CN212086207U

CN212086207U - Same-frequency different-frequency multi-carrier multi-port intermodulation test system

Info

Publication number: CN212086207U
Application number: CN202020955702.6U
Authority: CN
Inventors: 李荣明; 唐静; 朱斌; 吴雪; 熊燕
Original assignee: Nanjing Hualuo Communication Technology Co ltd
Current assignee: Nanjing Hualuo Communication Technology Co ltd
Priority date: 2020-05-31
Filing date: 2020-05-31
Publication date: 2020-12-04
Anticipated expiration: 2030-05-31

Abstract

The utility model discloses a same frequency pilot frequency multicarrier multiport intermodulation test system, including signal generation unit, power amplifier unit, passive module unit, switch matrix, close way module unit, dynamometer, spectrometer, switch and PC, signal generation unit and power amplifier unit connection, power amplifier unit and switch matrix connection, dynamometer and passive module unit connection, switch matrix and close way module unit connection, the spectrometer and switch matrix connection, the PC passes through the switch and all is connected with signal generation unit, power amplifier unit, passive module unit, switch matrix, close way module unit, spectrometer. The utility model is suitable for a multiple standard intermodulation interference test, and can carry out a measuring with frequency pilot frequency multi-carrier multiport intermodulation test system in multiple frequency range, the utility model discloses can carry out with frequency or pilot frequency multiport antenna test, can also test three carrier combination intermodulation.

Description

Same-frequency different-frequency multi-carrier multi-port intermodulation test system

Technical Field

The utility model relates to the field of communication technology, more specifically say, in particular to same frequency pilot frequency multi-carrier multiport intermodulation test system.

Background

With the continuous expansion of mobile communication network systems and the rapid increase of transmission data in China, the passive intermodulation test requirements of mobile communication products are more and more, and particularly, the requirements of the intermodulation tester for simultaneously testing multiple systems in the market are urgent for the information source sharing antenna feed system with different frequency band systems of each operator.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a with frequency pilot frequency multi-carrier multiport intermodulation test system is applicable to multi-standard, multichannel intermodulation interference test to satisfy the information source sharing antenna feeder system intermodulation test demand of the different frequency channel standard of operator.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a same frequency pilot frequency multicarrier multiport intermodulation test system, includes signal generation unit, power amplifier unit, passive module unit, switch matrix, closes way module unit, power meter, spectrometer, switch and PC, signal generation unit is connected with the power amplifier unit, the power amplifier unit is connected with switch matrix, the power meter is connected with passive module unit, switch matrix with close way module unit connection, the spectrometer is connected with switch matrix, the PC passes through the switch and all connects with signal generation unit, power amplifier unit, passive module unit, switch matrix, closes way module unit, spectrometer.

Further, the signal generation unit includes that eight models are KEYSIGHT N5172B's instrument signal source, the power amplifier unit includes that eight models are NTPIM-0727300's power amplifier, the passive module unit includes that four models are NTPIM-0727 AM's passive module, and wherein the input port that corresponds power amplifier is connected to the output port of every instrument signal source, and the input port of a passive module is connected to two power amplifier's output port, and a power load is concatenated to an output port of passive module, and another output port of passive module concatenates directional coupler's input port, the power meter is four.

Further, the switch matrix comprises a one-to-six switch J1-J3, a switch J4, a first one-to-eight switch J5-J8 and a second one-to-eight switch J9-J12, output ports of the directional coupler are connected in series with common ports of the one-to-six switch J1-J3, first ports of the one-to-six switch J1-J3 are connected with the first one-to-eight switch J5-J8, the second one-to-eight switch J9-J12 is connected with RX channels of eight duplexers of the passive module units, four power meters are connected with TX channels of the eight duplexers of the passive module units, ANT interfaces of the eight duplexers of the passive module units are connected with the tested piece, and the tested piece is connected with the spectrometer through the first to fourth ports of the switch J4.

