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Location: Bengaluru
Company: Koch
What You Will Do
3D EM Simulation & Modeling
- Full-Wave Modelling: Assist in creating high-fidelity 3D models of connectors and cable terminations using Ansys HFSS or CST Studio Suite.
- Virtual Prototyping: Run simulations to extract S-parameters and identify impedance discontinuities within the connector pin-field and mating interface.
- Optimization: Perform “what-if” analyses on mechanical variables (e.g., pin geometry, plastic dielectric constants, shield spacing) to optimize return loss and crosstalk.
Lab Validation & Characterisation
- High-Frequency Measurement: Use Vector Network Analysers (VNA) and Time Domain Reflectometers (TDR) to characterize physical prototypes up to 20 GHz or higher.
- Fixture De-embedding: Learn and apply de-embedding techniques (like AFR or TRL) to remove the effects of test boards, isolating the performance of the connector itself.
- Correlation: Compare lab measurement data against simulation models to validate accuracy and refine simulation methodologies.
Crosstalk Simulation & Discovery (Pre-Silicon/Pre-Layout)
- Aggressor-Victim Analysis: Use Ansys HFSS to perform “discovery” simulations identifying the most significant crosstalk contributors within a high-density pin array.
- NEXT/FEXT Modeling: Extract Near-End Crosstalk (NEXT) and Far-End Crosstalk (FEXT) S-parameters to determine the isolation levels between differential pairs.
- ICN Calculation: Calculate Integrated Crosstalk Noise (ICN) and Power Sum Crosstalk to evaluate total noise interference against IEEE 802.3 or OIF-CEI limit lines.
- Pin-Map Optimisation: Based on crosstalk discovery, provide recommendations for optimised signal-to-ground ratios and pin-mapping (e.g., G-S-S-G patterns) to shield sensitive high-speed lines.
Crosstalk Validation (Lab/Post-Layout)
- Multi-Port Measurements: Utilise 4-port or 8-port Vector Network Analysers (VNAs) to measure real-world crosstalk in physical prototypes and connector mating interfaces.
- Time Domain Analysis: Use TDR/TDT to locate the exact physical location of a crosstalk “hotspot” within a connector body or cable transition.
- Correlation: Document discrepancies between simulated crosstalk and measured crosstalk, investigating factors such as manufacturing tolerances in pin-to-pin spacing or plating consistency.
Data Analysis & Automation
- Scripting: Utilise Python or MATLAB to automate the processing of large Touchstone sNp file datasets.
- Compliance Testing: Analyse simulation and test results against industry standards such as IEEE 802.3 (Ethernet), USB4, or USCAR-2 specifications.
Documentation & Collaboration
- Technical Reports: Prepare professional SI reports summarising performance vs. specifications for internal design reviews.
- Cross-Functional Support: Interface with Mechanical Engineers to explain how physical design changes impact electrical performance.
Who You Are (Basic Qualifications)
- B.E/B.Tech in Electronics/Electrical Engineering, or pursuing a M.S. or Ph.D. in Electrical Engineering or Physics with coursework focused in Electromagnetics, Microwave Engineering, or Circuit Theory.
- 2-5 Years experience in Signal Integrity using Ansys HFSS or CST.
- Strong desire to understand the “why” behind signal degradation.
- Ability to translate complex EM concepts into actionable design advice for mechanical teams.
What Will Put You Ahead
- Understanding of transmission line theory, characteristic impedance and S-parameters.
- Exposure to Ansys HFSS, ADS, or Cadence Sigrity.
- Basic proficiency in programming such as Python (NumPy, Pandas, Matplotlib) or MATLAB.
- Basic experience with oscilloscopes or VNAs is a significant plus.
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