Complete machine antenna testing device with high efficiency and high precision

Abstract

The utility model discloses a complete machine antenna testing device with high efficiency and high precision, which comprises a case, a shielding test box body, a drawer type bearing platform, an industrial personal computer, a comprehensive tester, a test antenna and a radio frequency control switch, the test antennas are arranged on the left side wall, the right side wall, the rear end wall and the inner top wall of the shielding test chamber respectively, the test antennas are used for testing the radio frequency performance of a to-be-tested product, the radio frequency control switch is arranged on the outer side wall of the shielding test chamber, and the radio frequency control switch is electrically connected with the test antennas respectively. The radio frequency control switch is used for controlling the test antenna to send and receive radio frequency signals. The utility model also discloses a complete machine antenna test method. According to the technical scheme of the utility model, the coupling test precision can be improved without increasing the test time, and the test efficiency is effectively ensured while the test precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of production line OTA testing, and in particular to a whole-machine antenna testing device with high efficiency and high precision. Background Art

[0002] CTIA has developed standards for OTA testing. OTA testing focuses on the radiation performance of the entire device and has gradually become a test item that mobile phone manufacturers value and recognize. Currently, only mobile phone models that have passed FTA (Full Type Approval) certification testing can be marketed. In FTA testing, RF performance testing primarily tests the phone's RF performance in cable mode. As for the phone's overall radiation transmission and reception performance, FTA testing does not clearly define this. OTA testing addresses this deficiency. Furthermore, terminal manufacturers must have a clear understanding of the radiation performance of their mobile phones and implement various measures to improve both transmission and reception. Poor radiation performance can lead to issues such as poor signal quality, poor voice call quality, and frequent dropped calls, which are common customer complaints.

[0003] The production line whole machine coupling test shielding box is a device used to test the antenna performance of communication products, including transmission performance and receiving performance.

[0004] However, the current traditional production line machine coupling test device has the following defects:

[0005] 1. Poor test accuracy: Because production line testing needs to ensure efficiency, there are often only a few test antennas (usually less than 15) inside the shielding box. Due to the small number of test antennas, the data measured by the test antennas differs significantly from the data obtained in the OTA laboratory.

[0006] 2. Low test efficiency: Although increasing the number of test antennas can improve test accuracy, as the number of test antennas continues to increase, each test antenna needs to be measured once, which causes the test time cost to increase exponentially. While the test accuracy is improved, the test efficiency is reduced. It is impossible to improve test accuracy while ensuring test efficiency.

[0007] 3. High debugging costs: Different testing solutions are required for each product and project, which consumes a lot of manpower and time. In addition, it is difficult to adjust the antenna positions of all machines to the same level, resulting in poor consistency across the entire line. This can easily lead to mismeasurements and misjudgments, inaccurate power or undetected antenna defects, and defective devices being shipped, leading to quality complaints from customers.

[0008] 4. High maintenance cost: more maintenance technicians are required. Utility Model Content

[0009] The main purpose of the present invention is to provide a whole-machine antenna testing device with high efficiency and high precision, aiming to solve the technical problem mentioned in the background technology that the traditional production line whole-machine coupling testing device cannot improve the testing accuracy and efficiency at the same time.

[0010] To achieve the above-mentioned purpose, the utility model proposes a high-efficiency and high-precision whole-machine antenna testing device, which includes a chassis, a shielded test box, a drawer-type supporting platform, an industrial computer, a comprehensive tester, a test antenna and a radio frequency control switch. The shielded test box is arranged at the upper end of the chassis, and a shielded test chamber is arranged inside the shielded test box, and the shielded test chamber is used to isolate external signal interference. The front end of the shielded test box is provided with an opening, and the drawer-type supporting platform can be slid back and forth along the opening. The drawer-type supporting platform is used to place the product to be tested, and the drawer-type supporting platform can place four products to be tested at the same time. The front end of the drawer-type supporting platform is provided with a shielding door, and the shielding door can close the opening. The industrial computer and the comprehensive tester are arranged in the chassis. The tester is used to communicate data with the product to be tested. There are multiple test antennas and RF control switches. The test antennas are arranged in a matrix on the left and right side walls, the rear end wall and the inner top wall of the shielded test chamber, and the test antennas adjacent to each other are set with orthogonal polarizations. The test antenna is used to test the RF performance of the product to be tested. The RF control switch is set on the outer wall of the shielded test chamber, and the RF control switch is electrically connected to the test antenna and the comprehensive tester respectively. The industrial computer is respectively connected to the RF control switch, the comprehensive tester and the product to be tested. The product to be tested is respectively connected to the industrial computer. The RF control switch is used to control the sending and receiving of RF signals by the test antenna. The comprehensive tester is connected to the product to be tested.

