| 摘要 |
PURPOSE:To improve the reproducing accuracy of the test of the anti- electromagnetic environment adequacy EMC of an electronic device or the like by providing a 2nd inner conductor between an outer conductor and an inner conductor, applying a high frequency to the 2nd inner conductor so as to keep the characteristic impedance of a high frequency current injection device constant depending on the characteristic impedance. CONSTITUTION:The 2nd inner conductor 51 along the axis of a high frequency current injection tube 120 is provided between the outer conductor 20 and the inner conductor 22 and a high frequency current is injected from one terminal of the 2nd inner conductor 51 by a high frequency oscillator 10. Moreover, the characteristic impedance of the high frequency current injection tube 120 is set nearly equal to the characteristic impedance of a terminator 14 and an output impedance of the high frequency oscillator 10. Thus, the reduction of the characteristic impedance of a body to be tested due to the wiring of a wire harness is suppressed and the test of the EMC (Electro Magnetic Compatibility) of an electronic device or the line to the high frequency current is conducted stably with reproducing accuracy.
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