Test device and test method

Abstract

A test device (200) and a test method. The test device (200) comprises a test cavity body (10), a radio frequency module (20), an antenna (30), and a processing assembly (40); a test cavity (102) is provided in the test cavity body (10), the test cavity (102) being used for accommodating a member under test; the radio frequency module (20) comprises a transmitter (202), a receiver (204), a first coupler (206), a second coupler (208) and a switching member (210), the transmitter (202) being used for outputting a radio frequency signal, and the first coupler (206) being used for collecting the radio frequency signal output by the transmitter (202); the antenna (30) is used for feeding the radio frequency signal into the test cavity (102), and is used for receiving electromagnetic waves radiated by the member under test; the second coupler (208) is used for collecting the electromagnetic waves radiated by the member under test and received by the antenna (30); the processing assembly (40) is connected to the transmitter (202), the receiver (204) and the switching member (210), the processing assembly (40) being used for controlling the switching member (210) to connect the receiver (204) to the first coupler (206) or to connect the receiver (204) to the second coupler (208).

Description

Test equipment and test methods

[0001] Priority information

[0002] This application claims priority and benefits of patent application No. 202310802304.9 filed with the State Intellectual Property Office of China on June 30, 2023, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of electronic equipment testing, and in particular to a testing device and a testing method. Background Art

[0004] Currently, electronic equipment must meet certain electromagnetic compatibility (EMC) requirements to ensure proper operation in an electromagnetic interference environment without causing unacceptable electromagnetic interference to other devices. Electromagnetic compatibility testing includes radiated immunity (EMS) and radiated interference (EMI) testing. EMS testing requires high precision in the output RF signal parameters. Therefore, achieving closed-loop control of the generated RF signal to achieve the desired parameters during testing remains a challenging technical challenge.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a testing device and a testing method to solve at least one of the above-mentioned technical problems.

[0007] A test device according to an embodiment of the present application includes a test cavity, a radio frequency module, an antenna, and a processing component;

[0008] A test cavity is provided in the test cavity, and the test cavity is used to accommodate the tested object;

[0009] The radio frequency module includes a transmitter, a receiver, a first coupler, a second coupler and a switch, the transmitter is used to output a radio frequency signal, and the first coupler is used to collect the radio frequency signal output by the transmitter;

[0010] The antenna is used to feed the radio frequency signal into the test cavity and to receive the electromagnetic waves radiated by the device under test;

[0011] The second coupler is used to collect electromagnetic waves radiated by the device under test and received by the antenna;

[0012] The processing component is connected to the transmitter, the receiver and the switch, and is used to control the switch to connect the receiver to the first coupler or to connect the receiver to the second coupler.

[0013] In the above-mentioned test equipment, the processing component can control the switching component to connect the receiver to the first coupler, or to connect the receiver to the second coupler. When the receiver is connected to the first coupler, the test equipment can use the receiver to detect the RF signal output by the transmitter during the EMS test, thereby realizing the use of the receiver to detect the RF signal and perform closed-loop control of the RF signal. When the receiver is connected to the second coupler, the test equipment can perform EMI testing.

[0014] In some embodiments, the first coupler is used to collect the radio frequency signal output by the transmitter and form a first output signal;

[0015] The second coupler is used to collect the electromagnetic waves radiated by the device under test and received by the antenna and form a second output signal;

[0016] When the receiver is connected to the first coupler, the receiver is configured to receive and process the first output signal to form a third output signal, and the processing component is configured to adjust parameters of the radio frequency signal according to the third output signal, and control the transmitter to output the radio frequency signal according to the adjusted parameters of the radio frequency signal;

[0017] When the receiver is connected to the second coupler, the receiver is used to receive and process the second output signal to form a fourth output signal, and the processing component is used to obtain parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal.

[0018] In some embodiments, the transmitter includes a signal source and an amplifier, the output end of the signal source is connected to the input end of the amplifier, the output end of the amplifier is connected to the antenna, and the processing component is used to adjust the power of the signal source and / or the gain level of the amplifier according to the third output signal to adjust the parameters of the radio frequency signal.

[0019] In some embodiments, the signal source includes a radio frequency phase-locked loop, a phase shifter, and an adjustable attenuator, the radio frequency phase-locked loop is connected to the processing component, and the radio frequency phase-locked loop is used to output the radio frequency signal;

[0020] The phase shifter is connected to the output end of the radio frequency phase-locked loop, and is used to adjust the phase of the radio frequency signal output by the radio frequency phase-locked loop;

[0021] The adjustable attenuator is connected to the output end of the phase shifter and the input end of the amplifier, and is used to perform gain adjustment on the radio frequency signal output by the phase shifter.

