Pellaton, M.Affolderbach, C.Skrivervik, AnjaIvanov, A.E.Debogovic, T.de Rijk, E.Mileti, G.2018-10-122018-10-122018-10-12201810.1049/el.2017.4176https://infoscience.epfl.ch/handle/20.500.14299/148814The authors present the realisation and characterisation of an additively manufactured (AM) microwave resonator cavity for double-resonance (DR) vapour-cell atomic clocks. The design of the compact microwave cavity is based on the loop-gap resonator approach, previously demonstrated for conventionally-machined aluminium components. In the present study, the resonator is fabricated by AM using a metal-coated polymer. A resonance frequency at the desired 6.835 GHz rubidium atomic frequency is obtained. When employed in an atomic clock setup, the AM cavity enables a DR signal of <;500 Hz linewidth and of nearly 20% contrast, thus fulfilling the stringent requirements for DR atomic clocks. A clock short-term stability of 1 × 10 -12 τ -1/2 is demonstrated, comparable to state-of-the-art clock performances.text::journal::journal article::research article