Christian Fager

The Microwave Electronics Laboratory at Chalmers University of Technology, Sweden, is inviting applications for a postdoctoral researcher position in Integrated Circuits for Full-Duplex Communication and Sensing. This opportunity is part of classIC, the Swedish Multidisciplinary Research Center for Semiconductor System Design, and is supervised by Professor Christian Fager. The research targets advanced challenges in modern RF systems, specifically self-interference mitigation for in-band full-duplex MIMO systems. The focus is on developing novel integrated microwave circuit architectures in the 7–20 GHz range, utilizing RFIC/CMOS and MMIC technologies. The successful candidate will join a highly international and multidisciplinary team, collaborating on the co-design of antennas, RF front-ends, and signal processing. The position offers access to world-class measurement facilities at the Kollberg Laboratory, which supports research from DC up to terahertz frequencies and is renowned for its advanced instrumentation and open research environment. The laboratory's infrastructure enables cutting-edge research in wireless communications, radar sensors, and space exploration, with applications in autonomous vehicles and high-frequency systems. Responsibilities include conducting high-impact research, contributing to publications, supervising PhD students, and shaping future research directions in high-capacity communication and sensing. Applicants should hold a PhD in Electrical Engineering, Microwave Electronics, Integrated Circuits, or a related field, with experience in RFIC/CMOS and MMIC technologies, and knowledge of full-duplex communication and MIMO systems. A strong publication record, teamwork skills, and proficiency in English are required. This is a fully funded postdoctoral position at Chalmers University of Technology. The application deadline is January 31, 2026. For more information and to apply, visit the official Chalmers vacancies page or the provided application link. This position is ideal for candidates interested in integrated circuits, microwave electronics, semiconductor system design, and advanced measurement technology.

Join the Microwave Electronics Laboratory (MEL) at Chalmers University of Technology as a postdoctoral researcher and contribute to cutting-edge research in integrated circuits for full-duplex communication and sensing. MEL is one of the largest divisions within the Department of Microtechnology and Nanoscience, with over 40 researchers working on high-speed electronic components, circuits, and systems for communication, industrial, and remote sensing applications across 1 GHz to 500 GHz and beyond. The laboratory offers state-of-the-art facilities for advanced microwave, millimeter wave, and sub-terahertz measurements. This postdoctoral project focuses on developing novel integrated microwave circuit architectures to address the challenges of in-band full-duplex (IBFD) operation in MIMO systems, particularly the mitigation of self-interference. The research will target the 7–20 GHz frequency range and involve both RFIC/CMOS and MMIC implementations. You will have access to advanced semiconductor technologies and world-class measurement facilities at the Kollberg Laboratory. The project is highly collaborative, involving experts in antennas, RF circuits, and digital signal processing, aiming for co-optimized solutions to maximize full-duplex MIMO performance. As a postdoc, you will conduct independent and collaborative research, lead and co-author scientific publications, participate in joint activities with academic and industrial partners, and contribute to the supervision of PhD and MSc students. The position is full-time for two years, with the possibility of a one-year extension, and requires physical presence in Gothenburg, Sweden. Chalmers offers a dynamic and inclusive work environment, comprehensive employee benefits, and support for international staff, including Swedish language courses. Applicants must have a PhD in electrical engineering, engineering physics, or a related field, with strong expertise in RF/microwave engineering, analog/RFIC design, and/or MMIC design. Experience with circuit simulation and layout tools (e.g., Cadence, ADS, HFSS) and high-frequency measurements is highly valued. Proficiency in English and excellent interpersonal skills are essential. The application deadline is January 31, 2026. For more information, contact Professor Christian Fager or Assistant Professor Gregor Lasser.

Chalmers University of Technology invites applications for a fully funded doctoral student position in Frequency Division Multiplexing Transmitter (FDMTX). This research project aims to revolutionize wireless communication by developing a novel transmitter architecture that enhances energy efficiency and data capacity. The Department of Microtechnology and Nanoscience offers a vibrant, international research environment with access to world-class nanofabrication facilities and a strong focus on quantum technology, nanoscience, photonics, and future electronic systems. The FDMTX project involves splitting wideband signals into multiple narrowband branches and recombining them, enabling more efficient power amplification and flexible spectrum use. The research integrates RF circuit design, signal processing, and system-level analysis, combining theoretical studies with experimental validation. Candidates will have opportunities to collaborate across academia, industry, and society, driving innovation and technical breakthroughs. Applicants must hold a master's degree (or equivalent, such as a 4-year Bachelor’s for non-Swedish education) in Electrical Engineering, Communication Engineering, Engineering Physics, Computer Engineering, or a closely related field, with a strong background in electronic circuit design. Experience in high-frequency circuit design is highly valued. Additional skills in microwave measurements, Artificial Intelligence and Machine Learning methods for microwave circuit design, and digital signal processing will strengthen your application. Strong written and verbal communication skills in English are required. Physical presence in Gothenburg is mandatory throughout the study period, and a valid residence permit must be presented by the start date. The position is fully funded from the start, with a starting salary of 34,550 SEK per month (valid from May 25, 2025). The appointment is fixed-term for four years, with the possibility to teach up to 20% and extend the position to five years. As a doctoral student at Chalmers, you are an employee and enjoy comprehensive benefits, including access to Sweden’s generous parental leave, subsidized day care, free schools, and healthcare. Chalmers is committed to gender balance, equality, and inclusion, offering Swedish language courses for international students. To apply, prepare your application in English and attach all documents as PDF files (maximum 40 MB each). Required documents include your CV, personal letter, a brief introduction and motivation, thesis, and transcripts. Applications must be submitted via the online application form; incomplete applications and those sent by email will not be considered. References will be requested after the interview. The application deadline is May 7th, 2026. For questions, contact Full Professor Christian Fager at christian.fager@chalmers.se. Join Chalmers University of Technology in Gothenburg and contribute to cutting-edge research in wireless communication and transmitter technology.

