Highly consistent surface mount circulator

Abstract

The utility model discloses a kind of high-consistency surface-mounted circulator, including cavity, pin, magnet, dielectric sleeve assembly, uniform magnetic sheet, substrate, center conductor, ground plate, cover plate, dielectric sleeve assembly is set in cavity interior, pin passes through dielectric sleeve assembly and center conductor, in cavity from below to above in turn for magnet, dielectric sleeve assembly, uniform magnetic sheet, substrate, center conductor, substrate, uniform magnetic sheet, magnet, ground plate, cover plate is set in cavity top portion.The utility model can effectively reduce the degree of freedom of each component in circulator, especially the degree of freedom between substrate and center conductor, to improve the electrical performance consistency of circulator, and then improve the qualified rate in production process.

Description

Technical Field

[0001] This utility model relates to the field of microwave components, and in particular to a highly consistent surface-mount circulator. Background Technology

[0002] Existing surface-mount circulators include a cavity, pins, dielectric sleeve, two magnets, two uniform magnets, two substrates, a center conductor, a ground plane, a temperature compensation plate, and a cover plate; a typical surface-mount circulator uses, for example... Figure 1 and Figure 2 The design shown... Due to the influence of component tolerances, the concentricity of internal parts is usually difficult to guarantee. Figure 3 This is a typical schematic diagram of the upper and lower substrates being eccentric.

[0003] Existing surface-mount circulators have the following problems:

[0004] 1. Existing circulator assemblies are usually achieved by stacking components, i.e., clearance fit.

[0005] 2. Due to the tolerances of each component, the clearance fit assembly method will introduce numerous component eccentricities. If the component assembly eccentricity is too large, it will lead to poor consistency at the product ends, thereby reducing the product qualification rate. Utility Model Content

[0006] The purpose of this invention is to design a highly consistent surface-mount circulator to solve the above problems.

[0007] This utility model achieves the above objectives through the following technical solutions:

[0008] This utility model provides a highly consistent surface-mount circulator, including a cavity, a pin, a magnet, a dielectric sleeve assembly, a uniform magnetic sheet, a substrate, a center conductor, a ground plane, and a cover plate. The dielectric sleeve assembly is disposed inside the cavity, and the pin passes through the dielectric sleeve assembly and the center conductor. Inside the cavity, from bottom to top, the components are: magnet, dielectric sleeve assembly, uniform magnetic sheet, substrate, center conductor, substrate, uniform magnetic sheet, magnet, and ground plane. The cover plate is disposed on the top of the cavity.

[0009] As a preferred embodiment of this invention, the dielectric sleeve assembly includes a dielectric sleeve and a substrate limiting portion. The pin passes through the dielectric sleeve and the center conductor. The substrate limiting portion is used to restrict the movement of the upper and lower substrates, so as to improve their concentricity with the center conductor.

[0010] As a preferred embodiment of this invention, the dielectric sleeve and the substrate limiting part are integrally formed or detachably connected.

[0011] As a preferred embodiment of this utility model, there are three substrate limiting parts, which correspond to the three pins of the center conductor respectively. The substrate limiting parts are stepped, and the lower step has a hole for the pin to pass through.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The interference fit dielectric sleeve assembly of this utility model can effectively reduce the degree of freedom of each component in the circulator, especially the degree of freedom between the substrate and the center conductor, thereby improving the consistency of the electrical performance of the circulator and thus improving the pass rate in the production process.

[0014] 2. This patent is not only applicable to 7mm circulator shapes, but can also be extended to other shapes, which helps to improve the consistency of other shapes and thus improve the production qualification rate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a typical circulator component assembly.

[0016] Figure 2 This is a schematic diagram of a typical circulator.

[0017] Figure 3 This is a typical schematic diagram of eccentric upper and lower substrates.

[0018] Figure 4 This is the distribution curve of the cavity's internal diameter.

[0019] Figure 5 This is the distribution curve of the outer diameter of the medium sleeve.

[0020] Figure 6 This is the pin position distribution curve.

[0021] Figure 7 This is the substrate outer diameter distribution curve.

[0022] Figure 8 This is the pin size distribution curve.

[0023] Figure 9 The center conductor aperture distribution curve,

[0024] Figure 10 The curve showing the size distribution of the central conductor aperture.

[0025] Figure 11 This is a schematic diagram illustrating the assembly error between the cavity and the substrate.

[0026] Figure 12 This is a circle plot showing the probability density of hitting a target.

[0027] Figure 13 The two-dimensional normal distribution curve for the cavity and substrate assembly.

[0028] Figure 14 The substrate eccentricity (Δ1) distribution curve is shown.

[0029] Figure 15The distribution curve of the eccentricity (Δ2) of the medium sleeve is shown.

[0030] Figure 16 The distribution curve of the eccentricity (Δ3) of the center conductor hole position.

