Potentialities of Air-Filled Substrate Integrated Waveguides based on Carbon Nanotubes in E-band 1

Phi Long Doan (1) , Emmanuel Pistono (1) , Philippe Coquet (2) , Jianxiong Wang (2) , Florence Podevin (1) , Dominique Baillargeat (3) , Joseph de Saxcé (3) , Stéphane Bila (3)

1 RFIC-Lab - Laboratoire de Radio-Fréquence et d'Intégration de Circuits
2 UMI CINTRA - CNRS International NTU THALES Research Alliance
3 XLIM-SRF - Systèmes RF

This paper describes a classic architecture of a 4 × 4 Butler matrix in an innovative air-filled waveguide technology based on carbon nanotubes for beam pointing or beam tracking activities for 5G applications. The working frequencies concern particularly the E-band (71-86 GHz). The model used to simulate the waveguides, couplers and crossovers needed for the Butler matrix is presented as well as the expected results in terms of S parameters. The expected insertion loss is extremely low thanks to the considered technology, 0.02 dB/mm in E-band, making the carbon nanotubes very attractive in this context. The transitions that allow connecting the waveguides to planar transmission lines have also been developed and are introduced in this paper. Their maximum insertion losses are 0.6 dB for a matching better than 17 dB over the entire E-band.

Mots clés: Air-filled substrate integrated waveguide; carbon nanotube; Butler matrix; E-band; 5G application

Domaines: Sciences de l'ingénieur [physics]; Electronique

Phi Long Doan, Emmanuel Pistono, Philippe Coquet, Jianxiong Wang, Florence Podevin, et al.. Potentialities of Air-Filled Substrate Integrated Waveguides based on Carbon Nanotubes in E-band 1. IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM 2020), Apr 2020, Linz (en virtuel), Austria. ⟨hal-03047743⟩