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marketing@gespcb.com15+Years Devoted to PCB Solutions & Manufacturing
High-frequency electronic equipment is the current development trend, especially today when wireless networks are popular. Satellite communications are developing rapidly, and information products are moving toward high speed and high frequency.
Therefore, based on satellite systems and cellular base stations, the development of electronic products requires the integration of special signal requirements into electronic components and products, which requires the use of high-frequency circuit boards.
HF PCB offers a frequency range of 500MHz-2GHz, making it ideal for high-speed designs as well as radio frequency (RF), microwave, and mobile applications. These higher transmission frequencies can also provide faster signal flow rates, which are required for today’s increasingly complex electronic switches and other components.
High-frequency boards for wireless applications and data rates in the upper GHz range place special demands on the material used:
In general, radio frequency can be defined as a frequency above 1 GHz. PTFE material is currently widely used in high-frequency circuit board manufacture, it is also called Teflon, whose frequency is usually above 5 GHz. In addition, an FR4 or PPO substrate can be used for the product frequency between 1 GHz and 10 GHz. These three high-frequency substrates have the following differences:
Obviously, the performance of Teflon is far better than that of any other substrate. However, the Teflon substrate has the disadvantage of high cost and high heat resistance. In order to improve the PTFE rigidity and the heat resistance property, a large number of SiO 2 or glass fibers are used as the filling material.
On the other hand, due to the molecular inertia of PTFE material, which cannot be easily combined with copper foil, the special surface treatment must be carried out on the combination side. Regarding the combined surface treatment, chemical etching on the PTFE surface or plasma etching is normally used to increase the surface roughness, or an adhesive film is added between the PTFE and copper foil. However, these can affect dielectric performance.
Wanna know our customizable high-frequency PCB solutions? Can’t determine which PCB material is the best choice for your project? Reach our engineers for practical solutions
It is easy to enquire with GESP Tech. Call +86-0411-8853-5976 or email marketing@gespcb.com, the sales engineer best-suited to the nature of enquiry will be in 24 hours.