def setUp(self):
        self.files_dir = os.path.join(
            os.path.dirname(os.path.abspath(__file__)),
            'qucs_prj'
            )
        self.dummy_media = DefinedGammaZ0(
            frequency = Frequency(1,100,21,'ghz'),
            gamma=1j,
            z0 = 50 ,
            )