CN114839508A

CN114839508A - Radio frequency detection system and detection method

Info

Publication number: CN114839508A
Application number: CN202210472871.8A
Authority: CN
Inventors: 何文卿
Original assignee: Shanghai Wingtech Information Technology Co Ltd
Current assignee: Shanghai Wingtech Information Technology Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-02

Abstract

The invention discloses a radio frequency detection system and a detection method. The main board is provided with a radio frequency signal circuit, and the radio frequency signal circuit is provided with a test part and an antenna feed point. The comprehensive tester is electrically connected with the testing part to realize the purpose of detecting the radio-frequency signals on the radio-frequency signal circuit. The first test head is provided with a first end, a second end and a grounding part, the first end is used for being electrically connected with the antenna feed point, the second end and/or the grounding part is used for being grounded, and the distance from the grounding part to the first position is different from the distance from the second position to the first position. The first position refers to a position of the first end for electrically connecting with the antenna feed point, and the second position refers to a position of the second end for grounding. The radio frequency detection system and the detection method provided by the invention can accurately detect the multi-frequency radio frequency signal so as to realize the calibration of the radio frequency signal of the electronic equipment.

Description

Radio frequency detection system and detection method

Technical Field

The invention relates to the technical field of electronic equipment testing, in particular to a radio frequency detection system and a detection method.

Background

In order to enable radio frequency signals (such as WIFI, GPS, antennas and the like) sent by the electronic equipment to meet the design requirements of the electronic equipment, the radio frequency signals sent by the electronic equipment need to be detected, and the radio frequency signals sent by the electronic equipment need to be calibrated according to the detection result. However, when the rf signal transmitted by the electronic device is a multi-frequency rf signal, there is no effective means to detect the multi-frequency rf signal, which affects the calibration of the rf signal of the electronic device.

Disclosure of Invention

The embodiment of the invention discloses a radio frequency detection system and a detection method, which can accurately detect multi-frequency radio frequency signals so as to realize the calibration of the radio frequency signals of electronic equipment.

In order to achieve the above object, in a first aspect, the present invention discloses a radio frequency detection system, including:

the main board is provided with a radio frequency signal circuit, the radio frequency signal circuit is provided with a testing part and an antenna feed point, and the antenna feed point is used for connecting an antenna;

the comprehensive tester is connected with the testing part and is used for detecting the radio-frequency signals on the radio-frequency signal circuit; and

the first test head is provided with a grounding part, the first test head is provided with a first end and a second end which are opposite, the first end is used for being electrically connected with the antenna feed point, and the second end and/or the grounding part is used for grounding;

the position of the first end, which is used for being electrically connected with the antenna feed point, is a first position, the position of the second end, which is used for being grounded, is a second position, and the distance from the grounding part to the first position is different from the distance from the second position to the first position along the direction from the first end to the second end.

As an alternative, in an embodiment of the present invention, the grounding portion is located between an end surface of the second end and an end surface of the first end.

In an alternative embodiment, in an embodiment of the present invention, the grounding portions include a plurality of grounding portions, and the plurality of grounding portions are spaced apart from each other in a direction from the first end to the second end.

As an optional implementation manner, in an embodiment of the present invention, the grounding portion is slidably disposed on the first test head to change a distance from the grounding portion to the first position.

As an alternative, in an embodiment of the invention, the first position is arranged on an end face of the first end, and/or the second position is arranged on an end face of the second end.

As an optional implementation manner, in an embodiment of the present invention, the first test head is further provided with an electrical connection portion, the electrical connection portion is located between the grounding portion and the first position, and the electrical connection portion is used for connecting with a grounding point of the antenna.

As an alternative implementation, in an embodiment of the present invention, the first test head includes a first test conductor and a second test conductor movably disposed on an outer periphery of the first test conductor, the first test conductor includes the first end and the second end, the electrical connection portion is disposed on the first test conductor, and the second test conductor is configured to form a separable electrical connection with the electrical connection portion.

As an optional implementation manner, in an embodiment of the present invention, the radio frequency detection system further includes a second test head, and the integrated tester is electrically connected to the test portion through the second test head.

As an optional implementation manner, in an embodiment of the present invention, the second test head includes a third test conductor and a fourth test conductor, the third test conductor electrically connects the test portion and the comprehensive tester, the fourth test conductor is in insulated connection with the third test conductor, and the fourth test conductor is used for grounding, and the comprehensive tester is further electrically connected with the fourth test conductor.

As an optional implementation manner, in an embodiment of the present invention, the radio frequency detection system satisfies the following relation:

L ₁ +L ₂ ＝(0.175～0.325)λ

wherein L is ₁ Is the distance, L, between the test section and the antenna feed point ₂ λ is a wavelength of a target radio frequency signal, which is a distance between the antenna feeding point and the grounding portion or the second end.

In a second aspect, the present invention further discloses a detection method for the radio frequency detection system based on the first aspect, wherein the detection method includes:

electrically connecting the radio frequency comprehensive tester to the test part to detect the radio frequency signal on the radio frequency signal circuit;

electrically connecting the first end of the first test head to the antenna feed point, and grounding the second end of the first test head and/or the ground.

