Multi-port Dual-frequency Intermodulation Test System

Abstract

The present invention provides a multi-port dual-frequency intermodulation test system, belonging to the field of communication technologies. The system of the present invention includes: a first device, a second device, a transmitting intermodulation module, and a transmission intermodulation unit; wherein, the first device and the second device are used to provide carrier signals and synthesize them into radio frequency signals; the transmitting intermodulation unit is used to divide the radio frequency signals into multiple paths of radio frequency signals and transmit them to multiple ports respectively, and the ports support transceiver channels of two frequency bands to perform intermodulation tests on the device under test; the transmission intermodulation unit is used to perform transmission intermodulation tests on the intermodulation signals generated by the device under test. In the present invention, the transmitting intermodulation unit and the transmission intermodulation unit in the system are designed to have multiple ports, and each port supports transceiver channels of two frequency bands to meet the requirement of simultaneous multi-port power-on tests, and can achieve combined intermodulation of single-tone and dual-tone power-on at 1800 and 2100 MHz. It is an integrated intermodulation test system with good reusability.

Description

Technical Field

[0001] The present invention belongs to the field of communication technologies, and particularly relates to a multi-port dual-frequency intermodulation test system. Background Art

[0002] With the development of wireless communication technologies, passive intermodulation testers are applied to the communication industry. Ordinary single-port single-band intermodulation test systems are only applicable to the intermodulation test of single-port passive devices, and such test systems can no longer meet the intermodulation test requirements of multi-band multi-port.

[0003] Based on this, the present invention proposes a multi-port dual-frequency intermodulation test system to be able to meet the simultaneous power transmission test of multiple ports. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art, and provides a multi-port dual-frequency intermodulation test system.

[0005] The present invention provides a multi-port dual-frequency intermodulation test system, including: a first device, a second device, and a transmit intermodulation module and a transmission intermodulation unit both connected to the first device and the second device; wherein,

[0006] The first device and the second device are used to provide carrier signals and synthesize them into radio frequency signals;

[0007] The transmit intermodulation unit is used to divide the radio frequency signal into multiple paths of radio frequency signals and transmit them to multiple ports respectively, and the ports support transceiver channels of two frequency bands to perform intermodulation tests on the device under test;

[0008] The transmission intermodulation unit is used to perform transmission intermodulation tests on the intermodulation signals generated by the device under test.

[0009] Optionally, both the first device and the second device include a transceiver control module, at least one power amplifier module, and a COM module; wherein,

[0010] The output port of the transceiver control module is connected to the input port of the power amplifier module, the output port of the power amplifier module is connected to the transmit port of the COM module, and the transmit port of the transmit intermodulation unit is connected to the power output port of the COM module;

[0011] The transceiver control module is used to provide a carrier signal and receive the echo signal of the carrier signal;

[0012] The power amplifier module is used to transmit the carrier signal to the COM module;

[0013] The COM module is used to synthesize the carrier signal into a radio frequency signal and transmit it to the transmit intermodulation unit.

[0014] Optionally, the number of the power amplifier modules is two. The input port and the output port of one of the power amplifier modules are respectively connected to the first output port of the transceiver control module and the first transmission port of the COM module.

[0015] The input port and the output port of the other power amplifier module are respectively connected to the second output port of the transceiver control module and the second transmission port of the COM module.

[0016] Optionally, the COM module includes a bridge, a first combiner, a high-power switch, and a power splitter. Among them,

[0017] The bridge is used to transmit the carrier signal to the common port of the high-power switch.

[0018] The first combiner is used to combine the carrier signals into one radio frequency signal through combination and transmit it to the power output port.

[0019] The power splitter is used to divide the combined radio frequency signal into two channels.

[0020] Optionally, the transmit intermodulation unit includes a first transmit module and a second transmit module connected to the power output port of the COM module. The first transmit module is also connected to the transceiver control module in the first device, and the second transmit module is also connected to the transceiver control module in the second device.

[0021] The first transmit module is used to divide the radio frequency signal into multiple radio frequency signals, transmit the multiple radio frequency signals to multiple ports for multi-port intermodulation testing of the device under test; and is also used to transmit the intermodulation signals generated by the device under test to the transceiver control module in the first device respectively.

[0022] The second transmit module is used to divide the radio frequency signal into multiple radio frequency signals, transmit the multiple radio frequency signals to multiple ports for multi-port intermodulation testing of the device under test; and is also used to transmit the intermodulation signals generated by the device under test to the transceiver control module in the second device respectively.

