Radio frequency detection system and method of detection

Abstract

The application discloses a kind of radio frequency detection system and detection method, the radio frequency detection system includes mainboard, comprehensive tester and first test head.The mainboard is equipped with radio frequency signal line, and test part and antenna feed point are equipped on radio frequency signal line.Comprehensive tester is electrically connected with test part, to realize the purpose of detecting radio frequency signal on radio frequency signal line.The first test head is equipped with first end, second end and grounding part, first end is used to be electrically connected with antenna feed point, and second end and / or grounding part is used for grounding, and the distance from grounding part to first position is different from the distance from second position to first position. Wherein, first position refers to the position of first end for being electrically connected with antenna feed point, and second position refers to the position of second end for grounding.Using the radio frequency detection system and detection method provided by the application, multiple frequency radio frequency signals can be accurately detected to calibrate the radio frequency signals of electronic devices.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic equipment testing, and in particular to a radio frequency detection system and a detection method. BACKGROUND

[0002] In order to make the radio frequency signals (such as WIFI, GPS, antenna, etc.) emitted by the electronic equipment meet the design requirements of the electronic equipment, the radio frequency signals emitted by the electronic equipment need to be detected, and the radio frequency signals emitted by the electronic equipment are calibrated according to the detection results. However, when the radio frequency signals emitted by the electronic equipment are multi-frequency radio frequency signals, there is no effective means to detect the multi-frequency radio frequency signals, which affects the calibration of the radio frequency signals of the electronic equipment. SUMMARY

[0003] The embodiments of the present application disclose a radio frequency detection system and a detection method, which can accurately detect multi-frequency radio frequency signals to realize the calibration of the radio frequency signals of the electronic equipment.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, the present application discloses a radio frequency detection system, which comprises:

[0005] a mainboard, the mainboard is provided with a radio frequency signal line, the radio frequency signal line is provided with a test part and an antenna feed point, the antenna feed point is used for connecting an antenna;

[0006] a comprehensive tester, the comprehensive tester is connected with the test part, and the comprehensive tester is used for detecting the radio frequency signals on the radio frequency signal line; and

[0007] a first test head, the first test head is provided with a grounding part, the first test head has opposite first and second ends, the first end is used for electrically connecting with the antenna feed point, and the second end and / or the grounding part is used for grounding;

[0008] The position of the first end for electrically connecting with the antenna feed point is a first position, the position of the second end for grounding 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 in the direction from the first end to the second end.

[0009] As an optional implementation, in the embodiments of the present application, the grounding part is located between the end face of the second end and the end face of the first end.

[0010] As an optional implementation, in the embodiments of the present application, the grounding part comprises a plurality of grounding parts, and the plurality of grounding parts are arranged at intervals in the direction from the first end to the second end.

[0011] As an optional implementation, in the embodiment of the present application, the grounding part is slidably arranged on the first test head to change the distance between the grounding part and the first position.

[0012] As an optional implementation, in the embodiment of the present application, the first position is arranged on the end surface of the first end, and / or the second position is arranged on the end surface of the second end.

[0013] As an optional implementation, in the embodiment of the present application, the first test head further comprises an electrical connection part, which is arranged between the grounding part and the first position, and is used to connect with the grounding point of the antenna.

[0014] As an optional implementation, in the embodiment of the present application, the first test head comprises a first test conductor and a second test conductor movably arranged on the periphery of the first test conductor, the first test conductor comprises the first end and the second end, the electrical connection part is arranged on the first test conductor, and the second test conductor is used to form a separable electrical connection with the electrical connection part.

[0015] As an optional implementation, in the embodiment of the present application, the radio frequency detection system further comprises a second test head, and the test part is electrically connected with the test meter through the second test head.

[0016] As an optional implementation, in the embodiment of the present application, the second test head comprises a third test conductor and a fourth test conductor, the third test conductor is electrically connected with the test part and the test meter, the fourth test conductor is insulatedly connected with the third test conductor, and the fourth test conductor is used to be grounded, and the test meter is further electrically connected with the fourth test conductor.

[0017] As an optional implementation, in the embodiment of the present application, the radio frequency detection system satisfies the following relationship:

[0018] L1+L2=(0.175~0.325)λ

[0019] Wherein, L1 is the distance between the test part and the antenna feed point, L2 is the distance between the antenna feed point and the grounding part or the second end, and λ is the wavelength of the target radio frequency signal.

