Circulator cavity cover combination with temperature compensation characteristic

Abstract

The invention relates to the field of microwave ferrite devices, in particular to a circulator cavity cover combination with a temperature compensation characteristic, which comprises a circulator main body formed by sequentially stacking a lower magnet, a silver-plated iron sheet, a PTFE (Polytetrafluoroethylene) fixing ring, a gyromagnet, an inner conductor, a PTFE fixing ring, a gyromagnet, an anti-rotation sheet and an upper magnet, and further comprises a cavity and a cavity cover, the cavity and the cavity cover are made of chromium-nickel-iron alloy, and the circulator main body is arranged between the cavity and the cavity cover and is fixed through matching of the cavity and the cavity cover. And due to the chromium-nickel-iron alloy material, the product does not need to be additionally provided with a nickel-iron alloy sheet, and meanwhile, the wide-temperature working stability and reliability of the product can be ensured.

Description

Technical Field

[0001] The invention relates to the field of microwave ferrite devices, and in particular to a circulator cavity cover combination with temperature compensation characteristics. Background Art

[0002] A circulator is a passive device used in microwave communication systems that can control the unidirectional transmission of signals in a specific direction. In microwave ferrite devices, the working principle of the circulator is based on the unique properties of ferrite gyromagnetic materials. When a high-frequency wave field and a constant DC magnetic field act on this material at the same time, it exhibits gyromagnetic properties, namely the so-called tensor permeability properties. This property induces an electromagnetic effect in ferrite: the polarization of the electromagnetic wave rotates during propagation.

[0003] A circulator usually consists of the following parts:

[0004] Ferrite core: This is the core component of the circulator, usually made of ferrite with high magnetic permeability. The ferrite core is placed in an external magnetic field to produce the required magnetization intensity.

[0005] Waveguide or coaxial connector: An interface used to connect microwave signal input and output.

[0006] Phase delay elements: These elements are used to ensure that the signal reaches the next port at the correct time, thus achieving unidirectional transmission.

[0007] Magnet: Provides a constant external magnetic field to align the electron spins in the ferrite, thereby producing the Faraday rotation effect.

[0008] The existing circulator is composed of a lower iron-nickel alloy sheet, a lower magnet, a silver-plated iron sheet, a PTFE fixing ring, a rotating magnet, an inner conductor, a PTFE fixing ring, a rotating magnet, an anti-rotation sheet, an upper magnet, and an upper iron-nickel alloy sheet, which are stacked in sequence in the cavity, and finally the cover is screwed into the cavity and tightened. The cavity material is Y15 machinable steel and the cover is SUS416 stainless steel, which is of no help in adjusting the consistency of the temperature coefficient of the magnet and the temperature coefficient of the microwave ferrite, making it difficult for the circulator to maintain good working performance in a wider temperature range. Summary of the invention

[0009] The object of the present invention is to provide a circulator cavity cover assembly with temperature compensation characteristics, so as to ensure the reliability and stability of the circulator within the entire operating temperature range.

[0010] To achieve the above-mentioned purpose, the present invention provides a circulator cavity cover combination with temperature compensation characteristics, including a circulator body formed by stacking a lower magnet, a silver-plated iron sheet, a PTFE fixing ring, a rotating magnet, an inner conductor, a PTFE fixing ring, a rotating magnet, an anti-rotation sheet and an upper magnet in sequence, and also including a cavity and a cavity cover, wherein the cavity and the cavity cover are made of chromium-nickel-iron alloy, and the circulator body is arranged between the cavity and the cavity cover, and is fixed by the cavity and the cavity cover.

[0011] Wherein, the cavity body and the cavity cover are assembled by matching internal and external threads.

[0012] The chemical elements contained in the chromium-nickel-iron alloy include Fe, Cr, Ni, C, S, P, Mn and Si.

[0013] The chemical elements contained in the chromium-nickel-iron alloy include, by weight percentage:

[0014] 42-52% Fe, 12-14% Cr, 37%-39% Ni, 0.04-0.07% C, 0.01-0.04% S, 0.01-0.04% P, 0.40-0.60% Mn, 0.3-0.31% Si.

[0015] The chemical elements contained in the chromium-nickel-iron alloy include, by weight percentage:

[0016] 47% Fe, 13% Cr, 38% Ni, 0.05% C, 0.02% S, 0.02% P, 0.50% Mn, 0.302% Si.

