CN112839346A

CN112839346A - 5G radio frequency test interface box

Info

Publication number: CN112839346A
Application number: CN202110215232.9A
Authority: CN
Inventors: 高勇
Original assignee: Chence Beijing Technology Development Co ltd
Current assignee: Chence Beijing Technology Development Co ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2021-05-25

Abstract

The application discloses 5G radio frequency test interface box includes: the system comprises a 5G base station simulator interface group, a tested 5G terminal interface group, an extended test interface group and a path switching component for connecting the 5G base station simulator interface group and the tested 5G terminal interface group, wherein the 5G base station simulator interface group comprises a plurality of first interfaces for connecting with a 5G base station simulator; the tested 5G terminal interface group comprises a plurality of second interfaces used for being connected with the tested terminal; the extended test interface group comprises a CW interference source interface, an AWGN noise source interface and a spectrometer interface; the path switching assembly comprises a switch unit arranged between the plurality of first interfaces and the plurality of second interfaces and is used for switching channels formed between the plurality of first interfaces and the plurality of second interfaces and expanding different test modes of the test interface group; and the 5G radio frequency test interface box also comprises adjustable attenuators arranged on all the channels, and the adjustable attenuators are used for realizing attenuation control of signals in all the channels according to the received control signals.

Description

5G radio frequency test interface box

Technical Field

The application relates to the technical field of 5G radio frequency terminal testing, in particular to a 5G radio frequency testing interface box.

Background

With the coming of the 5G era, a base station adopts a large-scale antenna array, and a mobile phone also adopts a multi-antenna design, so that the requirement of beam forming can be met; the requirements for radio frequency testing of handsets change accordingly. In 4G including the former times, most mobile phones are single-antenna, even if multiple antennas exist, different antennas are selected in different regions of different operators with different frequency bands due to the multiple antennas on the frequency bands; therefore, the radio frequency test of 4G is in SISO state (i.e. single-receive single-transmit). The beamforming starting from 5G requires that a plurality of antennas work simultaneously, namely, in a MIMO state, and the phase of each antenna is different; the technology is firstly applied to the military phased array radar and is gradually popularized in the civil field. In the MIMO mode, one channel in multiple channels cannot be disconnected for measurement; it is also preferable not to set the loss of one channel to a value different from that of the other channels, which, while facilitating radio frequency testing, violates the basic operating principles of beamforming and MIMO. Therefore, one requirement of the 5G rf box is to ensure channel equalization to meet the above requirement while achieving the test function.

In the past, when a radio frequency test interface box performs radio frequency test on a mobile phone in a SISO state, a unique channel is switched to different states, and interference, loss and the like are different in different states. However, for the base station, these are all normal, just as if the handset can be near the base station, or far away by 10 km, in a city, in a countryside, or in a mountain. The base station does not change service because of the state of the handset. The reason is that the net speed on the peaked bead is expected to be the same as that of Beijing.

But in MIMO mode, for example, a handset has 8 antenna channels. Then 8 antennas complete the beam forming together and complete the diversity of the channel at the same time. If the balance is not balanced, one channel is taken out to be subjected to radio frequency testing, the insertion loss is increased, interference is added into the tested channel, a beam forming algorithm is damaged, the error rate of channel data is increased, and the 5G system looks like that the radio frequency channel is broken. Therefore, the channel will be degraded by the handset and the base station, and cannot meet the relevant requirements of the test specification. Therefore, the simple radio frequency test interface box has the problem of channel imbalance when a multi-channel extension test is carried out.

Aiming at the technical problem that the existing radio frequency test interface box in the prior art has channel imbalance when a multi-channel expansion test is carried out, an effective solution is not provided at present.

Disclosure of Invention

The invention provides a 5G radio frequency test interface box, which at least solves the technical problem that the prior radio frequency test interface box in the prior art has unbalanced channels when in multichannel extension test.

According to an aspect of the present application, there is provided a 5G rf test interface box for performing rf test on a 5G rf terminal, including: the system comprises a 5G base station simulator interface group, a tested 5G terminal interface group, an extended test interface group and a path switching component for connecting the 5G base station simulator interface group and the tested 5G terminal interface group, wherein the 5G base station simulator interface group comprises a plurality of first interfaces for connecting with a 5G base station simulator; the tested 5G terminal interface group comprises a plurality of second interfaces used for being connected with the tested 5G terminal; the extended test interface group comprises a CW interference source interface, an AWGN noise source interface and a spectrometer interface; the path switching assembly comprises a switch unit arranged between the plurality of first interfaces and the plurality of second interfaces and is used for switching channels formed between the plurality of first interfaces and the plurality of second interfaces and expanding different test modes of the test interface group; the 5G radio frequency test interface box also comprises adjustable attenuators arranged on each channel, the adjustable attenuators are used for realizing attenuation control of signals in each channel according to received control signals, and the 5G radio frequency test interface box acquires compensation data of the corresponding test mode and channel in a mode of inquiring a preset internal compensation table according to received switching test modes and switching instructions of the channels, so that the control signals are generated according to the compensation data.

