P-band broadband isolation filtering assembly

Abstract

The invention belongs to the field of communication, and relates to a P-band broadband isolation filtering assembly, which comprises a lower cover body, an inner conductor, a lower ferrite, an upper ferrite, a magnetic conductive sheet, a permanent magnet, a cover plate, an upper cover body, a resistor, an inductance coil, a connector, a circuit board and a capacitor, and is characterized in that the upper cover body and the lower cover body are movably connected together to form a closed cavity structure; the inner conductor, the lower ferrite, the upper ferrite, the magnetic conductive sheet, the permanent magnet and the cover plate are sequentially arranged on one side of the cavity structure, the circuit board is arranged on the other side of the cavity structure, the resistor is arranged on one side of the lower cover body, the inductance coil and the capacitor are arranged on the circuit board, and the magnetic conductive sheet is arranged on the other side of the cavity structure. The connectors are arranged on the two sides of the assembly. The filter is small in size, light in weight and high in reliability, has a high harmonic suppression function, enables a multi-frequency synthesis radar system not to interfere with other wave band signals, enables the whole system to work more stably, and can be universally applied to radar, communication and other systems.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and more specifically to a P-band broadband isolation filter component. Background Art

[0002] The P-band broadband isolation filter component is an electrical component that plays a key role in wireless communication systems. It is mainly used to filter and isolate signals in the P-band (e.g., the electromagnetic wave band with a passband operating frequency of 840-1400MHz). The component can effectively reduce or eliminate the impact of harmonics on other double frequency band radio frequency signals, while providing broadband performance to meet the needs of modern wireless communication systems for large capacity, high speed, small size and low power consumption.

[0003] However, in the prior art, there are some problems with P-band broadband isolation filter components. Although some filters such as LC, dielectric and SAW filters have been able to achieve miniaturization in the low-frequency band, it is extremely challenging to achieve miniaturization in the P-band while maintaining low loss and high power. Although microstrip or stripline filters can achieve broadband and high power, they have difficulties in miniaturization in the P-band, resulting in poor high-order harmonic suppression capabilities. In addition, although spiral cavity filters can achieve miniaturization and high power, it is also difficult to achieve broadband characteristics.

[0004] The design of filters often requires a trade-off between multiple performance parameters. For example, while meeting the passband bandwidth and insertion loss requirements, it may be necessary to compromise between high-order harmonic suppression and power handling. This increases the difficulty of design and manufacturing, and may result in performance that does not meet the requirements in some application scenarios. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a P-band broadband isolation filter component, comprising: A lower cover, an inner conductor, a lower ferrite, an upper ferrite, a magnetic conductive sheet, a permanent magnet, a cover plate, an upper cover, a resistor, an inductor, a connector, a circuit board, and a capacitor. The upper cover and the lower cover are movably connected together to form a closed cavity structure; the inner conductor, the lower ferrite, the upper ferrite, the magnetic conductive sheet, the permanent magnet and the cover plate are sequentially arranged on one side of the cavity structure, the circuit board is arranged on the other side of the cavity structure, the resistor is arranged on one side of the lower cover, the inductor and the capacitor are arranged on the circuit board, and the connector is arranged on both sides of the component.

[0006] Preferably, the inner conductor adopts a double Y-junction butterfly resonant structure.

[0007] Preferably, the upper ferrite is fixed in the cavity structure by bolts.

[0008] Preferably, the lower ferrite is fixed in the cavity structure by bolts.

[0009] Preferably, the connector is connected to the circuit board and the inner conductor by welding or threaded connection.

[0010] Preferably, the circuit board is connected to the cavity structure by bolts.

[0011] Preferably, a low-pass filter is provided on the rear side of the cavity structure.

[0012] Preferably, the lower cover body, the cover plate and the upper cover body are all made of polytetrafluoroethylene PTFE, polyethylene PE, ceramic material or composite material.

[0013] Preferably, the low-pass filter is a low-pass filter with an LC structure.

[0014] Preferably, the upper cover body and the lower cover body are movably connected together by means of a screw-cover structure.

[0015] The P-band broadband isolation filter assembly of the present invention has the following beneficial effects: First, the broadband isolation and filter are designed as an integrated whole. The isolator adopts a screw-cap structure. To meet the magnetic shielding requirements, the entire cavity is processed with easy-to-cut iron with high iron content. The filter is directly added to the output end of the isolator without a transition zone, which effectively reduces the overall size of the component. Secondly, the isolator adopts a broadband design with low magnetic saturation intensity. The inner conductor adopts double Y-junction butterfly resonance. By performing secondary impedance changes on the circuit port, the product can meet the working bandwidth requirements of one-fold frequency. Third, to meet the requirements of harmonic suppression, a low-pass filter is designed to be added behind the isolator. In order to obtain a steeper suppression curve and reduce the product size, an LC structure low-pass filter is used, which has stronger electrical performance.

