Microwave oscillator design using folded T-type slot resonator for X-band applications

In this article, Microwave oscillator was designed, fabricated, and characterized using the folded T-type slot resonator for X-band applications. The miniaturized resonator was designed by terminating the slot lines at both ends of the T-structure. The simulation and experimental results were compared and found a closed agreement between them. The oscillator using the folded T-type slot resonator showed phase noise performances of -105.54 dBc/Hz at a 100 kHz offset from the carrier frequency of 8.5 GHz with an output power of 14.06 dBm. The oscillator exhibited better phase noise characteristic due to the high unloaded Q value of the folded T-type slot resonator, which is considerably higher than that of miniaturized spurline resonators. The figure of merit of the oscillator achieved a -183.34 dBc/Hz. The feasibility of integrating that slot resonator in various monolithic microwave integrated circuit technologies can also be expected. (c) 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:28172821, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27215