This paper gives an overview of recent achievements in microwave micro‐electromechanical systems (microwave MEMS) at KTH Royal Institute of Technology, Stockholm, Sweden. The first topic is a micromachined W‐band phase shifter based on a micromachined dielectric block which is vertically moved by integrated MEMS actuators to achieve a tuning of the propagation constant of a micromachined transmission line. The second topic is W‐band MEMStuneable microwave high‐impedance metamaterial surfaces conceptualized for local tuning of the electromagnetic resonance properties of surface waves on a high‐impedance surface. The third topic covers 3‐dimensional micromachined coplanar transmission lines with integrated MEMS actuators which move the sidewalls of these transmission lines. Multi‐stable switches, tuneable capacitors, tuneable couplers, and tuneable filters have been implemented and characterized for 1‐40 GHz frequencies. As a forth topic, micromachined waveguide switches are presented. Finally, silicon‐micromachined near‐field and far‐field sensor and antenna interfaces are shown, including a micromachined planar lens antenna and a tapered dielectric rod measurement probe for medical applications.