Master Thesis, Radio link MINI-LINK

Job Description

Date: Jul 17, 2019

Why is Ericsson a good place to work?

Ericsson enables communications service providers to capture the full value of connectivity. The company’s portfolio spans Networks, Digital Services, Managed Services, and Emerging Business and is designed to help our customers go digital, increase efficiency, find new revenue streams, and create new user experiences. Ericsson’s investments in innovation have delivered the benefits of telephony and mobile broadband to billions of people around the world ensuring our solutions – and our customers – are at the forefront of innovation.   We support networks that connect more than 2.5 billion subscribers. With close to 100,000 employees and customers in 180 countries, we combine global scale with technology and service leadership.  40 percent of the world’s mobile traffic is carried over an Ericsson network.  And, our Technology for Good and Connect to Learn programs include creating technology that makes it easier to save lives, feed societies, bring technology to emerging markets and connectivity to remote areas, and grow businesses and prosperity.


At Ericsson, we give our employees the freedom to think big and navigate their career, on a global scale.  We create technology that helps others, from helping people enjoy their favorite content to helping people recover from natural disasters by enabling better communications between rescue workers. Your ideas and innovations can turn into achievements that impact society and change the world, creating new connections, new possibilities, and new capabilities.  We find that Ericsson is at its best when we bring together the diverse skills of our people. Working across business areas, across cultures, across geographical borders, across technical disciplines. Often, across ground-breaking solutions. Next generation technology can be staggeringly complex. But the simpler it is to use; the more people benefit from it. Join us and help build technology that makes it simple to connect with information, business, societies, and each other.



Business Area Networks: where 5G was born! We’re a global team of approx. 26 000 in 93 countries, with 126 nationalities represented. About half of us work in R&D, approx. 6 000 in Group Supply and 5 000 in Service Area Networks. Together we create future-proof, scalable network architectures in an industry that is constantly on the move. Our approach is simple: we build solutions that empower our customers to meet tomorrow’s demands. 5G is happening now, with the first commercial launches implemented today


About the role:

We are now looking for an ambitious master thesis student who wants to explore and come up with wideband directional coupler designs that is manufacturing process tolerant, i.e. the process variations have low impact on insertion loss and directivity. In the context of the point-to-point radio link MINI-LINK, the ambition is to have as few variants of directional couplers as possible covering the frequency band 6-42 GHz.

In low frequency designs, it is feasible to use discrete solutions for a directional coupler. At microwave and millimeter wave frequencies, printed solutions on a printed circuit board, PCB, are more attractive due to cost benefits and performance. However, this requires an intelligent design and trade-off between different design parameters such as bandwidth, insertion loss, directivity and process tolerance.

Today several topologies how to design a directional coupler in a system to cover a narrow band implementation exists. To meet up with wideband designs at circuit level there is a need of ultra wideband directional couplers.


The purpose of the thesis is to develop ultra wideband directional couplers in the frequency band 6-42GHz using the simulation tools HFSS/ADS.
•Investigate different topologies of directional couplers.
•Investigate usage of PCB structures/layers to increase bandwidth of the design
•Verify designs in HFSS/ADS.
•Design PCBs with test structures to enable comparison of simulation results and measurements.
•Perform laboratory measurements for a sample set of components.


Key Qualifications:
•Master of science program student in electronics with knowledge in microwave circuit design.
•Knowledge in ADS and HFSS environment would be an asset but is not a strict requirement.
•You are flexible and available during the period with us.
•You are a driven and self-employed person who can structure your own work.


The position is based in Göteborg at Lindholmen and the selection and interview process is ongoing. Therefore, send in your application as soon as possible. Regaring questions about the position, please contact recruiter Magdalena Bielaszka <>



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Primary country and city: Sweden (SE) || || Göteborg || IT

Req ID: 286922