CN111669232A

CN111669232A - Wireless communication equipment testing system and method based on multi-feed source compact range

Info

Publication number: CN111669232A
Application number: CN202010451148.2A
Authority: CN
Inventors: 潘冲; 魏贵明; 徐菲; 张翔; 张宇; 任宇鑫; 吴翔; 王飞龙; 乔尚兵; 李雷; 郭宇航; 刘晓龙
Original assignee: China Academy of Information and Communications Technology CAICT
Current assignee: China Academy of Information and Communications Technology CAICT
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2020-09-15
Anticipated expiration: 2040-05-25
Also published as: CN111669232B

Abstract

The application discloses wireless communication equipment test system and method based on multiple feed sources compact range, the system includes: the multi-feed-source system, the compact field reflector, the object carrying rotary table, the radio frequency box, the instrument and the control system are connected, and the object carrying rotary table, the radio frequency box and the instrument are connected with the control system, and the radio frequency box is connected with the multi-feed-source system and the instrument. In addition, the feed source arrangement modes in the multi-feed source subsystem comprise a linear mode, a T-shaped mode, a cross mode, a polygonal mode and a multi-row arrangement mode. A plurality of test channels are provided by a multi-feed source compact range, a radio frequency amplification, frequency conversion and switching link, a loading rotary table and an instrument are adapted, and a high-efficiency automatic test sampling method matched with a multi-feed source deflection angle is adopted to carry out directionality test of space radiation and receiving characteristics of wireless communication equipment and omnidirectional test covering the whole spherical surface. The measuring system has the outstanding advantages of high testing efficiency, comprehensive measurement index coverage, good repeatability, high automation degree, convenience in use and the like.

Description

Wireless communication equipment testing system and method based on multi-feed source compact range

Technical Field

The application relates to the technical field of communication measurement, in particular to a wireless communication equipment testing system and method based on a multi-feed source compact range.

Background

With the technical development of 5G communication equipment, the application of large-scale antenna arrays and the expansion to millimeter wave working frequency bands, the radio frequency performance test of wireless communication equipment such as base stations and terminals gradually changes from a conduction test to an air interface test.

With the strong demand for air interface testing technology, new testing standards are continuously being pushed out and updated. For example, TS38.141-2 and TS 38.521-2 of 3GPP define a test method and index requirements of a radio frequency air interface for a 5G base station and a terminal, respectively. In the air interface radio frequency performance test of the wireless communication equipment, a large number of directionality tests and total radiation power tests of space radiation and receiving characteristics exist, and the tests need to sample the tested equipment in all directions of a three-dimensional space.

In a single-feed compact range, only one feed source at a focus is used for measurement, a control system is provided with a radio frequency box at a required link channel, sampling is carried out on the space of the equipment to be measured in each direction, and the control system controls an instrument to carry out one-time measurement when a loading rotary table moves one step in a stepping mode or reaches an expected measurement angle position in a continuous operation mode.

For a base station test, the test frequency needs to cover 60GHz, for a terminal test, the test frequency is up to over 80GHz, and because the coverage frequency range of a single feed source is limited, in order to meet the test requirements of in-band signals and out-band signals of wireless communication equipment, a plurality of feed sources supporting other frequency bands or functions need to be configured in a single-feed-source compact range system, but in use, the plurality of feed sources cannot work simultaneously, namely after each feed source completes the required measurement task, if the feed sources with other specifications need to be replaced, the work needs to be manually replaced or replaced by the movement of a mechanical device. Taking the test of the stray omnidirectional radiation power of the transmitter as an example, after the whole spherical space sampling is completed for each external feed source, the feed sources with different frequency bands need to be replaced and then the spherical scanning is carried out, so that the spherical traversal sampling needs to be added once when the feed source is replaced once, and the efficiency is lower. For in-band measurement, although the feed source in the support band can meet the requirement of the frequency band, the test efficiency is low because each step can be only sampled once in space.

