Miniaturized microstrip annular isolation assembly for T-R system

Abstract

The invention relates to a miniaturized micro-strip annular isolation assembly for a T-R system. The miniaturized micro-strip annular isolation assembly comprises a magnetic conductive sheet, a ferrite substrate, a circuit, two ceramic sheets, two permanent magnets and a resistor, the ferrite substrate is mounted on the magnetic conductive sheet, the circuit is etched on the ferrite substrate through a thin film process, the two ceramic sheets are mounted on the circuit, and the two permanent magnets are correspondingly mounted on the two ceramic sheets respectively; the two permanent magnets are made of samarium cobalt permanent magnet materials and are used for activating the ferrite gyromagnet through the circuit. According to the invention, electrical performance indexes can be achieved and miniaturization can be realized at the same time.

Description

Technical Field

[0001] The invention relates to the field of TR system design, and in particular to a miniaturized microstrip loop isolation component for a TR system. Background Art

[0002] Microstrip ring isolation components are electronic devices that work at microwave frequencies. They achieve signal isolation and transmission by utilizing the gyromagnetic effect of ferrite materials under the combined action of DC magnetic fields and microwave fields. These components play a vital role in many key fields, such as information communication, electronic countermeasures, and aerospace, especially in scenarios where inter-stage isolation and antenna sharing are required.

[0003] In the TR system of active phased array radar, microstrip circulator isolation components can realize the same frequency duplex function, that is, the signal is transmitted and received at the same frequency at the same time. The design of these components pursues miniaturization, planarization and thin filmization to reduce the size and weight of the device. The performance needs to meet the requirements of wide bandwidth, low insertion loss, high isolation and certain power capacity. In addition, it is also required to have high phase and amplitude consistency, as well as good magnetic shielding performance to ensure the stability and safety of signal transmission. In order to meet industrial needs, these components should also have low cost and high mass production capabilities. In microwave circuits, circulators and isolators have multiple functions, including intermediate coupling, inter-electrode coupling, protecting the transmitting source from interference, reducing frequency pulling, eliminating interference, separating the transmitting and receiving signals, and removing unnecessary radiation. Microstrip circulators and isolator components have been widely used in phased array radar systems due to their small size, planar integration, wide operating frequency band and light weight. They can effectively isolate the transmitting and receiving signals, thereby improving the overall performance of the circuit.

[0004] The circuit of the microstrip structure product is directly made on a monolithic ferrite gyromagnetic substrate through a thin film sputtering process, omitting the structural cavity and magnetic shielding cover, thereby simplifying the structural design and reducing the weight. However, since the thickness of the circuit for transmitting signals is only about 8 microns, the cross-sectional resistance increases, and the transmission loss also increases accordingly. If the size of the microstrip structure is further reduced, the loss may increase and the signal transmission efficiency may be reduced. Therefore, it is very necessary to study a microstrip ring isolation component that can ensure signal transmission efficiency and is light, small and reliable. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention proposes a miniaturized microstrip loop isolation component suitable for the TR system, which can achieve miniaturization while isolating the signal transmission and reception, and is achieved through the following technical solutions: A miniaturized microstrip ring isolation component for a TR system, comprising: Magnetic conductive sheet, ferrite substrate, circuit, two ceramic sheets, two permanent magnets, and a resistor; The ferrite substrate is mounted on the magnetic conductive sheet, the circuit is etched on the ferrite substrate by a thin film process, the two ceramic sheets are mounted on the circuit, and the two permanent magnets are mounted on the two ceramic sheets respectively; The two permanent magnets are cylindrical samarium cobalt permanent magnet materials with a diameter of 2 mm and a height of 1 mm, and are used to excite the ferrite gyromagnetism through the circuit.

[0006] Furthermore, the ferrite substrate is made of ferrite gyromagnetic material of 6 mm×7 mm×0.4 mm.

[0007] Furthermore, the microstrip loop isolation component is provided with a central resonant circuit, and the central resonant junction circuit adopts a double Y multi-resonant mode, which can realize two different resonant modes to meet the bandwidth requirements of its working passband. The split end adopts a resonant circuit in an impedance transformation mode to transition to each port. The two circuits each have a port for mutual connection, so that the product has both loop function and isolation function.

[0008] Furthermore, the distance between the two permanent magnets is greater than 1.5 mm, which is used to provide a bias magnetic field for magnetization of the ferrite substrate.

[0009] Furthermore, the bottom of the resistor is fixed to the magnetic conductive sheet by welding, and the leads of the resistor are connected to the circuit.

[0010] Furthermore, DT4 industrial pure iron is used as the bottom magnetic conductive material.

[0011] Furthermore, the ferrite gyromagnetic material of the ferrite substrate adopts a ferrite gyromagnetic material with high magnetic saturation of 2600Gs and wide line width.

