CN219122317U

CN219122317U - Radio frequency device detection system

Info

Publication number: CN219122317U
Application number: CN202223019894.8U
Authority: CN
Inventors: 朱超
Original assignee: Guilin Yiyuan Communication Technology Co ltd
Current assignee: Guilin Yiyuan Communication Technology Co ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-06-02
Anticipated expiration: 2032-11-14

Abstract

The embodiment of the application relates to the field of detection and discloses a radio frequency device detection system. The radio frequency device detection system of the application comprises: the system comprises a network analyzer, a signal generator, a measuring module, a first switch and a second switch; the input end of the tested radio frequency device is respectively connected with the output end of the network analyzer and the output end of the signal generator through the first switch; the first switch is used for switching connection between the output end of the network analyzer and the output end of the signal generator; the output end of the tested radio frequency device is respectively connected with the input end of the network analyzer and the input end of the measuring module through the second switch; the second switch is used for switching connection between the input end of the network analyzer and the input end of the measuring module. All performance parameters of the radio frequency device can be detected through one detection system, the detection process is simplified, and the detection efficiency is improved.

Description

Radio frequency device detection system

Technical Field

The embodiment of the application relates to the field of detection, in particular to a radio frequency device detection system.

Background

As mobile devices become more powerful, the supported network bands become more and more, and the radio frequency front-end module becomes an integral part of the mobile devices. For example, for devices that need to be networked, at least 2G, 3G, 4G, wifi, GPS, etc. network systems need to be supported, and each system needs to have a respective rf front-end module, where passive rf devices in the rf front-end module are an important part of the rf front-end module, and passive rf devices typically include SAW filters, diplexers, and so on. The performance parameters of the conventional passive radio frequency devices are unstable, so that before the conventional passive radio frequency devices are put into use, whether the performance parameters of the radio frequency devices are normal or not needs to be verified, and the passive radio frequency devices meeting the requirements are selected for use.

At present, in order to detect performance parameters of a passive radio frequency device, the related art generally performs testing through different systems, so that the passive radio frequency device is confused in the process of switching different detection systems, a great deal of manual participation is needed, and the testing efficiency of the passive radio frequency device is low. Thus, there are also solutions in the related art in which all detection devices are integrated into one detection system, however, this approach still cannot cope with different detection requirements for the detected rf device.

Disclosure of Invention

The embodiment of the application aims to provide a radio frequency device detection system, which can detect all performance parameters of a radio frequency device through one detection system, simplify the detection process and improve the detection efficiency.

In order to solve the above technical problem, an embodiment of the present application further provides a radio frequency device detection system, including: the system comprises a network analyzer, a signal generator, a measuring module, a first switch and a second switch; the input end of the tested radio frequency device is respectively connected with the output end of the network analyzer and the output end of the signal generator through the first switch; the output end of the tested radio frequency device is respectively connected with the input end of the network analyzer and the input end of the measuring module through the second switch; the output end of the signal generator is connected with the first switch through a first branch and a second branch respectively; the first switch is used for switching connection among the output end of the network analyzer, the first branch and the second branch; the first branch is as follows: the output end of the signal generator is connected with the first switch; the second branch comprises an amplifying module and a first filtering module, wherein the input end of the amplifying module is connected with the output end of the signal generator, the output end of the amplifying module is connected with the input end of the first filtering module, and the output end of the first filtering module is connected with the first switch; the input end of the measuring module is connected with the second switch through a third branch, a fourth branch and a fifth branch respectively; the second switch is used for switching connection among the input end of the network analyzer, the third branch, the fourth branch and the fifth branch; the third branch is as follows: the input end of the measuring module is connected with the second switch; the fourth branch comprises a first attenuator, the input end of the first attenuator is connected with the second switch, and the output end of the first attenuator is connected with the input end of the measuring module; the fifth branch circuit comprises a second attenuator and a second filtering module, wherein the input end of the second attenuator is connected with the second switch, the output end of the second attenuator is connected with the input end of the second filtering module, and the output end of the second filtering module is connected with the input end of the measuring module.

Compared with the prior art, the embodiment of the application has the advantages that the network analyzer, the signal generator and the measuring module are arranged in the same detecting system, and when the tested radio frequency device is tested, different parameters can be detected through the switching states of the first switch and the second switch, so that all performance parameters of the radio frequency device can be detected through the same detecting system, the detecting process is simplified, and the detecting efficiency is improved; and through set up first branch road, the second branch road that can switch to connect between signal generator and first switch, set up third branch road, fourth branch road, the fifth branch road that can switch to connect between second switch and measurement module, when detecting, detecting system can select corresponding branch road according to different test signals for the detectable performance parameter scope of whole detecting system is wider, detects more comprehensively.