Optionally, the path switching component is disposed between the 5G base station simulator interface group and the 5G terminal interface group to be tested, and includes a plurality of first lines and a plurality of first switch units connected to the plurality of first lines, where a test link between the 5G base station simulator interface group and the 5G terminal interface group to be tested can be switched by setting switch states of the plurality of first switch units, and a test link between the 5G base station simulator interface group and the 5G terminal interface group to be tested includes a first test link and a second test link, and where in an SA mode, the test link is a first test link in which the plurality of first interfaces are respectively connected to the plurality of corresponding second interfaces one by one to form independent channels; in the NSA mode, the test link is a second test link, in the second test link, a part of interfaces of the plurality of first interfaces are respectively connected with a part of interfaces of the corresponding plurality of second interfaces one by one to form independent channels, and another part of the plurality of first interfaces is connected with another part of interfaces of the corresponding plurality of second interfaces through the hybrid partitioning module.

Optionally, the 5G base station simulator interface group includes eight first interfaces, the 5G terminal interface group to be tested includes eight second interfaces in the first test link, and the eight first interfaces are respectively connected with the eight second interfaces one by one to form eight independent channels; and in the second test link, the first six interfaces of the eight first interfaces are respectively connected with the first six interfaces of the corresponding eight second interfaces one by one to form six independent channels, and the last two interfaces of the eight first interfaces are connected with the last two interfaces of the corresponding eight second interfaces through the mixing and splitting module.

Optionally, in the SA mode, the test links among the 5G base station simulator interface group, the 5G terminal interface group to be tested, and the extended test interface group include a third test link, and in the third test link, the extended test interface group is connected to the eight first interfaces and the eight second interfaces one by one, and the eight independent channels are switched to the coupling function module one by one.

Optionally, in the NSA mode, the test links among the 5G base station simulator interface group, the 5G terminal interface group to be tested, and the extended test interface group include a fourth test link, and in the fourth test link, the extended test interface group is connected to the first six interfaces of the eight first interfaces and the first six interfaces of the eight second interfaces one by one, the six independent channels are switched to the coupling function module one by one, and the extended test interface group is connected to the mixed splitting module and simultaneously connected to the last two interfaces of the eight second interfaces one by one.

Optionally, the path switching module further includes an anti-filtering harmonic interference unit disposed between the extended test interface set and the plurality of first interfaces and the plurality of second interfaces, and configured to prevent the DUT signal from causing secondary interference to the noise source signal or the interference source signal.

Optionally, the path switching component further includes a radio frequency test topology, where the radio frequency test topology includes two input interfaces and two output interfaces, and an independent channel and a mixed channel are formed between the two input interfaces and the two output interfaces.

The 5G radio frequency test interface box provided by the invention can solve the technical problem of channel imbalance when the radio frequency test interface box carries out multichannel extension test by adopting a method of table lookup at the later stage of the pre-test. In the production stage of the 5G radio frequency test interface box, a network analyzer is used for scanning each channel and recording data in each channel, wherein each channel comprises each channel between a 5G base station simulator interface group and a tested 5G terminal interface group and channels formed among the base station interface group, the tested 5G terminal interface group and an expansion test interface group when an expansion function test is carried out. And the data recorded by the network analyzer is stored in a storage module of the 5G radio frequency test interface box after calculation to form an internal compensation table. When the 5G radio frequency test interface box is delivered to a client for use, the client can send a switching instruction for switching the test mode and the channel through the software system. After the 5G radio frequency test interface box receives the switching instruction, the corresponding test mode and the compensation data of the channels are obtained in a mode of inquiring a preset internal compensation table, so that control signals are generated according to the obtained compensation data and are sent to the adjustable attenuators on the channels, the adjustable attenuators can achieve attenuation control over signals in the channels according to the received control signals, the 5G radio frequency test interface box returns results to upper-layer software after completing the operation, and the insertion loss balance among the multiple channels is achieved through the internal channels of the 5G radio frequency test interface box. Therefore, the technical problem that the radio frequency test interface box in the prior art has channel imbalance when a multi-channel extension test is carried out is solved through the mode.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic structural diagram of a 5G radio frequency test interface box in the SA mode;