Further, the combining module unit includes first to fifth combining modules, the models of which are NTPIM-1x3, a TX1 port of the first combining module is connected to a second port of J1 in the switch matrix, a TX2 port of the first combining module is connected to a second port of J2 in the switch matrix, an RX port of the first combining module is connected to a fifth port of J4 in the switch matrix, a TX1 port of the second combining module is connected to a third port of J1 in the switch matrix, a TX2 port of the second combining module is connected to a third port of J2 in the switch matrix, a TX3 port of the first combining module is connected to a third port of J3 in the switch matrix, and an RX port of the second combining module is connected to a sixth port of J4 in the switch matrix; a TX1 port of the third combining module is connected with a fourth port of J1 in the switch matrix, a TX2 port of the third combining module is connected with a fourth port of J2 in the switch matrix, a TX3 port of the third combining module is connected with a fourth port of J3 in the switch matrix, and an RX port of the third combining module is connected with a seventh port of J4 in the switch matrix; a TX1 port of the fourth combining module is connected to a fifth port of J1 in the switch matrix, a TX2 port of the fourth combining module is connected to a fifth port of J2 in the switch matrix, a TX3 port of the fourth combining module is connected to a fifth port of J3 in the switch matrix, and an RX port of the fourth combining module is connected to an eighth port of J4 in the switch matrix; a TX1 port of the fifth combining module is connected to a sixth port of J1 in the switch matrix, a TX2 port of the fifth combining module is connected to a sixth port of J2 in the switch matrix, a TX3 port of the fifth combining module is connected to a sixth port of J3 in the switch matrix, and an RX port of the fifth combining module is connected to a ninth port of J4 in the switch matrix.

Further, the model of the power meter is Agilent U2001A.

Further, the model of the spectrometer is KEYSIGHT N9010B.

Compared with the prior art, the utility model has the advantages of: the utility model is suitable for a multiple standard intermodulation interference test, and can carry out a measuring with frequency pilot frequency multicarrier multiport intermodulation test system in multiple frequency range, the utility model discloses can carry out with frequency or pilot frequency multiport antenna test, can also test three carrier combination intermodulation, be suitable for the scene and include that the multichannel is with frequency pilot frequency test and multichannel.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of the same-frequency different-frequency multi-carrier multi-port intermodulation test system of the present invention.

Fig. 2 is a schematic diagram of a middle passive module unit according to the present invention.

Fig. 3 is a schematic diagram of the middle combining module unit of the present invention.

Fig. 4 is a schematic diagram of J5-J12 in the switch matrix of the present invention.

Fig. 5 is a schematic diagram of J1-J4 in the switch matrix of the present invention.

Fig. 6 is the utility model discloses a multichannel is with different mouthful test scene block diagram of frequency.

Fig. 7 is a block diagram of the multi-channel pilot frequency same-port test scenario of the present invention.

Fig. 8 is a block diagram of a multi-channel pilot frequency interface test scenario of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.

Referring to fig. 1-5, the utility model provides a with same frequency pilot frequency multicarrier multiport intermodulation test system, including signal generation unit 100, power amplifier unit 200, passive module unit 300, switch matrix 400, close way module unit 500, the dynamometer, frequency spectrograph 700, switch 800 and PC 900, signal generation unit 100 is connected with power amplifier unit 200, power amplifier unit 200 is connected with switch matrix 400, the dynamometer is connected with passive module unit 300, switch matrix 400 with close way module unit 500 and be connected, frequency spectrograph 700 is connected with switch matrix 400, PC 900 passes through switch 800 and signal generation unit 100, power amplifier unit 200, passive module unit 300, switch matrix 400, close way module unit 500, frequency spectrograph 700 is all connected.

In this embodiment, the signal generating unit 100 includes eight meter signal sources with model numbers KEYSIGHT N5172B, which are respectively the

meter signal sources

101 and 108, the power amplifier unit 200 includes eight power amplifiers with model numbers NTPIM-0727300, which are respectively the

power amplifiers

201 and 208, and the passive module unit 300 includes four passive modules with model numbers NTPIM-0727AM, which are respectively the

passive modules

301 and 304.

In this embodiment, the model of the power meter is Agilent U2001A, and the model of the spectrometer 700 is KEYSIGHT N9010B.

