K-band signal transmission conversion device and conversion method thereof

Abstract

The invention relates to the technical field of microwave communication, and particularly discloses a K-band signal transmission conversion device and a conversion method thereof. Compared with a traditional signal transmission and conversion mode, the K-band signal transmission and conversion method has the advantages that impedance matching of signals and through hole transmission design of fuzz buttons are added, through impedance design of the through holes, the mounting stability and reliability of the fuzz buttons can be guaranteed, meanwhile, it can be guaranteed that loss is smaller in the signal transmission process, and the signal transmission efficiency is improved. The anti-interference capability is stronger, and the reliable connection is realized; and the performance is simulated after modeling, so that the indexes in the whole frequency band are very excellent from the simulation result, any frequency band in the K wave band can be completely met, and the universality of the K wave band can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave communications, and in particular to a K-band signal transmission conversion device and a conversion method thereof. Background Art

[0002] Since the K-band phased array system has the characteristics of high precision, strong anti-interference ability and small size, the core of the three-dimensional assembly is to achieve reliable connection between the stacking of various functional modules and the signals between layers. Among them, the wool button is a connector without welding technology that is widely used in the system.

[0003] The wool button is made of gold-plated metal wire woven in a certain way, compressed along the axial direction, and relies on elastic contact to transmit signals. It is often used for elastic connection of inner conductors, and can also assist in the connection of outer conductors when installed on them.

[0004] The button connector can realize solderless compression interconnection, meet the needs of high-speed transmission, and is suitable for application in the fields of military, aerospace, automobile, etc. This technology has the advantages of reliable connection, excellent performance, easy disassembly and low cost.

[0005] However, the traditional wool buttons are directly in contact with the microstrip line contacts on the top layer of the printed circuit board. Although this can solve the signal connection between the stacked layers, it is not well matched during the high-frequency signal transmission process, resulting in poor signal anti-interference ability and large transmission loss.

[0006] Therefore, there is an urgent need for a conversion method that can solve the problems of poor anti-interference ability, large transmission loss and poor matching of traditional wool button transmission. Summary of the invention

[0007] In view of this, an embodiment of the present invention provides a K-band signal transmission conversion device to solve the problems of poor anti-interference ability, large transmission loss and poor matching of traditional wool button transmission.

[0008] In the first aspect, an embodiment of the present invention provides a K-band signal transmission and conversion device, characterized in that it includes an electrical connector and a multilayer printed board; the multilayer printed board is composed of multiple insulating layers and conductive layers, and the multilayer printed board includes at least two layers of printed boards, and each layer of the printed board is electrically connected to the inner layer through a through hole; the top layer of the multilayer printed board is provided with conductive contact points, button mounting holes, signal contacts, impedance matching microstrip lines and strip lines; the electrical connector is vertically electrically connected to the multilayer printed board through the conductive contact points; the impedance matching microstrip line and the strip line are electrically connected; the electrical connector includes an elastic electrical connector button; the button includes an outer conductor and an inner conductor; the outer conductor includes a first outer conductor and a second outer conductor; the lower end surface of the button is in direct conductive contact with the signal contact on the multilayer printed board.

[0009] As a preferred technical solution of this embodiment, the interconnection principle of the vertical interconnection between the wool button and the multilayer printed circuit board is:

[0010] The wool button will produce a certain elastic deformation after mechanical pressing, and provide a certain axial positive stress, thereby realizing a solderless connection with the multi-layer printed circuit board.

[0011] As a preferred technical solution of this embodiment, the wool button includes a coaxial wool button, wherein the inner conductor of the wool button is used for signal transmission and the outer conductor is used for grounding.

[0012] As a preferred technical solution of this embodiment, the wool button includes an interference fit in the wool button mounting hole for fixation; at the conductive contact point where the wool button contacts the multilayer printed circuit board, a pad and a through hole are used for installation.

[0013] As a preferred technical solution of this embodiment, the pads at the contact points on the multilayer printed circuit board are isolated by using ground holes.

[0014] In a second aspect, a K-band signal transmission conversion method is provided, characterized in that the transmission conversion method comprises:

[0015] S1: After the signal is input into the multilayer printed circuit board through the inner conductor of the wool button, it first passes through the signal contact on the top layer of the multilayer printed circuit board, and then is transmitted to the impedance matching microstrip line on the bottom layer of the multilayer printed circuit board through the through-hole design of the signal contact;

[0016] S2: When the signal enters the impedance matching microstrip line, the impedance of the impedance matching microstrip line is designed to ensure that the output signal impedance can match the impedance matching microstrip line for transmission, thereby achieving maximum transmission efficiency during signal transmission;

[0017] S3: After the impedance is matched by the impedance matching microstrip line, the signal is transmitted to the strip line on the top layer for output.