[0012] Furthermore, the permanent magnet is made of XY-33 high-grade samarium cobalt permanent magnet material.

[0013] Furthermore, the width of the magnetic conductive sheet and the ferrite substrate in the miniaturized microstrip loop isolation component are both 7 mm and the length are both 6 mm; the resistor is placed on the magnetic conductive sheet and connected to the circuit, so that the upper length of the entire component is 9.3 mm.

[0014] Furthermore, the total height of the miniaturized microstrip ring isolation component is less than 2.2 mm.

[0015] The beneficial effect of the present invention is that the microstrip ring isolation component involved in the technical solution has the characteristics of small size, light weight and high reliability, is suitable for TR systems, and can significantly reduce the overall volume and weight of the system. The microstrip ring isolation component combines small size, lightweight design and excellent reliability, ensuring stable operation and information security in complex electromagnetic environments. Moreover, the microstrip ring isolation component is applicable to a wide operating frequency range, is not easily detected by the enemy through different transformations, has high confidentiality and strong anti-interference ability. In addition, the present invention also carries out circuit design and optimizes the magnetization performance, ensuring that the component is miniaturized while improving the integration and performance of the component, and can also achieve excellent electrical performance to meet the magnetization requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a miniaturized microstrip loop isolation component for a TR system of the present invention; Figure 2 This is a front view of a miniaturized microstrip loop isolation component for a TR system of the present invention; Figure 3 A side view of a miniaturized microstrip loop isolation component for a TR system of the present invention; Figure 4 A circuit diagram of a central resonant junction used in a miniaturized microstrip ring isolation component for a TR system of the present invention; Figure 5 A schematic diagram of a positive Y in a central resonant junction circuit used in a miniaturized microstrip ring isolation component for a TR system of the present invention; Figure 6 The diagram is a reverse Y diagram of a central resonant junction circuit used in a miniaturized microstrip ring isolation component for a TR system of the present invention.

[0017] Description of the accompanying drawings: 1 is a magnetic conductive sheet; 2 is a ferrite substrate; 3 is a circuit; 4 is a ceramic sheet; 5 is a permanent magnet; 6 is a resistor; 11, 22, 31, 32, 33, 34 are branch terminals of the circuit. DETAILED DESCRIPTION

[0018] Hereinafter, the terms "include" or "may include" used in various embodiments of the present invention indicate the presence of the invented function, operation or element, and do not limit the addition of one or more functions, operations or elements. In addition, as used in various embodiments of the present invention, the terms "include", "have" and their cognates are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the foregoing, and should not be understood as first excluding the presence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing or the possibility of adding one or more features, numbers, steps, operations, elements, components or combinations of the foregoing.

[0019] In order to make the purpose, technical scheme and advantages of the present invention more clear, the present invention is further described in detail below in combination with the embodiments and drawings. It should be understood that the specific embodiments described here are only used to explain this community and are not used to limit this application. Based on the embodiments in this application, other embodiments obtained by ordinary technicians in this field without making creative work are all within the scope of protection of this application.

[0020] Example 1 like Figure 1 As shown, an embodiment of the present invention provides a miniaturized microstrip ring isolation component for a TR system, including: a magnetic conductive sheet 1, a ferrite substrate 2, a circuit 3, two ceramic sheets 4, two permanent magnets 5, and a resistor 6; the ferrite substrate 2 is mounted on the magnetic conductive sheet 1, the circuit 3 is etched on the ferrite substrate 2 by a thin film process, the two ceramic sheets 4 are mounted on the circuit 3, and the two permanent magnets 5 are respectively mounted on the two ceramic sheets 4, and the two permanent magnets 5 use cylindrical samarium cobalt permanent magnet materials with a diameter of 2 mm and a height of 1 mm, which are used to excite the ferrite gyromagnetism. The weight of the aforementioned miniaturized microstrip ring isolation component is less than 4 grams.

[0021] In the technical solution, there are two circuit center junctions in the circuit 3, and the center resonant junction circuit of the microstrip ring isolation component adopts a double Y multi-resonance mode to meet the bandwidth requirements of its working passband. The double Y multi-resonance mode involves two or more resonant circuits of Y-type structures, which are coupled together to form a complex resonant system. Each Y-type structure can be regarded as an independent resonator with certain resonant frequencies and characteristics. When these resonators are coupled, the interaction between them can generate multiple resonant frequencies, thereby forming a double Y multi-resonance mode.

[0022] In the double-Y multi-resonance mode, each resonant frequency corresponds to a specific electromagnetic oscillation mode in the circuit. These oscillation modes can overlap and interfere with each other, generating various current and voltage waveforms, allowing multiple resonant frequencies to exist simultaneously, which provides multiple possibilities for realizing signal processing, filtering and communication functions.

