RF Design Engineer (Doherty Power Amplifier Specialist)-Dallas, TX

Sumitomo Electric Device Innovations U.S.A., Inc.; United States; On-site; USD 160,000 - 170,000; Full time

Job summary

Sumitomo Electric Device Innovations USA, Inc. in Dallas, TX is seeking an experienced RF Design Engineer to design and optimize Doherty Power Amplifiers for advanced wireless applications.

The role focuses on development, testing, and validation of high-performance RF power amplifier solutions in our lab. You will work with ADS/AWR HFSS/CST, develop schematics, select components, review PCB layouts, and analyze performance metrics such as efficiency, gain, ACLR, EVM, and thermal behavior.

Qualifications

• Bachelor's degree in electrical engineering, RF engineering or related field.
• 5+ years hands-on RF design experience, including power amplifier development.
• Demonstrated expertise designing and optimizing Doherty Power Amplifiers for commercial wireless applications.
• Strong understanding of RF fundamentals including impedance matching, stability analysis, nonlinear device characterization and RF system performance metrics.
• Experience with RF simulation and modeling tools such as ADS, AWR Microwave Office, HFSS, CST, or similar.
• Proficiency in RF measurement techniques and laboratory testing utilizing LabVIEW, MATLAB or equivalent.
• Knowledge of PCB design principles for RF and high-frequency circuits.
• Experience designing power amplifiers for 4G LTE, 5G NR, ORAN, or other wireless infrastructure applications.
• Familiarity with digital predistortion (DPD) and crest factor reduction (CFR) techniques.
• Experience with GaN, LDMOS, or advanced RF semiconductor technologies.
• Knowledge of multi-band, wideband and high-power RF amplifier designs.
• Experience supporting products through manufacturing and volume production.
• Familiarity with EM simulation and RF packaging considerations.
• Ability to work on-site at our Dallas, TX engineering laboratory, including hands-on testing, tuning, troubleshooting and validation of RF hardware prototypes.

Responsibilities

• Design and develop RF and microwave power amplifier circuits for wireless communication systems.
• Lead the architecture, design, optimization and validation of Doherty Power Amplifiers operating across various frequency bands.
• Conduct RF simulations using industry-standard EDA tools such as ADS, AWR Microwave Office, HFSS, CST or equivalent.
• Develop schematic designs, perform component selection and support PCB layout reviews.
• Analyze and optimize amplifier performance including efficiency, gain, linearity, ACLR, EVM, PAE and thermal characteristics.
• Support prototype development, debugging, tuning and verification in laboratory environments.
• Utilize RF test equipment including vector network analyzers, spectrum analyzers, signal generators, power meters and oscilloscopes.
• Collaborate with cross-functional teams to define system requirements and ensure successful product integration.
• Document design methodologies, test results and engineering specifications.
• Support product transition from development through production and manufacturing validation.

Skills

RF Design

Doherty PAs

RF Simulation

Impedance Matching

LabVIEW

MATLAB

PCB Design

Troubleshooting

4G/5G Knowledge

Communication

Education

Bachelor's degree in Electrical Engineering

Tools

ADS

AWR Microwave Office

HFSS

CST

Job description

Position Summary

Sumitomo Electric Device Innovations is seeking a highly skilled RF Design Engineer to join the team at our Dallas, TX Lab. The ideal candidate will have extensive hands‑on experience designing and optimizing Doherty Power Amplifiers (DPAs) for advanced wireless communication applications. This role will focus on the development, testing, and validation of high‑performance RF power amplifier solutions, working closely with cross‑functional teams in a collaborative lab‑based environment.

Essential Duties and Responsibilities

• Design and develop RF and microwave power amplifier circuits for wireless communication systems.
• Lead the architecture, design, optimization and validation of Doherty Power Amplifiers operating across various frequency bands.
• Conduct RF simulations using industry‑standard EDA tools such as ADS, AWR Microwave Office, HFSS, CST or equivalent.
• Develop schematic designs, perform component selection and support PCB layout reviews.
• Analyze and optimize amplifier performance including efficiency, gain, linearity, ACLR, EVM, PAE and thermal characteristics.
• Support prototype development, debugging, tuning and verification in laboratory environments.
• Utilize RF test equipment including vector network analyzers, spectrum analyzers, signal generators, power meters and oscilloscopes.
• Collaborate with cross‑functional teams to define system requirements and ensure successful product integration.
• Document design methodologies, test results and engineering specifications.
• Support product transition from development through production and manufacturing validation.

Required Qualifications

• Bachelor’s degree in electrical engineering, RF Engineering or a related field.
• 5+ years of hands‑on RF design experience, including power amplifier development.
• Demonstrated expertise designing and optimizing Doherty Power Amplifiers for commercial wireless applications.
• Strong understanding of RF fundamentals including impedance matching, stability analysis, nonlinear device characterization and RF system performance metrics.
• Experience with RF simulation and modeling tools such as ADS, AWR Microwave Office, HFSS, CST, or similar.
• Proficiency in RF measurement techniques and laboratory testing utilizing LabVIEW, MATLAB or equivalent.
• Knowledge of PCB design principles for RF and high‑frequency circuits.
• Strong troubleshooting, analytical and problem‑solving skills.
• Excellent written and verbal communication skills.
• Experience designing power amplifiers for 4G LTE, 5G NR, ORAN, or other wireless infrastructure applications.
• Familiarity with digital predistortion (DPD) and crest factor reduction (CFR) techniques.
• Experience with GaN, LDMOS, or advanced RF semiconductor technologies.
• Knowledge of multi‑band, wideband and high‑power RF amplifier designs.
• Experience supporting products through manufacturing and volume production.
• Familiarity with EM simulation and RF packaging considerations.
• Ability to work on‑site at our Dallas, TX engineering laboratory, including hands‑on testing, tuning, troubleshooting and validation of RF hardware prototypes.

The base salary range for this position is $160,000-$170,000/annually.

Compensation may vary depending on a number of factors, including a candidate’s experience, qualifications, skills, competencies and location. Base pay is one part of the total compensation and benefits package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives. Sumitomo Electric Device Innovations offers a comprehensive benefits package designed to support professional growth, personal wellness and financial security.

About Sumitomo Electric Device Innovations, USA

Sumitomo Electric Device Innovations USA, Inc., (SEDU), a Sumitomo Electric Group company, is a leading provider of compound semiconductor Laser and RF component solutions. Our optical components serve the datacom, hyperscale, telecom and broadband communications markets. SEDU also provides a comprehensive line of high‑power RF component solutions. SEDU focuses on the Americas market, while drawing on the well‑established global presence of Sumitomo to achieve integrated support to customer facilities throughout the world. Visit https://sei-device.com/ for more information.

About Sumitomo Electric Group

Sumitomo Electric Industries Ltd. is a recognized global technology leader with over 280,000 employees working at around 400 group companies in 40 countries. Building on more than 120 years of innovation, today Sumitomo Electric is engaged in diversified business activities that support people’s daily lives and industries in five business segments: automotive, infocommunications, electronics, environment & energy and industrial materials.

To learn more about Sumitomo Electric, please visit https://sumitomoelectric.com