[0023] Optionally, both the first transmit module and the second transmit module include a second combiner, a switch component, and multiple first multiplexers. The input port of the second combiner is connected through the transmit port, and the output port of the second combiner is connected to the first multiplexer through the switch component.

[0024] The second combiner is configured to divide the radio frequency signal into multiple radio frequency signals;

[0025] The switch assembly is configured to switch each radio frequency signal to the corresponding signal output port of the first multiplexer.

[0026] Optionally, the first transmitting module and the second transmitting module each further include a switch connected to the receiving port and multiple second multiplexers connected to the switch;

[0027] The switch is configured to transmit the intermodulation signal returned to the multiple second multiplexers to the transceiver control module through switch combining.

[0028] Optionally, the first combiner is a 1-to-2 combiner; and / or,

[0029] The second combiner is a 1-to-8 combiner; and / or,

[0030] The switch is a 1-to-8 switch.

[0031] Optionally, the transmission intermodulation unit includes a first receiving module and a second receiving module. The first receiving module is connected to the transceiver control module and the first transmitting module in the first device, and the second receiving module is connected to the transceiver control module and the second transmitting module in the second device;

[0032] The first receiving module is configured to receive the intermodulation signal of the first transmitting module and transmit the intermodulation signal to the transceiver control module in the first device;

[0033] The second receiving module is configured to receive the intermodulation signal of the second transmitting module and transmit the intermodulation signal to the transceiver control module in the second device.

[0034] Optionally, the first transmitting module, the second transmitting module, the first receiving module, and the second receiving module each have 8 test ports, and each test port has transceiver channels for 2 frequency bands simultaneously.

[0035] The present invention provides a multi-port dual-band intermodulation test system, including: a first device, a second device, a transmitting intermodulation module and a transmission intermodulation unit both connected to the first device and the second device; wherein, the first device and the second device are used to provide carrier signals and synthesize them into radio frequency signals; the transmitting intermodulation unit is used to divide the radio frequency signal into multiple radio frequency signals and transmit them to multiple ports respectively, and the ports support transceiver channels of two frequency bands to perform intermodulation tests on the device under test; the transmission intermodulation unit is used to perform transmission intermodulation tests on the intermodulation signals generated by the device under test. In the present invention, the transmitting intermodulation unit and the transmission intermodulation unit in the system are designed to have multiple ports, and each port supports transceiver channels of two frequency bands to meet the requirements of simultaneous multi-port power-on tests, and can realize the combined intermodulation of single-tone and dual-tone power-on at 1800 and 2100M. It is an integrated intermodulation test system with good reusability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic block diagram of a multi-port dual-band intermodulation test system according to an embodiment of the present invention;

[0037] Figure 2 is a schematic block diagram of a first COM module and a second COM module system according to another embodiment of the present invention;

[0038] Figure 3 is a schematic block diagram of a first transmitting module according to another embodiment of the present invention;

[0039] Figure 4 is a schematic block diagram of a second transmitting module according to another embodiment of the present invention;

[0040] Figure 5 is a schematic block diagram of a first receiving module according to another embodiment of the present invention;

[0041] Figure 6 is a schematic block diagram of a second receiving module according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] Unless otherwise specifically stated, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The terms "including" or "comprising" used in the present invention neither limit the mentioned shapes, numbers, steps, actions, operations, components, elements and / or their groups, nor exclude the presence or addition of one or more other different shapes, numbers, steps, actions, operations, components, elements and / or their groups. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity and order of the indicated technical features.

[0044] As Figures 1 to 6 shown, the present invention provides a multi-port dual-frequency intermodulation test system, including: a first device 110, a second device 120, and a transmit intermodulation module and a transmission intermodulation unit both connected to the first device 110 and the second device 120; wherein, the first device 110 is configured to provide a first carrier signal and synthesize it into a first radio frequency signal; the second device 120 is configured to provide a second carrier signal and synthesize it into a second radio frequency signal, and the transmit intermodulation unit is configured to divide the first radio frequency signal and the second radio frequency signal into multiple paths of first radio frequency signals and multiple paths of second radio frequency signals respectively, and sequentially transmit them to multiple ports, each port supporting transceiver channels of two frequency bands, so as to perform intermodulation tests on the device under test, and correspondingly generate a first intermodulation signal and a second intermodulation signal. The transmission intermodulation unit is configured to perform transmission intermodulation tests on the first intermodulation signal and the second intermodulation signal generated by the device under test.

