66 results about "Microwave anechoic chamber" patented technology

The invention belongs to the technical field of satellite navigation, and particularly relates to a Beidou terminal performance closed-loop test system and method, and the system comprises a multi-system GNSS navigation signal simulation source which is used for simulating a test signal and evaluating the core performance of a navigation terminal in real time; the Beidou RDSS and short message test system is used for simulating RDSS outbound signals and completing capturing, tracking, analysis and parameter measurement of RDSS inbound signals; the satellite navigation signal forwarding system is used for receiving satellite signals and completing work such as machine testing, system debugging, time service and positioning; the portable data acquisition and playback system is used for acquiring four signals, namely, a BDS signal, a GPS signal, a GLONASS signal and a Galileo signal; and the microwave anechoic chamber is used for providing a wireless shielding test environment, supporting the rotary table to spin and simulating the running state of the missile-borne receiver. According to the invention, the comprehensive testing of the basic function performance of various navigation products, such as passive positioning, active positioning, position report and short message, can be realized, and the method has a good market application prospect.

The utility model relates to a control device for a microwave anechoic chamber test system. Comprising a shielding box which is a sealed cavity provided with a cover plate, and the shielding box is provided with a power supply socket, a data socket and an optical fiber coupler; a control circuit board, an AC-DC power supply module, a data optical fiber transceiver and other modules are installed in the shielding box. A plurality of motor control units, a power supply interface and a communication interface are integrated on the control circuit board, and a first output end of the AC-DC power supply module is connected with the control board and is used for supplying power to the control board; one end of the data optical fiber transceiver is electrically connected with the optical fiber coupler, and the other end is electrically connected with the communication interface for converting the signal into an optical signal and outputting the optical signal. The control circuit board is placed in the shielding box, so that the size of the rotary table or antenna tower equipment is reduced, and the electromagnetic interference risk of a motor and a darkroom environment is reduced; the control circuit board integrates the servo motor control unit and the stepping motor control unit for modular design, serves as an independent unit of the darkroom test system, and is high in universality.

The invention provides a channel reconstruction method, device and equipment based on a multi-probe microwave anechoic chamber and a storage medium, and the method comprises the steps: building a target channel three-dimensional spherical power spectrum model based on an azimuth angle power spectrum and a pitch angle power spectrum; generating a target channel spatial correlation matrix based on the three-dimensional spherical power spectrum model and the position vector of each antenna pair; calculating a transmission matrix between the probe position and the antenna pair; determining a target probe based on the target channel spatial correlation matrix, the transmission matrix and a progressive selection algorithm; iterating the probe weight of the target probe through a preset probe weighting algorithm based on mirror image descent to obtain a target probe weight; obtaining the spatial correlation of a simulation channel based on the position of the selected probe and the obtained weight of the target probe, and completing channel reconstruction; according to the invention, the problems of low efficiency and difficulty in meeting high-precision requirements in the channel reconstruction process can be solved; and the channel reconstruction precision and efficiency are improved.

The invention relates to a multi-band phased array antenna two-dimensional beam automatic measurement system and method, and belongs to the technical field of phased array measurement. The system comprises a PC master controller, an automatic beam controller, a vector network analyzer, a switch, a servo control system, a mechanical arm, a microwave anechoic chamber feed source and a phased-array antenna to be tested, and the automatic beam controller is connected with the PC master controller, the switch, the vector network analyzer, the servo control system and the phased-array antenna to be tested. The switch is connected with a PC master controller, a vector network analyzer and a servo control system, the vector network analyzer is further connected with a phased-array antenna to be tested, the servo control system controls a mechanical arm, the mechanical arm is provided with a microwave darkroom feed source, and signals of the microwave darkroom feed source flow to the phased-array antenna to be tested. According to the invention, the whole two-dimensional phased-array antenna beam test can be realized only by completing one-cycle scanning in a set range, and the required measurement time is greatly shortened.

