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High-Frequency PCB

Whether rigid or flexible, the high-frequency printed circuit board provides quicker signal flow rates and then a frequency range of up to 100 GHz. It’s significant to note that a variety of materials are created to function at high-frequency regions. Low levels of thermal expansion, a reduced dissipation factor, and a lower dielectric constant (Dk) are characteristics of HF PCBs. They are frequently utilized in HDI technology.

Materials used for HF circuit boards

To attain the high frequency offered by this type of PCB, special materials are needed. Your design can be supported by a number of substrate materials, which may vary depending on the signal rates needed and the implementation of the circuit board. High-frequency boards have unique requirements for the material used, such as for wireless applications & data rates there in the upper GHz range:

  • Adapted permittivity
  • Low attenuation, for efficient signal transmission
  • Low tolerances for insulation thickness & dielectric constant in homogeneous construction.

Any variations in the Er values of these materials can have an impact on the board’s impedance, which is why special materials are needed to accomplish the high frequency offered by this kind of printed circuit board.

Applications for HF PCBs

Many goods and sectors use high-frequency both rigid and flexible PCBs, including:

  • Cell phone
  • Telecommunications
  • Military and aerospace
  • RF microwave
  • Automotive (mainly LIDAR, mini radar that communicates a vehicle’s surroundings)
  • High-density interconnect 
  • High-speed design applications

For its decreased dielectric loss, less signal loss, lower price of circuit fabrication, and improved fit for fast-turnaround prototype applications, Rogers dielectric material is a popular choice among PCB designers.

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