Compared with the prior art, the invention has the beneficial effects that:

the embodiment of the invention provides a radio frequency detection system and a detection method, the radio frequency detection system is provided with a comprehensive tester, the comprehensive tester is electrically connected with a test part on a radio frequency signal line, the radio frequency detection system is also provided with a first test head, and the first test head is provided with a second end and a grounding part for grounding, so that when the second end and/or the grounding part are grounded, a radio frequency signal line between the test part and an antenna feed point is an open circuit, and further when a radio frequency signal of a mainboard of electronic equipment is detected, the radio frequency signal on the radio frequency signal line between the test part and the antenna feed point and the radio frequency signal on the antenna feed point can be reduced to influence on a detection result of the comprehensive tester, and the detection accuracy of the radio frequency signal is ensured. When detecting radio-frequency signals of different frequency bands, in order to ensure the detection accuracy, the distance between the antenna feed point and the grounding position needs to be controlled according to the wavelength of the radio-frequency signals, so that the grounding part and the second end are arranged for grounding, and the distances from the grounding part and the second end to the antenna feed point are limited to be different, so that when detecting the radio-frequency signals of different frequency bands, the grounding part or the second end can be grounded to adjust the distance between the antenna feed point and the grounding position, so that the detection of the radio-frequency signals of different frequency bands is adapted, and further the multi-frequency radio-frequency signals can be accurately detected, so that the aim of calibrating the radio-frequency signals of the electronic equipment is fulfilled.

Drawings

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

FIG. 1 is a schematic structural diagram of a radio frequency detection system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of another structure of the RF detection system according to the embodiment of the present invention;

FIG. 3 is an exploded view of a first test head of the RF detection system according to the present invention;

FIG. 4 is an exploded view of a second test head of the RF detection system according to the embodiment of the present invention;

fig. 5 is a flowchart of a detection method of a radio frequency detection system according to an embodiment of the present invention.

Description of the main reference numerals: 10. a radio frequency detection system; 11. a main board; 12. a comprehensive measuring instrument; 13. a first test head; 131. a ground part; 1311. a first ground part; 1312. a second ground part; 132. a first end; 133. a second end; 134. an electric connection part; 135. a first test conductor; 136. a second test conductor; 137. a first accommodating cavity; 14. a radio frequency signal line; 15. a test section; 151. a first test section; 152. a second testing section; 16. an antenna feed point; 17. a chute; 18. a second test head; 181. a third test conductor; 182. a fourth test conductor; 183. a second accommodating cavity; 19. and a radio frequency matching network.

Detailed Description

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

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Referring to fig. 1 and 2, the present application discloses a radio frequency detection system, which includes a main board 11, a comprehensive tester 12, and a first test head 13. The main board 11 is a main board 11 disposed in the electronic device, the main board 11 is provided with a radio frequency signal line 14, and the radio frequency signal line 14 is provided with a testing portion 15 and an antenna feeding point 16 for connecting an antenna. The integrated tester 12 is a device for detecting rf signals, and is connected to the testing portion 15 for detecting rf signals on the rf signal line 14. The first test head 13 is provided with a ground portion 131, and the first test head 13 has a first end 132 and a second end 133 opposite to each other, the first end 132 is used for electrically connecting with the antenna feeding point 16, and the second end 133 and/or the ground portion 131 is used for grounding. That is, the second end 133 is used for grounding, or the grounding portion 131 is used for grounding, or both the second end 133 and the grounding portion 131 are used for grounding.

Specifically, the position of the first end 132 for electrically connecting to the antenna feeding point 16 is a first position, the position of the second end 133 for grounding is a second position, and the distance from the grounding portion 131 to the first position is different from the distance from the second position to the first position along the direction from the first end 132 to the second end 133, so that the distances from the grounding portion and the position from the second end for grounding to the antenna feeding point are different.

Wherein the first end 132 has a first end surface, the second end 133 has a second end surface, and the first end 132 can be electrically connected to the antenna feeding point 16 through the first end surface or other positions (for example, the outer circumferential surface of the first test head 13) except the first end surface, so that when the first end 132 is electrically connected to the antenna feeding point 16 through the first end surface, the first position can be any position on the first end surface; while first end 132 is electrically connected to antenna feed point 16 through a location other than the first end (e.g., the outer circumferential surface of first test head 13), the first location may be any location on a location other than the first end (e.g., the outer circumferential surface of first test head 13). Second end 133 may be grounded through the second end face or other locations (e.g., the outer peripheral surface of first test head 13) other than the second end face, and when second end 133 is grounded through the second end face, the second location may be any location on the second end face; while the second end 133 is grounded through a position other than the second end (e.g., the outer peripheral surface of the first test head 13), the second position may be any position on a position other than the second end (e.g., the outer peripheral surface of the first test head 13).

