Super-miniaturized high-efficiency surface-mounted isolator

Abstract

The utility model discloses a superminiature high-efficiency surface-mounted isolator, which comprises a lower dielectric ring (2), a lower gyromagnetic ferrite (3), an inner conductor (6), an upper dielectric ring (4), an upper gyromagnetic ferrite (5), an iron sheet (7), a samarium cobalt permanent magnet (8), a nickel sheet (9) and a cover plate (10) which are sequentially arranged in a cavity (1), the inner conductor (6) is provided with two branch leads (61) and a central lead (62), the end part of each branch lead (61) is provided with a convex rectangular structure (61a), the cavity (1) is provided with three ports corresponding to the leads, the rectangular structures (61a) are clamped into the ports at the two sides of the cavity (1) and are fixed through welding pins (11), and the central lead (62) is led out from a round hole (1a) of the cavity (1) and is connected with a radio frequency resistor (12). The utility model has the advantages of simple structure, high reliability, small size, good consistency, strong anti-magnetic interference capability, small loss, good heat dissipation performance and capability of batch production.

Description

Technical Field

[0001] This utility model relates to the field of isolator technology, and in particular to an ultra-miniaturized and high-efficiency surface-mount isolator. Background Technology

[0002] To overcome the shortcomings of embedded isolators, such as large size, unsuitability for surface mounting, and difficulty in microcircuit integration, a surface-mount isolator has emerged. For example, Chinese patent CN103022607A discloses a surface-mount ultra-miniaturized isolator, which is small in size and suitable for surface mounting technology. However, its overall structure is relatively simple. It is an early design product of our company, with a stable frequency range of 1605~1625MHz, which belongs to the mid-low frequency band. Its frequency parameters are relatively small, its applicable range is narrow, and the stability of its various performance characteristics is poor. Utility Model Content

[0003] The purpose of this invention is to solve the problems of low frequency, low stability and low reliability of existing surface-mount isolators, and to provide an ultra-miniature and high-efficiency surface-mount isolator that is not only simple in structure and highly reliable, but also smaller in size and more consistent. At the same time, it has strong anti-magnetic interference ability, low loss and good heat dissipation performance, and can be mass-produced.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An ultra-miniaturized high-efficiency surface-mount isolator includes a cavity. The bottom of the cavity is provided with a lower dielectric ring and a lower ferrite core nested together, as well as an upper dielectric ring and an upper ferrite core nested together. The upper and lower dielectric rings are respectively fitted into the corresponding upper and lower ferrite cores, and an inner conductor is sandwiched between the upper and lower sets of dielectric rings and ferrite cores.

[0006] An iron sheet, a samarium cobalt permanent magnet, a nickel sheet, and a cover plate are sequentially arranged on the upper rotating magnetic ferrite. The cover plate is fixed in the cavity by rotation.

[0007] The inner conductor has a three-pronged structure. There are branch leads and a center lead between two adjacent branches. There are two branch leads, which are symmetrically distributed with the axis of the center lead as the center line. The ends of the branch leads have protruding rectangular structures. There are three ports on the cavity corresponding to the leads. The rectangular structures are inserted into the ports on both sides of the cavity and fixed by soldering pins. The center lead is led out from the round hole of the cavity and connected to the radio frequency resistor.

[0008] Furthermore, the cavity is a cylindrical structure with a sealed lower end and an open upper end. The side wall of the cavity has two symmetrical vertical openings, and the bottom of the vertical openings has horizontal bosses with port slots. Each welding pin is inserted into a corresponding port slot.

[0009] Further, the cavity is made of easy cutting steel material and plated with silver on the surface, and a load step is arranged above the circular hole of the side wall of the cavity, and the radio frequency resistance is vertically welded on the load step to be connected with the lead of the inner conductor by welding.

[0010] Further, the radio frequency resistance is 20W load, small in volume, high in energy efficiency and good in stability.

[0011] Further, the inner conductor is made of 0.1mm thick copper foil and plated with silver on the surface, and a fixing hole is arranged at the center of the rectangular structure of the two branch leads, and the soldering needle is connected with the branch lead by penetrating through the fixing hole, and the center lead is led out and welded with the radio frequency resistance.

[0012] Further, the upper and lower spin magnetic ferrite are made of 0.55mm thick power-resistant material and are single-surface silver baked, and the silver baked surface of the lower spin magnetic ferrite faces downward and contacts the bottom of the inner cavity of the cavity, and the silver baked surface of the upper spin magnetic ferrite faces upward and contacts the iron sheet thereon.

[0013] Further, the upper and lower dielectric rings are made of polytetrafluoroethylene material.