FIG. 2 is a schematic structural diagram of a 5G radio frequency test interface box in NSA mode;

FIG. 3 is a schematic structural diagram of a 5G radio frequency test interface box in the present application;

FIG. 4 is a schematic structural diagram of an access noise source and an interference source of a 5G radio frequency test interface box in the present application;

fig. 5 is a schematic structural diagram of a 5G radio frequency test interface box access spectrometer in the present application;

fig. 6a to 6b are schematic structural diagrams of a 5G rf test interface box in the present application for implementing an extended test function in an SA mode;

fig. 7a to 7b are schematic structural diagrams of a 5G radio frequency test interface box in the present application, which implements an extended test function in an NSA mode; and

fig. 8 is a schematic diagram of the internal circuitry of the 5G rf test interface box of the present application.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

First, some of the nouns or terms appearing in the description of the embodiments of the present disclosure are applicable to the following explanations:

the term 1: the SA mode is 5G independent networking;

the term 2: the NSA mode is 5G non-independent networking, including LTE;

the term 3: and the function test is used for testing various operation functions of the mobile phone. For example, when a user plays a game, the mobile phone can smoothly perform ringing prompt when the user calls the phone, but the user ignores the phone because the game level is high;

the term 4: and the tested 5G terminal refers to a tested 5G terminal.

Referring to fig. 3 to 5 and 8, the present embodiment provides a 5G rf test interface box for performing an rf test on a 5G rf terminal, including: the device comprises a 5G base station simulator interface group 100, a tested 5G terminal interface group 200, extended test interface groups 510-530 and a path switching assembly 600 for connecting the 5G base station simulator interface group 100 and the tested 5G terminal interface group 200, wherein the 5G base station simulator interface group 100 comprises a plurality of first interfaces 110-180 for connecting with a 5G base station simulator. The 5G terminal interface group 200 to be tested comprises a plurality of second interfaces 210-280 used for being connected with the 5G terminal to be tested. The set of extended test interfaces 510-530 includes a CW interference source interface 510, an AWGN noise source interface 520, and a spectrometer interface 530. The path switching component 600 includes a switch unit disposed between the plurality of first interfaces 110 to 180 and the plurality of second interfaces 210 to 280, and is configured to switch channels formed between the plurality of first interfaces 110 to 180 and the plurality of second interfaces 210 to 280 and different test modes of the extended test interface groups 510 to 530, and the 5G radio frequency test interface box further includes an adjustable attenuator disposed on each channel, and the adjustable attenuator is configured to implement attenuation control on signals in each channel according to a received control signal, where the 5G radio frequency test interface box acquires compensation data of a corresponding test mode and channel by querying a preset internal compensation table according to a received switching instruction of switching the test mode and the channel, so as to generate the control signal according to the compensation data.

As described in the background art, there is a technical problem in the prior art that a radio frequency test interface box may have channel imbalance when performing a multi-channel expansion test.

To solve the technical problem in the background art, the present application provides a 5G radio frequency test interface box, which includes a 5G base station simulator interface group 100, a 5G terminal interface group 200 to be tested, extended test interface groups 510 to 530, and a path switching component 600. The 5G base station simulator interface group 100 is connected to the 5G base station simulator, and the 5G terminal interface group 200 is connected to the 5G terminal to be tested. The CW interference source interface 510 may be connected to a CW interference source, the AWGN noise source interface 520 may be connected to an AWGN noise source, and the spectrometer interface 530 may be connected to a spectrometer. The switch unit in the path switching module 600 can perform extended function test on the signal under test connected to the 5G rf test interface box.

