Shielding structure of ADRV9009-X2 dual-channel RF transceiver
By designing the spaced distribution of runway antenna channels and corresponding isolation cavity shielding cover structures in the ADRV9009-X2 dual-channel RF transceiver, the problem of insufficient channel isolation in the prior art is solved, and higher signal isolation is achieved and lower power consumption.
Patent Information
- Application Number
- CN202420218700.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-01-30
AI Technical Summary
The existing ADRV9009-X2 dual-channel RF transceivers lack effective shielding structure, resulting in insufficient interference and isolation of connected channels, causing system self-excitation, reducing network call quality, and possibly causing power amplifier burning.
A shielding structure of an ADRV9009-X2 dual-channel RF transceiver including a base plate, a PCB board and a shielding cover is designed. A number of TX, RX and ORX antenna channels are distributed at intervals on the PCB board, and isolation cavity corresponding to these channels is provided on the shield cover. The shield cover is fixedly connected to the bottom plate by fastening bolts to achieve spatial isolation of each cavity.
Through this design, the isolation between channels is significantly improved, signal leakage and interference is reduced, system self-excitation is avoided, network call quality is improved, and system power consumption and cost are reduced.
Smart Images
Figure CN222441695U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of communications, and in particular to a shielding structure of an ADRV9009-X2 dual-channel RF transceiver. Background Art
[0002] 1. The existing ADRV9009-X2 has no shielding cover or the shielding cover structure is imperfect, resulting in interference between connected channels and insufficient isolation between them.
[0003] 2. Insufficient isolation of multi-channel transceivers will cause self-excitation of the system, resulting in a decrease in network call quality, and in severe cases, the power amplifier will burn out. Traditional transceivers need to increase the isolation of the system by increasing the interface distance, which occupies a large area and is often limited by the size and cost of the PCB board.
[0004] 3. In addition, the circuit architecture of traditional multi-channel transceivers is built with discrete RF and digital devices, which has high power consumption, high cost and difficulty in debugging. Utility Model Content
[0005] In order to solve the above technical problems, the utility model provides a shielding structure of an ADRV9009-X2 dual-channel RF transceiver.
[0006] The utility model adopts the following technical scheme: a shielding structure of an ADRV9009-X2 dual-channel RF transceiver, comprising a base plate, a PCB board and a shielding cover, the PCB board is arranged on the base plate, a plurality of TX antenna channels, a plurality of RX antenna channels, and a plurality of ORX antenna channels are arranged at intervals on the PCB board, isolation cavities are respectively arranged on the shielding cover relative to the plurality of TX antenna channels, the plurality of RX antenna channels, and the plurality of ORX antenna channels, the shielding cover is arranged on the PCB board, and the isolation cavities on the shielding cover respectively correspond to and cover the above-mentioned different types of antenna channels.
[0007] Further preferably, the shielding cover is fixedly connected to the base plate via a fixing device, and the fixing device is a fastening bolt.
[0008] Further preferably, the shielding cover is provided with a plurality of circular holes, which respectively correspond to antenna interfaces of a plurality of TX antenna channels, a plurality of RX antenna channels, and a plurality of ORX antenna channels.
[0009] Further preferably, the area of the shielding cover is 1 / 3-1 / 2 of the area of the PCB board. Other functional components of the PCB board are not covered by the shielding cover, thereby achieving a good shielding effect while ensuring a heat dissipation effect.
[0010] Further preferably, the bottom plate is provided with a plurality of mounting grooves for accommodating antenna interfaces of different types of antenna channels on the PCB board.
[0011] Further preferably, the multiple TX antenna channels, multiple RX antenna channels, and multiple ORX antenna channels on the PCB board are all runway-type structures, and the spacing between the multiple TX antenna channels, multiple RX antenna channels, and multiple ORX antenna channels is 1 / 5-1 / 3 of the maximum width of the runway-type structure. The runway-type structure setting can arrange more antenna channels in a relatively small space, greatly reducing the size of the finished product; the reasonable spacing setting can achieve a good shielding effect.