That is to say, the rf detection system 10 is provided with the integrated tester 12, and the integrated tester 12 is electrically connected to the test portion 15 on the rf signal line 14, the rf detection system 10 is further provided with the first test head 13, and the first test head 13 is provided with the second end 133 and the ground portion 131 for grounding, so that when the second end 133 and/or the ground portion 131 is grounded, the rf signal line 14 between the test portion 15 and the antenna feeding point 16 is open, and further when detecting the rf signal of the motherboard 11 of the electronic device, the rf signal on the rf signal line 14 between the test portion 15 and the antenna feeding point 16 and the rf signal on the antenna feeding point 16 can be reduced from affecting the detection result of the integrated tester 12, so as to ensure the detection accuracy of the rf signal. When detecting radio frequency signals of different frequency bands, in order to ensure the detection accuracy, the distance between the antenna feeding point 16 and the grounding position (i.e., the second end 133 or the grounding portion 131) needs to be controlled according to the wavelength of the radio frequency signal, so that the grounding portion 131 and the second end 133 are set for grounding, and the distances from the grounding portion 131 and the second end 133 to the antenna feeding point 16 are defined to be different, so that when detecting radio frequency signals of different frequency bands, the grounding portion 131 or the second end 133 can be adopted for grounding to adjust the distance between the antenna feeding point 16 and the grounding position, thereby adapting to the detection of the radio frequency signals of different frequency bands, further accurately detecting the multi-frequency radio frequency signals, and achieving the purpose of calibrating the radio frequency signals of the electronic device.

In addition, by adopting the radio frequency detection system 10 provided by the embodiment, the detection accuracy of the multi-frequency radio frequency signal can be ensured without welding the test seat at the test part 15, the waste of materials of the test seat can be reduced, and the reduction of the detection cost of the multi-frequency radio frequency signal is facilitated.

It is noted that the first end 132 may be electrically connected to the antenna feed point 16 by a conductive wire connecting the first end 132 to the antenna feed point 16, or by the first end 132 being in direct contact with the antenna feed point 16. To facilitate electrical connection between the first end 132 and the antenna feed point 16, the present embodiment preferably employs a manner in which the first end 132 is in direct contact with the antenna feed point 16.

Further, the first position may be disposed on the first end surface of the first end 132, i.e., the position where the first end 132 is electrically connected with the antenna feeding point 16 may be disposed on the first end surface of the first end 132. In this way, when the electrical connection is achieved by the first end 132 being in direct contact with the antenna feeding point 16, it is advantageous to facilitate the direct contact between the first end 132 of the first test head 13 and the antenna feeding point 16 and to improve the connection stability between the first end 132 and the antenna feeding point 16.

Similarly, the second position may also be disposed on the second end surface of the second end 133, that is, the position of the second end 133 for grounding is disposed on the second end surface of the second end 133, so that when the inspector directly electrically connects the ground wire to the second end surface of the second end 133, the purpose of grounding the second end 133 can be achieved, so as to achieve the purpose of grounding the second end 133.

In some embodiments, the rf detection system 10 satisfies the following relationship: l is a radical of an alcohol ₁ +L ₂ λ (0.175 to 0.325). Wherein L is ₁ Distance between the test portion 15 and the antenna feed point 16, L ₂ λ is the wavelength of the target rf signal, i.e. the wavelength of the target rf signal transmitted on the rf signal line 14, which is the distance between the antenna feeding point 16 and the ground 131 or the distance between the antenna feeding point 16 and the second position.

It will be appreciated that L is the second position grounded and the ground 131 is not grounded ₂ Is the distance between the antenna feed point 16 and the second location; l when the second position is not grounded and the grounding part 131 is grounded ₂ The distance between the antenna feeding point 16 and the grounding part 131; l when both the second position and the ground 131 are grounded ₂ The smaller of the distance between the antenna feeding point 16 and the second position and the distance between the antenna feeding point 16 and the ground 131.

When the radio frequency detection system 10 satisfies the above relational expression, the influence of the radio frequency signal on the radio frequency signal line 14 between the test portion 15 and the antenna feeding point 16 and the radio frequency signal on the antenna feeding point 16 on the detection result of the integrated instrument 12 can be reduced to the maximum extent, which is beneficial to improving the detection accuracy of the integrated instrument 12 on the radio frequency signal. If the sum of the distance between the test portion 15 and the antenna feeding point 16 and the distance between the antenna feeding point 16 and the ground portion 131, or the sum of the distance between the test portion 15 and the antenna feeding point 16 and the distance between the antenna feeding point 16 and the second position does not satisfy the above-mentioned relation, the impedance on the rf signal line 14 between the test portion 15 and the antenna feeding point 16 is greatly different from the impedance of the integrated meter 12, which may cause the problem that the detection data of the integrated meter 12 is inaccurate.

In some embodiments, the grounding portion 131 may be located between the second end surface of the second end 133 and the first end surface of the first end 132, which can increase the position where the grounding portion 131 can be disposed, and is beneficial to increasing the number of the grounding portions 131 disposed on the first test head 13.

Specifically, the grounding portion 131 may be a probe, a wire, or the like, which may be determined according to actual situations as long as the grounding portion 131 can be used for grounding, and the present embodiment is not particularly limited.

The structure of the rf detection system 10 will be described below by taking an example in which the first position is disposed on the first end surface of the first end 132, the second position is disposed on the second end surface of the second end 133, and the grounding portion 131 is located between the second end surface of the second end 133 and the first end surface of the first end 132.

