Performance Comparison between Polyester and Denim Textile Antenna on Non-Identical Human Upper Arm Sizes for 5G mid-band

Noor, Shehab Khan; Ramli, Norazan Mohamed; Rahman, Nurul Huda Abd; Yasin, Mohd Najib Mohd

doi:10.1109/iconspace53224.2021.9768724

Cited by 3 publications

(3 citation statements)

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“…UCA, DRA and Metasurface methods can be used for a wide range of frequencies, such as lower bands to higher bands. As a 5G communication system has a lower band of 700 MHz, a mid-band of 3.5 GHz, and a high band of 28 GHz [63]. It is important for an OAM waves generation method to work efficiently in various frequency bands.…”

Section: F Comparison Between Different Oam Generation Methodsmentioning

confidence: 99%

A Review of Orbital Angular Momentum Vortex Waves for the Next Generation Wireless Communications

et al. 2022

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The next-generation wireless technology that can fulfill such a demand, namely the fifthgeneration (5G) technology, should provide 1000 times larger capacity. Moreover, sixth-generation (6G) communication, which represents a significant upgrade from the fifth-generation (5G) network and is anticipated to operate from 100 GHz to 3 THz band, will be required in the years after 2030 due to newly developed data-hungry applications and the greatly expanded wireless network. To meet the ever-growing demands of wireless carriers, an efficient wireless access method that can improve wireless area throughput without expanding bandwidth or cell size is required. Radio Frequency (RF) Orbital Angular Momentum vortex waves (which is now on referred to as OAM waves) to address the concerns mentioned above have attracted much attention in recent years. Due to their orthogonality, different OAM waves of different modes can be multiplexed in the same frequency channel, which can greatly increase the channel capacity. Using the orthogonal modes, a new type of multiple access scheme known as Mode Domain Multiple Access (MDMA) can be used by multiple users using the same frequency channel without additional resources such as frequency and time. As a result, the channel capacity for the next generation wireless communication systems can be enhanced as well as the overall spectrum efficiency can be improved. This review paper begins with an overview of the next generation communication such as 5G communication technology and beyond. This paper first briefly discusses the theory of OAM waves and several methods to generate OAM waves. Various different designs have also been analyzed for their ability to generate OAM waves and discussion on several restrictions and solutions to resolve. Open concerns and development trends are discussed for possible future RF OAM antenna upgrades. This study also proposes that for next generation wireless communication employing OAM, the typically used Uniform Circular Array (UCA) could be paired with the Multiple-Input-Multiple-Output (MIMO) system to improve performance in dense or urban areas for multiusers. In addition, the purity of OAM-modes needs to be considered for efficient utilization of the OAM system for future communications at the radio domain.INDEX TERMS Orbital angular momentum (OAM) waves, uniform circular array antenna, 5G communication systems, antenna review paper, future wireless communication survey. I. INTRODUCTIONAdvances in mobile communications have significantly impacted economic and social growth over the past few decades. There have been noteworthy improvements with every generation of communication technology in terms of data rate, channel capacity, advanced applications such as video call, real-time health monitoring and so on. Based on the survey [1], it all started in the 1980s with the first generation (1G) technology, which mainly employed analog signals for voice services. The data rate was up to 2.4 Kbps.

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Section: F Comparison Between Different Oam Generation Methodsmentioning

confidence: 99%

A Review of Orbital Angular Momentum Vortex Waves for the Next Generation Wireless Communications

et al. 2022

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“…Furthermore, it must not cause any discomfort to the human skin when being worn for extended periods of time [1][2] [3], besides incorporating additional design steps to ensure satisfactory operation of wireless standards and safety of the user [4]. Besides that, wristwearable antenna designs also need to meet the following requirements: compact, flexible substrate and radiating element, high antenna gain, wider bandwidth and cost efficient [2][5] [6].…”

Section: Introductionmentioning

confidence: 99%

“…Different types of dielectrics materials are available for wearable antennas such as jeans [1][9], silk [2], Teflon [10], felt [4][11] [12], polyester [6][13], FR4 [7], flexible rogers [14], polyimide [3], Taconic-RF [8], and cotton [15]. Low dielectric constants fabrics are used to reduce surface wave loss and improve bandwidth [2].…”

Section: Introductionmentioning

confidence: 99%

Compact Wideband Wearable Antipodal Vivaldi Antenna for 5G Applications

Sahoo

Al‐Hadi

Azemi

et al. 2022

2022 IEEE International RF and Microwave Conference (RFM)

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In this paper, a compact wearable antipodal Vivaldi antenna resonating at 3.5 GHz is proposed for 5G n77 and n78 bands. It is designed on a flexible polyester substrate with a dielectric constant (ɛr) of 2 and loss tangent (tan δ) of 0.005. The antenna parameters were optimized via parametric analyses using CST software with a size of 33 × 33 mm 2 (length × width). The antenna is evaluated in terms of reflection coefficient (S11), gain, efficiency, radiation pattern and surface current density and itsreflection coefficient is verified with measurement. This antenna attained a maximum simulated gain of 4.17 dBi and an efficiency of 98.18 % in the resonating band.

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