An ordinary RF detector using tuned LC circuits is not suitable for detecting signals in the GHz frequency band used in mobile phones. The transmission frequency of mobile phones ranges from 0.9 to 3 ...

Mobile phones and Satellite devices generally use 2 to 3.5 Gigahertz signals. ... GHz Signal Detector Circuit Diagram. CA 3130 ( IC1) is a CMOS version high speed switching Operational amplifier with ...