When engineers specify a Honeycomb Core Waveguide Panel, the first question is usually:
“What aperture size do you offer?”
While aperture size is important, it is rarely the most important parameter.
The biggest mistake in selecting a Honeycomb Core Waveguide Panel is focusing only on aperture size while ignoring the factors that actually determine shielding performance.
Do not select a honeycomb core based on aperture size alone.
Do not assume smaller apertures automatically deliver better results.
Aperture Size Is Only One Part of the Equation
A Honeycomb Core Waveguide Panel functions according to waveguide theory.
Shielding effectiveness depends on multiple parameters, including:
- Cell aperture
- Core thickness
- L/D ratio
- Frequency range
- Material conductivity
Many buyers specify:
- 3.2 mm aperture
- 6.35 mm aperture
but fail to define the required shielding effectiveness.
Without understanding the complete requirement, aperture size alone provides very little information.
Why Thickness Matters More Than Many Engineers Realize
Two honeycomb cores may use the same aperture size while delivering completely different EMC performance.
For example:
- 3.2 mm aperture × 25 mm thickness
- 3.2 mm aperture × 100 mm thickness
Both appear similar on paper.
However, their shielding effectiveness can differ significantly.
Do not compare honeycomb cores based on aperture size alone.
The L/D ratio is often far more important.
Airflow Requirements Are Frequently Ignored
Many EMC projects focus exclusively on attenuation levels.
This often leads to over-designed solutions.
Do not pursue maximum shielding effectiveness without considering airflow.
A smaller aperture and thicker core may increase attenuation, but it can also:
- Restrict ventilation
- Increase pressure drop
- Raise cooling costs
The best solution is often a balanced solution.
Installation Conditions Matter
Even a high-performance Honeycomb Shielding Core can perform poorly if installation requirements are ignored.
Engineers should consider:
- Mounting method
- Opening size
- Environmental conditions
- Maintenance accessibility
Do not specify a honeycomb core without understanding how it will be integrated into the final system.
Watch the Technical Video
For more information about honeycomb shielding technology:
Conclusion
The most common mistake when selecting a Honeycomb Core Waveguide Panel is focusing on aperture size while ignoring the broader engineering requirements.
Successful EMC designs require balancing:
- Shielding effectiveness
- Airflow
- Cost
- Installation
A properly specified honeycomb core delivers far better results than an over-specified one.
Learn more in our latest blog:
How to Choose the Right Two-Stage EMI Filter for Industrial Equipment