[0022] In some embodiments, the receiver includes a mixer and a processing unit, wherein a first input terminal of the mixer is connected to the switch component, a second input terminal of the mixer is connected to the processing component, an output terminal of the mixer is connected to the processing unit, and the processing component is connected to the processing unit;

[0023] When the receiver is connected to the second coupler, the mixer is configured to convert the second output signal into a fifth output signal, and the processing unit is configured to process the fifth output signal to form the fourth output signal.

[0024] In some embodiments, the processing unit includes a digital signal link unit and an analog-to-digital converter, the input end of the analog-to-digital converter is connected to the output end of the mixer, and the output end of the analog-to-digital converter is connected to the digital signal link unit.

[0025] In some embodiments, the receiver further includes an adjustable amplifier, an input end of the adjustable amplifier is connected to the switch element, and an output end of the adjustable amplifier is connected to the first input end of the mixer.

[0026] In some embodiments, the fifth output signal is a zero intermediate frequency signal.

[0027] A testing method according to an embodiment of the present application includes:

[0028] Get test instructions;

[0029] When the test instruction is a first test instruction, a first test is performed, where the first test includes:

[0030] controlling the switching element to connect the receiver to the first coupler and disconnect the receiver from the second coupler;

[0031] When the test instruction is a second test instruction, a second test is performed, where the second test includes:

[0032] The switch is controlled to disconnect the receiver from the first coupler and connect the receiver to the second coupler.

[0033] The above test method can control the switch to connect the receiver to the first coupler or the second coupler to perform different tests, thereby achieving the sharing of the transmitter's power detection channel and the broadband receiving channel for radiated interference, thereby reducing hardware costs.

[0034] In certain embodiments, the first test further comprises:

[0035] Controlling the transmitter to output a radio frequency signal and controlling the device under test to start, wherein the radio frequency signal is fed into the test cavity via the antenna, and the device under test is accommodated in the test cavity;

[0036] controlling the receiver to receive and process the first output signal output by the first coupler to form a third output signal;

[0037] adjusting the parameters of the radio frequency signal according to the third output signal, and controlling the transmitter to output the radio frequency signal according to the adjusted parameters of the radio frequency signal;

[0038] The second test also includes:

[0039] Controlling the device under test to start, and the antenna to receive electromagnetic waves radiated by the device under test;

[0040] The receiver is controlled to receive and process the second output signal output by the second coupler to form a fourth output signal, and parameters of the electromagnetic wave radiated by the device under test are obtained according to the fourth output signal.

[0041] In some embodiments, the transmitter includes a signal source and an amplifier, and adjusting the parameters of the radio frequency signal according to the third output signal includes:

[0042] According to the third output signal, the power of the signal source and / or the gain level of the amplifier are adjusted to adjust the parameters of the radio frequency signal.

[0043] In some embodiments, the receiver includes a mixer;

[0044] Controlling the receiver to receive and process the second output signal output by the second coupler to form a fourth output signal includes: controlling the mixer to convert the second output signal into a fifth output signal, and processing the fifth output signal to form the fourth output signal.

[0045] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0047] FIG1 is a schematic structural diagram of a test device according to an embodiment of the present application;

[0048] FIG2 is an exploded schematic diagram of a testing device according to an embodiment of the present application;

[0049] FIG3 is a schematic diagram of a module of a test device according to an embodiment of the present application;

[0050] FIG4 is a schematic diagram of a module of a signal source according to an embodiment of the present application;

[0051] 5 to 7 are flow charts of the testing method according to the embodiment of the present application.

[0052] Component symbol explanation: Test equipment 200, test cavity 10, RF module 20, antenna 30, processing component 40, control panel 50, door 60, electrical room 70, heat dissipation component 80, power supply module 90, test cavity 102, opening 104, transmitter 202, receiver 204, first coupler 206, second coupler 208, switching element 210, connecting part 212, signal source 214, amplifier 216, RF phase-locked loop 218, phase shifter 220, adjustable attenuator 222, mixer 224, processing unit 226, digital signal link unit 228, analog-to-digital converter 230, adjustable amplifier 232, display screen 502, air guide 802, heat dissipation fan 804, air inlet 806, air outlet 808. DETAILED DESCRIPTION

[0053] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections. They can be mechanical or electrical connections. They can be directly connected or indirectly connected through an intermediary. They can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0056] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0057] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0058] Referring to Figures 1 to 3, a test device 200 according to an embodiment of the present application includes a test cavity 10, a radio frequency module 20, an antenna 30, and a processing component 40. A test cavity 102 is provided in the test cavity 10, and the test cavity 102 is used to accommodate the device under test. The radio frequency module 20 includes a transmitter 202, a receiver 204, a first coupler 206, a second coupler 208, and a switching element 210. The transmitter 202 is used to output a radio frequency signal, and the first coupler 206 is used to collect the radio frequency signal output by the transmitter 202. The antenna 30 is used to feed the radio frequency signal into the test cavity 102 and to receive the electromagnetic waves radiated by the device under test. The second coupler 208 is used to collect the electromagnetic waves radiated by the device under test received by the antenna 30. The processing component 40 connects the transmitter 202, the receiver 204, and the switching element 210, and the processing component 40 is used to control the switching element 210 to connect the receiver 204 to the first coupler 206 or to connect the receiver 204 to the second coupler 208.