[0020] In a second aspect, the present application further discloses a detection method based on the radio frequency detection system of the first aspect, and the detection method comprises:

[0021] electrically connecting the radio frequency test meter with the test part to detect the radio frequency signal on the radio frequency signal line;

[0022] The first end of the first test head is electrically connected to the antenna feed point, and the second end and / or the grounding portion of the first test head is grounded.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] The radio frequency detection system and the detection method provided by the embodiment of the present application can reduce the influence of the radio frequency signal on the radio frequency signal line between the test portion and the antenna feed point and the radio frequency signal on the antenna feed point on the detection result of the comprehensive tester, so as to ensure the detection accuracy of the radio frequency signal. 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 signal. Therefore, the grounding portion and the second end are used for grounding, and the distances of the grounding portion and the second end to the antenna feed point are limited to be different, so that the grounding portion or the second end can be used for grounding when detecting radio frequency signals of different frequency bands, so as to adjust the distance between the antenna feed point and the grounding position, thereby adapting to the detection of radio frequency signals of different frequency bands, and accurately detecting multi-frequency radio frequency signals, so as to achieve the purpose of calibrating the radio frequency signal of the electronic device. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a structural schematic diagram of the radio frequency detection system disclosed by the embodiment of the present application;

[0027] Figure 2 is another structural schematic diagram of the radio frequency detection system disclosed by the embodiment of the present application;

[0028] Figure 3 is a structural exploded view of the first test head of the radio frequency detection system disclosed by the embodiment of the present application;

[0029] Figure 4 is a structural exploded view of the second test head of the radio frequency detection system disclosed by the embodiment of the present application;

[0030] Figure 5 is a flow chart of the detection method of the radio frequency detection system disclosed by the embodiments of the present application.

[0031] Main figure mark explanation: 10, radio frequency detection system; 11, mainboard; 12, comprehensive tester; 13, first test head; 131, grounding part; 1311, first grounding part; 1312, second grounding part; 132, first end; 133, second end; 134, power connection part; 135, first test conductor; 136, second test conductor; 137, first accommodating cavity; 14, radio frequency signal line; 15, test part; 151, first test part; 152, second test part; 16, antenna feed point; 17, sliding chute; 18, second test head; 181, third test conductor; 182, fourth test conductor; 183, second accommodating cavity; 19, radio frequency matching network. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0034] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific situation.

[0035] In addition, the terms "mounting", "setting", "provided with", "connection", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific situation.

[0036] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0037] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0038] Please see Figure 1 and Figure 2 This application discloses a radio frequency (RF) testing system, which includes a motherboard 11, a comprehensive tester 12, and a first test head 13. The motherboard 11 is a motherboard located within an electronic device, and it has RF signal lines 14. The RF signal lines 14 have a test section 15 and an antenna feed point 16 for connecting an antenna. The comprehensive tester 12 is an instrument for detecting RF signals, used to connect to the test section 15 to detect RF signals on the RF signal lines 14. The first test head 13 has a grounding section 131 and has a first end 132 and a second end 133. The first end 132 is used for electrical connection to the antenna feed point 16, and the second end 133 and / or the grounding section 131 are used for grounding. That is, the second end 133 is used for grounding, or the grounding section 131 is used for grounding, or both the second end 133 and the grounding section 131 are used for grounding simultaneously.

[0039] Specifically, the position of the first end 132 used for electrical connection with the antenna feed point 16 is designated as the first position, and the position of the second end 133 used for grounding is designated as the second position. Along the direction from the first end 132 to the second end 133, the distance from the grounding part 131 to the first position is different from the distance from the second position to the first position, so that the distance from the grounding part and the second end used for grounding to the antenna feed point is different.

[0040] The first end 132 has a first end face, and the second end 133 has a second end face. The first end 132 can be electrically connected to the antenna feed point 16 through the first end face or other positions (such as the outer peripheral surface of the first test head 13). When the first end 132 is electrically connected to the antenna feed point 16 through the first end face, the first position can be any position on the first end face. When the first end 132 is electrically connected to the antenna feed point 16 through other positions (such as the outer peripheral surface of the first test head 13), the first position can be any position on other positions (such as the outer peripheral surface of the first test head 13). The second end 133 can be grounded through the second end face or other locations (e.g., the outer peripheral surface of the first test head 13). When the second end 133 is grounded through the second end face, the second location can be any location on the second end face; and when the second end 133 is grounded through other locations (e.g., the outer peripheral surface of the first test head 13), the second location can be any location on other locations (e.g., the outer peripheral surface of the first test head 13).

[0041] In other words, the RF detection system 10 is equipped with a comprehensive tester 12, which is electrically connected to the test section 15 on the RF signal line 14. The RF detection system 10 is also equipped with a first test head 13, which has a second terminal 133 for grounding and a grounding part 131. When the second terminal 133 and / or the grounding part 131 is grounded, the RF signal line 14 between the test section 15 and the antenna feed point 16 is open-circuited. Therefore, when detecting the RF signal of the motherboard 11 of the electronic device, the influence of the RF signal on the RF signal line 14 between the test section 15 and the antenna feed point 16 and the RF signal on the antenna feed point 16 on the detection results of the comprehensive tester 12 can be reduced, so as to ensure the detection accuracy of the RF signal. When detecting radio frequency signals of different frequency bands, in order to ensure detection accuracy, it is necessary to control the distance between the antenna feed point 16 and the grounding position (i.e., the second end 133 or the grounding part 131) according to the wavelength of the radio frequency signal. Therefore, by setting the grounding part 131 and the second end 133 for grounding, and limiting the distances from the grounding part 131 and the second end 133 to the antenna feed point 16 to be different, when detecting radio frequency signals of different frequency bands, the grounding part 131 or the second end 133 can be used for grounding to adjust the distance between the antenna feed point 16 and the grounding position, thereby adapting to the detection of radio frequency signals of different frequency bands, and thus accurately detecting multi-frequency radio frequency signals to achieve the purpose of calibrating the radio frequency signals of electronic devices.

