Signal transition device based on strip line
By designing a strip line signal transition device, the combination of embedded strip line, radio frequency insulator and SSMP connector in the cavity is solved, and the signal connection problem of adjacent surfaces is achieved efficient signal transmission and space savings are achieved, and costs are reduced.
Patent Information
- Application Number
- CN202311226512.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-22
- Publication Date
- 2025-03-25
AI Technical Summary
In microwave communication technology, adjacent surface signals need to be connected but cannot be sealed, resulting in signal leakage, reflection, increased loss and poor flatness, affecting the transmission quality of the signal.
A strip line signal transition device is designed, including a strip line embedded in a cavity, a radio frequency insulator, an SSMP connector and a signal transmission structure. The strip line is connected to the cavity and other components through sintering and tin ring welding to realize the function of transmitting signals from the back to the front.
It solves the problem of signal connection between adjacent surfaces, saves space, improves the utilization rate of the cavity, is low in cost, and has a similar effect to LTCC. It has a simple structure for easy installation and replacement.
Smart Images
Figure CN119695430A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of microwave communications, and in particular to a signal transition device based on a stripline. Background Art
[0002] In recent years, with the rapid development of radar technology, the trend of integration and miniaturization of microwave circuits has become increasingly obvious. Due to the space utilization problem of microwave layout, signals often need to be transferred from one module to another. At the same time, if the modules need to be sealed, then traditional cable connections are definitely not feasible. They must be connected through sealed joints to ensure that they are sealed intact. Therefore, the transmission on the adjacent surfaces of the modules cannot be directly transmitted through the connector. The signal needs to be transmitted to the back of the module and then transmitted to the next module through the connector. Moreover, a good transition method will be very critical. If the match is not good, it will lead to signal leakage, signal reflection, increased loss, poor flatness, poor consistency of multiple groups of signals, and amplifier self-excitation. Due to the space utilization problem of microwave layout, signals often need to be transferred from one surface to another. The traditional way is through the conversion between microstrip lines. Microstrip lines take up a large space, and air cavities need to be left in both parts, resulting in low space utilization;
[0003] Therefore, a better transition device is urgently needed. Summary of the invention
[0004] In view of this, an embodiment of the present invention provides a stripline signal transition device to solve the problem that adjacent surface signals need to be connected but cannot be sealed.
[0005] In a first aspect, an embodiment of the present invention provides a stripline signal transition device, characterized in that the device comprises: a cavity having an embedded stripline inside; an RF insulator, a transmission needle being provided at one end of the RF insulator, the RF insulator being sintered to the cavity, and the transmission needle being connected to the stripline; an SSMP connector being sintered to the cavity and connected to the stripline; and a signal transmission structure for transmitting a signal from the back side to the front side; wherein the RF insulator is fixedly connected to the stripline by tin ring welding.
[0006] As a preferred technical solution of this embodiment, the strip line is provided with a hole which is coaxial with and perpendicular to the transmission needle at the contact point with the transmission needle of the radio frequency insulator.
[0007] As a preferred technical solution of this embodiment, a needle is provided at one end of the SSMP connector, and a hole which is coaxial with and perpendicular to the needle is provided at the contact point of the strip line with the needle of the SSMP, and the needle is connected to the strip line by welding.
[0008] As a preferred technical solution of this embodiment, the stripline includes an inner layer and an outer layer, the outer layer of the stripline has no copper foil, and one side of the outer layer of the stripline is pressed on the inner layer as the dielectric layer of the stripline.
[0009] As a preferred technical solution of this embodiment, the stripline is made of 5880 material, has a total thickness of 0.254mm, an inner layer thickness of 0.127mm, and is horizontally sintered on the cavity; the outer layer of the stripline is a dielectric layer and is provided with a hole;
[0010] The device also includes a cover plate with copper foil covering the strip line and locked by a screw.
[0011] As a preferred technical solution of this embodiment, the stripline signal transition device is further used to connect adjacent modules and realize signal transmission;
[0012] The strip line is sintered to the cavity through the RF insulator and connected on both sides by tin ring welding to transmit the signal to the back side. After passing through the strip line, the signal is transmitted to the front side through the SSMP connector sintered on the cavity.
