Sensitivity interference test set and test equipment

Abstract

The utility model relates to communication test technical field, concretely relates to a sensitivity interference test device and test equipment. Sensitivity interference test device includes: conduction distribution module and control module. Control module is connected with the module of waiting for testing, and the module of waiting for testing includes a plurality of test ports, and conduction distribution module is connected with all test ports of the module of waiting for testing. When receiving the sensitivity test signal of control module, the module of waiting for testing produces non-signaling signal from at least two test ports respectively, and non-signaling signal is transmitted to conduction distribution module, and conduction distribution module distributes non-signaling signal to the remaining test port of the module of waiting for testing, and the module of waiting for testing generates receiving instruction signal when receiving non-signaling signal in each test port, and receiving instruction signal is transmitted to control module and carries out sensitivity interference test. Through the test environment construction of simplification, need not frequently replacing wiring or switching port, can detect the sensitivity interference problem in whole frequency band quickly.

Description

Technical Field

[0001] This utility model relates to the field of communication testing technology, and in particular to a sensitivity interference testing device and testing equipment. Background Technology

[0002] Mobile devices supporting cellular networks, such as cell phones or laptops, may experience uplink and downlink interference between multiple antennas during communication or high-speed data transmission. Harmonic interference, sub-harmonic noise, edge noise, and intermodulation distortion (IMD) can significantly degrade receiver sensitivity. Devices supporting uplink carrier aggregation (ULCA) or enhanced dual connectivity (ENB NR Dual Connection, EN-DC) can also experience interference between the transmitter (TX) and receiver (RX) when two antennas transmit simultaneously on different frequency bands, leading to the aforementioned desense issues and affecting signal reception quality.

[0003] To verify the aforementioned desense issues, simulated coupling tests of signaling methods are required. However, signaling verification testing necessitates setting up test environments for each system using test instruments. Manual testing is cumbersome and prone to errors, while automated testing is difficult to integrate across different scenarios, and the testing process is time-consuming and inefficient. Furthermore, the signaling test environment setup involves various wiring types, making switching between different systems cumbersome and hindering automated testing.

[0004] The above content is only used to help understand the technical solution of this utility model and does not represent an admission that the above content is prior art. Utility Model Content

[0005] The main purpose of this utility model is to provide a sensitivity interference testing device and testing equipment, which aims to solve the technical problem that the auxiliary power supply cannot distinguish the working mode of the equipment in the prior art, resulting in low efficiency.

[0006] To achieve the above objectives, the present invention provides a sensitivity interference testing device, which includes a conduction distribution module and a control module.

[0007] The control module is connected to the module under test, the module under test includes multiple test ports, and the conduction distribution module is connected to all the test ports of the module under test.

[0008] The control module is used to output a sensitivity test signal to the module under test, and the sensitivity test signal is used to instruct at least two of the test ports in the module under test to generate non-signaling signals respectively.

[0009] The transmission and distribution module is used to receive the non-signaling signal and distribute the non-signaling signal to the remaining test ports of the module under test;

[0010] The control module is also configured to receive a reception indication signal from each of the remaining test ports upon receiving the non-signaling signal, and the reception indication signal is used for sensitivity interference testing.

[0011] In one embodiment, the conduction distribution module includes: a power divider with the same number of test ports;

[0012] Each of the power dividers is connected to one of the test ports of the module under test, and all the power dividers are connected to each other.

[0013] In one embodiment, the conduction distribution module further includes: an interference simulation unit;

[0014] The interference simulation unit is connected to each of the test ports via the power divider;

[0015] The interference simulation unit is used to simulate the signal isolation between ports during module coupling testing. After simulating the signal isolation of the non-signaling signal, it is transmitted to the remaining test ports of the module under test through each of the power dividers.

[0016] In one embodiment, the interference simulation unit includes: an attenuator equal to the number of test ports and a load equal to the number of test ports;

[0017] Each of the attenuators is disposed between each of the power dividers and the corresponding test port, and each of the loads is connected to its corresponding power divider.

[0018] In one embodiment, each of the power dividers and its corresponding test port are connected via a first RF cable;

[0019] The module under test transmits the non-signaling signal to each of the power dividers via the first RF cable.

[0020] In one embodiment, each of the power dividers is connected to the others via a second RF cable;

[0021] Each of the aforementioned loads is connected to its corresponding power divider via a third RF cable;

[0022] Each of the power dividers distributes the non-signaling signals to the remaining test ports of the module under test via the second RF cable;

[0023] Each of the power dividers also transmits the non-signaling signal to the load via the third RF cable.

