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| Refurbished RF Shielded Rooms |
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CIR Enterprises, Inc. is a family owned business with over 40 years of combined RF experience. Our company is dedicated to providing premier customer service. The new Florida location is up and running. |
CIR Modular RF Shielded Room Services |
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Solid Wall & Copper Screen Specializing in RF Shielded Rooms Relocation & Door Maintenance
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Shielded rooms will provide up to 100db min. of attenuation from 14 KHz to 10 GHz when subject to electric fields and plane waves.
We specialize in shielded enclosure relocation, modification, refurbishment, installation, and RF testing.
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RF Shielded rooms provide the necessary RF quiet environment in which to conduct many different application tests such as EMC, wireless technology on automotive or military vehicles, MRI scans, etc. These rooms are built with modular RF shielding, electromagnetic pulse protection EMP shielding, TEMPEST (secure communications) shielding and architectural shielding systems. The RF shielded room keeps electromagnetic signals from leaving the room and prevents electomagnetic interference (EMI) from entering the room. |
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Typical Shielding Attenuation Characteristics |
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Model |
Magnetic 15KHz |
Electric/Plane Waves 10KHz to 1GHz |
Microwave 10GHz |
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CIR |
55dB |
100dB |
100dB |
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Shielding effectiveness values are expressed in logarithmic, not linear, terms. Therefore, 80 dB of shielding effectiveness is not double the 40 dB level, but 100 times greater. Another way to express effectiveness is attenuation ratio, which compares the attenuation signal strength outside and inside the shield as shown below. |
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| 40 dB | 100 times reduction of the field strength |
| 60 dB | 1,000 times |
| 80 dB | 10,000 times |
| 100 dB | 100,000 times |
| 120 dB | 1 million times |
| 140 dB | Difficult to measure, typically only used in scientific applications |
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