In addition, the system further comprises a third switch; the output end of the signal generator is connected with the first switch through a first branch and a second branch respectively, and specifically comprises: the output end of the signal generator is connected with the moving end of the third switch, the first fixed end of the third switch is connected with the first switch through the first branch, and the second fixed end of the third switch is connected with the first switch through the second branch. By the mode, the branches running in the first branch and the second branch can not be interfered by the other branch, and the detection accuracy is improved.

In addition, the first filtering module comprises N low-pass filters with different specifications, a fourth switch and a fifth switch; the fourth switch and the fifth switch respectively comprise N motionless ends; the active end of the fourth switch is connected with the output end of the amplifying module, the N inactive ends of the fourth switch are respectively connected with the N input ends of the low-pass filter, the N output ends of the low-pass filter are respectively connected with the N inactive ends of the fifth switch, and the active end of the fifth switch is connected with the second switch. By setting the low-pass filters with different specifications, the low-pass filters with corresponding specifications can be switched according to actual requirements, detection with different specifications is realized, and the range of detectable parameters of a detection system is improved.

In addition, the system further includes a sixth switch; the input end of the measuring module is connected with the second switch through a third branch, a fourth branch and a fifth branch respectively, and specifically comprises: the input end of the measuring module is connected with the movable end of the sixth switch, the first fixed end of the sixth switch is connected with the second switch through the third branch, the second fixed end of the sixth switch is connected with the second switch through the fourth branch, and the third fixed end of the sixth switch is connected with the second switch through the fifth branch. By the mode, the branches running in the third branch, the fourth branch and the fifth branch can not be interfered by other branches, and the detection accuracy is improved.

In addition, the second filtering module comprises M high-pass filters with different specifications, a seventh switch and an eighth switch; the seventh switch and the eighth switch respectively comprise M motionless ends; the movable end of the seventh switch is connected with the output end of the second attenuator, the M fixed ends of the seventh switch are respectively connected with the input ends of the M high-pass filters, the M fixed ends of the eighth switch are respectively connected with the output ends of the M high-pass filters, and the movable end of the eighth switch is connected with the input end of the measurement module. Through setting up the high pass filter of different specifications, can switch to the high pass filter of corresponding specification according to actual demand, realize the detection of different specifications, improved the scope of detecting system detectable parameter.

In addition, the system also comprises a coupler and a ninth switch; the movable end of the first switch is connected with the input end of the tested radio frequency device, and specifically comprises: the dynamic end of the first switch is connected with the input end of the coupler, and the first output end of the coupler is connected with the tested radio frequency device; the second output end of the coupler is also connected to the moving end of the ninth switch, the first fixed end of the ninth switch is connected with a resistor, and the second fixed end of the ninth switch is connected with the fourth fixed end of the sixth switch.

In addition, the measuring module comprises a spectrum analyzer and a communication tester; the input end of the spectrum analyzer and the input end of the communication tester are used as the input end of the measurement module together.

In addition, the devices except the network analyzer, the signal generator and the measuring module in the system are all arranged on a chip.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a schematic diagram of a RF device detection system according to one embodiment of the present application;

FIG. 2 is a schematic structural diagram of a first branch and a second branch according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a first filtering module according to an embodiment of the present application;

fig. 4 is a schematic circuit diagram of a specific circuit structure of a first filtering module according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a third branch, a fourth branch, and a fifth branch according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a second filtering module according to an embodiment of the present application;

fig. 7 is a schematic circuit diagram of a specific circuit structure of a second filtering module according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a radio frequency device detection system according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a measurement module according to an embodiment of the present application;

fig. 10 is a schematic diagram of a specific circuit structure of a radio frequency device detection system according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, as will be appreciated by those of ordinary skill in the art, in the various embodiments of the present application, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not be construed as limiting the specific implementation of the present application, and the embodiments may be mutually combined and referred to without contradiction.

An embodiment of the present application relates to a radio frequency device detection system, as shown in fig. 1, which is a schematic structural diagram of the radio frequency device detection system in the present embodiment, including: the system comprises a network analyzer 101, a signal generator 102, a measurement module 103, a first switch 21, a second switch 22, an amplification module 105, a first filter module 106, a first attenuator 107, a second attenuator 108 and a second filter module 109.

Specifically, the input end of the tested radio frequency device 104 is respectively connected with the output end of the network analyzer 101 and the output end of the signal generator 102 through the first switch 21; the output end of the tested radio frequency device 104 is respectively connected with the input end of the network analyzer 101 and the input end of the measuring module 103 through the second switch 22.

