A lightweight communication terminal for OTA performance testing and verification

Abstract

This invention discloses a lightweight communication terminal for OTA performance testing and verification, comprising a terminal housing and a terminal motherboard. The terminal housing has the following mounting ports: a GSM antenna mounting port, an LTE antenna mounting port, a 5G NR antenna mounting port, and a SIM card mounting port. Each mounting port corresponds to the mounting of a detachable foldable external antenna or a SIM card. The terminal motherboard includes a baseband chip management module, an RF chip management module, a power management module, and a peripheral management module. This invention optimizes the transmission standard, improves the quality of the transmitted signal, reduces the impact of internal electromagnetic coupling, and allows for adjustable antenna polarization to meet the positioning system requirements of different anechoic chambers.

Description

Technical Field

[0001] This invention relates to a lightweight communication terminal for OTA performance testing and verification. Background Technology

[0002] To ensure the communication quality, security, and reliability of terminal devices, comprehensive testing of products is necessary. Compared to radio frequency conducted signal testing, over-the-air (OTA) testing simulates signal transmission through the air, comprehensively considering factors such as internal radiated interference, structural design, and RF chip transceiver algorithms to evaluate the antenna performance of the device under test (DUT). This includes metrics such as Total Radiated Power (TRP) and Total Isotropic Sensitivity (TIS), realistically reflecting the transmission and reception performance of wireless terminals in various complex real-world usage environments. Thanks to the application of Multiple Input Multiple Output (MIMO) and millimeter-wave technologies, 5G terminals integrate more and more transmission standards, which also brings challenges to terminal testing and certification. Originally single-function OTA anechoic chambers have gradually evolved into near-field, compact field, and plane wave systems to meet the testing needs of different products. Depending on the testing environment, OTA performance testing methods can be divided into two categories: the full anechoic chamber method and the reverberation chamber method. The anechoic chamber method is the mainstream testing solution in the industry, which can be further subdivided into combined axis systems and distributed axis systems.

[0003] Proficiency testing, as a commonly used external quality control method, is an important means of monitoring laboratory testing capabilities and assessing the reliability of measurement data. It is primarily conducted through inter-laboratory comparisons. To ensure the smooth operation of proficiency testing activities, test samples must meet stringent data consistency requirements. In actual OTA performance testing and certification, common end products include mobile phones, wireless CPEs, and smart home appliances. Smart home appliances are bulky, inconvenient to transport, and have poor performance stability, making them unsuitable as proficiency testing samples for OTA performance testing. Mobile phones and CPEs are widely used end products, small in size, and often used as "gold standard" for internal testing in the communications testing industry; they are also selected by proficiency testing organizations for comparison testing.

[0004] The main drawbacks of using mobile terminal products as OTA performance testing comparison samples are as follows:

[0005] First, mobile terminals are prone to contaminating the electromagnetic environment of the OTA anechoic chamber during testing. Mobile terminals integrate up to 10 built-in antennas, including microstrip patch antennas, slot antennas, IFA antennas, inverted-L antennas, PIFA, and ceramic antennas, almost covering the entire product. The built-in antennas have low gain, and their signal quality and transmission distance are easily affected by the surrounding electromagnetic environment. Furthermore, the complex internal circuitry of mobile terminals, coupled with the concentration of multiple antennas within the device, makes the electromagnetic environment of the OTA anechoic chamber susceptible to contamination during testing, increasing the uncertainty of the testing process.

[0006] Secondly, it's difficult to adjust the polarization of the built-in antenna in a mobile phone terminal. Because the polarization of the built-in antenna in a mobile phone terminal is difficult to determine, the three-dimensional coordinates of the combined-axis and distributed-axis anechoic chambers differ in relation to the EUT antenna polarization. This can easily introduce testing errors during OTA performance testing and verification, leading to results deviations. The built-in antenna is generally fixed to the edge of the phone's casing. In free space, testing standards reduce the deviation between the EUT's phase center and rotation axis center by specifying the three-dimensional coordinates of the mobile phone terminal. However, the three-dimensional coordinates of the anechoic chambers for combined-axis and distributed-axis systems differ, which complicates verification between different systems.