The output port of each instrument signal source is connected with the input port of the corresponding power amplifier, the output ports of the two power amplifiers are connected with the input port of one passive module, and the method specifically comprises the following steps: the output ends of the

meter signal sources

101 and 102 are connected to the input ports of the

power amplifiers

201 and 202 in the power amplifier unit 200, and the output ports of the

power amplifiers

201 and 202 are connected to the TX1 and TX2 ports of the passive module 301 in the passive module unit 300; the output ends of the

meter signal sources

103 and 104 are connected with the input ports of the

power amplifiers

203 and 204 in the power amplifier unit 200, and the output ports of the

power amplifiers

201 and 202 are connected with the TX1 and TX2 ports of the passive module 302 in the passive module unit 300; the output ends of the

meter signal sources

105 and 106 are connected with the input ports of the

power amplifiers

205 and 206 in the power amplifier unit 200, and the output ports of the

power amplifiers

201 and 202 are connected with the TX1 and TX2 ports of the passive module 303 in the passive module unit 300; the output ends of the

meter signal sources

107 and 108 are connected to the input ports of the

power amplifiers

207 and 208 in the power amplifier unit 200, and the output ports of the

power amplifiers

201 and 202 are connected to the TX1 and TX2 ports of the passive module 304 in the passive module unit 300.

RX ports of the

passive modules

301, 302, 303, and 304 are connected to the switch matrix 400, and are switched to a spectrum analyzer through a switch to receive intermodulation signals for intermodulation analysis, PDET ports of the

passive modules

301, 302, 303, and 304 are sequentially connected to the switch matrix 400, and are switched to the power meter unit power meter 601, the power meter 602, the power meter 603, and the power meter 604, and the four power meters respectively perform sampling analysis on the coupled signals after the

passive modules

301, 302, 303, and 304 are combined.

The passive module has the principle that the output ends of two paths of instrument signal sources are respectively connected with the signal input ports of the I path and the II path of the NTPIM-0727300 power amplifier, and the output ends of the I path and the II path of the NTPIM-0727300 power amplifier are respectively connected with the TX1/TX2 input ports of the NTPIM-0727AM passive module; the power signal is a path of power signal synthesized by the power of the carrier 1/the carrier 2 through the 3dB electric bridge, the synthesized power signal is transmitted to the radio frequency switch through the directional coupler, and the power signal respectively enters the TX port of the low intermodulation duplexer through the switching of the radio frequency switch; meanwhile, the coupling port carries out power detection on the coupled power signal, and the power is detected in real time through an upper computer; and residual intermodulation generated by the low intermodulation duplexer is transmitted to a frequency spectrograph through an RX port for intermodulation analysis, is displayed in a spectral line mode, and is synchronously acquired and monitored in real time through a PC (personal computer).

The switch matrix 400 comprises a one-to-six switch J1-J3, a switch J4, a first one-to-eight switch J5-J8, a second one-to-eight switch J9-J12, a bridge combined output port of the passive module unit 300 (comprising 301, 302, 303 and 304), a power load is connected with one port in series, a directional coupler input port is connected with the other port in series, an output port of the directional coupler is connected with a common port of the one-to-six switch J1-J3 of the switch matrix 400 in series, a first port of the one-to-six switch J1-J3 is connected with a first one-to-eight switch J5-J8, power signals are respectively transmitted to TX channels of eight duplexers of the passive module, an ANT interface of the duplexer is connected with a tested element, a second one-to-eight switch J9-J12 is used for respectively transmitting the power signals to eight RX channels of the passive module, intermodulation signals generated by the tested element pass through 1 of the switch J4, 2. The 3, 4 ports are transmitted to the spectrometer 700 for intermodulation sampling.

The combining module unit 500 includes first to fifth combining

modules

501 and 505, the models of the first to fifth combining

modules

501 and 505 are NTPIM-1x3, a TX1 port of the first combining module 501 is connected to a second port of J1 in the switch matrix 400, a TX2 port of the first combining module 501 is connected to a second port of J2 in the switch matrix 400, an RX port of the first combining module 501 is connected to a fifth port of J4 in the switch matrix 400, a TX1 port of the second combining module 502 is connected to a third port of J1 in the switch matrix 400, a TX2 port of the second combining module 502 is connected to a third port of J2 in the switch matrix 400, a TX3 port of the first combining module 501 is connected to a third port of J3 in the switch matrix 400, and an RX port of the second combining module 502 is connected to a sixth port of J4 in the switch matrix 400; a TX1 port of the third combining module 503 is connected to the fourth port of J1 in the switch matrix 400, a TX2 port of the third combining module 503 is connected to the fourth port of J2 in the switch matrix 400, a TX3 port of the third combining module 503 is connected to the fourth port of J3 in the switch matrix 400, and an RX port of the third combining module 503 is connected to the seventh port of J4 in the switch matrix 400; a TX1 port of the fourth combining module 504 is connected to a fifth port of J1 in the switch matrix 400, a TX2 port of the fourth combining module 504 is connected to a fifth port of J2 in the switch matrix 400, a TX3 port of the fourth combining module 504 is connected to a fifth port of J3 in the switch matrix 400, and an RX port of the fourth combining module 504 is connected to an eighth port of J4 in the switch matrix 400; the TX1 port of the fifth combining module 505 is connected to the sixth port of J1 in the switch matrix 400, the TX2 port of the fifth combining module 505 is connected to the sixth port of J2 in the switch matrix 400, the TX3 port of the fifth combining module 505 is connected to the sixth port of J3 in the switch matrix 400, and the RX port of the fifth combining module 505 is connected to the ninth port of J4 in the switch matrix 400.

