Improved zeroth-order resonator used in microwave oscillator

In this paper, an improved zeroth-order resonator based on composite right/left-handed transmission lines is presented. Using the proposed zeroth-order resonator a novel RF microwave oscillator is designed. Because of the using of proposed zeroth-order resonator the blocking interdigital capacitor in oscillator circuit is removed, which can simplify the design process and miniaturize the circuit size. Full-wave simulations for improved zeroth-order resonator implemented with the microstrip line technology agree well with the experiments. Finally, the transient and harmonic simulations of microwave oscillator using the improved zeroth oscillator are carried out.