[0042] Furthermore, since the radio frequency detection system 10 provided in this embodiment is used, the detection accuracy of multi-frequency radio frequency signals can be ensured without welding test sockets at the test section 15, which can reduce the waste of test socket materials and help reduce the detection cost of multi-frequency radio frequency signals.

[0043] It is worth noting that the first end 132 can be electrically connected to the antenna feed point 16 by using a wire to connect the first end 132 to the antenna feed point 16, or by directly contacting the first end 132 to the antenna feed point 16. To facilitate the electrical connection between the first end 132 and the antenna feed point 16, this embodiment preferably uses the method of directly contacting the first end 132 to the antenna feed point 16.

[0044] Furthermore, the first position can be set on the first end face of the first end 132, that is, the position where the first end 132 is electrically connected to the antenna feed point 16 can be set on the first end face of the first end 132. In this way, when the electrical connection is achieved by direct contact between the first end 132 and the antenna feed point 16, it is beneficial to facilitate direct contact between the first end 132 of the first test head 13 and the antenna feed point 16 and to improve the connection stability between the first end 132 and the antenna feed point 16.

[0045] Similarly, the second position can also be set on the second end face of the second end 133, that is, the position of the second end 133 for grounding is set on the second end face of the second end 133. In this way, when the testing personnel directly connect the grounding wire to the second end face of the second end 133, the purpose of grounding the second end 133 can be achieved.

[0046] In some embodiments, the radio frequency detection system 10 satisfies the following relationship: L1 + L2 = (0.175 ~ 0.325)λ. Wherein, L1 is the distance between the test unit 15 and the antenna feed point 16, L2 is the distance between the antenna feed point 16 and the grounding part 131 or the distance between the antenna feed point 16 and the second position, and λ is the wavelength of the target radio frequency signal, that is, the wavelength of the target radio frequency signal transmitted on the radio frequency signal line 14.

[0047] It is understandable that when the second position is grounded and the grounding part 131 is not grounded, L2 is the distance between the antenna feed point 16 and the second position; when the second position is not grounded and the grounding part 131 is grounded, L2 is the distance between the antenna feed point 16 and the grounding part 131; when both the second position and the grounding part 131 are grounded, L2 is the smaller of the distance between the antenna feed point 16 and the second position and the distance between the antenna feed point 16 and the grounding part 131.

[0048] When the RF detection system 10 satisfies the above relationship, it can minimize the impact of the RF signal on the RF signal line 14 between the test unit 15 and the antenna feed point 16, as well as the RF signal on the antenna feed point 16, on the detection results of the comprehensive tester 12, which is beneficial to improving the detection accuracy of the comprehensive tester 12 for RF signals. If the sum of the distance between the test unit 15 and the antenna feed point 16 and the distance between the antenna feed point 16 and the ground part 131, or the sum of the distance between the test unit 15 and the antenna feed point 16 and the distance between the antenna feed point 16 and the second position, does not satisfy the above relationship, the impedance on the RF signal line 14 between the test unit 15 and the antenna feed point 16 will differ significantly from the impedance of the comprehensive tester 12, which will cause inaccurate detection data from the comprehensive tester 12.

[0049] In some embodiments, the grounding portion 131 may be located between the second end face of the second end 133 and the first end face of the first end 132, which can improve the position that the grounding portion 131 can be set on, and is beneficial to increasing the number of grounding portions 131 set on the first test head 13.

[0050] Specifically, the grounding part 131 can be a probe or a wire, etc., which can be determined according to the actual situation. As long as the grounding part 131 can be used for grounding, this embodiment does not make specific limitations.

[0051] The structure of the radio frequency detection system 10 will be described below with the example of the first position being set on the first end face of the first end 132, the second position being set on the second end face of the second end 133, and the grounding part 131 being located between the second end face of the second end 133 and the first end face of the first end 132.

[0052] As an optional implementation method, such as Figure 1 As shown, the number of grounding portions 131 can be one or more, for example, one, two, three, four, or more, depending on the frequency of the multi-frequency radio frequency signal. That is, the number of grounding portions 131 is the frequency of the radio frequency signal minus one. When there are multiple grounding portions 131, they are spaced apart along the direction from the first end 132 to the second end 133. This allows the testing personnel to select the appropriate grounding portion 131 for grounding according to the frequency band of the radio frequency signal to be tested. The frequency of the multi-frequency radio frequency signal refers to the total number of different frequencies of the radio frequency signal in the multi-frequency radio frequency signal; for example, the frequency of a three-frequency radio frequency signal is three.