The principle of the first combining module 501 is as follows: the output ends of the two paths of instrument signal sources are respectively connected with the signal input ports of the I path and the II path of the NTPIM-0727300 power amplifier, and the output ends of the I path and the II path of the 700 and 2700MHZ power amplifier are respectively connected with the TX1/TX2 input port of the 1NTPIM-0727AM passive module; the power signal is a power signal obtained by combining the power of the carrier 1/carrier 2 into one path through a 3dB bridge, the combined power signal is transmitted to a radio frequency switch through a directional coupler and enters TX1 of the first combining module 501, TX2 and TX3 of the first combining module 501 are accessed by radio frequency switches inside the passive module 302 and the passive module 303, TX1(700) and TX2(DD800) enter triplexers TX1 and TX2 for combining, ANT of the triplexers enters TX1(703 and 862) of the combiner, TX3(900) of the first combining module 501 enters duplexer TX, and then the ANT of 900 duplexer outputs the TX2(880 and 960) of the combiner, and at the same time, TX1, TX2 and 3 of the combining module 1 enter the combiner, and ANT of the combiner: 703 and 960 to the tested piece. Applicable scenarios are as follows: scene 1: 700RX 2 x 700TX-800 TX; scene 2: 800 RX-800 TX2 x 800 TX; scene 3: 700 RX-2 × 800TX-900 TX.

The principle of the second combining module 502 is as follows: the output ends of the two paths of instrument signal sources are respectively connected with the signal input ports of the I path and the II path of the NTPIM-0727300 power amplifier, and the output ends of the I path and the II path of the 700-2700MHZ power amplifier are respectively connected with the TX1/TX2 input port of the passive module NTPIM-0727 AM; the power signals are power-combined into a power signal by a 3dB bridge with carrier 1/carrier 2, the combined power signal is transmitted to a port 3 of the rf switch through the directional coupler and enters TX1(700) of the second combining module 502, TX2 and TX3 of the first combining module 501 are connected to TX2(850) and TX3(900) of the two

passive modules

302 and 303 respectively enter the

duplexers TX

700, 850 and 900, the signals are output by the

duplexers ANT

700, 850 and 900 and enter TX1(703 and 803), TX2(824 and 885) and TX3(905 and 960) of the different-frequency combiner for combining, and the ANT (703 and 960) is output to the tested device. Applicable scenarios are as follows: scene 4: 700TX-850TX +900TX 850 RX; scene 5: 700 RX-700 TX +850TX-900 TX; scene 6: 900 RX-850 TX +700 TX-700 TX.

The principle of the third combining module 503 is as follows: the output ends of the two paths of instrument signal sources are respectively connected with the signal input ports of the I path and the II path of the NTPIM-0727300 power amplifier, and the output ends of the I path and the II path of the 700-2700MHZ power amplifier are respectively connected with the TX1/TX2 input port of the NTPIM-0727AM passive module; the power signal is a power signal synthesized by a 3dB bridge with carrier 1/carrier 2 power into one path, the synthesized power signal is transmitted to a 1-branch 6 switch through a directional coupler, a 4 port of the 1-branch 6 switch enters a TX1(700) of a combining module 3, a TX2 and a TX3 of a first combining module 501 are connected to a TX2(DD800) and a TX3(2600) through 4 ports of 1-branch 6 switches in other two NTPIM-0727AM (2 and 3) passive modules and respectively enter 700, DD800 and 2600 duplexers TX, the signal is output by 700, DD800 and 2600 duplexers ANT and enters a TX1 (862), a TX2(880-915) and a TX3(2620-2690) of an inter-frequency combiner for combining, and the ANT (703-2690) is output to a tested element. Applicable scenarios are as follows: scene 7: 700RX ═ 700TX- (2600TX-2600 TX); scene 8: 800RX ═ 800TX + (2600TX-2600 TX); scene 9: 900RX ═ 900TX- (2600TX-2600 TX).

