Lightweight, Ultra‐Wideband, and Polarization‐Insensitive Metamaterial Absorber Using a Multilayer Dielectric Structure for C‐ and X‐Band Applications. Issue 10 (8th July 2021)

• Record Type: Journal Article
• Authors: Phan, Duy Tung; Nguyen, Thi Kim Thu; Nguyen, Ngoc Hieu; Le, Dac Tuyen; Bui, Xuan Khuyen; Vu, Dinh Lam; Truong, Chi Lam; Nguyen, Thi Quynh Hoa
• Is Part Of: Physica status solidi. Volume 258:Issue 10(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-07-08
• Subjects: absorbers -- broadband -- C and X bands -- metamaterials -- wide-angle; Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.202100175
• Languages: English
• ISSNs: 0370-1972

Abstract

Abstract : The design of a lightweight and ultra‐wideband absorber for C and X bands is still a challenge as the dimension of the absorber is relatively large in such a relatively low‐frequency band. Herein, an ultra‐wideband and lightweight metamaterial absorber (MMA) is presented for C‐ and X‐band applications. The unit cell of the proposed MMA consists of four copper sectors loaded by lumped resistors and a continuous copper ground plane, which is printed on two FR‐4 substrates. Furthermore, an airgap separating the FR‐4 layers is used as the active substrate medium of the MMA to achieve both ultra‐wideband absorption spectra and lightweight design. The MMA is investigated by simulation and measurement, showing that a good agreement is achieved. The result indicates that the absorptivity of the MMA under both transverse electric (TE) and transverse magnetic (TM) polarizations is greater than 90% in a wide range from 3.7 to 13.6 GHz for all polarization angles. Compared to other reported broadband absorbers, the proposed MMA shows an ultra‐wide absorption bandwidth and a lightweight design, which demonstrates a great potential for C‐and X‐band applications. Abstract : Herein, a lightweight, ultra‐wideband, and polarization‐insensitive metamaterial absorber is designed and fabricated. The designed absorber exhibits absorption response with absorptivity greater than 90% in a wide range from 3.7 to 13.6 GHz and a relative bandwidth of 114.5% for all polarization angles, which entirely covers both the C and X bands.