[0045] In this embodiment, the transmit intermodulation unit and the transmission intermodulation unit in the system are designed to have multiple ports, and each port supports transceiver channels of two frequency bands, so as to meet the requirements of simultaneous power-on tests for multiple ports, have interchangeability and universality, support dual-frequency combinations, and have a reflection transmission intermodulation test function. It is an integrated intermodulation test system with good reusability.

[0046] Specifically, as Figure 1 shown, the first device 110 includes a first transceiver control module (such as Figure 1 the first TX / RX control module 111 in Figure 1 ), a first power amplifier module (such as Figure 1PA113) in it, and the first COM module 114. Among them, the connection relationships between the modules are specifically as follows: The first transceiver control module (the first TX / RX control module 111) has two output ports. Its first output port is connected to the input port of the first power amplifier module (PA112), and its second output port is connected to the input port of the second power amplifier module (PA 113). And, the first COM module 114 has a power output port Σ, a first transmission port TX1, and a second transmission port TX2. The power output port Σ of this first COM module 114 is connected to the transmission port of the transmit intermodulation unit. The first transmission port TX1 of this first COM module 114 is connected to the output port of the first power amplifier module (PA 112), and the second transmission port TX2 of this first COM module 114 is connected to the output port of the second power amplifier module (PA 113).

[0047] Further, the first transceiver control module in this embodiment is used to provide a first carrier signal and receive the echo signal of the first carrier signal; the first power amplifier module and the second power amplifier module are used to transmit the first carrier signal to the first COM module; and, the first COM module is used to synthesize the first carrier signal into a first radio frequency signal and transmit it to the transmit intermodulation unit.

[0048] It is not difficult to understand that the second device has the same structure as the first device. Specifically, as Figure 1 shown, this second device 120 includes a second transceiver control module (such as the second TX / RX control module 121 in Figure 1 ), a third power amplifier module (such as PA 122 in Figure 1 ), a fourth power amplifier module (such as PA 123 in Figure 1 ), and a second COM module 124. Among them, the connection relationships between the modules are specifically as follows: The second transceiver control module (the second TX / RX control module 121) has two output ports. Its first output port is connected to the input port of the third power amplifier module (PA 122), and its second output port is connected to the input port of the fourth power amplifier module (PA 123). And, the second COM module 124 has a power output port Σ, a first transmission port TX1, and a second transmission port TX2. The power output port Σ of this second COM module 124 is connected to the transmission port of the transmit intermodulation unit. The first transmission port TX1 of this second COM module 124 is connected to the output port of the third power amplifier module (PA 122), and the second transmission port TX2 of this second COM module 124 is connected to the output port of the fourth power amplifier module (PA 123).

[0049] Further, the second transceiver control module is used to provide a second carrier signal and receive the echo signal of the second carrier signal; the third power amplifier module and the fourth power amplifier module are used to transmit the second carrier signal to the second COM module; and, the second COM module is used to synthesize the second carrier signal into a second radio frequency signal and transmit it to the transmit intermodulation unit.

[0050] It should be noted that the first power amplifier module, the second power amplifier module, the third power amplifier module, and the fourth power amplifier module in this embodiment are all 1000W power amplifiers, belonging to continuous wave single-channel power amplifiers.

[0051] Furthermore, as Figure 2 shown, both the above-mentioned first COM module and the second COM module include a bridge, a first combiner, a transmit filter, a high-power switch, and a power divider. Among them, the bridge uses a 3dB bridge, and the first combiner uses a 1-to-2 combiner.

[0052] Among them, as Figure 2 shown, in the first device, the bridge is used to transmit the first carrier signal to the common port of the high-power switch, and the other port is externally connected to a high-power load. The first port of the high-power switch is connected to the power output port Σ of the first COM module, and the second port of the high-power switch is combined and transmitted to the first power output port Σ1 and the second power output port Σ2 through a 1-to-2 combiner. The power output port Σ and the first power output port Σ1 (the second power output port Σ2) have a 3Db difference in ports. The first combiner is used to combine the above-mentioned first carrier signal into a single first radio frequency signal through combination and transmit it to the power output port of the first COM module to meet the 8-port 2x44dBm test, and then divide the combined first radio frequency signal into two channels based on its built-in power divider to meet the 16-port 2x41dBm power test.

[0053] Similarly, in the second device, the principle of the second COM module is the same as that of the first COM module. The bridge is used to transmit the second carrier signal to the common port of the high-power switch; the first combiner is used to combine the above-mentioned second carrier signal into a single second radio frequency signal through combination and transmit it to the power output port of the second COM module to meet the 8-port 2x44dBm test, and then divide the combined second radio frequency signal into two channels based on its built-in power divider to meet the 16-port 2x41dBm power test.