[0011] Optionally, the number of the test antennas is set to 30, the test antenna matrices located on the left and right inner walls of the shielded test chamber are both 3 rows × 2 columns, and the test antenna matrices located on the rear end wall and inner top wall of the shielded test chamber are both 3 rows × 3 columns.

[0012] Optionally, the row spacing of the test antenna matrix located on the left and right inner walls of the shielding test chamber is 175 mm, and the column spacing is 150 mm. The row spacing of the test antenna matrix located on the rear end wall of the shielding test chamber is 175 mm, and the column spacing is 200 mm. The row spacing and column spacing of the test antenna matrix located on the inner top wall of the shielding test chamber are both 200 mm.

[0013] Optionally, the inner wall of the shielding test chamber has a width of 800 mm, a height of 700 mm, and a depth of 800 mm.

[0014] Optionally, the test antenna includes an insulating acrylic base, a disc antenna and an antenna interface, the insulating acrylic base is respectively arranged on the left and right inner walls, the rear end wall and the inner top wall of the shielding test chamber, the disc antenna is respectively arranged at the upper end of the insulating acrylic base, the antenna interface is respectively arranged at the lower end of the insulating acrylic base, the antenna interface is respectively electrically connected to the disc antenna, and the disc antenna is used to receive and transmit signals.

[0015] Optionally, it also includes fastening screws, and the insulating acrylic base is arranged in a U-shaped structure, and a limiting groove is respectively recessed on both sides of the upper end wall of the insulating acrylic base, and an L-shaped limiting step is respectively provided on both sides of the lower end of the circular antenna, and the upper ends of the L-shaped limiting steps are respectively embedded in the limiting grooves, and the outer side walls of the lower end of the L-shaped limiting steps are respectively abutted against the inner side walls of the upper end of the insulating acrylic base, and the lower end of the insulating acrylic base is recessed with a square through hole, and the upper end of the antenna interface is protruded with a square plug-in portion, and the square plug-in portion is embedded in the square through hole, and the side wall of the lower end of the insulating acrylic base is recessed with a screw hole connected to the square through hole, and the side wall of the square plug-in portion is recessed with a threaded hole, and the fastening screws are respectively transmitted to the screw holes and screwed into the threaded holes.

[0016] Optionally, it also includes a cylinder, a sliding rod and a sliding sleeve, the cylinders are respectively arranged on the two outer walls of the shielding test box, and the front end of the cylinder rod of the cylinder is fixedly connected to the two sides of the shielding door, the cylinder is used to drive the drawer-type load-bearing platform to automatically slide back and forth along the opening, the sliding sleeves are respectively embedded on both sides of the front end of the shielding test box, the sliding rods can be slid back and forth through the sliding sleeves, and the front end of the sliding rods are respectively fixedly connected to the two sides of the shielding door.

[0017] Optionally, it also includes a camera and a protective cover, which are respectively arranged at the upper end of the front end wall of the shielding test box, the camera is vertically arranged above the drawer-type supporting platform, and the camera is located in the protective cover, and the camera is electrically connected to the industrial control computer.