The principle of the fourth combining module 504 is as follows: the output ends of the two paths of instrument signal sources are respectively connected with signal input ports of a path I and a path II of 700-2700MHZ and 300W power amplifiers, and the output ends of the path I and the path II of the 700-2700MHZ power amplifiers are respectively connected with a TX1/TX2 input port of an NTPIM-0727AM passive module; the power signals are combined into one path of power signal by a 3dB bridge, then the combined power signal is transmitted to a 1-branch 6 switch through a directional coupler, a 5 port of the 1-branch 6 switch enters TX1(1400) of a fourth combining module 504, TX2 and TX3 of the fourth combining module 504 are accessed into TX2(1800) and TX3(2100) through 5 ports of a 1-branch 6 switch inside two other NTPIM-0727AM (2 and 3) passive modules, the TX1 and TX3 are directly accessed into an inter-frequency combiner, TX2 is accessed into an 1800 duplexer, ANT of the 1800 duplexer is accessed into TX2 of the inter-frequency combiner, TX1(1440-1515), TX2(1710-1880) and TX3(1920-2170) of the inter-frequency combiner are combined, and the ANT (1440-2170) of the inter-frequency combiner is accessed to a tested element. Applicable application scenarios are as follows: scene 10: 1800RX 1400TX +2100TX +1800 TX.

The principle of the fifth combining module 505 is as follows: the output ends of the two paths of instrument signal sources are respectively connected with signal input ports of a path I and a path II of 700-2700MHZ and 300W power amplifiers, and the output ends of the path I and the path II of the 700-2700MHZ power amplifiers are respectively connected with a TX1/TX2 input port of an NTPIM-0727AM passive module; the power signals are power-combined into a power signal by a 3dB bridge, the power signal is transmitted to a 1-branch 6 switch through a directional coupler, a 6 port of the 1-branch 6 switch enters TX1(1800) of a fifth combining module 505, TX2 and TX3 of the fifth combining module 505 are connected to TX2(2100) and TX3(2600) through 6 ports of 1-branch 6 switches in other two NTPIM-0727AM (2 and 3) passive modules and enter into 1800, 2100 and 2600 duplexers TX respectively, signals are output by 1800, 2100 and 2600 duplexers ANT and enter TX1(1710 and 1880), TX2(1920 and 2170) and TX3(2620 and 2690) of an inter-frequency combiner to be combined, and ANT (1710 and 2690) is output to a tested element. Applicable scenarios are as follows: scene 11: 2600RX — 2 × 2100TX-1800 TX; scene 12: 1800RX 2 x 2100TX-2600 TX; scene 13: 1800RX ═ 1800TX- (2600TX-2600 TX).

The utility model provides a high-power radio frequency signal of power unit output, high stable state, low spurious, the combination module is low intermodulation, high-power, and has included multiple frequency channel, and the carrier signal of three different frequency channels can produce the intermodulation signal of a frequency channel in the combination module. Specifically, the ports of the combining modules TX1, TX2, and TX3 are signals of the same or different frequency bands, the three signals are combined by a triplexer or a duplexer in the combining module to generate intermodulation signals in other frequency bands, and the port outputs of the combining modules are high-power radio-frequency signals, and the power range can be 20dBm-46 dBm. The method is used for testing intermodulation values generated by three signals with the same or different frequency bands, and in specific implementation, the signal frequency bands can be automatically designated or the same or different systems can be selected according to the application scene requirements.

The utility model discloses support 4 channel tests, 8 test frequency channels are supported to every passageway, 700MHZ, 800MHZ, 850MHZ, 900MHZ, 1400MHZ, 1800MHZ, 2100MHZ, 2600MHZ respectively, the system covers frequency 700MHZ-2700MHZ, every passageway intermodulation is less than or equal to-168 dBc @2 x 43dBm, every passageway actual output range 20-46dBm is adjustable, support 3.5.7.9 rank intermodulation test, three carrier wave combination intermodulation test has the template to call the function.

