Optimization Design Of Rotary Traveling Wave Oscillator And Analysis Of Coupled Resonator Array Based On Substrate Integrated Waveguide

This thesis is comprised of two sections. In the first section, the modeling, optimization and control of rotary traveling wave oscillator (abbrv. RTWO) are studied. The equivalent transmission line model of RTWO is fully analyzed based on the transmission line theory and the large signal capacitive model of MOS transistors. The equations of transmission line parameters and performance measures such as frequency, start-up condition, phase noise, and power dissipation are formulated in posynomial form by curve fitting. The optimization problem is thus relaxed to be a geometric programming (abbrv. GP) which could be efficiently solved with a convex optimization solver. Comparing to the power-unaware design, low-power experimental results show that up to 83.12% of DC dissipation is reduced for a 12GHz.design. Compared with an existing binary iterative method, the proposed scheme is more efficient and results in design with lower power dissipation and better signal waveforms. At the last of this part, a novel scheme to control the rotation direction of traveling wave is also suggested for skew control.The second section proposed a novel resonator array based on substrate integrated waveguide resonator (abbrv. SIWR) to accommodate the problem of low output power of present 60GHz front-end. This resonator array is comprised of numerousλ/4 transmission line standing wave resonator(abbrv.λ/4-SWR) and SIWR which are coupled together to combine the output power ofλ/4 transmission line standing wave oscillator(abbrv.λ/4-SWO) to achieve an output power of about 1 watt at 60GHz. The network characteristic of the resonator array could increase the robustness of the system.The SIWR and the differential lines of could be fabricated at package level to save the chip area and to reduce the design complexity and total cost. Specifically, the differential lines ofλ/4-SWR could be implemented by the vias in the package to largely increase the quality factor. In this part of the thesis, the theories and design methodology of bothλ/4-SWR and SIWR are firstly analyzed; design examples and simulation results are given. Secondly, ways of couplingλ/4-SWR and SIWR together are analyzed and the 3D EM simulation results are showed to demonstrate the feasibility of the proposed scheme.