[0018] The utility model proposes a high-efficiency and high-precision whole-device antenna testing device, and the specific testing process includes the following steps:

[0019] Step 1: Install and secure the carrier board on the drawer-type carrier platform. Place the product to be tested in the corresponding slot on the carrier board and secure it with the fixture on the corresponding slot on the carrier board. Connect the industrial computer to the four products to be tested via a data cable or WiFi. Use the data cable to read the COM port number or the camera to identify the IP address of the product to be tested. Then, bind it one-to-one with the slot on the carrier board, so that the slot on the carrier board corresponds to the product to be tested.

[0020] Step 2: RF line loss calibration and sampling test antenna selection. Place the gold machine on the fixture corresponding to a slot on the carrier board and fix it. Assign the initial line loss value to the integrated test instrument and start the test. Use the RF control switch to switch 30 test antennas to the integrated test instrument for measurement. Sort the measured values of the 30 test antennas from large to small. According to the number of test antennas required, select the sample test antennas from the 30 test antennas in descending order according to the measured values. The number of selected sample test antennas is between 6 and 24. The measured value is calculated by the reverberation chamber algorithm built into the industrial computer. The line loss compensation value is obtained by comparing the measured value with the standard value. The line loss compensation value is added to the initial line loss value to obtain the line loss calibration value of a slot. Place the gold machine in other slots and calibrate the RF line loss of each slot in turn. Perform RF line loss calibration for each test item in turn.

[0021] Step 3: Uplink test: The industrial computer sends a command to the product under test, which then sends a standard uplink signal with a fixed frequency band level. The signal is then sent to the RF control switch by the industrial computer, switching the sampling test antenna selected in step 2 to the integrated tester. The sampling test antenna receives the test signal sent by the product under test and samples it. The value is uploaded to the industrial computer through the integrated tester, and the uplink power test result is calculated using the reverberation chamber algorithm built into the industrial computer and displayed on the screen.

[0022] Step 4: Downlink test: The industrial computer sends a command to the integrated tester, which sends a standard downlink signal with a fixed frequency level. The signal is then sent to the RF control switch by the industrial computer, switching the sampling test antenna selected in step 2 to conduct with the integrated tester. The sampling test antenna sends a standard downlink signal with a fixed frequency level. The downlink received signal strength and receiving sensitivity of the product under test are sampled and uploaded to the industrial computer. The downlink power of the product under test is calculated using the reverberation chamber algorithm built into the industrial computer and displayed on the display.

[0023] Step 5: Screening for unqualified products. The uplink power test results and downlink power test results measured by the industrial computer are compared with the preset measurement thresholds to select unqualified products. The slots corresponding to unqualified products are displayed in red on the display screen, and the slots corresponding to qualified products are displayed in green.

[0024] Optionally, the number of the sample test antennas selected in step 2 is 15.

[0025] The technical solution of the present invention has the following beneficial effects:

[0026] 1. The technical solution of the utility model combines the characteristics of the traditional production line coupling test shielding box and the laboratory microwave reverberation chamber. By increasing the number of test antennas and increasing the size of the shielded test chamber, the test accuracy is effectively improved. By arranging multiple test antennas and RF control switches in the shielded test box, the two adjacent test antennas on the same surface are orthogonally polarized to each other. Through the built-in algorithm, the measurement values of the 30 test antennas are sorted from large to small, and the test antennas selected from the sorting in descending order according to the required number are used as sampling test antennas. The number of sampling test antennas is between 12 and 18. Then, the RF control switch is used to switch the values of each test antenna to sample, thereby achieving an effect similar to that of a traditional laboratory microwave reverberation chamber. While improving the test accuracy, it will not increase the test time, thereby effectively improving the test efficiency while improving the test accuracy.

[0027] 2. The technical solution of this utility model does not require changes to the entire device (including the test antenna) for different communication electronic products to be tested and different frequency bands to be tested. When changing models, there is no need to adjust any antenna-related mechanisms, making production conversion very convenient and fast;

[0028] 3. The technical solution of this utility model has higher test accuracy and repeatability, with a test resolution of up to 1dB. The test results are highly linearly positively correlated with the OTA darkroom test data, and the test results are closer to the darkroom results of the OTA standard R&D laboratory. It can more accurately judge defective products, thereby effectively improving the test accuracy of the production line's complete machine coupling test shielding box;

[0029] 4. The technical solution of this utility model has higher test efficiency. By optimizing the sampling algorithm, the test data of all test antennas can be obtained very quickly, ensuring test efficiency. It is not limited by the number of antennas of the tested product, that is, no sub-station testing is required. It also supports simultaneous testing of up to 4 DUTs, doubling the efficiency, thereby effectively improving the test efficiency of the coupled test shielding box of the entire production line.