[0023] like Figure 4 As shown, the sub-ends 31, 32, 33, and 34 are transitioned to each port by a resonant circuit in an impedance transformation manner. Each of the two circuits has a port for interconnection, so that the product has both a circulation function and an isolation function. This is to enlarge the center node of the circuit through circuit design without increasing the volume, and achieve better electrical performance through simulation and optimization. It is worth noting that the distance between the two permanent magnets is greater than 1.5 mm, which ensures that the requirements of the magnetic flux are met while making the distance between the two permanent magnets as far as possible, thereby reducing mutual interference.

[0024] Furthermore, the ferrite substrate is made of ferrite gyromagnetic material of 6 mm×7 mm×0.4 mm, which reduces the volume and weight of the aforementioned microstrip ring isolation component.

[0025] In this embodiment, DT4 industrial pure iron with a high iron content is used as the bottom magnetic conductive material in the design of the component. The iron content of DT4 industrial pure iron is as high as 99.5% or more, ensuring the high purity and excellent performance of the material. The characteristics of DT4 industrial pure iron are: low coercive force, high magnetic permeability, high saturation magnetic induction, stable magnetism and no magnetic aging. In addition, DT4 industrial pure iron also has good mechanical properties. Its tensile strength and yield strength reach high levels respectively, with excellent elongation, moderate hardness, easy cold and hot processing, and excellent welding and electroplating properties. These characteristics make DT4 industrial pure iron perform well in the processing and forming process, and can meet the requirements of various complex shapes and precision.

[0026] In this scheme, while meeting the 14-20GHz full frequency bandwidth, according to the spin wave characteristics of the ferrite gyromagnetic material, the ferrite gyromagnetic material of the ferrite substrate adopts a ferrite gyromagnetic material with a high magnetic saturation of 2600Gs and a wide line width, which effectively avoids performance deficiencies, reduces potential errors, and further enhances the stability and reliability of the material. Preferably, the samarium cobalt permanent magnet material is a XY-33 high-grade samarium cobalt permanent magnet material with a diameter of 2 mm. Ferrite gyromagnetic materials have strong magnetic properties, high magnetic permeability, and low magnetic loss. This feature makes ferrite gyromagnetic materials play an irreplaceable role in microwave devices, communication equipment, and radar systems, and can effectively improve the performance and stability of the equipment. Ferrite gyromagnetic materials also have good physical and chemical stability, can maintain the stability of their magnetic properties in harsh environments, have broad application prospects, and can meet the needs of complex and changing working environments. Ferrite gyromagnetic materials also have a high cost-effectiveness, their preparation process is relatively mature, and their production cost is low, which gives them a clear advantage in market competition. At the same time, ferrite gyromagnetic materials also have good processing performance and plasticity, which can meet the requirements of material shape and size in different fields.

[0027] In the present invention, by simulating and optimizing the microstrip circuit, better electrical performance is achieved while meeting the requirements of the operating frequency, and the volume is greatly reduced.

[0028] Example 2 On the basis of Example 1, Figure 2 As shown, the width of the magnetic conductive sheet and the ferrite substrate in the miniaturized microstrip ring isolation assembly for the TR system are both 7 mm and the length is 6 mm. In addition, the bottom of the resistor is fixed to the magnetic conductive sheet by welding, the lead of the resistor is connected to the circuit, and the branch end 34 of the circuit is connected to the resistor, so that the upper length of the overall assembly is 9.3 mm.

[0029] Example 3 On the basis of Example 2, Figure 3 As shown in the side view of the miniaturized microstrip ring isolation component for the TR system, the total height of the component is less than 2.2 mm, which controls the overall volume of the microstrip ring isolation component.

[0030] The present invention proposes a miniaturized microstrip ring isolation component, and uses it in a TR system, which effectively improves the practicability of the system with its small size and high performance.

[0031] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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.

[0032] Example 4 On the basis of Example 3, Figure 5 As shown, Figure 5 The diagram of the positive Y in the center resonant junction circuit used in a miniaturized microstrip ring isolation component for a TR system of the present invention. In the double-Y multi-resonance mode, the positive Y structure is a key component, which includes branch terminals 33, 44, 11, and 22. Branch terminals 33 and 44 are located on both sides of the positive Y structure to form two main signal transmission paths. Branch terminals 11 and 22 are located at the top and bottom of the positive Y structure to play the role of auxiliary resonance and signal adjustment.

[0033] Specifically, the design of the split ends 33 and 44 is mainly to optimize the transmission efficiency and bandwidth of the signal. They ensure that the signal can maintain low loss and high isolation during transmission by adjusting the phase and amplitude of the signal. At the same time, the split ends 33 and 44 also play the role of matching circuits, so that the entire microstrip ring isolation component can better adapt to different microwave integrated circuit environments.

