Hybrid-coupled planar resonator (HPCR) arms miniaturized synthesizers

Miniaturization and integration of voltage-controlled oscillators (VCOs) at lower microwave frequencies has long been limited by the size of the planar resonator. For the popular 1-8 GHz band, the reported work describes the methodology to shrink multi-octave band VCOs to a mere 0.3times0.3times-0.08 inches, with a companion line of low-cost power-efficient reconfigurable frequency synthesizers that measure just 0.6times0.6times0.1 inches. The typical measured phase noise for 1-8 GHz synthesizer at 10 kHz offset is -90 dBc/Hz with operating DC bias 5 V, 50 mA. The settling time is less than 1 millisecond and not limited to this frequency, can be extended from 1000 MHz to 18 GHz without changing the VCOs layout and topology.