[0030] 5. The technical solution of this utility model adopts a pneumatic drawer-type entry and exit method, supports automated manipulator pick-up and placement, and realizes the control connection of the tested parts through barcode scanning, which is simple to operate;

[0031] 6. Low maintenance cost, reducing maintenance technicians;

[0032] 7. Multiple test frequency bands: can support all communication modes below 8GHz;

[0033] 8. Intelligent test algorithm: The balance between accuracy and algorithm makes the test data more accurate and the test time faster;

[0034] 9. Applicable test products are diversified: support mobile phones, tablets, routers, car T-box, game controllers, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0036] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency and high-precision whole-device antenna testing device according to an embodiment of the present invention;

[0037] Figure 2 This is a partial structural diagram of a high-efficiency and high-precision whole-device antenna testing device according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of another part of the structure of a whole-device antenna testing device with high efficiency and high precision according to an embodiment of the present utility model;

[0039] Figure 4 This is a schematic diagram of a partially exploded structure of a whole-device antenna testing device with high efficiency and high precision according to an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of a test antenna matrix located on the rear end wall and inner top wall of a shielded test chamber of a device for testing antennas with high efficiency and high precision according to one embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of a test antenna matrix located on the left and right side walls of a shielded test chamber of a device for testing antennas with high efficiency and high precision according to an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the exploded structure of a test antenna of a whole-device antenna test device with high efficiency and high precision according to one embodiment of the present invention;

[0043] Figure 8 This is a schematic structural diagram of a carrier board and a fixture of a whole-device antenna testing device with high efficiency and high precision according to one embodiment of the present invention;

[0044] Figure 9 This is a flowchart of a testing process for a whole-device antenna testing device with high efficiency and high precision according to an embodiment of the present invention.

[0045] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0049] The utility model provides a whole-machine antenna testing device with high efficiency and high precision.

[0050] like Figures 1 to 8As shown, in one embodiment of the present invention, the whole-machine antenna testing device with high efficiency and high precision includes a chassis 101, a shielded test box 102, a drawer-type carrier 103, an industrial computer (not shown), a comprehensive tester (not shown), a test antenna 104 and a radio frequency control switch 200. The shielded test box 102 is arranged at the upper end of the chassis 101, and a shielded test chamber is arranged inside the shielded test box 102. The shielded test chamber is used to isolate external signal interference. The front end of the shielded test box 102 is provided with an opening 1021, and the drawer-type carrier 103 can be slid forward and backward along the opening. The drawer-type carrier 103 is used to place the product to be tested, and the drawer-type carrier 103 can place four products to be tested at the same time. The front end of the drawer-type carrier 103 is provided with a shielding door 107, which can close the opening 1021. The industrial computer and the comprehensive tester are provided with a shielding door 107. The combined tester is arranged in the chassis 101, and the comprehensive tester is used to communicate data with the product to be tested. There are multiple test antennas 104 and RF control switches 200. The test antennas 104 are arranged in a matrix on the left and right side walls, the rear end wall and the inner top wall of the shielded test chamber, and the test antennas 104 adjacent to each other are set with orthogonal polarizations. The test antennas 104 are used to test the RF performance of the product to be tested. The RF control switch 200 is set on the outer wall of the shielded test chamber, and the RF control switch 200 is electrically connected to the test antenna 104 and the comprehensive tester respectively. The industrial computer is respectively connected to the RF control switch 200, the comprehensive tester and the product to be tested for data. The product to be tested is respectively connected to the industrial computer for data. The RF control switch 200 is used to control the sending and receiving of RF signals by the test antenna, and the comprehensive tester is data connected to the product to be tested.