[0059] In the above-mentioned test device 200, the processing component 40 can control the switch 210 to connect the receiver 204 to the first coupler 206 or to connect the receiver 204 to the second coupler 208. When the receiver 204 is connected to the first coupler 206, the test device 200 can use the receiver 204 to detect the RF signal output by the transmitter 202 during the EMS (Electro Magnetic Susceptibility) test, thereby realizing the use of the receiver 204 to detect the RF signal and perform closed-loop control on the RF signal. When the receiver 204 is connected to the second coupler 208, the test device 200 can perform EMI (Electro Magnetic Interference) testing. That is, during the EMS RF signal detection, the EMI test receiving channel is used to detect the RF signal. In one embodiment, the EMI test receiving channel supports microwave signal reception and detection from 30 MHz to 18 GHz, and thus has full detection capabilities for the 30 MHz to 6 GHz transmission channel of the EMS test.

[0060] Specifically, the device under test, including but not limited to the first coupler 206, can function as a forward coupler, and the second coupler 208 can function as a backward coupler. During EMS testing, the processing component 40 controls the switching component 210 to connect the receiver 204 to the first coupler 206 and disconnect the receiver 204 from the second coupler 208 according to the EMS test instructions. The device under test is then activated, the transmitter 202 outputs an RF signal, and the antenna 30 feeds the RF signal into the test cavity 102, thereby creating an electromagnetic interference environment for the device under test and performing an EMS test on the device under test. In one embodiment, during the EMS test, a camera can be used to capture an image of the device under test, and the processing component 40 uses image processing technology to process the image of the device under test to determine whether the device under test can operate normally in the electromagnetic interference environment.

[0061] During the EMI test, the processing component 40 controls the switching component 210 according to the EMI test instructions to connect the receiver 204 to the second coupler 208 and disconnect the receiver 204 from the first coupler 206. The DUT is started and radiates electromagnetic waves in the test cavity 102. The antenna 30 receives the electromagnetic waves radiated by the DUT. The second coupler 208 collects the electromagnetic waves radiated by the DUT received by the antenna 30 and forms a coupled signal. The coupled signal is input to the receiver 204 for processing.

[0062] In Figure 2 , test cavity 10 is rectangular, and test cavity 102 is also rectangular. It will be appreciated that the shapes of test cavity 10 and test cavity 102 are not limited to rectangular and can also be other regular or irregular shapes, which are not specifically limited here. Optionally, test cavity 10 is made of a material that shields RF signals, such as a metal cavity. Furthermore, test cavity 10 can include a plastic body and a metal layer covering the body to reduce manufacturing costs and weight.

[0063] Optionally, antenna 30 may extend entirely or partially into test cavity 102. Antenna 30 may be any type of antenna 30, such as an array antenna 30, and is not specifically limited herein. The number of antennas 30 may be one, two, or more, and is not specifically limited herein. Optionally, antenna 30 is a broadband antenna 30.

[0064] The switching member 210 is connected to the receiver 204. The switching member 210 has a movable connecting part 212. The processing component 40 can control whether the connecting part 212 is connected to the first coupler 206 or the second coupler 208 according to the test requirements. When the connecting part 212 is connected to the first coupler 206, the receiver 204 is connected to the first coupler 206. When the connecting part 212 is connected to the second coupler 208, the receiver 204 is connected to the second coupler 208.

[0065] In Figures 1 and 2, the test equipment 200 also includes a control panel 50 mounted on the test chamber 10, which is electrically connected to the RF module 20. The control panel 50 may include operating components such as buttons and a touch screen. The operator can use these operating components to set the test type and RF signal parameters, such as the frequency, phase, and power of the RF signal, to generate multiple RF signals within a certain frequency band, thereby simulating complex electromagnetic interference scenarios that the device under test may encounter in a real environment.

[0066] Testing equipment 200 also includes a door 60, an electrical compartment 70, and a heat sink assembly 80. An opening 104 is provided on one side of a test chamber 102. Door 60 is rotatably mounted at opening 104 to open or close it. When door 60 is open to opening 104, an operator can place or retrieve a test object. When door 60 is closed, testing can proceed.

