High-frequency load board suitable for radio frequency integrated circuit testing machine and fastening device of high-frequency load board

Abstract

The invention belongs to the technical field of high-frequency load boards, and particularly relates to a high-frequency load board suitable for a radio frequency integrated circuit testing machine and a fastening device of the high-frequency load board. Installing a plurality of blind matching A joints; in the blind matching A connector, a floating body is located in a connector shell, an elastic piece is installed between the floating body and the connector shell, a core body penetrates through the middle of the connector shell and the floating body, and a floating head is fixedly installed on the outer side of the core body. A columnar second cavity is formed in the middle of the side, away from the floating head, of the floating body. The initial length of the elastic piece is equal to the sum of the height of the second cavity and the designed floating stroke of the blind matching A connector. Compared with the prior art, the invention has the beneficial effects that a plurality of blind-match joints with the frequency up to 44GHz are designed on the load board, and the test frequency, the test channel and the test function of the load board are provided; the floating stroke of the blind matching connector is designed, the whole load board moves downwards synchronously when the fastening device is matched for fastening, multi-channel accurate butt joint is achieved, and the testing efficiency and the testing speed of the radio frequency integrated circuit in batch and high-frequency testing are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of high-frequency load boards, and in particular relates to a high-frequency load board suitable for a radio frequency integrated circuit tester and a fastening device thereof. Background Art

[0002] RFIC testers are mainly used for RFIC testing. With the rapid development of microelectronics and millimeter wave technologies, the demand for RFICs has exploded, and the requirements for test frequency, number of test channels, and multi-function testing are getting higher and higher. The test loadboard is the bridge between test resources and the device under test. Therefore, how to enhance the test frequency, number of test channels, and test functions of the loadboard is a problem that needs to be solved urgently by RFIC testers at this stage.

[0003] At present, the frequency of RF integrated circuits, such as T / R, amplifiers, filters and other chips, is getting higher and higher, reaching up to 44GHz, while the RF channels designed on the current load board can only reach up to 26.5GHz. At present, when manufacturers test RF integrated circuits with RF frequencies up to 44GHz, they generally connect the test resources to the sorting machine through test cables, or connect them to the fixture through cables. The test efficiency of this connection method is too low; the number of RF integrated circuits is increasing, and a single RF integrated circuit tester needs to be connected to the sorting machine. The number of test channels needs to be increased to improve the test efficiency of the tester, while the test channels on the current load board can only reach 32 channels; RF integrated circuit design is becoming more and more complex, not only RF parameters need to be tested, but also digital testing, analog testing, voltage power supply and other testing functions need to be provided.

[0004] According to the above analysis, it is necessary to design a 44GHz frequency multi-channel Loadboard to connect with the sorting machine to improve the automation of the RF integrated circuit tester. The difficulties encountered in the design are: 1. The problem of accurately connecting the 44GHz connector on the Loadboard with the connector of the tester; 2. The problem of plugging and unplugging dozens of channels at the same time without damaging the connecting components. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a high-frequency load board suitable for a radio frequency integrated circuit tester, and designs a fastening device for the high-frequency load board.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: a high-frequency load board suitable for a radio frequency integrated circuit tester, comprising: a high-frequency blind-mate connector area for radio frequency signal transmission, in which a plurality of blind-mate A connectors are installed; in the blind-mate A connector, a float is located in a connector shell, an elastic member is installed between the float and the connector shell, a core passes through the middle of the connector shell and the float, and a float head is fixedly installed on the outside of the core; a columnar second cavity is opened in the middle of the side of the float away from the float head, and the initial length of the elastic member is equal to the sum of the height of the second cavity and the designed floating stroke of the blind-mate A connector.

[0007] Furthermore, it also includes: a plurality of positioning pins, which are arranged on both sides of the load plate.

[0008] Furthermore, it also includes: more than two positioning holes.

[0009] Furthermore, the load board is also provided with an analog connection area and a digital connection area.

[0010] A high-frequency load plate fastening device comprises: a linear motor, a left slider, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod and a right slider, wherein the linear motor is connected to the first connecting rod through the left slider, the first connecting rod is connected to the third connecting rod through the second connecting rod, the third connecting rod is connected to the fifth connecting rod through the fourth connecting rod, the right slider is installed at the end of the fifth connecting rod, the travel directions of the left slider and the right slider are parallel and opposite, and the left slider and the right slider are provided with sliding grooves on the relative inner sides, the sliding grooves include a vertical end and an oblique section connected to each other, and the vertical end is open above.

