Conception d'antennes 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...

PROJECT SUMMARY: I need an experienced RF/NFC hardware engineer to design a compact, modular 4×4 NFC sensor array board. The board will be used to detect and identify NFC-tagged objects placed on a flat surface (e.g., industrial tray, logistics sorting grid, or interactive tabletop application). Multiple boards (up to 6) will be tiled together to cover larger surfaces. Each board must detect and report the UID of ISO 14443 and ISO 15693 NFC tags placed on any of its 16 positions, within 500ms scan time for the full array. This is not a greenfield project. I have an existing but non-functional 6-layer PCB design (EasyEDA source files available) that attempted this with an ST25R3916B, STM32L476, analog multiplexers, P-MOSFETs, and PIN diodes simultaneously. The design is overenginee...

PCB Design Requirement Project: BLE to Wi-Fi/Ethernet Gateway Device. The objective of this project is to design a BLE to Cloud Gateway device that integrates: - Nordic nRF52840 (BLE receiver) - HLK7628N Wi-Fi / Ethernet Linux module The device continuously receives BLE packets, forwards them to the HLK7628N through USB, and uploads the data to the cloud over Wi-Fi or Ethernet. When internet connectivity is lost, incoming data will be stored locally on an SD card using a rotational buffer mechanism, and synchronized automatically once connectivity is restored. The design must follow best practices for RF layout, impedance control, EMI mitigation, and grounding, enabling FCC and CE certification. The HLK7628N module and nRF52840 chip are fixed components and must remain in the desig...