Microstrip Mitred Bend Calculator

Calculator Function

This calculator helps you design microstrip mitred bends to minimize signal loss and maintain impedance matching in RF and microwave circuits. A mitred bend is an angled bend in a microstrip line that reduces the sharp corner, which can cause reflections and signal degradation.

How to Use

1. Enter the straight section length (L) of your microstrip line
2. Enter the trace width (W) of your microstrip line
3. Enter the substrate height (H) in millimeters
4. Enter the dielectric constant (ε_r) of your substrate material (default is 4.4 for FR4)
5. Enter the loss angle (δ) in degrees (default is 0.1 radians)
6. Click the "Calculate" button to compute the mitre angle and other dimensions

Formula Explanation

The calculator uses the following formula to calculate the mitre angle:

θ = 2 * arctan(W / (8 * H * tan(δ)))

Where:

• θ = Mitre angle in degrees
• W = Trace width in millimeters
• H = Substrate height in millimeters
• δ = Loss angle in degrees

Applications

Microstrip mitred bends are commonly used in:

• RF and microwave circuits
• Antenna arrays
• High-frequency PCB designs
• Signal integrity applications

Design Tips

For optimal performance:

• Aim for a mitre angle between 30° and 45°
• Ensure the outer radius is at least 3-5 times the trace width
• Consider the dielectric constant of your substrate material
• Simulate the design in your specific frequency band