10 cm range small-size reference microwave oscillator on a coaxial resonator with a PLL and a low level of phase noiseSergey Samokhin, Ivan Goryunov, Viktor Iovdalskiy, Еvgeniy Teryoshkin and Nikolay FyodorovITM Web Conf., 30 (2019) 01007DOI: https://doi.org/10.1051/itmconf/20193001007