[0011] Further, the moving directions of the left slider and the right slider are parallel to the output direction of the linear motor.

[0012] Furthermore, the second connecting rod and the fourth connecting rod are both in an "L" structure of equal length, and the end connection mode is a rotation connection.

[0013] The high frequency load board fastening device is installed on the test machine for use.

[0014] Furthermore, a proximity switch is fixedly installed on the right slider, and a limit sensing block is installed on the test machine at a position corresponding to the movement limit position of the right slider.

[0015] Furthermore, the linear motor is fixedly installed on the test machine platform, and parallel guide rails are provided on the test machine platform. The left slider and the right slider are respectively slidably mounted in the parallel linear guide rails.

[0016] Compared with the prior art, the present invention has the following beneficial effects: multiple blind-mate connectors with a frequency of up to 44 GHz are designed on the load board to provide a test frequency of the load board, increase the test channels, and enhance the test function of the load board; the floating blind-mate connector, when fastened with the fastening device, the entire load board moves downward synchronously, realizing simultaneous plugging and unplugging of multiple channels, replacing manual wiring, and can effectively improve the test efficiency and test speed of radio frequency integrated circuits during batch and high-frequency testing; the floating stroke of the blind-mate connector and the slide groove in the fastening device are designed to reasonably control the compression amount, thereby realizing precise docking of multi-channel connectors and not easily damaging connectors and other connecting devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a high frequency load board suitable for a radio frequency integrated circuit tester; Figure 2 This is a schematic diagram of blind mating A connector; Figure 3 It is a schematic diagram of the principle of the fastening mechanism in the present invention; Figure 4 The schematic diagram of the chute position and shape; Figure 5 A schematic diagram of a test machine using a fastening mechanism; In the figure: 1, load board, 2, test machine, 3, fastening mechanism, 101, high-frequency blind-mate connector area, 102, analog connection area, 103, digital connection area, 104, positioning hole, 105, positioning pin, 106, blind-mate A connector, 107, connector shell, 108, float, 109, end, 110, middle, 111, tail, 112, elastic member, 113, first cavity, 114, second cavity, 115, core, 116. floating head; 201. RF test port area; 202. multi-functional connection area; 301. linear motor; 302. motor telescopic rod; 303. left slider; 304. first connecting rod; 305. second connecting rod; 306. third connecting rod; 307. fourth connecting rod; 308. fifth connecting rod; 309. right slider; 310. proximity switch; 311. limit sensor block; 312. slide groove; 313. vertical end; 314. oblique section. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0019] Combination Figure 1-2It is understood that the high-frequency load board suitable for the radio frequency integrated circuit tester includes: a high-frequency blind-mate connector area 101 for radio frequency signal transmission, in which a plurality of blind-mate A connectors 106 are installed; in the blind-mate A connector 106, a float 108 is located in a connector shell 107, an elastic member 112 is installed between the float 108 and the connector shell 107, a core 115 passes through the middle of the connector shell 107 and the float 108, and a float head 116 is fixedly installed on the outer side of the core 115; a cylindrical second cavity 114 is opened in the middle of the float 108 away from the float head 116, and the initial length of the elastic member 112 is equal to the sum of the height of the second cavity 114 and the designed floating stroke of the blind-mate A connector 106.

[0020] In one embodiment, the load plate 1 further includes: a plurality of positioning pins 105 , wherein the positioning pins 105 are arranged on both sides of the load plate 1 .

[0021] In one embodiment, it further includes: more than two positioning holes 104 .

[0022] In one embodiment, an analog connection area 102 and a digital connection area 103 are further provided on the load board 1 .

[0023] Combination Figure 3-4 It is understood that the high-frequency load plate fastening device includes: a linear motor 301, a left slider 303, a first connecting rod 304, a second connecting rod 305, a third connecting rod 306, a fourth connecting rod 307, a fifth connecting rod 308 and a right slider 309, the linear motor 301 is connected to the first connecting rod 304 through the left slider 303, the first connecting rod 304 is connected to the third connecting rod 306 through the second connecting rod 305, the third connecting rod 306 is connected to the fifth connecting rod 308 through the fourth connecting rod 307, the right slider 309 is installed at the end of the fifth connecting rod 308, the travel directions of the left slider 303 and the right slider 309 are parallel and opposite, and the left slider 303 and the right slider 309 are provided with a slide groove 312 on the relative inner sides, the slide groove 312 includes a vertical end 313 and an inclined section 314 connected to each other, and the vertical end 313 is open above.

[0024] In one embodiment, the moving directions of the left slider 303 and the right slider 309 are parallel to the output direction of the linear motor 301 .

[0025] In one embodiment, the second connecting rod 305 and the fourth connecting rod 307 are both in an "L" structure of equal length, and the end connection mode is a rotation connection.

[0026] The high frequency load plate fastening device is installed on the test machine 2 and used in combination with Figure 5 understand.

[0027] In one embodiment, a proximity switch 310 is fixedly mounted on the right slider 309 , and a limit sensing block 311 is mounted on the test machine 2 at a position corresponding to the limit of movement of the right slider 309 .

[0028] In one embodiment, the linear motor 301 is fixedly mounted on the test machine 2 , and parallel guide rails are provided on the test machine 2 . The left slider 303 and the right slider 309 are respectively slidably mounted in the parallel linear guide rails.

[0029] Example 1: Combination Figure 1-2 It is understood that the high-frequency load board suitable for the radio frequency integrated circuit tester includes: a blind-mate connector area 101 with a design frequency of up to 44 GHz for radio frequency signal transmission, 40 blind-mate A connectors 106 are installed in the high-frequency blind-mate connector area 101; in the blind-mate A connector 106, a float 108 is located in a connector shell 107, an elastic member 112 is installed between the float 108 and the connector shell 107, a core 115 passes through the middle of the connector shell 107 and the float 108, and a float head 116 is fixedly installed on the outer side of the core 115; a cylindrical second cavity 114 is opened in the middle of the float 108 away from the float head 116, and the initial length of the elastic member 112 is equal to the sum of the height of the second cavity 114 and the design floating stroke of the blind-mate A connector 106.

[0030] Embodiment 2: Based on the structure of Embodiment 1, the float 108 is divided into three sections, namely the end section 109, the middle section 110 and the tail section 111. A cylindrical first cavity 113 is opened between the end section 109 and the middle section 110, and the inner diameter of the first cavity 113 is larger than the inner diameter of the core body 115; the second cavity 114 is located in the tail section 111, and the inner diameter of the second cavity 114 is larger than the outer diameter of the elastic member 112, and the elastic member 112 is installed in the second cavity 114.

[0031] The load plate 1 further includes: a plurality of positioning pins 105 , which are arranged on both sides of the load plate 1 .

[0032] The fastening device of the corresponding design load plate 1 is combined with Figure 3-4 Understand, the figure marked as fastening mechanism 3, Figure 4The left slider 303 or the right slider 309 may be used; it includes: a linear motor 301, a left slider 303, a first connecting rod 304, a second connecting rod 305, a third connecting rod 306, a fourth connecting rod 307, a fifth connecting rod 308 and a right slider 309, the linear motor 301 is connected to the first connecting rod 304 through the left slider 303, the first connecting rod 304 is connected to the third connecting rod 306 through the second connecting rod 305, the third connecting rod 306 is connected to the fifth connecting rod 308 through the fourth connecting rod 307, the right slider 309 is installed at the end of the fifth connecting rod 308, the travel directions of the left slider 303 and the right slider 309 are parallel and opposite, the left slider 303 and the right slider 309 are provided with a slide groove 312 on the relative inner sides, the slide groove 312 includes a vertical end 313 and an oblique section 314 which are connected, the vertical end 313 is open above, and the oblique section 314 on the left slider 303 and the right slider 309 are in opposite directions.