[0007] Third, electromagnetic coupling is prone to occur in mobile terminals, affecting test stability. 5G mobile terminals use multi-mode baseband chips that integrate network standards including 2G / 3G / 4G / 5G / Wi-Fi / Bluetooth. During the proficiency verification process, test prototypes need to be transported multiple times. The bumps and vibrations during transportation can easily cause unexpected coupling between the static electricity and magnetic field inside the mobile terminal and the antenna, affecting the stability of the test prototype.

[0008] CPE (Content Premises Equipment) terminal products are mainly used to convert wireless or wired broadband signals into LAN signals for use by customer terminal devices. Their use as test and comparison samples has several drawbacks: CPEs integrate multiple transmission standards, have up to 10 external antennas, resulting in low isolation between antennas. This can lead to mutual interference when different communication modules operate simultaneously, affecting communication quality. Furthermore, CPE products generally require a power adapter to operate, and the introduction of a power supply cable can emit noise during OTA performance testing, polluting the electromagnetic environment of the anechoic chamber.

[0009] For the reasons mentioned above, it is extremely difficult to select terminal samples with acceptable uniformity and stability data for laboratory comparison activities. Currently, most proficiency testing organizations use single samples for transfer. If a sample malfunctions, it needs to be returned to the factory for repair and verification, delaying the testing process. Some organizations choose to use multiple mobile terminal samples for transfer. Strictly speaking, it is difficult to meet the uniformity requirements between multiple samples. Instead, an attenuation compensation value is artificially specified for each sample to achieve an approximately uniform state. Summary of the Invention

[0010] The purpose of this invention is to provide a lightweight communication terminal for OTA performance testing and verification. The transmission standard has been modified to improve the quality of the transmitted signal, reduce the influence of electromagnetic coupling inside the terminal, and the antenna polarization can be adjusted to meet the positioning system requirements of different anechoic chambers.

[0011] The technical solution of the present invention is as follows:

[0012] A lightweight communication terminal for OTA performance testing and verification includes a terminal housing and a terminal motherboard. The terminal housing has the following mounting ports: a GSM antenna mounting port, an LTE antenna mounting port, a 5G NR antenna mounting port, and a SIM card mounting port. Each mounting port corresponds to the mounting of a detachable, foldable external antenna or a SIM card. The terminal motherboard includes a baseband chip management module, an RF chip management module, a power management module, and a peripheral management module, wherein:

[0013] The baseband chip management module includes a baseband chip for controlling and managing tasks and executing communication protocols at each layer, a channel encoder for channel coding and encryption of service information and control information, a digital signal processor for adjusting the power and frequency of the signal, and a modem for GMSK modulation or demodulation of the signal to achieve mutual conversion between baseband signal and radio frequency signal.

[0014] The radio frequency chip management module includes a radio frequency chip, a power amplifier, a filter, a duplexer, a SAW filter, and an antenna switch. It is divided into a transmit channel and a receive channel. In the transmit channel, the radio frequency chip modulates the transmit baseband signal into a transmit intermediate frequency signal. The intermediate frequency signal is converted into a radio frequency signal suitable for transmission on a wireless channel by the power amplifier and the filter. Then, it is converted into electromagnetic waves by the antenna and transmitted. In the receive channel, the antenna converts the electromagnetic waves sent by the base station into a weak current signal. The signal is sent to the duplexer or the SAW filter by the antenna switch to filter out unwanted noise and obtain a radio frequency signal. The radio frequency signal is then demodulated by the radio frequency chip and the modem and converted into baseband information.

[0015] The power management module is equipped with a battery to power the communication terminal, avoiding noise problems introduced by the power adapter power cord during OTA performance testing and reducing electromagnetic pollution in the anechoic chamber.