[0013] As a preferred technical solution of this embodiment, the stripline is designed and optimized through simulation calculation so that the stripline has the following characteristics within a specific frequency band: the line width of the stripline is 0.15mm; the width of the substrate of the stripline is 2mm; the inner layer thickness is 0.127mm; the outer layer thickness is 0.127mm; the total thickness of the stripline is 0.254mm; the copper foil thickness is 0.5oz, and a metallization treatment of a preset thickness is performed; it has a loss of less than 0.2dB; and it has a return loss of more than 20dB.
[0014] In summary, the beneficial effects of the present invention are as follows:
[0015] In order to solve the above technical problems, the present invention proposes a stripline transition device, the device comprising: a cavity, inside which there is a buried stripline; an RF insulator, one end of which is provided with a transmission needle, the RF insulator is sintered to the cavity, and the transmission needle is connected to the stripline; an SSMP connector is sintered to the cavity and connected to the stripline; a signal transmission structure that transmits the signal from the back to the front; wherein the RF insulator is fixedly connected to the stripline by tin ring welding. You only need to bury the stripline in the middle of the cavity, and you can also put other things on it.
[0016] The above settings solved:
[0017] 1. Solved the problem that adjacent surface signals need to be connected but cannot be sealed;
[0018] 2. The air cavity left by the microstrip line occupies a large amount of space, which saves a lot of space and improves the utilization rate of the cavity without affecting the indicators;
[0019] 3. This method is much cheaper than the LTCC method and can achieve the same effect;
[0020] 4. The structure is relatively simple, which is convenient for installation, testing and replacement. 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 cross-sectional view of a stripline transition mode of a stripline signal transition device;
[0023] Figure 2 It is a hierarchical relationship cross-sectional view of a stripline signal transition device;
[0024] Figure 3 It is a stripline profile diagram of a stripline signal transition device;
[0025] Figure 4 It is a stripline transition simulation curve of a stripline-based signal transition device;
[0026] Parts and numbers in the figure: 1-first hole, 2-second hole, 3-inner layer, 4-outer layer, 5-cover plate. 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 stripline signal transition device, characterized in that the device includes: a cavity, in which a stripline is buried; an RF insulator, one end of which is provided with a transmission needle, the RF insulator is sintered to the cavity, and the transmission needle is connected to the stripline; an SSMP connector is sintered to the cavity and connected to the stripline; a signal transmission structure that transmits the signal from the back to the front; wherein the RF insulator is fixedly connected to the stripline by tin ring welding.
[0030] As a preferred technical solution of this embodiment, the strip line is provided with a first hole 1 which is coaxial with and perpendicular to the transmission needle at the contact point with the transmission needle of the radio frequency insulator;
[0031] As a preferred technical solution of this embodiment, a needle is provided at one end of the SSMP connector, and a second hole 2 is provided at the contact point of the strip line with the needle of the SSMP, which is coaxial with and perpendicular to the needle, and the needle is connected to the strip line by welding.
[0032] As a preferred technical solution of this embodiment, the stripline includes an inner layer 3 and an outer layer 4, the outer layer of the stripline has no copper foil, and one side of the outer layer 4 of the stripline is pressed on the inner layer 3 as the dielectric layer of the stripline.
[0033] As a preferred technical solution of this embodiment, the strip line is made of 5880 material, has a total thickness of 0.254mm, the inner layer 3 is 0.127mm thick, and is horizontally sintered on the cavity; the outer layer 4 of the strip line is a dielectric layer and is provided with a hole; this is a hole set to prevent it from short circuiting; at the same time, it can also provide it with good grounding. The device also includes a cover plate 5 with copper foil covering the strip line, which is locked by a screw to prevent loosening.
[0034] As a preferred technical solution of this embodiment, the stripline signal transition device is further used to connect adjacent modules and realize signal transmission; wherein, the stripline is sintered to the cavity through the RF insulator, and the two sides are connected by tin ring welding to transmit the signal to the back side, and after passing through the stripline, the signal is transmitted to the front side through the SSMP connector sintered to the cavity.
