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Tekbox TBTC1 TEM Cell

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    Tekbox TBTC1 TEM Cell

    Manufacturer: Tekbox Digital Solutions

    Price: $599.00

     

    • Description
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    Radiated emission tests are typically carried out in anechoic chambers, using antennas to pick up the radiated signals. Due to bandwidth limitations, several antennas are required to cover the complete frequency range. Furthermore, it requires much space and the cost of the equipment for a standard conformant setup is immense.

    Engineers often have to rely on experience and on best practice methods in order to design an EMC-compliant product. But > 50% of products fail testing first time around. Failing is very expensive. Not only that, re-testing costs are high, and the project schedule and market introduction gets delayed. What is needed is an affordable laboratory set up to measure radiated emissions in the own lab, prior to compliance testing. A TEM cell (Transverse ElectroMagnetic Cell) is the best piece of equipment for desktop testing of radiated emissions. Tekbox developed the TBTC1 to cover the complete frequency range up to 2GHz and with usability even at frequencies beyond. 

    Combined with a spectrum analyzer, products can now be tested before and after EMC-related design modifications.  A set-up with a TEM cell will not deliver exactly the same quantitative results as a measurement in a certified test house, but it will give an excellent indication of whether the design suffers from excessive radiated noise or not.  The engineer will clearly see, whether changes improve or worsen the EMC performance or remain unchanged. The TBTC1 eliminates the guesswork.

    A TEM cell is a stripline device for radiated emissions and immunity testing of electronic devices. It is not a replacement, but due to its size and cost it is a convenient alternative to measurements in an anechoic chamber.

    A TEM cell consists of a septum, the conductive strip in the center section and walls which are connected to ground. The geometry is designed to present a 50Ω stripline. The device under test (DUT) is placed between the bottom wall and the septum.

    The TBTC1 is a so called “open TEM cell” which has no side walls for convenient placement of the DUT. It may pick up RF background noise, but this can be taken into account by doing a “null” measurement of the cell output signal before powering on the DUT. 

    The TBTC1 has a better frequency response compared to most standard TEM cells of similar size. TEM cells suffer from higher order wave modes which limit the usable bandwidth. A unique design feature of the TBTC1 implements resistance perpendicular to the desired propagation direction of the wave. Consequently higher order wave modes and resonances are suppressed.

    The device is supplied together with a 50Ω/25W RF termination and a DC block to protect the spectrum analyzer or RF receiver input.

     

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