Specifically, the output end of the signal generator 102 is connected to the first switch 21 through a first branch and a second branch, respectively; the first switch 21 is used for switching connection among an output end of the network analyzer 101, a first branch and a second branch; the first branch is: the output end of the signal generator 102 is connected with the first switch 21; the second branch circuit comprises an amplifying module 105 and a first filtering module 106, wherein the input end of the amplifying module 105 is connected with the output end of the signal generator 102, the output end of the amplifying module 105 is connected with the input end of the first filtering module 106, and the output end of the first filtering module 106 is connected with the first switch 21.

Specifically, the input end of the measurement module 103 is connected with the second switch 22 through a third branch, a fourth branch and a fifth branch respectively; the second switch 22 is used for switching connection among the input end, the third branch, the fourth branch and the fifth branch of the network analyzer 101; the third branch is: the input end of the measuring module 103 is connected with the second switch 22; the fourth branch circuit comprises a first attenuator 107, the input end of the first attenuator 107 is connected with the second switch 22, and the output end of the first attenuator 107 is connected with the input end of the measurement module 103; the fifth branch circuit comprises a second attenuator 108 and a second filtering module 109, wherein the input end of the second attenuator 108 is connected with the second switch 22, the output end of the second attenuator 108 is connected with the input end of the second filtering module 109, and the output end of the second filtering module 109 is connected with the input end of the measuring module 103.

In the embodiment, the network analyzer 101, the signal generator 102 and the measurement module 103 are all arranged in one detection system, so that when the tested radio frequency device 104 is tested, detection of different parameters can be performed through the switching states of the first switch and the second switch, and therefore all performance parameters of the radio frequency device can be detected through one detection system, the detection process is simplified, and the detection efficiency is improved; and through setting up the first branch road, the second branch road that can switch to connect between signal generator 102 and first switch 21, set up the third branch road, the fourth branch road, the fifth branch road that can switch to connect between second switch 22 and measurement module 103, during the detection, detecting system can select corresponding branch road according to different test signals for the detectable performance parameter scope of whole detecting system is wider, detects more comprehensively.

Specifically, when the detection system needs to use the network analyzer 101 to detect, the first switch 21 is switched to the output end of the network analyzer 101, the second switch 22 is switched to the input end of the network analyzer 101, the network analyzer 101 is connected with the tested radio frequency device 104, and the network analyzer 101 can send a test signal to the tested radio frequency device 104 and receive the feedback signal analysis effect of the tested radio frequency device 104, so as to detect parameters such as insertion loss, standing wave ratio, return loss, isolation, attenuation, coupling degree, orientation degree and the like; when the signal generator 102 is needed to be used in the detection system, the first switch 21 is switched to the first branch or the second branch so as to be connected to the signal generator 102, the second switch 22 is switched to the third branch or the fourth branch or the fifth branch so as to be connected to the measurement module 103, the signal generator 102 sends out a test signal, and the measurement module 103 receives a feedback signal, so that parameters such as a ripple coefficient, a maximum input power, a harmonic wave and the like can be detected through the signal generator 102 and the measurement module 103.

In particular, the first Switch 21 may be a single pole, multiple throw Switch, which may be provided by a Switch, through which switching of different branches may be achieved. Therefore, the first switch 21 of the present embodiment includes one moving end and three fixed ends, the moving end of the first switch 21 is connected to the input end of the tested radio frequency device 104, the first fixed end of the first switch 21 is connected to the output end of the network analyzer 101, the second fixed end of the first switch 21 is connected to the output end of the signal generator 102 through the first branch, and the third fixed end of the first switch 21 is connected to the output end of the signal generator 102 through the second branch, so that the first switch 21 can be connected to different fixed ends through the moving end, and thus connected to different branches according to different detection requirements, so as to realize detection of different performance parameters.

It should be noted that the first switch 21 may be one switch or a combination of a plurality of switches, as long as the finally formed first switch 21 meets the above-described requirements.

In one embodiment, the radio frequency device detection system of the present embodiment further includes a third switch; the output end of the signal generator 102 is connected with the first switch through the first branch and the second branch respectively, specifically: the output end of the signal generator 102 is connected with the moving end of the third switch, the first fixed end of the third switch is connected with the first switch through the first branch, and the second fixed end of the third switch is connected with the first switch through the second branch.

As shown in fig. 2, in the present embodiment, the first branch and the second branch are schematic structures, the output end of the signal generator 102 is connected to the moving end of the third switch 23, the first stationary end of the third switch 23 is connected to the first switch 21 through the first branch, and the second stationary end of the third switch 23 is connected to the first switch 21 through the second branch. That is, the first stationary terminal of the third switch 23 is connected to the second stationary terminal of the first switch 21, and the second stationary terminal of the third switch 23 is connected to the third stationary terminal of the first switch 21 through the second branch.