As an alternative embodiment, as shown in fig. 1, the number of the grounding portions 131 may be one or more, for example, the number of the grounding portions 131 may be one, two, three, four or more, and may be determined according to the frequency of the multi-frequency rf signal. That is, the number of the grounding parts 131 is one less than the frequency of the rf signal. When the number of the ground portions 131 is plural, the plural ground portions 131 are disposed at intervals in a direction along the first end 132 to the second end 133. Therefore, the detecting personnel can select the corresponding grounding part 131 to be grounded according to the frequency band of the radio frequency signal to be detected. The frequency of the multi-frequency rf signal refers to a total number of rf signals with different frequencies in the multi-frequency rf signal, for example, the frequency of the tri-frequency rf signal is three.

Exemplarily, when the multi-frequency rf signal is a tri-frequency rf signal, the tri-frequency rf signal is a low-band rf signal, a middle-band rf signal, and a high-band rf signal, the number of the ground portions 131 is two, the two ground portions 131 are a first ground portion 1311 and a second ground portion 1312, the first ground portion 1311 and the second ground portion 1312 are disposed between the first end 132 and the second end 133 at an interval, and the first ground portion 1311 is disposed between the second ground portion 1312 and the first end 132. That is, the positions on the first test head 13 that can be grounded along the direction from the first end 132 to the second end 133 are the first ground portion 1311, the second ground portion 1312, and the second end 133, respectively. Thus, when the second terminal 133 is grounded, the rf detection system 10 is used for detecting rf signals in a low frequency band; when the second grounding portion 1312 is grounded, the rf detection system 10 is configured to detect an rf signal in a middle frequency band; when the first grounding portion 1311 is grounded, the rf detection system 10 is configured to detect an rf signal in a high frequency band.

It should be noted that only one of the first ground portion 1311, the second ground portion 1312 and the second end 133 may be grounded, any two of them may be grounded, or three of them may be grounded at the same time. When any two or three of the two or three are grounded, the rf detection system 10 can only be used to detect rf signals of a corresponding frequency band detected at a grounding position closest to the first end 132. For example, when the first grounding portion 1311 and the second grounding portion 1312 are grounded simultaneously, the rf detection system 10 can only be used for detecting rf signals in a high frequency band.

As another alternative, as shown in fig. 2, the grounding portion 131 may be slidably disposed on the first test head 13, that is, the grounding portion 131 may be slidable relative to the first end 132 to change the distance from the grounding portion 131 to the first position. Specifically, the first test head 13 is provided with a sliding slot 17, and the grounding portion 131 is slidably disposed in the sliding slot 17, so that the grounding portion 131 can slide in the sliding slot 17 relative to the first end 132, and further the distance between the antenna feeding point 16 and the grounding portion 131 is changed, so that the rf detection system 10 can be applied to rf signal detection of different frequency bands. For example, during the rf signal detection process, the grounding portion 131 may be grounded, and when the low-frequency rf signal is detected, the grounding portion 131 may be slid to a third position, so that the sum of the distance between the test portion 15 and the antenna feeding point 16 and the distance between the antenna feeding point 16 and the grounding portion 131 is 0.175-0.325 times the wavelength of the low-frequency rf signal; when detecting the mid-band rf signal, the grounding portion 131 may be slid to a fourth position, so that the sum of the distance between the testing portion 15 and the antenna feeding point 16 and the distance between the antenna feeding point 16 and the grounding portion 131 is 0.175-0.325 times the wavelength of the mid-band rf signal. That is, the grounding portion 131 is disposed in the sliding slot 17, so that the rf detection system 10 can be used for detecting rf signals in multiple frequency bands, which is beneficial to improving the flexibility of the rf detection system 10. In addition, the grounding part 131 is arranged in this way, so that the purpose of detecting radio frequency signals of various frequency bands can be realized only by using one grounding part 131, and the cost of the radio frequency detection system 10 is favorably reduced.

In both of the above two embodiments, the rf detection system 10 can be used to detect multi-frequency rf signals such as three-frequency rf signals, four-frequency rf signals, or five-frequency rf signals, or used to detect multi-frequency rf signals on the motherboard 11 of different electronic devices.

In some embodiments, first test head 13 is further provided with an electrical connection 134, the electrical connection 134 being located between ground 131 and the first location, the electrical connection 134 being for connection to a ground point of an antenna. The first test head 13 is further provided with a connection part 134 mainly because the antenna electrically connected to the antenna feeding point 16 is usually provided with a grounding point, during the rf signal detection process, part of the rf signal transmitted to the antenna feeding point 16 is transmitted to the first test head 13, and the rest is transmitted to the antenna. As can be seen from the foregoing, by controlling the sum of the distance from the test portion 15 to the antenna feeding point 16 and the distance from the antenna feeding point 16 to the grounding position (i.e., the grounding portion 131 or the second position) of the first test head 13 to be 0.175 to 0.325 times the wavelength of the target rf signal, the influence of the rf signal on the rf signal line 14 between the test portion 15 and the antenna feeding point 16 and the rf signal on the antenna feeding point 16 on the detection result of the integrated tester 12 can be greatly reduced. If the power connection part 134 is not provided, since the distance between the testing part 15 and the grounding point of the antenna is determined according to the design requirement of the electronic device, it cannot be ensured that the distance between the testing part 15 and the grounding point of the antenna is 0.175-0.325 times the wavelength of the target rf signal, and when the distance between the testing part 15 and the grounding point of the antenna is not within the above range, the rf signal on the antenna will have a large influence on the detection result of the integrated tester 12, so that the detection accuracy of the rf signal is low. Therefore, by providing the connection part 134 and electrically connecting the ground point of the antenna with the connection part 134, the rf signal on the antenna can be transmitted to the first test head 13 through the connection part 134, so that the rf signal on the antenna can be transmitted to the first test head 13, and all the rf signal transmitted to the antenna feed point 16 is transmitted to the first test head 13. Thus, the purpose of improving the detection accuracy of the radio frequency detection system 10 can be achieved by considering that the sum of the distance from the test part 15 to the antenna feed point 16 and the distance from the antenna feed point 16 to the grounding position of the first test head 13 is 0.175-0.325 times of the wavelength of the target radio frequency signal.

