RF shielding effectiveness is tested using a variety of methods, including both laboratory and field testing. These tests are designed to measure the ability of a shielding material or enclosure to block or absorb RF signals, and to determine its effectiveness in preventing RF interference.
The following are common methods for testing RF shielding effectiveness:
- Shielding Attenuation Test: This test measures the reduction in RF signal strength as it passes through a shielding material or enclosure. The test is performed by transmitting a known RF signal at the shielding material, and measuring the reduction in signal strength on the other side. The shielding effectiveness is calculated as the ratio of the incident and transmitted signal strength.
- Electromagnetic Field Probe Test: This test measures the RF field strength outside and inside a shielded enclosure, and is used to determine the effectiveness of the shielding in preventing RF interference. A small electromagnetic field probe is used to measure the RF field, and the results are compared to the specified test limits.
- Far-Field Radiation Test: This test measures the amount of RF energy that is radiated from a device or equipment, and is used to determine its compliance with regulatory requirements for RF emissions. The test is performed using a specialized measurement setup and equipment, and the results are compared to the specified test limits.
- Conducted Immunity Test: This test measures the ability of electronic equipment to function in the presence of RF signals, and is used to determine its immunity to RF interference. The test is performed by exposing the equipment to a known RF signal, and measuring its performance and functionality.
- Radiated Immunity Test: This test measures the ability of electronic equipment to function in the presence of RF signals, and is used to determine its immunity to RF interference. The test is performed by exposing the equipment to a known RF signal, and measuring its performance and functionality.
In conclusion, RF shielding effectiveness is tested using a variety of methods that are designed to measure the ability of a shielding material or enclosure to block or absorb RF signals, and to determine its effectiveness in preventing RF interference. These tests are important for ensuring the reliable operation and functionality of electronic equipment in the presence of RF signals, and for ensuring compliance with regulatory requirements for RF emissions and immunity.
Expert Shielding Effectiveness Laboratory Compliance Testing
In addition to EMC shielding effectiveness testing, Keystone has a full scope of expertise including environmental and package testing such as accelerated aging, vibration, and cold chain. Our team strives to give our customers more time and energy on product development instead of testing.
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