[0067] The electrical chamber 70 is located outside the test cavity 102, and the heat sink assembly 80 and the RF module 20 are located within the electrical chamber 70. The heat sink assembly 80 is used to dissipate heat from the RF module 20 and other components located within the electrical chamber 70. In one embodiment, the heat sink assembly 80 can dissipate heat from the RF module 20 using liquid cooling. In one embodiment, the heat sink assembly 80 can dissipate heat from the RF module 20 using air cooling. In one embodiment, the heat sink assembly 80 can dissipate heat from the RF module 20 using both liquid cooling and air cooling.

[0068] In FIG2 , the heat dissipation assembly 80 includes an air guide 802 and a heat dissipation fan 804. The air guide 802 covers the RF module 20 and is provided with an air inlet 806 and an air outlet 808. The air inlet 806 is provided corresponding to the heat dissipation fan 804. In this way, the heat dissipation assembly 80 can dissipate heat from the RF module 20 by air cooling.

[0069] The test equipment 200 also includes a power supply module 90 located in the electrical room 70. The power supply module 90 is electrically connected to the RF module 20 and the heat dissipation fan 804. The power supply module 90 is located above the air guide 802 and is thermally connected to the air guide 802. In this way, the power supply module 90 can be cooled to ensure that the power supply module 90 operates within a normal temperature range. The power supply module 90 is electrically connected to various components and parts of the test equipment 200, including but not limited to the RF module 20, the control panel 50, the heat dissipation component 80, etc. A socket is also provided in the test cavity 102. The power supply module 90 can also be electrically connected to the socket in the test cavity 102. The power supply plug of the device under test can be inserted into the socket so that the power supply module 90 can provide the device under test with the electrical energy (DC and / or AC) required for operation to enable the device under test to work, thereby allowing the device under test to undergo EMC (Electromagnetic Compatibility) testing.

[0070] In some embodiments, the first coupler 206 is used to collect the radio frequency signal output by the transmitter 202 and form a first output signal. The second coupler 208 is used to collect the electromagnetic waves radiated by the device under test and received by the antenna 30 and form a second output signal.

[0071] When the receiver 204 is connected to the first coupler 206, the receiver 204 is used to receive and process the first output signal to form a third output signal, and the processing component 40 is used to adjust the parameters of the RF signal according to the third output signal, and control the transmitter 202 to output the RF signal according to the adjusted parameters of the RF signal.

[0072] When the receiver 204 is connected to the second coupler 208 , the receiver 204 is configured to receive and process the second output signal to form a fourth output signal, and the processing component 40 is configured to obtain parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal.

[0073] In this way, the RF signal can be adjusted during EMS testing, and EMI testing can be performed on the device under test.

[0074] Specifically, when the receiver 204 is connected to the first coupler 206, the processing component 40 can adjust the parameters of the RF signal according to the third output signal output by the receiver 204, and control the transmitter 202 to output the RF signal according to the parameters of the adjusted RF signal, thereby realizing closed-loop control of the RF signal in the EMS (Electro Magnetic Susceptibility) test, so that the RF signal meets the EMS test requirements. When the receiver 204 is connected to the second coupler 208, the processing component 40 can obtain the parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal output by the receiver 204, thereby realizing EMI (Electro Magnetic Interference) testing of the device under test.

[0075] The first coupler 206 collects the transmission power of the RF signal output by the transmitter 202 to form a coupled signal. Specifically, the first coupler 206 can couple a certain proportion of the RF signal from the RF signal output by the transmitter 202 (for example, if the transmitter 202 outputs a 50W RF signal, the first coupler 206 can couple an RF signal equivalent to 0.5W) to form a first output signal. The first output signal is input to the receiver 204. After receiving the first output signal, the receiver 204 converts it into a third output signal, such as a voltage signal. The third output signal is input to the processing component 40. The RF signal includes, but is not limited to, RF signals in the microwave frequency band.

[0076] The receiver 204 can receive and process the first output signal to form a third output signal. Optionally, the third output signal can be a digital signal to facilitate processing by the processing component 40. The processing component 40 stores a correction relationship (such as a correction table), which includes multiple sets of correspondences between the size of the third output signal (such as voltage size) and the parameters of the radio frequency signal (such as power). Each set of correspondences can meet different test requirements. The correction table can be pre-calibrated through simulation, testing, etc. The power of the radio frequency signal is related to the field strength value of the electromagnetic field formed in the test cavity 102. In one example, in the EMS test, the test range of the field strength value is 3V / meter to 10V / meter.

[0077] As an example, in the calibration relationship, one set of corresponding relationships is that the power of the radio frequency signal is 100W and corresponds to the third output signal of 1V.

[0078] When the test requirement is for the RF signal output power to be 100W, processing component 40 issues a control instruction to transmitter 202. Transmitter 202, in accordance with the control instruction, outputs a 100W RF signal. First coupler 206 collects the RF signal to form a first output signal, which is then transmitted to receiver 204. Receiver 204 processes the first output signal to form a third output signal. If the third output signal is 0.8V, processing component 40 determines, based on the calibration relationship, that the RF signal power needs to be adjusted (increased) and issues an adjustment instruction to transmitter 202. Transmitter 202 increases the RF signal power in accordance with the adjustment instruction until the third output signal is 1V or close to 1V.