Referring to fig. 3, in some embodiments, first test head 13 includes a first test conductor 135 and a second test conductor 136 movably disposed about the periphery of first test conductor 135. The first test conductor 135 includes the first end 132 and the second end 133, and the connecting portion 134 and the grounding portion 131 are disposed on the first test conductor 135, and the second test conductor 136 can be electrically connected to the connecting portion 134 when the rf detecting system 10 is in the detecting state. Specifically, the first test conductor 135 is used for transmitting the rf signal transmitted from the antenna feeding point 16 to the first test head 13, and the antenna feeding point 16 is grounded by the grounding portion 131 or the grounding at the second position, and the chute 17 is disposed on the second test conductor 136. When the rf detecting system 10 is in the detecting state, the second testing conductor 136 is electrically connected to the connecting portion 134, so that the second testing conductor 136 can be electrically connected to the first testing conductor 135 through the connecting portion 134, and the second testing conductor 136 can be grounded through the grounding portion 131 or the second position on the first testing conductor 135. The reason for this design is mainly because when the rf signal is transmitted on the first test conductor 135, the rf signal on the first test conductor 135 will radiate into the air, and the second test conductor 136 grounded is disposed on the outer periphery of the first test conductor 135, and the second test conductor 136 can receive the rf signal radiated from the first test conductor 135 and send the received rf signal back to the first test conductor 135 through the electrical connection part 134, so as to avoid the influence on the detection accuracy of the integrated tester 12 caused by the radiation of the rf signal on the first test conductor 135 into the air. That is, the second test conductor 136 is disposed, and the second test conductor 136 is grounded through the power connection portion 134, which is beneficial to improving the detection accuracy of the rf detection system 10.

Alternatively, first test conductor 135 and second test conductor 136 may each be a columnar structure, such as a cylinder or prism. The first test conductor 135 and the second test conductor 136 are both cylindrical as illustrated below (see in particular fig. 3):

when the first test conductor 135 and the second test conductor 136 are both cylindrical, in some embodiments, a first receiving cavity 137 is disposed in the second test conductor 136, the first test conductor 135 is disposed in the first receiving cavity 137, and the first test conductor 135 is at least partially disposed outside the first receiving cavity 137. It can be understood that, the first test conductor 135 is disposed in the first receiving cavity 137, and thus the second test conductor 136, which is grounded, is disposed at the periphery of the first test conductor 135 disposed in the first receiving cavity 137, so that the detection effect of the first test conductor 135 on the radio frequency signal can be improved. In addition, the first testing conductor 135 is partially disposed outside the first receiving cavity 137, so that the first position of the first end 132 for electrically connecting with the antenna feeding point 16 can be disposed outside the first receiving cavity 137, and the second testing conductor 136 is prevented from shielding the first position, thereby facilitating the electrical connection between the first position and the antenna feeding point 16.

Alternatively, the electrical connection portion 134 may be disposed on a portion of the first test conductor 135 outside the first receiving cavity 137, or on a portion of the first test conductor 135 within the first receiving cavity 137, as long as it is ensured that the second test conductor 136 can be electrically connected to the electrical connection portion 134 and the ground point of the antenna can be electrically connected to the electrical connection portion 134. In this embodiment, the electric connection part 134 is preferably disposed at a portion of the first test conductor 135 located outside the first receiving cavity 137, so that the electric connection part 134 can be exposed outside the first receiving cavity 137, and an operation space when the ground point of the antenna is connected with the electric connection part 134 is relatively large, which is beneficial to the electric connection between the ground point of the antenna and the electric connection part 134.

As can be seen from the foregoing, when the rf detection system 10 is in the detection state, the second test conductor 136 is electrically connected to the electrical connection portion 134. Alternatively, the second test conductor 136 is inseparably electrically connected to the electrical connection portion 134 or detachably electrically connected to the electrical connection portion 134.

Specifically, inseparably electrically connecting second test conductor 136 to electrical connection 134 means: with the rf detection system 10 in the detection state and the non-detection state, the second test conductor 136 is always electrically connected to the power connection portion 134. The second test conductor 136 is detachably electrically connected to the electrical connection 134 by: in the non-detection state of the rf detection system 10, the second test conductor 136 is not electrically connected to the power connection portion 134; the second test conductor 136 is electrically connected to the electrical connection 134 when the rf detection system 10 is in the detection state. Since the second test conductor 136 is inseparably electrically connected to the electrical connection part 134, the second test conductor 136 is always electrically connected to the electrical connection part 134, and the second test conductor 136 may shield part of the electrical connection part 134, thereby reducing the connection space between the ground point of the antenna and the electrical connection part 134, and being unfavorable for electrical connection between the ground point of the antenna and the electrical connection part 134. Therefore, the present embodiment preferably provides for the second test conductor 136 to be detachably electrically connected to the electrical connection portion 134.

