【经验】MMIC放大器的最大输入功率分析

时间： 2022-12-02 来源：ASB

技术问答

在许多应用中，MMIC放大器可能会发生各种射频环境下的意外异常操作，从而导致放大器无法在系统中正常工作。ASB进行了大量测试，以便在放大器损坏和无法操作之前提供最大输入功率的电平，有助于用户实现更安全的系统设计。

测试程序

测试是在50Ω/75Ω的评估板上，搭配负载条件（ZL=50Ω/75Ω）下进行

第1步：测试前在设备上测量I_d和S₂₁。
第2步：使用静态RF P_IN（20dBm，CW）测试设备16小时。
第3步：测试后在设备上测量I_d和S₂₁。

失效标准：I_d变化10%，S₂₁变化1dB。

第4步：随着P_IN从20dBm增加到30dBm，测量器件的烧毁程度。

图1 测试配置

测试结果

50Ω：

75Ω：

衰减器75Ω：

SPDT 50Ω：

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