[0012] Different from the prior art, the above technical solution has the following beneficial effects:
[0013] (1) The utility model arranges various types of antenna channels on the PCB board at intervals and designs them into a runway-shaped structure to save space.
[0014] (2) The utility model designs a shielding cover, wherein isolation cavities corresponding to various types of antenna channels are arranged inside the shielding cover. When the shielding cover is placed on the PCB board, the cavity structure is completely matched. Finally, the PCB board, the shielding cover, and the bottom plate are tightly connected and reliably grounded by screws, thereby realizing spatial isolation of each cavity. Ultimately, the signal leakage of the antenna channels is reduced and mutual interference is prevented. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 Schematic diagram of the shielding structure of the ADRV9009-X2 dual-channel RF transceiver of this embodiment.
[0016] Figure 2 for Figure 1 BB cross-sectional view.
[0017] Figure 3 Schematic diagram of the shielding structure of the ADRV9009-X2 dual-channel RF transceiver in this embodiment.
[0018] Figure 4 FIG. 4 is a front view of the shielding cover of the shielding structure of this embodiment.
[0019] Figure 5 FIG. 1 is a first stereoscopic view of the shielding cover of the shielding structure of this embodiment.
[0020] Figure 6 FIG. 4 is a second stereoscopic view of the shielding cover of the shielding structure of this embodiment.
[0021] Figure numerals: 1. Shielding cover; 11. Isolation cavity; 12. Round hole; 2. PCB board; 21. Antenna channel; 22. Antenna interface; 3. Bottom plate; 31. Mounting slot; 4. Fastening screws. DETAILED DESCRIPTION
[0022] In order to explain the technical content, structural features, achieved objectives and effects of the technical solution in detail, the following is a detailed description in conjunction with specific embodiments and accompanying drawings.
[0023] The ADRV9009 is a dual-channel RF transmitter and receiver with an observation receiver. The operating frequency range is 75MHZ to 6GHz. The device supports up to 450MHZ of synthesis bandwidth on its transmitter. The receiver section of the device can operate as either a dual-channel receiver supporting up to 200MHz bandwidth or a single-channel observation receiver supporting up to 450MH bandwidth. The receiver section switches between single-channel and dual-channel modes in time division duplex (TDD) operation, using the dual-channel receiver mode during the receiver time yard and the single-channel observation receiver during the transceiver time slot. The single-channel observation receiver can select one of the ORX1 IN+ / ORX1 IN- or ORX2 IN+ / ORX2 IN-RF inputs. Data transmission is accomplished through eight JESD204B dedicated high-speed interface channels. There are four interface channels, each for transmitting transmitter data and main receiver / observation receiver data.
[0024] refer to Figure 1-Figure 6 As shown, a shielding structure of an ADRV9009-X2 dual-channel RF transceiver of this embodiment includes a base plate 3, a PCB board 2 and a shielding cover 1. The PCB board 2 is arranged on the base plate 3. The base plate 3 is provided with a plurality of mounting grooves 31 for accommodating antenna interfaces 22 of different types of antenna channels 21 on the PCB board 2.
[0025] The PCB board is provided with a plurality of antenna channels 21 spaced apart from each other, including a plurality of TX antenna channels, a plurality of RX antenna channels, and a plurality of ORX antenna channels. Specifically, refer to Figure 4 As shown, the antenna channel includes 12 channels, namely Tx1-Tx4, Rx1-RX4, and ORX1-ORX4. There are 12 channels in total, and the above channels are designed as a structure with intervals from each other in the PCB board diagram. The multiple TX antenna channels, multiple RX antenna channels, and multiple ORX antenna channels on the PCB board are all runway-type structures. Some runway-type structures also form a transition structure to avoid installation holes. And the spacing between multiple TX antenna channels, multiple RX antenna channels, and multiple ORX antenna channels is 1 / 5-1 / 3 of the maximum width of the runway-type structure. The runway-type structure setting can arrange more antenna channels 21 in a relatively small space, greatly reducing the size of the finished product; the reasonable spacing setting can achieve a good shielding effect.