[0053] For example, when the multi-frequency radio frequency signal is a tri-frequency radio frequency signal, the tri-frequency radio frequency signal is a low-frequency radio frequency signal, a mid-frequency radio frequency signal, and a high-frequency radio frequency signal, then there are two grounding parts 131, namely a first grounding part 1311 and a second grounding part 1312, and the first grounding part 1311 and the second grounding part 1312 are spaced apart between the first end 132 and the second end 133, with the first grounding part 1311 located between the second grounding part 1312 and the first end 132. That is, along the direction from the first end 132 to the second end 133, the grounding positions on the first test head 13 are the first grounding part 1311, the second grounding part 1312, and the second end 133, respectively. Thus, when the second terminal 133 is grounded, the RF detection system 10 is used to detect low-frequency RF signals; when the second grounding part 1312 is grounded, the RF detection system 10 is used to detect mid-frequency RF signals; and when the first grounding part 1311 is grounded, the RF detection system 10 is used to detect high-frequency RF signals.

[0054] It is worth noting that only one of the first grounding part 1311, the second grounding part 1312, and the second terminal 133 can be grounded, any two can be grounded, or all three can be grounded simultaneously. When any two or all three are grounded simultaneously, the RF detection system 10 can only be used to detect RF signals in the corresponding frequency band that can be detected at the grounding position closest to the first terminal 132. For example, when the first grounding part 1311 and the second grounding part 1312 are grounded simultaneously, the RF detection system 10 can only be used to detect RF signals in the high-frequency band.

[0055] As another alternative implementation method, such as Figure 2As shown, the grounding part 131 is slidably disposed on the first test head 13, that is, the grounding part 131 can slide relative to the first end 132 to change the distance between the grounding part 131 and the first position. Specifically, the first test head 13 is provided with a groove 17, and the grounding part 131 is slidably disposed in the groove 17, so that the grounding part 131 can slide relative to the first end 132 in the groove 17, thereby changing the distance between the antenna feed point 16 and the grounding part 131, so that the radio frequency detection system 10 can be applied to the detection of radio frequency signals in different frequency bands. For example, during radio frequency (RF) signal detection, the grounding part 131 can be grounded. When detecting low-frequency RF signals, the grounding part 131 can be slid to the third position, such that the sum of the distance between the test part 15 and the antenna feed point 16 and the distance between the antenna feed point 16 and the grounding part 131 is 0.175 to 0.325 times the wavelength of the low-frequency RF signal. When detecting mid-frequency RF signals, the grounding part 131 can be slid to the fourth position, such that the sum of the distance between the test part 15 and the antenna feed point 16 and the distance between the antenna feed point 16 and the grounding part 131 is 0.175 to 0.325 times the wavelength of the mid-frequency RF signal. In other words, by placing the grounding part 131 in the slot 17, the RF detection system 10 can be used to detect RF signals of multiple frequency bands, which improves the flexibility of the RF detection system 10. Furthermore, by using this method to set the grounding part 131, only one grounding part 131 is needed to achieve the purpose of detecting radio frequency signals of multiple frequency bands, which helps to reduce the cost of the radio frequency detection system 10.

[0056] Both of the above implementation methods enable the radio frequency detection system 10 to detect multi-frequency radio frequency signals such as tri-frequency, quad-frequency, or penta-frequency signals, or to detect multi-frequency radio frequency signals on the motherboard 11 of different electronic devices.

[0057] In some embodiments, the first test head 13 is further provided with a power receiving part 134, which is located between the grounding part 131 and the first position. The power receiving part 134 is used to connect to the grounding point of the antenna. The first test head 13 is further provided with a power receiving part 134 mainly because the antenna electrically connected to the antenna feed point 16 is usually provided with a grounding point. During the radio frequency signal detection process, part of the radio frequency signal transmitted to the antenna feed 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 head 15 to the antenna feed point 16 and the distance from the antenna feed point 16 to the grounding position (i.e., the grounding part 131 or the second position) of the first test head 13 to be 0.175 to 0.325 times the wavelength of the target radio frequency signal, the influence of the radio frequency signal on the radio frequency signal line 14 between the test head 15 and the antenna feed point 16 and the radio frequency signal on the antenna feed point 16 on the detection results of the comprehensive tester 12 can be reduced to a large extent. Without the power connector 134, the distance between the test unit 15 and the antenna grounding point is determined according to the design requirements of the electronic equipment. This distance cannot guarantee that it will be 0.175 to 0.325 times the wavelength of the target RF signal. When the distance is outside this range, the RF signal on the antenna will significantly affect the detection results of the integrated tester 12, resulting in low RF signal detection accuracy. Therefore, by providing the power connector 134 and electrically connecting the antenna grounding point to it, the RF signal on the antenna can be transmitted to the first test head 13 via the power connector 134. This ensures that all RF signals transmitted to the antenna feed point 16 are also transmitted to the first test head 13. In this way, the tester only needs to consider that the sum of the distance from the test section 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 to 0.325 times the wavelength of the target radio frequency signal to achieve the purpose of improving the detection accuracy of the radio frequency detection system 10.