Specifically, referring to fig. 8, for example, when one of 8 channels of the 5G base station 1 to the DUT1 is subjected to the radio frequency test, while the remaining channels are all in the direct connection state, the 8 channels are unbalanced. For simple test, the tested channel has large loss due to long path and interference is added, the channel can be degraded by the mobile phone and the base station, and only a small amount of signals are transmitted for detecting the channel quality. In this case, the channel to be tested is degraded by the mobile phone, and the related requirements of the test specification cannot be met. For example, in test specifications, a spurious test requires transmission at maximum power on the channel under test at the handset under test. Now, the degraded signal of the channel is transferred to the other 7 channels, and the tested channel is reduced in power instead, so that the requirement of the test specification is just violated. For example, in the anti-interference test of the mobile phone, the insertion loss of the remaining 7 channels of the test environment is detected, the insertion loss of the interfered channel is large, and the difference between the insertion loss and the interfered channel is at least 10dB, so that the data quality of 8 signals reaching the mobile phone is constant due to the overlarge intensity difference, the weakest signal in the test channel carries interference, and the tested receiving sensitivity is invalid false data. For a communication system adopting multiple antennas, no matter 8 antennas, 4 antennas or 2 antennas, no matter double frequency of WIFI, or multiple frequency points of OFDM technology starting from 4G to 5G, automatic adjustment among multiple antennas can suffer from degradation of a test channel in simple test. Therefore, to solve the problem of testing multiple antenna channels, equalization between channels must be introduced. The MIMO part of the 5G radio frequency test interface box is mainly responsible for solving the problem of dynamic equalization of channel attenuation. The channel equalization defined here is that 8 channels are automatically adjusted according to the maximum attenuation, no matter which test example the test software needs to perform, no matter what path change the test channel needs to pass through, and 8 channels are equalized for the base station and the handset. During equalization, the maximum transmission power condition of the spurious test can be met, the mobile phone can uniformly transmit the maximum power on 8 channels, and the spurious test does not disturb the communication between the mobile phone and the mobile phone at this time. During equalization, 8 channels of the interference test can synchronously reduce power, only the tested channel is added with an interference signal, and the processing result after the mobile phone receives the signal can objectively reflect the receiving sensitivity performance parameter of one channel under the condition of interference.

Therefore, the 5G radio frequency test interface box in the application can solve the technical problem that the channels are unbalanced when the radio frequency test interface box carries out multi-channel expansion test by adopting a method of table look-up in the later period of the pre-test. In the production stage of the 5G radio frequency test interface box, a network analyzer is used for scanning each channel and recording data in each channel, wherein each channel comprises each channel between the 5G base station simulator interface group 100 and the 5G terminal interface group 200 to be tested and channels formed among the base station interface group 100, the 5G terminal interface group 200 to be tested and the expansion test interface groups 510-530 during the expansion function test. Data recorded by the network analyzer can be stored in a storage module in the 5G radio frequency test interface box after calculation, and an internal compensation table is formed. When the 5G radio frequency test interface box is delivered to a client for use, the client can send a switching instruction for switching the test mode and the channel through the software system. After the 5G radio frequency test interface box receives the switching instruction, the corresponding test mode and the compensation data of the channels are obtained in a mode of inquiring a preset internal compensation table, so that control signals are generated according to the obtained compensation data and are sent to the adjustable attenuators on the channels, the adjustable attenuators can achieve attenuation control over signals in the channels according to the received control signals, the 5G radio frequency test interface box returns results to upper-layer software after completing the operation, and the insertion loss balance among the multiple channels is achieved through the internal channels of the 5G radio frequency test interface box. Therefore, the technical problem that the radio frequency test interface box in the prior art has channel imbalance when a multi-channel extension test is carried out is solved through the mode.

Optionally, referring to fig. 1 and fig. 2, the path switching component 600 is disposed between the 5G base station simulator interface group 100 and the 5G terminal interface group 200 to be tested, and includes a plurality of first lines and a plurality of first switch units connected to the plurality of first lines, where by setting switch states of the plurality of first switch units, a test link between the 5G base station simulator interface group 100 and the 5G terminal interface group 200 to be tested can be switched, and the test link between the 5G base station simulator interface group 100 and the 5G terminal interface group 200 to be tested includes a first test link and a second test link, and where in the SA mode, the test link is a first test link in which the plurality of first interfaces 110 to 180 are respectively connected to the plurality of corresponding second interfaces 210 to 280 one by one, so as to form independent channels; in the NSA mode, the test link is a second test link, in the second test link, a part of interfaces of the plurality of first interfaces 110 to 180 are respectively connected with a part of interfaces of the corresponding plurality of second interfaces 210 to 280 one by one to form independent channels, and another part of the plurality of first interfaces 110 to 180 is connected with another part of interfaces of the corresponding plurality of second interfaces 210 to 280 through the hybrid partitioning module 300 (i.e., a Mix module).