[0026] The above-mentioned 12 channels are designed to correspond one-to-one with the PCB board 2 through the shielding cover 1. The shielding cover 1 is respectively provided with isolation cavities 11 corresponding to the above-mentioned multiple TX antenna channels, multiple RX antenna channels, and multiple ORX antenna channels. An isolation cavity 11 is respectively provided for each different type of antenna channel. The shielding cover 1 is covered on the PCB board and the isolation cavities 11 respectively cover the above-mentioned different types of antenna channels 21.
[0027] In this embodiment, the shielding cover 1 is fixedly connected to the bottom plate by fastening bolts, and in other embodiments, it can also be fixedly connected by snap-fitting.
[0028] In this embodiment, a plurality of circular holes 12 are formed on the shielding cover, respectively corresponding to antenna interfaces 22 of a plurality of TX antenna channels, a plurality of RX antenna channels, and a plurality of ORX antenna channels.
[0029] In this embodiment, the area of the shielding cover 1 is 1 / 3-1 / 2 of the area of the PCB board 2. Other functional components of the PCB board 2 are not covered by the shielding cover 1, so as to achieve a good shielding effect while ensuring the heat dissipation effect. In this embodiment, the isolation cavity of the shielding cover 1 is an aluminum cavity. The entire shielding cover 1 is also integrally formed of aluminum material.
[0030] In order to verify the effect of this embodiment, the isolation of the two receiving channels is experimentally tested as follows:
[0031] 1. Isolation between two receiving channels
[0032]
[0033] From the table above, we can see that in general, the farther the channels are from each other, the better the isolation. RX1 and RX2 are adjacent, and the isolation when the cover is opened is: 62.8-25.9=36.9DB. Rx1 and Rx3 are farther away, and the isolation is: 62.8-7.3=55.5DB, and the isolation is increased; the greater the isolation, the better the effect.
[0034] After the cover is closed, the isolation between RX1 and RX2 is: 63.1-8.4=54.7DB, which is 27.8DB less than 36.9DB with the cover open. The isolation between Rx1 and Rx3 is: 63.1+15.2=78.3, which is 21.8DB less than 55.5DB with the cover open.
[0035] It can be seen that the newly designed shielding structure has played a great role. The embodiment of the utility model saves space by arranging various types of antenna channels on the PCB board at intervals and designing them into a runway-type structure. The utility model designs a shielding cover 1, and the shielding cover 1 is provided with an isolation cavity 11 corresponding to various types of antenna channels one by one. When the shielding cover 1 is placed on the PCB board, the cavity structure is completely matched. Finally, the PCB board 2, the shielding cover 1, and the bottom plate 3 are tightly connected and reliably grounded by screws to achieve spatial isolation of each cavity; ultimately, the signal leakage of the antenna channels is reduced and no interference is achieved.
[0036] A new shielding and isolation structure of this embodiment can achieve isolation between uplink and downlink, and isolation between antenna systems. The uplink and downlink are separated by a metal cavity to ensure the integrity of the signal and no mutual interference. The antenna is also kept in the metal hole to ensure the integrity of the signal and no mutual interference. The shielding structure of the utility model has the following advantages:
[0037] 1. The aluminum cavity shielding structure is adopted to improve the isolation of the system and reduce interference;
[0038] 2. The aluminum cavity shielding structure is adopted to improve the system gain and increase the output power, which can reduce the transmission power and the system power consumption accordingly;
[0039] 3. Due to the use of aluminum cavity shielding structure, the size of multiple channels is reduced, the size of the board is reduced, and the cost is saved.