Disclosure of Invention

The embodiment of the application provides a wireless communication equipment test system based on multiple feed sources compact range, includes: many feed source subsystems, compact field plane of reflection, year thing revolving stage, radio frequency case, instrument and control system, it all links to each other with control system to carry thing revolving stage, radio frequency case, instrument, many feed source subsystems are connected to the radio frequency case input, the instrument is connected to radio frequency case output, wherein:

the device under test is used for transmitting a signal under test in a transmitter test or receiving a test signal in a receiver test; the loading rotary table is used for loading the tested equipment and adjusting the expected tested direction of the tested equipment;

the compact range reflecting surface is used for receiving test signals of various angles transmitted by the tested equipment and reflecting and outputting the test signals to the multi-feed source subsystem, or receiving signals of the multi-feed source subsystem and reflecting the signals to the tested equipment of the loading turntable;

the multi-feed source subsystem is used for receiving the test signal reflected by the compact range reflecting surface and outputting the test signal to the radio frequency box; the multi-feed subsystem and the compact field reflecting surface are matched to generate a plurality of quasi-plane waves in different directions;

the radio frequency box comprises an amplifier, a change-over switch, a combiner, a filter, a radio frequency cable and frequency conversion equipment, and is used for processing signals output by the multi-feed-source subsystem and then outputting the signals to an instrument or the multi-feed-source subsystem;

the meters comprise but are not limited to a signal generator, a spectrum analyzer, a vector network analyzer and a power meter, and are used for measuring and analyzing signals output by the radio frequency box, and the number of the meters is one or more;

and the control system is used for controlling the loading rotary table to drive the tested equipment to move, so that the expected spatial sampling direction of the tested equipment is perpendicular to the quasi equiphase plane of the quiet zone of the quasi-plane wave formed by the corresponding feed source and the reflecting surface of the multi-feed source subsystem.

Preferably, the feed source arrangement modes in the multi-feed source subsystem comprise a straight-line type, a T-shaped type, a cross type, a polygon and a multi-line arrangement mode.

Preferably, the multi-feed subsystem comprises at least 2 feeds, the feeds are arranged at the focus or at the off-focus position, and at least 1 feed is in the off-focus state.

Preferably, the feed source working frequency bands of the multi-feed source subsystem are the same frequency band or different frequency bands and are divided into an in-band working feed source and an out-of-band working feed source; the in-band working feed source is used for covering the working frequency specified by the 5G mobile communication and meeting the frequency band required by the adjacent channel leakage ratio and the spectrum emission template, and the out-band feed source is used for covering the frequency beyond the working frequency specified by the 5G mobile communication according to the requirement of a stray test.

Preferably, the polarization direction of the feed source in the multi-feed-source subsystem comprises single-linear polarization, double-linear polarization, single-circular polarization or double-circular polarization, and further comprises any polarization direction formed by adding an attenuator and a phase shifter.

Preferably, the feed source in the multi-feed source subsystem is a broadband feed source, and the ratio of the highest working frequency and the lowest working frequency of the feed source is more than or equal to 1.5.

Preferably, the input end of the radio frequency box is provided with a port supporting frequency conversion, a port supporting signal amplification or a port supporting signal filtering for connecting with the multi-feed source subsystem, and the port supporting frequency conversion, the port supporting signal amplification or the port supporting signal filtering are the same port or different ports.

The embodiment of the application also provides a wireless communication equipment testing method based on the multi-feed source compact range, which comprises the following steps:

the tested equipment transmits a test signal, the control system controls the loading rotary table to move at the same time, and the direction angle of the tested equipment loaded on the loading rotary table is adjusted so as to adjust the expected tested direction of the tested equipment;

the compact field reflecting surface receives test signals of all angles transmitted by tested equipment and reflects the test signals to the multi-feed source subsystem, or receives signals of the multi-feed source subsystem and reflects the signals to the tested equipment of the loading turntable;

the multi-feed source subsystem receives the test signal reflected by the compact field reflecting surface and outputs the test signal to the radio frequency box;

the radio frequency box processes the test signals output by the multi-feed source subsystem and outputs the test signals to the instrument, wherein the radio frequency box comprises an amplifier, a change-over switch, a combiner, a filter, a radio frequency cable and frequency conversion equipment;

the instrument performs measurement analysis on the test signal output by the radio frequency box, wherein the instrument comprises but is not limited to a signal generator, a spectrum analyzer, a vector network analyzer and a power meter.

Preferably, the multi-feed subsystem receives the test signal reflected by the compact field reflecting surface in an arrangement mode comprising a straight line shape, a T shape, a cross shape, a polygon and multiple lines.