1. Name of the Design Product: Absorber for Dark Room (DSH-600). 2. Use of the Design Product: This design product is used for installing in an EMC dark room or a microwave anechoic chamber to absorb electromagnetic waves. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective view.

The invention relates to an electronic equipment antenna port high-power microwave coupling effect test system and method, and the system comprises a microwave anechoic chamber, a polarization characteristic test turntable, a directivity test turntable, a transmitting antenna, a power amplifier, a radio frequency signal source, a turntable controller, and a main control computer. The polarization characteristic test turntable and the directivity test turntable are arranged in the microwave darkroom, the polarization characteristic test turntable is connected with a transmitting antenna, and the directivity test turntable is used for placing electronic equipment; the power amplifier, the radio frequency signal source, the turntable controller and the main control computer are arranged outside the microwave darkroom; the power amplifier is connected with the transmitting antenna and the radio frequency signal source, and the turntable controller is connected with the polarization characteristic test turntable and the directivity test turntable; the main control computer is connected with the radio frequency signal source; and the main control computer is connected with the turntable controller.

The application relates to a navigation terminal comprehensive performance test evaluation method based on a microwave darkroom, and belongs to the technical field of satellite navigation. The application simulates the use conditions and various scenes possibly encountered by a navigation terminal in actual use for testing by constructing a navigation terminal comprehensive performance test platform based on a microwave darkroom and constructing a navigation terminal comprehensive performance test scene, and performs comprehensive performance evaluation according to positioning / short message communication information reported by the navigation terminal. The application simulates the scenes possibly encountered by the tested terminal in actual application through a comprehensive test scene formed by multiple application scenes, the test result is closer to the actual application, and the application has good actual application value.

This invention discloses a near-field scanning detection method based on active learning to obtain conducted coupling paths. The method includes: constructing a near-field scanning detection platform; placing the circuit board under test (PCB) in a microwave anechoic chamber; and using the near-field scanning detection platform directly above the PCB to perform detection; obtaining the detection results using an active learning-based near-field scanning method; and obtaining a near-field current distribution map on the PCB at continuous time intervals based on the detection results, thereby realizing the detection of conducted coupling paths. This invention utilizes active machine learning methods to achieve more efficient near-field scanning detection, concentrating scanning points in areas with strong currents and accurately reconstructing the actual current changes of the PCB using the scan results of sparse points, greatly improving detection efficiency. By using near-field scanning detection to reconstruct the current changes on the circuit board, the coupling paths of conducted interference currents on the PCB can be quickly analyzed, meeting the requirements for detecting electromagnetic interference in systems in practical engineering.

The utility model relates to a microwave anechoic chamber multi-feed-source antenna mounting device, and belongs to a multi-feed-source antenna testing device. Comprising a multi-direction adjusting support and a movable rotating structure installed on the multi-direction adjusting support, a multi-feed-source antenna installation structure is arranged on the rotating structure, and a feed source antenna is arranged in a supporting round hole. The multi-feed-source antenna mounting structure has the beneficial effects that when the multi-feed-source antenna mounting structure is used, a plurality of feed source antennas are respectively mounted in the supporting circular holes of the multi-feed-source antenna mounting structure according to actual requirements, so that the problem of low testing efficiency caused by frequent replacement of the antennas during testing in the prior art is solved; meanwhile, the problem that the antenna is prone to damage and abrasion during frequent replacement is solved, the position of the installed feed source antenna is adjusted through the multi-direction adjusting support and the movable rotating structure, the problem that errors are large due to manual adjustment is reduced, and the testing accuracy is improved.

This invention relates to an automatic two-dimensional beam measurement system and method for multi-band phased array antennas, belonging to the field of phased array measurement technology. The system includes a PC main controller, an automatic beam controller, a vector network analyzer, a switch, a servo control system, a robotic arm, a microwave anechoic chamber feed, and the phased array antenna under test. The automatic beam controller is connected to the PC main controller, the switch, the vector network analyzer, the servo control system, and the phased array antenna under test. The switch is connected to the PC main controller, the vector network analyzer, and the servo control system. The vector network analyzer is also connected to the phased array antenna under test. The servo control system controls the robotic arm, which is equipped with a microwave anechoic chamber feed. The signal from the microwave anechoic chamber feed flows to the phased array antenna under test. This invention only requires completing one full scan within a set range to test the entire two-dimensional phased array antenna beam, greatly shortening the required measurement time.