[0016] The peripheral management module includes an antenna RF port, a SIM card port, and a power charging port corresponding to each mounting port on the terminal housing. The antenna RF port is used to connect a detachable and foldable external antenna. The SIM card port is used to insert a test white card to establish communication between the terminal and the base station. The power charging port is used to charge the battery of the power management module and to connect to a computer for terminal debugging.

[0017] The baseband chip management module of this invention lightweights and reduces the complexity and redundancy of network standards, retaining only the GSM, FDD LTE, TD-LTE, and 5G NR network standards commonly used in OTA performance testing. This expands the space for circuit trace spacing, significantly reducing terminal power consumption and internal electromagnetic interference, better meeting the capability verification requirements of OTA performance testing, and making the verification comparison results more accurate. This invention designs independent antenna ports for GSM, LTE, and 5G NR network standards and uses detachable, foldable external antennas. Only one antenna is allowed to connect to the terminal during each test, greatly improving antenna isolation while also considering the antenna beamwidth coverage, reducing antenna coupling problems during OTA performance testing. Furthermore, the terminal antenna polarization can be easily and conveniently adjusted to better match the positioning system requirements of combined-axis and distributed-axis anechoic chambers.

[0018] The present invention also has the following preferred designs:

[0019] The power management module of the present invention adopts a lithium battery power supply system, including a lithium battery charging module, a lithium battery protection module, and a power switching circuit, wherein:

[0020] The lithium battery charging module uses a linear charger with constant current or constant voltage. When the charging current drops to 1 / 10 of the set value after reaching the final float voltage, the charging cycle is automatically terminated.

[0021] The lithium battery protection module includes a control IC, a MOSFET switch, a fuse, a resistor, and a capacitor. When the lithium battery voltage or circuit current exceeds a specified value, the control IC turns off the MOSFET switch, disconnecting the lithium battery from the external circuit.

[0022] This invention uses a built-in battery to power the communication terminal. The power switching circuit is designed to switch the system power supply to the external power source when the communication terminal is connected to an external power source, facilitating debugging and troubleshooting of the communication terminal.

[0023] The baseband chip management module and the radio frequency chip management module of this invention are combined into a single package. Providing a separate package interface can improve the signal quality of the communication terminal.

[0024] The communication terminal of this invention supports motherboard disassembly and replacement, which can facilitate the screening of test comparison samples that meet the requirements of uniformity and stability, and greatly reduce the screening cost.

[0025] The terminal housing of the present invention is equipped with a working indicator light for indicating the working status of the communication terminal.

[0026] The radio frequency management module of the present invention supports MIMO, i.e., Multiple-Input Multiple-Output, in its radio frequency front-end.

[0027] The GSM antenna mounting port, LTE antenna mounting port, and 5G NR antenna mounting port of the present invention are evenly distributed on the terminal housing.

[0028] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0029] 1. The baseband chip management module of the present invention performs lightweight trimming of complex and redundant network standards, retaining only the GSM, FDD LTE, TD-LTE and 5G NR network standards commonly used in OTA performance testing, and expands the space for circuit trace spacing, which can significantly reduce terminal power consumption and internal electromagnetic interference problems, better meet the capability verification requirements of OTA performance testing, and make the verification comparison results more accurate.

[0030] 2. This invention designs independent antenna ports for GSM, LTE, and 5G NR network standards and adopts a detachable, foldable external antenna. Only one antenna is allowed to connect to the terminal during each test, which greatly improves antenna isolation while taking into account the spatial coverage of the antenna beam, reducing antenna coupling problems during OTA performance testing. Furthermore, the terminal antenna polarization can be easily and conveniently adjusted to better match the positioning system requirements of combined-axis and distributed-axis anechoic chambers.

[0031] 3. This invention uses a built-in battery to power the communication terminal, avoiding noise problems introduced by the power adapter power cord during OTA performance testing and reducing electromagnetic pollution in the anechoic chamber.

