A Varactor-Based Reconfigurable Intelligent Surface Concept for 5G/6G mm-Wave Applications
Paper i proceeding, 2024

A varactor-based reconfigurable intelligent surface (RIS) concept is presented for low-cost, high-precision beamforming of 5G/6G mm-waves. To enable this, we maximize the RIS unit cell (UC) phase coverage by (i) employing a varactor diode-tuned slotted-patch UC, and (ii) adding a metallic loop and via fence across the UC boundary, which also improves the bandwidth and angular insensitivity. In an infinite RIS environment, the UC exhibits a phase coverage of 330.7 degrees while maintaining the insensitivity of reflection coefficients up to 50-degree elevation angle. This UC design demonstrates a phase coverage that exceeds 315 degrees with under 0.7-dB reflection loss across a 11.6% bandwidth, where the capacitance tuning ratio of the considered commercial off-the-shelf varactor diode is only 1.8. A 15 × 15 RIS model with a 3-bit phase quantization is used for beam steering performance validation; it predicts the realized gain of 19.5 dBi for the 30-degree beam-steering direction at 28 GHz.

3-bit phase quantization

varactor diode

5G/6G mm-wave

reconfigurable intelligent surface

Författare

Yuqing Zhu

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Artem Vilenskiy

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Oleg Iupikov

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Pavlo Krasov

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Thomas Emanuelsson

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Ericsson AB

Gregor Lasser

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Marianna Ivashina

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

18th European Conference on Antennas and Propagation, EuCAP 2024


9788831299091 (ISBN)

18th European Conference on Antennas and Propagation, EuCAP 2024
Glasgow, United Kingdom,

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

Kommunikationssystem

Signalbehandling

DOI

10.23919/EuCAP60739.2024.10501072

Mer information

Senast uppdaterat

2024-09-27