CN114297978A - Four-channel front-end self-checking integrated circuit design method - Google Patents
Four-channel front-end self-checking integrated circuit design method Download PDFInfo
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- CN114297978A CN114297978A CN202111556412.XA CN202111556412A CN114297978A CN 114297978 A CN114297978 A CN 114297978A CN 202111556412 A CN202111556412 A CN 202111556412A CN 114297978 A CN114297978 A CN 114297978A
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Abstract
The invention discloses a design method of a four-channel front-end self-checking integrated circuit, which compresses a front-end circuit and a self-checking power dividing circuit into one circuit, wherein the working frequency band covers DC-2 GHz, microwave circuits are designed on the front and back sides of the circuit, microwave packaging devices are welded on the two sides of the circuit through SMT, the microwave circuits are designed on the front side, the self-checking power dividing circuit is designed on the back side, microwave cables between a self-checking power dividing circuit box body and the front-end channel are reduced, the assembly steps of the system are simplified, the assembly speed of the whole module is accelerated, and the size of the whole circuit is 55.6 multiplied by 10 multiplied by 1mm3The cost of the whole system is reduced, and the occupied area of the whole system is effectively reduced.
Description
Technical Field
The invention belongs to the microwave communication technology, and particularly relates to a design method of a four-channel front-end self-checking integrated circuit.
Background
In recent years, military and aerospace electronic equipment are developed to be light, thin and short, and the requirements for high density, high function and high speed of circuit components are more and more urgent. The four-channel front-end self-checking integrated circuit is used as a part of the front end of some investigation equipment, and the integrated design method of the four-channel front-end self-checking integrated circuit has important significance.
At present, for a detection system, a plurality of channels are integrated into one circuit, a microwave channel circuit is designed on the front side, a self-detection power dividing circuit is designed on the back side, and interconnection of a self-detection source signal and a microwave signal is realized by using a via hole on a printed board under the condition of not reducing the performance based on HFSS simulation. The design method of the four-channel front-end self-checking integrated circuit and the circuit design of other functions are in the same box body. The front-end channel box body is connected with the self-checking signal power distribution network box body through 4 microwave cables. Because the front-end channel and the power distribution network are respectively designed by adopting the two box bodies, the occupied area of the whole system is larger, and the two box bodies are connected by adopting a cable, so that an independent microwave cable needs to be manufactured, and the assembly time and the assembly cost of the whole system can be increased.
The self-checking power distribution circuit and the front-end channel are designed under the condition that the box body is on the same side, on one hand, the whole area of the module can be increased, and on the other hand, the self-checking signal and the microwave link are crossed. In order to avoid the crossing of the self-checking signal and the microwave link, a multilayer board technology is used, so that the cost of the circuit is increased, the error probability of the circuit is increased, and the reliability of the design is improved.
Disclosure of Invention
The invention aims to provide a design method of a four-channel front-end self-checking integrated circuit, which compresses a front-end circuit and a self-checking power dividing circuit into one circuit, reduces microwave cables between a self-checking power dividing circuit box body and a front-end channel, simplifies the assembly steps of a system, accelerates the assembly speed of the whole module, and ensures that the size of the whole circuit is 55.6 multiplied by 10 multiplied by 1mm3The cost of the whole system is reduced, and the occupied area of the whole system is effectively reduced.
The technical solution for realizing the invention is as follows: a design method of a four-channel front-end self-checking integrated circuit is characterized in that: the working frequency range covers DC-2 GHz, microwave circuits are designed on the front and back sides of the circuit, microwave packaging devices are welded on the two sides of the circuit through SMT, the microwave circuits are designed on the front side, and self-checking power dividing circuits are designed on the back side.
Further, based on HFSS simulation, under the condition that performance is not reduced, interconnection of self-checking source signals and microwave signals is achieved through via holes in a printed board, 4 paths of microwave paths and 4 paths of self-checking paths are designed on the front side, a self-checking power dividing circuit is designed on the back side, and the self-checking signals are divided into four paths through a back side circuit and transmitted to the front side circuit through the via holes.
Furthermore, the printed board is designed into a four-layer board, copper is laid in the middle layer of the printed board, the edge is metalized, and the microwave grounding area is increased; meanwhile, according to the arrangement of the devices, the front face of the printed board is placed on the hollowed structural part, and the circuit board is additionally provided with metalized through holes, so that the grounding between each layer of circuits is good; and the grounding area is increased by the contact of the metalized through hole and the structural part.
