The transversal electromagnetic mode which can developed in the DTEM cell, provides the opportunity for doing EMC testing inside the cell. In principle, the DTEM cell is a coaxial line expanding rectangularly and with planar septum. The geometrical dimensions having a line impedance of Z = 50 Ω. At the end, the line is matched by a 50 Ω termination. Typical for this cell is the low power request for high field strength values.
DTEM 測試室內可產生橫向電磁模式（Transversal Electromagnetic Mode, TEM），使其能夠進行電磁相容性（EMC）測試。
原理上，DTEM 測試室為一矩形擴展的同軸傳輸線結構，內部設有平面隔板（Planar Septum），其幾何尺寸設計對應於特性阻抗 Z = 50 Ω。在測試室末端，設有 50 Ω 匹配終端以吸收反射能量。此類測試室的一大特點是：在需要產生高場強的情況下，所需的功率非常低。
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TEM cell meets ISO 11452-3 and CISPR 25
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EMC tests for vehicle components immunity to RF fields
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300 mm septum height
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Up to 1 kW input powe
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Access for field probes from the top of the cell
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TEM 測試室符合 ISO 11452-3 與 CISPR 25 標準
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適用於車用電子零組件對射頻場的電磁相容（EMC）抗擾度測試
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300 mm 隔板高度
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最大輸入功率可達 1 kW
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可從測試室頂部插入場強探棒進行測量
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IEC / EN Basic Standards : IEC 61000-4-20
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CISPR Standards : CISPR 25
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Automotive Standards : ISO 11452-3 SAE J1113-24
