Fault tolerance analysis and measurement of a spatial power amplifier

The performance degradation due to device failures in a spatial power combining system is presented in this paper, including analysis and measurement. For this study, a 5/spl times/5 amplifier array, employing 17 dBm (P1 dB) MMIC amplifiers, has been designed and tested. Individual unit cells have been turned off in order to represent a system with device failures. Results for both simulated and measured array performance versus device failures are given.