scholarly journals A Textile EBG-Based Antenna for Future 5G-IoT Millimeter-Wave Applications

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 154
Author(s):  
EL May Wissem ◽  
Imen Sfar ◽  
Lotfi Osman ◽  
Jean-Marc Ribero
Keyword(s):  
Cellular Networks ◽  
Millimeter Wave ◽  
Specific Absorption Rate ◽  
Impedance Matching ◽  
Polyester Fabric ◽  
Electromagnetic Bandgap ◽  
Iot Applications ◽  
Textile Antenna ◽  
Textile Fabric

A millimeter-wave (mmWave) textile antenna operating at 26 GHz band for 5G cellular networks is proposed in this paper. The electromagnetic characterization of the textile fabric used as substrate at the operating frequency was measured. The textile antenna was integrated with an electromagnetic bandgap (EBG) structure and placed on a polyester fabric substrate around the antenna. Results showed that the proposed EBG significantly improved the performance of the antenna. The gain and energy efficiency at 26 GHz were 8.65 dBi and 61%, respectively (an increase of 2.52 dB and 7% compared to a conventional antenna), and the specific absorption rate (SAR) was reduced by more than 69.9%. Good impedance matching of the fabricated antenna at the desired frequency was observed when it was bent and worn on the human body. The structure is simple, compact, and easy to manufacture. It may well be suitable for integration into applied clothing in various fields, especially for future IoT applications.

scholarly journals Zirconia-Based Ultra-Thin Compact Flexible CPW-Fed Slot Antenna for IoT

Sensors ◽  
2019 ◽  
Vol 19 (14) ◽  
pp. 3134 ◽  
Author(s):  
María Elena de Cos Gómez ◽  
Humberto Fernández Álvarez ◽  
Blas Puerto Valcarce ◽  
Cebrián García González ◽  
John Olenick ◽  
...  
Keyword(s):  
Impedance Matching ◽  
Slot Antenna ◽  
The Novel ◽  
Frequency Range ◽  
Dielectric Substrates ◽  
Iot Applications ◽  
Radiation Properties ◽  
Novel Material ◽  
The Internet Of Things

An ultra-thin compact flexible CPW-fed slot monopole antenna suitable for the Internet of Things (IoT) applications was achieved as a result of exploring the use of Zirconia-based ENrG’s Thin E-Strate® for the antenna’s design. The electromagnetic characterization of the novel material at the frequency range of interest was analyzed. A comparison was made concerning the required dimensions and the simulation results regarding impedance matching and radiation properties, for three different dielectric substrates: Novel flexible ceramic (ENrG’s Thin E-Strate), rigid Arlon 25N, and flexible Polypropylene (PP). Two different metallization techniques—electrotextile-based and inkjet printing—were used in the fabrication of prototypes based on ENrG’s Thin E-Strate. Return losses measured results for the fabricated prototypes with both procedures was compared, as well as with simulation. The best prototype on the ENrG’s Thin E-Strate was compared with one on Arlon 25N, in terms of radiation properties in an anechoic chamber, and conclusions were drawn.

scholarly journals The Impact of Multi-Connectivity and Handover Constraints on Millimeter Wave and Terahertz Cellular Networks

2021 ◽  
pp. 1-1
Author(s):  
Mustafa F. Ozkoc ◽  
Athanasios Koutsaftis ◽  
Rajeev Kumar ◽  
Pei Liu ◽  
Shivendra S. Panwar
Keyword(s):  
Cellular Networks ◽  
Millimeter Wave ◽  
The Impact

scholarly journals Optimization of spaceflight millimeter-wave impedance matching networks using laser trimming

2021 ◽  
pp. 1-7
Author(s):  
K. Parow-Souchon ◽  
D. Cuadrado-Calle ◽  
S. Rea ◽  
M. Henry ◽  
M. Merritt ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Millimeter Wave ◽  
Impedance Matching ◽  
Wave Impedance ◽  
Low Noise ◽  
Device Performance ◽  
Interface Circuits ◽  
Interface Circuit ◽  
Noise Amplifier

Abstract Realizing packaged state-of-the-art performance of monolithic microwave integrated circuits (MMICs) operating at millimeter wavelengths presents significant challenges in terms of electrical interface circuitry and physical construction. For instance, even with the aid of modern electromagnetic simulation tools, modeling the interaction between the MMIC and its package embedding circuit can lack the necessary precision to achieve optimum device performance. Physical implementation also introduces inaccuracies and requires iterative interface component substitution that can produce variable results, is invasive and risks damaging the MMIC. This paper describes a novel method for in situ optimization of packaged millimeter-wave devices using a pulsed ultraviolet laser to remove pre-selected areas of interface circuit metallization. The method was successfully demonstrated through the optimization of a 183 GHz low noise amplifier destined for use on the MetOp-SG meteorological satellite series. An improvement in amplifier output return loss from an average of 12.9 dB to 22.7 dB was achieved across an operational frequency range of 175–191 GHz and the improved circuit reproduced. We believe that our in situ tuning technique can be applied more widely to planar millimeter-wave interface circuits that are critical in achieving optimum device performance.

Uplink Performance Analysis for Millimeter Wave Cellular Networks With Clustered Users

2020 ◽  
Vol 69 (6) ◽  
pp. 6178-6188
Author(s):  
Nor Aishah Muhammad ◽  
Nur Ilyana Anwar Apandi ◽  
Yonghui Li ◽  
Norhudah Seman
Keyword(s):  
Performance Analysis ◽  
Cellular Networks ◽  
Millimeter Wave
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