RF Systems Verification Engineer

RF Systems Verification EngineerJob#: 3047064Job Description:RF System Test, Characterization & Architecture Verification Engineer (PA + LNA + Array)Location: San Diego, CARole SummaryMeasure and characterize RF components (PA, LNA) and phased array performance to verify the front-end architecture. Build automated test infrastructure using Python/MATLAB to systematically validate that hardware meets architectural specifications across temperature, frequency, and operating conditions.ResponsibilitiesVerify PA performance meets architectural specifications through load-pull and large-signal characterizationVerify LNA performance meets architectural NF/gain/IP3 specifications through noise parameter and gain measurementVerify array-level performance meets architecture predictions through beam measurementDevelop automated test frameworks that enable repeatable architecture verification across builds/lotsCorrelate measured data with architectural simulation models — identify gaps and feed back to architecture teamGenerate measured-data models to update and refine architectural predictionsHardware Knowledge RequiredPA Characterization (Architecture Verification)Load-pull measurement: active/passive, harmonic (2f0, 3f0), source-pull, efficiency contouringVerify PA meets architecture specs: Psat, P1dB, PAE, OIP3, ACLR targetsLarge-signal: AM-AM/AM-PM extraction, gain compression, memory effectsDPD validation: bench-level DPD loop, verify architecture's DPD effectiveness assumptionMulti-temperature: derating curves to validate architectural margin allocationLNA Characterization (Architecture Verification)Noise figure: Y-factor, cold-source (PNA-X), noise parameter extraction (Γopt, Rn, NFmin)Verify LNA meets architecture specs: NF target, gain flatness, IP3, stabilityGain/linearity across frequency and temperatureStability verification: odd-mode, low-frequency stabilityArray-Level VerificationPhased array beam measurement: multi-beam patterns, scan-dependent performanceEIRP/EIS measurement: verify architecture's radiated power and sensitivity targetsBeam quality: sidelobes, null depth, cross-pol — compare to architectural predictionsCalibration verification: validate calibration algorithm performance meets architecture assumptionsNear-field scanning of active phased array panelsTest Fixture & SetupFixture design for bare-die, QFN, BGA, and array-level measurementCalibration: TRL/SOLT/LRM, reference plane definitionThermal integration: chamber + RF bench for multi-temperature architecture verificationSoftware & Coding Skills Required (Critical)Python (PyVISA/SCPI): Full instrument automation — VNA, signal generator, power meter, spectrum analyzer, positioner, tuner controlMATLAB: Data processing, model extraction from measured data, architecture correlation analysisTest Framework Development: Automated architecture verification test suites, parametric sweeps, pass/fail against architectural specsData Pipeline: Measurement processing comparison against architecture predictions reportingGit: Version-controlled test code, CI for measurement scriptsTest Equipment ExpertiseVNA: Keysight PNA-X (multiport, noise figure, pulsed-RF)Load-pull: Maury/Focus automated tuners, active load-pullSignal sources: PSG/MXG, AWG for modulated waveformsSpectrum analyzers: PXA/UXANoise figure: PNA-X noise personality, noise sourcesNF scanner: NSI or MI Technologies for array beam measurementPower meters, thermal chambers, probe stationsNOT Required for This RoleRF circuit design (ADS schematic, AWR) — this is test/verification, not designAntenna element EM simulation (HFSS, CST)PCB layout or signal integrityFPGA/RTL designPackage designManufacturing/NPI process ownershipQualificationsRequiredMS in EE (RF/Microwave)5+ years RF component and/or antenna characterization experienceStrong Python programming — test framework development, not just scriptingExpert VNA operation including calibration and de-embeddingLoad-pull experience with efficiency contour generationNoise figure measurement proficiency (Y-factor and cold-source)Array-level beam measurement experienceMulti-temperature characterizationExperience correlating measurements against design/architecture predictionsPreferredKa-band and/or L/S-band component testingOn-wafer probing and MMIC characterizationDPD bench-loop validationAutomated test framework development (production-level)Experience working with architects to refine specifications based on measured dataDeliverablesPA characterization data verifying architectural PA specificationsLNA noise parameter data verifying architectural NF specificationsArray-level measurement results verifying architectural beam/EIRP/G/T predictionsAutomated architecture verification test framework (Python, version-controlled)Measurement-vs-architecture correlation reports (identifying model gaps)Measured-data models fed back to architectural simulationEverforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.Everforth Apex uses a virtual recruiter as part of the application process. Click here for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. 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