This invention discloses a method for distinguishing parallel and vertical insects based on multi-frequency differential eigenvalues. First, based on simulations and microwave anechoic chamber measurements of insect multi-frequency differential eigenvalue characteristics, the relationship between insect multi-frequency differential eigenvalues ​​and polarization patterns, as well as insect category (parallel or vertical), was discovered. Then, based on three conditions—"differential eigenvalue relationship," "polarization pattern type," and "whether the maximum RCS direction is consistent"—the insect categories at 9.5 GHz and 11.5 GHz were classified and discussed in five cases. Finally, based on the above classification and discussion results, a new method for distinguishing parallel and vertical insects is proposed.

The invention relates to a small broadband microwave anechoic chamber based on a non-uniform artificial surface, the small broadband microwave anechoic chamber comprises a 36-polygon cylindrical shell, a broadband artificial medium wave-absorbing unit and a transmitting antenna, the broadband artificial medium wave-absorbing unit is attached to the inner wall of the 36-polygon cylindrical shell, edges are uniformly arranged on the 36-polygon cylindrical shell at intervals along the perimeter direction of the outer side of the 36-polygon cylindrical shell, and the transmitting antenna is arranged on the outer side of the 36-polygon cylindrical shell. A transmitting antenna is attached between every two adjacent edges, and the transmitting antennas are microstrip patch antennas. The broadband artificial medium wave-absorbing unit can effectively absorb 8-12 GHz electromagnetic waves incident at 0-70 degrees, has the advantages of multiple angles, broadband and high absorptivity, and provides a high-quality low-reflection test environment for scenes such as antenna measurement and microwave imaging which have strict requirements on the electromagnetic environment; the device is small in size, compact in structure and easy to install and integrate, the used materials are common materials, large-scale expansion is easy, and the device has the advantages of being passive, easy to machine and low in cost.

The utility model relates to the technical field of wave-absorbing materials, and provides a high-size microwave anechoic chamber aisle wave-absorbing structure, which comprises a bottom layer, a wave-absorbing layer, a filling layer and a top layer which are sequentially arranged from bottom to top, the bottom layer is made of a polypropylene flat plate wave-absorbing material, and a plurality of grooves are formed in the bottom layer; the wave-absorbing layer is made of a polypropylene wave-absorbing material; the wave absorbing layer adopts a plurality of pyramid-shaped structures, and the bottom of each pyramid-shaped structure is inserted into the groove of the bottom layer; the filling layer is made of polypropylene split type materials, and the top layer is made of polypropylene flat plate materials. The wave-absorbing material for the aisle is a wave-absorbing material for the aisle, which has load-bearing and absorbing properties and is relatively high in size.

The utility model discloses a calibration tool for a microwave anechoic chamber test of a radio direction finder, which relates to the technical field of direction finders and comprises a fixing plate, a boss is arranged in the middle of one side of the fixing plate, a plurality of first bolt holes penetrating through the boss and the fixing plate are arranged on the boss, and the first bolt holes are used for connecting the tool and a bottom plate of a mechanical arm. The boss is provided with a plurality of first hollow areas for wiring, the other side of the fixing plate is provided with a plurality of second bolt holes, and the second bolt holes are used for connecting a tool and a radio direction finder. When the microwave darkroom test of the radio direction finder is carried out, the calibration tool and the bottom plate of the mechanical arm are firstly fixed through the first bolt hole to complete the calibration adjustment of the calibration tool, and then the radio direction finder is fixed on the calibration tool through the second bolt hole. The radio direction finder does not need secondary calibration, and at the same time, the boss is also provided with a plurality of first hollow areas, which is convenient for wiring.

