Senior SI Engineer - High-Speed Data Center Interconnects

Amphenol Communications Solutions; Yocumtown (PA); On-site; USD 120,000 - 180,000; Full time

Job summary

Amphenol Communications Solutions in Valley Green, PA is seeking a Senior Signal Integrity Engineer to design, characterize, and qualify high-speed RF coaxial and twinaxial cable assemblies for data center interconnects up to 224G/448G PAM4. The role blends hands-on measurements with simulations and cross-functional collaboration.

You'll use VNA, TDR, BERT, and 3D EM tools such as HFSS or CST, drive root-cause analysis, and contribute to qualification plans.

Qualifications

• BS or MS in Electrical/Electronics Engineering or related field.
• 3+ years in signal integrity, RF/microwave, or high-speed interconnect design.
• Hands-on experience with VNA, TDR/TDT, and BERT test equipment.
• Strong understanding of transmission line theory, impedance matching, and high-speed channel design (112G/224G NRZ/PAM4).
• Proficiency with S-parameter analysis tools and EM simulation software (HFSS, ADS).
• Working knowledge of Python or MATLAB for data analysis and automation.
• Familiarity with cable/connector construction and manufacturing processes.

Responsibilities

• Perform S-parameter measurements (VNA) and time-domain reflectometry (TDR) on coax and twinax cable assemblies to characterize insertion loss, return loss, crosstalk, and impedance discontinuities.
• Conduct BERT-based bit error rate testing and eye-diagram analysis to validate signal integrity margins across cable/connector interfaces.
• Support 3D EM simulation (HFSS, CST, or similar) of cable terminations, connector interfaces, and cartridge assemblies to correlate simulated vs. measured performance.
• Drive root-cause analysis on SI failures (e.g., echo/reflection issues, lane failures, mechanical-to-electrical correlation) and recommend design or process corrective actions.
• Collaborate with mechanical and manufacturing engineering on cable construction, termination geometry, connector mating interfaces, and material selection (dielectrics, shielding, lubrication) as they affect electrical performance.
• Support qualification test plans and re-qualification workflows, including differential pair testing, leg-line S-parameter rechecks, and reliability correlation studies (e.g., Tlife testing).
• Develop and maintain test fixtures, automation scripts, and data analysis pipelines (Python/MATLAB) for high-throughput characterization.
• Present findings and design recommendations to internal stakeholders and customers, including executive-level summaries of qualification status and risk.
• Stay current with industry standards (IEEE 802.3, OIF-CEI) and channel modeling methodologies for next-gen data rates.

Skills

Signal integrity

High-speed interconnect design

RF/microwave engineering

S-parameter analysis

EM simulation

Python

MATLAB

Cable/connector construction

Education

B.S./M.S. in Electrical Engineering or related

Tools

VNA

TDR/TDT

BERT

HFSS

ADS

Job description

Amphenol Communications Solutions in Valley Green, PA is seeking a Senior Signal Integrity Engineer to design, characterize, and qualify high-speed RF coaxial and twinaxial cable assemblies for data center interconnects up to 224G/448G PAM4. The role blends hands-on measurements with simulations and cross-functional collaboration.

You'll use VNA, TDR, BERT, and 3D EM tools such as HFSS or CST, drive root-cause analysis, and contribute to qualification plans.