[0031] Figure 17 The distribution curve of the eccentricity (Δ4) of the central conductor aperture size.

[0032] Figure 18 The eccentricity (Δ5) distribution curve of the center conductor and cavity assembly.

[0033] Figure 19 Substitute the eccentricity simulation results into the HFSS of a typical circulator.

[0034] Figure 20 This is a typical curve for non-conforming products.

[0035] Figure 21 This is an exploded view of the circulator of this utility model.

[0036] Figure 22 This is an assembly drawing of the circulator of this utility model.

[0037] Figure 23 This is a schematic diagram of the dielectric sleeve of a typical circulator.

[0038] Figure 24 This is a schematic diagram of the medium sleeve of this utility model.

[0039] Figure 25 This is a schematic diagram of the substrate assembly of this utility model.

[0040] Figure 26 Substituting the eccentricity simulation results into the HFSS of this utility model,

[0041] Figure 27 This is the product test curve for this utility model.

[0042] In the figure: 1-cavity, 2-magnet, 3-dielectric sleeve, 4-pin, 5-magnetic plate, 6-substrate, 7-center conductor, 8-ground plane, 9-cover plate, 10-dielectric sleeve assembly, 11-substrate limiting part. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0048] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0050] In a surface mount circulator, the components are assembled by stacking. Inevitably, there are tolerances in the dimensions of each component during the machining process. The machining tolerance values ​​of each component usually conform to a normal distribution, i.e., equation (1). .

[0051] This leads to discrepancies between the product's electrical performance and the ideal design. The dimensions of the cavity, substrate, center conductor, and pin dielectric sleeve are shown in [reference needed]. Figure 4-10And Table 1. These four components have internal assembly tolerances, involving the cavity inner diameter + dielectric sleeve outer diameter, the cavity inner diameter + substrate outer diameter, and the assembly of the center conductor and the insertion pin dielectric sleeve. Considering that the substrate outer diameter is R1 = 2.995mm and the cavity inner diameter is R2 = 3.015mm, the assembly error between the cavity and the substrate (substrate eccentricity) is Δ1 = R2 - R1. Figure 11 As shown. The substrate eccentricity Δ1 at this point is analogous to the probability of hitting a target, as... Figure 12 As shown, the distribution is random within the radius R2-R1, and the distribution conforms to a two-dimensional normal distribution, as follows. Figure 13 As shown. Based on the normal distribution theory, we can obtain Δ1≤0.03mm=97.2%, Δ1≤0.02mm=26.5%, μ1=0.0225, σ1=0.004, and the distribution curve is shown below. Figure 14 As shown. Similarly, the distribution of the eccentricity between the inner diameter of the cavity and the outer diameter of the dielectric sleeve (dielectric sleeve eccentricity) Δ2, the eccentricity of the central conductor hole position Δ3, and the eccentricity of the central conductor hole size Δ4 can be obtained, as follows. Figure 15-17 As shown. For product consistency, the concentricity of the substrate, cavity, and center conductor has the greatest impact. The assembly error between the center conductor and the cavity (eccentricity of the center conductor and cavity assembly) Δ5 = Δ3 + Δ4. The distribution of the eccentricity Δ5 between the center conductor and the cavity assembly is shown in [the diagram]. Figure 18 The factors that have the greatest impact on product consistency are substrate eccentricity Δ1 and center conductor / cavity assembly eccentricity Δ5. Substituting the values ​​of Δ1 and Δ5 into the HFSS simulation, the simulation results... Figure 19 It can be seen that when the eccentricity Δ5 between the center conductor and the cavity is ≥0.046mm or the substrate eccentricity Δ1 is ≥0.03mm, the product performance is unqualified. The probability of Δ5 ≥0.046mm eccentricity between the center conductor and the cavity is 42%, and the probability of Δ1 ≥0.03mm eccentricity is 0.3%, with an overall failure rate of 42%. Overall, the factor with the greatest impact on the consistency of the circulator is the eccentricity Δ5 between the center conductor and the cavity. Typical measured performance results of devices with poor consistency are as follows... Figure 20 As shown.

[0052] 1 Cavity inner diameter 6.01-6.06 Figure 4 2 outer diameter of the medium sleeve 5.95-5.99 Figure 5 3 Pin position 7.00-7.10 Figure 6 4 substrate outer diameter 5.98-6.00 Figure 7 5 outer diameter of the pin 0.25-0.30 Figure 8 6 Central conductor hole position 7.03-7.07 Figure 9 7 Center hole size 0.34-0.39 Figure 10

[0053] Table 1 Design Dimensions of Each Material

[0054] An assembly drawing of a highly consistent circulator according to an embodiment of the present invention is shown below. Figure 21 , Figure 22 .

