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Bias analysis is a .DC analysis where the quiescent point is studied. You can make a bias analysis to determine the bias point of your circuit and see its variation with temperature, a design parameter, supply voltage.
Nothing to do specifically with RF amplifiers and resistive components. Bias analysis is a general concept that applies to all kind of circuits.
Bias point analysis determines the equilibrium (quiescent) point voltages and currents for the circuit. In bias point analysis, all of the ac sources are turned off (voltage sources shorted, current sources opened) and only the dc sources are active.
In addition, bias point analysis is used as the starting point for small-signal ac analysis. Nonlinear components such as transistors are linearized about the bias point values to determine their small-signal equivalents used in ac analysis.