[0032] 4. Because the baseband chip management module of this invention performs lightweight reduction of complex and redundant network standards, retaining only the GSM, FDD LTE, TD-LTE, and 5G NR network standards commonly used in OTA performance testing, the size of the terminal motherboard is reduced. Therefore, the power management module uses a rechargeable high-capacity lithium battery, which greatly enhances the terminal's battery life, meets the laboratory's need for repeated OTA performance testing of the terminal, and enhances the reliability of the test data. Attached Figure Description

[0033] Figure 1The image shows the appearance of a lightweight communication terminal for OTA performance testing and verification provided by the present invention.

[0034] Figure 2 A schematic diagram illustrating the working principle of a lightweight communication terminal for OTA performance testing and verification provided by the present invention.

[0035] Figure 3 This is a schematic diagram of the experimental configuration of the combined-axis anechoic chamber system in free space in the embodiment;

[0036] Figure 4 This is a schematic diagram of the experimental configuration of the distributed-axis anechoic chamber system in free space in the embodiment.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Terminal housing; 2-GSM antenna mounting port; 3-LTE antenna mounting port; 4-5G NR antenna mounting port; 5-SIM card mounting port; 6-Work indicator light; 7-Power charging port; 8-Removable foldable external antenna. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of the present invention.

[0040] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0041] It should be understood that the invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0042] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0043] To fully understand this invention, a detailed structure will be presented in the following description to illustrate the technical solution proposed by this invention. Optional embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0044] like Figure 1 As shown, a lightweight communication terminal for OTA performance testing and verification includes a terminal housing 1 and a terminal motherboard. The terminal housing has the following mounting ports: GSM antenna mounting port 2, LTE antenna mounting port 3, 5G NR antenna mounting port 4, and SIM card mounting port 5. Each mounting port is equipped with a detachable foldable external antenna 8 or a SIM card. Figure 2 The terminal motherboard shown includes a baseband chip management module, an RF chip management module, a power management module, and a peripheral management module, wherein:

[0045] The baseband chip management module includes a baseband chip for controlling and managing tasks and executing communication protocols at each layer, a channel encoder for channel coding and encryption of service information and control information, a digital signal processor for adjusting the power and frequency of the signal, and a modem for performing GMSK modulation or demodulation of the signal to achieve mutual conversion between baseband signal and radio frequency signal. The channel encoder uses technologies such as convolutional coding, FIRE code, parity check code, interleaving, and burst pulse formatting.

[0046] The radio frequency chip management module includes a radio frequency chip, a power amplifier, a filter, a duplexer, a SAW filter, and an antenna switch. It is divided into a transmit channel and a receive channel. In the transmit channel, the radio frequency chip modulates the transmit baseband signal into a transmit intermediate frequency signal. The intermediate frequency signal is converted into a radio frequency signal suitable for transmission on a wireless channel by the power amplifier and the filter. Then, it is converted into electromagnetic waves by the antenna and transmitted. In the receive channel, the antenna converts the electromagnetic waves sent by the base station into a weak current signal. The signal is sent to the duplexer or the SAW filter by the antenna switch to filter out unwanted noise and obtain a radio frequency signal. The radio frequency signal is then demodulated by the radio frequency chip and the modem and converted into baseband information.

[0047] The power management module is equipped with a battery to power the communication terminal.

[0048] The peripheral management module includes an antenna RF port, a SIM card port, and a power charging port corresponding to each mounting port on the terminal housing. The antenna RF port is used to connect a detachable and foldable external antenna. The SIM card port is used to insert a test white card to establish communication between the terminal and the base station. The power charging port is used to charge the battery of the power management module and to connect to a computer for terminal debugging.

[0049] In one embodiment, the power management module employs a lithium battery power supply system, including a lithium battery charging module, a lithium battery protection module, and a power switching circuit, wherein:

[0050] The lithium battery charging module uses a linear charger with constant current or constant voltage. When the charging current drops to 1 / 10 of the set value after reaching the final float voltage, the charging cycle is automatically terminated.

[0051] The lithium battery protection module includes a control IC, a MOSFET switch, a fuse, a resistor, and a capacitor. When the lithium battery voltage or circuit current exceeds a specified value, the control IC turns off the MOSFET switch, disconnecting the lithium battery from the external circuit.