The utility model supports multi-standard signal testing; the design of a standardized module is adopted, and the expansion and the maintenance are easy; the utility model discloses an equipment reusability is high, and the measuring accuracy is high.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, and the protection scope of the present invention should not be exceeded by the claims.

Claims

1. A same-frequency different-frequency multi-carrier multi-port intermodulation test system is characterized in that: including signal generation unit, power amplifier unit, passive modular unit, switch matrix, way modular unit, power meter, frequency spectrograph, switch and PC, signal generation unit and power amplifier unit connection, power amplifier unit and switch matrix connection, power meter and passive modular unit connection, the switch matrix with close way modular unit connection, the frequency spectrograph is connected with the switch matrix, the PC passes through the switch and all is connected with signal generation unit, power amplifier unit, passive modular unit, switch matrix, way modular unit, frequency spectrograph.

2. The same-frequency different-frequency multi-carrier multi-port intermodulation test system of claim 1, characterized in that: the signal generation unit includes that eight models are KEYSIGHT N5172B's instrument signal source, the power amplifier unit includes that eight models are NTPIM-0727300's power amplifier, passive module unit includes that four models are NTPIM-0727 AM's passive module, and wherein the input port that corresponds power amplifier is connected to the output port of every instrument signal source, and the input port of a passive module is connected to two power amplifier's output port, and power load is concatenated to an output port of passive module, and another output port of passive module concatenates directional coupler's input port, the power meter is four.

3. The same-frequency different-frequency multi-carrier multi-port intermodulation test system of claim 2, characterized in that: the switch matrix comprises a one-to-six switch J1-J3, a switch J4, a first one-to-eight switch J5-J8 and a second one-to-eight switch J9-J12, output ports of the directional couplers are connected with common ports of the one-to-six switch J1-J3 in series, first ports of the one-to-six switches J1-J3 are connected with the first one-to-eight switch J5-J8, the second one-to-eight switches J9-J12 are connected with RX channels of eight duplexers of the passive module units, four power meters are connected with TX channels of the eight duplexers of the passive module units, ANT interfaces of the eight duplexers of the passive module units are connected with a tested piece, and the tested piece is connected with a frequency spectrograph through the first port to the fourth port of the switch J4.

4. The same-frequency different-frequency multi-carrier multi-port intermodulation test system of claim 3, characterized in that: the combining module unit comprises first to fifth combining modules, the models of the first to fifth combining modules are NTPIM-1x3, a TX1 port of the first combining module is connected with a second port of J1 in the switch matrix, a TX2 port of the first combining module is connected with a second port of J2 in the switch matrix, an RX port of the first combining module is connected with a fifth port of J4 in the switch matrix, a TX1 port of the second combining module is connected with a third port of J1 in the switch matrix, a TX2 port of the second combining module is connected with a third port of J2 in the switch matrix, a TX3 port of the first combining module is connected with a third port of J3 in the switch matrix, and an RX port of the second combining module is connected with a sixth port of J4 in the switch matrix; a TX1 port of the third combining module is connected with a fourth port of J1 in the switch matrix, a TX2 port of the third combining module is connected with a fourth port of J2 in the switch matrix, a TX3 port of the third combining module is connected with a fourth port of J3 in the switch matrix, and an RX port of the third combining module is connected with a seventh port of J4 in the switch matrix; a TX1 port of the fourth combining module is connected to a fifth port of J1 in the switch matrix, a TX2 port of the fourth combining module is connected to a fifth port of J2 in the switch matrix, a TX3 port of the fourth combining module is connected to a fifth port of J3 in the switch matrix, and an RX port of the fourth combining module is connected to an eighth port of J4 in the switch matrix; a TX1 port of the fifth combining module is connected to a sixth port of J1 in the switch matrix, a TX2 port of the fifth combining module is connected to a sixth port of J2 in the switch matrix, a TX3 port of the fifth combining module is connected to a sixth port of J3 in the switch matrix, and an RX port of the fifth combining module is connected to a ninth port of J4 in the switch matrix.

5. The same-frequency different-frequency multi-carrier multi-port intermodulation test system of claim 4, characterized in that: the model of the power meter is Agilent U2001A.

6. The same-frequency different-frequency multi-carrier multi-port intermodulation test system of claim 5, characterized in that: the model of the spectrometer is KEYSIGHT N9010B.