It should be noted that, in the case where only the first switch 21 is provided, although switching between the first branch and the second branch may be implemented, when only one of the first branch and the second branch is turned on, since the signal generator 102 is respectively connected to the first branch and the second branch, the test signals output by the signal generator 102 are respectively transmitted along the first branch and the second branch, so that the running branch cannot receive the complete test signals, and the accuracy of detection is affected. Therefore, in this embodiment, the output end of the signal generator 102 is provided with two branches capable of being switched and connected through the third switch 23, when a certain branch needs to be conducted, the first switch 21 and the third switch 23 are respectively conducted to the corresponding branches, and the other branch is in a completely disconnected state, so that the running branch is not interfered by the other branch, and the detection accuracy is improved.

In one embodiment, the first filtering module includes N low pass filters of different specifications, a fourth switch, and a fifth switch.

As shown in fig. 3, the first filtering module 106 of the present embodiment includes N low-pass filters 1061, a fourth switch 24, and a fifth switch 25 with different specifications; the fourth switch 24 and the fifth switch 25 respectively comprise N motionless ends; the active end of the fourth switch 24 is connected to the output end of the amplifying module 105 (refer to fig. 3), the N inactive ends of the fourth switch 24 are respectively connected to the input ends of the N low-pass filters 1061, the output ends of the N low-pass filters 1061 are respectively connected to the N inactive ends of the fifth switch 25, and the active end of the fifth switch is connected to the first switch 21 (refer to fig. 3), i.e. to the third inactive end of the first switch 21.

Specifically, the amplifying module 105 of the present embodiment is a power amplifier for amplifying the test signal emitted by the signal generator 102.

As shown in fig. 4, the specific circuit structure of the first filtering module in this embodiment is shown, and the fourth Switch 24 and the fifth Switch 25 are all single-pole multi-throw switches, which may be provided by one Switch, so long as the same number of stationary terminals as the number of the low-pass filters 1061 can be provided, so that the fourth Switch 24 and the fifth Switch 25 may be switched to different low-pass filters 1061.

Specifically, when one low-pass filter 1061 is selected, the fourth switch 24 and the fifth switch 25 are required to be switched to the corresponding low-pass filter 1061, that is, the low-pass filters 1061 switched by the fourth switch 24 and the fifth switch 25 are identical.

Specifically, the stationary end of the first switch 21 of the present embodiment is respectively connected to three branches, and the first switch 21 can implement switching connection among the network analyzer 101, the first branch, and the second branch. When the network analyzer 101 is required to be used for detection, the first switch 21 and the second switch 22 are both switched to be connected to the network analyzer 101. When the signal generator 102 is required to be used for detection, the test signal output by the signal generator 102 is determined according to the detected parameter, when the test signal output by the signal generator 102 is larger, the tested radio frequency device 104 needs a larger test signal for testing, the first switch 21 and the third switch 23 are both connected with the first branch, the second switch 22 is switched to the measurement module 103, the test signal is directly transmitted to the tested radio frequency device 104, the tested radio frequency device 104 transmits the feedback signal to the measurement module 103, and the measurement module 103 detects the feedback signal.

It should be noted that, when the test signal sent by the signal generator 102 is smaller and the tested radio frequency device 104 needs a larger test signal, the first switch 21 and the third switch 23 both switch on the second branch, the second switch 22 is switched to the measurement module 103, the amplification module 105 in the second branch amplifies the test signal sent by the signal generator 102, and the amplification module 105 not only amplifies the original test signal, but also generates a nonlinear signal with larger frequency in the process of amplifying the test signal; therefore, the low-pass filter 1061 is provided in this embodiment to filter the nonlinear signal with a larger frequency, so that the purity of the amplified test signal is higher, and the accuracy of detection is improved.

In this embodiment, by setting the low-pass filters 1061 with different specifications, the low-pass filters 1061 with corresponding specifications can be switched according to actual requirements, so as to realize detection with different specifications, and improve the range of detectable parameters of the detection system.

It should be noted that, if the switch modules are only disposed at the input ends of the N low-pass filters 1061, although switching of the low-pass filters with different types may be achieved, since the output ends of the N low-pass filters 1061 are commonly connected together, when the amplified test signal passes through the output end of one of the low-pass filters 1061, the test signal will flow back to the other low-pass filters 1061, resulting in reflection of the branch where the other low-pass filters 1061 are located, thereby affecting the normal low-pass filters 1061 and reducing the accuracy of detection. If the switch modules are only disposed at the output ends of the N low-pass filters 1061, although switching of the low-pass filters 1061 with different types can be achieved, since the input ends of the N low-pass filters 1061 are commonly connected together, the amplified test signals are transmitted to each low-pass filter 1061 when passing through the input ends of the N low-pass filters 1061, so that the conducted low-pass filters 1061 cannot receive the complete test signals, which affects the accuracy of detection. It can be seen that the placement of a switch module at only one end of the N low pass filters 1061 affects the accuracy of the detection.