[0054] The main functions of the first COM module, the second COM module, the first power amplifier module, the second power amplifier module, the third power amplifier module, and the fourth power amplifier module in this embodiment are to provide a transmission control signal for the carrier and a switching control circuit for 16-port transmission and 16-port reception. In addition, the first COM module and the second COM module in this embodiment support a wide frequency band range, cover the multi-port test frequency band range, can implement a dual-frequency design for the ports, and one channel port has a transceiver channel for two frequency bands at the same time.

[0055] Furthermore, as Figure 1 shown, the transmit intermodulation unit includes a first transmit module 131 and a second transmit module 132; wherein, both the first transmit module 131 and the second transmit module 132 have two transmit ports, specifically a first transmit port TX1 and a second transmit port TX2. In addition, the first COM module 114 and the second COM module 124 both have two power output ports Σ for 8-port 2x44 dBm testing, and can be connected to the first transmit port or the second transmit port of the first transmit module 131. The two power output ports are specifically a first power output port Σ1 and a second power output port Σ2, and the two power output ports transmit the same frequency band for 16-port 2x41 dBm testing. Among them, the first transmit port TX1 of the first transmit module 131 is connected to the first power output port Σ1 of the first COM module 114, and the second transmit port TX2 of the first transmit module 131 is connected to the first transmit port TX1 of the second COM module 124. In addition, the first transmit port TX1 of the second transmit module 132 is connected to the second power output port Σ2 of the first COM module 114, and the second transmit port TX2 of the second transmit module 132 is connected to the second power output port Σ2 of the second COM module 124.

[0056] In addition, please continue to refer to Figure 1 , the first transmit module 131 and the second transmit module 132 also have two receive ports, specifically a first receive port RX1 and a second receive port RX2. Among them, the first transmit module 131 is connected to the first transceiver control module (the first TX / RX control module 111) in the first device 110 through the first receive port RX1 and the second receive port RX2. In addition, the second transmit module 132 is also connected to the second transceiver control module (the second TX / RX control module 121) in the second device 120 through the first receive port RX1 and the second receive port RX2 to return the intermodulation signal to the corresponding transceiver control module.

[0057] Specifically, as Figure 1 and Figure 3As shown, the first transmission module 13 is configured to divide a first radio frequency signal into multiple first radio frequency signals (e.g., 8 radio frequency signals), and transmit the multiple first radio frequency signals to multiple ports (e.g., 8 ports) for multi-port intermodulation testing of the device under test; and is further configured to transmit the first intermodulation signal generated by the device under test to the first transceiver control module (the first TX / RX control module 111) in the first device 110.

[0058] Further, please continue to refer to Figure 1 and Figure 3 , in some preferred embodiments, the first transmission module of this embodiment includes a second combiner, specifically an 8-way combiner, a switch component, and multiple first multiplexers. Based on the fact that the first transmission module has two transmission ports, therefore, two 8-way combiners corresponding to its two transmission ports are provided in the first transmission module. The input ports of the two 8-way combiners are respectively connected to the first power output port Σ1 of the first COM module 114 and the first power output port Σ1 of the second COM module 124 through the transmission port TX1 of the first transmission module 131. The output ports of the two 8-way combiners are connected to multiple multiplexers through the switch component. The 8-way combiner divides the signal into 8 first radio frequency signals. Thus, each 8-way combiner is correspondingly connected to 8 multiplexers, namely multiplexer 1 to multiplexer 8.

[0059] Specifically, the second combiner is configured to divide the first radio frequency signal in the first device into multiple first radio frequency signals; the switch component is configured to switch each first radio frequency signal to the transmission port of the corresponding first multiplexer.

[0060] The first transmission module of this embodiment has 8 test ports, and the same port supports the transceiver channels of two frequency bands at the same time to support the power and reflection intermodulation testing of 16 ports at 1800 and 2100.

[0061] Based on the above structure, the specific test principle of the first transmission module in this embodiment is as follows: The TX1 signal is divided into 8 power signals through a 1-to-8 combiner, and is respectively switched to the TX1 port of the multiplexer through the switching of the switch component, to meet the simultaneous power transmission test of the ports Port1 - Port8 of the first transmission module. If it is necessary to test some individual test ports, other ports can be switched to the LOAD port of the switch component; The TX2 power signal is divided into 8 power signals through a 1-to-8 combiner, and is respectively switched to the TX2 port of the multiplexer through the switching of the switch component, to meet the simultaneous power transmission test of the ports Port1 - Port8 of the module. If it is necessary to test some individual test ports, other ports can be switched to the LOAD port of the switch component. The intermodulation signals generated by the device under test at the ports Port1 - Port8 are returned to the RX1 port and RX2 port of the multiplexer, and the 1-to-8 switch 1 and the 1-to-8 switch 2 transmit the intermodulation signals to the module RX1 and RX2 ports through switch combining.