[0055] As attached Figure 21-22As shown in Figures 24-27, this embodiment provides a highly consistent surface-mount circulator, including a cavity 1, pins 4, magnets 2, a dielectric sleeve assembly 10, a uniform magnetic sheet 5, a substrate 6, a center conductor 7, a ground plane 8, and a cover plate 9. The dielectric sleeve assembly 10 is disposed inside the cavity 1, and the pins 4 pass through the dielectric sleeve assembly and the center conductor 7. Inside the cavity 1, from bottom to top, the components are magnets 2, dielectric sleeve assembly, uniform magnetic sheet 5, substrate 6, center conductor 7, substrate 6, uniform magnetic sheet 5, magnets 2, and ground plane 8. The cover plate 9 is disposed on the top of the cavity 1.

[0056] As a preferred embodiment of the present invention, the dielectric sleeve assembly 10 includes a dielectric sleeve 3 and a substrate limiting portion 11. The pin 4 passes through the dielectric sleeve 3 and the center conductor 7. The substrate limiting portion 11 is used to restrict the movement of the upper and lower substrates 6, so that their concentricity with the center conductor 7 is better.

[0057] As a preferred embodiment of the present invention, the medium sleeve 3 and the substrate limiting part 11 are integrally cast or separately cast.

[0058] As a preferred embodiment of this utility model, there are three substrate limiting portions 11, which correspond to the three pins of the center conductor 7 respectively. The substrate limiting portions 11 are stepped, and the lower step has a hole for the pin to pass through.

[0059] The features of the circulator of this utility model are as follows:

[0060] 1. Reduces the degree of freedom of components, compared to traditional pin-mounted dielectric sleeves ( Figure 23 In this embodiment of the invention, an interference fit dielectric sleeve assembly is used. Figure 24 The addition of a substrate limiting section reduces the movement of the upper and lower substrates, ensuring the substrate and dielectric sleeve are concentric. This improves the concentricity between the substrate and the center conductor, effectively reducing the eccentricity Δ5 between the substrate and the center conductor, making Δ5=0. The assembly diagram is shown below. Figure 25 As shown.

[0061] 2. By reducing the degrees of freedom of the components, only the substrate eccentricity Δ1 and the dielectric sleeve eccentricity Δ2 remain. At this point, the substrate and dielectric sleeve are concentric, therefore the substrate eccentricity Δ1 and the dielectric sleeve eccentricity Δ2 are the same. Thus, only a two-dimensional normal distribution remains. Substituting this into the HFSS model for frequency sweep analysis yields the following results: Figure 26 At this point, the probability of eccentricity Δ5 ≥ 0.046 mm between the center conductor and the cavity is 0%, the probability of eccentricity Δ1 of the substrate and eccentricity Δ2 of the dielectric sleeve is 0.3%, and the overall failure rate is 0.3%, which is a significant improvement over the previous results.

[0062] 3. In actual production, using this interference fit dielectric sleeve assembly, the product qualification rate reached 98.1%, as shown in the typical curve. Figure 27 As shown. Impedance CPK > 1.67, the process capability is sufficient and suitable for batch production requirements.

[0063] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A highly consistent surface-mount circulator, characterized in that, The device includes a cavity (1), a pin (4), two magnets (2), a dielectric sleeve assembly (10), two uniform magnetic sheets (5), two substrates (6), a center conductor (7), a ground plane (8), and a cover plate (9). The dielectric sleeve assembly (10) is located inside the cavity (1). The pin (4) passes through the dielectric sleeve assembly (10) and the center conductor (7). Inside the cavity (1), from bottom to top, the components are magnets (2), dielectric sleeve assembly (10), uniform magnetic sheets (5), substrates (6), center conductors (7), substrates (6), uniform magnetic sheets (5), magnets (2), and ground plane (8). The cover plate (9) is located on the top of the cavity (1).

2. The highly consistent surface-mount circulator according to claim 1, characterized in that, The dielectric sleeve assembly (10) includes a dielectric sleeve (3) and a substrate limiting portion (11). A pin (4) passes through the dielectric sleeve (3) and the center conductor (7). The substrate limiting portion (11) is used to restrict the movement of the upper and lower substrates (6).

3. A highly consistent surface-mount circulator according to claim 2, characterized in that, The medium sleeve (3) and the substrate limiting part (11) are integrally formed.

4. A highly consistent surface-mount circulator according to claim 2, characterized in that, The medium sleeve (3) and the substrate limiting part (11) are detachably connected.

5. A highly consistent surface-mount circulator according to claim 3 or 4, characterized in that, There are three substrate limiting portions (11), which correspond to the three pins of the center conductor (7).

6. A highly consistent surface-mount circulator according to claim 5, characterized in that, The substrate limiting part (11) is stepped, and the lower step has a hole for the insertion pin (4) to pass through.

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