Preferably, when the multi-feed subsystem receives the test signal reflected by the compact range reflecting surface, the multi-feed subsystem comprises at least 2 feeds, the feeds are arranged at a focus or an off-focus position, and at least 1 feed is in an off-focus state.

Preferably, the working frequency bands of the feed sources adopted by the multi-feed source subsystem are the same frequency band or different frequency bands and are divided into an in-band working feed source and an out-of-band working feed source; the in-band working feed source is used for covering the working frequency specified by the 5G mobile communication and meeting the frequency band required by the adjacent channel leakage ratio and the spectrum emission template, and the out-band feed source is used for covering the frequency beyond the working frequency specified by the 5G mobile communication according to the requirement of a stray test.

Preferably, the polarization direction of the feed source adopted in the multi-feed source subsystem comprises single-line polarization, double-line polarization, single circular polarization or double circular polarization, and further comprises any polarization direction formed by adding an attenuator and a phase shifter.

Preferably, the feed source adopted in the multi-feed source subsystem is a broadband feed source, and the ratio of the highest working frequency and the lowest working frequency of the feed source is more than or equal to 1.5.

Preferably, the radio frequency box processes the test signal output by the multi-feed subsystem through a port supporting frequency conversion, a port supporting signal amplification or a port supporting signal filtering, and outputs the test signal to the instrument, wherein the port supporting frequency conversion, the port supporting signal amplification or the port supporting signal filtering are the same port or different ports.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:

(1) the multi-feed compact field applied to the radio frequency air interface test of wireless communication can obviously improve the test efficiency.

(2) And a plurality of different arrangement realization modes of different specifications and function feed sources have better flexibility for testing.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic diagram of the system arrangement of the present invention.

Fig. 2 is an exemplary diagram of the rf box with frequency conversion, amplification and filtering ports at different ports and 1 meter connected to the rf box output.

Fig. 3 is a schematic diagram of the feed source of the present invention arranged in a straight line.

Fig. 4 is a schematic diagram of the spatial sampling rule of the measured object according to the present invention.

Fig. 5 is a schematic diagram of the feed source of the present invention arranged in a T shape.

Fig. 6 is a schematic diagram of the feed source of the present invention arranged in a cross shape.

Fig. 7 is a schematic diagram of the feed source of the present invention arranged in a polygon.

FIG. 8 is a schematic diagram of the feed source of the present invention arranged in multiple rows

FIG. 9 is a geometric schematic of the relationship of feed deflection angle to feed offset focal position of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, 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 application.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Example 1

As shown in fig. 1, a multi-feed compact range based wireless communication device testing system includes: many feed source subsystems, compact field plane of reflection, year thing revolving stage, radio frequency case, instrument and control system, it all links to each other with control system to carry thing revolving stage, radio frequency case, instrument, and many feed source subsystems are connected to the radio frequency case input, and the instrument is connected to the radio frequency case output, wherein:

the loading rotary table is used for loading the tested equipment and adjusting the expected tested direction of the tested equipment;

the compact field reflecting surface is used for receiving signals of all angles transmitted by the tested equipment and reflecting and outputting the test signals to the multi-feed source subsystem, or receiving the signals of the multi-feed source subsystem and reflecting the signals to the tested equipment of the loading turntable;

the radio frequency box comprises an amplifier, a change-over switch, a combiner, a filter, a radio frequency cable and frequency conversion equipment, and is used for processing signals output by the multi-feed-source subsystem and then outputting the processed signals to the instrument or outputting the processed signals to the multi-feed-source subsystem by the instrument;

the instruments include but not limited to a signal generator, a spectrum analyzer, a vector network analyzer and a power meter, and are used for measuring and analyzing signals output by the radio frequency box, one or more instruments such as an in-band TRP (transient power tone) measurement and an out-of-band spurious measurement pass through different feed channels, and simultaneously receive radio frequency signals transmitted by the equipment to be measured;

and the control system is used for controlling the loading turntable to drive the tested equipment to move, so that the expected spatial sampling direction of the tested equipment is perpendicular to the quasi equiphase plane of the quiet zone of the quasi-plane wave formed by the corresponding feed source and the reflecting surface of the multi-feed source subsystem.