The present invention discloses an insect orientation estimation method based on polarization phase characteristics. First, based on the insect PSM measured in a microwave anechoic chamber, the polarization phase characteristics of insects are studied, and the corresponding relationship between insect orientation and polarization phase is found, that is, the maximum value of polarization phase always appears when the polarization direction is perpendicular to the insect body axis, while the minimum value of polarization phase always appears when the polarization direction is parallel to the insect body axis, and this holds for all sized insects. Then, based on the newly discovered polarization phase characteristics, a new insect orientation estimation method is proposed. The insect orientation estimated by this method theoretically has no 90° error and has higher estimation accuracy under low signal-to-noise ratio. The present invention provides an effective means for measuring insect orientation, helps to improve the observation ability of insect radars, and promotes the research on insect migration behavior.

This invention relates to a miniature dual-frequency microwave anechoic chamber based on spatially distributed ultrathin absorbing materials. It includes a rigid cylindrical shell mounted on a support. An ultrathin dual-frequency electromagnetic wave absorbing unit and a transmitting antenna are attached to the inner wall of the rigid cylindrical shell. The ultrathin dual-frequency electromagnetic wave absorbing unit and the transmitting antenna are integrally formed, and the transmitting antenna is a microstrip patch antenna. This invention, through research on spatially distributed ultrathin electromagnetic wave absorbing materials, realizes a wavelength-scale miniature dual-frequency microwave anechoic chamber. The shape and size of the microwave anechoic chamber can be customized according to actual application requirements, and it is expected to be widely used in antenna measurement, microwave imaging, and other fields. This invention features low cost, simple construction, and portability.

The present application relates to a kind of electromagnetic propagation characteristics characterization and reconstruction method of heterostructure, belong to wireless communication technical field.The method adopts the thought of single layer to multiple layers, first study single layer material propagation characteristics, clear single layer material reflection and transmission ability, in combination with measured inversion material electromagnetic parameter;Then, using single layer material electromagnetic parameter, reconstruct heterostructure model by full-wave simulation, simultaneously construct multiple layer iterative propagation model based on Fresnel theory;Finally, the simulation value of reconstructed structure model propagation characteristics, the theoretical value of multiple layer iterative model and the microwave anechoic chamber measured value are compared, verify the accuracy and effectiveness of structure model and propagation model.The present application can be extended to characterize the electromagnetic propagation characteristics of various flat plate-shaped heterostructure complex structures in full-band range, and lay a theoretical foundation for structure material classification, target perception and environment twin.

The invention relates to the technical field of communication testing, in particular to a microwave anechoic chamber testing system which comprises a detection box, a wave absorbing material and a testing antenna, the top end of the detection box is provided with a top cover in an up-down adjustable mode through a linear driving piece, a supporting partition plate is horizontally arranged in the detection box, and the testing antenna is installed in the middle of the top end of the supporting partition plate. A plurality of placing seats for placing test terminals are arranged at the top end of the supporting partition plate, the distances between the placing seats and the test antenna are equal, a plurality of movable plates in one-to-one correspondence with the placing seats are movably arranged at the bottom end of the supporting partition plate, a driving seat is arranged under the test antenna, and the driving seat is fixedly connected with the top cover through a plurality of connecting rods; the driving seat is connected with each movable plate through a driving structure and is used for synchronously pushing the plurality of movable plates to move towards one side close to or away from the test antenna, a plurality of test terminals can be tested at the same time, a worker can quickly take and place the test terminals, and the test efficiency is improved.