[0052] The power switching circuit is used to switch the system power supply to the external power source when the communication terminal is connected to an external power source, such as connecting to a computer's USB interface, to facilitate debugging and troubleshooting of the communication terminal.

[0053] In one embodiment, the baseband chip management module and the radio frequency chip management module are packaged together. Providing a separate package interface can improve the signal quality of the communication terminal.

[0054] In one embodiment, a working indicator light 6 for indicating the working status of the communication terminal is installed on the terminal housing 1.

[0055] In one embodiment, the radio frequency management module's radio frequency front-end supports MIMO. Independent antenna ports are provided for GSM, LTE, and 5G NR network standards, and the GSM antenna mounting ports, LTE antenna mounting ports, and 5G NR antenna mounting ports are evenly distributed on the terminal housing.

[0056] The communication terminal of this invention supports motherboard disassembly and replacement, which can facilitate the screening of test comparison samples that meet the requirements of uniformity and stability, and greatly reduce the screening cost.

[0057] Experimental Application Instructions:

[0058] The YD / T 1484.1-2023 standard, "Measurement Methods for Spatial Radio Frequency Radiated Power and Receiver Performance of Wireless Terminals - Part 1: General Requirements," classifies terminal equipment into portable wireless terminals (Class A, B, and C) and wireless data terminals (Class D and E). The former is represented by mobile phones, and the latter by laptops. In free-space mode, for portable wireless terminals, the center of the three-dimensional rotation axis is the earpiece position of the EUT; for wireless data terminals, the center of the three-dimensional rotation axis is the geometric center of the EUT. Due to differences in manufacturing processes, the polarization of the built-in antennas in mobile phones and laptops is difficult to determine. This leads to differences in the positioning of the EUT antenna polarization in the three-dimensional coordinates of the combined-axis anechoic chamber and the distributed-axis anechoic chamber. During proficiency testing, these differences in EUT positioning between the two anechoic chambers introduce testing errors, resulting in outliers in some laboratory test results.

[0059] In TRP (Total Radiated Power) and TIS (Total Isotropic Receiver Sensitivity) testing, the communication antenna is primarily used for wired communication with the device under test (DUT), while the measurement antenna is used to measure the DUT's power or determine the downlink signal strength. The measurement antenna has two polarization directions: horizontal (H) and vertical (V), both of which need to be measured. The horizontal and vertical directions are switched according to the EUT antenna's polarization.

[0060] In a spherical coordinate system, the phi angle (φ) represents the angle between the projection of the measurement point onto the XY plane and the +X axis, and the theta angle (θ) represents the angle between the measurement point and the +Z axis. The EUT antenna points in the direction of the Z axis, and the XY plane is determined by the spherical coordinate system of the anechoic chamber and is a plane that rotates perpendicular to the theta angle.

[0061] The experimental configuration of the combined-axis anechoic chamber system is shown in the figure below. Figure 3 As shown, the two rotation axes of the combined axis system are interlocked. A φ-axis positioner is added to the θ-axis positioner, and the EUT antenna is placed horizontally, pointing towards the Z-axis, thus configuring the EUT antenna's vertical polarization direction. During the test, the measuring antenna is positioned at an initial theta angle. The test object rotates 360 degrees around the φ-axis for measurement. The measuring antenna moves to the next theta angle, and the above steps are repeated until the measurements of all angles within the theta angle range from 0 degrees to 180 degrees are completed (theta angle step size is 30 degrees).

[0062] Distributed-axis full anechoic chamber system configuration as follows Figure 4As shown, the two rotation axes of the distributed axis system are independent of each other. The measurement antenna rotates around the θ axis, while the EUT antenna, placed vertically and pointing towards the Z axis, rotates around the φ axis to achieve the vertical polarization configuration of the EUT antenna. During the test, the turntable is positioned at an initial phi angle, and the test antenna on the vertical ring switches sequentially at 30-degree intervals for measurement (the θ angle ranges from 150 degrees to 0 degrees, then back to 150 degrees, i.e., -150 degrees to +150 degrees). Then, the turntable rotates to the next phi angle, repeating the above steps until the measurements of all angles within the phi angle range from 0 degrees to 180 degrees are completed (the phi angle step size is 30 degrees).

