the compact range, the target pulse parameter and the test time delay are adopted to test the active forwarding target, and target echo power is obtained; testing the calibration body by adopting the pulse parameter and the second time delay to obtain calibration body echo power; and determining a target RCS value of the active forwarding target according to the target echo power, the calibration body echo power and the RCS value of the calibration body. According to the scheme, the equivalent RCS measurement can be carried out on the active forwarding target under the indoor condition.

The application discloses a multi-circle gradually-changing impedance edge loading tight field device, which is a novel device different from traditional sawtooth tight field and edge curl tight field. The device sprays conductive paint with gradually-changing impedance on the edge of a parabolic surface in multiple circles, and controls the impedance value of the conductive paint in the gradually-changing manner. Compared with common sawtooth edge processing and edge curl processing, the design of the multi-circle gradually-changing impedance does not need to process the edge shape into sawtooth or curve, but only needs to load impedance on the edge surface of the parabolic reflecting surface, so that the processing steps of the tight field reflecting surface are greatly simplified, the processing difficulty is reduced, and the cost is saved. The device disclosed by the application fully meets the performance indexes of the tight field, can be used as an upgrade and substitution of the existing tight field product, and is one of the development trends of future low-frequency test fields.

The utility model provides a multi-band compatible compact range antenna test system which comprises a bottom plate, a feed-in antenna is fixedly mounted on the upper surface of the bottom plate, a fixing column is arranged on the upper side of the bottom plate and located on the left side of the feed-in antenna, a reflection panel is arranged on one side of the fixing column, and a connecting mechanism is arranged between the reflection panel and the fixing column. A mounting mechanism is arranged in the connecting mechanism, an electric lifting rod is fixedly mounted at the position, located on the right side of the feed-in antenna, of the upper surface of the bottom plate, a fixing frame is fixedly mounted on the upper surface of the electric lifting rod, and a clamping mechanism is arranged in the fixing frame. Through the arrangement of the connecting mechanism, the sliding rail and the moving block, the hydraulic rod is driven to cooperate with the fixed rod to adjust the angle of the reflection panel, the moving block slides on the surface of the sliding rail, the position of the reflection panel can be adjusted, and the test requirements of a multi-band antenna can be met.