[0014] Further, the nickel sheet is made of nickel alloy material, and a pair of protruding arc-shaped clamping ears are arranged at the outer edge of the nickel sheet, the arc-shaped clamping ears are arranged opposite to the vertical openings and extend out of the corresponding vertical openings, so as to serve as a clamping function, and the nickel sheet is used in two ways.

[0015] Further, the cover plate is provided with two through holes, and the axis of the through hole is perpendicular to the plane where the cover plate is located, and the edge is provided with fine thread, and the fine thread is screwed into the cavity and compresses the material in the cavity.

[0016] Compared with the prior art, the technical scheme of the utility model has the advantages that:

[0017] (1) The iron sheet is placed on the ferrite to magnetically guide the product;

[0018] (2) The samarium-cobalt permanent magnet is adopted, the magnetic stability is long-lasting, the magnetic field strength is not easy to decay, and the nickel sheet is placed on the samarium-cobalt permanent magnet to improve and compensate the working temperature of the product;

[0019] (3) The radio frequency resistance is 20W, small in volume, high in energy efficiency, the surface of the inner conductor is plated with silver, and the single surface of the spin magnetic ferrite is silver baked, so as to enhance the conductivity and reduce the loss;

[0020] (4) The surface-mounted isolator is small in volume, simple in structure, convenient to install, good in working stability at extreme temperature, small in loss, strong in magnetic resistance, and high in isolation degree. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model discloses an ultra-miniaturized high-efficiency surface-mounted isolator structure explosion map.

[0022] Figure 2 The utility model discloses an ultra-miniaturized high-efficiency surface-mounted isolator assembly drawing. DETAILED DESCRIPTION

[0023] EMBODIMENT

[0024] In order to make the utility model more clearly, the utility model is further explained below in conjunction with the drawings, and the specific embodiment described here is only used to explain the utility model and does not limit the utility model.

[0025] Referring to Figure 1 An ultra-miniaturized high-efficiency surface-mounted isolator is characterized in that:

[0026] The cavity 1 is processed by using easy-to-cut steel material, and the surface is silver-plated to enhance the conductivity; the lower rotating magnet ferrite 2, the lower dielectric ring 3, the inner conductor 6, the upper dielectric ring 4, the upper rotating magnet ferrite 5, the iron sheet 7, the samarium-cobalt permanent magnet 8 and the nickel sheet 9 are sequentially placed inside the cavity 1, the cover plate 10 is processed with a stainless steel edge to form fine teeth threads, is screwed into the cavity 1 and compresses other materials in the cavity;

[0027] The upper and lower dielectric rings are respectively sleeved into the corresponding upper and lower rotating magnet ferrites, and the inner conductor 6 is clamped between the upper and lower groups of dielectric rings and rotating magnet ferrites.

[0028] Referring to Figure 1 The main body of the inner conductor 6 is a trifurcated structure, branch lines 61 and a center lead 62 are respectively arranged between adjacent two branches, the branch lines 61 are two and are symmetrically distributed around the axis of the center lead 62 as a middle line, and the end portion of the branch line 61 is provided with a protruding rectangular structure 61a;

[0029] Referring to Figure 1 and Figure 2 The cavity 1 is a cylindrical barrel structure, the lower end is sealed, the upper end is open, and three ports corresponding to the lead lines are arranged on the side wall, including two symmetrical vertical openings 1b and a circular hole 1a, the bottom of the vertical opening 1b is provided with a horizontal boss 1c, the boss 1c is provided with a port clamping groove 1d, and each welding needle 11 is clamped into the port clamping groove 1d.

[0030] The rectangular structure 61a is clamped into the vertical opening 1b of the cavity 1, and a fixing hole is arranged in the center of the rectangular structure 61a, and the welding needle 11 is connected with the corresponding lead 61 through the fixing hole;

[0031] The center lead 62 is led out from the circular hole 1a of the cavity 1, and the load step 1e is arranged above the circular hole 1a, and the radio frequency resistor 12 is vertically welded on the load step 1e, so as to be connected with the lead of the inner conductor through welding.

[0032] The main technical indexes of the surface-mounted isolator of the embodiment are shown in the following table:

[0033]

[0034] In the embodiment, the spin magnetic ferrite is single-surface silver baked, the silver baked surface of the lower spin magnetic ferrite 3 is downward and contacts with the bottom of the inner cavity of the cavity 1, and the silver baked surface of the upper spin magnetic ferrite 5 is upward and contacts with the iron sheet 7 above.

[0035] In the embodiment, the outer edge of the nickel sheet 9 is provided with a pair of protruding arc-shaped clamping ears 9a, the arc-shaped clamping ears 9a are arranged opposite to the vertical opening 1b and extend out of the corresponding vertical opening 1b, so as to serve as a card and have a dual-purpose function.

