def KK_RC4(w, Rs, R_values, t_values):
    """
    Kramers-Kronig Function: -RC-
    
    Kristian B. Knudsen (kknu@berkeley.edu / kristianbknudsen@gmail.com)
    """
    return Rs + R_values[0] / (1 + w * 1.0j * t_values[0]) + R_values[1] / (
        1 + w * 1.0j * t_values[1]) + R_values[2] / (1 + w * 1.0j * t_values[2]
        ) + R_values[3] / (1 + w * 1.0j * t_values[3])