[0017] Wherein, the cavity has a first fitting portion, and the first fitting portion is in contact with the side surfaces of the lower magnet and the upper magnet.

[0018] Wherein, the cavity cover has a second fitting portion, and the second fitting portion is in contact with the side surfaces of the lower magnet and the upper magnet.

[0019] The present invention discloses a circulator cavity cover assembly with temperature compensation characteristics. The circulator body is composed of a series of carefully designed components. First, there is a lower magnet, which is used to provide a constant magnetic field environment; next is a silver-plated iron sheet, which is used to shield electromagnetic interference and enhance the stability of the overall structure; then there is a first PTFE (polytetrafluoroethylene) fixing ring, which is used to fix each component and provide electrical insulation; then there is the first layer of gyromagnets, which is one of the key components of the circulator and is responsible for realizing the Faraday rotation effect; followed by an inner conductor, which is used to guide microwave signals; then there is a second PTFE fixing ring, which plays a role of fixing and insulation again; then there is a second layer of gyromagnets, which further strengthens the magnetic control effect; the anti-rotation sheet is used to prevent the device from rotating unnecessarily during operation; the top is the upper magnet, which forms the required magnetic field environment together with the lower magnet. The cavity and cavity cover are made of chromium-nickel-iron alloy (Invar alloy), which is known for its excellent thermal stability and can maintain dimensional stability over a wide temperature range. More importantly, the alloy has a high saturation magnetization and low coercive force, ensuring that the effective magnetic permeability of the product remains almost unchanged under different temperature conditions, thereby ensuring the working stability of the circulator. The circulator body is placed between the cavity and the cavity cover, and is fixed by a precisely designed matching structure to ensure that the overall structure is both compact and sealed, minimizing the impact of the external environment on the performance of the circulator. Therefore, the circulator not only performs well under extreme temperature conditions (from -55°C to +125°C), but also has excellent magnetic response performance, ensuring its reliability and stability over the entire operating temperature range. This design is particularly important for microwave communication systems that need to work continuously in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 work.

[0021] Figure 1 It is a structural diagram of an existing circulator cavity cover assembly.

[0022] Figure 2 It is an exploded view of a circulator cavity cover assembly with temperature compensation characteristics of the present invention.

[0023] Figure 3 The figure is a comparison chart of the working performance indicators (standing wave) of the circulator assembled using the present cavity and the circulator assembled using the existing cavity at various temperatures.

[0024] Figure 4This is a diagram of the electrical performance of a circulator using the cavity cover assembly of the present invention at room temperature 25°C.

[0025] Figure 5 This is a diagram of the electrical performance of a circulator using the cavity cover assembly of the present invention at room temperature of -55°C.

[0026] Figure 6 This is a diagram of the electrical performance of a circulator using the cavity cover assembly of the present invention at room temperature of 125°C.

[0027] Figure 7 This is the electrical performance diagram of the circulator using a Y15 cavity and a SUS416 cover at room temperature 25°C.

[0028] Figure 8 This is the electrical performance diagram of the circulator using a Y15 cavity and a SUS416 cover at room temperature -55℃.

[0029] Fig. 9 This is the electrical performance diagram of the circulator using a Y15 cavity and a SUS416 cover at room temperature -55℃.

[0030] The lower magnet 101 , the silver-plated iron sheet 102 , the PTFE fixing ring 103 , the rotating magnet 104 , the inner conductor 105 , the PTFE fixing ring 106 , the rotating magnet 1007 , the anti-rotation sheet 108 , the upper magnet 109 , the cavity 110 , the cavity cover 111 , and the first fitting portion 112 . DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0033] First embodiment

[0034] See also Figure 1-2The present invention provides a circulator cavity cover 111 combination with temperature compensation characteristics, including a circulator body formed by stacking a lower magnet 101, a silver-plated iron sheet 102, a PTFE fixing ring 103, a gyromagnet 104, an inner conductor 105, a PTFE fixing ring 103, a gyromagnet 104, an anti-rotation sheet 108 and an upper magnet 109 in sequence, and also includes a cavity 110 and a cavity cover 111, the cavity 110 and the cavity cover 111 are made of chromium-nickel-iron alloy, the circulator body is arranged between the cavity 110 and the cavity cover 111, and is fixed by the cavity 110 and the cavity cover 111.