Therefore, in this embodiment, the switch modules are disposed at two ends of the N low-pass filters 1061, and when the switch is performed to the corresponding low-pass filter 1061, the fourth switch 24 and the fifth switch 25 are all required to be switched to the corresponding ports, so that each low-pass filter 1061 can be completely isolated from other low-pass filters 1061 during operation, and the test signal is only transmitted along the conductive low-pass filter 1061, so as to ensure the accuracy of detection.

Specifically, the second Switch 22 may be a single pole multiple throw Switch or a Switch, and may implement switching of different branches. Therefore, the second switch 22 of the present embodiment includes a movable end and four fixed ends, the movable end of the second switch 22 is connected to the output end of the tested radio frequency device 104, the first fixed end of the second switch 22 is connected to the input end of the network analyzer 101, the second fixed end of the second switch 22 is connected to the input end of the measurement module 103 through the third branch, the third fixed end of the second switch 22 is connected to the input end of the measurement module 103 through the fourth branch, and the fourth fixed end of the second switch 22 is connected to the input end of the measurement module 103 through the fifth branch.

The second switch 22 may be a single-pole multi-throw switch, or may be a combination of multiple single-pole multi-throw switches, so long as the finally formed second switch 22 meets the above requirements.

In one embodiment, the system further comprises a sixth switch; the input end of the measuring module is connected with the second switch through a third branch, a fourth branch and a fifth branch respectively, and specifically comprises: the input end of the measuring module is connected with the moving end of the sixth switch, the first fixed end of the sixth switch is connected with the second switch through the third branch, the second fixed end of the sixth switch is connected with the second switch through the fourth branch, and the third fixed end of the sixth switch is connected with the second switch through the fifth branch.

As shown in fig. 5, which is a schematic structural diagram of the third branch, the fourth branch, and the fifth branch in the present embodiment, the input end of the measurement module 103 is connected to the moving end of the sixth switch 26, the first stationary end of the sixth switch 26 is connected to the second switch 22 through the third branch, the second stationary end of the sixth switch 26 is connected to the second switch 22 through the fourth branch, and the third stationary end of the sixth switch 26 is connected to the second switch 22 through the fifth branch. That is, the first stationary end of the sixth switch 26 is connected to the second stationary end of the second switch 22 through the third branch, the second stationary end of the sixth switch 26 is connected to the third stationary end of the second switch 22 through the fourth branch, and the third stationary end of the sixth switch 26 is connected to the fourth stationary end of the second switch 22 through the fifth branch.

It should be noted that, when only the second switch 22 is provided, even if only one of the third branch, the fourth branch, and the fifth branch is turned on, when the test signal reaches the input end of the measurement module 103 through one of the branches, the output ends of the third branch, the fourth branch, and the fifth branch are collected at the input end of the measurement module 103, so that the test signal transmitted to the input end of the measurement module 103 flows back to the other branches, and a reflection phenomenon is generated, thereby affecting the accuracy of detection. Therefore, in this embodiment, three branches capable of being switched and connected are provided at the input end of the measurement module 103 through the sixth switch 26, when a certain branch needs to be conducted, the second switch 22 and the sixth switch 26 are respectively conducted to the corresponding branches, and the other branches are in a completely disconnected state, so that the running branches are not interfered by the other branches, and the detection accuracy is improved.

In one embodiment, the second filtering module includes M high pass filters of different specifications, a seventh switch, and an eighth switch.

As shown in fig. 6, the second filtering module 109 of the present embodiment includes M high-pass filters 1091, seventh switches 27, and eighth switches 28 with different specifications; the seventh switch 27 and the eighth switch 28 respectively comprise M motionless ends; the moving end of the seventh switch 27 is connected to the output end of the second attenuator 108 (refer to fig. 6), the M moving ends of the seventh switch 27 are respectively connected to the input ends of the M high-pass filters 1091, the output ends of the M high-pass filters 1091 are respectively connected to the M moving ends of the eighth switch 28, and the moving end of the eighth switch 28 is connected to the input end of the measurement module 103 (refer to fig. 6).

As shown in fig. 7, a specific circuit structure of the second filtering module of the present embodiment is shown, where the seventh Switch 27 and the eighth Switch 28 are single-pole multi-throw switches, and the single-pole multi-throw switches may be provided by one Switch, so long as the same number of stationary terminals as the number of the high-pass filters 1091 can be provided, so that the seventh Switch 27 and the eighth Switch 28 can be switched to different high-pass filters 1091.