[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "include..." or "comprise..." do not exclude the existence of other elements in the process, method, article or terminal device including the elements. In addition, in this article, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself.
[0041] Those skilled in the art should understand that the above embodiments can be provided as methods, devices, or computer program products. These embodiments can be in the form of complete hardware embodiments, complete software embodiments, or embodiments combining software and hardware. All or part of the steps in the methods involved in the above embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a storage medium readable by a computer device for executing all or part of the steps described in the above embodiments. The computer device includes, but is not limited to: personal computers, servers, general-purpose computers, special-purpose computers, network devices, embedded devices, programmable devices, smart mobile terminals, smart home devices, wearable smart devices, in-vehicle smart devices, etc.; the storage medium includes, but is not limited to: RAM, ROM, disk, tape, CD, flash memory, U disk, mobile hard disk, memory card, memory stick, network server storage, network cloud storage, etc.
[0042] The above embodiments are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a computer device to generate a machine, so that the instructions executed by the processor of the computer device generate instructions for implementing the process in the flowchart. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.
[0043] These computer program instructions may also be stored in a computer device readable memory capable of directing a computer device to operate in a specific manner, so that the instructions stored in the computer device readable memory produce a manufactured product including an instruction device, the instruction device implementing the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.
[0044] These computer program instructions can also be loaded onto a computer device so that a series of operating steps are executed on the computer device to produce a computer-implemented process, whereby the instructions executed on the computer device provide for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.
[0045] Although the above embodiments have been described, once the technical personnel in the field know the basic creative concept, they can make other changes and modifications to these embodiments. Therefore, the above description is only the embodiment of the utility model, and it does not limit the patent protection scope of the utility model. Any equivalent structure or equivalent process transformation made by using the contents of the utility model specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the utility model.
Claims
1. A shielding structure of an ADRV9009-X2 dual-channel RF transceiver, characterized in that: The invention comprises a bottom plate, a PCB board and a shielding cover, wherein the PCB board is arranged on the bottom plate, a plurality of TX antenna channels, a plurality of RX antenna channels and a plurality of ORX antenna channels are arranged at intervals on the PCB board, the shielding cover is provided with isolation cavities respectively corresponding to the plurality of TX antenna channels, the plurality of RX antenna channels and the plurality of ORX antenna channels, the shielding cover is arranged on the PCB board, and the isolation cavities on the shielding cover respectively correspond to and cover antenna channels of different types.
2. The shielding structure of the ADRV9009-X2 dual-channel RF transceiver according to claim 1, characterized in that: The shielding cover is fixedly connected to the bottom plate via a fixing device.
3. The shielding structure of the ADRV9009-X2 dual-channel RF transceiver according to claim 1, characterized in that: The shielding cover is provided with a plurality of circular holes, which respectively correspond to antenna interfaces of a plurality of TX antenna channels, a plurality of RX antenna channels, and a plurality of ORX antenna channels.
4. The shielding structure of the ADRV9009-X2 dual-channel RF transceiver according to claim 1, characterized in that: The area of the shielding cover is 1 / 3-1 / 2 of the area of the PCB board.
5. The shielding structure of the ADRV9009-X2 dual-channel RF transceiver according to claim 1, characterized in that: The bottom plate is provided with a plurality of mounting grooves for accommodating antenna interfaces of different types of antenna channels on the PCB.
6. The shielding structure of the ADRV9009-X2 dual-channel RF transceiver according to claim 1, characterized in that: The multiple TX antenna channels, multiple RX antenna channels, and multiple ORX antenna channels on the PCB board are all runway-type structures, and the spacing distance between the multiple TX antenna channels, multiple RX antenna channels, and multiple ORX antenna channels is 1 / 5-1 / 3 of the maximum width of the runway-type structure.
7. The shielding structure of the ADRV9009-X2 dual-channel RF transceiver according to claim 1, characterized in that: The shielding cover is an aluminum shielding cover, and the isolation cavity is an aluminum cavity.