Key Technique Research Of 60GHz Power Source

This thesis presents a novel power source with high output power based on CMOS technonogy to accommodate the problem of low output power of present 60GHz front-end. This power source is comprised of rotary standing wave oscillator (SWO) array, differential power amplifier array and "TE101-λ/4" power combiner. Because of the network topology characteristic, it can combine numbers of power amplifier'output power effectively to gain high output power. These power amplifiers are arrayed like matrix format in IC. In the first part, the principle and equivalent circuit model of SWO are studied. All of SWO performance like frequency, amplitude, start-up condition, phase noise, and power dissipation are changed to posynomial form by curve fitting. Thus the complex circuit parameters optimization problem is relaxed to be a geometric programming (GP) problem, which can highly improve the design efficiency. Experiments results of SWOs with different frequency show the simulation results are closely to GP optimization results, so the equivalent circuit model is very precise around quite wide frequency range. Using the GP optimization method, we designed a 30GHz rotary SWO array based on 0.18μm CMOS technology. The simulated frequency is 30.35GHz with phase noise of -101.86dBc/Hz@1MHz, amplitude of 0.25V and 161mW power dissipation. All of them meet the origin design needs. The entire circuit aera is 800×990μm2. This design method can be used to design 60GHz rotary SWO array in 0.13μm CMOS technology too. The second part introduces a "TE101-λ/4" power combine structure, which can couple the energy of differential power amplifiers'λ/4 standing wave resonators (λ/4-SWR) into a TE10 mode rectangle cavum resonator (RCR). This structure can be realized in package level, so it has low loss and high quality factor (Q). In this part of the thesis, the theories and design methodology of bothλ/4-SWR and RCR, the coupling methods between them are firstly analyzed. Finally a 60GHzλ/4-SWR, a 60GHz RCR, a 60GHz "TE101-λ/4" power combine structure are simulated by 3D EM simulation software to demonstrate the feasibility of the proposed scheme.