Referring to fig. 1 and 2, the 5G rf test interface box includes a 5G base station simulator interface group 100, a 5G terminal interface group 200 to be tested, and a path switching module 600 for connecting the 5G base station simulator interface group and the 5G terminal interface group to be tested. In the SA mode (5G independent networking), the 5G base station simulator interface group 100 is connected to the 5G base station simulator, and the test link between the 5G base station simulator interface group 100 and the 5G terminal interface group 200 to be tested is the first test link. In the first test link, a plurality of first interfaces 110-180 of the 5G base station simulator interface group 100 are respectively connected with second interfaces 210-280 of the corresponding 5G terminal interface group 200 to be tested one by one to form independent channels, so that the test of the 5G radio frequency terminal is realized. In NSA mode (5G non-independent networking, including LTE), the 5G base station simulator interface group 100 is connected to the 5G base station simulator, and the test link between the 5G base station simulator interface group 100 and the 5G terminal interface group 200 to be tested is the second test link. In the second test link, a part of the first interfaces (for example, but not limited to, the first six first interfaces 110 to 160) of the 5G base station simulator interface group are respectively connected with a part of the second interfaces (corresponding to the first six second interfaces 210 to 260) of the corresponding 5G terminal interface group to be tested one by one to form independent channels, and another part of the first interfaces (for example, the last two first interfaces 170 to 180 of the 5G base station simulator interface group are connected with another part of the second interfaces (i.e., the last two second interfaces 270 to 280) of the corresponding 5G terminal interface group to be tested through the hybrid splitting module 300 (i.e., Mix module)) so as to implement the test of the 4G and 5G radio frequency terminals.

Further, the path switching assembly includes a plurality of lines and a plurality of switching units connecting the plurality of lines. Therefore, the test links of the 5G base station simulator interface group and the 5G terminal interface group to be tested can be switched by setting the switch states of the switch units. That is, when the 5G radio frequency terminal needs to be subjected to multi-channel test, the test links of the 5G base station simulator interface group and the 5G terminal interface group to be tested are switched to the first test link by setting the switch states of the plurality of switch units. When the multi-channel test needs to be carried out on the compatible 4G and 5G radio frequency terminals, the test links of the 5G base station simulator interface group and the 5G terminal interface group to be tested are switched to a second test link by setting the switch states of the switch units. Thus, in this way, a complete set of radio frequency test system is formed, so that the multi-channel test supporting 4G and 5G can be compatible. And the technical problem that the radio frequency test interface box cannot compatibly support 4G and 5G multi-channel tests is further solved.

Optionally, the 5G base station simulator interface group 100 comprises eight first interfaces 110 to 180, the tested 5G terminal interface group 200 comprises eight second interfaces 210 to 280, and in the first test link, the eight first interfaces 110 to 180 are respectively connected with the eight second interfaces 210 to 280 one by one to form eight independent channels; in the second test link, the first six interfaces 110-160 of the eight first interfaces 110-180 are respectively connected with the first six interfaces 210-260 of the eight corresponding second interfaces 210-280 one by one to form six independent channels, and the last two interfaces 270-280 of the eight first interfaces 110-180 are connected with the last two interfaces 260-280 of the eight corresponding second interfaces 210-280 through the hybrid splitting module 300 (i.e., the Mix module).

Referring to fig. 1, in a first test link, a first interface 110 of eight first interfaces 110-180 of a 5G base station simulator interface group is connected with a corresponding second interface 210 of a tested 5G terminal interface group 200, so as to form an independent channel. The connection mode of the other seven first interfaces 120-180 and the corresponding seven second interfaces 220-280 is the same as that of the first interface 110 and the second interface 210, so that another 7 independent channels are formed. In this way a high degree of isolation between the individual channels is ensured. And automatic equalization is used in the 5G radio frequency test interface box, so that all channels can keep uniform insertion loss, and the error between the channels is less than 0.25 dB. This approach is applicable to the multi-channel SA networking state, i.e., the 5G independent networking state.

Referring to fig. 2, in the second test link, the first six first interfaces 110 to 160 of the eight first interfaces 110 to 180 are respectively connected to the first six second interfaces 210 to 260 of the corresponding eight second interfaces 210 to 280 one by one, and the connection manner is the same as that of the first interface 110 and the second interface 210, and is not described herein again. The last two first interfaces 170-180 of the eight first interfaces 110-180 are connected with the

second interfaces

270 and 280 of the second interfaces 210-280 after passing through the hybrid splitting module 300 (i.e., the Mix module). Therefore, independent channels are directly established between the 6 ports of the 5G radio frequency test interface box connected with the 5G base station simulator and the 6 ports connected with the tested mobile phone, and the other 2 channels complete the mixing and splitting of signals through the Mix module. In this way a high degree of isolation between the individual channels is thus ensured. And automatic equalization is used in the 5G radio frequency test interface box, so that all channels can keep uniform insertion loss, and the error between the channels is less than 0.25 dB. This approach is applicable to the state of multi-channel NSA networking, i.e. 5G non-independent networking, including LTE.