The multi-feed subsystem of the embodiment comprises at least 2 feeds, wherein the feeds are arranged at a focus or at an off-focus position, and at least 1 feed is in an off-focus state. The focus feed source utilizes the electromagnetic wave to generate plane wave after the electromagnetic wave is reflected by a focus through a paraboloid and the optical paths of the electromagnetic wave on the antenna opening surface are equal. Deflection of the beam may occur when the offset focus feed is offset from focus. The distance of the feed source deviation focus corresponds to different deviation focus angles, when a measured object is located at a physical position, the feed source is simultaneously measured to realize measurement of different angle coverage directions, under the condition of specific measurement sampling direction quantity, the running stepping quantity of the loading rotary table can be greatly reduced, and the test efficiency is improved. The simultaneous measurement of the object to be measured in one sampling direction can be performed by channel switching cycle test through the radio frequency switch or by connecting a plurality of instruments.

The working frequency bands of the feed sources of the multi-feed source subsystem of the embodiment are the same frequency band or different frequency bands and are divided into an in-band working feed source and an out-of-band working feed source; the in-band working feed source is used for covering the working frequency specified by the 5G mobile communication and meeting the frequency band required by the adjacent channel leakage ratio and the spectrum emission template, and the out-band feed source is used for covering the frequency beyond the working frequency specified by the 5G mobile communication according to the requirement of a stray test. The polarization direction of the feed source in the multi-feed source subsystem comprises single-line polarization, double-line polarization, single circular polarization or double circular polarization, and further comprises any polarization direction formed by adding an attenuator and a phase shifter. The feed source in the multi-feed source subsystem is a broadband feed source, and the ratio of the highest working frequency and the lowest working frequency of the feed source is more than or equal to 1.5.

Meanwhile, the input end of the radio frequency box is provided with a port supporting frequency conversion, a port supporting signal amplification or a port supporting signal filtering for connecting the multi-feed source subsystem, and the port supporting frequency conversion, the port supporting signal amplification or the port supporting signal filtering are the same port or different ports. When the working frequency range of the feed source is larger than the measuring range of the measuring instrument, the feed source is connected with a port supporting frequency conversion on the incident frequency box, when the dynamic range of the system measurement is insufficient, the feed source is connected with a port with amplifying capacity, and when the measurement needs filtering, the feed source is connected with a port with filtering capacity. The frequency conversion, amplification and filtering ports may be on the same port, or on different ports, or combined with each other. The output of the radio frequency box can be accessed to 1 or more than 1 instrument in parallel, and the links of the multiple feed sources and the instruments are switched through the switching links in the radio frequency box. An example in which the frequency conversion, amplification and filtering ports are at different ports and the rf box output is connected to 1 meter is shown in fig. 2.

The determination of the relative position between the feeds is the key design of the multi-feed compact range, and the relative position relationship is determined by the geometric dimension of the reflecting surface of the compact range. As shown in fig. 9, if the angle between the coordinate system origin 6 and the non-focus offset feed source 1 and the focus offset feed source 2 is α 1, the angle between the coordinate system origin 6 and the non-focus offset feed source 1 and the focus offset feed source 4 is α 2, and F is the focal length of the compact field reflection surface, the relationship between the feed source deflection angle and the feed source focus offset position is as follows:

and the alpha 1 and alpha 2 angles are horizontal direction target measurement sampling stepping angles of the multi-feed compact range feed source.

In this embodiment, the feed source arrangement mode in the multiple feed source subsystems is a straight line. The feed sources are arranged in a straight line as shown in figure 3, the phase centers of the focus feed sources are positioned at the focal point of the reflecting surface, the other two deflection focus feed sources are respectively arranged at two sides of the focus feed sources, the distances from the phase centers of the two deflection focus feed sources to the phase centers of the focus feed sources are d, the included angles of the two deflection focus feed sources forming a dead zone equiphase plane and the focus feed sources forming a dead zone equiphase plane are theta, and the theta can be divided by pi.

