The Features of High Frequency PCB

What is High Frequency (HF) PCB

Digital gadgets with high frequency are the establishing propensity nowadays, particularly in cordless networks. Satellite interaction proliferating, info items relocate in the direction of broadband and also high frequency. Hence creating brand-new items constantly require making use of high-frequency substratum, satellite system, mobile telephone getting base station, and so forth, these interaction items need to utilize high-frequency PCB.

High-Frequency PCB Features

• 1. DK ought to be tiny and also secure sufficiently, typically the smaller sized the much better, high DK might bring about signify transmission hold-up.
• 2. DF needs to be little, which generally impacts the top quality of signal transmission, the smaller sized DF can make smaller sized signal waste as necessary.
• 3. The thermal expansivity must coincide with copper aluminum foil as high as feasible since the distinction will certainly bring about copper aluminum foil divided in the adjustments of chilly and also warmth.
• 4. Water absorptivity has to be reduced, high water absorptivity will certainly influence DK as well as DF when in a damp atmosphere.
• 5. Heat-resisting home, chemistry standing up to, effect endurance, remove standing up to need to be great.

High Frequency PCB Quote

HF PCB Materials

High-frequency PCB for cordless applications and also information prices in the top GHz array have unique needs on the product made use of:

• 1. Adjusted permittivity.
• 2. Reduced depletion for reliable signal transmission.
• 3. Uniform building and construction with reduced resistances in insulation density as well as dielectric consistent.

Typically talking, high frequency can be specified as regularity over 1GHz. Presently, PTFE product is extensively made use of in high-frequency PCB production, it's additionally called Teflon, which regularity is generally over 5GHz. Besides, FR4 or PPO substratum can be utilized to the item regularity amongst 1GHz ~ 10GHz. These 3 high-frequency substrata have listed below distinctions:
Worrying the laminate expense of FR4, PPO, and also Teflon, FR4 is the least expensive one, while Teflon is one of the most pricey ones. In regards to DK, DF, water absorption, and also regularity attribute, Teflon is the most effective.  When item applications call for regularity over 10GHz, just can we select Teflon PCB substratum to make.

The efficiency of Teflon is much better than various other substrata, Nevertheless, the Teflon substratum has the negative aspect of high expense and also huge heat-resisting building. To enhance PTFE tightness as well as heat-resisting residential property features, a multitude of SiO2 or fiberglass is the loading product.

On the other hand, because of the particle inertia of the PTFE product, which is hard to integrate with copper aluminum foil, therefore, it requires to do the unique surface area therapy on the mix side. Worrying mix surface area therapy, typically make use of chemical etching on PTFE surface area or plasma etching to plus surface area roughness or include one glue movie in between PTFE and also copper aluminum foil, yet these might affect dielectric efficiency.