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一、引言射频功率测量通常用测辐射热器电桥来完成。测量时,控制电桥使辐射热器座的作用电阻不论是否加射频功率都保持恒定值。射频功率则由所替代的加到测辐射热器座上的直流(或低频)偏置功率来确定。有一些使这种测量的准确度下降的问题。尤其是,由于电桥电流的读数所引入的
I. Introduction RF power measurement is usually done with a bolometer bridge. During the measurement, the control bridge maintains the active resistor of the heater base at a constant value regardless of whether RF power is applied or not. The RF power is determined by the alternate DC (or low frequency) bias power applied to the bolometer block. There are some issues that make this measurement less accurate. Especially due to the reading of the bridge current