Radio HW Design Power Amplifier

Ericsson is opening a state-of-the-art R&D center in Yokohama focused on Radio and Software development. This new hub will support leading Japanese CSPs, partner with local vendors and deliver Japan-driven products and solutions that shape networks worldwide. We are establishing and growing the team and building advanced laboratory and office facilities. We are now looking for a passionate and driven Intermediate- or Senior Power Amplifier (PA) Designer to join our growing team. We are developing PAs for Ericsson future Radio Systems. We are working on all horizons: Research, pre-development, product development as well as after-market. The amplifiers cover all applicable power levels and frequencies used for mobile narrow band and broadband applications. You will be part of a highly diverse team with varied strengths and contribute in all kinds of activities that come with this role.

Responsibilities

Define PA concepts and architectures to meet power, bandwidth, efficiency and linearity targets within a given form factor and supply constraints; Conduct product-relevant simulations, schematic or drawing designs, testing, and performance analysis to drive continuous product improvement; Collaborate with other functional areas like e.g., TRX, digital design, power design and system engineers to integrate the PA into the full TX chain; Work closely together with SW/DPD, verification, reliability, and production teams across multiple sites to deliver high-performing, reliable radio products; Collaborate closely with external vendors and operators to meet performance, reliability and manufacturability targets; Work hands-on in the lab with top-of-the-line instrumentation to characterize prototypes and optimize the designs; Create and maintain HW specifications, design notes, databases, and provide inputs to radio architecture documents; Share knowledge and mentor junior engineers

Requirements

A university degree: MS in electronics or engineering physics or a PhD in a PA-related subject; You have been working with power amplifiers for several years and have an in-depth understanding of Power Amplifier (PA) modes, topologies, and architectures; Hands-on experience with transistor technologies (e.g., LDMOS, GaN), collaboration with multiple semiconductor device vendors and design for volume production; Practical experience with digital predistortion (DPD) and other PA linearization techniques; You can discuss on equal terms with a transistor vendor, a mobile infrastructure vendor, a university or a research institute; You are skilled in ADS and/or AWR; Proficiency in RF measurement techniques and hands-on use of RF laboratory equipment; Strong troubleshooting skills with a structured and practical approach to problem solving; Good programming and scripting skills to support design, analysis, and verification activities; Knowledge of relevant radio and wireless standards and regulatory requirements (3GPP, ETSI, CE, FCC, Telec); Familiarity with 3GPP specifications, such as LTE and NR, including verification and validation needs during product development; Understanding of radio product lifecycle, from concept and design to verification and production support; You are curious, self-driven, and motivated to continuously learn and grow within radio and PA product development; You have a solution-oriented mindset with the ability to innovate and drive technical improvements; You show strong collaboration and communication skills, enabling effective interaction with development, system, and product engineering teams; You are team-oriented with a clear focus on collective success and knowledge sharing; You feel comfortable working in lean and agile development environments and contribute pro-actively to continuous improvements; You are result-driven with a service-minded and quality-focused approach; You can work effectively in English

Nice to have

Having experience in HFSS or other simulation tools; Familiarity with load-pull equipment; Capability to collaborate in Japanese

Benefits

A central role in the establishment and growth of a new R&D center in Yokohama, with labs and offices designed for cutting-edge radio development; Opportunities to work on products that shape national and global digital infrastructure; A culture that values innovation, collaboration, and speaking up — many career directions and internal mobility; Working with people of different nationalities and cultures and building up a broad global network; Becoming a part of a highly diverse team with varied strengths and taking part in all kinds of activities that come with this role; Support for professional growth, knowledge exchange, and mentoring; Competitive benefits and professional development opportunities; Collaborative environment with close ties to local vendors and operators; Clear career paths from individual contributor to technical leadership or management; Flexible working arrangements and inclusive R&D culture