EMC Simulation

Project Description

We are looking for an RF simulation expert to remotely perform EMC/EMI analysis and antenna coexistence simulation for a compact IoT device integrating multiple radios (e.g., Wi-Fi 2.4/5 GHz, Bluetooth, and GPS).

The device is under development, and the goal of this project is to simulate and verify inter-antenna isolation, radiated spurious emissions, and coupling effects, especially within a tight enclosure. This study will help the hardware team prepare for CE/FCC compliance and improve real-world multi-radio performance.

This is a simulation & documentation project only — no physical measurements or hardware needed.

Objectives:

• Import or create a basic model of the IoT enclosure (plastic or ABS shell)
  Simulate the placement and interaction of 2–3 antennas:
  • Wi-Fi/Bluetooth combo antenna
  • Active GPS patch antenna
  • Optional: LTE or Sub-GHz LPWAN antenna
•  Analyze:
  • Mutual coupling and S-parameter matrix (S21 between antennas)
  • Isolation ≥15 dB between bands (target)
  • EMC risks: radiation from unintentional emissions in-band/out-of-band
  • Identify critical areas for shielding or spacing improvements
•  Recommend layout optimizations to reduce interference and improve isolation

Deliverables:

• Simulation files (HFSS, CST, FEKO, or similar)
• Multi-port S-parameter results (S11, S21, S31…)
• 3D radiation maps for each antenna
• EMI “hot spot” visuals if applicable
• Short technical report (3–6 pages) including:
  • Summary of coupling effects
  • Isolation vs frequency plots
  • Suggestions for layout/shielding/tuning
  • Optional: PCB placement guideline or design constraints

Recommended Tools:

• CST Microwave Studio
• Ansys HFSS with EMC module
• Altair FEKO

Timeline: 2–3 weeks total

How to Apply:

Please include:

• Simulation tools you use
• Example of a similar interference/coexistence study (image or excerpt)
• Delivery estimate and price
• Suggestions for other risk factors to simulate (e.g., power plane noise, enclosure resonance)