[0062] Furthermore, as Figure 3 shown, the first transmission module further includes two first switches and a plurality of second multiplexers connected to each switch. Each first switch is also connected to the first transceiver control module through a receiving port, and each switch uses a 1-to-8 switch. Each 1-to-8 switch is correspondingly connected to 8 multiplexers. The first switch is used to transmit the first intermodulation signal returned to the plurality of second multiplexers to the first transceiver control module through switch combining.

[0063] Similarly, as Figure 1 and Figure 4 shown, the second transmission module also has 8 test ports. The same port supports the transceiver channels of two frequency bands simultaneously, to support the power and reflection intermodulation tests of the 1800 and 2100 for 16 ports. Specifically, the second transmission module is used to divide the second radio frequency signal into multiple second radio frequency signals (for example, 8 radio frequency signals), and transmit the multiple second radio frequency signals to multiple ports (for example, 8 ports) to perform multi-port intermodulation tests on the device under test; and is also used to transmit the second intermodulation signal generated by the device under test to the second transceiver control module in the second device.

[0064] It should be understood that the second transmission module in this embodiment also has the above structure, that is, it has two 1-to-8 combiners, and is divided into 8 second radio frequency signals through the 1-to-8 combiner. Thus, each 1-to-8 combiner is correspondingly connected to 8 multiplexers, and is respectively switched to the TX1 port of the multiplexer through the switching of the switch component. And it also has two first switches, specifically using 1-to-8 switches, to meet the simultaneous power transmission test of the ports Port1 - Port8 of the module, etc. Its test principle is the same as that of the first transmission module. Please refer to the previous records and will not be elaborated here.

[0065] The first transmitting module and the second transmitting module of this embodiment each include 8 test ports, which can support simultaneous power transmission of 16 ports and can also transmit the power of any port to test the reflection intermodulation. Of course, the first receiving module and the second receiving module each contain 8 test ports and can also support sequential testing of transmission intermodulation for 16 ports.

[0066] In summary, the first transmitting module and the second transmitting module of this embodiment can support power and reflection intermodulation tests for 1800 and 2100 of 16 ports (Port1 - Port16), where the power of each port of (Port1 - Port16) is 2 x 41 dBm. In addition, the first transmitting module (Port1 - Port8) or the second transmitting module (Port9 - Port16) meets the requirement of simultaneous power output testing for 8 ports, and the power of each port is 2 x 44 dBm.

[0067] Furthermore, as Figure 1 shown, the transmission intermodulation unit includes a first receiving module 141 and a second receiving module 142. The first receiving module 141 is connected to the first transceiver control module (the first TX / RX control module 111) and the first transmitting module in the first device 110, and the second receiving module 142 is connected to the second transceiver control module (the second TX / RX control module 121) and the second transmitting module 132 in the second device 120.

[0068] Specifically, the first receiving module is used to receive the first intermodulation signal of the first transmitting module and transmit the first intermodulation signal to the first transceiver control module in the first device. The second receiving module is used to receive the second intermodulation signal of the second transmitting module and transmit the second intermodulation signal to the second transceiver control module in the second device.

[0069] Furthermore, in some preferred embodiments, as Figure 1 and Figure 5 、 Figure 6 shown, since the first receiving module 141 has two receiving ports, namely the first receiving port RX1 and the second receiving port RX2, correspondingly, the first receiving module includes two second switches. The two second switches are respectively connected to the first transceiver control module (the first TX / RX control module 111) through the first receiving port RX1 and the second receiving port RX2, and the second switch is a 1-to-8 switch, and each second switch is connected to 8 third multiplexers, specifically including multiplexer 1 to multiplexer 8.

[0070] Specifically, as Figure 5 and Figure 6As shown, the second switch is used to switch the intermodulation signals transmitted to multiple third multiplexers to the receiving port through the combination of each switch, and transmit them to the transceiver control module. Then, through the RX1 channels of multiplexers 1 - 8, and then sequentially switch to the module RX1 port through the 1 - to - 8 switch 1. The TX channels of multiplexers 1 - 8 are all connected to the transmission load component.