[0051] Specifically, if Figure 5 and Figure 6 As shown, the number of test antennas 104 is set to 30, the test antenna matrices located on the left and right inner walls of the shielded test chamber are both 3 rows × 2 columns, and the test antenna matrices located on the rear end wall and inner top wall of the shielded test chamber are both 3 rows × 3 columns.

[0052] Optionally, the row spacing of the test antenna matrix located on the left and right inner walls of the shielded test chamber is 175 mm, and the column spacing is 150 mm. The row spacing of the test antenna matrix located on the rear end wall of the shielded test chamber is 175 mm, and the column spacing is 200 mm. The row spacing and column spacing of the test antenna matrix located on the inner top wall of the shielded test chamber are both 200 mm.

[0053] Optionally, the inner wall of the shielding test chamber has a width of 800 mm, a height of 700 mm, and a depth of 800 mm.

[0054] Specifically, in this embodiment, the test antenna 104 includes an insulating acrylic base 1041, a disc antenna 1042 and an antenna interface 1043. The disc antenna 1042 is arranged in a disc-shaped structure. The insulating acrylic base 1041 is respectively arranged on the left and right inner walls, the rear end wall and the inner top wall of the shielded test chamber. The disc antenna 1042 is respectively arranged at the upper end of the insulating acrylic base 1041. The antenna interface 1043 is respectively arranged at the lower end of the insulating acrylic base 1041. The antenna interface 1043 is electrically connected to the disc antenna 1042. The disc antenna 1042 is used to receive and transmit signals, and two adjacent disc antennas 1042 located on the same surface are arranged with orthogonal polarizations to each other.

[0055] Specifically, in this embodiment, the insulating acrylic base 1041 is arranged in a U-shaped structure, and a limiting groove 1044 is respectively provided on both sides of the upper end wall of the insulating acrylic base 1041, and an L-shaped limiting step 1045 is respectively provided on both sides of the lower end of the circular antenna 1042. The upper ends of the L-shaped limiting steps 1045 are respectively embedded in the limiting grooves 1044, and the outer side walls of the lower ends of the L-shaped limiting steps 1045 are respectively abutted against the inner side walls of the upper end of the insulating acrylic base 1041.

[0056] Specifically, in this embodiment, a fastening screw (not shown) is further included. A square through hole 1046 is recessed in the lower end of the insulating acrylic base 1041, and a square plug-in portion 1047 is protruded from the upper end of the antenna interface 1043. The square plug-in portion 1047 is embedded in the square through hole 1046. A screw hole 1048 connected to the square through hole 1046 is recessed in the side wall of the lower end of the insulating acrylic base 1041, and the side wall of the square plug-in portion 1047 is recessed in the threaded hole 1049. The fastening screws are respectively inserted into the screw holes 1048 and screwed into the threaded holes 1049.

[0057] Specifically, in this embodiment, a cylinder 108 is also included. The cylinder 108 is respectively arranged on the two outer walls of the shielding test box 102, and the front end of the cylinder rod of the cylinder 108 is respectively fixedly connected to the two sides of the shielding door 107. The cylinder 108 is used to drive the drawer-type carrier 103 to automatically slide back and forth along the opening 1021.

[0058] Specifically, in this embodiment, it also includes a sliding rod 109 and a sliding sleeve 110. The sliding sleeves 110 are respectively embedded in both sides of the front end of the shielding test box 102. The sliding rod 109 can be slid forward and backward through the sliding sleeves 110, and the front end of the sliding rod 109 is fixedly connected to both sides of the shielding door 107.

[0059] Specifically, in this embodiment, it also includes a camera 111 and a protective cover 112. The camera 111 and the protective cover 112 are respectively arranged at the upper end of the front end wall of the shielding test box 102. The camera 111 is vertically arranged above the drawer-type supporting platform 103, and the camera 111 is located in the protective cover 112. The camera 111 is electrically connected to the industrial control machine.