[0016] Fourthly, this component is small in size, light in weight, highly reliable, and has high harmonic suppression function, so that the multi-frequency synthesis radar system will not interfere with other band signals, and the whole system will work more stably, which can be widely used in radar, communication and other electronic systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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 the structures shown in these drawings without paying creative work.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1 It is an exploded view of the P-band broadband isolation filter assembly of the present invention; Figure 2 It is an oblique view of the P-band broadband isolation filter assembly of the present invention; Figure 3 It is a side view of the P-band broadband isolation filter assembly of the present invention; Figure 4 is a top view of the P-band broadband isolation filter assembly of the present invention; Figure 5 It is a left view of the P-band broadband isolation filter assembly of the present invention; Figure 6 It is a schematic diagram of the application scenario of the P-band broadband isolation filter component of the present invention.

[0019] In the figure, 1-lower cover, 2-inner conductor, 3-lower ferrite, 4-upper ferrite, 5-magnetic conductive sheet, 6-permanent magnet, 7-cover plate, 8-upper cover, 9-resistance, 10-inductor, 11-connector, 12-circuit board, 13-capacitor. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their 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 at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] Figure 1 It is an exploded view of the P-band broadband isolation filter assembly of the present invention; Figure 2 It is an oblique view of the P-band broadband isolation filter assembly of the present invention; Figure 3 It is a side view of the P-band broadband isolation filter assembly of the present invention; Figure 4 is a top view of the P-band broadband isolation filter assembly of the present invention; Figure 5 This is a left view of the P-band broadband isolation filter assembly of the present invention. Figure 1-Figure 5 In the P-band broadband isolation filter component provided in the first embodiment of the present invention, it at least includes a lower cover body 1, an inner conductor 2, a lower ferrite 3, an upper ferrite 4, a magnetic sheet 5, a permanent magnet 6, a cover plate 7, an upper cover body 8, a resistor 9, an inductor 10, a connector 11, a circuit board 12, and a capacitor 13. The upper cover body 8 and the lower cover body 1 are movably connected together to form a closed cavity structure; the inner conductor 2, the lower ferrite 3, the upper ferrite 4, the magnetic sheet 5, the permanent magnet 6 and the cover plate 7 are sequentially arranged on one side of the cavity structure, the circuit board 12 is arranged on the other side of the cavity structure, the resistor 9 is arranged on one side of the lower cover body 1, the inductor 10 and the capacitor 13 are arranged on the circuit board 12, and the connector 11 is arranged on both sides of the component.

[0024] The closed cavity structure formed by the upper cover body 8 and the lower cover body 1 being movably connected together can protect the internal components from interference from the external environment.

[0025] In specific implementation, the lower cover 1, the cover plate 7, and the upper cover 8 can all be made of polytetrafluoroethylene PTFE, polyethylene PE, ceramic materials or composite materials. Polytetrafluoroethylene PTFE, polyethylene PE, ceramic materials or composite materials are characterized by high strength and strong corrosion resistance, and can effectively prevent erosion by external corrosive media.

[0026] In a specific implementation, the upper cover body 8 and the cover plate 7 can also be tightly fixed together by means of bolts or snaps to form the outer shell of the isolator to protect the internal magnetic field system and circuit parts.

[0027] In specific implementation, the upper cover 8 and the lower cover 1 can be movably connected together by a screw cap structure. The upper cover 8 and the lower cover 1 serve as the external protection structure of the isolator to ensure the sealing and durability of the isolator.

[0028] The screw cap structure is not only used to fix and seal the isolator, but also to change the state of the magnetic field system by adjusting the tightness of the screw cap. When the screw cap is tightened, the stability of the magnetic field system is enhanced; when the screw cap is loosened, the stability of the magnetic field system is weakened. This adjustment method enables the isolator to maintain stable performance under different working conditions. In order to meet the requirements of magnetic shielding, the entire cavity structure can be processed with easy-to-cut iron with high iron content.