[0058] Please see Figure 3In some embodiments, the first test head 13 includes a first test conductor 135 and a second test conductor 136 movably located on the outer periphery of the first test conductor 135. The first test conductor 135 includes the aforementioned first end 132 and second end 133, and both the power receiving portion 134 and the grounding portion 131 are disposed on the first test conductor 135. When the RF detection system 10 is in detection mode, the second test conductor 136 can be electrically connected to the power receiving portion 134. Specifically, the first test conductor 135 is used to transmit the RF signal transmitted from the antenna feed point 16 to the first test head 13, and the antenna feed point 16 achieves grounding through the grounding portion 131 or grounding at a second location. A groove 17 is disposed on the second test conductor 136. When the RF detection system 10 is in detection mode, the second test conductor 136 is electrically connected to the grounding part 134, thereby enabling the second test conductor 136 to be electrically connected to the first test conductor 135 through the grounding part 131 or a second position on the first test conductor 135. The reason for this design is that 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. By setting a grounded second test conductor 136 on the outer periphery of the first test conductor 135, 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 grounding part 134, thus avoiding the impact on the detection accuracy of the comprehensive tester 12 due to the RF signal radiating into the air from the first test conductor 135. In other words, by setting up the second test conductor 136 and grounding it through the grounding part 134, the detection accuracy of the RF detection system 10 is improved.

[0059] Optionally, both the first test conductor 135 and the second test conductor 136 can be cylindrical structures, such as cylinders or prisms. The following example illustrates this using both the first test conductor 135 and the second test conductor 136 as cylinders (see details). Figure 3 ):

[0060] When both the first test conductor 135 and the second test conductor 136 are cylindrical, in some embodiments, a first receiving cavity 137 is provided inside the second test conductor 136, and the first test conductor 135 is disposed inside the first receiving cavity 137 and at least partially disposed outside the first receiving cavity 137. It is understood that by disposing the first test conductor 135 inside the first receiving cavity 137, and having a grounded second test conductor 136 on its outer periphery, the detection effect of the first test conductor 135 on radio frequency signals can be improved. Furthermore, by partially disposing the first test conductor 135 outside the first receiving cavity 137, the first position on the first end 132 for electrical connection with the antenna feed point 16 can be located at the portion of the first test conductor 135 disposed outside the first receiving cavity 137, preventing the second test conductor 136 from obscuring the first position and facilitating the electrical connection between the first position and the antenna feed point 16.

[0061] Optionally, the grounding part 134 can be disposed on the portion of the first test conductor 135 located outside the first accommodating cavity 137, or on the portion of the first test conductor 135 located inside the first accommodating cavity 137, as long as it ensures that the second test conductor 136 can be electrically connected to the grounding part 134 and the antenna grounding point can be electrically connected to the grounding part 134. In this embodiment, it is preferable that the grounding part 134 is disposed on the portion of the first test conductor 135 located outside the first accommodating cavity 137, so that the grounding part 134 can be exposed outside the first accommodating cavity 137, which provides a larger operating space when connecting the antenna grounding point to the grounding part 134, and is beneficial to the electrical connection between the antenna grounding point and the grounding part 134.

[0062] As described above, when the radio frequency detection system 10 is in the detection state, the second test conductor 136 is electrically connected to the receiving part 134. Optionally, the second test conductor 136 is electrically connected to the receiving part 134 inseparably, or it is electrically connected to the receiving part 134 detachably.

[0063] Specifically, the non-separable electrical connection of the second test conductor 136 to the receiving part 134 means that the second test conductor 136 is always electrically connected to the receiving part 134 when the RF detection system 10 is in detection mode and non-detection mode. The detachable electrical connection of the second test conductor 136 to the receiving part 134 means that when the RF detection system 10 is in non-detection mode, the second test conductor 136 is not electrically connected to the receiving part 134; when the RF detection system 10 is in detection mode, the second test conductor 136 is electrically connected to the receiving part 134. Because the second test conductor 136 is non-separable electrically connected to the receiving part 134, and the second test conductor 136 is always electrically connected to the receiving part 134, the second test conductor 136 may partially obscure the receiving part 134, thereby reducing the connection space between the antenna grounding point and the receiving part 134, which is detrimental to the electrical connection between the antenna grounding point and the receiving part 134. Therefore, in this embodiment, it is preferable that the second test conductor 136 is detachably electrically connected to the grounding part 134.

[0064] In some embodiments, when the second test conductor 136 is detachably electrically connected to the receiving part 134, the receiving part 134 may be located at the portion of the first test conductor 135 outside the first accommodating cavity 137, and a first spring is provided on the first test conductor 135. The first spring is used to drive the second test conductor 136 to move relative to the receiving part 134. That is, when the RF detection system 10 is in a non-detection state, the first spring is in its original state, and the second test conductor 136 is separated from the receiving part 134. When the RF detection system 10 performs RF signal detection, a force can be applied to the second test conductor 136 toward the receiving part 134, causing the first spring to be compressed, thereby driving the second test conductor 136 to move toward the receiving part 134 until the second test conductor 136 is electrically connected to the receiving part 134. When the RF detection system 10 finishes detection, the force applied to the second test conductor 136 is stopped, the first spring returns to its original state, thereby driving the second test conductor 136 back to its original position.