[0060] Specifically, in this embodiment, universal casters 113 and liftable foot cups 114 are further included. The universal casters 113 and liftable foot cups 114 are respectively arranged at the four bottom corners of the lower end wall of the chassis 101.

[0061] Specifically, in this embodiment, an entry and exit control button 115 is further included. The entry and exit control buttons 115 are respectively arranged on both sides of the front end wall of the shielding door 107, and the entry and exit control buttons 115 are respectively electrically connected to the industrial control machine.

[0062] Specifically, in this embodiment, a liquid crystal screen 105 and an alarm light 106 are further included. The liquid crystal screen 105 and the alarm light 106 are respectively arranged on the upper end wall of the shielding test box 102. The liquid crystal screen 105 and the alarm light 106 are respectively used to display test parameters and equipment status.

[0063] like Figure 9 As shown, the utility model proposes a high-efficiency and high-precision whole-device antenna testing device, and the specific testing process includes the following steps:

[0064] Step 1: Install and secure the carrier board on the drawer-type carrier platform. Place the product to be tested in the corresponding slot on the carrier board and secure it with the fixture on the corresponding slot on the carrier board. Connect the industrial computer to the four products to be tested via a data cable or WiFi. Use the data cable to read the COM port number or the camera to identify the IP address of the product to be tested. Then, bind it one-to-one with the slot on the carrier board, so that the slot on the carrier board corresponds to the product to be tested.

[0065] Step 2: RF line loss calibration and sampling test antenna selection. Place the gold machine on the fixture corresponding to a slot on the carrier board and fix it. Assign the initial line loss value to the integrated test instrument and start the test. Use the RF control switch to switch 30 test antennas to the integrated test instrument for measurement. Sort the measured values of the 30 test antennas from large to small. According to the number of test antennas required, select the sample test antennas from the 30 test antennas in descending order according to the measured values. The number of selected sample test antennas is between 6 and 24. The measured value is calculated by the reverberation chamber algorithm built into the industrial computer. The line loss compensation value is obtained by comparing the measured value with the standard value. The line loss compensation value is added to the initial line loss value to obtain the line loss calibration value of a slot. Place the gold machine in other slots and calibrate the RF line loss of each slot in turn. Perform RF line loss calibration for each test item in turn.

[0066] Step 3: Uplink test: The industrial computer sends a command to the product under test, which then sends a standard uplink signal with a fixed frequency band level. The signal is then sent to the RF control switch by the industrial computer, switching the sampling test antenna selected in step 2 to the integrated tester. The sampling test antenna receives the test signal sent by the product under test and samples it. The value is uploaded to the industrial computer through the integrated tester, and the uplink power test result is calculated using the reverberation chamber algorithm built into the industrial computer and displayed on the screen.

[0067] Step 4: Downlink test: The industrial computer sends a command to the integrated tester, which sends a standard downlink signal with a fixed frequency level. The signal is then sent to the RF control switch by the industrial computer, switching the sampling test antenna selected in step 2 to conduct with the integrated tester. The sampling test antenna sends a standard downlink signal with a fixed frequency level. The downlink received signal strength and receiving sensitivity of the product under test are sampled and uploaded to the industrial computer. The downlink power of the product under test is calculated using the reverberation chamber algorithm built into the industrial computer and displayed on the display.

[0068] Step 5: Screening for unqualified products. The uplink power test results and downlink power test results measured by the industrial computer are compared with the preset measurement thresholds to select unqualified products. The slots corresponding to unqualified products are displayed in red on the display screen, and the slots corresponding to qualified products are displayed in green.

[0069] Specifically, the number of the sample test antennas selected in step 2 is 15.

[0070] Verification example: The x-axis of all linear graphs represents the data of the darkroom (laboratory), and the y-axis represents the data tested on our device. The degree of overlap is the linear value.

