A switching structure for high-speed radio frequency signal transmission interconnection

Abstract

The application relates to the technical field of radio frequency signal connection, and particularly discloses a switching structure for high-speed radio frequency signal transmission interconnection; the switching structure is used for interconnection with an antenna and a radio frequency substrate, and comprises a substrate provided with a concave cavity matched with the radio frequency, a plurality of groups of supporting structures vertically arranged in the concave cavity, and a plurality of groups of connectors respectively arranged on the supporting structures and penetrating through the substrate at the bottom; the connector comprises a pin assembly sleeved in the supporting structure and an elastic electromagnetic shielding ring embeddedly arranged on the supporting structure and located outside the pin assembly; the other end of the elastic electromagnetic shielding ring penetrates through the supporting structure and is coaxially arranged with the pin assembly. The application meets the requirements of low loss and low profile, and simultaneously meets the requirements of high reliability and high electromagnetic shielding transmission interconnection, effectively reduces the insertion loss, improves the isolation, and effectively guarantees the signal transmission quality.

Description

Technical Field

[0001] This invention relates to the field of radio frequency signal interconnection technology, and more specifically, to an adapter structure for high-speed radio frequency signal transmission interconnection. Background Technology

[0002] The requirements for thinner and lighter active phased arrays are becoming increasingly stringent, and low loss, low profile, high reliability, and excellent electromagnetic shielding performance have become the basic characteristics of RF front-end interconnects.

[0003] Currently, the most common interconnection method for radio frequency is mainly cable transmission, with blind mating at both ends through radio frequency connectors. Cable / radio frequency connectors have high reliability, but due to their large size and low integration, they cannot meet the requirements of low profile design and cannot meet the needs of scenarios with strict size constraints.

[0004] With the development of cableless technology, new interconnection methods such as button-type components have recently emerged, which can effectively reduce cross-section and loss.

[0005] In existing technologies, button-type assemblies often employ a small number of grounding posts around the perimeter for electromagnetic shielding and form a coaxial-like structure to achieve RF transmission matching. However, as the operating frequency gradually increases and the bandwidth continues to expand, the matching degree and electromagnetic shielding performance of such button-type assemblies often fail to meet the requirements of high-performance transmission applications with low profiles and changing frequencies.

[0006] Therefore, there is an urgent need to design a new type of high-speed radio frequency signal transmission interconnection adapter configuration that takes into account the requirements of high reliability, low profile, low loss, ultra-wideband high electromagnetic shielding. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a switching structure for high-speed radio frequency signal transmission interconnection that can meet the requirements of high reliability and high electromagnetic shielding transmission interconnection while satisfying the requirements of low loss and low profile.

[0008] The solution adopted by this invention to solve the technical problem is:

[0009] An adapter structure for high-speed radio frequency signal transmission interconnection, used for interconnection with an antenna and a radio frequency substrate, includes a substrate with a cavity that is basically adapted to radio frequency, multiple sets of support structures vertically installed in the cavity, and multiple sets of connectors respectively installed on the support structures and with their bottoms passing through the substrate.

[0010] The connector includes a snap button assembly fitted within a support structure and an elastic electromagnetic shielding ring embedded in the support structure and located outside the snap button assembly; the other end of the elastic electromagnetic shielding ring passes through the support structure and is coaxially arranged with the snap button assembly.

[0011] Compared with the prior art, this invention uses an elastic electromagnetic shielding ring fitted on the outside of the button assembly to replace the grounding post in the prior art, thereby effectively improving electromagnetic compatibility, reducing signal interference, effectively improving the matching performance during ultra-wideband high-frequency operation, further reducing interconnection loss, and effectively improving system sensitivity and radiated power EIRP.

[0012] In some possible implementations,

[0013] The distance between the top surface of the elastic electromagnetic shielding ring and the top surface of the supporting structure is D, where D≥0.4mm.

[0014] In some possible implementations,

[0015] The distance between the top surface of the elastic electromagnetic shielding ring and the top of the button assembly is d, where d ≥ 0.1 mm.

[0016] In some possible implementations,

[0017] The bobby button assembly includes a medium support body installed within and coplanar with the support structure, and a bobby button installed within and coaxially arranged within the medium support body.

[0018] The two ends of the button pass through the elastic electromagnetic shielding ring and the substrate, respectively.

