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Electronics
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Advances in Micro/mm Waves Circuits and Antennas
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Advances in Micro/mm Waves Circuits and Antennas

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

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 5837

Special Issue Editor

Dr. Muhammad Ikram

E-Mail Website
Guest Editor
School of Information Technology and Electrical Engineering, University of Queensland, Brisbane 4067, Australia
Interests: microwave sensors; integrated MIMO antenna designs for 4G/5G devices; antenna arrays for mm-wave; frequency and polarization reconfigurable antenna arrays; antenna for medical applications; flat panel terminal antenna system for satellite communication; and intelligent reconfigurable surfaces (IRS)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The global mobile data traffic has been increased dramatically in recent years due to high demand in secure, fast, and large data transmission rates in many recent and advanced applications, including broadcasting, Internet of Things (IoT), automobiles, smart cities, energy, emergencies communication, and wearable devices. This has put a lot of pressure on the current 3G/4G/WiFi wireless communication systems to upgrade their capacity and performance. Each generation of mobile and wireless communication systems has been established to meet those demands. Nevertheless, the data hungry devices used in the above-mentioned applications have increased a lot and require huge data rates. One potential way of enhancing capacity and data rates in the current and future mobile and wireless generations is the bandwidth. The data rates are directly proportional to the bandwidth. The higher bandwidth provides higher data rates. The larger bandwidth is available at micro/mm Wave bands. Nevertheless, to enable wireless devices at those bands is a real challenge.

Thus, the purpose of this issue to lay out the state-of-the-art circuits and antennas which will enable micro/mm Wave band communication to achieve higher bandwidth. This will ultimately offer a high demand in data rates.

Dr. Muhammad Ikram
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Electronics is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • integrated 5G/satellite antennas
  • 5G/B5G antennas
  • 6G
  • MIMO antennas
  • beamforming circuits and systems
  • phased arrays
  • metamaterials
  • intelligent reflecting surfaces
  • THz circuits and antennas

Published Papers (3 papers)

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Research

18 pages, 8492 KiB  
Article
High-Capacity Double-Sided Square-Mesh-Type Chipless RFID Tags
by Muhammad Noman, Usman A. Haider, Hidayat Ullah, Muhammad Ikram, Hatem Rmili and Farooq A. Tahir
Electronics 2023, 12(6), 1371; https://doi.org/10.3390/electronics12061371 - 13 Mar 2023
Cited by 1 | Viewed by 1239
Abstract
This paper presents a novel methodology for designing high-capacity frequency domain chipless RFID tags based on the backscattering principle. The tag consists of multiple square open-loop resonators loaded with a varying number of square metallic patches to form a mesh structure. Thus, in [...] Read more.
This paper presents a novel methodology for designing high-capacity frequency domain chipless RFID tags based on the backscattering principle. The tag consists of multiple square open-loop resonators loaded with a varying number of square metallic patches to form a mesh structure. Thus, in contrast to conventional designs, the overall physical size of each resonator remains fixed and does not change with respect to its operating resonant frequency. The RCS response of the proposed tag can be easily manipulated by varying the loading factor of each resonator. The tag size is further miniaturized by placing resonators on both sides of the substrate used. The tag configuration with resonators arranged in the form of a single row (4 × 1) printed on both sides of the substrate is finally chosen for maximum robustness and efficiency. The frequency shift coding (FSC) technique is used to encode more than one bit per resonator by using segments within sub-bands. The proposed tag encodes 16-bit data in a frequency band from 5.9 to 10.5 GHz and has a very high code density of 23.51 bits/cm2 and a spectral efficiency of 3.47 bits/GHz. The design methodology is novel and leads to a very efficient chipless RFID tag that can be used in a variety of high-data-capacity applications. Full article
(This article belongs to the Special Issue Advances in Micro/mm Waves Circuits and Antennas)
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14 pages, 12865 KiB  
Article
A Semi-Octagonal 40-Bit High Capacity Chipless RFID Tag for Future Product Identification
by Usman A. Haider, Muhammad Noman, Aamir Rashid, Hatem Rmili, Hidayat Ullah and Farooq A. Tahir
Electronics 2023, 12(2), 349; https://doi.org/10.3390/electronics12020349 - 10 Jan 2023
Cited by 4 | Viewed by 1881
Abstract
This paper presents a unique geometry of a chipless radio frequency identification (RFID) tag for encoding a large number of bits in a very small form factor. The tag geometry consists of semi-octagonal copper strips, sequentially laid on a single side of an [...] Read more.
This paper presents a unique geometry of a chipless radio frequency identification (RFID) tag for encoding a large number of bits in a very small form factor. The tag geometry consists of semi-octagonal copper strips, sequentially laid on a single side of an ultra-thin substrate. A unique and robust encoding mechanism for the tag identification (ID) is proposed. The operating frequency spectrum of the tag ranges from 3.1 to 10.5 GHz. The tag is compact, having an overall size of 14.5 × 28 mm2. The proposed tag exhibits very high code density of 9.85 bits/cm2 and spectral efficiency of 5.4 bits/GHz. The unique geometric configuration of the proposed tag allows it to encode up to 40 bits of data as an RCS signature. This chipless RFID tag seems to be a potential candidate for a wide range of modern RFID applications. Full article
(This article belongs to the Special Issue Advances in Micro/mm Waves Circuits and Antennas)
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13 pages, 3895 KiB  
Article
A Compact Low-Profile Antenna for Millimeter-Wave 5G Mobile Phones
by Hidayat Ullah, Hattan F. Abutarboush, Aamir Rashid and Farooq A. Tahir
Electronics 2022, 11(19), 3256; https://doi.org/10.3390/electronics11193256 - 10 Oct 2022
Cited by 11 | Viewed by 1819
Abstract
This paper presents a very low profile and simple antenna design for dual beam and dual-band operation to be employed in future 5G mobile phones operating in the millimeter-wave bands of 26.75–30.31 and 35.83–41.22 GHz. The two distinct resonances at 28 and 38 [...] Read more.
This paper presents a very low profile and simple antenna design for dual beam and dual-band operation to be employed in future 5G mobile phones operating in the millimeter-wave bands of 26.75–30.31 and 35.83–41.22 GHz. The two distinct resonances at 28 and 38 GHz are achieved using a meta-material-based structure consisting of a closed-ring resonator (CRR) and a split-ring resonator (SRR) by co-centrically combining two planar hexagonal rings; i.e., an inner split-ring resonator (SRR) and an outer closed-ring resonator (CRR). The antenna has a high gain of 4.5 dBi. The antenna also exhibits a dual-beam radiation pattern in one of its planes. The overall antenna size is 6 × 8 mm2 and is manufactured using a low-cost PCB fabrication process. The antenna’s dual-beam operation, broadband characteristics, high gain, and low profile makes it a potential candidate for future millimeter-wave mobile phones, especially in applications where space diversity is required. Full article
(This article belongs to the Special Issue Advances in Micro/mm Waves Circuits and Antennas)
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