The present application relates to hoisting equipment technical field, specifically to a kind of wave-absorbing material hoisting system based on microwave darkroom, including hoisting drive mechanism, bottom support and the wave-absorbing wedge of being set in the top of bottom support, further including self-connection and separation mechanism, it is set on hoisting drive mechanism and bottom support, for hoisting drive mechanism and bottom support are automatically connected or separated;The self-connection and separation mechanism includes embracing component, it is set on bottom support;One-way plug-in component, it is set on hoisting drive mechanism, can reciprocate in and out along the inside of embracing component.The height position of one-way plug-in component is controlled by hoisting drive mechanism, when one-way plug-in component is inserted into embracing component and is in connecting position, the automatic connection of hoisting drive mechanism and bottom support can be realized, when one-way plug-in component is in separation position, can top pressure separation component drive embracing component to expand outward, the automatic separation of hoisting drive mechanism is realized.

The utility model discloses a microwave anechoic chamber target body gas heating test device and test method. The device comprises a target body, a wave-transparent furnace, a workbench, a rotating mechanism, a lifting mechanism, a control unit, an air heater, a fan, a hot air pipeline and a cooling water tank. The wave-transparent furnace comprises a furnace body, a furnace cover, a gasket, a guide plate I, a guide plate II, a target body bracket and a temperature sensor; the rotating mechanism comprises a motor, a toothed chuck and a motor cover; the furnace body and the furnace cover are limited through a groove but not fixedly connected, and are lubricated and sealed by high-temperature-resistant grease; the motor drives the toothed chuck to rotate so as to drive the furnace cover to rotate synchronously. According to the heating test device and method, hot gas is adopted for heating, programmed heating of the target body can be maintained in the whole microwave test process, the heating device is far away from the furnace body, a heat source does not interfere the test process, it is guaranteed that a target body rotating system does not affect the measurement precision through the wave-transparent furnace and the polyurethane wave-absorbing screen, and the measurement accuracy is improved. And the measurement result is reliable.

The invention relates to a microwave anechoic chamber and an aircraft navigation communication terminal anti-interference test system. A cylindrical bottom with the same diameter is arranged at the bottom of a hemispherical top of the microwave anechoic chamber; a discrete satellite signal simulation transmitting antenna is arranged at the center of the inner top wall of the hemispherical top; the transmitting ends of the plurality of interference signal transmitting antennas all point to the sphere center of the hemispherical top; the multiple sliding rails are distributed in a circular array mode with the center axis of the cylindrical bottom as the circle center. Each sliding rail comprises a vertical part, and the top of each vertical part is connected with a semicircular part making contact with the inner wall of the corresponding hemispherical top. The circle center of the semicircular part is concentric with the sphere center of the hemispherical top; the interference signal transmitting antenna moves on the sliding rail through the moving assembly to change the pitch angle, so that interference parameters such as the interference direction, the number and the motion trail can be controlled, the incoming direction of interference in the whole airspace can be covered, the condition of continuous motion of a target receiver relative to the incoming direction of interference can be accurately simulated, and the accuracy of interference is improved. And the anti-interference test requirement of a high-dynamic Beidou navigation communication terminal product can be met.

The utility model discloses an aisle wave-absorbing plate for a microwave anechoic chamber. The aisle wave-absorbing plate comprises a wave-absorbing plate main body, the auxiliary connecting assembly comprises a fixing rod, an inserting rod, a mounting rod, a fixing block and a connecting frame; the fixing rods are embedded in the two sides of one end of the wave-absorbing plate body, the inserting rods are fixed to the outer side ends of the fixing rods, the mounting rods are embedded in the two sides of the other end of the wave-absorbing plate body, the fixing blocks are fixed to the two sides of the edge of one side of the top end of the wave-absorbing plate body, and the connecting frames are fixed to the two sides of the edge of the other side of the top end of the wave-absorbing plate body. According to the utility model, through the arrangement of the auxiliary connecting assembly, when the wave-absorbing plate main body is in butt joint through the conductive adhesive, the inserting rod is inserted into the mounting rod, and the wave-absorbing plate main body drives the connecting frame to move synchronously, so that the connecting frame is clamped with the fixing block, and the mounted wave-absorbing plate main body is further connected and limited through the inserting rod, the mounting rod, the fixing block and the connecting frame; the wave-absorbing plate main body is prevented from being separated from a designated position after long-term use of glue, and the wave-absorbing plate is prevented from being lost.