[0029] The permanent magnet 6 and the magnetic conductive sheet 5 can be installed in the cavity structure by pasting or embedding to provide a magnetic field and enhance the isolation performance of the component. The permanent magnet 6 provides a stable magnetic field, while the magnetic conductive sheet 5 is used to guide and enhance the magnetic field, together forming the magnetic field system of the isolator.

[0030] In specific implementation, the permanent magnet 6 can also be installed on the magnetic conductive sheet 5 by adhesive or mechanical fixing, and the magnetic conductive sheet 5 is fixed to the inner wall of the cavity by bolts or welding. The close cooperation between the permanent magnet 6 and the magnetic conductive sheet 5 ensures the stability and uniform distribution of the magnetic field.

[0031] The upper ferrite 4 and the lower ferrite 3 are a kind of magnetic material with high magnetic permeability and low loss, which are used to form the magnetic circuit of the isolator. They can be fixed in the cavity structure by bolts and the like, and together with the permanent magnet 6 and the magnetic conductive sheet 5, form a magnetic field loop. The upper ferrite 4 and the lower ferrite 3 are used to enhance and adjust the magnetic field, thereby achieving effective isolation of the signal.

[0032] In specific implementation, the upper ferrite 4 and the lower ferrite 3 can be installed at the upper and lower ends of the isolator respectively, and fixed together with the cavity structure by bolts or welding. It should be noted that the position and quantity of the upper ferrite 4 and the lower ferrite 3 are adjusted according to design requirements to achieve the best magnetic field effect.

[0033] The inner conductor 2 is the core part of the component, and can be connected with the circuit board 12, the inductor 10 and other components by assembly and welding to form a signal transmission path. As a channel for signal transmission, the inner conductor 2 can adopt a double Y-junction butterfly resonant structure to improve the signal transmission efficiency and isolation performance. The design of the inner conductor 2 using a double Y-junction butterfly resonant structure brings multiple benefits in the microwave and radio frequency fields.

[0034] The design of the inner conductor 2 with a double Y-knot butterfly resonant structure greatly enhances the frequency selection performance. The double Y-knot butterfly resonant structure can accurately form resonance within a specific frequency range, effectively reflecting the microwave signal and returning it to the input port. Outside the resonant frequency, the signal will be transmitted to the output port. This characteristic makes the structure perform well in filtering and selecting frequency bands in microwave communication systems, ensuring the quality and stability of signal transmission.

[0035] The double Y-junction butterfly resonant structure has a high quality factor and low insertion loss. The high quality factor means that the resonator can maintain oscillation for a longer time, while the low insertion loss reduces the energy loss of the signal during transmission, thereby improving the efficiency of the overall system. This is crucial for microwave applications that require high precision and low loss, such as radar, satellite communications, and microwave imaging.

[0036] The inner conductor 2 adopts a double Y-knot butterfly resonant structure, which has strong anti-interference ability and high stability. In a complex working environment, the double Y-knot butterfly resonant structure can effectively resist external interference and keep the signal clear and stable. This is of great significance for ensuring the reliability and stability of the communication system, especially in an environment susceptible to interference, such as a densely populated urban area or near an electromagnetic interference source.

[0037] The design of the double Y-junction butterfly resonant structure also brings structural advantages. It can achieve miniaturization and planarization of the structure, meeting the strict requirements of modern communication systems on hardware size and weight. At the same time, this design also has a high power tolerance and can cope with the transmission requirements of high-power signals, allowing the system to maintain stable operation under high-voltage and high-speed signal environments.

[0038] It should be noted that the shape and size of the inner conductor 2 can be customized according to actual needs to ensure signal transmission efficiency and isolation performance.

[0039] The upper cover 8, cover plate 7, permanent magnet 6, magnetic conductive sheet 5, upper ferrite 4, lower ferrite 3, inner conductor 2 and lower cover 1 together constitute a broadband isolator. The operating frequency of the broadband isolator is set to 840-1400MHz, and its relative operating bandwidth is 50%.

[0040] The connector 11 can be connected to the circuit board 12 and the inner conductor 2 by welding or threading. The connector 11 is used to connect the broadband isolator to the external circuit to ensure smooth signal transmission. It should be noted that the selection and design of the connector 11 must meet the communication standards and interface requirements to ensure smooth signal transmission and system compatibility.

[0041] The resistor 9, the inductor 10 and the capacitor 13 together constitute the circuit part of the filter. By adjusting their parameters, filtering of signals of different frequencies can be achieved.

[0042] The circuit board 12 can be connected to the cavity structure by bolts. The circuit board 12 serves as a carrier of the filter. The circuit board 12 arranges and connects components such as the resistor 9, the inductor 10 and the capacitor 13 in an orderly manner to form a complete filter circuit.

