Antenna Arrays in Waferscale Si-interposer Technology for 140 and 300 GHz Wireless Systems

Waferscale Si-interposer technology is a well-established interconnect solution for digital systems like microprocessors, high bandwidth memory and chip-to-chip communication. With the next generation of wireless communication and radar systems moving to beyond 100 GHz, there is tremendous interest to explore if the solutions developed for digital systems can be leveraged to realize (sub-)terahertz systems.

At such high frequencies, power gain of electronic components is low, while traditional antenna and RF interconnect solutions based on PCBs incur excessively high loss and signal leakage. Therefore, a holistic system-oriented approach that combines miniaturized semiconductor fabrication with innovative antenna design is essential to pave the way for next-generation multi-antenna solutions, reconciling highly efficient operation with mass manufacturability.

In this PhD, you will explore planar antenna arrays at both the 140 and 300 GHz band. IMEC has developed a heterogeneous integration platform based on Si-interposer technology on which various RF components and ICs can be integrated. Your task will be to combine high-frequency low-loss antenna substrates with the RF optimized Si-interposer. Several challenges, such as low-loss broadband antenna-to-ic interconnects, compact and high bandwidth antenna elements, dual polarization support, and scalability to larger arrays will be explored. During your PhD, you will also need to carry out an in-depth literature review to keep yourself updated with the most recent developments, to spot opportunities that arise, and to benchmark your own work.

You will also have access to IMEC’s world class R&D fab to realize your designs as well as tweak the underlying technology parameters. This is a unique opportunity, typically not available to antenna researchers at university departments not having access to advanced semiconductor fabs. Moreover, you will be trained to use our state-of-the-art measurement facilities, capable of performing Vector Network Analyzer, antenna and system measurements, which is essential to fully characterize your designs.