[0024] In one embodiment, the control module outputs a sensitivity test signal whose signal parameters correspond to the frequency band of the non-signaling signal;

[0025] The control module is also used to drive the module under test to transmit non-signaling signals in a preset frequency band by adjusting the signal parameters of the sensitivity test signal.

[0026] In one embodiment, the control module is connected to the module under test via a USB cable;

[0027] The control module sends a sensitivity test signal to the module under test via the USB cable, and receives the reception indication signal via the USB cable.

[0028] In one embodiment, the control module further includes: an automatic testing unit;

[0029] The automatic testing unit is connected to the testing control;

[0030] The automatic testing unit is also used to generate a full combination interference test signal when it receives a trigger signal from the test control, and transmit the full combination interference test signal to the module under test for automated testing of all interference frequency band combinations.

[0031] In addition, to achieve the above objectives, this utility model also proposes a testing device, which includes the sensitivity interference testing device described above.

[0032] This utility model provides a sensitivity interference testing device and equipment. The sensitivity interference testing device includes a conducted distribution module and a control module. The control module is connected to the module under test, which includes multiple test ports. The conducted distribution module is connected to all test ports of the module under test. The control module outputs a sensitivity test signal to the module under test, indicating that at least two test ports within the module under test generate non-signaling signals. The conducted distribution module receives the non-signaling signals and distributes them to the remaining test ports of the module under test. The control module also receives a reception indication signal from each of the remaining test ports upon receiving the non-signaling signals; this reception indication signal is used for sensitivity interference testing. By simplifying the test environment setup and eliminating the need for frequent wiring changes or port switching, sensitivity interference issues across the entire frequency band can be quickly detected. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the first embodiment of the sensitivity interference testing device of this utility model;

[0035] Figure 2 This is a schematic diagram of the second embodiment of the sensitivity interference testing device of this utility model;

[0036] Figure 3 This is a schematic diagram of radio frequency interference testing and analysis of the second embodiment of the sensitivity interference testing device of this utility model;

[0037] Figure 4 This is a schematic diagram of LTE band RSSI sweep frequency of the second embodiment of the sensitivity interference testing device of this utility model;

[0038] Figure 5 This is a schematic diagram of the NR band RSSI sweep frequency of the second embodiment of the sensitivity interference testing device of this utility model.

[0039] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0040] Explanation of reference numerals in the attached diagram: 10, conduction distribution module; 20, control module; 30, module under test; 101, power divider; 102, attenuator; 103, load; 201, first RF cable; 202, second RF cable; 203, third RF cable. Detailed Implementation

[0041] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0044] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0045] Reference Figure 1 , Figure 1 This is a schematic diagram of the first embodiment of the sensitivity interference testing device of this utility model. This utility model proposes a first embodiment of the sensitivity interference testing device.

[0046] In this embodiment, the sensitivity interference testing device includes a conduction distribution module 10 and a control module 20; the control module 20 is connected to the module under test 30, the module under test 30 includes multiple test ports ANT, and the conduction distribution module 10 is connected to all the test ports ANT of the module under test 30.

[0047] It should be noted that the control module 20 can be used to output a sensitivity test signal to the module under test 30. The sensitivity test signal is used to instruct at least two test ports within the module under test 30 to generate non-signaling signals respectively. The conduction and distribution module 10 is used to receive the non-signaling signals and distribute them to the remaining test ports of the module under test 30. The control module 20 is also used to receive a reception indication signal fed back by each of the remaining test ports upon receiving the non-signaling signals. The reception indication signal is used for sensitivity interference testing.

[0048] It should be understood that the control module 20 can be an electronic device with data storage, processing, and generation functions, such as a microcontroller unit (MCU) or a computer (PC). The sensitivity test signal controls at least two ports of the module under test (DUT) 30 to transmit non-signaling signals, providing a signal source for simulating inter-port interference scenarios. The sensitivity test signal can be transmitted via a USB cable, with the control module 20 connected to the DUT 30 via the USB cable. The control module 20 sends the sensitivity test signal to the DUT 30 via the USB cable and receives the Received Signal Strength Indication (RSSI) signal via the USB cable. The RSSI signal can serve as an indicator of reception quality, allowing comparison of signal reception quality under single-port and multi-port interference conditions to determine if desense (sensitivity degradation) exists. The USB interface is a universal standard interface; both the DUT 30 (such as a communication module or mobile phone) and the control module 20 can be configured with USB ports without requiring additional special interface adaptation, simplifying the test environment setup process and reducing connection complexity.