[0079] If the third output signal is 1V, or close to 1V, the processing component 40 maintains the current operating state of the transmitter 202 without adjusting the power of the RF signal.

[0080] During the EMI test, the processing component 40 controls the switching component 210 according to the EMI test instructions to connect the receiver 204 to the second coupler 208 and disconnect the receiver 204 from the first coupler 206. The DUT is started and radiates electromagnetic waves in the test cavity 102. The antenna 30 receives the electromagnetic waves radiated by the DUT. The second coupler 208 collects the electromagnetic waves radiated by the DUT received by the antenna 30 and forms a coupled signal, which is input into the receiver 204.

[0081] Specifically, the second coupler 208 can couple a certain proportion of the electromagnetic waves received by the antenna 30 to form a second output signal. The second output signal is input to the receiver 204. After receiving the second output signal, the receiver 204 converts it into a fourth output signal, such as a voltage signal. The fourth output signal is input to the processing component 40.

[0082] Receiver 204 can receive and process the second output signal to form a fourth output signal. Optionally, the fourth output signal can be a digital signal to facilitate processing by processing component 40. Processing component 40 obtains electromagnetic wave parameters radiated by the device under test based on the fourth output signal. Specifically, processing component 40 stores multiple sets of correspondences between the magnitude of the fourth output signal (e.g., voltage) and electromagnetic wave parameters (e.g., field strength), each set of correspondences meeting different testing requirements. These correspondences can be pre-calibrated through simulation, testing, and other methods.

[0083] For example, a correspondence relationship is that a field strength value of 4 V / m corresponds to a fourth output signal of 0.5 V. When the fourth output signal obtained by the processing component 40 is 0.5 V, based on the above correspondence relationship, the processing component 40 can determine that the field strength value of the electromagnetic wave output by the device under test is 4 V / m. The processing component 40 may include a processor.

[0084] In some embodiments, referring to FIG. 3 , the transmitter 202 includes a signal source 214 and an amplifier 216 , wherein the output of the signal source 214 is connected to the input of the amplifier 216 , and the output of the amplifier 216 is connected to the antenna 30 . The processing component 40 is configured to adjust the power of the signal source 214 and / or the gain level of the amplifier 216 according to the third output signal to adjust the parameters of the RF signal.

[0085] In this way, the parameters of the radio frequency signal can be adjusted.

[0086] Specifically, the signal source 214 can generate a radio frequency signal according to the control instruction issued by the processing component 40. The output end of the amplifier 216 is connected to the antenna 30. The signal source 214 generates a radio frequency signal, the amplifier 216 amplifies the radio frequency signal, and the antenna 30 feeds the amplified radio frequency signal into the test cavity 102.

[0087] When processing component 40 determines, based on the third input signal, that the RF signal requires adjustment, processing component 40 can adjust the power of signal source 214 and / or the gain level of amplifier 216 to ensure that the RF signal meets EMS testing requirements. Amplifier 216 is an adjustable amplifier 232. Transmitter 202 may include one or more amplifiers 216, which are not specifically limited herein.

[0088] In one embodiment, the processing component 40 can adjust the power level of the signal source 214 or the gain level of the amplifier 216. In one embodiment, the processing component 40 can adjust the power level of the signal source 214 or the gain level of the amplifier 216.

[0089] In certain embodiments, referring to FIG4 , signal source 214 includes a radio frequency phase-locked loop (RF PLL) 218, a phase shifter 220, and an adjustable attenuator 222. RF PLL 218 is connected to processing component 40 and is configured to output a radio frequency signal. Phase shifter 220 is connected to the output of RF PLL 218 and is configured to adjust the phase of the RF signal output by RF PLL 218. Adjustable attenuator 222 is connected to the output of phase shifter 220 and the input of amplifier 216 and is configured to adjust the gain of the RF signal output by phase shifter 220.

[0090] In this way, RF signals with different parameters can be achieved to meet different testing requirements.

[0091] Specifically, the processing component 40 may send a control instruction to the transmitter 202. The control instruction includes parameters of the RF signal, such as power and phase. The RF phase-locked loop 218 may generate a low-power RF signal according to the control instruction. For example, the power of the RF signal generated by the RF phase-locked loop 218 is less than 10W, and further, less than 1W.

[0092] The input end of the phase shifter 220 is connected to the output end of the RF PLL 218 and receives the RF signal output by the RF PLL 218. The phase shifter 220 can adjust the phase of the RF signal output by the RF PLL 218 to meet the test requirements.