In some embodiments, when the second test conductor 136 is electrically connected to the electrical connection portion 134 in a detachable manner, the electrical connection portion 134 can be disposed on a portion of the first test conductor 135 outside the first receiving cavity 137, and the first test conductor 135 is provided with a first spring for driving the second test conductor 136 to move relative to the electrical connection portion 134. That is, when the rf detection system 10 is in the non-detection state, the first spring is in the original state and the second test conductor 136 is separated from the power connection portion 134. When the rf signal detection system 10 is used to detect an rf signal, a force toward the power connection portion 134 may be applied to the second test conductor 136, such that the first spring is compressed by the force, and the second test conductor 136 is driven to move toward the power connection portion 134 until the second test conductor 136 is electrically connected to the power connection portion 134. When the rf detection system 10 finishes detecting, the first spring returns to its original state by stopping applying a force to the second test conductor 136, so as to drive the second test conductor 136 to return to its original state.

Because the contact end of the integrated tester 12 electrically connected to the testing part 15 may be a clip or a screw, if the contact end of the integrated tester 12 is directly electrically connected to the testing part 15, the connection between the integrated tester 12 and the testing part 15 is not tight, which results in poor connection stability between the integrated tester 12 and the testing part 15, and further affects the detection of the integrated tester 12 on the radio frequency signal. Therefore, in some embodiments, the rf detection system 10 further includes a second test head 18, and the integrated tester 12 is electrically connected to the test section 15 through the second test head 18. This is favorable to improving the stability of connection between the integrated tester 12 and the test section 15, thereby ensuring the detection of the integrated tester 12 on the radio frequency signal.

Further, the second test head 18 includes a third test conductor 181 and a fourth test conductor 182, the third test conductor 181 is electrically connected to the test portion 15 and the integrated tester 12, so that the rf signal of the test portion 15 can be transmitted to the integrated tester 12 through the third test conductor 181, thereby implementing the purpose of detecting the rf signal. In particular, the fourth test conductor 182 is connected in an insulated manner to the third test conductor 181, and the fourth test conductor 182 serves for grounding. The reason for this design is mainly because when the rf signal is transmitted on the third test conductor 181, the rf signal on the third test conductor 181 is radiated to the air, and the grounded fourth test conductor 182 is disposed on the periphery of the third test conductor 181, and the fourth test conductor 182 can receive the rf signal radiated from the third test conductor 181, so as to avoid the influence on the detection accuracy of the integrated tester 12 caused by the radiation of the rf signal on the third test conductor 181 to the air. That is, by disposing the fourth test conductor 182 and grounding the fourth test conductor 182, the detection accuracy of the rf detection system 10 can be improved. In addition, the fourth test conductor 182 is connected to the third test conductor 181 in an insulated manner, so that the problem that the radio frequency signal cannot be transmitted to the integrated tester 12 for testing due to the electrical connection between the third test conductor 181 and the fourth test conductor 182 can be avoided.

Furthermore, the integrated tester 12 is electrically connected to the fourth test conductor 182, so that the purpose of grounding the integrated tester 12 can be achieved, and the accuracy of detecting the radio frequency signal by the integrated tester 12 can be improved.

For the purpose of grounding the integrated tester 12, in some embodiments, the testing part 15 includes a first testing part 151 and a second testing part 152, the first testing part 151 is disposed on the rf signal line 14, the second testing part 152 is disposed at the periphery of the first testing part 151 and grounded, and the second testing part 152 is connected to the first testing part 151 in an insulated manner. When detecting the radio frequency signal, the third test conductor 181 is electrically connected to the first test portion 151, so that the radio frequency signal on the radio frequency signal line 14 can be transmitted to the third test conductor 181 through the first test portion 151, and the radio frequency signal can be transmitted to the integrated tester 12 through the third test conductor 181 for measurement. In addition, when detecting the radio frequency signal, the fourth test conductor 182 is electrically connected to the second test portion 152, because the second test portion 152 is grounded, when the fourth test conductor 182 is electrically connected to the second test portion 152, the fourth test conductor 182 is also grounded, thereby improving the effect of transmitting the radio frequency signal along the third test conductor 181, preventing the radio frequency signal on the third test conductor 181 from being dispersed into the air, thereby affecting the detection accuracy of the integrated tester 12, and when the integrated tester 12 is electrically connected to the fourth test conductor 182, the integrated tester 12 can achieve the purpose of grounding. The first testing portion 151 is a conductive material on the rf signal line 14, and the second testing portion 152 is a ground layer of the motherboard 11.

Further, the number of the second testing portions 152 is two, and the two testing portions 15 may be disposed on two sides of the rf signal line 14 in an elliptical arc shape or an arc shape. The number of the second testing parts 152 may be determined according to actual conditions, as long as it is satisfied that the second testing parts 152 are insulated and disposed on the periphery of the first testing part 151.

Alternatively, the third test conductor 181 may be a columnar structure (see fig. 4 in particular), such as a cylindrical structure or a prismatic structure, and the fourth test conductor 182 may also be a columnar structure, such as a cylindrical structure or a prismatic structure. The third test conductor 181 and the fourth test conductor 182 are both cylindrical structures and will be described below.