Specifically, when one high-pass filter 1091 is selected, both the seventh switch 27 and the eighth switch 28 need to be switched to the corresponding high-pass filter 1091, that is, the high-pass filters 1091 switched by the seventh switch 27 and the eighth switch 28 are the same.

Specifically, the stationary ends of the second switch 22 in this embodiment are respectively connected to four branches, and the second switch 22 can implement switching connection among the network analyzer 101, the third branch, the fourth branch, and the fifth branch. When the network analyzer 101 is required to be used for detection, the first switch 21 and the second switch 22 are both switched to be connected to the network analyzer 101. When the signal generator 102 is required to be used for detection, the feedback signal generated by the tested radio frequency device 104 is determined according to the detected parameter, when the feedback signal generated by the tested radio frequency device 104 is smaller, the measurement module 103 can bear the feedback signal, the second switch 22 and the sixth switch 26 are both conducted on the third branch, the first switch 21 selects the corresponding branch to be connected to the signal generator 102 according to the requirement, the tested radio frequency device 104 directly transmits the feedback signal to the measurement module 103, and the measurement module 103 detects the feedback signal.

It should be noted that, when the feedback signal of the measured rf device 104 is relatively large, and the measurement module 103 cannot bear the feedback signal, the reflected signal needs to be attenuated, and the fourth branch or the fifth branch may be selectively turned on. When the fourth branch is selected, the feedback signal is attenuated by the first attenuator 107, and the measurement module 103 receives the signal transmitted by the fourth branch, so that the maximum sustainable power of the tested radio frequency device 104 can be detected. When the fifth branch is selected, since the tested radio frequency device 104 generates a harmonic with a larger frequency during testing, that is, the feedback signal has a harmonic, in order to detect whether the harmonic meets the requirement, the feedback signal is attenuated by the second attenuator 108, and the attenuated feedback signal enters the high-pass filter 1091, so that the normal attenuated feedback signal is filtered, that is, the main frequency signal is filtered, and only the harmonic is transmitted to the measurement module 103, and the measurement module 103 detects whether the harmonic has an abnormality.

According to the embodiment, by arranging the high-pass filters 1091 with different specifications, the high-pass filters 1091 with corresponding specifications can be switched according to actual requirements, detection with different specifications is realized, and the range of detectable parameters of a detection system is improved.

It should be noted that, if the switch modules are only disposed at the input ends of the M high-pass filters 1091, although switching of the high-pass filters of different types may be achieved, since the output ends of the M high-pass filters 1091 are commonly connected together, when the feedback signal after attenuation passes through the output end of one of the high-pass filters 1091, the feedback signal is caused to flow back to the other high-pass filters 1091, so that the branch where the other high-pass filters 1091 are located may generate a reflection phenomenon, thereby affecting the high-pass filters 1091 that work normally and reducing the accuracy of detection. If the switch modules are only disposed at the output ends of the M high-pass filters 1091, although switching of the high-pass filters 1091 with different types can be achieved, because the input ends of the M high-pass filters 1091 are commonly connected together, when the attenuated feedback signals pass through the input ends of the M high-pass filters 1091, the attenuated feedback signals are transmitted to each high-pass filter 1091, so that the conducted high-pass filters 1091 cannot receive the complete feedback signals, and the detection accuracy is affected. It can be seen that the placement of the switch module at only one end of the M high pass filters 1091 affects the accuracy of the detection.

Therefore, in this embodiment, the switch modules are disposed at two ends of the M high-pass filters 1091, and when the switch is switched to the corresponding high-pass filter 1091, the seventh switch 27 and the eighth switch 28 are required to be switched to the corresponding ports, so that each high-pass filter 1091 can be completely isolated from other high-pass filters 1091 during operation, and the feedback signal is transmitted only along the conductive high-pass filter 1091, so as to ensure the accuracy of detection.

In one embodiment, the system further comprises a coupler, a ninth switch; the dynamic end of the first switch is connected with the input end of the tested radio frequency device, and the method specifically comprises the following steps: the dynamic end of the first switch is connected with the input end of the coupler, and the first output end of the coupler is connected with the tested radio frequency device; the second output end of the coupler is also connected to the moving end of the ninth switch, the first fixed end of the ninth switch is connected with the resistor, and the second fixed end of the ninth switch is connected with the fourth fixed end of the sixth switch.

As shown in fig. 8, the structure of the rf device detection system of the present embodiment is substantially the same as that of the previous embodiment, and the description of the same parts is omitted. The present embodiment further includes a coupler 110, a ninth switch 29; the dynamic end of the first switch 21 is connected with the input end of the coupler 110, and the first output end of the coupler 110 is connected with the tested radio frequency device 104; the second output terminal of the coupler 110 is connected to the moving terminal of the ninth switch 29, the first stationary terminal of the ninth switch 29 is connected to the resistor 111, and the second stationary terminal of the ninth switch 29 is connected to the fourth stationary terminal of the sixth switch 26.