[0063] The lightweight terminal provided by this invention can more accurately adapt to combined-axis anechoic chambers and distributed-axis anechoic chambers, reduce the testing uncertainty introduced by the EUT positioning system, and better meet the requirements of proficiency testing activities.

[0064] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A lightweight communication terminal for OTA performance testing and verification, comprising a terminal casing and a terminal motherboard, characterized in that, The terminal casing is provided with the following mounting ports: GSM antenna mounting port, LTE antenna mounting port, 5G NR antenna mounting port, and SIM card mounting port. Each mounting port corresponds to the installation of a detachable, foldable external antenna or SIM card. The terminal motherboard includes a baseband chip management module, an RF chip management module, a power management module, and a peripheral management module, wherein: The baseband chip management module includes a baseband chip for controlling and managing tasks and executing communication protocols at each layer, a channel encoder for channel coding and encryption of service information and control information, a digital signal processor for adjusting the power and frequency of the signal, and a modem for GMSK modulation or demodulation of the signal to achieve mutual conversion between baseband signal and radio frequency signal. The radio frequency chip management module includes a radio frequency chip, a power amplifier, a filter, a duplexer, a SAW filter, and an antenna switch. It is divided into a transmit channel and a receive channel. In the transmit channel, the radio frequency chip modulates the transmit baseband signal into a transmit intermediate frequency signal. The intermediate frequency signal is converted into a radio frequency signal suitable for transmission on a wireless channel by the power amplifier and the filter. Then, it is converted into electromagnetic waves by the antenna and transmitted. In the receive channel, the antenna converts the electromagnetic waves sent by the base station into a weak current signal. The signal is sent to the duplexer or the SAW filter by the antenna switch to filter out unwanted noise and obtain a radio frequency signal. The radio frequency signal is then demodulated by the radio frequency chip and the modem and converted into baseband information. The power management module is equipped with a battery to power the communication terminal. The peripheral management module includes an antenna RF port, a SIM card port, and a power charging port corresponding to each mounting port on the terminal housing. The antenna RF port is used to connect a detachable and foldable external antenna. The SIM card port is used to insert a test white card to establish communication between the terminal and the base station. The power charging port is used to charge the battery of the power management module and to connect to a computer for terminal debugging.

2. The lightweight communication terminal for OTA performance testing and verification according to claim 1, characterized in that: The power management module adopts a lithium battery power supply system, including a lithium battery charging module, a lithium battery protection module, and a power switching circuit, wherein: The lithium battery charging module uses a linear charger with constant current or constant voltage. When the charging current drops to 1 / 10 of the set value after reaching the final float voltage, the charging cycle is automatically terminated. The lithium battery protection module includes a control IC, a MOSFET switch, a fuse, a resistor, and a capacitor. When the lithium battery voltage or circuit current exceeds a specified value, the control IC turns off the MOSFET switch, disconnecting the lithium battery from the external circuit. The power switching circuit is used to switch the system power supply to the external power supply when the communication terminal is connected to an external power supply, which facilitates the debugging and troubleshooting of the communication terminal.

3. The lightweight communication terminal for OTA performance testing and verification according to claim 1, characterized in that: The baseband chip management module and the radio frequency chip management module are packaged together.

4. The lightweight communication terminal for OTA performance testing and verification according to claim 1, characterized in that: The terminal housing is equipped with indicator lights to indicate the working status of the communication terminal.

5. The lightweight communication terminal for OTA performance testing and verification according to claim 4, characterized in that: The radio frequency front-end of the radio frequency chip management module supports MIMO.

6. The lightweight communication terminal for OTA performance testing and verification according to claim 1, characterized in that: The GSM antenna mounting ports, LTE antenna mounting ports, and 5G NR antenna mounting ports are evenly distributed on the terminal casing.

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