An ultra-fast frequency hopping spread spectrum transceiver front-end architecture is presented that provides 20dB of processing gain at RF for the first time. This enables the receiver front-end to supress any in-band interferes by 20dB before they arrive at the LNA. The circuit consists of passive mixers and agile digital oscillator/DAC engines that are capable of quickly moving in the frequency domain with very low power. A transient hop time of 1.5ns is achieved in this design. The front-end implemented in 65nm CMOS technology, occupies an active area of 3.lmm2, and consumes 24mW (=PTX=PRX) from a 1V power supply for a center frequency of 1GHz.