[0019] In some possible implementations,

[0020] The bobby button includes a radio frequency connection segment, an elastic telescopic segment, and an antenna connection segment connected coaxially in sequence.

[0021] The end of the antenna connection segment away from the radio frequency connection segment passes through the substrate, and the distance between it and the bottom surface of the dielectric support is E, where E≥1.5mm;

[0022] The end of the radio frequency connection segment furthest from the antenna connection segment passes sequentially through the dielectric support and the elastic electromagnetic shielding ring, with a distance d between it and the top surface of the elastic electromagnetic shielding ring.

[0023] In some possible implementations,

[0024] The tops of the multiple sets of medium supports and the top surfaces of the support structures are all on the same plane.

[0025] In some possible implementations,

[0026] The connectors installed on each set of the support structure are one or two sets.

[0027] In some possible implementations,

[0028] A positioning pin or mounting hole is provided on the top surface of the support structure.

[0029] In some possible implementations,

[0030] A crimping hole is provided on the outer surface of the substrate.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] This invention, by setting a recess on the substrate that is compatible with the radio frequency substrate, can effectively reduce the overall frame size, expand the layout space, improve the space utilization, and support the realization of ultra-low profile radio frequency interconnects.

[0033] This invention improves the matching performance during ultra-wideband high-frequency operation by setting an elastic electromagnetic coil on the support structure and fitting the elastic electromagnetic coil on the outside of the button assembly, and by using an elastic electromagnetic shielding ring to replace the traditional grounding post to improve the impact on radio frequency impedance. This can further reduce interconnection loss, effectively improve system sensitivity and EIRP, enhance electromagnetic compatibility, reduce signal interference between channels, help improve channel consistency, and thus improve system performance.

[0034] This invention greatly improves the interlocking accuracy between the radio frequency substrate and the support structure by providing mounting holes or positioning pins on the support structure;

[0035] The present invention adopts a method of pressing the frame of the substrate and fixing it at multiple points with the support structure to improve the environmental adaptability of the adapter configuration under high vibration conditions. During the whole machine test, the electrical interruption time can be controlled within the microsecond level. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0037] Figure 2 This is a schematic diagram of the connection between the support structure and the connector in this invention;

[0038] Figure 3 This is a cross-sectional view showing the connection between the support mechanism, the substrate, and the connector in this invention.

[0039] Figure 4 This is a top view of the present invention;

[0040] Figure 5 This is a side view of the present invention;

[0041] Figure 6 This is a comparison diagram of insertion loss between using a flexible electromagnetic coil and a traditional grounding post;

[0042] Figure 7 A comparison diagram showing the isolation between using an elastic electromagnetic coil and a traditional grounding post;

[0043] Among them: 1. substrate; 11. cavity; 2. support structure; 21. mounting hole; 22. positioning pin; 3. connector; 31. button assembly; 311. dielectric support; 312. button; 3121. radio frequency connection section; 3122. antenna connection section; 32. elastic electromagnetic shielding ring. Detailed Implementation

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more. For example, multiple positioning posts refer to two or more positioning posts. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] The present invention will now be described in detail.

[0046] like Figures 1-5 As shown, a converter structure for high-speed radio frequency signal transmission interconnection is used to interconnect with an antenna and a radio frequency substrate. It includes a substrate 1 with a cavity 11 that is basically adapted to radio frequency, multiple sets of support structures 2 that are vertically installed in the cavity 11, and multiple sets of connectors 3 that are respectively installed on the support structures 2 and whose bottoms pass through the substrate 1.

[0047] The connector 3 includes a snap button assembly 31 fitted inside the support structure 2 and an elastic electromagnetic shielding ring embedded in the support structure 2 and located outside the snap button assembly 31; the other end of the elastic electromagnetic shielding ring passes through the support structure 2 and is coaxially arranged with the snap button assembly 31.

[0048] The RF substrate is installed in the cavity 11 and interconnected with the RF front end of the button assembly 31. The antenna is located at the bottom of the substrate 1 and interconnected with the feed point of the button assembly 31. The elastic electromagnetic shielding ring 32 is embedded in the support structure 2 and located on the outside of the button assembly 31, so that the elastic electromagnetic shielding ring 32 is located around the connection between the button assembly 31 and the RF substrate, thereby effectively reducing the loss of ultra-wideband signals and electromagnetic signal leakage. Compared with the prior art of setting ground posts around the button assembly 31, this will greatly reduce interconnection loss, improve the matching performance during ultra-wideband high-frequency operation, and improve the sensitivity and EIRP of the entire system.