[0093] The input end of the adjustable attenuator 222 is connected to the output end of the phase shifter 220. The adjustable attenuator 222 can adjust the gain of the RF signal, including amplifying the power of the RF signal, so that the RF signal can obtain preliminary power amplification. The RF signal adjusted and processed by the adjustable attenuator 222 is input to the amplifier 216 for subsequent amplification processing to obtain a RF signal with the required power.

[0094] In some embodiments, referring to FIG3 , the receiver 204 includes a mixer 224 and a processing unit 226. A first input of the mixer 224 is connected to the switch 210, a second input of the mixer 224 is connected to the processing component 40, an output of the mixer 224 is connected to the processing unit 226, and the processing component 40 is connected to the processing unit 226. When the receiver 204 is connected to the second coupler 208, the mixer 224 is configured to convert the second output signal into a fifth output signal, and the processing unit 226 is configured to process the fifth output signal to form a fourth output signal.

[0095] In this way, the electromagnetic waves received by the antenna 30 can be mixed to reduce the sampling frequency band.

[0096] Specifically, when the receiver 204 is connected to the second coupler 208 , the antenna 30 receives the electromagnetic waves radiated by the device under test, the second coupler 208 forms a second output signal, and the mixer 224 can perform mixing processing (such as first-stage mixing processing) on ​​the second output signal.

[0097] The second output signal input from the second coupler 208 to the mixer 224 is a radio frequency signal. The mixer 224 can use the local oscillator signal to convert the second output signal into a fifth output signal. For example, the local oscillator signal can be processed (e.g., subtracted) from the second output signal (radio frequency signal) to obtain the fifth output signal. The local oscillator signal can be provided by the phase-locked loop of the radio frequency module 20. In one example, through the mixing process, the 1 GHz second output signal can be reduced to a 100 MHz fifth output signal. The processing unit 226 can use a low-bandwidth device, which can reduce costs.

[0098] The processing unit 226 may convert the fifth output signal into a fourth output signal to facilitate processing by the processing component 40 .

[0099] In some embodiments, referring to FIG. 3 , the processing unit 226 includes a digital signal link unit 228 and an analog-to-digital converter 230 , wherein the input end of the analog-to-digital converter 230 is connected to the output end of the mixer 224 , and the output end of the analog-to-digital converter 230 is connected to the digital signal link unit 228 .

[0100] In this way, digital processing of the signal can be achieved.

[0101] Specifically, the analog-to-digital converter 230 can convert the fifth output signal (analog signal) output by the mixer 224 into a digital signal, which can be used as the fourth output signal. The magnitude of the digital signal can represent the field strength of the electromagnetic wave radiated by the device under test.

[0102] The digital signal link unit 228 can process the digital signal output by the analog-to-digital converter 230 to obtain a frequency spectrum corresponding to the digital signal, thereby achieving visualization processing of the digital signal.

[0103] Optionally, the control panel 50 has a display screen 502 , which can display a frequency spectrum for easy viewing by an operator.

[0104] In some embodiments, referring to FIG. 3 , the receiver 204 further includes an adjustable amplifier 232 , an input end of the adjustable amplifier 232 is connected to the switch 210 , and an output end of the adjustable amplifier 232 is connected to the first input end of the mixer 224 .

[0105] In this way, the relevant signals can be amplified to improve the test accuracy.

[0106] Specifically, the input end of adjustable amplifier 232 is connected to switch 210. Adjustable amplifier 232 can amplify the second output signal from second coupler 208 or the first output signal from first coupler 206. During subsequent processing, this can reduce test errors and improve test accuracy. The gain level of adjustable amplifier 232 is adjustable to meet different test requirements.

[0107] In some embodiments, the fifth output signal is a zero intermediate frequency (ZIF) signal.

[0108] In this way, the testing efficiency can be improved.

[0109] Specifically, mixer 224 can convert the second output signal into a zero-IF signal, bringing the RF signal to baseband without intermediate frequency modulation or demodulation, thereby improving test efficiency. The zero-IF receiver 204 has advantages such as small size, low power consumption, and ease of integration.

[0110] In summary, the test equipment 200 of the embodiment of the present application reserves a first coupler 206 and a second coupler 208 at the output end of the transmitter 202 used for radiated immunity testing. Through the couplers, the coupled signal of the RF signal's transmission power is input into the receiving channel used for radiated interference testing. Because the receiving channel in EMC testing supports microwave signal reception and detection from 30 MHz to 18 GHz, it is fully capable of detecting the 30 MHz to 6 GHz range of the transmission channel, achieving ultra-wideband power detection with a detection accuracy of 0.5 dB. Furthermore, the power detection channel of the transmitter 202 is shared with the broadband receiving channel for radiated interference, which can reduce hardware costs.