When the straight line where the feed sources are arranged in a line is vertical to the rotating shaft at the rotating shaft 2 of the turntable in the figure 1, the spatial sampling rule of the measured object is as shown in the figure 4. The axis of rotation at 2 in fig. 1 is parallel to the Y axis of the coordinate system. Where N ═ pi/θ, when the focus feed sampling direction is (N-k-4,1), the off-focus sampling directions are (N-k-5,1) and (N-k-3, 1). When the rotating shaft of the object carrying turntable 2 in fig. 1 rotates 3 theta by taking Y as an axis according to the YOZ plane, the sampling directions of the focus feed source are (N-k-1,1), and the sampling directions of the deflection feed source are (N-k-2,1) and (N-k, 1). When the 2 position is covered by 2 pi, the rotating shaft at the 1 position in the figure 1 is parallel to the XOZ plane, the rotating angle phi, phi is 2 pi/M, then the 1 position is subjected to stepping movement, the sampling is repeated until the shaft 1 runs to cover pi, and finally the spherical surface equal-angle sampling covering of the measured object is finished.

When the three feed source frequency bands have the same specification or the frequency bands have different specifications but a common intersection, the three feed source frequency bands can support the same measurement content, for example, when the same-frequency band omnidirectional radiation power test is carried out, in the same manner, a single feed source compact range is adopted, a plurality of feed source compact ranges are arranged in a line with three feed sources, the turntable is stepped by 3 theta once to finish 6 sampling directions, and the single feed source needs to be stepped by 5 times and step theta at each time to finish 6 sampling. Because it is consuming time more to open and stop to carry thing revolving stage, consequently reduce step-by-step number of times and can improve efficiency of software testing by a wide margin, 2/3 can be saved to many measuring instrument measuring time can be connected to different feed sources simultaneously.

When the three feed sources have different frequency band specifications and different contents which cannot be replaced with each other are measured, for example, each feed source performs omnidirectional radiation power test on a non-intersection frequency band, the shaft 2 of the rotary table is stepped by theta, after the covering of 2 pi is completed, the shaft 1 is stepped by phi until the shaft 1 rotates to complete the covering of pi, and finally the spherical surface equal-angle sampling covering of the measured object is completed. At the moment, 3 intersection-free frequency band index tests are completed simultaneously, compared with a single-feed compact range, the feed source needs to be replaced once after 1 frequency band is completed, and one spherical surface sampling is completed. The time of changing the feed source for 2 times and completing 3 spherical sampling times are needed in time, and only 1 spherical sampling time is needed in a three-branch multi-feed-source compact range.

The number of the equally spaced feed sources arranged in a line can be two or more than three, and the sampling method is the same as the above.

In addition, when the feed source is out of focus, the reflection lines are not parallel. In order to obtain the optimal position of the offset focus of the feed source, the feed source offset focus condition is analyzed by using a geometric optics theory. If the beam deflection angle is θ, the reflection line may deviate from the θ angle during offset feeding, and a specific function may be used for optimization in order to reduce the deviation as much as possible. Considering the incident paraboloid of the parallel rays, if the position of the incident point on the paraboloid is the tangent point of the incident ray and the reflected ray (i.e. the incident ray and the reflected ray are symmetrical about the tangent plane vertical line at the position of the incident point), the reflected rays at different positions of the reflected ray approximately pass through the same point, the reflected rays of the paraboloid irradiated by the rays passing through the point always approximately point to the same direction, and the point is the optimal position point of the feed source.

Example 2

the compact field reflecting surface is used for receiving test signals of various angles transmitted by the tested equipment and reflecting and outputting the test signals to the multi-feed source subsystem, or receiving signals of the multi-feed source subsystem and reflecting the signals to the tested equipment of the loading turntable;

In this embodiment, the feed source arrangement mode in the multiple feed source subsystems is a T-shape. The feed sources are arranged in a T shape, the distances between the adjacent feed source phase centers of the T shape are d1, d2, d3, d4 and d5 respectively, and the feed source phase center is shown in figure 5. When the straight lines of the focus offset

feed sources

1, 2, 4 and 5 and the focus feed source are perpendicular to the connecting line of the focus feed source and the focus offset feed source 3, the focus feed sources and the focus offset

feed sources

1, 2, 4 and 5 are arranged in the same word in a sampling mode, as shown in fig. 5. In conjunction with FIG. 4, the focus offset feeds 4, 5 sample (N-k-1,1) and (N-k-3,1) as the focus sample corresponds to (N-k-2, 1). The offset

focus feed sources

1, 2 and 3 are not necessarily distributed at equal intervals and angles, are close to the focus feed source as far as possible, can be in-band feed sources, and can also be out-of-band feed sources and used for stray tests. Alpha 1, alpha 2, alpha 3, alpha 4 and alpha 5 are included angles between the deflection feed source and the focus feed source, and the relationship between the deflection angle of the feed source and the deflection position of the feed source is as follows:

