Symmetric/Asymmetric Design in Microwave Communication Systems & Embedded Systems for Emerging Wireless Technologies

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Engineering and Materials".

Deadline for manuscript submissions: closed (31 May 2024) | Viewed by 4328

Special Issue Editors


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Guest Editor
Laboratory of Technology of Information and Communication, National School of Applied Sciences ENSA of Tangier, Abdelmalek Essaadi University, Tetouan, Morocco
Interests: electronics and communication engineering; information and communication technology; antenna arrays; telecommunications engineering; wireless communications; electronic engineering

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Guest Editor
Department of Computer Engineering, Université du Québec en Outaouais, Gatineau, QC 18X 3X7, Canada
Interests: computational fluid dynamics; comsol multiphysics; electrical & electronics engineering; power electronics

Special Issue Information

Dear Colleagues,

Symmetric and asymmetric designs are fundamental concepts in microwave communication systems and embedded systems, especially when it comes to accommodating emerging wireless technologies like 5G, IoT (Internet of Things), 6G, and beyond. These concepts play a critical role in optimizing the performance, functionality, and efficiency of these systems. Symmetric design in microwave communication systems and embedded systems for emerging wireless technologies prioritizes balanced components and enhancing signal integrity.

In microwave communication systems, symmetric design typically refers to components or elements that exhibit balance and symmetry in their structure and operation. This balance often results in uniform signal propagation and coverage patterns. For example, a symmetric antenna design, like a dipole antenna, radiates electromagnetic energy uniformly in all directions, creating an omnidirectional coverage pattern. Asymmetric design, on the other hand, leans towards unbalanced components, making it adaptable for diverse devices and network topologies, such as IoT applications and cellular networks.

In embedded systems for emerging wireless technologies, the concepts of symmetric and asymmetric design determine how communication and processing are structured within the system. These design approaches are used to optimize various aspects of the system, such as power consumption, processing speed, and security.

Potential topics include, but are not limited to, the following:

  • Passive components (filters, couplers, transitions, waveguides, etc.);
  • Active components (amplifiers, mixers, oscillators, etc.);
  • RF packaging and package modelling;
  • RF MEMS and microsystems;
  • Sensors and RFID;
  • Embedded systems architecture;
  • Embedded software and hardware;
  • Application-specific processors/devices;
  • Embedded cybersecurity and cryptography;
  • Embedded machine learning, deep learning, and Artificial Intelligence.

Prof. Dr. Jamal Zbitou
Dr. Aziz Oukaira
Guest Editors

Manuscript Submission Information

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Keywords

  • antennas
  • passive and active devices
  • embedded systems
  • machine learning (ML)
  • system-in-package (SIP)
  • thermal management
  • power management

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Published Papers (2 papers)

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Research

20 pages, 12317 KiB  
Article
Symmetry Implications of a 60 GHz Inverted Microstrip Line Phase Shifter with Nematic Liquid Crystals in Diverse Packaging Boundary Conditions
by Jinfeng Li and Haorong Li
Symmetry 2024, 16(7), 798; https://doi.org/10.3390/sym16070798 - 25 Jun 2024
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Abstract
This work demystifies the role that packaging boundary conditions (both physically and electromagnetically) can play in a nematic liquid crystal (NLC)-based inverted microstrip (IMS) phase shifter device operating at the 60 GHz band (from 54 GHz to 66 GHz). Most notably, the air [...] Read more.
This work demystifies the role that packaging boundary conditions (both physically and electromagnetically) can play in a nematic liquid crystal (NLC)-based inverted microstrip (IMS) phase shifter device operating at the 60 GHz band (from 54 GHz to 66 GHz). Most notably, the air box radiating boundary and perfect electric conductor (PEC) enclosing boundary are numerically examined and compared statistically for convergence, scattering parameters, and phase-shift-to-insertion-loss ratio, i.e., figure-of-merit (FoM). Notably, the simulated phase tunability of the radiating air box boundary structure is 8.26°/cm higher than that of the encased (enclosed) PEC boundary structure at 60 GHz. However, the maximum insertion loss of the encased PEC structure is 0.47 dB smaller compared to that of the radiant air box boundary structure. This results in an FoM increase of 29.26°/dB at the enclosed PEC limit (relative to the less-than-optimal airbox radiation limit). Arguably, the NLC-filled IMS phase shifter device packaging with metals fully enclosed (in addition to the default ground plane) enhances the symmetry of the structure, both in the geometry and the materials system. In electromagnetic parlance, it contributes to a more homogenously distributed electric field and a more stable monomodal transmission environment with mitigated radiation and noise. Practically, the addition of the enclosure to the well-established NLC-IMS planar fabrication techniques provides a feasible manufacturing (assembling) solution to acquire the reasonably comparable performance advantage exhibited by non-planar structures, e.g., a fully enclosed strip line and rectangular coaxial line, which are technically demanding to manufacture with NLC. Full article
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14 pages, 3762 KiB  
Article
Design and Optimization of a Mid-Field Wireless Power Transfer System for Enhanced Energy Transfer Efficiency
by Daud Khan, Ashfaq Ahmad and Dong-you Choi
Symmetry 2024, 16(6), 753; https://doi.org/10.3390/sym16060753 - 17 Jun 2024
Viewed by 627
Abstract
Mid-field wireless power transfer (WPT) offers a compelling solution for delivering power to miniature implantable medical devices deep within the human body. Despite its potential, the current power delivery levels remain constrained, and the design of a compact source structure to focus the [...] Read more.
Mid-field wireless power transfer (WPT) offers a compelling solution for delivering power to miniature implantable medical devices deep within the human body. Despite its potential, the current power delivery levels remain constrained, and the design of a compact source structure to focus the transmitter field on such implants presents significant challenges. In this paper, a novel miniaturized transmitter antenna operating at 1.71 GHz is proposed. Leveraging the antenna proximity-coupled feeding technique, we achieve optimal current distribution for efficient power transfer. Additionally, a receiver integrated within the human body is proposed, comprising a slotted ground and a meandering slotted radiating element. This receiver is excited via a coaxial feedline with a truncated ground. Our findings demonstrate wireless power transfer of −23 dB (0.501%) at a distance of 30 mm between the transmitter and receiver, alongside a peak gain of −20 dB with an impedance bandwidth of 39.61%. These results highlight promising advancements in enhancing energy transfer efficiency for deep-implant applications. Full article
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