... .W.R :<1.5 : 1Impedance: 50Ω GSM signal receiver plus antenna, is used for mobile phone signal appears unstable, call off, this phenomenon ... order to help solve the problem, we specifically designed for GSM mobile phones This portfolio. Can use in the car, home, mountain ... strong on some of the local The third step: a mobile phone signal on the receiver, but also according to their own ...