Optionally, in the SA mode, the test links among the 5G base station simulator interface group 100, the 5G terminal interface group 200 to be tested, and the extended test interface groups 510 to 530 include a third test link, and in the third test link, the extended test interface groups 510 to 530 are all connected to the eight first interfaces 110 to 180 and the eight second interfaces 210 to 280 one by one, so as to switch the eight independent channels to the coupling function module 400 one by one.

Specifically, referring to fig. 6a and 6b, in the third test link, 110 of the first interfaces 110 to 180 of the 5G base station simulator interface group 100 is connected to 210 of the second interfaces 210 to 280 of the corresponding 5G terminal interface group 200 to be tested through the coupling function module 400, and the remaining first interfaces 120 to 180 are connected to the corresponding second interfaces 220 to 280 one by one through the coupling function module 400, in the same connection manner as the first interfaces 110 and the second interfaces 210, which is not described herein again. In this way, the extended test function of the channel switched to the coupling function module in the SA mode (5G independent networking) is realized. And other channels which are not switched to the coupling function module are directly established between the 5G base station simulator port and the tested mobile phone port, so that high isolation between the channels can be ensured. And automatic equalization is used in the 5G radio frequency test interface box, all channels keep uniform insertion loss, and the error between the channels is less than 0.25 dB.

Optionally, in the NSA mode, the test links among the 5G base station simulator interface group 100, the 5G terminal interface group 200 to be tested, and the extended test interface groups 510 to 530 include a fourth test link, and in the fourth test link, the extended test interface groups 510 to 530 are all connected with the first six interfaces 110 to 160 of the eight first interfaces 110 to 180 and the first six interfaces 210 to 260 of the eight second interfaces 210 to 280 one by one, the six independent channels are switched to the coupling function module 400 one by one, and the extended test interface groups 510 to 530 are all connected with the hybrid splitting module 300 and are simultaneously connected with the last two interfaces 270 to 280 of the eight second interfaces 210 to 280 one by one.

Specifically, referring to fig. 7a and 7b, in the fourth test link, the first interface 110 of the first interfaces 110 to 180 of the 5G base station simulator interface group 100 is connected to the second interface 210 of the second interfaces 210 to 280 of the corresponding 5G terminal interface group 200 to be tested through the coupling function module 400, and the remaining first interfaces 120 to 160 are connected to the corresponding second interfaces 220 to 260 through the coupling function module 400 one by one, and the connection mode is the same as that of the first interface 110 and the second interface 210, which is not described herein again. The last two interfaces 170-180 of the first interfaces 110-180 are connected with the hybrid splitting module 300 (i.e. Mix module), and then connected with the second interfaces 270-280 of the corresponding tested 5G terminal interface group through the coupling function module 400. Thus, in this way, the test extension function in the NSA mode (5G non-independent networking including LTE) is realized. And impedance matching is always kept in the 5G radio frequency test interface box, automatic equalization is used, so that all channels keep uniform insertion loss, and the error between the channels is less than 0.25 dB.

Optionally, the path switching assembly 600 further includes an anti-filtering harmonic interference unit disposed between the extended test interface set 510-530 and the plurality of first interfaces 110-180 and the plurality of second interfaces 210-280 for preventing the DUT signal from causing secondary interference to the noise source signal or the interference source signal.

Specifically, referring to fig. 3 to 5, when the extended function test is performed, the signal may be interfered by harmonics. When the extended test interface groups 510-530 access CW signals (aggressor signals), the CW signals have 2 nd and 3 rd harmonics. These harmonics can fall into the frequency band of the tested handset during the scanning process, affecting the test result. Secondly, the transmitting power of the DUT is very large, if the DUT is not suppressed, the DUT enters a CW signal source, and directly interferes the CW signal source, so that a large amount of undesired clutter is generated, and a test result is interfered. Moreover, the frequency sweep range of the CW signal is wide, and the CW signal needs to be swept from 100kHz to 26GHz, so that necessary segmentation processing needs to be adopted to reduce the cost. Therefore, the 5G radio frequency test interface box sets 8 sub-modes in a CW interference source channel, and the sub-modes are divided according to the frequency to solve the problem. Similar problems exist when the extended test interface groups 510-530 access broadband noise sources. Firstly, the transmitting power of the DUT is very large, if the DUT is not suppressed, the DUT enters a broadband noise source, and directly interferes with the broadband noise source, so that a large amount of undesired clutter is generated and the test result is interfered. Secondly, the frequency bands divided by the global mobile phone are numerous at present, so that the sweep frequency range of the test signal is very wide, and necessary segmentation processing is needed to meet the technical realization. Therefore, the 5G radio frequency test interface box sets 4 sub-modes in a broadband noise source channel, and the 4 sub-modes are divided according to frequency to solve the problems. When the extended test interface groups 510-530 are connected to a frequency spectrograph, the frequency spectrum of the tested signal can be tested.

