How to design a miniaturized system to integrate passive and active components on a “filter carrier”?

As technology advances, the telecom industry is keening on smaller, lighter communication systems,today we’d like to introduce how to take cavity filter as a module carrier to design a miniaturized system to integrate passive and active components,and what’s its advantages.

1. Design flow of traditional system:

A system consists of multiple passive and active components,our traditional design thought is as below:
1) Clarifying customer’s requirements;
2) System engineers design and analyze circuits according to customer’s requirements;
3) Identify system circuits and internal components’ technical parameters;
4) Purchase the required components and chassis;
5) Verification of assembly and testing.

2. Design thought of miniaturized system(recommend):

1) Clarifying customer’s requirements;
2) System engineers design and analyze circuits through customer’s requirements;
3) Identify system circuits and internal components’ technical parameters;
4) System engineer and structural engineer design and confirm the outline.(system chassis,internal components).
5) Regard the filter/duplexer as a carrier,to design the system structure.

As the figure shows below:
integrated components

Part A The filter function of the whole filter module.

Part B The Installation position of active devices on the filter module ,such as PA,PCB board,ect.
filter 3D drawing

Part C The heat sinks with heat dissipation function for the whole filter module,
which is on the back of Part B.
3.The advantages of “take filter as a carrier” in system design:

1) Compared with the general design, the system design with the filter as the carrier, the size can be designed smaller to meet customers’ demands for miniaturization.
2) The general design wastes the internal space,and also just accumulates heat inside.Conversely,this new design optimizes the waste from internal to external,removal of excess heat is accomplished by heat sinks, to achieve higher power requirements of the system.
3) The whole filter module can realize the electrical performance demands,in addition,it is a part of the chassis itself , the module integration is pretty high.

As the designer of RF filter, Jingxin has high passion of continuous research & development to contribute to RF solution, especially supporting the clients to create more value with the design and RF components. So if you’re interested in such a system design, or need any demand of design on RF & microwave passive components, you are welcome to contact with us.


Post time: Sep-07-2021