Reconfigurable miniaturized UWB multiple‐input‐multiple‐output antenna system design and study using characteristics mode analysis. Issue 9 (17th June 2022)

• Record Type: Journal Article
• Authors: Mohanty, Asutosh; Behera, Bikash Ranjan; Nasimuddin, Nasimuddin
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 32:Issue 9(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-17
• Subjects: characteristics mode analysis -- multiple‐input‐multiple‐output -- reconfigurable antenna -- UWB antenna; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.23287
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: In this article, a miniaturized reconfigurable 4‐element ultra‐wideband (UWB) multiple‐input‐multiple‐output (MIMO) antenna is proposed to operate from 2.52 to 24 GHz, and studied using characteristics mode analysis (CMA). Initially, a 1‐element antenna is designed and then extended to 4‐element MIMO configuration. The MIMO antenna achieves design merits by orthogonally sorting fractal radiators for miniaturization, a Γ‐shaped slot for band‐notching and rotationally symmetric connected ground for isolation. CMA is explored to study the band‐notched behavior effect in antenna, which shows two operating modes, NM‐mode and NB‐mode (NM: normal‐mode, NB: Notched‐mode). The modal metrics is discussed for both modes giving an insights on the bandwidth and radiation potentials. Four RF p‐i‐n diodes are mounted at the Γ‐shaped slot orifice on each antennas, to control the band‐notched operation. At OFF‐state, the antenna is with wide‐band‐rejection from 3.7 to 8.87 GHz and at ON‐state, it works in pure UWB mode. To demonstrate its feasibility, a fabricated antenna of size 24 mm × 24 mm is experimented which are in good agreements with simulated results.