Optionally, the path switching module 600 further includes a radio frequency test topology, where the radio frequency test topology includes two input interfaces and two output interfaces, and an independent channel and a mixed channel are formed between the two input interfaces and the two output interfaces.

Specifically, referring to fig. 8, in NSA mode (5G non-independent networking, including LTE), the mobile phone includes both 4G and 5G functional modules, and 4G and 5G are switched frequently. This is further exacerbated for testing. That is, it cannot be tested by a pure 4G system, nor by a pure 5G system. In NSA mode (5G non-standalone networking, including LTE), the 5G radio frequency test interface box is compatible with both 4G and 5G, allowing the handset to work normally with the base station simulator and perform testing.

When the mobile phone is not tested (except for the SA mode) in the NSA mode (5G non-independent networking, including LTE), the mobile phone searches for the 4G base station signal first and then communicates with the 4G base station after being powered on (or undergoing signal switching). Since the handset has multiple antennas, searching for 4G signals and communicating with 4G base stations using antennas allows the antennas to be switched. Then the mobile phone applies for 5G communication to the network, when available 5G base stations are arranged around, the 5G base stations form beams to communicate with the mobile phone, and at this time, the mobile phone may abandon 4G signals and use all antennas to communicate with the 5G, and may also continue to maintain 4G. When the mobile phone is in data transmission and communication, the antenna switching can be frequently carried out according to the situation. Each antenna of the multi-antenna mobile phone is independent in function in the SA mode of 5G (5G independent networking), and each antenna port is subjected to variable work in the NSA mode (5G non-independent networking including LTE), so that the functional design of the 5G radio frequency test interface box is to meet the above requirements.

As shown in fig. 8, the rf fabric topology is an rf fabric topology compatible with 2 4G antenna interfaces, with inputs being DUT7 and DUT8, and outputs being BS7 and BS 8. The allowed topologies include: DUTs 7 to BS7, DUTs 8 to BS8, DUT7+ DUT8 to BS7+ BS8, DUTs 7 to (BS7 and BS8), DUTs 8 to (BS7 and BS8), (DUT7 and DUTs 8) to BS7, and (DUT7 and DUTs 8) to BS 8. The topology of the structure is 2-in 2-out. The interior contains 2 sections, one section being an independent channel and one section being a "split-combine" hybrid channel. Any path from 2 in to 2 out can be switched to an independent or mixed channel according to the situation. In operation, 2 ports of the base station may be configured as independent ports (one port is 4G, and one port is 5G), and the base station is also allowed to be directly configured as a mixed signal (the 2 ports include both 4G and 5G signals). If the searching process or the switching process after the mobile phone is started is too complicated, a mixed mode of a 5G radio frequency test interface box can be used. When the signaling between the base station and the mobile phone is clear, the mobile phone is switched to a proper communication state. Therefore, the design of the 5G radio frequency test interface box meets the requirements in this way. And automatic matching impedance is built in all ports, and the matching of 50Ohm is guaranteed in any topological mode. Thereby solving the problem of false test data due to signal reflection.

Therefore, the 5G radio frequency test interface box provided by the application can be matched with software to realize automatic test, the consistency of the radio frequency interface box is very good, the data distribution error of the repeated test is very small, and the beneficial effects that:

1. the application can support 8 channels at most, and the requirement of 5G multi-channel test, namely MIMO test, is met.

2. The test method and the test system solve the problem of the test terminal test when the SA mode (5G independent networking) and the NSA (5G non-independent networking including LTE) mode coexist.

3. The method and the device solve the problem of imbalance among channels in the MIMO state, and can ensure balance in any test mode.

4. The method and the device solve the problem of interference of a large signal of a test terminal to a CW interference signal source and an AWGN broadband noise source.