[0043] In specific implementation, a low-pass filter is provided at the rear side of the cavity structure. In order to obtain a steeper suppression curve and reduce the product size, the low-pass filter is preferably a low-pass filter of an LC structure, which is used to further suppress high-frequency noise and interference signals and improve the purity of the signal. The LC structure low-pass filter can be connected to the filter circuit of the circuit board 12 by welding or plug-in. It should be noted that the design and parameter selection of the LC structure low-pass filter can be adjusted according to specific filtering requirements and system requirements.

[0044] The resistor 9, the inductor 10, the capacitor 13, the circuit board 12 and the LC structure low-pass filter together constitute a filter.

[0045] The working principle of the broadband isolator composed of the upper cover, cover plate, permanent magnet, magnetic conductive sheet, upper ferrite, lower ferrite, inner conductor and lower cover is: As a microwave device used to prevent signal reflection and interference, it uses the interaction principle of magnetic field and electromagnetic wave to isolate the input signal from the output signal. When the input signal enters the isolator, it will be affected by the magnetic field formed by the permanent magnet and the magnetic conductive sheet. The magnetic field deflects the electromagnetic wave of the input signal, thereby changing the propagation direction of the signal.

[0046] The non-reciprocal nature of an isolator allows signals to travel in only one direction. When a signal travels from the input to the output, it is allowed to pass; when a signal is reflected from the output back to the input, it is blocked by the isolator.

[0047] The working principle of the filter composed of resistors, inductors, capacitors, circuit boards and LC structure low-pass filters is: A filter is a circuit element used to perform frequency selective processing on a signal. It uses the impedance characteristics of circuit elements (such as resistors, inductors, capacitors, etc.) to filter and select signals of different frequencies.

[0048] The frequency response characteristics of a filter determine how it responds to signals of different frequencies. Depending on the low-pass type of the filter, it can selectively pass or reject signals of specific frequencies.

[0049] In order to achieve effective signal transmission and filtering, the filter needs to have good impedance matching with the external circuit. This is usually achieved by adjusting the input and output impedance of the filter and selecting appropriate circuit components and connection methods.

[0050] The circuit network of the filter is composed of multiple circuit elements, which are connected together in series, parallel, etc. to form a specific circuit structure. These circuit structures determine the frequency response characteristics and filtering performance of the filter.

[0051] In the circuit network of the filter, the resonance phenomenon is an important factor. By adjusting the parameters and connection methods of the circuit components, resonance and attenuation of specific frequency signals can be achieved. This helps to enhance the frequency selectivity of the filter and suppress out-of-band interference signals.

[0052] The working principle of the P-band broadband isolation filter assembly in this embodiment is: The isolator and filter are combined together to achieve signal isolation and filtering.

[0053] When the input signal enters this component, it is first processed by the isolator. The isolator uses the interaction principle of magnetic field and electromagnetic wave to isolate the input signal from the reflected signal to prevent signal reflection and interference.

[0054] After the input signal is processed by the isolator, the signal continues to be transmitted to the filter part. The filter uses the impedance characteristics of the circuit elements to perform frequency selective processing on the signal. Depending on the type and design parameters of the filter, it can selectively pass or suppress signals of specific frequencies.

[0055] During the entire transmission process, this component needs to have good impedance matching with the external circuit to ensure effective signal transmission and filtering.

[0056] After being processed by the isolator and the filter, the final output signal is a pure signal that has been processed with frequency selectivity. It has a high signal-to-noise ratio and a low interference level, and is suitable for the application requirements of various electronic systems.

[0057] Figure 6 Schematic diagram of the application scenario of the P-band broadband isolation filter component of the present invention. Figure 6 As shown in the figure, TX1, TX2, ..., TXn represent signal transmission lines or transmission channels. The TX line is used to connect the transmitter and the receiver to transmit and receive signals. TX1 represents the first signal transmission channel, which is used to send data or instructions. As n increases, TXn represents more signal transmission channels to meet the complex data transmission requirements in the circuit.

[0058] BPF1, BPF2, ..., BPFn represent feedback lines or feedback function modules. In the isolator circuit, the feedback line is used to send the received signal or status information back to the transmitter to monitor and adjust the circuit status. For example, BPF1 represents the first feedback channel, which is used to receive and process the feedback signal from the first receiver. Similarly, as n increases, BPFn represents more feedback channels to meet more complex monitoring and adjustment requirements in the circuit.