[0049] In some possible implementations, in order to enable the elastic electromagnetic shielding ring 32 to be effectively grounded;

[0050] The distance between the top surface of the elastic electromagnetic shielding ring and the top surface of the supporting structure 2 is D, where D≥0.4mm.

[0051] The top of the elastic electromagnetic shielding ring 32 is located on the outer side of the top surface of the support structure 2, with a distance greater than 0.4mm between them. That is, the top of the elastic electromagnetic shielding ring 32 will protrude, which ensures that the elastic electromagnetic shielding ring 32 can effectively contact and abut against the radio frequency substrate during subsequent assembly to achieve grounding.

[0052] In some possible implementations, in order to enable the button assembly 31 to effectively interconnect with the radio frequency substrate;

[0053] The distance between the top surface of the elastic electromagnetic shielding ring 32 and the top of the button assembly 31 is d, where d ≥ 0.1 mm.

[0054] In some possible implementations, in order to achieve interconnection with the radio frequency substrate and the antenna;

[0055] The bobby button assembly 31 is prior art; the bobby button assembly 31 includes a medium support 311 installed in the support structure 2 and coplanar with the support structure 2, and a bobby button 312 installed in the medium support 311 and coaxially arranged;

[0056] The two ends of the button 312 pass through the elastic electromagnetic shielding ring 32 and the substrate 1, respectively.

[0057] The substrate 1 has a through hole for the button 312 to pass through, thereby enabling connection with the antenna; the other end of the button 312 will pass through the elastic electromagnetic shielding ring 32 and be interconnected with the radio frequency substrate.

[0058] The elastic electromagnetic shielding ring 32 is fitted on the outside of the dielectric support 311.

[0059] In some possible implementations,

[0060] The button 312 includes a radio frequency connection section 3121, an elastic telescopic section, and an antenna connection section 3122 connected coaxially in sequence.

[0061] In order to enable the button assembly 31 to be effectively interconnected with the antenna, the end of the antenna connection section 3122 away from the radio frequency connection section 3121 passes through the substrate 1, and the distance between it and the bottom surface of the dielectric support 311 is E, where E≥1.5mm;

[0062] The end of the radio frequency connection segment 3121 away from the antenna connection segment 3122 passes through the dielectric support 311 and the elastic electromagnetic shielding ring 32 in sequence, and the distance between it and the top surface of the elastic electromagnetic shielding ring 32 is d.

[0063] In some possible implementations, in order to effectively achieve the mounting of the radio frequency substrate;

[0064] The tops of the multiple sets of medium supports 311 and the top surface of the support structure 2 are all on the same plane.

[0065] In some possible implementations, in order to effectively achieve interconnection with the antenna and the radio frequency substrate;

[0066] The connectors 3 installed on each set of support structures 2 are one or two sets.

[0067] In some possible implementations, in order to effectively achieve the fixed connection between the radio frequency substrate and the support structure 2, and the pressing of the substrate 1 frame (outer side of the substrate 1);

[0068] A positioning pin 22 or a mounting hole 21 is provided on the top surface of the support structure 2; a pressing hole is provided on the outer side surface of the substrate 1.

[0069] Example 1:

[0070] like Figure 1 , Figure 5 As shown, the external dimensions of a transition structure for high-speed radio frequency signal transmission interconnection are 91.2×83.6×5. The cavity 11 on the substrate 1 has a rectangular structure. Part of the support structure 2 is installed on the cavity 11 and connected to the four inner sides of the cavity 11. Part of the support structure 2 is arranged inside the cavity 11 structure. The arrangement of all support structures 2 corresponds to the radio frequency front-end connection point.

[0071] Among them, a set of support structure 2 is set at each of the four corners of the rectangular structure, and a set of connector 3 is set at each of the support structure 2; three sets of support structure 2 are set at equal intervals between the two sets of corners, and two sets of connector 3 are set on each of the three sets of support structure 2; then the support structure 2 is evenly arranged in the cavity 11, and two sets of connector 3 are set on each of the support structure 2 in this part.

