Honeycomb Waveguide Panels
EMI/RFI Shielded Ventilation Panels 3000 Series
MAJR’s Honeycomb Waveguide panels are designed to provide optimum EMI/RFI shielding with minimum pressure drop while ventilating air.
The special honeycomb media is designed to allow air to flow into and out of EMI/RFI shielded areas, typically through standard or custom sized ducts and secure room apertures. This honeycomb media helps facilitate the cooling of electronics and sensitive equipment as well as providing needed air circulation for manned military shelters, SCIFS and secure rooms and buildings. Our Honeycomb Waveguide panels can be provided in a variety of materials and configurations to meet specific requirements such as ICS / ICD 705 compliance.
Standard Products
Honeycomb Waveguide Panels special design lets air flow into and out of an EMI/RFI shielded enclosure. This feature allows for the cooling of electronics as well as air circulation for manned military shelters as well as electronic boxes and cabinets.
Honeycomb Waveguide Panel Features:
- Designed to meet specific shielding, airflow, and mounting requirements.
- Available in Aluminum, Steel, Brass and Stainless Steel to meet specific attenuation and environmental requirements of MIL-STD-461 and MIL-STD 810.
- High permeability steel honeycomb available for magnetic (H-Field) shielding to 60 dB attenuation levels. (>80 dB attenuation using 1 in. thick tin plated steel honeycomb).
- Standard and custom sizes and mounting configurations available.
An EMI/RFI gasket is always supplied as an integral part of the honeycomb vent panel assembly. - Mounting via frame thru-holes or captive fasteners.
- Metal honeycomb core provides shielding to electromagnetic waves, facilitating waveguide beyond cuttoff.
- ICS / ICD 705 compliant
HVAC Products
How To Determine The Best Waveguide For Your HVAC Project
HVAC Waveguides are ready-to-install, ICS / ICD 705 compliant, EMI/RFI shielded panels in standard or custom sizes and are made from brass, steel or aluminum. Configuration of your waveguide panels depends on:
- Required shielding levels (ex: 60 dB shielding at 10 GHz)
- Magnetic field requirements
- Outside dimension measurements
- Mounting Method (ex: Mount into ductwork, Captive fasteners, etc.)
- Airflow requirements
Technical Info
Shielding Effectiveness vs Frequency
Shielding Effectiveness dB
| Field | Aluminum Non-hexavalent Chromate Finish Material Code – 90 0.5” thick x .125” cell Frequency |
|||||
| 1 MHz |
100 MHz |
500 MHz |
1 GHz |
10 GHz |
18 GHz |
|
| E | 60 | 50 | 50 | — | — | — |
| PW | — | — | — | 45 | 40 | 40 |
| Field | Aluminum – Tin Plate Material Code – 42 0.5” thick x .125” cell Frequency |
||||||
| 1 MHz |
100 MHz |
500 MHz |
1 GHz |
10 GHz |
18 GHz |
||
| E | 100 | 90 | 85 | — | — | — | |
| PW | — | — | — | 80 | 70 | 60 | |
| Field | Brass Material Code – 43 1.0” thick x .125” cell Frequency |
||||||
| 1 MHz |
100 MHz |
500 MHz |
1 GHz |
10 GHz |
18 GHz |
||
| E | 75 | 95 | 110 | — | — | — | |
| PW | — | — | — | 105 | 85 | 85 | |
| Field | Brass Material Code – 43 1.0” thick x .188” cell Frequency |
||||||
| 1 MHz |
100 MHz |
500 MHz |
1 GHz |
10 GHz |
18 GHz |
||
| E | 70 | 80 | 80 | — | — | — | |
| PW | — | — | — | 85 | 75 | 65 | |
| Field | Brass Material Code – 43 0.5” thick x .125” cell Frequency |
||||||
| 1 MHz |
100 MHz |
500 MHz |
1 GHz |
10 GHz |
18 GHz |
||
| E | 60 | 80 | 80 | — | — | — | |
| PW | — | — | — | 80 | 75 | 70 | |
| Field | Steel – Tin Plate Material Code – 44 1.0” thick x .125” cell Frequency |
|||||||
| 10 kHz |
100 kHz |
1 MHz |
100 MHz |
500 MHz |
1 GHz |
10 GHz |
18 GHz |
|
| H | 40 | 55 | — | — | — | — | — | — |
| E | — | — | 75 | 100 | 120 | — | — | — |
| PW | — | — | — | — | — | 120 | 120 | 115 |
| Field | Steel – Tin Plate Material Code – 44 1.0” thick x .188 cell Frequency |
|||||||
| 10 kHz |
100 kHz |
1 MHz |
100 MHz |
500 MHz |
1 GHz |
10 GHz |
18 GHz |
|
| H | 40 | 55 | — | — | — | — | — | — |
| E | — | — | 75 | 100 | 100 | — | — | — |
| PW | — | — | — | — | — | 110 | 110 | 110 |
| Field | (Corrosion Resistant) Painted Steel with Brass Frame Material Code – 39 1.0” thick x .125” cell Frequency |
|||||||
| 10 kHz |
100 kHz |
1 MHz |
100 MHz |
500 MHz |
1 GHz |
10 GHz |
18 GHz |
|
| H | 40 | 55 | — | — | — | — | — | — |
| E | — | — | 75 | 110 | 110 | — | — | — |
| PW | — | — | — | — | — | 110 | 95 | 85 |
The data in Table shows shielding characteristics for standard MAJR shielded vents. Note that the data indicated is tested under laboratory conditions per MIL-STD 285. This data is for comparison between shielded vent panel configurations and is not to be stated as a pass/fail specification for a manufactured EMI/RFI waveguide vent panel.
Yellow chromate (-32) finish available upon request. Tin Plated Steel (-44) data reflects a steel honeycomb and steel frame construction. Not all mounting frame options are available in steel.
For more information on Shielding Effectiveness, download this White Paper – Why Testing Matters in EMI/RFI/EMP Shielding
Design Data: Airflow