[0035] In this embodiment, the circulator body is composed of multiple components, first of all, the lower magnet 101 is used to provide a constant magnetic field; followed by the silver-plated iron sheet 102, which plays a role in shielding and reinforcing the structure; followed by the first PTFE (polytetrafluoroethylene) PTFE fixing ring 103, which is used for fixing and insulation; then the first layer of gyromagnets 104, which is one of the key components of the circulator and is responsible for realizing the Faraday rotation effect; followed by the inner conductor 105, which is used to guide microwave signals; then the second PTFE fixing ring 103, which is also used for fixing and insulation; followed by the second layer of gyromagnets 104, which further enhances the magnetic control effect; finally, the anti-rotation sheet 108, which is used to prevent the entire device from rotating unnecessary during operation; the top is the upper magnet 109, which forms the required magnetic field environment together with the lower magnet 101.

[0036] The cavity 110 and the cavity cover 111 are made of chromium-nickel-iron alloy (Invar alloy). This material has excellent magnetic response performance, which ensures that the effective magnetic permeability of the product remains almost unchanged at different temperatures in a wide temperature range, thereby ensuring the working stability of the circulator. The circulator body is arranged between the cavity 110 and the cavity cover 111, and the two are fixed together through a matching structure to ensure the compactness and sealing of the overall structure and avoid the influence of external interference on the performance of the circulator.

[0037] It has higher saturation magnetization intensity and lower coercive force, and has good magnetic response performance, which ensures that the circulator has good working performance in a wide temperature range of -55℃ to +125℃.

[0038] Because the cavity cover 111 of the circulator is made of chromium-nickel-iron alloy, the product does not need to add additional nickel-iron alloy sheets while ensuring that the product has wider temperature working characteristics. At the same time, the height of the product can be further reduced by about 3mm, reducing the product weight, which meets the low thickness and light weight design.

[0039] The cavity body 110 and the cavity cover 111 are assembled by matching internal and external threads.

[0040] The cavity 110 and the cavity cover 111 are assembled by adopting an internal and external thread design, which is not only convenient for disassembly and maintenance, but also can ensure a tight connection between the cavity 110 and the cavity cover 111, improve the stability and sealing of the overall structure, and thus protect the internal components from the influence of external environmental factors.

[0041] The chemical elements contained in the chromium-nickel-inconel alloy include Fe, Cr, Ni, C, S, P, Mn and Si.

[0042] The chemical elements contained in the chromium-nickel-iron alloy include, by weight percentage:

[0043] 42-52% Fe, 12-14% Cr, 37%-39% Ni, 0.04-0.07% C, 0.01-0.04% S, 0.01-0.04% P, 0.40-0.60% Mn, 0.3-0.31% Si.

[0044] Fe (Iron): With a content of 42% to 52%, iron is the basic component of the alloy and provides the basic physical properties of the alloy.

[0045] Cr (Chromium): With a content of 12% to 14%, chromium improves the corrosion resistance and hardness of the alloy.

[0046] Ni (nickel): The content is 37% to 39%. Nickel is one of the most important components in the alloy, giving the alloy excellent thermal stability and a low thermal expansion coefficient.

[0047] C (Carbon): The content is 0.04% to 0.07%. A small amount of carbon enhances the hardness and strength of the alloy.

[0048] S (sulfur): The content is 0.01% to 0.04%. The presence of sulfur is to improve the cutting performance of the alloy.

[0049] P (Phosphorus): The content is 0.01% to 0.04%. Phosphorus also helps to improve the mechanical processing properties of the alloy.

[0050] Mn (Manganese): With a content of 0.40% to 0.60%, manganese helps to increase the toughness of the alloy.

[0051] Si (Silicon): With a content of 0.3% to 0.31%, silicon can increase the strength of the alloy and improve its casting properties.

[0052] The cavity of the present invention contains about 38% Ni, and does not need to be subjected to special treatment such as electroplating on its surface. It can also have the functions of anti-oxidation and anti-salt spray, and the product cost is further reduced.

[0053] The cavity 110 has a first fitting portion 112 , and the first fitting portion 112 contacts the side surfaces of the lower magnet 101 and the upper magnet 109 .