[0036] The surface-mounted isolator of the embodiment has the advantages of small size, simple structure, convenient installation, good working stability at the limit temperature, small loss, strong magnetic resistance, high isolation degree and the like.

[0037] In addition to the above-mentioned embodiments, the utility model can also have other implementation manners. Any technical scheme formed by equivalent replacement or equivalent transformation falls within the protection scope required by the utility model.

Claims

1. A super miniaturized high-efficiency surface-mounted isolator comprising a cavity (1), characterized in that: the bottom of the cavity (1) is provided with a lower dielectric ring (2) and a lower spin magnet ferrite (3) nested with each other, and an upper dielectric ring (4) and an upper spin magnet ferrite (5) nested with each other, the upper and lower dielectric rings are respectively sleeved into the corresponding upper and lower spin magnet ferrites, and the inner conductor (6) is clamped between the two groups of dielectric rings and spin magnet ferrites; the upper spin magnet ferrite (5) is sequentially provided with an iron sheet (7), a samarium-cobalt permanent magnet (8), a nickel sheet (9) and a cover plate (10), the cover plate (10) is fixed in the cavity (1) by rotation; the main body of the inner conductor (6) is a trifurcated structure, branch leads (61) and a center lead (62) are respectively arranged between adjacent two branches, the branch leads (61) are symmetrically distributed around the axis of the center lead (62) as a middle line and are provided in two, the end of the branch lead (61) is provided with a protruding rectangular structure (61a), three ports corresponding to the leads are provided on the cavity (1), the rectangular structure (61a) is clamped into the ports on both sides of the cavity (1) and is fixed by a welding pin (11), and the center lead (62) is led out of the round hole (1a) of the cavity (1) and connected with a radio frequency resistor (12).

2. The super miniaturized high-efficiency surface-mounted isolator according to claim 1, characterized in that: the cavity (1) is a cylindrical tubular structure, the lower end of the cavity (1) is sealed, and the upper end is open, two symmetrical vertical openings (1b) are provided on the side wall of the cavity (1), the bottom of the vertical opening (1b) is provided with a horizontal boss (1c), the boss (1c) is provided with a port clamping groove (1d), and each welding pin (11) is clamped into the port clamping groove (1d).

3. The super miniaturized high-efficiency surface-mounted isolator according to claim 1 or 2, characterized in that: the cavity (1) is made of easily cut steel material, and the surface of the cavity (1) is silver plated, a load step (1e) is further provided above the round hole (1a) of the side wall of the cavity (1), and the radio frequency resistor (12) is vertically welded on the load step (1e).

4. The super miniaturized high-efficiency surface-mounted isolator according to claim 1 or 2, characterized in that: the radio frequency resistor (12) is a 20W load.

5. The super miniaturized high-efficiency surface-mounted isolator according to claim 1 or 2, characterized in that: the inner conductor (6) is made of 0.1mm thick copper foil, and the surface of the inner conductor (6) is silver plated, the rectangular structure (61a) of the two branch leads (61) is provided with a fixing hole at the center, the welding pin (11) is connected with the branch lead (61) by penetrating through the fixing hole, and the center lead (62) is led out and welded with the radio frequency resistor (12).

6. The super miniaturized high-efficiency surface-mounted isolator according to claim 1 or 2, characterized in that: the upper spin magnet ferrite (3) and the lower spin magnet ferrite (5) are both made of 0.55mm thick power-resistant material, and the single surface of the upper spin magnet ferrite (3) and the lower spin magnet ferrite (5) is silver baked, the silver baked surface of the lower spin magnet ferrite (3) faces downward and contacts the bottom of the inner cavity of the cavity (1), and the silver baked surface of the upper spin magnet ferrite (5) faces upward and contacts the iron sheet (7) thereon.

7. The super miniaturized high-efficiency surface-mounted isolator according to claim 1 or 2, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ The upper medium ring (2) and the lower medium ring (4) are made of polytetrafluoroethylene material.

8. The ultra-small high-efficiency surface-mounted isolator according to claim 1 or 2, characterized in that: The nickel sheet (9) is made of nickel alloy material, and a pair of protruding arc-shaped lugs (9a) are arranged at the outer edge of the nickel sheet (9), the arc-shaped lugs (9a) are arranged opposite to the vertical openings (1b) and protrude out of the corresponding vertical openings (1b).

9. The ultra-small high-efficiency surface-mounted isolator according to claim 1 or 2, characterized in that: The cover plate (10) is provided with two through holes (10a), the axis of the through holes (10a) is perpendicular to the plane where the cover plate (10) is located, the edge of the cover plate (10) is provided with fine thread, and the cover plate (10) is screwed into the cavity (1) to compress the material in the cavity.

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