In some embodiments, the fourth test conductor 182 defines a second receiving cavity 183, and the third test conductor 181 is at least partially disposed within the second receiving cavity 183 and at least partially disposed outside the second receiving cavity 183. The following will exemplify the case where the third test conductor 181 is at least partially located outside the second housing cavity 183:

in an exemplary embodiment, the contact surface of the third test conductor 181 and the first test part 151 and the contact surface of the fourth test conductor 182 and the second test part 152 are located on the same plane, so that when the third test conductor 181 is electrically connected to the first test part 151, the fourth test conductor 182 can be electrically connected to the second test part 152, which is beneficial to simplify the detection step of the radio frequency signal.

In another example, the contact surface of the third test conductor 181 and the first test portion 151 and the contact surface of the fourth test conductor 182 and the second test portion 152 are located on different planes, that is, the height of the third test conductor 181 is greater than the height of the fourth test conductor 182, and the third test conductor 181 is provided with a second spring, that is, when the third test conductor 181 is electrically connected to the first test portion 151, the fourth test conductor 182 cannot be electrically connected to the second test portion 152, and when a force is applied to the fourth test conductor 182 toward the second test portion 152, the second spring is compressed by the force, the fourth test conductor 182 moves toward the second test portion 152 to contact the second test portion 152, and then the purpose of grounding the fourth test conductor 182 is achieved. By arranging the second spring on the third test conductor 181, the radio frequency signal line 14 can be connected again when the radio frequency signal is tested, which is beneficial to improving the use safety of the radio frequency detection system 10.

In some embodiments, the rf detection system 10 further includes an rf matching network 19, the rf matching network 19 is connected in series between the test portion 15 and the antenna feeding point 16, and the rf matching network 19 is configured to adjust the rf signal of the antenna so that the rf signal of the antenna matches the design requirement of the electronic device. Specifically, the rf matching network 19 is actually a resistor connected in series between the test portion 15 and the antenna feed point 16.

Further, in order to make the detection accuracy of the radio frequency detection system 10 on the radio frequency signal on the motherboard 11 higher, the radio frequency matching network 19 preferably adopts a zero-ohm resistor, the inductance L of the zero-ohm resistor is 10nH or more and L or less than 6.2H, and the capacitance C of the zero-ohm resistor is 1pF or more and C or less than 5.6pF, which is beneficial to reducing the impedance on the radio frequency signal line 14 between the test part 15 and the antenna feed point 16 and improving the detection accuracy of the radio frequency detection system 10 on the radio frequency signal.

Referring to fig. 5, the present application further discloses a detection method of a radio frequency detection system, which is the above radio frequency detection system, and the detection method is adopted to detect radio frequency signals, so as to accurately detect multi-frequency radio frequency signals, and calibrate the radio frequency signals of the electronic device.

Specifically, the detection method comprises the following steps:

step 201: a test section is formed on the main board.

That is, the test portion is formed in the process of producing the main board of the electronic device, so that when the radio frequency signal is detected, the test portion does not need to be formed on the main board through extra steps, and the detection steps of the radio frequency signal are simplified.

Furthermore, the testing part comprises a first testing part and a second testing part, the first testing part is arranged on the radio frequency signal circuit, the second testing part is arranged on the periphery of the first testing part and is grounded, the second testing part is in insulation connection with the first testing part, if the first testing part and the second testing part are electrically connected, the comprehensive testing instrument cannot detect radio frequency signals, and even the transmission of the radio frequency signals on the mainboard can be influenced.

Specifically, the first testing portion is a conductive material on the radio frequency signal circuit, and the second testing portion is a grounding layer of the motherboard. That is to say, be equipped with radio frequency signal circuit and ground plane on the surface of electronic equipment's mainboard, when the mainboard of electronic equipment was produced, can be at the mainboard surface coating solder mask oil that is equipped with radio frequency signal circuit and ground plane to the condition that circuit on the mainboard takes place to open circuit is prevented in the realization. The method for forming the test portion on the motherboard according to the detection method provided by the embodiment includes: when the surface of mainboard scribbled solder mask oil, shield the position that first test section and second test section are located, prevent that solder mask oil from scribbling on first test section and second test section to make to synthesize the appearance and can be connected with first test section and second test section electricity.

It can be understood that, since the main board of the electronic device mostly adopts copper as the conductive material, the material of the first test portion and the second test portion is copper. Of course, if the transmission effect of the rf signal is desired to be improved, silver or gold may be plated on the surfaces of the first testing part and the second testing part, so as to improve the transmission effect of the rf signal.

Step 202: the comprehensive tester is electrically connected to the testing part.

In this step, the second test head may be electrically connected to the test portion, and then the integrated tester may be electrically connected to the second test head, or the second test head may be electrically connected to the integrated tester, and then the second test head may be electrically connected to the test portion. The detection habit of the detection personnel can be specifically selected, and the embodiment is not particularly limited as long as the comprehensive tester is ensured to be electrically connected with the test part to detect the radio frequency signal on the radio frequency signal circuit.

Step 203: the first end of the first test head is electrically connected to the antenna feed point, and the second end and/or the ground of the first test head is grounded.

