Summarize the practical skills of PCB high frequency board design

76 Published by FASTPCBA 11月 08,2018

Summarize the practical skills of PCB high frequency board design

The PCB high frequency board is designed to be smaller, faster and cheaper.As the interconnection point is the weakest link in the circuit chain, in RF design, the electromagnetic property of the interconnection point is the main problem faced by engineering design. It is necessary to investigate each interconnection point and solve the existing problems.

The interconnection of the circuit board system includes three types of interconnection, namely chip to circuit board, interconnection within PCB board and signal input/output between PCB and external device.This paper mainly introduces the practical skills of high frequency PCB design for interconnection in PCB board, and I believe this paper will bring convenience to future PCB design.

The interconnection between chip and PCB in PCB design is important for design. However, the main problem of interconnection between chip and PCB is that too high interconnection density will lead to the basic structure of PCB material becoming the factor limiting the growth of interconnection density.This article shares practical tips for PCB high frequency board design.

high frequency board

For high frequency applications, PCB interconnection for high frequency PCB design techniques are:

1, the transmission line to the corner a 45 ° Angle, in order to reduce return loss;

2. High performance insulation board with strict control of insulation constant values should be adopted.This method can effectively manage the electromagnetic field between the insulation material and the adjacent wiring.

3. Perfect PCB design specifications for high-precision etching.Consider setting the total line width error to +/-0.0007 inches, managing undercuts and cross-sections of wiring shapes, and specifying lining plating conditions.The overall management of the wiring geometry and coating surface is very important for solving the skin effect problems related to microwave frequency and realizing these specifications.

4. There is tap inductance for protruding leads, and the components with leads should be avoided.In high frequency environments, it is best to use surface mount components.

5. For the signal via hole, it is necessary to avoid using the process of via hole processing (PTH) on the sensitive plate.Because this process will lead to lead inductance through the hole.A lead inductance can affect 4 to 19 layers if a through hole on a 20 – layer plate is used to connect 1 to 3 layers.

6. It should provide abundant ground.These joints shall be connected by moulded holes to prevent the influence of three-dimensional electromagnetic field on the circuit board.

FASTPCBA manufacturer in china custom made circuit board

FASTPCBA Technology Co.,Ltd Quality derives from profession, reputation wins the future. FASTPCBA...

Do you like ? 142

Read more

How to distinguish whether PCB factory is reliable?

How to distinguish whether PCB factory is reliable? We usually call SMT patch processing OEM proc...

Do you like ? 125

Read more

How much do you know about PCBA one-stop service?

What is PCBA one-stop service? Now more and more customers want to do one-stop PCBA service, send...

Do you like ? 105

Read more

Development status of PCB in automotive electronics

Automotive electronics is the combination of electronic information technology and traditional au...

Do you like ? 124

Read more

Printed circuit board packing of BGA

Printed circuit board packing of BGA 1. There are three advantages for IC adopting BGA packaging:...

Do you like ? 79

Read more

What is a pcba one-stop service?

What is a pcba one-stop service PCBA one-stop service is a broad concept. In the PCBA processing ...

Do you like ? 142

Read more

Customer’s requirement for SMT patch processing supplier

In general, customers who need to develop or process the project will review the “quality a...

Do you like ? 304

Read more

In 2018, technology will change those areas

The year 2017 has passed, and many exciting technological advances have emerged in the year, as w...

Do you like ? 183

Read more