[0065] Since the contact point connecting the comprehensive tester 12 and the test unit 15 may be a clip or screw, directly connecting the contact point of the comprehensive tester 12 to the test unit 15 would result in a loose connection, leading to poor connection stability and affecting the comprehensive tester 12's detection of radio frequency signals. Therefore, in some embodiments, the radio frequency detection system 10 further includes a second test head 18, through which the comprehensive tester 12 is electrically connected to the test unit 15. This improves the connection stability between the comprehensive tester 12 and the test unit 15, thereby ensuring the comprehensive tester 12's detection of radio frequency signals.

[0066] Furthermore, 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 section 15 and the comprehensive tester 12, respectively. This allows the radio frequency (RF) signal from the test section 15 to be transmitted to the comprehensive tester 12 via the third test conductor 181, thereby achieving the purpose of detecting the RF signal. Specifically, the fourth test conductor 182 is insulated from the third test conductor 181 and is grounded. This design is primarily because when the RF signal is transmitted on the third test conductor 181, the RF signal on the third test conductor 181 will radiate into the air. By setting a grounded fourth test conductor 182 on the outer periphery of the third test conductor 181, the fourth test conductor 182 can receive the RF signal radiated from the third test conductor 181, preventing the RF signal on the third test conductor 181 from radiating into the air and affecting the detection accuracy of the comprehensive tester 12. In other words, by setting the fourth test conductor 182 and grounding it, the detection accuracy of the RF detection system 10 is improved. In addition, insulating the fourth test conductor 182 from the third test conductor 181 can prevent the radio frequency signal from being unable to be transmitted to the comprehensive tester 12 for testing due to the electrical connection between the third test conductor 181 and the fourth test conductor 182.

[0067] Furthermore, the comprehensive test instrument 12 is also electrically connected to the fourth test conductor 182, which enables the comprehensive test instrument 12 to be grounded, thereby improving the detection accuracy of the comprehensive test instrument 12 for radio frequency signals.

[0068] To facilitate grounding of the comprehensive test instrument 12, in some embodiments, the test unit 15 includes a first test unit 151 and a second test unit 152. The first test unit 151 is disposed on the radio frequency signal line 14, and the second test unit 152 is disposed on the outer periphery of the first test unit 151 and grounded, and the second test unit 152 is insulated from the first test unit 151. When performing radio frequency signal detection, the third test conductor 181 is electrically connected to the first test unit 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 unit 151, thereby the radio frequency signal can be transmitted to the comprehensive test instrument 12 for measurement through the third test conductor 181. Furthermore, when performing radio frequency (RF) signal detection, the fourth test conductor 182 is electrically connected to the second test section 152. Since the second test section 152 is grounded, when the fourth test conductor 182 is electrically connected to the second test section 152, the fourth test conductor 182 is also grounded. This improves the effect of RF signal transmission along the third test conductor 181 and prevents the RF signal on the third test conductor 181 from dissipating into the air, thereby affecting the detection accuracy of the comprehensive tester 12. Moreover, when the comprehensive tester 12 is electrically connected to the fourth test conductor 182, the comprehensive tester 12 can achieve the purpose of grounding. Among them, the first test section 151 is the conductive material on the RF signal line 14, and the second test section 152 is the ground layer of the motherboard 11.

[0069] Furthermore, there are two second test sections 152, which can be arranged in an elliptical or circular arc shape on both sides of the radio frequency signal line 14. The specific number of second test sections 152 can be determined according to the actual situation, as long as the second test sections 152 are insulated from the outer periphery of the first test section 151.

[0070] Optionally, the third test conductor 181 may be a columnar structure (see details). Figure 4 The fourth test conductor 182 can also be a cylindrical or prismatic structure, such as a cylindrical or prismatic structure. The following explanation will assume that both the third test conductor 181 and the fourth test conductor 182 are cylindrical structures.

[0071] In some embodiments, the fourth test conductor 182 is provided with 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 located outside the second receiving cavity 183. The following will illustrate the case where the third test conductor 181 is at least partially located outside the second receiving cavity 183:

[0072] In one example, the contact surfaces of the third test conductor 181 and the first test section 151 and the fourth test conductor 182 and the second test section 152 are located on the same plane. In this way, when the third test conductor 181 is electrically connected to the first test section 151, the fourth test conductor 182 can be electrically connected to the second test section 152, which helps to simplify the detection steps of radio frequency signals.

