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YIG Tuned Oscillators (YTO) offer an unbeatable combination of broad band electronic tuning and extremely low phase noise. However traditional YTO designs require significant highly skilled and expensive alignment labor. Differential YTOs (DYTOs) minimizes bandwidth limiting parasitic effects and require no RF grounds. Additionally, only the phase dispersive active devices limit electronic tuning...
This paper presents a low-jitter and high output frequency resolution direct frequency synthesizer (DFS) with phase interpolator (PI) based fractional divider (PIFD) for multiple frequency clock generation. Compared to conventional DFS, the proposed architecture offers higher frequency resolution, higher maximum frequency, better phase noise and jitter performance, as well as higher switching speed...
This paper presents two frequency tuning techniques, applied to planar microwave lumped LC and CPW resonators. Both methods are based on employing the reactive loading effect of a fluid metal placed on top of planar microwave circuits. The frequency tuning is achieved by moving the fluid metal inside the micro-channel and on top of different sections of each resonator. Realization of tunable resonators...
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