Multi-modal millimeter-wave sensors for plastic polymer material characterization. (18th June 2018)

• Record Type: Journal Article
• Authors: Chudpooti, N; Doychinov, V; Hong, B; Akkaraekthalin, P; Robertson, I; Somjit, N
• Is Part Of: Journal of physics. Volume 51:Number 27(2018)
• Publication Date: 2018-06-18
• Subjects: millimeter-wave -- complementary split ring resonator -- modified transmission-line -- microwave measurements -- complex dielectric properties; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/aac818
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: This paper presents, for the first time, a multimodal sensor for characterizing relative permittivity of plastic polymers by integrating in a single sensor (1) frequency-reconfigurable resonance technique at 98 and 100 GHz, and (2) 80–100 GHz broadband modified transmission-line technique. The sensor is designed based on a custom-made WR-10 waveguide featuring dual rectangular complementary split-ring resonators (CSRRs). By loading the CSRRs with a material-under-test (MUT), the reflected and transmitted electromagnetic waves propagating inside the waveguide are changed depending on the dielectric properties of the material. Various plastic polymer materials, e.g. polytetrafluoroethylene (PTFE), polymethylmethacrylate (PMMA) and high-density polyethylene (HDPE), are characterized. The sensor in this paper offers various key advantages over any state-of-the-art material characterization techniques at millimeter-wave frequencies, e.g. multiple characterization techniques integrated in a single device, miniaturization, much higher tolerance to changes in the measurement environment, ease of design and fabrication, and better cost effectiveness.