[0071] It should be understood that the second receiving module of this embodiment also has the above structure. For example, two second switches and 8 multiplexers connected to each second switch, etc. For specific reference, please refer to the previous records and will not be elaborated here.

[0072] The first receiving module and the second receiving module of this embodiment can support the transmission intermodulation test of 1800 and 2100 for 16 ports, support dual - frequency combination, reflection transmission intermodulation test function, meet the simultaneous output power test for 16 ports, with a power of 2x41dBm per port. At the same time, it also meets the simultaneous output power test for any number of ports from 1 - 16 ports (arbitrary configuration), and meets the simultaneous output power test for 8 ports, with a power of 2X44dBm per port, and also meets the simultaneous output power test for any number of ports from 1 - 8 ports (arbitrary configuration).

[0073] Next, several specific embodiments will be combined to further illustrate the test scenarios of the multi - port dual - frequency intermodulation test system:

[0074] Embodiment 1

[0075] This example is illustrated by taking the simultaneous output power test of 8 ports of the first device as an example:

[0076] Combined with Figures 1 to 6As shown, the first COM module 114 of the first device 110 emits a first carrier signal through the power output port Σ. The power output port Σ can be connected to the TX1 port of the first transmitting module 131 or the TX2 port of the first transmitting module 131 (the TX1 and TX2 frequency bands are different). When the power output port Σ is connected to the TX1 port of the first transmitting module 131, the first carrier signal is split into 8 first carrier signals by the power splitting module in the first transmitting module 131 for the first carrier signal of the combining module. The 8 first carrier signals are transmitted to the TX1 channels of all multiplexers in the first transmitting module 131, and the power signal corresponding to the first carrier is transmitted to the Port1, Port2, … Port8 ports through the ANT port of the multiplexer, and the 8 ports can perform power tests simultaneously; when the power output port Σ is connected to the TX2 port of the first transmitting module 131, the first carrier signal is split into 8 first carrier signals by the power splitting module in the first transmitting module 131 for the first carrier signal of the combining module. The 8 first carrier signals are transmitted to the TX2 channels of the multiplexers in the first transmitting module 131, and the power signal is transmitted to the Port1, Port2, … Port8 ports through the ANT port of the multiplexer, and the 8 ports can perform power tests simultaneously; the Port1 - Port8 ports of the first transmitting module 131 can be simultaneously connected to the device under test (such as a single - port device like an antenna) for inter - modulation tests. The 8 - port test is mainly applied to the 2x44dBm scenario test.

[0077] Example 2

[0078] This example is illustrated by taking the 8 - port simultaneous output power test of the second device as an example:

[0079] Combined with Figures 1 to 6As shown, the second COM module 124 of the second device 120 emits a second carrier signal through the power output port Σ. The power output port Σ can be connected to the TX1 port of the second transmitting module 132 or the TX2 port of the second transmitting module 132 (the TX1 and TX2 frequency bands are different). When the power output port Σ is connected to the TX1 port of the second transmitting module 132, the second carrier signal is split into 8 second carrier signals by the power splitting module in the second transmitting module 132 for the second carrier signal of the combining module. The 8 second carrier signals are transmitted to the TX1 channels of all multiplexers in the second transmitting module 132, and the power signal corresponding to the second carrier is transmitted to the Port1, Port2, … Port8 ports through the ANT port of the multiplexer, and the 8 ports can perform power-on tests simultaneously. When the power output port Σ is connected to the TX2 port of the second transmitting module 132, the second carrier signal is split into 8 second carrier signals by the power splitting module in the second transmitting module 132 for the second carrier signal of the combining module. The 8 second carrier signals are transmitted to the TX2 channels of the multiplexers in the second transmitting module 132, and the power signal is transmitted to the Port1, Port2, … Port8 ports through the ANT port of the multiplexer, and the 8 ports can perform power-on tests simultaneously. The Port1 - Port8 ports of the second transmitting module 132 can be connected to the device under test (such as a single-port device like an antenna) simultaneously for intermodulation tests. The 8-port test is mainly applied to the 2x44dBm scenario test.

[0080] Embodiment 3

[0081] This example is described by taking the simultaneous power output test of the 16 ports of the first device as an example:

[0082] Combined with Figures 1 to 6 As shown, the first COM module 114 of the first device 110 emits a first carrier signal through the first power output port Σ1 and the second power output port Σ2. The first power output port Σ1 is connected to the TX1 port of the first transmitting module 131. The first carrier signal is split into 8 first carrier signals by the power splitting module in the first transmitting module 131 for the first carrier signal of the combining module. The 8 first carrier signals are transmitted to the TX1 channels of all multiplexers in the first transmitting module 131, and the power signal corresponding to the first carrier is transmitted to the Port1, Port2, … Port8 ports through the ANT port of the multiplexer, and the 8 ports can perform power-on tests simultaneously.