5 the application solves the problem of extra interference of 2-time 3-order harmonic waves of a CW interference signal source to a test terminal during broadband scanning.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a 5G radio frequency test interface box for carry out radio frequency test to 5G radio frequency terminal, its characterized in that includes: the device comprises a 5G base station simulator interface group (100), a tested 5G terminal interface group (200), an extended test interface group (510-530) and a path switching component (600) for connecting the 5G base station simulator interface group (100) and the tested 5G terminal interface group (200), wherein the path switching component (600) is used for connecting the 5G base station simulator interface group (100) and the tested 5G terminal interface group (200)

The 5G base station simulator interface group (100) comprises a plurality of first interfaces (110-180) used for being connected with a 5G base station simulator;

the 5G terminal interface group (200) to be tested comprises a plurality of second interfaces (210-280) used for being connected with the 5G terminal to be tested;

the extended test interface group (510-530) comprises a CW interference source interface (510), an AWGN noise source interface (520) and a spectrometer interface (530);

the path switching assembly (600) comprises a switch unit arranged between the plurality of first interfaces (110-180) and the plurality of second interfaces (210-280) and is used for switching channels formed between the plurality of first interfaces (110-180) and the plurality of second interfaces (210-280) and different test modes of the extended test interface groups (510-530); and

the 5G radio frequency test interface box further comprises adjustable attenuators arranged on each channel, the adjustable attenuators are used for achieving attenuation control over signals in each channel according to received control signals, the 5G radio frequency test interface box obtains compensation data of the corresponding test mode and the corresponding channel in a mode of inquiring a preset internal compensation table according to received switching test modes and switching instructions of the channels, and accordingly the control signals are generated according to the compensation data.

2. The 5G radio frequency test interface box according to claim 1, wherein the path switching component (600) is disposed between the 5G base station simulator interface group (100) and the 5G terminal interface group (200) under test, and comprises a plurality of first lines and a plurality of first switch units connecting the plurality of first lines, wherein by setting switch states of the plurality of first switch units, a test link between the 5G base station simulator interface group (100) and the 5G terminal interface group (200) under test can be switched, and a test link between the 5G base station simulator interface group (100) and the 5G terminal interface group (200) under test comprises a first test link and a second test link, and wherein

In an SA mode, the test link is a first test link, and in the first test link, the plurality of first interfaces (110-180) are respectively connected with the plurality of second interfaces (210-280) one by one to form independent channels;

in the NSA mode, the test link is a second test link, in the second test link, a part of interfaces of the first interfaces (110-180) are respectively connected with a part of interfaces of the second interfaces (210-280) one by one to form independent channels, and another part of the first interfaces (110-180) is connected with another part of interfaces of the second interfaces (210-280) through a mixing and splitting module (300).

3. The 5G radio frequency test interface box according to claim 2, wherein the 5G base station simulator interface group (100) comprises eight first interfaces (110-180), the 5G terminal interface group (200) to be tested comprises eight second interfaces (210-280), and in the first test link, the eight first interfaces (110-180) are respectively connected with the eight second interfaces (210-280) one by one to form eight independent channels; and

in a second test link, the first six interfaces (110-160) of the eight first interfaces (110-180) are respectively connected with the first six interfaces (210-260) of the eight second interfaces (210-280) one by one to form six independent channels, and the last two interfaces (270-280) of the eight first interfaces (110-180) are connected with the last two interfaces (260-280) of the eight second interfaces (210-280) through a mixing and dividing module (300).

4. The 5G radio frequency test interface box according to claim 1, wherein in SA mode, the test links between the 5G base station simulator interface group (100), the 5G terminal interface group under test (200) and the extended test interface group (510-530) comprise a third test link, and

in the third test link, the extended test interface groups (510-530) are connected with the eight first interfaces (110-180) and the eight second interfaces (210-280) one by one, and eight independent channels are switched to the coupling function module (400) one by one.

5. The 5G radio frequency test interface box according to claim 1, wherein in NSA mode, the test links between the 5G base station simulator interface group (100), the 5G terminal interface group under test (200) and the extended test interface group (510-530) comprise a fourth test link, and

in the fourth test link, the extended test interface groups (510-530) are connected with the first six interfaces (110-160) in the eight first interfaces (110-180) and the first six interfaces (210-260) in the eight second interfaces (210-280) one by one, six independent channels are switched to the coupling function module (400) one by one, and the extended test interface groups (510-530) are connected with the mixed splitting module (300) and simultaneously connected with the last two interfaces (270-280) in the eight second interfaces (210-280) one by one.

6. The 5G radio frequency test interface box according to claim 1, wherein the path switching module (600) further comprises an anti-harmonic interference unit disposed between the extended test interface group (510-530) and the plurality of first interfaces (110-180) and the plurality of second interfaces (210-280) for preventing secondary interference of DUT signals to noise source signals or interference source signals.

7. The 5G radio frequency test interface box according to claim 1, characterized in that the path switching component (600) further comprises a radio frequency test topology comprising two input interfaces and two output interfaces forming between them an independent channel and a mixed channel.