RF Reverberation Chamber Manufacturer in India

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ECOTONE™ Provides Design Consultancy and also takes turnkey projects of the RF Reverberation Chamber. These chambers are needed to test the characterization of the acoustical properties of materials. These chambers are useful to test the STL / NRC performance of acoustic material.

RF Reverberation Chamber

  • An RF Reverberation Chamber, sometimes referred to as a mode tune/mode stirring chamber, is a shielded enclosure or resonance cavity for RF testing. This cell is a statistically isotropic, random polarity, with RF uniformity within specified limits. Typically, an RF Reverberation chamber consists of a paddle (or tuner) that stabilizes the field, randomizing the boundary conditions. There are two types of Reverberation test methods. “Mode tuned” refers to when the paddle is moved to a position, and then the RF Reverberation Chamber is applied for a sufficient period for the equipment to exercise. In the Ecotone, the tuner can be run by a computer-controlled stepper motor that also drives RF generation and monitoring equipment. The second type is “mode stir” when the paddle is applied for a complete paddle revolution with constant RF energy. The paddle speed is varied to meet the specific requirements of the device under test. In both methods, a complete turn of the paddle applies RF energy to all sides of the device in one pass. This dramatically simplifies the process compared to direct illumination testing. 
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What are the benefits of RF Reverberation Chamber Testing?

  • The benefits of recycled testing are many. RF is applied to all exposed sides of the device under test during a complete 360 ° turn of the pad, rather than a single side. For direct illumination testing, several standards require that all apertures of DUT be illuminated. It can also be challenging – impossible on complex objects. When applying direct illumination, the required window impact test is not necessary during reverb testing because the field intensity is constantly changing. Test iteration is much easier to achieve in a reverb chamber with appropriate procedures, and running the test is much less complex than a single aspect angle test. Antenna distance, target (focus), 3DB beam width, location of field probe, EUT layout, and EUT location in amount of work are all less than a factor in the iteration of the test.
 

When is an RF Reverberation chamber used?

  • RF Reverberation chambers help radiation sensitivity, radiated emissions (total radiation power), shielding effectiveness, and many other troubleshooting scenarios for equipment used in the aerospace, defense, and automotive sectors. In SAE ARP 5583, the reverb test method is called the preferred method, stating that reverb method testing is the recommended and preferred method to show compliance for large or complex level A (flight-critical) systems.
  • FAA, AEROCAE, RTCA, and major airframe manufacturers (i.e., Boeing, Airbus, etc. .) are “preferred” over the anechoic Chamber, due to time and cost savings, as well as the robustness of the reverb test method. Direct illumination technique.
  • You should know if the reverberation test is suitable for your program. Reverb chambers are random in polarity, which makes it challenging to determine the directivity of RF energy. Testing multiple field levels on a system, such as outside the pressure vessel level and inside the pressure vessel level, can be difficult; All appliances in the Chamber are in contact with the same area. Pulse width has limitations due to a large amount of stored energy in the high Q (efficient) chamber. If you have small, simple instruments, single aspect angle tests can be fast and sufficient for test coverage. There are ways to compensate for each, and an Ecotone engineer can help with the suggestion or assist you with a test plan.
  • Both direct illumination and Reverberation test methods are acceptable routes for authentication. They both have advantages and drawbacks that each champion as a testing method. Fortunately, Ecotone can test in both methods and engineering expertise to support its certification path.

Properties:-

    • 775 Watt/m2 Power Handling.
    • Comply with NRL 8093 standards.
    • ROHS Compliance & Long performance Warranty.

 

The rf reverberation chamber design shall meet the test standards (STL) of airborne sound as per IS-9901(Part III) – 1981, DIN 52210 part IV – 1984, ISO: 140 (Part III) – 1995 & test standers for (NRC) airborne sound absorption of Building Elements as per IS: 8225/ISO: 354/ASTM423C.

The designed reverb chamber consists: a source room, a receiver room, adequate diffusion ( stirrer) existed in both the chambers, a receiving antenna, and a transmitting antenna, there are no absorbers. In a reverb chamber, the aim is to create standing waves that are used to generate high field strengths. 

The size/volume of the rf reverberation chamber 

]should depend upon the test object if these are the vehicles / large machine then its size should enable DELTA to generate immunity radiation on vehicles and large machines and if these are building products then the size of the chamber may be smaller. Testing of lower frequencies requires a large chamber to create the standing waves, the chamber must be at least half a wavelength even for a small test object.

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