Example 3

In this embodiment, the feed source arrangement manner in the multiple feed source subsystems is a cross. The feed sources are arranged in an equidistant cross mode, and the distance between the adjacent phase centers of the cross feed sources is d. When the straight lines of the focus offset

feed sources

1 and 2 and the focal point feed source are perpendicular to the axis 2, the focal point feed sources and the focus offset

feed sources

1 and 2 are arranged in the same word in a sampling mode, as shown in fig. 6. The five feed sources can rotate by more than 90 degrees by taking the phase center of the focus feed source as the circle center on the mechanical structure, and the

deflection feed sources

3 and 4 are horizontally arranged when the rotation is 90 degrees. The sampling modes are arranged in the same word. When the five feeds do not rotate, five simultaneous samples are also available, and in combination with fig. 4, the focus offset

feeds

1, 2, 3, 4 correspond to (N-k-1,1), (N-k-3,1), (N-k-2, M), and (N-k-2, 2) when the focus sample corresponds to (N-k-2, 1).

Example 4

the device to be tested is used for transmitting an uplink test signal; the loading rotary table is used for loading the tested equipment and adjusting the expected tested direction of the tested equipment;

In this embodiment, the feed source arrangement mode in the multi-feed source subsystem is a polygon. When the number of feeds is equal to or more than four, the feeds may be arranged in a polygonal manner. During sampling, the deflection angle of each feed source sampling is determined by the distance between the feed source and the focus, and the focus feed source has no deflection angle, as shown in fig. 7.

Example 5

In this embodiment, the feed source arrangement modes in the multiple feed source subsystems are arranged in multiple rows. When the number of feeds is equal to or more than five, the feeds may be arranged in a plurality of rows. During sampling, the deflection angle of each feed source sampling is determined by the distance between the feed source and the focus, and the focus feed source has no deflection angle, as shown in fig. 8.

Example 6

When receiving the test signal reflected by the compact field reflecting surface, the multi-feed source subsystem adopts an arrangement mode comprising a straight line shape, a T shape, a cross shape, a polygon and a plurality of lines for receiving. The analysis of the measurements received in the different arrangements is described in the above examples 1-5 and will not be described in detail here.

The multi-feed subsystem adopted by the test method of the embodiment comprises at least 2 feed sources, wherein the feed sources are arranged at a focus or at a focus offset position, and at least 1 feed source is in a focus offset state. The focus feed source utilizes the electromagnetic wave to generate plane wave after the electromagnetic wave is reflected by a focus through a paraboloid and the optical paths of the electromagnetic wave on the antenna opening surface are equal. Deflection of the beam may occur when the offset focus feed is offset from focus. The distance of the feed source deviation focus corresponds to different deviation focus angles, when a measured object is located at a physical position, the feed source is simultaneously measured to realize measurement of different angle coverage directions, under the condition of specific measurement sampling direction quantity, the running stepping quantity of the loading rotary table can be greatly reduced, and the test efficiency is improved. The simultaneous measurement of the object to be measured in one sampling direction can be performed by channel switching cycle test through the radio frequency switch or by connecting a plurality of instruments.

The feed source working frequency band of the multi-feed source subsystem adopted by the test method of the embodiment is the same frequency band or different frequency bands and is divided into an in-band working feed source and an out-of-band working feed source; the in-band working feed source is used for covering the working frequency specified by the 5G mobile communication and meeting the frequency band required by the adjacent channel leakage ratio and the spectrum emission template, and the out-band feed source is used for covering the frequency beyond the working frequency specified by the 5G mobile communication according to the requirement of a stray test. The polarization direction of the feed source in the multi-feed source subsystem comprises single-line polarization, double-line polarization, single circular polarization or double circular polarization, and further comprises any polarization direction formed by adding an attenuator and a phase shifter. The feed source in the multi-feed source subsystem is a broadband feed source, and the ratio of the highest working frequency and the lowest working frequency of the feed source is more than or equal to 1.5.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A multi-feed compact range based wireless communication device testing system, comprising: many feed source subsystems, compact field plane of reflection, year thing revolving stage, radio frequency case, instrument and control system, it all links to each other with control system to carry thing revolving stage, radio frequency case, instrument, many feed source subsystems and instrument are connected to the radio frequency case, wherein:

the compact range reflecting surface is used for receiving test signals of various angles transmitted by the tested equipment and reflecting and outputting the test signals to the multi-feed source subsystem, or receiving signals of the multi-feed source subsystem and reflecting the signals to the tested equipment on the loading turntable;

the radio frequency box comprises an amplifier, a change-over switch, a combiner, a filter, a radio frequency cable and frequency conversion equipment, and is used for processing signals output by the multi-feed-source subsystem and then outputting the processed signals to an instrument or outputting the processed signals to the multi-feed-source subsystem by the instrument;