[0018] In summary, the beneficial effects of the present invention are as follows:

[0019] In order to solve the above technical problems, an embodiment of the present invention provides a K-band signal transmission conversion device and a conversion method thereof; compared with the traditional signal transmission conversion method, the K-band signal transmission conversion method of the present invention adds signal impedance matching and a through-hole transmission design of the wool button. Through the impedance design of the through-hole, not only the installation stability and reliability of the wool button can be guaranteed, but also the loss in the signal transmission process can be smaller, the anti-interference ability is stronger, and reliable connection is provided;

[0020] And after modeling, the performance is simulated. From the simulation results, the indicators in the entire frequency band are very excellent, which can fully meet the requirements of any frequency band in the K band and can achieve universal use in the K band. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment of the present invention will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the present invention.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a K-band signal transmission and conversion device;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of a K-band signal transmission conversion device from another angle;

[0024] Figure 3 It is a bottom view of a K-band signal transmission conversion device;

[0025] Figure 4 It is a simulation result diagram of a K-band signal transmission conversion device and a conversion method thereof;

[0026] Parts and numbers in the figure: 10-wool button, 20-through hole, 30-strip line, 40-signal contact, 50-impedance matching microstrip line. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described in conjunction with the drawings in the embodiment of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application 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 a limitation of the present invention. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In the absence of further restrictions, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. If there is no conflict, the various features in the embodiments and examples of the present invention can be combined with each other, all within the scope of protection of the present invention.

[0028] Example 1

[0029] See also Figures 1 to 4 , an embodiment of the present invention provides a K-band signal transmission conversion device, characterized in that it includes an electrical connector and a multilayer printed circuit board;

[0030] The multilayer printed circuit board is composed of multiple insulating layers and conductive layers, and the multilayer printed circuit board includes at least two layers of printed circuit boards, and each layer of the printed circuit board is electrically connected to the inner layer through a through hole provided; the top layer of the multilayer printed circuit board is provided with a conductive contact point, a wool button mounting hole, a signal contact 40, an impedance matching microstrip line 50 and a strip line 30; the electrical connector is vertically electrically connected to the multilayer printed circuit board through the conductive contact point; the interconnection principle of the vertical interconnection between the wool button and the multilayer printed circuit board is: the wool button will produce a certain elastic deformation after mechanical pressing, and at the same time provide a certain axial positive stress, thereby realizing a solderless connection with the multilayer printed circuit board, which has the advantages of shorter interconnection path, low profile, long life, strong mechanical vibration resistance, good microwave performance, and relatively simple process;

[0031] As a preferred technical solution of this embodiment, the wool button includes a coaxial type wool button, wherein the inner conductor of the wool button is used for signal transmission, and the outer conductor is used for grounding; in order to ensure the anti-interference of signal transmission, the wool button 10 uses a coaxial type wool button 10, wherein the inner conductor part of the wool button 10 is used for signal transmission, and the outer conductor part is used for grounding, which can well protect the signal from interference from other signals during the transmission process;

[0032] As a preferred technical solution of this embodiment, the wool button includes interference fitting in the wool button mounting hole for fixing; at the conductive contact point where the wool button contacts the multilayer printed circuit board, it is installed in the form of a pad and a through hole; the impedance matching microstrip line 50 is electrically connected to the strip line 30; the electrical connector includes an elastic electrical connector wool button 10; the wool button 10 includes an outer conductor and an inner conductor; the outer conductor includes a first outer conductor and a second outer conductor; the lower end surface of the wool button is in direct conductive contact with the signal contact 40 on the multilayer printed circuit board; At the conductive contact point where the wool button 10 contacts the multilayer printed circuit board, the use of pads and through holes can effectively ensure the reliability and stability of the contact point and prevent the contact point from sliding; at the same time, it can also ensure the poor contact state after a long time, and fully ensure the stability and reliability of signal transmission; when designing the contact point of the multilayer printed circuit board, the impedance of the pads and through holes is designed to ensure the transmission impedance of the signal; as the preferred technical solution of this embodiment, the pads at the contact points of the multilayer printed circuit board are isolated by ground holes.

