Special Issue "Reconfigurable Antennas"

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Microwave and Wireless Communications".

Deadline for manuscript submissions: 15 July 2020.

Special Issue Editors

Dr. Dimitris Anagnostou
Website1 Website2
Guest Editor
Institute of Signals, Sensors and Systems, Heriot Watt University, EM2.12, Edinburgh, Edinburgh, EH14 4AS, UK
Interests: 5G; lightweight and reconfigurable antennas; arrays; radar and RF sensing
Special Issues and Collections in MDPI journals
Prof. Michael Chryssomallis
Website
Guest Editor
Department of Electrical and Computer Engineering, Democritus University of Thrace, Xanthi, Greece
Interests: microstrip antennas; reconfigurable antennas; RF-MEMs; smart antennas; direction of arrival (DoA) algorithms; characterization and modeling of wireless propagation channel phenomena

Special Issue Information

Dear Colleagues,

Antennas that can operate in different complex environments will be part of every modern wireless communication system, such as 5G, IoT, and radar applications. These new networks require antennas with a high degree of reconfigurability. In order to meet the abovementioned requirements, reconfigurable antennas and advanced phased arrays with adaptive nulling, multiple beams, low sidelobes, as well as different signal processing techniques provide effective solutions. Such kinds of antennas are commonly used in several fields of applications, such as airport surveillance, missile detection, and tracking. Of particular interest for this Special Issue are novelties in the element design and materials, system architecture, array feeding, and array reflection, radiation, and scattering properties. As these research areas have different developmental statuses and trends, it is important to examine the current state of the art and project future research directions.  We invite researchers to contribute original papers describing applications and experiences on the emerging trends of reconfigurable antennas for solving different design problems. The purpose of this Special Issue is to publish high-quality research papers as well as review articles addressing recent advances on reconfigurable antennas.

Technical Program Committee Member

Prof. Xiao Ding, Associate Professor

Institute of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China

Email: [email protected]

Website: http://faculty.uestc.edu.cn/dingxiao

Interest: phased array; reconfigurable antenna; computational electromagnetics

Dr. Dimitris Anagnostou
Prof. Michael Chryssomallis
Prof. Sotirios Goudos
Guest Editors

Manuscript Submission Information

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Keywords

  • Reconfigurable antennas and massive MIMO arrays for 5G and beyond
  • Reconfigurable MIMO antennas (antennas for MIMO applications)
  • Wideband reconfigurable antennas
  • Reconfigurable beam scanning arrays
  • Reconfigurable array feed networks
  • Reconfigurable metasurfaces and metasurface elements
  • Fully adaptive arrays
  • New phased array system architectures: new design techniques and applications
  • New feeding techniques
  • Advanced algorithms of array analysis and synthesis
  • Antennas and systems for wireless sensing and tracking (e.g., vital sign sensing)
  • Low radar cross-section antennas
  • Switched beam antennas
  • Multifrequency antennas

Published Papers (4 papers)