This fully funded PhD position at Chalmers University of Technology focuses on developing nonlinear power-efficient transmit array architectures. The research addresses limitations in current transmitters regarding bandwidth, energy efficiency, and linearity by exploring innovative approaches at the intersection of antenna design, circuit design, and signal processing. The project leverages antenna mutual coupling for effective amplitude modulation, aiming to overcome traditional challenges and foster sustainable digital transformation. The position is hosted by the Microwave Electronics Laboratory at MC2, providing access to state-of-the-art MMIC foundry processes and world-class measurement infrastructure. You will join a vibrant research environment with five other PhD students working in related areas, offering ample opportunities for collaboration and peer learning. The research involves designing microwave components such as power amplifiers and antenna arrays, as well as developing theoretical models for energy-efficient transmission. The goal is to create a scalable transmitter architecture that utilizes mutual antenna coupling for load modulation, enabling efficient signal creation similar to classical Chireix outphasing but using the antenna aperture as the combining element. Facilities include the Kollberg lab, renowned for its advanced microwave measurement capabilities. The project benefits from collaboration agreements with semiconductor manufacturers, allowing fabrication in CMOS, GaAs, and GaN processes. As a doctoral student, you will pursue both coursework and research, develop scientific concepts, and communicate your findings at international conferences and in high-impact journals. The position typically includes 20% departmental work, mainly teaching duties, and is limited to a maximum of five years. Applicants must hold a master's degree (or a 4-year bachelor's degree for non-Swedish education) in Electrical Engineering, Communication Engineering, Engineering Physics, Computer Engineering, or a related field, with a strong background in electronic circuit design. Proficiency in English, both written and verbal, is required. Experience in integrated and high-frequency circuit design, antennas, wireless communication systems engineering, analog circuit design, advanced courses in microwave circuit design and signal processing, and familiarity with tools such as Cadence Virtuoso, MWO, Keysight ADS, SPICE, Matlab, as well as high-frequency RF and measurement equipment, will strengthen your application. Physical presence throughout the study period and a valid residence permit by the start date are mandatory. Chalmers offers a dynamic and inspiring working environment in Gothenburg, Sweden, with generous employee benefits, including parental leave, subsidized day care, free schools, and healthcare. The university is committed to gender balance, equality, and inclusion, and provides Swedish language courses for international students. The starting salary is 35,725 SEK per month (from May 1, 2026), and the position is fully funded from the outset. To apply, submit your application in English as PDF files via the online application form. Required documents include your CV, personal letter, introduction, motivation, thesis, and transcripts. Incomplete applications and those sent by email will not be considered. References will be requested after the interview. The application deadline is August 16, 2026. For further information, contact Assistant Professor Gregor Lasser (gregor.lasser@chalmers.se), Professor Christian Fager (christian.fager@chalmers.se), Professor Marianna Ivashina (marianna.ivashina@chalmers.se), or Professor Thomas Eriksson (thomase@chalmers.se).

Chalmers University of Technology is advertising a postdoc in Nonlinear Power-Efficient Transmit Array Architecture within the Microwave Electronics Laboratory at MC2 in Gothenburg, Sweden. The project sits at the intersection of antenna design, circuit design, and signal processing . It focuses on developing novel nonlinear multi-antenna transmitters that improve bandwidth, energy efficiency, linearity, frequency performance, and power handling by exploiting antenna mutual coupling as a means of amplitude and load modulation. The work aims to challenge the traditional view of coupling as a drawback and instead use it to create a scalable transmitter architecture inspired by outphasing concepts such as Chireix, with the antenna aperture acting as the combining element. The successful candidate will work in a complementary research team and contribute to the design of microwave components such as power amplifiers and antenna arrays, as well as the theoretical derivation of optimal feeding strategies for the individual amplifiers. The position is hosted at the Department of Microtechnology and Nanoscience, with access to advanced microwave measurement facilities at the Kollberg lab and to a strong research environment at MC2, which includes collaboration with Swedish and international partners and a large micro- and nanofabrication cleanroom. The project is supported by collaboration agreements with semiconductor manufacturers, enabling fabrication in CMOS, GaAs, and GaN processes. The role includes independent research, publishing results, co-supervision of PhD students, and preparation of reports for funding agencies. Applicants must hold a doctoral degree in Electrical Engineering, Communication Engineering, Applied Physics, or an equivalent field. Teaching experience and strong research potential are expected. Background in wireless systems, analog circuit design, microwave circuit design, and signal processing will strengthen the application. This is a full-time temporary postdoc appointment for two years , with the possibility of a one-year extension. Physical presence is required throughout the appointment, and a valid residence permit must be shown by the start date if applicable. The deadline for applications is 2026-08-16 . Applications must be submitted in English via the online application system and include a CV, publication list, teaching experience, and a personal letter describing research background and future goals.