Specifically, when the rf device under test 104 is tested by the signal generator 102 and the measurement module 103, the power of the test signal input to the rf device under test 104 is high, and the size of the test signal can seriously affect the detection of the performance parameter of the rf device under test 104, so that the test signal of the rf device under test 104 needs to be detected. In order to accurately record the magnitude of the test signal input to the tested radio frequency device 104, the sixth switch 26 and the ninth switch 29 need to be switched and connected to the coupler 110, and the measurement module 103 can directly obtain the test signal input to the tested radio frequency device 104 through the coupler 110, so as to detect the magnitude of the test signal; after that, the sixth switch 26 is switched to the third branch or the fourth branch, and the ninth switch 29 is switched to the resistor 111, so that the measurement module 103 can receive the corresponding feedback signal, and the test module can analyze according to the acquired test signal and feedback signal, thereby obtaining a corresponding analysis result; the ninth switch 29 is switched to the resistor 111, and the signal transmitted by the coupler 110 can be consumed by the resistor 111, so that the process of detecting the signal transmitted by the coupler 110 is avoided.

In one embodiment, the measurement module comprises a spectrum analyzer, a communication tester; as shown in fig. 9, the measurement module 103 of the present embodiment includes a spectrum analyzer 1031 and a communication tester 1032; the input of the spectrum analyzer 1031 and the input of the communication tester 1032 are used together as the input of the measurement module 103.

Specifically, the signal generator 102 may transmit a single tone signal or a modulated signal, such as a CW wave or an LTE modulated wave, with different frequencies and different powers according to different detection requirements. The signal generator 102 is used for measuring the single-tone signal fed back by the tested radio frequency device 104 through the spectrum analyzer when the signal generator 102 is used for emitting the single-tone signal, and the communication tester is used for measuring the modulated signal fed back by the tested radio frequency device 104 when the signal generator 102 is used for emitting the modulated signal.

In one embodiment, the devices in the system other than the network analyzer 101, the signal generator 102, and the measurement module 103 are all disposed on a chip. By arranging the devices except the network analyzer 101, the signal generator 102 and the measuring module 103 on the chip, the detection system is integrated in one chip, the size of the chip is controllable, and the whole detection system is also convenient to manufacture.

An embodiment of the present embodiment relates to a radio frequency device detection system, which is substantially the same as the previous embodiment, and is mainly different in that an output end of a signal generator of the present embodiment is connected with a first switch through a first branch and a second branch, and an input end of a measurement module is connected with a second switch through a third branch, a fourth branch and a fifth branch, respectively.

The same or corresponding parts as those of the previous embodiment are still valid in this embodiment, and are not repeated here. The relevant implementation details of the above embodiment may be directly applied to the present embodiment, and accordingly, the relevant implementation details of the present embodiment may also be applied to the above embodiment.

As shown in fig. 10, a schematic circuit structure of the rf device detection system of the present embodiment includes: the network analyzer 101, the signal generator 102, the measurement module 103, the coupler 110, the resistor 111, the first switch 21, the second switch 22, the third switch 23, the sixth switch 26, and the ninth switch 29.

Specifically, the input end of the tested radio frequency device 104 is connected with the moving end of the first switch 21 through the coupler 110, and the output end of the tested radio frequency device 104 is connected with the moving end of the second switch 22; the first switch 21 comprises three fixed ends, the first fixed end of the first switch 21 is connected with the output end of the network analyzer 101, the second fixed end of the first switch 21 is connected with the first fixed end of the third switch 23 through a first branch, the third fixed end of the first switch 21 is connected with the second fixed end of the third switch 23 through a second branch, and the movable end of the third switch 23 is connected with the signal generator 102; the second switch 22 comprises four stationary ends, the first stationary end of the second switch 22 is connected with the input end of the network analyzer 101, the second stationary end of the second switch 22 is connected with the first stationary end of the sixth switch 26 through a third branch, the third stationary end of the second switch 22 is connected with the second stationary end of the sixth switch 26 through a fourth branch, and the fourth stationary end of the second switch 22 is connected with the third stationary end of the sixth switch 26 through a fifth branch; the second output terminal of the coupler 110 is connected to the moving terminal of the ninth switch 29, the first fixed terminal of the ninth switch 29 is connected to the resistor 111, and the second fixed terminal of the ninth switch 29 is connected to the fourth fixed terminal of the sixth switch 26.

Wherein, all Switch modules are single pole multi-throw switches, and can be provided by Switch switches.