[0083] The first COM module 114 of the first device 110 emits a first carrier signal through the second power output port Σ2. The second power output port Σ2 is connected to the TX1 port of the second transmission module 132. The first carrier signal is split into 8 first carrier signals by the power splitting module in the second transmission module 132 for the first carrier signal of the multiplexing module. The 8 first carrier signals are transmitted to the TX1 channel of the multiplexer in the second transmission module 132. The power signal is transmitted to ports Port9, Port10, … Port16 through the ANT port of the multiplexer. The 16 ports can perform power tests simultaneously. The Port1 - Port16 ports of the first transmission module and the second transmission module can be connected to the device under test (such as a single - port device like an antenna) simultaneously for inter - modulation tests. The 16 - port test is mainly applied to the 2x41dBm scenario test.

[0084] Embodiment 4

[0085] This example is illustrated by taking the simultaneous power output test of the 16 ports of the second device as an example:

[0086] Combined with Figures 1 to 6 As shown, the second COM module 124 of the second device 120 emits a second carrier signal through the first power output port Σ1 and the second power output port Σ2. The first power output port Σ1 is connected to the TX2 port of the first transmission module 131. The second carrier signal is split into 8 second carrier signals by the power splitting module in the first transmission module 131 for the second carrier signal of the multiplexing module. The 8 second carrier signals are transmitted to the TX2 channels of all multiplexers in the first transmission module 131. The power signal corresponding to the second carrier is transmitted to ports Port1, Port2, … Port8 through the ANT port of the multiplexer. The 8 ports can perform power tests simultaneously.

[0087] The second COM module 124 of the second device 120 emits a second carrier signal through the second power output port Σ2. The second power output port Σ2 is connected to the TX2 port of the second transmission module 132. The second carrier signal is split into 8 second carrier signals by the power splitting module in the second transmission module 132 for the second carrier signal of the multiplexing module. The 8 second carrier signals are transmitted to the TX2 channel of the multiplexer in the second transmission module 132. The power signal is transmitted to ports Port9, Port10, … Port16 through the ANT port of the multiplexer. The 16 ports can perform power tests simultaneously. The Port1 - Port16 ports of the first transmission module and the second transmission module can be connected to the device under test (such as a single - port device like an antenna) simultaneously for inter - modulation tests. The 16 - port test is mainly applied to the 2x41dBm scenario test.

[0088] In summary, the 8-port or 16-port of the present invention can both achieve the combined scenario test of the first transmit port TX1 and the second transmit port TX2, which are respectively: TX1 dual-tone and TX2 dual-tone test, TX1 single-tone and TX2 dual-tone test, TX1 dual-tone and TX2 single-tone test.

[0089] Exemplarily, the 8-port TX1 dual-tone and TX2 dual-tone test is specifically as follows: The power output port Σ of the first COM module is connected to the first transmit port TX1 of the first transmit module, and the power output port Σ of the second COM module is connected to the second transmit port TX2 of the first transmit module. Port1-Port8 transmit power simultaneously, which is applied to the dual-band 8-port antenna test.

[0090] The present invention satisfies the requirement that the 16-port dual-band can transmit power simultaneously on the same port, and can transmit 1800 single-tone and 2100 dual-tone, 1800 dual-tone and 2100 single-tone, 1800 dual-tone and 2100 dual-tone.

[0091] The present invention provides a multi-port dual-band intermodulation test system, which has the following beneficial effects:

[0092] First, the system of the present invention is based on modular design and has interchangeability and universality;

[0093] Second, the intermodulation port configuration of the system of the present invention is flexible, and the ports are designed with dual bands. One channel port has both receiving and transmitting channels of two bands at the same time, and has a multi-channel design, supporting multi-channel simultaneous power transmission, meeting the multi-port simultaneous power transmission test;

[0094] Third, the system of the present invention can meet the 16-port simultaneous output power test, and also meet the test of simultaneous output power of any number of ports from 1 to 16, and further, it also meets the 8-port simultaneous output power test, and also meets the test of simultaneous output power of any number of ports from 1 to 8. It can realize the combined intermodulation of single-tone and dual-tone power transmission at 1800 and 2100M, and is an integrated and highly reusable intermodulation test system.