2. The multi-feed compact range-based wireless communication device testing system of claim 1, wherein the feed arrangements in the multi-feed subsystem comprise a straight, T-shaped, cross-shaped, polygonal, and multi-row arrangement.

3. The multi-feed compact range-based wireless communication device testing system of claim 1, wherein the multi-feed subsystem comprises at least 2 feeds, wherein the feeds are arranged in focus or in off-focus positions, and wherein at least 1 feed is in an off-focus state.

4. The multi-feed compact range-based wireless communication device testing system of claim 1, wherein the feed operating bands of the multi-feed subsystems are co-band or co-band and are divided into in-band and out-of-band operating feeds.

5. The multi-feed compact-range-based wireless communication device testing system of claim 1, wherein the polarization directions of the feeds in the multi-feed subsystem comprise single-linear polarization, double-linear polarization, single circular polarization, or double circular polarization, and further comprising forming any polarization direction by adding attenuators and phase shifters.

6. The multi-feed compact range-based wireless communication device testing system of claim 1, wherein the feed in the multi-feed subsystem is a broadband feed, and the ratio of the highest operating frequency to the lowest operating frequency of the feed is greater than or equal to 1.5.

7. The multi-feed compact range based wireless communication device testing system as claimed in claim 1, wherein said rf box input is configured with a port supporting frequency translation, a port supporting signal amplification or a port supporting signal filtering for connecting to the multi-feed subsystem, and said port supporting frequency translation, port supporting signal amplification or port supporting signal filtering is the same port or different ports.

8. A wireless communication device testing method based on a multi-feed compact range is characterized by comprising the following steps:

the tested equipment transmits a test signal, the control system controls the loading rotary table to move at the same time, and the direction angle transmitted by the tested equipment loaded on the loading rotary table is adjusted so as to adjust the expected tested direction of the tested equipment;

the compact field reflecting surface receives test signals of all angles transmitted by the tested equipment and reflects the test signals to the multi-feed source subsystem, or receives signals of the multi-feed source subsystem and reflects the signals to the tested equipment on the loading turntable;

9. The method of claim 8, wherein the multi-feed subsystem receives test signals reflected from compact surfaces in an arrangement comprising a straight line, a T-shape, a cross-shape, a polygon, and a plurality of rows.

10. The method of claim 8, wherein the multi-feed subsystem receives test signals reflected from the compact reflector, the multi-feed subsystem comprising at least 2 feeds, wherein the feeds are placed in focus or in an off-focus position, and wherein at least 1 feed is in an off-focus state.

11. The multi-feed compact range-based wireless communication device testing method of claim 8, wherein the feed source working frequency bands adopted by the multi-feed source subsystem are same frequency band or different frequency bands and are divided into an in-band working feed source and an out-of-band working feed source.

12. The multi-feed compact-field-based wireless communication device testing method of claim 8, wherein the polarization directions of the feeds used in the multi-feed subsystem comprise single-line polarization, double-line polarization, single circular polarization or double circular polarization, and further comprising forming any polarization direction by adding attenuators and phase shifters.

13. The method for testing wireless communication devices based on the multi-feed compact range of claim 8, wherein the feed source adopted in the multi-feed subsystem is a broadband feed source, and the ratio of the highest working frequency and the lowest working frequency of the feed source is more than or equal to 1.5.

14. The multi-feed compact range-based wireless communication equipment testing method as claimed in claim 8, wherein the radio frequency box processes the test signals output by the multi-feed subsystem through a port supporting frequency conversion, a port supporting signal amplification or a port supporting signal filtering, and outputs the test signals to the meter, wherein the port supporting frequency conversion, the port supporting signal amplification or the port supporting signal filtering are the same port or different ports.