Patent ID: 8723531
Filing Date: 2014-05-13
Classification: G01R

Abstract:
1. An RF circuit assembly comprising: an n-stage amplifier disposed along a communication path and configured to amplify an RF signal, the communication path including an output port configured to couple to an antenna; a voltage standing wave ratio (VSWR) detector circuit including a first detector disposed along the communication path within the n-stage amplifier and configured to measure incident power of the RF signal, a second detector disposed along the communication path after the n-stage amplifier and configured to measure a combination of incident and reflected power of the RF signal, and a comparator configured provide a comparator output signal based on a comparison of the incident power and the combination of incident and reflected power, the comparator output signal indicating an impedance of the coupling; and a controller configured to select the first detector of the VSWR detector circuit to measure RF signal power during operation of the RF circuit assembly when the comparator output signal is greater than an amount and to select the second detector of the VSWR detector circuit to measure the RF signal power during operation of the RF circuit assembly when the comparator output signal is less than the amount.