[0049] Non-signaling signals can be signals that do not involve signaling interactions with communication systems such as 3G / 4G / 5G, GNSS, Bluetooth, and Wi-Fi. Non-signaling signals can be transmitted as interference signals to simulate interference scenarios that may occur during actual operation. Transmitting at least two non-signaling signals simulates the scenario where multiple antenna ports transmit signals simultaneously during actual equipment operation, especially for equipment supporting technologies such as ULCA or EN-DC, where simultaneous transmission by two antennas on different frequency bands may cause interference.

[0050] It should be noted that the conduction and distribution module 10 can realize signal conduction and distribution between the ports of the module, thereby simulating the signal interference scenario during actual operation. When the control module 20 controls at least two ports of the module under test 30 to transmit non-signaling signals through the sensitivity test signal, the signal of the transmitting port will be fed into other ports, thereby reproducing the interference such as Harmonic, Sub-Harmonic noise, Edge noise and IMD that may occur in actual communication, generating RSSI, and at the same time providing a basis for the subsequent control module to quickly verify the desense (sensitivity degradation) problem by comparing the RSSI values ​​under single-port and multi-port interference.

[0051] Furthermore, the signal parameters of the sensitivity test signal output by the control module 20 correspond to the frequency band of the non-signaling signal. The control module 20 can also be used to drive the module under test 30 to transmit non-signaling signals in a preset frequency band by adjusting the signal parameters of the sensitivity test signal. For example, transmitting a non-signaling signal at maximum power to scan the entire frequency band of the LTE Band and the entire frequency band of the NR Band separately, and then transmitting the maximum power of the two frequency bands through non-signaling signals, recording the RSSI values ​​of the two ports. By comparing the RSSI values ​​of the LTE Band and NR Band before and after, desense problems can be quickly located.

[0052] It should be noted that the LTE Band can be a specific frequency band used by the 4G network, such as Band 1 (frequency range approximately 2100MHz) or Band 3 (approximately 1800MHz). By scanning the entire LTE Band and recording the RSSI values, the impact of interference within the 4G band on receiver sensitivity can be verified. The NR Band can be a frequency used by the 5G network, such as the n77 band (approximately 3300-4200MHz) or the n78 band (approximately 3300-3800MHz). By scanning the entire NR Band, desense issues caused by interference within the 5G band can be verified. In scenarios such as EN-DC, the device may operate simultaneously in both 4G and 5G bands. By transmitting non-signaling signals from these two bands and comparing the RSSI values, desense issues caused by cross-band interference can be quickly verified.

[0053] This embodiment proposes a sensitivity interference testing device, comprising a conducted distribution module 10 and a control module 20. The control module 20 is connected to a module under test 30, which includes multiple test ports. The conducted distribution module 10 is connected to all test ports of the module under test 30. The control module 20 outputs a sensitivity test signal to the module under test 30, indicating that at least two test ports within the module under test 30 generate non-signaling signals. The conducted distribution module 10 receives the non-signaling signals and distributes them to the remaining test ports of the module under test 30. The control module 20 also receives a reception indication signal from each of the remaining test ports upon receiving the non-signaling signals, which is used for sensitivity interference testing. By simplifying the test environment setup and eliminating the need for frequent wiring changes or port switching, sensitivity interference issues across the entire frequency band can be quickly detected.

[0054] Reference Figure 2 , Figure 2This is a schematic diagram of the second embodiment of the sensitivity interference testing device of this utility model. Based on the first embodiment of the sensitivity interference testing device described above, a second embodiment of the sensitivity interference testing device of this utility model is proposed.

[0055] In this embodiment, the conduction distribution module 10 includes: power dividers 101 with the same number as the test ports; each power divider 101 is connected to one of the test ports of the module under test 30, and all power dividers 101 are connected to each other.

[0056] It should be noted that the power divider 101 can be a passive radio frequency device capable of splitting the energy of one input signal into two or more outputs, with the amplitude, phase, and other characteristics of each output signal maintaining a specific relationship (such as equal division or proportional distribution). Through the synergistic effect of multiple power dividers 101, all radio frequency (RF) ports of the module are interconnected, ensuring that non-signaling signals transmitted from any two ports can be transmitted to other ports through the power divider 101, achieving full-port interference simulation.

[0057] Furthermore, the conduction distribution module 10 also includes an interference simulation unit; the interference simulation unit is connected to each of the test ports through the power divider 101. The interference simulation unit can be used to simulate the signal isolation between the ports during module coupling testing. After simulating the signal isolation of the non-signaling signal, it is transmitted to the remaining test ports of the module under test 30 through each of the power dividers 101.

