Simone, M.M.SimoneLodi, M.B.M.B.LodiMuntoni, G.G.MuntoniCurreli, N.N.CurreliFanti, A.A.FantiPisanu, T.T.PisanuValente, GiuseppeGiuseppeValenteMontisci, G.G.MontisciMazzarella, G.G.Mazzarella2022-09-012022-09-012022-05-11https://hdl.handle.net/20.500.13025/6289This paper presents the design of two in-line transitions operating in Q-band for radioastronomy or satellite applications. Both employ the WR-22 rectangular waveguide. The first transition involves as end-launcher a microstrip line, the second a coaxial cable. Focus of the works is to obtain a design which simplifies the geometrical configuration by keeping a reasonable compactness and without affecting the transversal space occupation, while ensuring a good matching (return loss higher 24 dB in both cases). The performance are evaluated in terms of scattering parameters. © 2022 European Association for Antennas and Propagation.enconference paper10.23919/EuCAP53622.2022.9769474https://ieeexplore.ieee.org/document/9769474