[0111] Referring to Figures 5 to 7 , a testing method according to an embodiment of the present application includes:

[0112] Step 101, obtaining a test instruction;

[0113] Step 103: If the test instruction is a first test instruction, execute a first test. The first test includes:

[0114] Step 201 , controlling the switch 210 to connect the receiver 204 to the first coupler 206 and disconnect the receiver 204 from the second coupler 208 ;

[0115] Step 105: If the test instruction is a second test instruction, execute a second test. The second test includes:

[0116] Step 301 : Control the switch 210 to disconnect the receiver 204 from the first coupler 206 and connect the receiver 204 to the second coupler 208 .

[0117] The above-mentioned testing method can control the switch 210 to connect the receiver 204 to the first coupler 206 or to connect the receiver 204 to the second coupler 208 to perform different tests, thereby achieving the sharing of the power detection channel of the transmitter 202 and the broadband receiving channel for radiated interference, thereby reducing hardware costs.

[0118] Specifically, the first test instruction may be an EMS test instruction, and the first test may be an EMS test. The second test instruction may be an EMI test instruction, and the second test may be an EMI test. The test instruction may be input by an operator on the control panel 50. The processing component 40 may parse the control instruction to determine whether the test instruction is the first test instruction or the second test instruction.

[0119] In one embodiment, when performing the first test, the processing component 40 may control the switch 210 to connect the receiver 204 to the first coupler 206 and disconnect the receiver 204 from the second coupler 208 .

[0120] In one embodiment, when performing the second test, the processing component 40 may control the switch 210 to disconnect the receiver 204 from the first coupler 206 and connect the receiver 204 to the second coupler 208 .

[0121] It should be noted that the above explanation of the implementation and beneficial effects of the testing device 200 is also applicable to the testing method of this embodiment, and to avoid redundancy, it will not be elaborated here.

[0122] In some embodiments, referring to FIG6 , the first test further includes:

[0123] Step 203: Control the transmitter 202 to output a radio frequency signal and start the device under test. The radio frequency signal is fed into the test cavity 102 via the antenna 30. The device under test is accommodated in the test cavity 102.

[0124] Step 205 , controlling the receiver 204 to receive and process the first output signal output by the first coupler 206 to form a third output signal;

[0125] Step 207: Adjust the parameters of the radio frequency signal according to the third output signal, and control the transmitter 202 to output the radio frequency signal according to the adjusted parameters of the radio frequency signal.

[0126] In this way, the radio frequency signal can be adjusted in the first test.

[0127] Specifically, in one embodiment, the processing component 40 can control the transmitter 202 to output a radio frequency signal and control the device under test to start up, for example, by controlling the power supply module 90 to supply power to the device under test to start up the device under test. The processing component 40 can control the receiver 204 to receive and process the first output signal output by the first coupler 206 to generate a third output signal. The processing component 40 can adjust the parameters of the radio frequency signal based on the third output signal and control the transmitter 202 to output the radio frequency signal based on the adjusted parameters of the radio frequency signal.

[0128] In some embodiments, referring to FIG. 7 , the second test further includes:

[0129] Step 303: Control the device under test to start, and the antenna 30 receives electromagnetic waves radiated by the device under test;

[0130] Step 305 : Control the receiver 204 to receive and process the second output signal output by the second coupler 208 to form a fourth output signal, and obtain the parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal.

[0131] In this way, EMI testing can be performed on the device under test.

[0132] Specifically, in one embodiment, the processing component 40 can control the device under test to start up, for example, by controlling the power supply module 90 to supply power to the device under test. The processing component 40 can control the receiver 204 to receive and process the second output signal output by the second coupler 208 to form a fourth output signal, and obtain parameters of the electromagnetic wave radiated by the device under test based on the fourth output signal.

[0133] In some embodiments, transmitter 202 includes a signal source 214 and an amplifier 216, and step 207 includes:

[0134] According to the third output signal, the power level of the signal source 214 and / or the gain level of the amplifier 216 are adjusted to adjust the parameters of the radio frequency signal.

[0135] In this way, the parameters of the radio frequency signal can be adjusted.

[0136] In some embodiments, the receiver 204 includes a mixer 224. Step 305 includes controlling the mixer 224 to convert the second output signal into a fifth output signal, and processing the fifth output signal to form a fourth output signal.

[0137] In this way, the electromagnetic waves received by the antenna 30 can be mixed to reduce the sampling frequency band.

[0138] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0139] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A testing device, characterized in that: Includes test chamber, RF module, antenna and processing components; A test cavity is provided in the test cavity, and the test cavity is used to accommodate the tested object; The radio frequency module includes a transmitter, a receiver, a first coupler, a second coupler and a switch, the transmitter is used to output a radio frequency signal, and the first coupler is used to collect the radio frequency signal output by the transmitter; The antenna is used to feed the radio frequency signal into the test cavity and to receive the electromagnetic wave radiated by the device under test; The second coupler is used to collect electromagnetic waves radiated by the device under test and received by the antenna; The processing component is connected to the transmitter, the receiver and the switch, and is used to control the switch to connect the receiver to the first coupler or to connect the receiver to the second coupler.