[0054] Usually, due to the limitation of product height, a single nickel-iron alloy sheet can only act on the upper magnet 109 of the product, while the lower magnet 101 does not get temperature compensation, making it difficult for the product to meet the wide temperature working characteristics (-55℃~+125℃). Even if the lower magnet 101 is also equipped with a nickel-iron alloy sheet, the product cannot meet the wider wide temperature working characteristics (-55℃~+125℃). The circulator cavity 110 of the present invention has a first bonding portion 112 so that the side of the permanent magnet is also bonded to increase the temperature compensation area, and the permanent magnet is better temperature compensated, effectively ensuring that the magnetic permeability remains unchanged at different temperatures and wider temperatures, and further using the product with a wider wide temperature working characteristic.

[0055] Second embodiment

[0056] The present invention provides a circulator cavity cover 111 combination with temperature compensation characteristics, including a circulator body formed by stacking a lower magnet 101, a silver-plated iron sheet 102, a PTFE fixing ring 103, a gyromagnet 104, an inner conductor 105, a PTFE fixing ring 103, a gyromagnet 104, an anti-rotation sheet 108 and an upper magnet 109 in sequence, and also including a cavity 110 and a cavity cover 111, wherein the cavity 110 and the cavity cover 111 are made of chromium-nickel-iron alloy, and the circulator body is arranged between the cavity 110 and the cavity cover 111, and is fixed by the cavity 110 and the cavity cover 111.

[0057] The cavity body 110 and the cavity cover 111 are assembled by matching internal and external threads.

[0058] The chemical elements contained in the chromium-nickel-inconel alloy include Fe, Cr, Ni, C, S, P, Mn and Si.

[0059] The chemical elements contained in the chromium-nickel-iron alloy include, by weight percentage:

[0060] 47% Fe, 13% Cr, 38% Ni, 0.05% C, 0.02% S, 0.02% P, 0.50% Mn, 0.302% Si.

[0061] The cavity cover 111 has a second fitting portion, which is in contact with the side surfaces of the lower magnet 101 and the upper magnet 109 .

[0062] In this embodiment, the material ratios of the chromium-nickel-inconel alloy are preferably selected to obtain better working performance, and the fitting portion is integrated into the cavity cover 111 instead of the cavity body 110 to achieve the corresponding function.

[0063] See also Figure 3 to Figure 9 , which is a performance diagram of the chromium-nickel-inconel alloy used in the present invention and the cavity material used in the prior art using Y15 machinable steel and the cover using SUS416. It can be found from the accompanying drawings that the present invention has good working performance in the entire working temperature range.

[0064] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A circulator cavity cover assembly with temperature compensation characteristics, comprising a circulator body formed by stacking a lower magnet, a silver-plated iron sheet, a PTFE fixing ring, a gyromagnet, an inner conductor, a PTFE fixing ring, a gyromagnet, an anti-rotation sheet and an upper magnet in sequence, characterized in that: It also includes a cavity and a cavity cover, which are made of chromium-nickel-iron alloy. The circulator body is arranged between the cavity and the cavity cover and is fixed by the cavity and the cavity cover.

2. A circulator chamber cover assembly with temperature compensation characteristics as claimed in claim 1, characterized in that: The cavity body and the cavity cover are assembled by matching internal and external threads.

3. The circulator chamber cover assembly with temperature compensation characteristics as claimed in claim 1, characterized in that: The chemical elements contained in the chromium-nickel-inconel alloy include Fe, Cr, Ni, C, S, P, Mn and Si.

4. A circulator chamber cover assembly with temperature compensation characteristics as claimed in claim 3, characterized in that: The chemical elements contained in the chromium-nickel-iron alloy include, by weight percentage: 42-52% Fe, 12-14% Cr, 37%-39% Ni, 0.04-0.07% C, 0.01-0.04% S, 0.01-0.04% P, 0.40-0.60% Mn, 0.3-0.31% Si.

5. The circulator chamber cover assembly with temperature compensation characteristics as claimed in claim 3, characterized in that: The chemical elements contained in the chromium-nickel-iron alloy include, by weight percentage: 47% Fe, 13% Cr, 38% Ni, 0.05% C, 0.02% S, 0.02% P, 0.50% Mn, 0.302% Si.

6. The circulator chamber cover assembly with temperature compensation characteristics as claimed in claim 1, characterized in that: The cavity has a first fitting portion, which is in contact with the side surfaces of the lower magnet and the upper magnet.

7. The circulator chamber cover assembly with temperature compensation characteristics as claimed in claim 1, characterized in that: The cavity cover has a second fitting portion, and the second fitting portion is in contact with the side surfaces of the lower magnet and the upper magnet.

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