[0071] 10 mobile phones were placed in a standard darkroom laboratory for testing to obtain standard test data for each slot, and the mobile phones were respectively placed in the high-efficiency and high-precision whole-machine antenna test device of the present invention, and then the 10 mobile phones were tested using the test method of the present invention to obtain test data for each slot of the present invention. A line graph was then drawn based on the standard test data and the test data of the present invention to obtain a linear correlation graph for each slot of the 10 mobile phones. It can be seen that the test results obtained by using the high-efficiency and high-precision whole-machine antenna test device and test method of the present invention are highly linearly positively correlated with the standard darkroom laboratory test data, and the test results are closer to the darkroom results of the OTA standard R&D laboratory. The use of the present invention can achieve accurate measurement, and the test data is also true and reliable, and defective products can be more accurately judged, thereby effectively improving the test accuracy of the whole-machine coupling test shielding box of the production line.

[0072] Specifically, the advantages of the present invention are:

[0073] 1. Combining the features of traditional production line coupling test shielding boxes and laboratory microwave reverberation chambers, the system effectively improves test accuracy by increasing the number of test antennas and increasing the size of the shielded test chamber. By setting multiple test antennas and RF control switches in the shielded test chamber, two adjacent test antennas on the same surface are orthogonally polarized to each other. Through a built-in algorithm, the measured values of the 30 test antennas are sorted from large to small. The test antennas selected from the sorted values in descending order according to the required number are used as sampling test antennas. The number of sampling test antennas ranges from 12 to 18. The RF control switch is then used to switch the sampling of each test antenna, thus achieving an effect similar to that of a traditional laboratory microwave reverberation chamber. While improving test accuracy, it does not increase test time, thereby effectively improving test efficiency while improving test accuracy.

[0074] 2. The technical solution of this utility model does not require changes to the entire device (including the test antenna) for different communication electronic products to be tested and different frequency bands to be tested. When changing models, there is no need to adjust any antenna-related mechanisms, making production conversion very convenient and fast;

[0075] 3. The technical solution of this utility model has higher test accuracy and repeatability, with a test resolution of up to 1dB. The test results are highly linearly positively correlated with the OTA darkroom test data, and the test results are closer to the darkroom results of the OTA standard R&D laboratory. It can more accurately judge defective products, thereby effectively improving the test accuracy of the production line's complete machine coupling test shielding box;

[0076] 4. The technical solution of this utility model has higher test efficiency. By optimizing the sampling algorithm, the test data of all test antennas can be obtained very quickly, ensuring test efficiency. It is not limited by the number of antennas of the tested product, that is, no sub-station testing is required. It also supports simultaneous testing of up to 4 DUTs, doubling the efficiency, thereby effectively improving the test efficiency of the coupled test shielding box of the entire production line.

[0077] 5. The technical solution of this utility model adopts a pneumatic drawer-type entry and exit method, supports automated manipulator pick-up and placement, and realizes the control connection of the tested parts through barcode scanning, which is simple to operate;

[0078] 6. Low maintenance cost, reducing maintenance technicians;

[0079] 7. Multiple test frequency bands: can support all communication modes below 8GHz;

[0080] 8. Intelligent test algorithm: The balance between accuracy and algorithm makes the test data more accurate and the test time faster;

[0081] 9. Applicable test products are diversified: support mobile phones, tablets, routers, car T-box, game controllers, etc.

[0082] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high-efficiency and high-precision whole-device antenna testing device, characterized in that: It includes a chassis, a shielded test box, a drawer-type carrier, an industrial computer, a comprehensive tester, a test antenna and a radio frequency control switch. The shielded test box is arranged at the upper end of the chassis, and a shielded test chamber is arranged inside the shielded test box. The shielded test chamber is used to isolate external signal interference. The front end of the shielded test box is provided with an opening. The drawer-type carrier can be slid back and forth along the opening. The drawer-type carrier is used to place the product to be tested, and the drawer-type carrier can place four products to be tested at the same time. The front end of the drawer-type carrier is provided with a shielding door, and the shielding door can close the opening. The industrial computer and the comprehensive tester are arranged in the chassis. The comprehensive tester is used to communicate data with the product to be tested. There are multiple test antennas and RF control switches. The test antennas are arranged in a matrix on the left and right side walls, the rear end wall and the inner top wall of the shielded test chamber, and the test antennas adjacent to each other are arranged with orthogonal polarizations. The test antenna is used to test the RF performance of the product to be tested. The RF control switch is set on the outer wall of the shielded test chamber, and the RF control switch is electrically connected to the test antenna and the comprehensive tester respectively. The industrial computer is respectively connected to the RF control switch, the comprehensive tester and the product to be tested for data. The product to be tested is respectively connected to the industrial computer for data. The RF control switch is used to control the sending and receiving of RF signals by the test antenna, and the comprehensive tester is connected to the product to be tested for data.