For example, when a plurality of grounding portions are provided on the first test head, the grounding position of the first test head may be selected according to the wavelength of the target rf signal of the rf signal to be tested. For example, if the rf signal on the rf line is a two-frequency rf signal, which is a low-frequency rf signal and a middle-frequency rf signal, respectively, during the detection, the ground portion or the second end may be selected to be grounded according to the wavelengths of the low-frequency rf signal and the middle-frequency rf signal. For example:

when detecting the radio frequency signal of the intermediate frequency band, the grounding part can be selected to be grounded, so that the sum of the distance between the test part and the antenna feeding point and the distance between the antenna feeding point and the grounding part or the second end used for grounding is 0.175-0.325 times of the wavelength of the radio frequency signal of the target intermediate frequency band.

When detecting the low-band radio-frequency signal, the second end can be grounded, so that the sum of the distance from the test part to the antenna feed point and the distance from the antenna feed point to the grounding part for grounding or the second end is 0.175-0.325 times of the wavelength of the target low-band radio-frequency signal.

It should be noted that, when the grounding portion is selected to be grounded, the second end may also be grounded, which has no influence on the detection result of the comprehensive tester.

For another example, when the grounding part on the first test head is slidably disposed on the first test head, the grounding part may be grounded and the grounding part may be slid to a suitable position, so that the sum of the distance between the test part and the antenna feeding point and the distance between the antenna feeding point and the grounding part is 0.175-0.325 times the wavelength of the rf signal in the target frequency band. For example, assume that the rf signal on the rf line is a two-band rf signal, i.e., a low-band rf signal and a middle-band rf signal.

When the low-frequency band radio-frequency signal is detected, grounding the grounding part and sliding the grounding part to a third position, so that the sum of the distance between the test part and the antenna feeding point and the distance between the antenna feeding point and the grounding part is 0.175-0.325 times of the wavelength of the target low-frequency band radio-frequency signal.

When detecting the radio-frequency signal of the intermediate frequency band, grounding the grounding part and sliding the grounding part to a fourth position, so that the sum of the distance between the test part and the antenna feeding point and the distance between the antenna feeding point and the grounding part is 0.175-0.325 times of the wavelength of the radio-frequency signal of the target intermediate frequency band.

It is understood that step 202 may be performed first and then step 203 is performed, or step 203 may be performed first and then step 202 is performed, which may be determined according to the detection habit of the detection personnel, and this embodiment is not limited in particular.

Step 204: and reading the detection result of the comprehensive tester.

That is, the detection result of the rf signal measured by the integrated measuring instrument is read, and the detection result may be the power or wavelength of the rf signal. If the detection result shows that the detected radio frequency signal is the target radio frequency signal of the electronic equipment, the detection operation is ended; and if the detection result shows that the radio frequency signal is not the target radio frequency signal of the electronic equipment, calibrating the radio frequency signal according to the detection result, and then repeating the step 202 and the step 203 until the detected radio frequency signal on the mainboard is the target radio frequency signal of the electronic equipment.

The radio frequency detection system and the detection method disclosed by the embodiment of the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the radio frequency detection system and the detection method of the invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A radio frequency detection system, the radio frequency detection system comprising:

2. The radio frequency detection system according to claim 1, wherein the grounding portion is located between an end surface of the second end and an end surface of the first end.

3. The radio frequency detection system according to claim 2, wherein the grounding portion includes a plurality of grounding portions, and the plurality of grounding portions are spaced apart from each other along a direction from the first end to the second end.

4. The radio frequency detection system of claim 1, wherein the grounding portion is slidably disposed on the first test head to vary a distance from the grounding portion to the first position.

5. A radio frequency detection system according to claim 1, wherein the first position is disposed on an end face of the first end and/or the second position is disposed on an end face of the second end.

6. The radio frequency detection system of claim 1, wherein the first test head is further provided with an electrical connection portion, the electrical connection portion being located between the ground portion and the first location, the electrical connection portion being configured to connect to a ground point of the antenna.

7. The radio frequency detection system according to claim 6, wherein the first test head comprises a first test conductor and a second test conductor movably disposed on the periphery of the first test conductor, the first test conductor comprises the first end and the second end, the power connection portion is disposed on the first test conductor, and the second test conductor is used for forming a separable electrical connection with the power connection portion.

8. The radio frequency detection system according to any of claims 1 to 7, further comprising a second test head, wherein the integrated tester is electrically connected to the test portion through the second test head.

9. The radio frequency detection system according to claim 8, wherein the second test head includes a third test conductor and a fourth test conductor, the third test conductor electrically connects the test section and the integrated tester, the fourth test conductor is insulated from the third test conductor, the fourth test conductor is used for grounding, and the integrated tester is further electrically connected to the fourth test conductor.

10. A radio frequency detection system according to any of claims 1 to 7, wherein the radio frequency detection system satisfies the following relation:

L ₁ +L ₂ ＝(0.175～0.325)λ

wherein L is ₁ Is the distance, L, between the test section and the antenna feed point ₂ And lambda is the wavelength of the target radio frequency signal and is the distance between the antenna feed point and the grounding part or the second end.

11. A detection method based on the radio frequency detection system according to any one of claims 1 to 10, wherein the detection method comprises: