A debugging fixture for radio frequency amplifier

Abstract

The present invention provides a debugging fixture for a radio frequency amplifier, which belongs to the technical field of functional chip testing, and includes a base, a bearing structure, an adjustment structure, and an elastic mounting structure. A first mounting groove and two slide grooves are provided on the base, a radio frequency circuit board and a connection terminal are provided on the bearing structure, the power amplifier chip to be tested is connected to the radio frequency circuit board, and both ends of the adjustment structure are respectively slidably connected in the two slide grooves, and there is an installation space between the adjustment structure and the base; the elastic mounting structure is arranged in the installation space; the elastic mounting structure includes an elastic component and a mounting block, the mounting block is located above the radio frequency circuit board, and a second mounting groove is provided at the lower end. The debugging fixture for the radio frequency amplifier provided by the present invention does not need to weld discrete devices, and the discrete devices are connected to the functional chip to be tested under the action of the elastic component, so that no loss is caused to the functional chip to be tested, and the reliability is high; and the workload is also reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of power chip testing, and more specifically, relates to a debugging fixture for a radio frequency amplifier. Background Art

[0002] RF amplifier MMIC (hereinafter referred to as power amplifier chip) is widely used in communications, radar, and medical equipment, and plays a key role in the transmission signal link. Power amplifier chips can be divided into two structures: external matching and full matching. In the low frequency band, external matching power amplifiers have great advantages of high power, high efficiency, and reconfigurability, which are specifically reflected in: through the reasonable design of output external matching, harmonic energy can be effectively controlled and additional efficiency can be improved; by optimizing the external gate-drain feedback capacitor and resistor, the circuit Q value can be reduced to increase the bandwidth; by optimizing the external resistance of the input circuit, the circuit Mu value can be increased to improve the circuit stability; by optimizing the external bias circuit, the bias point (current) of each level of the amplifier can be improved, so that the amplifiers at each level can achieve nonlinear complementary cancellation effect and improve the linearity of the circuit.

[0003] While external matching amplifier chips have these advantages, their biggest problem is that the debugging work is complicated. Various discrete linear devices (resistors, capacitors, inductors) need to be placed in different positions according to the initial design values. The number, final value, installation position, etc. of these devices need to be repeatedly corrected according to the actual test results during the debugging stage. With the increase in the number of components, the possible combinations of permutations have greatly increased, which undoubtedly brings a lot of debugging work to designers and users. In addition, since conventional PCB boards only support the reliability of welding within 3 times, some special high-frequency boards can no longer guarantee reliability after welding 1-2 times, so it is impossible to rely on repeated welding of discrete devices with different values. Summary of the invention

[0004] The purpose of the present invention is to provide a debugging fixture for a radio frequency amplifier to solve the technical problems in the prior art that repeated welding of discrete components leads to damage to the power amplifier chip, reduced reliability, and a large workload.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a debugging fixture for a radio frequency amplifier, comprising:

[0006] The base has a first mounting groove and two slide grooves at the upper end, and the two slide grooves are respectively located on both sides of the first mounting groove;

[0007] A bearing structure is installed in the first installation slot; a radio frequency circuit board and connection terminals are arranged on the bearing structure; and the power amplifier chip to be tested is connected to the radio frequency circuit board;

[0008] An adjusting structure is installed above the base, and two ends of the adjusting structure are respectively slidably connected to the two slide grooves; there is an installation space between the adjusting structure and the base;

[0009] An elastic mounting structure is arranged in the mounting space; the elastic mounting structure includes an elastic component connected to the adjustment structure and a mounting block located at the lower end of the elastic component, the elastic component has the freedom to move up and down, and is used to apply a force to the mounting block; the mounting block is located above the RF circuit board, and a second mounting groove for mounting discrete components is provided at the lower end.

[0010] In a possible implementation, the elastic component includes:

[0011] The support block has a receiving groove at the upper end; the mounting block is arranged on the lower end surface of the support block;

[0012] An elastic member is disposed in the receiving groove; the length of the elastic member is greater than the depth of the receiving groove, and the upper end of the elastic member is connected to the adjustment structure.

[0013] In a possible implementation, a mounting hole is provided on the adjustment structure, and a handle slidably connected to the mounting hole is provided on the support block, and an upper end of the handle is located above the adjustment structure.

[0014] In a possible implementation, a guide groove is provided on the inner wall of the installation space, and a sliding block slidably matched with the guide groove is provided at the end of the support block.

[0015] In a possible implementation, there are a plurality of accommodating grooves which are evenly distributed along the length direction of the supporting block; and there are a plurality of elastic members which are respectively disposed in each of the accommodating grooves.

[0016] In a possible implementation manner, centers of the handle, the support block, and the mounting block are collinear.

[0017] In a possible implementation, the adjustment structure includes a cross beam and two vertical rods, the two vertical rods are respectively arranged at both ends of the cross beam, and the lower ends are respectively slidably connected in the two slide grooves; the installation space is between the cross beam and the two vertical rods, and the elastic installation structure is connected to the cross beam.

[0018] In a possible implementation, the sliding groove is a T-shaped groove, and the lower end of the vertical rod is a T-shaped block that slides with the T-shaped groove.

[0019] In a possible implementation, positioning plates are provided on both sides of the upper end of the supporting structure, and the radio frequency circuit board is arranged between the two positioning plates.

[0020] In a possible implementation, a heat dissipation fin is provided at the lower end of the base.

[0021] The debugging fixture for the radio frequency amplifier provided by the present invention has the beneficial effect that, compared with the prior art, when the debugging fixture for the radio frequency amplifier of the present invention is used, the functional chip to be tested is bonded or sintered on the radio frequency circuit board of the bearing structure, and installed together in the first installation groove of the base, the adjustment structure drives the elastic installation structure to slide according to the test position control, and the adjustment structure is slidably installed in the two first installation grooves of the base, and the staff installs and embeds the discrete device in the second installation groove at the lower end of the mounting block, and connects the discrete device to the functional chip to be tested under the action of the elastic component, and then connects to the test system through the connecting terminal; in this way, there is no need to weld the discrete device, and the discrete device is connected to the functional chip to be tested under the action of the elastic component, so that no loss will be caused to the functional chip to be tested, and the reliability is high; at the same time, the workload is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic diagram of the structure of a debugging fixture for a radio frequency amplifier provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of the adjustment structure provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the structure of an elastic mounting structure provided by an embodiment of the present invention;

[0026] Figure 4 A schematic structural diagram of a bearing structure provided in an embodiment of the present invention.

[0027] Among them, the reference numerals in the figure are:

[0028] 1. Base; 11. First mounting groove; 12. Slide groove; 13. Heat dissipation fin; 2. Bearing structure; 21. RF circuit board; 22. Connecting terminal; 23. Positioning plate; 3. Adjustment structure; 31. Installation space; 32. Installation hole; 33. Guide groove; 34. Crossbeam; 35. Vertical rod; 36. T-block; 4. Elastic mounting structure; 41. Elastic component; 42. Mounting block; 421. Second mounting groove; 43. Support block; 431. Accommodating groove; 44. Elastic member; 45. Handle; 46. Slider; 5. Discrete device. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] See also Figures 1 to 4, the debugging fixture for the radio frequency amplifier provided by the present invention is now described. A debugging fixture for a radio frequency amplifier includes a base 1, a bearing structure 2, an adjustment structure 3 and an elastic mounting structure 4. The upper end of the base 1 is provided with a first mounting groove 11 and two slide grooves 12, and the two slide grooves 12 are respectively located on both sides of the first mounting groove 11; the bearing structure 2 is installed in the first mounting groove 11; a radio frequency circuit board 21 and a connecting terminal 22 are provided on the bearing structure 2; the power amplifier chip to be tested is connected to the radio frequency circuit board 21; the adjustment structure 3 is installed above the base 1, and the two ends are respectively slidably connected in the two slide grooves 12; there is an installation space 31 between the adjustment structure 3 and the base 1; the elastic mounting structure 4 is arranged in the installation space 31; the elastic mounting structure 4 includes an elastic component 41 connected to the adjustment structure 3 and a mounting block 42 located at the lower end of the elastic component 41, the elastic component 41 has the freedom to move up and down, and is used to apply a force on the mounting block 42; the mounting block 42 is located above the radio frequency circuit board 21, and a second mounting groove 421 for mounting discrete devices is provided at the lower end.

[0034] Compared with the prior art, the debugging fixture for the radio frequency amplifier provided by the present invention is used. When the functional chip to be tested is bonded or sintered on the radio frequency circuit board 21 of the bearing structure 2, and installed together in the first installation groove 11 of the base 1. The adjustment structure 3 drives the elastic installation structure 4 to slide according to the test position control, and the adjustment structure 3 is slidably installed in the two first installation grooves 11 of the base 1. The staff installs and embeds the discrete device 5 in the second installation groove 421 at the lower end of the mounting block 42, and connects the discrete device 5 with the functional chip to be tested under the action of the elastic component 41, and then connects it to the test system through the connecting terminal 22; in this way, there is no need to weld the discrete device 5, and the discrete device 5 is connected to the functional chip to be tested under the action of the elastic component 41, so that no loss will be caused to the functional chip to be tested, and the reliability is high; at the same time, the workload is also reduced.

[0035] The bearing structure 2 is arranged to be slidably connected in the first installation groove 11 . After the functional chip to be tested is installed and debugged, the bearing structure 2 can be removed and used alone.

[0036] See also Figures 1 to 3As a specific embodiment of the debugging fixture for the radio frequency amplifier provided by the present invention, the elastic component 41 includes a supporting block 43 and an elastic member 44. The upper end of the supporting block 43 is provided with a receiving groove 431; the mounting block 42 is arranged on the lower end surface of the supporting block 43; the elastic member 44 is arranged in the receiving groove 431; the length of the elastic member 44 is greater than the depth of the receiving groove 431, and the upper end of the elastic member 44 is connected to the adjustment structure 3; the supporting block 43 is arranged in the installation space 31, and is located between the adjustment structure 3 and the functional chip to be tested; the elastic member 44 is installed in the receiving groove 431, and the upper end of the elastic member 44 is connected to the adjustment structure 3 Then, the elastic member 44 is in a compressed state, so the restoring force of the elastic member 44 drives the support block 43 to squeeze on the functional chip to be tested; when the discrete device 5 needs to be installed, the staff drives the support block 43 and compresses the elastic member 44 to move upward, so that the installation block 42 is away from the functional chip to be tested, and then the discrete device 5 is installed in the receiving groove 431 at the lower end of the installation block 42, and then the support block 43 is released, and the support block 43, the installation block 42 and the discrete device 5 are driven to move downward under the action of the elastic member 44, and are firmly pressed on the functional chip to be tested, so that the discrete device 5 is connected to the functional chip to be tested. The elastic member 44 can be a spring, and the spring is always in a compressed state.

[0037] See also Figure 1 and Figure 2 As a specific embodiment of the debugging fixture for the radio frequency amplifier provided by the present invention, the adjustment structure 3 is provided with a mounting hole 32, and the support block 43 is provided with a handle 45 slidably connected to the mounting hole 32, and the upper end of the handle 45 is located above the adjustment structure 3; the handle 45 is arranged on the upper end surface of the support block 43, and the upper end of the handle 45 passes through the mounting hole 32 and is located above the adjustment structure 3. When driving to place the discrete device 5, the staff holds the handle 45 and pulls the handle 45 upward with force, so that the support block 43 overcomes the elastic force of the elastic member 44, and the mounting block 42 is away from the functional chip to be tested, and then the discrete device is installed; in this way, the staff can operate easily and labor-saving, and also improve work efficiency; at the same time, the handle 45 is installed in coordination with the mounting hole 32, so that the handle 45 moves up and down along the mounting hole 32, so as to guide the movement of the support block 43. A protrusion can be installed on the outer side of the top of the handle 45, which can prevent the handle 45 from completely entering the mounting hole 32 and facilitate the staff to apply force.

[0038] See also Figure 1 and Figure 2As a specific embodiment of the debugging fixture for the radio frequency amplifier provided by the present invention, a guide groove 33 is provided on the inner wall of the installation space 31, and a slider 46 slidably matched with the guide groove 33 is provided at the end of the support block 43; that is, the guide grooves 33 are provided on the inner walls of the opposite sides of the adjustment structure 3, and after the support block 43 is installed in the installation space 31, the sliders 46 on both sides of the adjustment structure 3 are slidably connected in the guide grooves 33, so that in the process of controlling the up and down movement of the support block 43, the support block 43 can move smoothly and accurately under the action of the slider 46, and it is not easy to get stuck. The slider 46 is integrally formed with the support block 43.

[0039] See also Figures 1 to 3 As a specific embodiment of the debugging fixture for the radio frequency amplifier provided by the present invention, there are multiple receiving grooves 431, which are evenly arranged along the length direction of the support block 43; there are multiple elastic members 44, which are respectively arranged in each receiving groove 431; multiple evenly arranged receiving grooves 431 are arranged, so that each receiving groove 431 is equipped with an elastic member 44, so that the support block 43 is subjected to a uniform and strong elastic restoring force, thereby tightly pressing the discrete device 5 on the functional chip to be tested. The debugging fixture for the radio frequency amplifier is more reliable and accurate during use.

[0040] See also Figures 1 to 3 As a specific embodiment of the debugging fixture for the radio frequency amplifier provided by the present invention, the centers of the handle 45, the support block 43 and the mounting block 42 are collinear, so that the handle 45 and the mounting block 42 are located at the center of the upper and lower ends of the support block 43. Whether the support block 43 is pulled upward by the handle 45 to move, or the discrete device 5 is installed in the receiving groove 431 of the mounting block 42 and pressed against the functional chip to be tested under the action of the elastic member 44, the support block 43 is subjected to uniform force and the up and down movement process is smooth; the discrete device 5 is also subjected to uniform force, thereby making the connection between the discrete device 5 and the functional chip to be tested more firm and reliable.

[0041] See also Figure 1 and Figure 2As a specific embodiment of the debugging fixture for the radio frequency amplifier provided by the present invention, the adjustment structure 3 includes a crossbeam 34 and two vertical rods 35, the two vertical rods 35 are respectively arranged at the two ends of the crossbeam 34, and the lower ends are respectively slidably connected in the two slide grooves 12; the crossbeam 34 and the two vertical rods 35 are between the installation space 31, and the elastic installation structure 4 is connected to the crossbeam 34; the crossbeam 34 and the two vertical rods 35 form a door-type structure, the crossbeam 34 is located above the base 1, and the two vertical rods 35 extend downward and slide with the two slide grooves 12 respectively, completing the connection between the adjustment structure 3 and the base 1. The installation space 31 is between the crossbeam 34 and the two vertical rods 35, and after the elastic installation structure 4 is installed in the installation space 31, the elastic installation structure 4 is connected to the crossbeam 34. When in use, the elastic mounting structure 4 is driven to move upward and away from the functional chip to be tested, and then the discrete device 5 is installed in the second mounting groove 421 at the lower end of the mounting block 42, and then the elastic mounting structure 4 is released, and moves downward under its own elastic force, and the discrete device 5 is pressed against the functional chip to be tested, and the discrete device 5 is connected to the power amplifier chip to be tested. The gate-type adjustment structure 3 is easy to install and has high stability.

[0042] See also Figure 1 and Figure 2 As a specific embodiment of the debugging fixture for the radio frequency amplifier provided by the present invention, the slide groove 12 is a T-slot, and the lower end of the vertical rod 35 is a T-block 36 that slides with the T-slot; the slide groove 12 is set as a T-slot, and the T-block 36 is installed at the lower end of the vertical rod 35. Through the sliding cooperation between the T-block 36 and the T-slot, the cross beam 34 and the two vertical rods 35 move more smoothly on the base 1, thereby completing the compression connection of the discrete device 5 at different positions of the functional chip to be tested. The connection method of the T-block 36 and the T-slot also prevents the cross beam 34 and the vertical rod 35 from overturning, and the movement is more reliable.

[0043] See also Figure 1 and Figure 4 As a specific embodiment of the debugging fixture for the RF amplifier provided by the present invention, positioning plates 23 are provided on both sides of the upper end of the bearing structure 2, and the RF circuit board 21 is arranged between the two positioning plates 23; by installing the positioning plates 23 on the bearing structure 2, the RF circuit board 21 and the power amplifier chip to be tested installed on the bearing structure 2 are limited, thereby improving the installation stability and reliability of both. And the connecting terminals 22 are two respectively installed on the outsides of the two positioning plates 23, and the connection between the test system and the connecting terminals 22 is realized by means of connecting wires. The test system includes a network analyzer, a power meter, a multi-channel regulated power supply, an attenuator, etc. The two positioning plates 23 are located on both sides of the upper end of the bearing structure 2, and the space of the bearing structure 2 is effectively utilized. The bearing structure 2 is a block with a certain thickness. The bearing structure 2 is installed in coordination with the first mounting groove 11.

[0044] See also Figure 1 As a specific embodiment of the debugging fixture for the radio frequency amplifier provided by the present invention, a heat dissipation fin 13 is provided at the lower end of the base 1; when testing the power amplifier chip to be tested, especially the high-power power amplifier chip to be tested will generate a large amount of heat energy. In order to ensure the accuracy and safety of the test work, a heat dissipation fin 13 is provided at the lower end of the base 1, thereby improving the heat dissipation effect of the base 1, so that a large amount of heat energy can be heat-exchanged with the outside through the heat dissipation fin 13. A plurality of heat dissipation fins 13 are arranged in parallel and evenly on the lower end surface of the base 1. The height of the heat dissipation fin 13 is equal to or slightly greater than the thickness of the base 1, so as to increase the heat dissipation surface of the heat dissipation fin 13.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A debugging fixture for a radio frequency amplifier, characterized in that: include: The base has a first mounting groove and two slide grooves at the upper end, and the two slide grooves are respectively located on both sides of the first mounting groove; A bearing structure is installed in the first installation slot; a radio frequency circuit board and connection terminals are arranged on the bearing structure; and the power amplifier chip to be tested is connected to the radio frequency circuit board; An adjusting structure is installed above the base, and two ends of the adjusting structure are respectively slidably connected to the two slide grooves; there is an installation space between the adjusting structure and the base; An elastic mounting structure is arranged in the mounting space; the elastic mounting structure includes an elastic component connected to the adjustment structure and a mounting block located at the lower end of the elastic component, the elastic component has the freedom to move up and down, and is used to apply a force to the mounting block; the mounting block is located above the RF circuit board, and a second mounting groove for mounting discrete components is provided at the lower end.

2. The debugging fixture for the radio frequency amplifier according to claim 1, characterized in that: The elastic component comprises: The support block has a receiving groove at the upper end; the mounting block is arranged on the lower end surface of the support block; An elastic member is disposed in the receiving groove; the length of the elastic member is greater than the depth of the receiving groove, and the upper end of the elastic member is connected to the adjustment structure.

3. The debugging fixture for the radio frequency amplifier according to claim 2, characterized in that: The adjusting structure is provided with a mounting hole, the supporting block is provided with a handle which is slidably connected to the mounting hole, and the upper end of the handle is located above the adjusting structure.

4. The debugging fixture for the radio frequency amplifier according to claim 3, characterized in that: A guide groove is provided on the inner wall of the installation space, and a sliding block which is slidably matched with the guide groove is provided at the end of the support block.

5. The debugging fixture for the radio frequency amplifier according to claim 3, characterized in that: There are a plurality of accommodating grooves, which are evenly distributed along the length direction of the supporting block; there are a plurality of elastic members, which are respectively arranged in each of the accommodating grooves.

6. The debugging fixture for the radio frequency amplifier according to claim 4, characterized in that: The centers of the handle, the support block and the mounting block are collinear.

7. The debugging fixture for the radio frequency amplifier according to claim 1, characterized in that: The adjustment structure includes a crossbeam and two vertical rods, the two vertical rods are respectively arranged at the two ends of the crossbeam, and the lower ends are respectively slidably connected in the two sliding grooves; the installation space is between the crossbeam and the two vertical rods, and the elastic installation structure is connected to the crossbeam.

8. The debugging fixture for the radio frequency amplifier according to claim 7, characterized in that: The slide groove is a T-shaped groove, and the lower end of the vertical rod is a T-shaped block that slides with the T-shaped groove.

9. The debugging fixture for the radio frequency amplifier according to claim 1, characterized in that: Positioning plates are provided on both sides of the upper end of the bearing structure, and the radio frequency circuit board is arranged between the two positioning plates.

10. The debugging fixture for the radio frequency amplifier according to claim 1, characterized in that: The lower end of the base is provided with heat dissipation fins.

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