2. The high-efficiency and high-precision whole-device antenna testing device according to claim 1, characterized in that: The number of the test antennas is set to 30. The test antenna matrices located on the left and right inner walls of the shielded test chamber are both 3 rows × 2 columns, and the test antenna matrices located on the rear end wall and inner top wall of the shielded test chamber are both 3 rows × 3 columns.

3. The high-efficiency and high-precision whole-device antenna testing device according to claim 2, characterized in that: The row spacing of the test antenna matrix located on the left and right inner walls of the shielded test chamber is 175mm, and the column spacing is 150mm. The row spacing of the test antenna matrix located on the rear end wall of the shielded test chamber is 175mm, and the column spacing is 200mm. The row spacing and column spacing of the test antenna matrix located on the inner top wall of the shielded test chamber are both 200mm.

4. The high-efficiency and high-precision whole-device antenna testing device according to claim 1, characterized in that: The inner wall of the shielding test chamber has a width of 800 mm, a height of 700 mm, and a depth of 800 mm.

5. The high-efficiency and high-precision whole-device antenna testing device according to claim 1, characterized in that: The test antenna includes an insulating acrylic base, a disc antenna and an antenna interface. The insulating acrylic base is respectively arranged on the left and right inner walls, the rear end wall and the inner top wall of the shielding test chamber. The disc antenna is respectively arranged at the upper end of the insulating acrylic base. The antenna interface is respectively arranged at the lower end of the insulating acrylic base. The antenna interface is respectively electrically connected to the disc antenna. The disc antenna is used to receive and transmit signals.

6. The high-efficiency and high-precision whole-device antenna testing device according to claim 5, characterized in that: It also includes fastening screws. The insulating acrylic base is arranged in a U-shaped structure. A limiting groove is respectively provided on both sides of the upper end wall of the insulating acrylic base. An L-shaped limiting step is respectively provided on both sides of the lower end of the circular antenna. The upper ends of the L-shaped limiting steps are respectively embedded in the limiting grooves. The outer side walls of the lower end of the L-shaped limiting steps are respectively abutted against the inner side walls of the upper end of the insulating acrylic base. The lower end of the insulating acrylic base is recessed with a square through hole. The upper end of the antenna interface is convexly provided with a square plug-in portion, and the square plug-in portion is embedded in the square through hole. The side wall of the lower end of the insulating acrylic base is recessed with a screw hole connected to the square through hole. The side wall of the square plug-in portion is recessed with a threaded hole. The fastening screws are respectively transmitted to the screw holes and screwed into the threaded holes.

7. The high-efficiency and high-precision whole-device antenna testing device according to claim 1, characterized in that: It also includes a cylinder, a sliding rod and a sliding sleeve. The cylinders are respectively arranged on the two outer side walls of the shielding test box, and the front end portions of the cylinder rods of the cylinders are respectively fixedly connected to the two sides of the shielding door. The cylinders are used to drive the drawer-type carrier platform to automatically slide back and forth along the opening. The sliding sleeves are respectively embedded on both sides of the front end of the shielding test box. The sliding rods can be slid back and forth through the sliding sleeves, and the front end portions of the sliding rods are respectively fixedly connected to the two sides of the shielding door.

8. The high-efficiency and high-precision whole-device antenna testing device according to claim 1, characterized in that: It also includes a camera and a protective cover, which are respectively arranged at the upper end of the front end wall of the shielding test box. The camera is vertically arranged above the drawer-type supporting platform, and the camera is located in the protective cover. The camera is electrically connected to the industrial control computer.

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