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Research

Open AccessArticle
Characterization of Novel Structures Consisting of Micron-Sized Conductive Particles That Respond to Static Magnetic Field Lines for 4G/5G (Sub-6 GHz) Reconfigurable Antennas
Electronics 2020, 9(6), 903; https://doi.org/10.3390/electronics9060903 - 29 May 2020
Abstract
Controlling Radio Frequency (RF) signals through switching technology is of interest to designers of modern wireless platforms such as Advanced Wireless services (AWS) from 2.18 GHz–2.2 GHz, mid-bands of sub-6 GHz 5G (2.5 GHz and 3.5 GHz), and 4G bands around 600 MHz/700 [...] Read more.
Controlling Radio Frequency (RF) signals through switching technology is of interest to designers of modern wireless platforms such as Advanced Wireless services (AWS) from 2.18 GHz–2.2 GHz, mid-bands of sub-6 GHz 5G (2.5 GHz and 3.5 GHz), and 4G bands around 600 MHz/700 MHz, 1.7 GHz/2.1 GHz/2.3 GHz/2.5 GHz. This is because certain layout efficiencies can be achieved if suitable components are chosen to control these signals. The objective of this paper is to present a new model of an RF switch denoted as a Magnetostatic Responsive Structure (MRS) for achieving reconfigurable operation in 4G/5G antennas. In particular, the ABCD matrices of the MRS are derived from the S-parameter values and shown to be a good model from 100 kHz to 3.5 GHz. Furthermore, an overall agreement between simulations, analytical results, and circuit model values are shown. Full article
(This article belongs to the Special Issue Reconfigurable Antennas)
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Open AccessFeature PaperArticle
Optimal Design of Aperiodic Reconfigurable Antenna Array Suitable for Broadcasting Applications
Electronics 2020, 9(5), 818; https://doi.org/10.3390/electronics9050818 - 16 May 2020
Abstract
An aperiodic reconfigurable microstrip antenna array is designed to serve as a DVB-T base station antenna operating in a single broadcasting channel. The antenna array is optimized at 698 MHz (center frequency of DVB-T channel 49) to concurrently achieve a particular radiation pattern [...] Read more.
An aperiodic reconfigurable microstrip antenna array is designed to serve as a DVB-T base station antenna operating in a single broadcasting channel. The antenna array is optimized at 698 MHz (center frequency of DVB-T channel 49) to concurrently achieve a particular radiation pattern shaping with high forward gain, main lobe tilting and null filling inside the service area, as well as low sidelobe level outside the service area, and low standing wave ratio at the inputs of all the array elements. To concurrently satisfy all the above requirements, both the geometry dimensions and the array feeding weights (amplitudes and phases) are optimized, thus leading to a complex multi-variable and multi-objective problem. The problem is solved by applying a recently developed particle swarm optimization (PSO) improved variant, called PSO with velocity mutation, in conjunction with the CST software package, which is employed by the PSOvm every time a full-wave analysis is required. Furthermore, all the optimization methods found in the CST environment are compared with the PSOvm. The results show that the PSOvm is capable of producing an antenna array geometry, which is closer to the predefined requirements than the geometries derived by the rest of the optimizers, in the least amount of computational time. Full article
(This article belongs to the Special Issue Reconfigurable Antennas)
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Open AccessFeature PaperArticle
Ultra-Compact Reconfigurable Band Reject UWB MIMO Antenna with Four Radiators
Electronics 2020, 9(4), 584; https://doi.org/10.3390/electronics9040584 - 30 Mar 2020
Cited by 1
Abstract
A compact reconfigurable UWB MIMO antenna with four radiators that accomplish on-demand band rejection from 4.9 to 6.3 GHz is presented. An LC stub is connected to the ground plane by activating the PIN diode for each radiator. Two radiators are placed perpendicular [...] Read more.
A compact reconfigurable UWB MIMO antenna with four radiators that accomplish on-demand band rejection from 4.9 to 6.3 GHz is presented. An LC stub is connected to the ground plane by activating the PIN diode for each radiator. Two radiators are placed perpendicular to each other to exploit the polarization diversity on a compact 25 × 50 mm 2 FR4 laminate. Two additional radiators are then fixed obliquely on the same laminate (without increasing size) in angular configuration at ±45 perpendicular to the first two planar radiators still exploiting polarization diversity. The design is validated by prototyping and comparing the results with the simulated ones. On demand band rejection through the use of PIN diodes, wide impedance matching (2–12 GHz), high isolation amongst the radiators, compactness achieved by angular placement of the radiators, low gain variation over the entire bandwidth, band rejection control achieved by adjusting the gap between stub and ground plane, and low TARC values makes the proposed design very suitable for commercial handheld devices (i.e., Huawei E5785 and Netgear 815S housings). The proposed configuration of the UWB MIMO radiators has been investigated first time as per authors’ knowledge. Full article
(This article belongs to the Special Issue Reconfigurable Antennas)
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Open AccessArticle
Reconfigurable 3-D Slot Antenna Design for 4G and Sub-6G Smartphones with Metallic Casing
Electronics 2020, 9(2), 216; https://doi.org/10.3390/electronics9020216 - 25 Jan 2020
Abstract
The design of a reconfigurable three-dimensional (3-D) slot antenna for 4G and sub-6G smartphone application is presented in this paper. The antenna is located at the bottom of the smartphone and integrated with a metallic casing. Positive-Intrinsic-Negative (PIN) diodes are loaded at the [...] Read more.
The design of a reconfigurable three-dimensional (3-D) slot antenna for 4G and sub-6G smartphone application is presented in this paper. The antenna is located at the bottom of the smartphone and integrated with a metallic casing. Positive-Intrinsic-Negative (PIN) diodes are loaded at the dual-open slot and the folded U-shaped slot, respectively, which are used to realize four working states. The antenna has a compact volume of 42 × 6 × 6 mm3, which can cover the long term evolution (LTE) bands of 698–960 MHz and 1710–2690 MHz, and the sub-6G bands of 3300–3600 MHz & 4800–5000 MHz. The design processes are presented and the structure is optimized, fabricated and measured. The comparison to other state-of-the-art antennas shows that the proposed design has multiband characteristics with small size. Full article
(This article belongs to the Special Issue Reconfigurable Antennas)
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