[0059] In the design of isolator circuits, the markings of the TX and BPF series not only help to achieve efficient signal transmission and precise control of the circuit, but also improve the stability and reliability of the circuit. By rationally arranging these transmission and feedback channels, engineers can ensure that the circuit can work properly under various conditions and realize real-time monitoring and adjustment of the circuit status.

[0060] These markings also help engineers quickly locate the problem when a circuit fails and take effective measures to repair it.

[0061] The isolator is also called a unidirectional device. Its outstanding feature is that the signal can only be transmitted in one direction, and the reflected signal is absorbed by the power resistor of the isolator. Figure 6 The scenario shown can be widely used in various communication base stations, radars, reactors and other systems to eliminate interference between transmitter paths, match and optimize circuit impedance, absorb reflected signals and protect the front-stage power amplifier tube.

[0062] This embodiment is particularly suitable for use in a multi-frequency synthesis communication system, has a high harmonic suppression effect, and can effectively reduce the interference and impact of the current transmission frequency on signals of other bands when transmitting signals.

[0063] The present invention has the following beneficial effects through the design of the above embodiments: First, the broadband isolation and filter are designed as an integrated whole. The isolator adopts a screw-cap structure. To meet the magnetic shielding requirements, the entire cavity is processed with easy-to-cut iron with high iron content. The filter is directly added to the output end of the isolator without a transition zone, which effectively reduces the overall size of the component. Secondly, the isolator adopts a broadband design with low magnetic saturation intensity. The inner conductor adopts double Y-junction butterfly resonance. By performing secondary impedance changes on the circuit port, the product can meet the working bandwidth requirements of one-fold frequency. Third, to meet the requirements of harmonic suppression, a low-pass filter is added after the isolator. In order to obtain a steeper suppression curve and reduce the product size, an LC structure pass filter is used, which has stronger electrical performance.

[0064] Fourthly, this component is small in size, light in weight, highly reliable, and has high harmonic suppression function, so that the multi-frequency synthesis radar system will not interfere with other band signals, and the whole system will work more stably, which can be widely used in radar, communication and other electronic systems.

[0065] The present invention is described with reference to specific embodiments, but it should be understood by those skilled in the art that various changes and equivalent substitutions may be made without departing from the scope of the present invention. In addition, in order to adapt to specific occasions of the present invention, the present invention may be modified in many ways without departing from its scope of protection. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the scope of protection of the claims.

Claims

1. A P-band broadband isolation filter component, characterized in that: include: A lower cover, an inner conductor, a lower ferrite, an upper ferrite, a magnetic conductive sheet, a permanent magnet, a cover plate, an upper cover, a resistor, an inductor, a connector, a circuit board, and a capacitor. The upper cover and the lower cover are movably connected together to form a closed cavity structure; the inner conductor, the lower ferrite, the upper ferrite, the magnetic conductive sheet, the permanent magnet and the cover plate are sequentially arranged on one side of the cavity structure, the circuit board is arranged on the other side of the cavity structure, the resistor is arranged on one side of the lower cover, the inductor and the capacitor are arranged on the circuit board, and the connector is arranged on both sides of the component.

2. The P-band broadband isolation filter assembly according to claim 1, characterized in that: The inner conductor adopts a double Y-junction butterfly resonance structure.

3. The P-band broadband isolation filter assembly according to claim 1, characterized in that: The upper ferrite is fixed in the cavity structure by bolts.

4. The P-band broadband isolation filter assembly according to claim 1, characterized in that: The lower ferrite is fixed in the cavity structure by bolts.

5. The P-band broadband isolation filter assembly according to claim 1, characterized in that: The connector is connected to the circuit board and the inner conductor by welding or threading.

6. The P-band broadband isolation filter assembly according to claim 1, characterized in that: The circuit board is connected to the cavity structure through bolts.

7. The P-band broadband isolation filter assembly according to claim 1, characterized in that: A low-pass filter is arranged at the rear side of the cavity structure.

8. The P-band broadband isolation filter assembly according to claim 1, characterized in that: The lower cover body, the cover plate and the upper cover body are all made of polytetrafluoroethylene PTFE, polyethylene PE, ceramic material or composite material.

9. The P-band broadband isolation filter assembly according to claim 7, characterized in that: The low-pass filter is a low-pass filter with an LC structure.

10. The P-band broadband isolation filter assembly according to any one of claims 1 to 9, characterized in that: The upper cover body and the lower cover body are movably connected together by a screw cover structure.

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