The utility model discloses a microwave anechoic chamber measurement supporting rotary table with a shockproof structure, which comprises a rotary table and a bottom ring which are arranged in a microwave anechoic chamber, the bottom ring is fixed on the ground of the microwave anechoic chamber through bolts, a plurality of supporting columns are arranged on one end face of the rotary table facing the bottom ring, and universal wheels are arranged at the other ends of the supporting columns. The universal wheels are sleeved with supporting cylinders, a plurality of channels allowing the universal wheels and the supporting cylinders to pass through are formed in the outer circle of the bottom ring, a top ring is installed on the end face, facing the bottom ring, of the rotary table, and the top ring is sleeved with a connecting ring. The device is simple in structure, the connecting ring can rotate downwards and is in threaded connection with the bottom ring, the extrusion part can push the supporting barrel to descend along with descending of the connecting ring until the supporting barrel abuts against the ground, the necking end of the supporting barrel abuts against the top face of a support on the universal wheel, and therefore the supporting barrel is pressed on the ground, and the supporting barrel is not prone to falling. And the rotary table can be axially positioned through the bottom ring, the connecting ring and the top ring, so that the test stability is ensured.

The utility model relates to a wave-absorbing door curtain installed in a millimeter wave radar anechoic chamber, which comprises a wallboard structure, a wave-absorbing sponge layer and wave-absorbing pyramids, the end face of the wallboard structure is provided with the wave-absorbing sponge layer, the wave-absorbing sponge layer is uniformly provided with a plurality of wave-absorbing pyramids, and the wave-absorbing pyramids are arranged in the wallboard structure. A penetrating hole penetrating through the wave-absorbing sponge layer and the wallboard structure is formed in the middle of the wave-absorbing sponge layer and the wallboard structure, a butt joint base is arranged on the upper side of the wallboard structure, the butt joint base is in butt joint with the upper end of the wallboard structure, and two sliding supporting feet are symmetrically arranged at the two ends of the upper side of the butt joint base; two longitudinally-arranged sliding rail structures are arranged on the upper side of the wallboard structure side by side, and the sliding supporting feet are installed in the sliding rail structures in a one-to-one sliding mode. The device has the characteristics of stable operation, improved measurement precision, simplified operation difficulty, saved operation time and the like.

This invention discloses a method for detecting the phase center of a Beidou navigation antenna and communication antenna feed, belonging to the field of satellite navigation and communication technology. Specifically, it includes the following steps: S1, connecting the transmitting antenna, transmitting turntable, vector network analyzer, computer, printer, antenna turntable, and antenna under test in a microwave anechoic chamber; S2, adjusting the antenna under test and the transmitting antenna using a laser beam to ensure consistent measurement standards. The microwave anechoic chamber is covered on all six sides with shielding and absorbing materials, effectively isolating external electromagnetic interference and creating a reflection-free, low-interference testing environment. This avoids distortion of phase measurement data due to external electromagnetic signal coupling, ensuring that the test results accurately reflect the antenna's inherent characteristics. Strict limits are imposed on parameters such as the quiet zone size, humidity, temperature, and atmospheric pressure of the microwave anechoic chamber to reduce the impact of slowly changing environmental factors such as temperature and humidity on the antenna's electrical performance, ensuring consistent testing conditions.

The invention discloses a hybrid wave absorber for antenna testing in a miniaturized microwave anechoic chamber and a design method thereof, the hybrid wave absorber comprises a conical wave absorber and a frequency selection surface, the conical wave absorber is a periodic array structure composed of conical wave absorber units, the frequency selection surface is a periodic array structure composed of frequency selection surface units, and the frequency selection surface is a periodic array structure composed of frequency selection surface units. The conical wave absorbing body units are in one-to-one correspondence with the frequency selection surface units; the frequency selection surface unit comprises a dielectric substrate, an air layer and a metal bottom plate which are arranged in sequence, and one surface of the dielectric substrate is printed with a centrosymmetric pattern with the center of the dielectric substrate as the symmetric center. Compared with a traditional wave-absorbing body, the mixed wave-absorbing body designed by the invention can realize the same or even better wave-absorbing performance only by using half of the thickness of the traditional wave-absorbing body. The wave-absorbing material has the advantages of smaller thickness, wider wave-absorbing frequency band and better wave-absorbing performance, and can be applied to a miniaturized microwave anechoic chamber.