Furthermore, the front side of the circuit board is placed on a hollowed structural member, the screws are installed from the back side, so that the circuit is fastened on the structural member, the side wall of the circuit is tightly attached to the structural member, the grounding of the circuit is increased, and the back side microwave signal is prevented from interfering with the front side circuit; the back circuit is isolated from the digital circuit by a metal partition wall, so that the crosstalk of the outside to the microwave circuit is reduced; meanwhile, metal partition walls are arranged among the four channels on the front side, mutual crosstalk among the channels is prevented, certain spaces are reserved among the channels, the width of each metal partition wall is increased, and metal through holes are formed in the corresponding positions of the metal partition walls, so that a front circuit is well grounded.
Furthermore, the self-checking signal enters the self-checking power dividing circuit for power division, and the self-checking signal after power division is connected back to the front circuit in series through the through hole and is supplied to each front circuit for use.
Compared with the prior art, the invention has the remarkable advantages that:
(1) the microwave circuit is designed on the front side and the back side of the circuit, the area of the printed board is effectively utilized, and the integration is greatly increased.
(2) The invention integrates the self-checking power distribution module and the front-end module, reduces the cables interconnected among the modules, reduces the module volume required by realizing the function and reduces the production cost of the assembly.
(3) The circuit is assembled by adopting SMT surface mounted devices, and then is fixed on the structural member by using screws, so that the assembly difficulty is reduced, the assembly time of the assembly is shortened, and the production cost of the assembly is reduced.
(4) The self-checking signal in the assembly is subjected to front-back interconnection, so that the assembly difficulty is effectively reduced, and the reliability of signal interconnection is improved.
Drawings
FIG. 1 is a diagram of a four-channel front-end self-test IC.
Fig. 2 is a schematic diagram of a self-checking power division.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly specified or limited, the terms "connected," "secured," and the like are to be construed broadly, e.g., "secured" may be fixedly connected, releasably connected, or integral; "connected" may be mechanically or electrically connected. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the scope of the claimed invention.
The following further introduces specific embodiments, technical difficulties and inventions of the present invention with reference to the design examples.
The invention mainly aims at the design method of the four-channel front-end self-checking integrated circuit of the ground electronic investigation equipment, and through designing the microwave circuit on two sides, integrating the multi-channel front-end circuit on the front side and designing the self-checking circuit on the back side, the electronic investigation volume of the microwave subsystem is effectively reduced, the integration of the system is realized, and compared with the component assembly integration mode, the volume and the weight have obvious advantages, and the actual engineering requirements are met. The following detailed description of the embodiments of the invention is provided in connection with the accompanying drawings.
With reference to fig. 1, the design method of the four-channel front-end self-checking integrated circuit requires that the working frequency band of the circuit covers DC-2 GHz, microwave circuits are designed on both the front and back sides of the circuit, microwave packaging devices are welded on both sides of the circuit through SMT, a multi-channel front-end circuit is designed on the front side, and a self-checking power dividing circuit is designed on the back side, so that the integration level is improved, and the volume of the circuit is reduced.
Based on HFSS simulation, under the condition of not reducing the performance, the interconnection of a self-checking source signal and a front end signal is realized by using a via hole on a printed board, 4 paths of front end paths and 4 paths of self-checking paths are designed on the front side, a self-checking power dividing circuit is designed on the back side, and the self-checking signal is divided into four paths by the back side circuit and is transmitted to the front side circuit through the via hole.
The printed board is designed into a four-layer board, copper is laid in the middle layer of the printed board, the edge is covered in a metallization mode, and the microwave grounding area is increased; meanwhile, according to the arrangement of the devices, the front face of the printed board is placed on the hollowed structural part, and the circuit board is additionally provided with metalized through holes, so that the grounding between each layer of circuits is good; and the grounding area is increased by the contact of the metalized through hole and the structural part.
The front side of the circuit board is placed on the hollowed structural member, the screws are installed from the back side, so that the circuit is fastened on the structural member, the side wall of the circuit is tightly attached to the structural member, the grounding of the circuit is increased, and the back side microwave signal is prevented from interfering with the front side circuit; the back circuit is isolated from the digital circuit by a metal partition wall, so that the crosstalk of the outside to the microwave circuit is reduced; meanwhile, metal partition walls are arranged among the four channels on the front side, mutual crosstalk among the channels is prevented, certain spaces are reserved among the channels, the width of each metal partition wall is increased, and metal through holes are formed in the corresponding positions of the metal partition walls, so that a front circuit is well grounded.
