A 208-GHz Injection Locking Doubler Chain With 3.2% PAE and 2.9-mW Output Power in CMOS Technology

This letter presents an injection locking doubler chain centered at 208 GHz in 65-nm CMOS technology. The doubler chain consists of a doubler and two injection locking oscillators (ILOs). The doubler uses push–push topology to generate wideband second-harmonic output. Both ILOs are based on T-embedding network oscillator for high gain and high efficiency. The measured injection locking range is 18...