2. The test device according to claim 1, characterized in that The first coupler is used to collect the radio frequency signal output by the transmitter and form a first output signal; The second coupler is used to collect the electromagnetic waves radiated by the device under test and received by the antenna and form a second output signal; When the receiver is connected to the first coupler, the receiver is used to receive and process the first output signal to form a third output signal, and the processing component is used to adjust the parameters of the radio frequency signal according to the third output signal, and control the transmitter to output the radio frequency signal according to the adjusted parameters of the radio frequency signal; When the receiver is connected to the second coupler, the receiver is used to receive and process the second output signal to form a fourth output signal, and the processing component is used to obtain parameters of the electromagnetic wave radiated by the device under test according to the fourth output signal.

3. The testing device according to claim 2, characterized in that The transmitter includes a signal source and an amplifier, the output end of the signal source is connected to the input end of the amplifier, the output end of the amplifier is connected to the antenna, and the processing component is used to adjust the power of the signal source and / or the gain level of the amplifier according to the third output signal to adjust the parameters of the radio frequency signal.

4. The testing device according to claim 3, characterized in that The signal source comprises a radio frequency phase-locked loop, a phase shifter and an adjustable attenuator, the radio frequency phase-locked loop is connected to the processing component, and the radio frequency phase-locked loop is used to output the radio frequency signal; The phase shifter is connected to the output end of the radio frequency phase-locked loop, and the phase shifter is used to adjust the phase of the radio frequency signal output by the radio frequency phase-locked loop; The adjustable attenuator is connected to the output end of the phase shifter and the input end of the amplifier, and is used to The gain of the radio frequency signal output by the phase shifter is adjusted.

5. The testing device according to any one of claims 2 to 4, characterized in that: The receiver comprises a mixer and a processing unit, wherein a first input end of the mixer is connected to the switching element, a second input end of the mixer is connected to the processing component, an output end of the mixer is connected to the processing unit, and the processing component is connected to the processing unit; In a case where the receiver is connected to the second coupler, the mixer is used to convert the second output signal into a fifth output signal, and the processing unit is used to process the fifth output signal to form the fourth output signal.

6. The testing device according to claim 5, characterized in that The processing unit comprises a digital signal link unit and an analog-to-digital converter, wherein an input end of the analog-to-digital converter is connected to an output end of the mixer, and an output end of the analog-to-digital converter is connected to the digital signal link unit.

7. The testing device according to claim 5 or 6, characterized in that: The receiver further comprises an adjustable amplifier, an input end of the adjustable amplifier is connected to the switch element, and an output end of the adjustable amplifier is connected to the first input end of the mixer.

8. The testing device according to any one of claims 5 to 7, characterized in that: The fifth output signal is a zero intermediate frequency signal.

9. A testing method, characterized in that: include: Get test instructions; When the test instruction is a first test instruction, a first test is performed, wherein the first test includes: Controlling the switch to connect the receiver to the first coupler and disconnect the receiver from the second coupler; When the test instruction is a second test instruction, a second test is performed, wherein the second test includes: The switch is controlled to disconnect the receiver from the first coupler and connect the receiver to the second coupler.

10. The testing method according to claim 9, characterized in that: The first test also includes: Controlling the transmitter to output a radio frequency signal and controlling the device under test to start, wherein the radio frequency signal is fed into the test cavity via the antenna, and the device under test is accommodated in the test cavity; Controlling the receiver to receive and process the first output signal output by the first coupler to form a third output signal; According to the third output signal, adjusting the parameters of the radio frequency signal, and controlling the transmitter to output the radio frequency signal according to the adjusted parameters of the radio frequency signal; The second test also includes: Controlling the device under test to start, and the antenna to receive electromagnetic waves radiated by the device under test; The receiver is controlled to receive and process the second output signal output by the second coupler to form a fourth output signal, and the parameters of the electromagnetic wave radiated by the device under test are obtained according to the fourth output signal.

11. The testing method according to claim 10, characterized in that: The transmitter includes a signal source and an amplifier, and adjusting the parameters of the radio frequency signal according to the third output signal includes: According to the third output signal, the power of the signal source and / or the gain level of the amplifier are adjusted to adjust the parameters of the radio frequency signal.

12. The testing method according to claim 10 or 11, characterized in that: The receiver includes a mixer; Controlling the receiver to receive and process the second output signal output by the second coupler to form a fourth output signal includes: controlling the mixer to convert the second output signal into a fifth output signal, and processing the fifth output signal to form the fourth output signal.

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