Radiofrequenztechnik Jobs

I need a custom single/multiple-turn loop antenna designed and working physical prototype fabricated. The target band is low frequency (LF), and the antenna will be used exclusively for near-field coupling applications. What I’m expecting from you is a complete, start-to-finish service: H-field antenna designed according to specified, fixed dimensions, selection of suitable conductor and core materials (as well as tuning capacitors or ferrite sheets if required), then the actual fabrication of a working custom prototype that I can test using my own setup. Deliverables • Simulation files (HFSS, CST, or similar) showing impedance, Q-factor and coupling coefficient at the target LF band • Manufacturing drawings or Gerber files if a PCB-based loop is the better approach ...

I need a full electromagnetic design for a dielectric lens – or a compact horn‑lens combination – that concentrates microwave energy at 2.45 GHz from an existing 1 kW source in a controlled lab/industrial setting. The goal is to maximise the energy delivered to a small focal spot (target ≈ 2–3 cm at a defined distance), so the work must revolve around: Directivity Gain High power‑density focusing at the target spot Please model, optimise and document the antenna‑lens using a recognised 3‑D EM solver such as CST Studio Suite, HFSS, FEKO or similar. I will rely on your simulations to validate return loss, beam pattern, peak gain and the size of the focal region before we commit to fabrication. Deliverables Native simulation project files and exported 3‑D geometr...