Patent ID: 8874045

Claim:
An isolation detecting device adapted to be disposed in a first radio frequency (RF) circuit for receiving an attenuated RF signal at a received transmission power and resulting from an original RF signal, which is transmitted by a second RF circuit at a preset transmission power, and for measuring an isolation value that represents a degree of isolation between the first RF circuit and the second RF circuit with respect to a frequency of the original RF signal, said isolation detecting device comprising: a power sensor; a signal receiver connected electrically to said power sensor, adapted for receiving the attenuated RF signal, and transmitting at least part of the attenuated RF signal to said power sensor, said power sensor converting said at least part of the attenuated RF signal into a voltage signal; an analog-to-digital converter connected electrically to said power sensor for receiving the voltage signal therefrom, and converting the voltage signal into a numerical value associated with the attenuated RF signal; and a processing module connected electrically to said analog-to-digital converter for receiving the numerical value therefrom, and having stored therein the preset transmission power and at least one reference set associated with a test RF signal, said at least one reference set containing a predetermined transmission power and a predetermined numerical value; wherein said processing module determines the received transmission power of the attenuated RF signal with reference to the numerical value associated with the attenuated RF signal and said at least one reference set, and further determines the isolation value by subtracting the received transmission power from the preset transmission power.