Some features of designing an ultra-wideband microwave voltage-controlled oscillator (VCO) are reviewed in this article. The developed microstrip VCO is realized by means of hybrid technology. It has achieved an oscillation bandwidth of 6-12 GHz. As a result of studying the ultra-wideband VCO, we have determined the basic structure of the generator and formulated the requirements for its control elements. We have developed a method for designing the microwave VCO’s output-matching circuits. Using these output circuits allows achieving ultra-wideband characteristics. As result, a hybrid microstrip circuit of the ultra-wideband VCO has been designed. Standard SMD-components are used in the developed VCO circuit. The VCO’s main parameters are not inferior to similar products of the leading manufacturers of microwave devices. Citation:Nikitin A.B., Khabitueva E.I. The features of design of an ultra-wideband microwave hybrid vco. St. Petersburg State Polytechnical University Journal. Computer Science. Telecommunications and Control Systems, 2017, Vol. 10, No. 4, Pp. 41–50. DOI: 10.18721/JCSTCS.10404