[0072] Press-fit holes are provided on two parallel outer surfaces of the substrate 1. Mounting holes 21 on the support structure 2, which is connected to the other two sets of outer surfaces of the substrate 1, are press-fit holes and cooperate with the press-fit holes on the outer surfaces of the substrate 1 to achieve press-fit connection. The mounting holes 21 on the support structure 2 inside the cavity 11 are also connected to the RF substrate. Thus, the frame (outer surface of the substrate 1) press-fit and multi-point fixing method is adopted to improve the environmental adaptability of the adapter configuration under high vibration conditions. During the whole machine test, the electrical interruption time can be controlled within the microsecond level.

[0073] Preferably, there are four sets of positioning pins 22. It should be noted that the support structure 2 on which the positioning pins 22 are set no longer has mounting holes 21, and the two sets of pins 22 are connected to form a cross structure.

[0074] Preferably, the cross-shaped structure is distributed along the diagonal of the rectangular structure; thus ensuring that the interlocking accuracy is within 0.02mm with the central axis as the reference.

[0075] After assembly with the antenna and RF substrate, this invention satisfies the requirements of low loss and low profile while also taking into account the requirements of high reliability and high electromagnetic shielding for transmission interconnection.

[0076] Insertion loss and isolation tests were conducted on this embodiment and the scheme using traditional grounding posts, respectively. The insertion loss of this invention is approximately 0.1 dB higher than that of traditional grounding posts over a wide bandwidth, and the isolation is approximately 5 dB higher than that of traditional grounding posts over a wide bandwidth, ensuring the quality of the signal transmitted by the 312 button.

[0077] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A switching structure for high-speed radio frequency signal transmission interconnection, used for interconnection with an antenna and a radio frequency substrate, characterized in that, It includes a substrate with a recessed cavity that is basically compatible with radio frequency, multiple sets of support structures vertically installed in the recessed cavity, and multiple sets of connectors respectively installed on the support structures and with their bottoms passing through the substrate. The connector includes a snap-fit ​​assembly fitted within a support structure and an elastic electromagnetic shielding ring embedded in the support structure and located outside the snap-fit ​​assembly; the other end of the elastic electromagnetic shielding ring passes through the support structure and is coaxially arranged with the snap-fit ​​assembly; the distance between the top surface of the elastic electromagnetic shielding ring and the top surface of the support structure is D, where D≥0.4mm.

2. The adapter structure for high-speed radio frequency signal transmission interconnection according to claim 1, characterized in that, The distance between the top surface of the elastic electromagnetic shielding ring and the top of the button assembly is d, where d ≥ 0.1 mm.

3. The adapter structure for high-speed radio frequency signal transmission interconnection according to claim 1, characterized in that, The bobby button assembly includes a medium support body installed within and coplanar with the support structure, and a bobby button installed within and coaxially arranged within the medium support body. The two ends of the button pass through the elastic electromagnetic shielding ring and the substrate, respectively.

4. The adapter structure for high-speed radio frequency signal transmission interconnection according to claim 3, characterized in that, The bobby button includes a radio frequency connection segment, an elastic telescopic segment, and an antenna connection segment connected coaxially in sequence. The end of the antenna connection segment away from the radio frequency connection segment passes through the substrate, and the distance between it and the bottom surface of the dielectric support is E, where E≥1.5mm; The end of the radio frequency connection segment furthest from the antenna connection segment passes sequentially through the dielectric support and the elastic electromagnetic shielding ring, with a distance d between it and the top surface of the elastic electromagnetic shielding ring.

5. The adapter structure for high-speed radio frequency signal transmission interconnection according to claim 3, characterized in that, The tops of the multiple sets of medium supports and the top surfaces of the support structures are all on the same plane.

6. A switching structure for high-speed radio frequency signal transmission interconnection according to any one of claims 1-5, characterized in that, The connectors installed on each set of the support structure are one or two sets.

7. The adapter structure for high-speed radio frequency signal transmission interconnection according to claim 6, characterized in that, A positioning pin or mounting hole is provided on the top surface of the support structure.

8. The adapter structure for high-speed radio frequency signal transmission interconnection according to claim 7, characterized in that, A crimping hole is provided on the outer surface of the substrate.

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