This paper presents a kind of differential-mode current injection testing technology .The equal response voltage on the equipment port was regarded as equivalent principle .The injection and radiation response analysis model and the injection volt-age source extrapolation model were established .The conditions of using injection as a substitute for radiation were determined . Moreover ,this paper discussed the implementation technology of differential-mode current injection .The function and structure de-sign scheme of the auxiliary test equipment was proposed .The equivalent relation between injected voltage and radiated field was derived .On the basis of the above ,the differential-mode current injection test method was summarized .Finally ,the test results of typical RF front-end system verify the validity of the proposed method .%本文对一种新型的宽频带差模电流注入试验技术进行了研究。以设备端口的响应电压相等作为等效依据，建立了差模电流注入与辐照响应的分析模型和强场条件下注入电压源外推模型，确定了差模电流注入与强场辐照等效应满足的条件。研究了工程上差模电流注入的实现技术，确定了辅助试验设备的功能、结构设计方案，推导了注入电压与辐照场强之间的等效对应关系，提出了基于定向耦合装置的宽频带差模电流注入试验新方法。通过对典型射频前端系统进行辐照与注入试验研究，验证了该试验方法的有效性。
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