What is the loss tangent of FR4?
Table of Contents
Properties
| Parameter | Value |
|---|---|
| Dielectric Constant (εr) | 3.9 – 4.7, 4.4 @ 1 GHz (Supplier Isola) |
| Loss Tangent (tanδ) | 0.02 – 0.03, 0.030 @ 1 GHz |
| Glass transition temperature | Can vary, but is over 120 °C |
| Young’s modulus – LW | 3.5×106 psi (24 GPa) |
What is relative permeability of FR4?
For the dielectric FR4 substrate, the relative permittivity is around 4.0, and the relative permeability is around 1.
What resin is used in FR4?
Glass Epoxy
Glass Epoxy (G10, FR4) Characteristics Epoxy resins are widely used in electronic applications because they are virtually impervious to moisture. As a thermoset material, glass epoxy has outstanding mechanical and electric strength as well as good dielectric properties.
What is the dielectric loss tangent of FR-4 substrate?
The dielectric loss tangent of the FR-4 substrate is around 0.02. This makes the board impractical to use above 2 GHz due to high losses. The dielectric constant of the FR-4 is also frequency dependent and varies with frequency.
What is the loss tangent of FR4 PCB?
It may start with 4.4 at frequencies lower than 1 GHz and decreases to less than 4.25 beyond 4 GHz. The characteristics of this PCB type vary also from manufacturer to another. Although the exact value of the loss tangent depends on the manufacturer of the FR4 board, the common values range between 0.017 and 0.025.
Is FR-4 an anisotropic material?
Because of the high loss tangent, don’t try to make any filter structures! Properties of FR-4. ER=4.7 (has been reported between 4.35 and 4.8, and is slightly frequency dependent and varies by manufacturer and lot-to-lot) When it comes to delectric constant, FR-4 is an example of an anisotropic material.
What is the delectric constant of FR-4?
ER =4.7 (has been reported between 4.35 and 4.8, and is slightly frequency dependent and varies by manufacturer and lot-to-lot) When it comes to delectric constant, FR-4 is an example of an anisotropic material. FR-4 is rated to 140C by Underwriter Laboratories.