[0034] The branch terminals 11 and 22 are mainly used to adjust the resonant frequency and enhance the stability of the device. They introduce additional resonant paths so that the device can maintain a stable resonant state in a wider frequency range. This design not only improves the bandwidth and performance of the device, but also enhances its anti-interference ability.

[0035] In the field of digital signal processing, the dual-Y multi-resonance mode design of the microstrip ring isolation component is of great significance. It can effectively process high-speed digital signals and ensure the integrity and accuracy of the signals. At the same time, this design also improves the reliability and stability of the device, providing a strong guarantee for the normal operation of the digital communication system.

[0036] The central resonant junction circuit of the microstrip ring isolation component adopts a double-Y multi-resonant mode design, and achieves high-performance microwave signal transmission and isolation by optimizing the split-end layout and performance parameters of the positive Y structure. This design method can improve the bandwidth and performance of the microstrip ring isolation component of this embodiment.

[0037] Example 5 On the basis of Example 4, Figure 6 As shown, Figure 6 The figure is a schematic diagram of the reverse Y in the central resonant junction circuit used in a miniaturized microstrip circulator isolation component for a TR system of the present invention. In the process of microwave signal transmission, the traditional Y-shaped resonator may have problems such as low signal transmission efficiency, large insertion loss and insufficient reverse isolation due to structural limitations. These problems will not only affect the overall performance of the circulator, but may also have an adverse effect on the stability and reliability of the microwave communication system.

[0038] This embodiment effectively improves the traditional Y-shaped structure by introducing an inverted Y structure. The introduction of the inverted Y structure makes the resonator more symmetrical in structure, which is beneficial to the uniform transmission and reflection of microwave signals.

[0039] In the double-Y multi-resonance mode, multiple resonance points are formed inside the resonator, which can absorb and reflect microwave signals more effectively, thereby improving the signal transmission efficiency and reverse isolation. At the same time, due to the existence of the anti-Y structure, the overall size of the resonator is effectively controlled, which is conducive to the miniaturization and lightweight of the circulator.

[0040] In addition, the central resonant junction circuit of the double Y multi-resonance mode also has good temperature stability and frequency response characteristics. Under different temperature and frequency conditions, the resonator can maintain a relatively stable performance output, thereby ensuring the stable operation of the microwave communication system. The specific implementation methods described above further explain the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A miniaturized microstrip loop isolation component for a TR system, characterized in that: include: Magnetic conductive sheet, ferrite substrate, circuit, two ceramic sheets, two permanent magnets, and a resistor; The ferrite substrate is mounted on the magnetic conductive sheet, the circuit is etched on the ferrite substrate by a thin film process, the two ceramic sheets are mounted on the circuit, and the two permanent magnets are mounted on the two ceramic sheets respectively; The two permanent magnets are cylindrical samarium cobalt permanent magnet materials with a diameter of 2 mm and a height of 1 mm, and are used to excite the ferrite gyromagnetism through the circuit.

2. The miniaturized microstrip loop isolation component for TR system according to claim 1, characterized in that: The ferrite substrate is made of ferrite gyromagnetic material of 6 mm×7 mm×0.4 mm.

3. The miniaturized microstrip loop isolation component for TR system according to claim 1, characterized in that: In the circuit, the central resonant junction circuit of the circulator adopts a double-Y multi-resonant mode, and the branch end adopts a resonant circuit in an impedance transformation mode to transition to each port, and each of the two circuits has a port for mutual connection.

4. The miniaturized microstrip loop isolation component for TR system according to claim 1, characterized in that: The distance between the two permanent magnets is greater than 1.5 mm, and is used to provide a bias magnetic field for magnetization of the ferrite substrate.

5. The miniaturized microstrip loop isolation component for TR system according to claim 1, characterized in that: The bottom of the resistor is fixed on the magnetic conductive sheet by welding, and the lead wires of the resistor are connected to the circuit.

6. The miniaturized microstrip loop isolation component for TR system according to claim 1, characterized in that: DT4 industrial pure iron is used as the bottom magnetic conductive material.

7. The miniaturized microstrip loop isolation component for a TR system according to claim 1, characterized in that: The ferrite gyromagnetic material of the ferrite substrate adopts a ferrite gyromagnetic material with high magnetic saturation of 2600Gs and wide line width.

8. The miniaturized microstrip loop isolation component for a TR system according to claim 1, characterized in that: The permanent magnet is made of XY-33 high-grade samarium cobalt permanent magnet material.

9. The miniaturized microstrip loop isolation component for a TR system according to claim 1, characterized in that: The width of the magnetic conductive sheet and the ferrite substrate are both 7 mm, and the length is both 6 mm; the resistor is placed on the magnetic conductive sheet and connected to the circuit, so that the upper length of the entire assembly is 9.3 mm.

10. The miniaturized microstrip loop isolation component for a TR system according to claim 1, characterized in that: The total height of the miniaturized microstrip ring isolation assembly is less than 2.2 mm.

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