[0035] As the preferred technical solution of this embodiment, the stripline is designed and optimized through simulation calculation, so that it has the following characteristics in a specific frequency band: the line width of the stripline is 0.15mm; the width of the substrate is 2mm; the inner layer thickness is 0.127mm; the outer layer thickness is 0.127mm; the total thickness of the stripline is 0.254mm; the copper foil thickness is 0.5oz, and a metallization treatment of a preset thickness is performed; the metallization treatment of the preset thickness is generally a gold plating treatment of a thickness of 2um; the loss is less than 0.2dB; the return loss is greater than 20dB. The stripline signal transition device is further used to connect adjacent modules and realize signal transmission.
[0036] Among them, the buried stripline is sintered to the cavity through the RF insulator, and the two sides are connected by tin ring welding to transmit the signal to the back. After passing through the stripline, the signal is transmitted to the front through the SSMP connector sintered on the cavity. The stripline signal transition device also includes a sealing structure of adjacent modules, which adopts the same RF insulator sintering and welding method, wherein the material of the stripline is 5880 series high-frequency dielectric material, which has excellent high-frequency characteristics and durability. The RF insulator is connected to the cavity by tin ring welding to ensure stable signal transmission and good mechanical strength. The width and structure of the stripline are simulated and optimized to achieve the best impedance matching and signal transmission effect. The SSMP connector has good electrical connection performance and reliable signal transmission characteristics. The inner and outer layers of the stripline adopt appropriate materials and thicknesses to achieve the best signal transmission and noise suppression effect. The return loss of the stripline is greater than 20dB, ensuring effective signal transmission and reducing signal loss.
[0037] The present invention solves the problem that signals on adjacent surfaces need to be connected but cannot be sealed through the above-mentioned arrangement; the large amount of space occupied by the air cavity left by the microstrip line saves a large amount of space without affecting the indicators, thereby improving the utilization rate of the cavity; compared with the LTCC method, this method has a very low cost and can achieve the same effect; the structure is relatively simple, and it is convenient to install, test and replace.
[0038] 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 stripline signal transition device, characterized in that: The device comprises: a cavity having a stripline buried therein; A radio frequency insulator, one end of which is provided with a transmission needle, the radio frequency insulator is sintered to the cavity, and the transmission needle is connected to the strip line; an SSMP connector sintered to the cavity and connected to the ribbon wire; a signal transmission structure for transmitting a signal from the back side to the front side; Wherein, the radio frequency insulator is fixedly connected to the strip line by tin ring welding.
2. The stripline signal transition device according to claim 1, characterized in that: The strip line is provided with a hole at a contact point with a transmission needle of the radio frequency insulator, which is coaxial with and perpendicular to the transmission needle.
3. The stripline signal transition device according to claim 1, characterized in that: One end of the SSMP connector is provided with a needle, and the strip line is provided with a hole which is coaxial with and perpendicular to the needle at the contact point with the needle of the SSMP, and the needle is connected to the strip line by welding.
4. The stripline signal transition device according to claim 3, characterized in that: The stripline includes an inner layer and an outer layer, the outer layer of the stripline has no copper foil, and one side of the outer layer of the stripline is pressed on the inner layer as a dielectric layer of the stripline.
5. The stripline signal transition device according to claim 4, characterized in that: The stripline is made of 5880 material, has a total thickness of 0.254 mm, an inner layer thickness of 0.127 mm, and is horizontally sintered on the cavity; the outer layer of the stripline is a dielectric layer and is provided with a hole; The device also includes a cover plate with copper foil covering the strip line and locked by a screw.
6. The stripline signal transition device according to claim 1, characterized in that: The stripline signal transition device is further used to connect adjacent modules and realize signal transmission; The strip line is sintered to the cavity through the RF insulator and connected on both sides by tin ring welding to transmit the signal to the back side. After passing through the strip line, the signal is transmitted to the front side through the SSMP connector sintered on the cavity.
7. The stripline signal transition device according to claims 1 to 6, characterized in that: The stripline is designed and optimized through simulation calculation, so that the stripline has the following characteristics within a specific frequency band: The line width of the strip line is 0.15mm; the width of the substrate of the strip line is 2mm; the inner layer thickness is 0.127mm; the outer layer thickness is 0.127mm; the total thickness of the strip line is 0.254mm; the copper foil thickness is 0.5oz, and a metallization treatment of a preset thickness is performed; it has a loss of less than 0.2dB; and it has a return loss of greater than 20dB.