This interactive calculator is designed to help RF engineers, material scientists, and electronics professionals estimate the dielectric constant (Dk) and the loss tangent (tan δ) of a material at a specific target frequency, based on known values at two reference frequencies.

🔍 What It Does

The calculator performs a linear interpolation between two known data points for both Dk and tan(δ), which are typically measured at different frequencies. By entering these values, users can instantly estimate how a material’s electrical properties behave at any frequency within the given range.

🛠️ How to Use It

1. Input Dk and tan(δ) values at the starting and ending frequencies.

2. Choose the units (Hz, MHz, or GHz) for each frequency field.

3. Enter the target frequency where you want to estimate Dk and tan(δ).

4. Click Calculate to see:

   • The interpolated Dk value at the target frequency.

   • The slope (rate of change) of Dk across the frequency range.

   • The estimated loss tangent (tan δ) at the target frequency.

ℹ️ Note: The target frequency must fall between the start and end frequencies. If it’s outside this range, the calculator will notify you, as extrapolation is not supported and could lead to inaccurate results.

💡 Why It’s Useful

In high-frequency PCB design, antenna engineering, and material testing, knowing how the dielectric constant and loss tangent vary with frequency is critical for:

• Ensuring signal integrity

• Minimizing losses

• Choosing appropriate substrate materials

• Optimizing performance in RF and microwave circuits

This tool eliminates the need for manual calculations and helps you make informed design decisions quickly and accurately.