[0033] Instructions for use: The load plate 1 is placed flat, and the positioning pins 105 on both sides are placed into the corresponding open vertical ends 313 of the slide grooves 312, and the linear motor 301 is started. Under the action of the linear motor 301, the left slider 303, the first connecting rod 304, the second connecting rod 305, the third connecting rod 306, the fourth connecting rod 307, the fifth connecting rod 308 and the right slider 309 move in sequence, wherein the second connecting rod 305 and the fourth connecting rod 307 rotate, and the left slider 303 and the right slider 309 move in parallel and opposite directions. , the moving speed and distance are the same, each inclined section 314 moves relative to the positioning pin 105 inside it, the parallel movement of the inclined section 314 is manifested as the forward and backward movement of the left slider 303 and the right slider 309, and the vertical upward and downward movement caused by the inclination of the inclined section 314 is manifested as the upward and downward movement of the positioning pin 105. When the load plate 1 is displaced downward, the load plate 1 is tightened, and the blind-matching A connector 106 is compressed downward and the connection is firm; when the load plate 1 is displaced upward, the load plate 1 is loosened. Moreover, the speed and distance of the movement of the left slider 303 and the right slider 309 are the same, so that the load plate 1 can always be kept flat without offset, and multiple blind-matching A connectors 106 are also compressed or released synchronously, and the compression amount or elongation amount is the same each time, and the compression amount is calculated, so that multiple channels can be plugged and unplugged at the same time, and the connection is accurate, and it is not easy to damage the connection device. The compression amount is the amount of downward movement caused by the angle between the inclined section 314 and the horizontal direction when the inclined section 314 in the slide 312 moves in the horizontal direction. It can be understood by analogy with the slope height to ensure that the blind-mate A connector 106 is accurately connected without being damaged. The compression amount during use is equal to the designed floating stroke of the blind-mate A connector 106, such as 3-5mm. Multiple blind-mate A connectors 106 with a frequency of up to 44GHz are designed on the load board 1 to provide the test frequency, test channel and test function of the load board 1; the floating stroke of the blind-mate A connector 106 is designed, and the entire load board 1 moves downward synchronously when the fastening mechanism 3 is fastened, and multiple channels are accurately docked, which improves the test efficiency and test speed of RF integrated circuits during batch and high-frequency testing.

[0034] In addition, a fool-proof design can be implemented, where the positioning pin 105 and the vertical end 313 of the slide slot 312 have different hole diameters and an asymmetric layout, which can effectively prevent the load plate 1 from being reversely installed.

[0035] Embodiment 3: Based on the structure of Embodiment 2, an analog connection area 102 and a digital connection area 103 are further provided on the load board 1 .

[0036] Combination Figure 5It is understood that the fastening mechanism 3 is installed on the test machine 2, and the fastening mechanism 3 locks the load board 1, and the load board 1 leads the test resources to the device under test for testing. The test machine 2 is provided with a radio frequency test port area 201 and a multifunctional connection area 202, which correspond to the high-frequency blind-mate connector area 101 and the analog connection area 102 and the digital connection area 103 on the load board 1. The radio frequency test port area 201 is provided with a blind-mate B connector arranged corresponding to the load board 1, and the blind-mate A connector 106 is connected to the blind-mate B connector for transmission of radio frequency signals; there is also a port connection between the multifunctional connection area 202 and the analog connection area 102 and the digital connection area 103. The linear motor 301 is fixedly mounted on the test machine 2. The test machine 2 is provided with parallel guide rails. The left slider 303 and the right slider 309 are respectively slidably mounted in the parallel linear guide rails. The center line of the linear guide rail matched with the left slider 303 is colinear with the axis of the motor telescopic rod 302 of the linear motor 301. In this way, the travel direction of the left slider 303 and the right slider 309 is parallel to the output direction of the linear motor 301, and the moving direction of the third connecting rod 306 is perpendicular to the output direction of the linear motor 301. It should be noted that Figure 3 is a schematic diagram of the fastening mechanism principle. Figure 5 In application, the left slider 303 and the right slider 309 are designed as a larger shell structure, mainly to adapt to the size of the load plate 1 and to wrap the fastening mechanism 3, which is safer to use.

[0037] A proximity switch 310 is fixedly mounted on the right slider 309, and a limit sensing block 311 is mounted on the test platform 2 at the limit position of the right slider 309. When the proximity switch 310 approaches the limit sensing block 311, a control signal is triggered, and the linear motor 301 stops moving and is locked.