[0033] Example 2

[0034] See also Figures 1 to 4 The embodiment of the present invention provides a K-band signal transmission conversion method, characterized in that the transmission conversion method comprises:

[0035] S1: After the signal is input into the multilayer printed circuit board through the inner conductor of the wool button 10, it first passes through the signal contact 40 on the top layer of the multilayer printed circuit board, and then is transmitted to the impedance matching microstrip line 50 on the bottom layer of the multilayer printed circuit board through the through hole 20 of the signal contact 40;

[0036] S2: After the signal enters the impedance matching microstrip line 50, the impedance matching microstrip line 50 is designed to ensure that the output signal impedance can match the impedance matching microstrip line 50 for transmission, thereby achieving maximum transmission efficiency during signal transmission and achieving the purpose of low loss;

[0037] S3: After the impedance is matched by the impedance matching microstrip line, the signal is transmitted to the strip line on the top layer for output.

[0038] A design structure model of a K-band signal transmission conversion device is shown in FIG. Figures 1 to 3 As shown in the figure, ground holes are used to isolate the contact pads on the printed circuit board to ensure that the impedance of the signal does not change after passing through the through hole, and at the same time, the anti-interference ability of the signal transmission process can be increased; after modeling, the performance is simulated, and the transmission loss and return loss are obtained as shown in the figure. Figure 4 As shown, from the simulation results, the indicators in the entire frequency band are very excellent, which can fully meet the requirements of any frequency band in the K band and realize the universal use of the K band. Compared with the traditional signal transmission and conversion method, the K-band signal transmission and conversion method of the present invention adds the impedance matching of the signal and the transmission design of the through-hole 20 of the wool button 10. Through the impedance design of the through-hole 20, it can not only ensure the installation stability and reliability of the wool button 10, but also ensure that the loss during signal transmission is smaller and the anti-interference ability is stronger. And the performance is simulated after modeling. From the simulation results, the indicators in the entire frequency band are very excellent, which can fully meet the requirements of any frequency band in the K band and realize the universal use of the K band.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A K-band signal transmission conversion device, characterized in that: Including electrical connectors and multilayer printed circuit boards; The multilayer printed circuit board is composed of a plurality of insulating layers and conductive layers, and the multilayer printed circuit board includes at least two layers of printed circuit boards, and each layer of the printed circuit board is electrically connected to the inner layer through a through hole provided therein; The top layer of the multilayer printed board is provided with conductive contact points, button mounting holes, signal contacts, impedance matching microstrip lines and strip lines; The electrical connector is vertically electrically connected to the multilayer printed circuit board through the conductive contact point; the impedance matching microstrip line is electrically connected to the stripline; The electrical connector comprises an elastic electrical connector button; the button comprises an outer conductor and an inner conductor; the outer conductor comprises a first outer conductor and a second outer conductor; the lower end surface of the button is in direct conductive contact with the signal contact on the multilayer printed circuit board.

2. The signal transmission conversion device according to claim 1, characterized in that: The interconnection principle of the vertical interconnection between the wool button and the multilayer printed circuit board is: The wool button will produce a certain elastic deformation after mechanical pressing, and provide a certain axial positive stress, thereby realizing a solderless connection with the multi-layer printed circuit board.

3. The signal transmission conversion device according to claim 1, characterized in that: The wool button comprises a coaxial type wool button, wherein the inner conductor of the wool button is used for signal transmission and the outer conductor is used for grounding.

4. The signal transmission conversion device according to claim 1, characterized in that: The wool button is installed in the wool button installation hole for fixing; at the conductive contact point where the wool button contacts the multilayer printed circuit board, it is installed in the form of a pad and a through hole.

5. The signal transmission conversion device according to claim 4, characterized in that: The pads at the contact points on the multilayer printed circuit board are isolated by using ground holes.

6. A K-band signal transmission conversion method, characterized in that: The transmission conversion method comprises: S1: After the signal is input into the multilayer printed circuit board through the inner conductor of the wool button, it first passes through the signal contact on the top layer of the multilayer printed circuit board, and then is transmitted to the impedance matching microstrip line on the bottom layer of the multilayer printed circuit board through the through-hole design of the signal contact; S2: When the signal enters the impedance matching microstrip line, the impedance of the impedance matching microstrip line is designed to ensure that the output signal impedance can match the impedance matching microstrip line for transmission, thereby achieving maximum transmission efficiency during signal transmission; S3: After the impedance is matched by the impedance matching microstrip line, the signal is transmitted to the strip line on the top layer for output.

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