[0073] In another exemplary configuration, the contact surfaces of the third test conductor 181 and the first test section 151, and the contact surfaces of the fourth test conductor 182 and the second test section 152, are located on different planes. Specifically, the height of the third test conductor 181 is greater than the height of the fourth test conductor 182, and a second spring is provided on the third test conductor 181. When the third test conductor 181 is electrically connected to the first test section 151, the fourth test conductor 182 cannot be electrically connected to the second test section 152. When a force is applied to the fourth test conductor 182 toward the second test section 152, the second spring is compressed, and the fourth test conductor 182 moves toward the second test section 152 until it contacts it, thus achieving grounding of the fourth test conductor 182. By using a second spring on the third test conductor 181, the RF signal line 14 can be reconnected only when testing the RF signal, which improves the safety of the RF detection system 10.

[0074] In some embodiments, the RF detection system 10 further includes an RF matching network 19, which is connected in series between the test unit 15 and the antenna feed point 16. The RF matching network 19 is used to adjust the RF signal of the antenna so that the RF signal matches the design requirements of the electronic device. Specifically, the RF matching network 19 is actually a resistor connected in series between the test unit 15 and the antenna feed point 16.

[0075] Furthermore, to improve the detection accuracy of the RF signals on the motherboard 11 by the RF detection system 10, the RF matching network 19 preferably uses a zero-ohm resistor, with the inductance L of the zero-ohm resistor being 10nH≤L≤6.2H and the capacitance C of the zero-ohm resistor being 1pF≤C≤5.6pF. This helps to reduce the impedance on the RF signal line 14 between the test section 15 and the antenna feed point 16, and helps to improve the detection accuracy of the RF signals by the RF detection system 10.

[0076] Please see Figure 5 This application also discloses a detection method for an RF detection system, which is the aforementioned RF detection system. Using this detection method to detect RF signals can accurately detect multi-frequency RF signals, thereby achieving the calibration of RF signals of electronic devices.

[0077] Specifically, the detection method includes the following steps:

[0078] Step 201: Form the test section on the motherboard.

[0079] In other words, the test section is formed during the production of the motherboard of electronic devices. Therefore, when radio frequency signals are detected, there is no need to form the test section on the motherboard through additional steps, which helps to simplify the radio frequency signal detection process.

[0080] Furthermore, the test section includes a first test section and a second test section. The first test section is located on the radio frequency signal line, and the second test section is located on the outer periphery of the first test section and grounded. The second test section is insulated from the first test section. If the first test section and the second test section are electrically connected, the comprehensive tester will be unable to detect the radio frequency signal, and may even affect the transmission of the radio frequency signal on the motherboard.

[0081] Specifically, the first test section is a conductive material on the radio frequency signal line, and the second test section is the ground layer of the motherboard. That is to say, the surface of the motherboard of an electronic device has radio frequency signal lines and a ground layer. During the production of the motherboard, solder resist is applied to the surface of the motherboard with the radio frequency signal lines and the ground layer to prevent open circuits in the motherboard's circuitry. The method for forming test sections on the motherboard provided in this embodiment refers to: when applying solder resist to the surface of the motherboard, the locations of the first and second test sections are shielded to prevent solder resist from being applied to the first and second test sections, thereby enabling the comprehensive test instrument to electrically connect with the first and second test sections.

[0082] Understandably, since motherboards in electronic devices often use copper as a conductive material, the first and second test sections are also made of copper. Of course, to improve the transmission efficiency of radio frequency signals, silver or gold can be plated onto the surfaces of the first and second test sections.

[0083] Step 202: Connect the comprehensive tester to the test section.

[0084] In this step, the second test head can be electrically connected to the test section, and then the comprehensive tester can be electrically connected to the second test head; alternatively, the second test head can be electrically connected to the comprehensive tester, and then the second test head can be electrically connected to the test section. The choice can be made according to the testing personnel's habits. This embodiment does not impose specific limitations, as long as it ensures that the comprehensive tester can be electrically connected to the test section to detect the radio frequency signals on the radio frequency signal lines.

[0085] Step 203: Connect the first end of the first test head to the antenna feed point, and ground the second end and / or grounding part of the first test head.

[0086] As an example, when the first test head has multiple grounding points, the grounding position of the first test head can be selected according to the wavelength of the target radio frequency signal being tested. For example, assuming the radio frequency signal on the radio frequency line is a dual-frequency radio frequency signal, namely a low-frequency radio frequency signal and a mid-frequency radio frequency signal, during testing, the grounding point or the second terminal can be selected for grounding according to the wavelengths of the low-frequency radio frequency signal and the mid-frequency radio frequency signal. For example:

[0087] When testing mid-frequency radio frequency signals, the grounding part can be grounded so that the sum of the distance between the test part and the antenna feed point and the distance between the antenna feed point and the grounding part or second end used for grounding is 0.175 to 0.325 times the wavelength of the target mid-frequency radio frequency signal.

[0088] When detecting low-frequency radio frequency signals, the second end can be grounded so that the sum of the distance between the test section and the antenna feed point and the distance between the antenna feed point and the grounding part or the second end used for grounding is 0.175 to 0.325 times the wavelength of the target low-frequency radio frequency signal.