[0058] Specifically, the interference simulation unit may include: attenuators 102 with the same number of test ports and loads 103 with the same number of test ports; each attenuator 102 is disposed between each power divider 101 and the corresponding test port, and each load 103 is connected to its corresponding power divider 101.

[0059] It should be noted that attenuator 102 can reduce the power of the RF signal by a preset ratio without changing the signal's frequency, phase, or other characteristics. By adjusting the attenuation value of attenuator 102, different signal isolation levels (i.e., the degree of attenuation of a signal coupled from one port to another) between the test ports of the module under test 30 can be simulated, reproducing the differences in interference intensity between ports caused by distance and layout differences in actual operation. For example, increasing the attenuation value can simulate a scenario with high isolation (weaker interference), while decreasing the attenuation value can simulate a scenario with low isolation (stronger interference). When the module's RF port transmits non-signaling signals, attenuator 102 can reduce the strength of the signal distributed to other ports by power divider 101, ensuring that the power of the interference signal is within a reasonable range detectable by the module under test 30, ensuring the accuracy of RSSI value readings, and avoiding test result distortion due to excessively strong or weak signals. By adjusting the attenuation value, interference conditions under different frequency bands and power combinations can be flexibly simulated (such as interference in different frequency bands in ULCA or EN-DC scenarios), meeting the requirements of full-band desense verification and providing support for locating the worst interference frequency.

[0060] Furthermore, load 103 can be a 50Ω terminating load to match the system's standard impedance, preventing signal reflection at the transmission end and ensuring that signal energy is effectively absorbed rather than reflected back into the circuit causing interference or loss. In actual operation, the test port of the module under test 30 is typically connected to an antenna (antenna impedance close to 50Ω). The 50Ω terminating load can simulate the characteristics of the antenna's load 103, making the test environment closer to the real working scenario and ensuring the accuracy of interference simulation.

[0061] It should be noted that each power divider 101 is connected to its corresponding test port ANT via a first RF cable 201; the module under test 30 transmits the non-signaling signal to each power divider 101 via the first RF cable 201. Each power divider 101 is connected to each other via a second RF cable 202; each load 103 is connected to its corresponding power divider 101 via a third RF cable 203; each power divider 101 distributes the non-signaling signal to the remaining test ports of the module under test 30 via the second RF cable 202; each power divider 101 also transmits the non-signaling signal to the load 103 via the third RF cable 203. RF cables typically have good shielding performance, which can reduce the impact of external electromagnetic interference on the transmitted signal, and at the same time prevent the radio frequency signals transmitted in the cable from interfering with the outside world. This ensures that when non-signaling signals are transmitted between the test port ANT and the power divider 101, between different power dividers 101, and between the power divider 101 and the load 30, the loss is controllable and no additional interference is introduced, thereby improving the accuracy of RSSI value reading and ensuring the reliability of the desense verification results.

[0062] In one possible implementation, the module under test 30 includes four test ports, and the conductive distribution module 10 includes four 1-to-4 power dividers 101, four attenuators 102, and four loads 103. The four test ports are respectively connected to the four 1-to-4 power dividers 101 through the corresponding four attenuators 102. One path of each 1-to-4 power divider 101 is connected to the corresponding load 103, and the other three paths of each 1-to-4 power divider 101 are respectively connected to the remaining three 1-to-4 power dividers 101. Taking the verification of desense (EN-DC_1A_n77A) caused by the coexistence of LTE and NR signals as an example, refer to... Figures 3 to 5 , Figure 3 This is a schematic diagram of radio frequency interference test analysis in the second embodiment of the sensitivity interference testing device of this utility model. The horizontal axis represents the frequency range of different frequency bands (Frequency: MHz). Band1 (B1Tx) corresponds to the LTE Band1 transmit frequency band (approximately 1930-1980MHz), and B1Rx (2110-2170MHz) is the receive frequency band of Band1. "RSSI Sweep" indicates scanning RSSI in this frequency band. n77 (3800-4200MHz) is the transmit and receive frequency band of 5G NR Band n77, and the signal strength is also scanned using "RSSI Sweep". The vertical axis represents the signal strength (RSSI / POWER: dBM), which determines the degree of influence of interference on the receiving sensitivity. Figure 4 This is a schematic diagram of LTE band RSSI frequency sweep of the second embodiment of the sensitivity interference testing device of this utility model. Figure 5 This is a schematic diagram of the NR band RSSI sweep frequency of the second embodiment of the sensitivity interference testing device of this utility model.

[0063] Furthermore, the control module 20 may further include an automatic testing unit (not shown in the figure), which is connected to the test control. The automatic testing unit can generate a full-combination interference test signal upon receiving a trigger signal from the test control, and transmit the full-combination interference test signal to the module under test 30 for automated testing of all interference frequency band combinations. The test control can be a user-triggered control component for the full-combination interference test, for example, a button or switch. By triggering the control module 20 to generate the full-combination interference test signal, all CA / DC interference combinations can be integrated into a single Desense test tool, enabling one-click full-combination interference testing.

[0064] In this embodiment, the conducted distribution module 10 includes: power dividers 101, the same number as the number of test ports; each power divider 101 is connected to one of the test ports of the module under test 30, and all power dividers 101 are interconnected. The interference simulation unit includes: attenuators 102, the same number as the number of test ports, and loads 103, the same number as the number of test ports; each attenuator 102 is disposed between each power divider 101 and its corresponding test port, and each load 103 is connected to its corresponding power divider 101. The power dividers 101 split the non-signaling signal into multiple paths and distribute them to other test ports, thereby simulating the signal coupling interference generated between ports when multiple antennas (ports) transmit signals simultaneously in actual operation. The attenuators 102 adjust the signal power to verify the accuracy of the desense, match the standard impedance of the system, and ensure the stability of signal transmission in the entire test system.

[0065] Furthermore, this embodiment of the invention also proposes a testing device. The testing device includes the sensitivity interference testing apparatus as described above.

[0066] Since the testing equipment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0067] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A sensitivity interference test device, characterized by, The sensitivity interference testing device includes: a conduction distribution module and a control module; The control module is connected to the module under test, the module under test includes multiple test ports, and the conduction distribution module is connected to all the test ports of the module under test. The control module is used to output a sensitivity test signal to the module under test, and the sensitivity test signal is used to instruct at least two of the test ports in the module under test to generate non-signaling signals respectively. The transmission and distribution module is used to receive the non-signaling signal and distribute the non-signaling signal to the remaining test ports of the module under test; The control module is also configured to receive a reception indication signal from each of the remaining test ports upon receiving the non-signaling signal, and the reception indication signal is used for sensitivity interference testing.

2. The sensitivity interference test device of claim 1, wherein, The conduction distribution module includes: a power divider with the same number of test ports; Each of the power dividers is connected to one of the test ports of the module under test, and all the power dividers are connected to each other.

3. The sensitivity interference test device of claim 2, wherein, The conduction distribution module further includes: an interference simulation unit; The interference simulation unit is connected to each of the test ports via the power divider; The interference simulation unit is used to simulate the signal isolation between ports during module coupling testing. After simulating the signal isolation of the non-signaling signal, it is transmitted to the remaining test ports of the module under test through each of the power dividers.

4. The sensitivity interference test device of claim 3, wherein, The interference simulation unit includes: an attenuator equal to the number of test ports and a load equal to the number of test ports; Each of the attenuators is disposed between each of the power dividers and the corresponding test port, and each of the loads is connected to its corresponding power divider.

5. The sensitivity interference test device of claim 4, wherein, Each of the power dividers and its corresponding test port are connected via a first RF cable; The module under test transmits the non-signaling signal to each of the power dividers via the first RF cable.

6. The sensitivity interference test device of claim 5, wherein, Each of the power dividers is connected to the other via a second RF cable; Each of the aforementioned loads is connected to its corresponding power divider via a third RF cable; Each of the power dividers distributes the non-signaling signals to the remaining test ports of the module under test via the second RF cable; Each of the power dividers also transmits the non-signaling signal to the load via the third RF cable.

7. The sensitivity interference testing device as described in claim 1, characterized in that, The control module outputs a sensitivity test signal whose signal parameters correspond to the frequency band of the non-signaling signal. The control module is also used to drive the module under test to transmit non-signaling signals in a preset frequency band by adjusting the signal parameters of the sensitivity test signal.

8. The sensitivity interference test device of claim 7, wherein, The control module is connected to the module under test via a USB cable; The control module sends a sensitivity test signal to the module under test via the USB cable, and receives the reception indication signal via the USB cable.

9. The sensitivity interference test device of claim 8, wherein, The control module further includes: an automatic testing unit; The automatic testing unit is connected to the testing control; The automatic testing unit is also used to generate a full combination interference test signal when it receives a trigger signal from the test control, and transmit the full combination interference test signal to the module under test for automated testing of all interference frequency band combinations.

10. A test apparatus, characterized by, The test device comprises a sensitivity interference test device as claimed in any of claims 1 to 9.

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