[0095] It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principle of the present invention, and the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A multi-port dual-frequency intermodulation test system, characterized in that Including: A first device, a second device, a transmit intermodulation unit, and a transmission intermodulation unit both connected to the first device and the second device; wherein, The first device and the second device are used to provide carrier signals and synthesize them into radio frequency signals; both the first device and the second device include a transceiver control module, at least one power amplifier module, and a COM module; wherein, The output port of the transceiver control module is connected to the input port of the power amplifier module, the output port of the power amplifier module is connected to the transmit port of the COM module, and the transmit port of the transmit intermodulation unit is connected to the power output port of the COM module; The transceiver control module is used to provide a carrier signal and receive the echo signal of the carrier signal; The power amplifier module is used to transmit the carrier signal to the COM module; The COM module is used to synthesize the carrier signal into a radio frequency signal and transmit it to the transmit intermodulation unit; The COM module includes a hybrid coupler, a first combiner, a high-power switch, and a power divider; wherein, The hybrid coupler is used to transmit the carrier signal to the common port of the high-power switch; The first combiner is used to combine the carrier signals into one radio frequency signal through combining and transmit it to the power output port; The power divider is used to divide the synthesized one radio frequency signal into two channels; The transmit intermodulation unit is used to divide the radio frequency signal into 8 radio frequency signals and transmit them to 8 ports respectively, and the ports support transceiver channels of two frequency bands to perform intermodulation tests on the device under test; The transmission intermodulation unit is connected to the transceiver control module and the transmit intermodulation unit, has multiple ports and each port supports transceiver channels of two frequency bands, and is used to perform transmission intermodulation tests on the intermodulation signals generated by the device under test.

2. The system according to claim 1, wherein The number of the power amplifier modules is two, and the input port and output port of one of the power amplifier modules are respectively connected to the first output port of the transceiver control module and the first transmit port of the COM module; The input port and output port of the other power amplifier module are respectively connected to the second output port of the transceiver control module and the second transmit port of the COM module.

3. The system according to claim 1, characterized in that, The transmit intermodulation unit includes a first transmit module and a second transmit module connected to the power output port of the COM module, the first transmit module is also connected to the transceiver control module in the first device, and the second transmit module is also connected to the transceiver control module in the second device; The first transmit module is used to divide the radio frequency signal into multiple radio frequency signals and transmit the multiple radio frequency signals to multiple ports to perform multi-port intermodulation tests on the device under test; and is also used to transmit the intermodulation signals generated by the device under test to the transceiver control module in the first device; The second transmitting module is configured to divide the radio frequency signal into multiple radio frequency signals, and transmit the multiple radio frequency signals to multiple ports for multi-port intermodulation testing of the device under test; and is further configured to transmit the intermodulation signals generated by the device under test to the transceiver control module in the second device respectively.

4. The system according to claim 3, wherein Both the first transmitting module and the second transmitting module include a second combiner, a switch assembly, and multiple first multiplexers. The input port of the second combiner is connected to the transmitting port, and the output port of the second combiner is connected to the first multiplexer through the switch assembly; The second combiner is configured to divide the radio frequency signal into multiple radio frequency signals; The switch assembly is configured to switch each radio frequency signal to the signal output port of the corresponding first multiplexer.

5. The system according to claim 4, wherein Both the first transmitting module and the second transmitting module further include a switch connected to the receiving port, and multiple second multiplexers connected to the switch; The switch is configured to transmit the intermodulation signals returned to the multiple second multiplexers to the transceiver control module through switch combining.

6. The system according to claim 5, wherein The first combiner adopts a 1-to-2 combiner; and / or, The second combiner adopts a 1-to-8 combiner; and / or, The shown switch adopts a 1-to-8 switch.

7. The system according to claim 6, characterized in that, The transmission intermodulation unit includes a first receiving module and a second receiving module. The first receiving module is connected to the transceiver control module and the first transmitting module in the first device, and the second receiving module is connected to the transceiver control module and the second transmitting module in the second device; The first receiving module is configured to receive the intermodulation signal of the first transmitting module, and transmit the intermodulation signal to the transceiver control module in the first device; The second receiving module is configured to receive the intermodulation signal of the second transmitting module, and transmit the intermodulation signal to the transceiver control module in the second device.

8. The system according to claim 7, wherein Both the first transmitting module, the second transmitting module, the first receiving module, and the second receiving module have 8 test ports, and each test port has transceiver channels for 2 frequency bands simultaneously.

Images