Specifically, the network analyzer 101 needs to perform dual-port calibration before sending out the test signal, so the power of the test signal sent out by the network analyzer 101 is small, and the size of the test signal does not affect the detection of the performance parameter of the tested rf device 104, so it is not necessary to detect the size of the test signal input to the tested rf device 104, and the coupler 110 is connected to the resistor 111 through the first inactive end of the ninth switch 29.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments in which the present application is implemented and that various changes in form and details may be made therein without departing from the spirit and scope of the present application.

Claims

1. A radio frequency device detection system, comprising: the system comprises a network analyzer, a signal generator, a measuring module, a first switch and a second switch;

the input end of the tested radio frequency device is respectively connected with the output end of the network analyzer and the output end of the signal generator through the first switch; the output end of the tested radio frequency device is respectively connected with the input end of the network analyzer and the input end of the measuring module through the second switch;

the output end of the signal generator is connected with the first switch through a first branch and a second branch respectively; the first switch is used for switching connection among the output end of the network analyzer, the first branch and the second branch;

the first branch is as follows: the output end of the signal generator is connected with the first switch;

the second branch comprises an amplifying module and a first filtering module, wherein the input end of the amplifying module is connected with the output end of the signal generator, the output end of the amplifying module is connected with the input end of the first filtering module, and the output end of the first filtering module is connected with the first switch;

the input end of the measuring module is connected with the second switch through a third branch, a fourth branch and a fifth branch respectively; the second switch is used for switching connection among the input end of the network analyzer, the third branch, the fourth branch and the fifth branch;

the third branch is as follows: the input end of the measuring module is connected with the second switch;

the fourth branch comprises a first attenuator, the input end of the first attenuator is connected with the second switch, and the output end of the first attenuator is connected with the input end of the measuring module;

the fifth branch circuit comprises a second attenuator and a second filtering module, wherein the input end of the second attenuator is connected with the second switch, the output end of the second attenuator is connected with the input end of the second filtering module, and the output end of the second filtering module is connected with the input end of the measuring module.

2. The radio frequency device detection system of claim 1, further comprising a third switch; the output end of the signal generator is connected with the first switch through a first branch and a second branch respectively, and specifically comprises:

the output end of the signal generator is connected with the moving end of the third switch, the first fixed end of the third switch is connected with the first switch through the first branch, and the second fixed end of the third switch is connected with the first switch through the second branch.

3. The system of claim 1, wherein the first filter module comprises N low pass filters of different specifications, a fourth switch, a fifth switch; the fourth switch and the fifth switch respectively comprise N motionless ends;

the active end of the fourth switch is connected with the output end of the amplifying module, the N inactive ends of the fourth switch are respectively connected with the N input ends of the low-pass filter, the N output ends of the low-pass filter are respectively connected with the N inactive ends of the fifth switch, and the active end of the fifth switch is connected with the second switch.

4. The radio frequency device detection system of claim 1, further comprising a sixth switch; the input end of the measuring module is connected with the second switch through a third branch, a fourth branch and a fifth branch respectively, and specifically comprises:

the input end of the measuring module is connected with the movable end of the sixth switch, the first fixed end of the sixth switch is connected with the second switch through the third branch, the second fixed end of the sixth switch is connected with the second switch through the fourth branch, and the third fixed end of the sixth switch is connected with the second switch through the fifth branch.

5. The rf device detection system of claim 1, wherein the second filtering module includes M high pass filters of different specifications, a seventh switch, an eighth switch; the seventh switch and the eighth switch respectively comprise M motionless ends;

the movable end of the seventh switch is connected with the output end of the second attenuator, the M fixed ends of the seventh switch are respectively connected with the input ends of the M high-pass filters, the M fixed ends of the eighth switch are respectively connected with the output ends of the M high-pass filters, and the movable end of the eighth switch is connected with the input end of the measurement module.

6. The rf device detection system of claim 4, further comprising a coupler, a ninth switch; the movable end of the first switch is connected with the input end of the tested radio frequency device, and specifically comprises:

the dynamic end of the first switch is connected with the input end of the coupler, and the first output end of the coupler is connected with the tested radio frequency device;

the second output end of the coupler is also connected to the moving end of the ninth switch, the first fixed end of the ninth switch is connected with a resistor, and the second fixed end of the ninth switch is connected with the fourth fixed end of the sixth switch.

7. The radio frequency device detection system of claim 1, wherein the measurement module comprises a spectrum analyzer, a communication tester;

the input end of the spectrum analyzer and the input end of the communication tester are used as the input end of the measurement module together.

8. The radio frequency device detection system according to any one of claims 1 to 7, wherein devices in the system other than the network analyzer, the signal generator, and the measurement module are all provided on a chip.