Reconfigurable intelligent surface design using PIN diodes via rotation technique -Proof of concept

Samara Gharbieh (1) , Raffaele D Errico (1) , Antonio Clemente (1)

1 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information

In this paper, we present the design of a reconfigurable intelligent surface (RIS) operating in the Kaband (27 – 31GHz). The considered RIS operates in reflection mode; thus, it is a reflectarray antenna. The reflectarray unit cell has a relatively simple structure with four metal layers and two Isola Astra MT77 substrates. In order to achieve the electronic phase control of the unit cell, two p-i-n diodes were integrated on the reflecting patch. The alternation of the diodes states will create a rotation in the current distribution on the top of the reflecting patch, and thus a 1-bit phase shift resolution is obtained. The unit cell performances present 1.5 dB losses over the studied band (14% of relative bandwidth). The phase difference between the two unit cell states is 180° at the central frequency with acceptable phase errors over the frequency band. The designed unit cell is then used in the synthesis of reflectarray antennas. For this purpose, an in-house synthesis tool is developed to optimize the reflectarray analytically. Furthermore, an 8×8 elements reflectarray is designed using the aforementioned tool, and its theoretical results are compared to a full-wave simulation.

Mots clés: Reconfigurable intelligent surface; reflectaray; 1-bit phase resolution; electronically beamforming; beam scanning

Domaines: Electromagnétisme

Samara Gharbieh, Raffaele D Errico, Antonio Clemente. Reconfigurable intelligent surface design using PIN diodes via rotation technique -Proof of concept. EuCAP 2023 - 17th European Conference on Antennas and Propagation, Mar 2023, Florence, Italy. ⟨cea-04006363⟩