And the self-checking signal enters the self-checking power dividing circuit for power division, and the self-checking signal after power division is connected back to the front circuit in series through the through hole and is supplied to each front circuit for use. Compare in traditional circuit, multichannel front end circuit self-checking needs a plurality of solitary self-checking modules, saves a merit and divides four ways subassembly and the cable that is connected with solitary self-checking module, effectively reduces the area that front circuit occupied. The whole circuit effectively reduces the whole system area under the condition of realizing the same functionThe volume occupied. The size of the four-channel front-end self-test integrated circuit is 55.6 multiplied by 10 multiplied by 1mm3。
The circuit with two functions is integrated into a printed board, so that the assembly steps are simplified, and the production cost and the processing period are greatly shortened.
Example 1
Fig. 1 is a circuit structure diagram of a four-channel front-end self-test integrated circuit design method according to an embodiment of the present invention, where the circuit includes 4 front-end circuits and 1 self-test power divider circuit.
With reference to fig. 1, two sides of the circuit are welded with microwave packaged devices through SMT, a multi-channel front-end circuit is designed on the front side, a self-checking power divider circuit is designed on the reverse side, and the two sides are interconnected through vias, so that compared with the case of using cables or insulators, the assembly process is simplified, the assembly time is shortened, and meanwhile, certain cost is saved; the circuit increases the grounding surfaces of the printed board and the box body by means of copper paving in the middle layer of the printed board, metallization edge covering and via hole increasing, and the performance of the circuit is improved; partition walls are added between each front-end circuit, so that the isolation between channels is improved; while the whole circuit size is 55.6X 10X 1mm3Compared with the traditional design method, the volume is reduced by more than 50%.
Claims (6)
1. A design method of a four-channel front-end self-checking integrated circuit is characterized in that: the working frequency range covers DC-2 GHz, microwave circuits are designed on the front and back sides of the circuit, microwave packaging devices are welded on the two sides of the circuit through SMT, the microwave circuits are designed on the front side, and self-checking power dividing circuits are designed on the back side.
2. The design method of the four-channel front-end self-test integrated circuit according to claim 1, characterized in that: based on HFSS simulation, under the condition of not reducing the performance, the interconnection of a self-checking source signal and a microwave signal is realized by using a via hole on a printed board, 4 paths of microwave paths and 4 paths of self-checking paths are designed on the front side, a self-checking power dividing circuit is designed on the back side, and the self-checking signal is divided into four paths by the back side circuit and is transmitted to the front side circuit through the via hole.
3. The design method of the four-channel front-end self-test integrated circuit of claim 2, wherein: the printed board is designed into a four-layer board, copper is laid in the middle layer of the printed board, the edge is covered in a metallization mode, and the microwave grounding area is increased; meanwhile, according to the arrangement of the devices, the front face of the printed board is placed on the hollowed structural part, and the circuit board is additionally provided with metalized through holes, so that the grounding between each layer of circuits is good; and the grounding area is increased by the contact of the metalized through hole and the structural part.
4. The design method of the four-channel front-end self-test integrated circuit according to claim 3, characterized in that: the front side of the circuit board is placed on the hollowed structural member, the screws are installed from the back side, so that the circuit is fastened on the structural member, the side wall of the circuit is tightly attached to the structural member, the grounding of the circuit is increased, and the back side microwave signal is prevented from interfering with the front side circuit; the back circuit is isolated from the digital circuit by a metal partition wall, so that the crosstalk of the outside to the microwave circuit is reduced; meanwhile, metal partition walls are arranged among the four channels on the front side, mutual crosstalk among the channels is prevented, certain spaces are reserved among the channels, the width of each metal partition wall is increased, and metal through holes are formed in the corresponding positions of the metal partition walls, so that a front circuit is well grounded.
5. The design method of the four-channel front-end self-test integrated circuit according to claim 4, wherein: and the self-checking signal enters the self-checking power dividing circuit for power division, and the self-checking signal after power division is connected back to the front circuit in series through the through hole and is supplied to each front circuit for use.
6. The design method of the four-channel front-end self-test integrated circuit according to any one of claims 1 to 5, characterized in that: the whole circuit size is 55.6 multiplied by 10 multiplied by 1mm3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111556412.XA CN114297978A (en) | 2021-12-17 | 2021-12-17 | Four-channel front-end self-checking integrated circuit design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111556412.XA CN114297978A (en) | 2021-12-17 | 2021-12-17 | Four-channel front-end self-checking integrated circuit design method |
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| Publication Number | Publication Date |
|---|---|
| CN114297978A true CN114297978A (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111556412.XA Pending CN114297978A (en) | 2021-12-17 | 2021-12-17 | Four-channel front-end self-checking integrated circuit design method |
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| CN (1) | CN114297978A (en) |
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- 2021-12-17 CN CN202111556412.XA patent/CN114297978A/en active Pending
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