[0038] The second connecting rod 305 and the fourth connecting rod 307 are both in an "L" structure, where both sides of the "L" structure are equal in length and the end connections are both rotationally connected. Figure 3 It can be understood that this figure can be understood as the relative position relationship of each component in the locked state, and the working length of the combination of the hypotenuse of the "L" structure in the second connecting rod 305 and the third connecting rod 306 is equal to the distance between the two parallel linear guide rails.

[0039] Embodiment 4: Based on the structure of embodiment 3, the load plate 1 includes more than two positioning holes 104, which can be arranged on the diagonal line. Correspondingly, a conical positioning column is arranged at the corresponding position on the test machine 2. This facilitates the positioning and installation of the load plate 1, and can limit the load plate 1 to only move up and down.

[0040] In addition, a fool-proof design can be performed, where the positioning holes 104 and the positioning posts have different apertures and an asymmetrical layout to satisfy a one-to-one correspondence, thereby facilitating the correspondence of the positions of the various port areas.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A high frequency load board suitable for a radio frequency integrated circuit tester, characterized in that: include: A high-frequency blind-mate connector area (101) for radio frequency signal transmission, wherein a plurality of blind-mate A connectors (106) are installed in the high-frequency blind-mate connector area (101); in the blind-mate A connector (106), a float (108) is located in a connector shell (107), an elastic member (112) is installed between the float (108) and the connector shell (107), a core (115) passes through the middle of the connector shell (107) and the float (108), and a floating head (116) is fixedly installed on the outer side of the core (115); a columnar second cavity (114) is opened in the middle of the side of the float (108) away from the floating head (116), and the initial length of the elastic member (112) is equal to the sum of the height of the second cavity (114) and the designed floating stroke of the blind-mate A connector (106).

2. The high-frequency load board suitable for a radio frequency integrated circuit tester according to claim 1, characterized in that: Also includes: A plurality of positioning pins (105), wherein the positioning pins (105) are arranged on both sides of the load plate (1).

3. The high-frequency load board suitable for a radio frequency integrated circuit tester according to claim 2, characterized in that: Also includes: Two or more positioning holes (104).

4. The high-frequency load board suitable for a radio frequency integrated circuit tester according to claim 2, characterized in that: An analog connection area (102) and a digital connection area (103) are also provided on the load board (1).

5. A high frequency load plate fastening device, characterized in that: include: A linear motor (301), a left slider (303), a first connecting rod (304), a second connecting rod (305), a third connecting rod (306), a fourth connecting rod (307), a fifth connecting rod (308) and a right slider (309), wherein the linear motor (301) is connected to the first connecting rod (304) via the left slider (303), the first connecting rod (304) is connected to the third connecting rod (306) via the second connecting rod (305), and the third connecting rod (306) is connected to the right slider (309). ) is connected to a fifth connecting rod (308) through a fourth connecting rod (307), a right slider (309) is installed at the end of the fifth connecting rod (308), the travel directions of the left slider (303) and the right slider (309) are parallel and opposite, and a slide groove (312) is opened on the relative inner sides of the left slider (303) and the right slider (309), and the slide groove (312) includes a vertical end (313) and an inclined section (314) that are connected, and the top of the vertical end (313) is open.

6. The high frequency load plate fastening device according to claim 5, characterized in that: The travel directions of the left slider (303) and the right slider (309) are parallel to the output direction of the linear motor (301).

7. The high frequency load plate fastening device according to claim 6, characterized in that: The second connecting rod (305) and the fourth connecting rod (307) are both in an "L" structure of equal length, and the end connection method is a rotation connection.

8. The high-frequency load plate fastening device according to claim 7, characterized in that: The high-frequency load board fastening device described in claims 5 to 7 is installed on a test machine (2).

9. The high-frequency load plate fastening device according to claim 8, characterized in that: A proximity switch (310) is fixedly mounted on the right slider (309), and a limit sensing block (311) is mounted on the test machine (2) at a position corresponding to the limit position of movement of the right slider (309).

10. The high frequency load plate fastening device according to claim 8, characterized in that: The linear motor (301) is fixedly mounted on the test machine (2). The test machine (2) is provided with parallel guide rails. The left slider (303) and the right slider (309) are respectively slidably mounted in the parallel linear guide rails.

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