The embodiment of the invention provides an anechoic chamber testing system based on a phased array radar antenna, and relates to the field of phased array radar antenna testing, and the system comprises a receiving and sending large box product end, a receiving and sending large box beacon end, a change-over switch box, a beacon horn antenna, and a phased array radar antenna. The receiving and transmitting large box product end is connected with a receiving interface and a transmitting interface of the phased array radar antenna. The receiving and sending large box beacon end is connected with the beacon horn antenna, and the beacon horn antenna is aligned with the phased array radar antenna; a receiving channel and a transmitting channel are arranged in the change-over switch box, and the change-over switch box is connected with the receiving and transmitting large box product end and the receiving and transmitting large box beacon end and used for switching the signal direction from the phased array radar antenna to the beacon horn. Compared with an existing test system, the test system has the advantages that the accuracy of test data is improved, the test preparation time and accessory preparation cost are reduced, and the test efficiency is improved.

1. Name of the design product: Absorber for anechoic chamber (DSH-1250). 2. Use of the design product: This design product is used for installing in an EMC anechoic chamber or a microwave anechoic chamber to absorb electromagnetic waves. 3. Design key points of the design product: Lies in the shape. 4. Picture or photograph that best shows the design key points: Perspective view. 5. The rear view is the same as the front view, so the rear view is omitted; the right view is the same as the left view, so the right view is omitted.

The utility model belongs to the technical field of anechoic chambers, and particularly discloses an anechoic chamber with an adjustable assembled shielding case, which comprises a frame and two groups of sliding chutes, the top end, the bottom end, the front end and the rear end of the frame are respectively provided with two groups of sliding chutes, and a shielding plate II is fixedly inserted into the left side between the sliding chutes; a first shielding plate is assembled and fixed to the right side of the second shielding plate, and inserting grooves are formed in the right side of the second shielding plate and the right side of the first shielding plate respectively. According to the microwave anechoic chamber capable of adjusting and assembling the shielding shell, two groups of sliding grooves are formed in the top end, the bottom end, the front end and the rear end of the frame respectively, four groups of second shielding plates are inserted into the upper, lower, front and rear surfaces of the frame along the sliding grooves from the right side, then inserting grooves and inserting rods at all positions are aligned, and the other first shielding plates are installed on the right sides of the second shielding plates; the wallboard on the right side is closed, the positioning rod is inserted into the transverse groove, and the bolt is rotated to be embedded between the screw hole and the hole for reinforcement, so that the problem of inconvenience in disassembly and assembly is solved.

The invention discloses a phased-array antenna beam forming test method in a darkroom-free environment, and relates to the technical field of satellite communication terminal complete machine testing, comprising the steps of initializing test system configuration, setting test parameters, initializing an antenna state, establishing a test environment, and connecting a test antenna with a channel simulator; cross coupling of non-corresponding channels is isolated and reduced through an algorithm, a signal transmission link between a test antenna and a tested antenna is established through a wireless channel by adopting a virtual wire connection mode, non-contact test is realized, beam forming test is performed, a mobile station moves to a preset test area, impedance of the test antenna is adjusted by adopting an electronic tuning mode, and the antenna is tested. The beam former realizes independent control of an uplink and a downlink, analyzes a test result and generates a report, does not need to depend on fixed test facilities such as a microwave anechoic chamber and a calibration tower, can directly test in an actual working scene, and is particularly suitable for field test of mobile equipment such as a large vehicle-mounted phased array system.