def save(self, *args, **kwargs):
        """
        1. set polarization according to AntennaModel (self.model.polarization) when creating a new antenna
        2. inherit latitude and longitude from node
        """
        if not self.pk and self.model.polarization:
            self.polarization = self.model.polarization
        super(Antenna, self).save(*args, **kwargs)
1. set polarization according to AntennaModel (self.model.polarization) when creating a new antenna
        2. inherit latitude and longitude from node