[0089] It is worth noting that when choosing the grounding part for grounding, the second end can also be grounded, which will not affect the test results of the comprehensive tester.

[0090] In another exemplary manner, when the grounding portion on the first test head is slidably disposed on the first test head, the grounding portion can be grounded and slid to a suitable position so that the sum of the distance between the test portion and the antenna feed point and the distance between the antenna feed point and the grounding portion is 0.175 to 0.325 times the wavelength of the target frequency band radio frequency signal. For example, assume that the radio frequency signal on the radio frequency line is a dual-frequency radio frequency signal, namely a low-frequency radio frequency signal and a mid-frequency radio frequency signal.

[0091] When detecting low-frequency radio frequency signals, the grounding part is grounded and slid to the third position, so that the sum of the distance between the test part and the antenna feed point and the distance between the antenna feed point and the grounding part is 0.175 to 0.325 times the wavelength of the target low-frequency radio frequency signal.

[0092] When testing mid-frequency radio frequency signals, the grounding part is grounded and slid to the fourth position, so that the sum of the distance between the test part and the antenna feed point and the distance between the antenna feed point and the grounding part is 0.175 to 0.325 times the wavelength of the target mid-frequency radio frequency signal.

[0093] It is understood that step 202 can be performed before step 203, or step 203 can be performed before step 202. The specific choice can be determined according to the testing habits of the testing personnel. This embodiment does not impose any specific limitations.

[0094] Step 204: Read the test results from the comprehensive tester.

[0095] This involves reading the detection results of the radio frequency (RF) signal obtained by the comprehensive tester. These results can be the power or wavelength of the RF signal, etc. If the detection results show that the detected RF signal is the target RF signal of the electronic device, the detection operation ends. If the detection results show that the RF signal is not the target RF signal of the electronic device, the RF signal is calibrated according to the detection results, and then steps 202 and 203 are repeated until the detected RF signal on the motherboard is the target RF signal of the electronic device.

[0096] The radio frequency detection system and detection method disclosed in the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the radio frequency detection system and detection method of the present invention and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A radio frequency detection system, characterized in that, The radio frequency detection system includes: The motherboard is equipped with radio frequency signal lines, and the radio frequency signal lines are equipped with a test section and an antenna feed point, the antenna feed point being used to connect an antenna; A comprehensive test instrument, connected to the test unit, is used to detect the radio frequency signal on the radio frequency signal line; and A first test head, the first test head having a grounding part, the first test head having a first end and a second end opposite to each other, the first end being used to be electrically connected to the antenna feed point, and the second end and / or the grounding part being used for grounding; The position at the first end for electrical connection with the antenna feed point is the first position, and the position at the second end for grounding is the second position. Along the direction from the first end to the second end, the distance from the grounding part to the first position is different from the distance from the second position to the first position. The radio frequency detection system satisfies the following relationship: L1 + L2 = (0.175 ~ 0.325)λ Wherein, L1 is the distance between the test section and the antenna feed point, L2 is the distance between the antenna feed point and the grounding section or the second end, and λ is the wavelength of the target radio frequency signal.

2. The radio frequency detection system according to claim 1, characterized in that, The grounding portion is located between the end face of the second end and the end face of the first end.

3. The radio frequency detection system according to claim 2, characterized in that, The grounding portion includes multiple portions, which are spaced apart along the direction from the first end to the second end.

4. The radio frequency detection system according to claim 1, characterized in that, The grounding part can be slidably disposed on the first test head to change the distance between the grounding part and the first position.

5. The radio frequency detection system according to claim 1, characterized in that, The first position is located on the end face of the first end, and / or the second position is located on the end face of the second end.

6. The radio frequency detection system according to claim 1, characterized in that, The first test head is also provided with a power receiving part, which is located between the grounding part and the first position, and the power receiving part is used to connect to the grounding point of the antenna.

7. The radio frequency detection system according to claim 6, characterized in that, The first test head includes a first test conductor and a second test conductor movably located on the outer periphery of the first test conductor. The first test conductor includes a first end and a second end. The contact portion is disposed on the first test conductor, and the second test conductor is used to form a separable electrical connection with the contact portion.

8. The radio frequency detection system according to any one of claims 1-7, characterized in that, The radio frequency detection system also includes a second test head, and the comprehensive tester is electrically connected to the test unit through the second test head.

9. The radio frequency detection system according to claim 8, characterized in that, The second test head includes a third test conductor and a fourth test conductor. The third test conductor is electrically connected to the test section and the comprehensive tester. The fourth test conductor is insulated from the third test conductor and is used for grounding. The comprehensive tester is also electrically connected to the fourth test conductor.

10. A detection method based on the radio frequency detection system according to any one of claims 1-9, characterized in that, The detection method includes: The comprehensive tester is electrically connected to the test section to detect the radio frequency signal on the radio frequency signal line; The first end of the first test head is electrically connected to the antenna feed point, and the second end of the first test head and / or the grounding part are grounded.

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