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Item type:Publication, Access status: without files , Design of a microwave frontend for a trapped ion quantum computer(IEEE, 2025-03); ; ; ; Unlike classical computers, which represent information as binary '1' and '0', quantum computers use qubits that exist in a superposition of both, enabling parallel computation. This capability allows them to solve special kinds of problems faster than classical computers. To process information, qubits are manipulated by applying energy, such as via a microwave signal, which is provided by a microwave frontend that ensures an appropriate frequency spectrum and power level. This paper defines the key parameters and implements such a frontend for trapped ion quantum computers which follow the magnetic gradient induced coupling (MAGIC) principle. The frontend is manufactured on a printed circuit board and measurements prove its functionality. It achieves an idle gate fidelity of 99.9% (99.99%) at an output power of 6.32 dBm (2.4 dBm).Publicationtype: Conference Paper80 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , 3D-printed surface-mounted waveguide technologyThis contribution focuses on the 3D-printed surface-mounted waveguide (SM-WG) technology. In this concept, a printed circuit board (PCB) is combined with a 3D-printed metallized structure, complementing it to an on-PCB air-filled rectangular waveguide. For this, a nonradiative transition between a grounded coplanar waveguide (GCPW) and an SM-WG is developed, which serves as basis to feed SM-WG components. To connect the PCB with the SM-WG structure, a systematic assembly process based on a silver conductive epoxy adhesive is proposed. The concept is validated by a K-band quadrature hybrid Riblet-type coupler, which is designed, manufactured, and measured.Publicationtype: Conference Paper52