Broadband Circular Polarised Printed Antennas for Indoor Wireless Communication Systems: A Comprehensive Review

Al-Gburi, Ahmed Jamal Abdullah; Zakaria, Zahriladha; Alsariera, Hussein; Akbar, Muhammad Firdaus; Ibrahim, Imran Mohd; Ahmad, Khalid; Ahmad, Sarosh; Al‐Bawri, Samir Salem

doi:10.3390/mi13071048

Cited by 22 publications

(11 citation statements)

References 143 publications

(217 reference statements)

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“…In recent decades, some research has considered antenna design with polarization diversity − and with a strong focus on circular polarizations. ,− This has led to a range of novel wireless communication systems harnessing circularly polarized light, which should be compatible with our OMM device. This makes an OMM device with a small form factor a useful solution to future OAM detection that can be readily integrated into practical OAM communication systems.…”

Section: Discussionmentioning

confidence: 99%

Metasurface Measuring Twisted Light in Turbulence

Dinter

Kühner

et al. 2022

ACS Photonics

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Orbital angular momentum (OAM) of light represents an independent degree of freedom using orthogonal helical modes for optical and quantum multiplexing, offering great potential to transform future ultrahigh-bandwidth information systems. Practical OAM communication systems suffer from turbulence-induced phase distortions to the propagating beams, decreasing the orthogonality of OAM modes through introduced modal crosstalk. To date, optical systems used for measuring OAM orthogonality breakdown in different turbulence conditions are too bulky and slow (e.g., one OAM mode at a time) for any practical use. Here, we demonstrate the use of an ultrathin OAM modesorting metasurface for characterizing the OAM orthogonality breakdown under different turbulence conditions. Our approach allows the measurement of the whole OAM spectrum at the same time. This metasurface exhibits strong OAM selectivity with an average modal crosstalk below −42.4 dB for OAM modes with topological charges ranging from −15 to +15. Our results suggest that higher-order OAM modes are as robust as lower-order modes in particular turbulence environments, paving the way for future practical free-space OAM communications harnessing high-dimensional OAM multiplexing. We demonstrated that a flat optical device with a small form factor can be integrated with practical communication systems for compact, fast, and efficient generation and detection of twisted light.

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Section: Discussionmentioning

confidence: 99%

Metasurface Measuring Twisted Light in Turbulence

Dinter

Kühner

et al. 2022

ACS Photonics

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“…A wireless body area network (WBAN) is a group of low-power, miniature, lightweight wireless sensors that monitor internal and external body health processes. WBANs help in monitoring physiological behavior patterns in humans and studying disease prevention and control [ 1 ]. The WBAN’s ultra-lightweight, wearable sensors can be either off-body or on-body [ 2 ] and could be operated in MIMO systems [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Circularly Polarized Textile Sensors for Microwave-Based Smart Bra Monitoring System

et al. 2023

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This paper presents a conformal and biodegradable circularly polarized microwave sensor (CPMS) that can be utilized in several medical applications. The proposed textile sensor can be implemented in a Smart Bra system for breast cancer detection (BCD) and a wireless body area network (WBAN). The proposed sensor is composed of a wideband circularly polarized (CP) textile-based monopole antenna with an overall size of 33.5 × 33.5 mm2 (0.2 λo × 0.2 λo) and CPW feed line. The radiating element and ground are fabricated using silver conductive fabric and stitched to a cotton substrate of thickness 2 mm. In the proposed design, a slot is etched in the radiating element to extend bandwidth from 1.8 to 8 GHz at |S11| ≤ −10 dB. It realizes a circularly polarized output with AR ≤ 3 dB operation band from 1.8 to 4 GHz and an average gain of 6 dBi. The proposed CPMS’s performance is studied both off-body (air) and on-body in proximity to breast models with and without tumors using near-field microwave imaging. Moreover, the axial ratio is recorded as a feature for a circularly polarized antenna and adds another degree of freedom for cancer detection and data analysis. It assists in detecting tumors in the breast by analyzing the magnitude of the electric field components in vertical and horizontal directions. Finally, the radiation properties are recorded, as well as the specific absorption rate (SAR), to ensure safe operation. The proposed CPMS covers a bandwidth of 1.8–8 GHz with SAR values following the 1 g and 10 g standards. The proposed work demonstrates the feasibility of using textile antennas in wearables, microwave sensing systems, and wireless body area networks (WBANs).

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“…This principle also holds true for both Mm-wave communication systems and Indoor Wireless Communication (IWC) technology, particularly in crowded indoor conditions, where CP enhances channel performance by reducing multi-path interference, low absorption losses, and signal attenuation [ 22 , 23 , 24 ]. In [ 25 ], the authors present interesting research on waveguide indoor antennas as well as the two most common approaches to planar indoor antennas, namely broadband CP printed monopole antennas (BCPPMAs) and broadband CP printed slot antennas (BCPPSAs), as Broadband Circular Polarised Printed Antennas for Indoor Wireless Communication Systems.…”

Section: Introductionmentioning

confidence: 99%

High-Gain Wideband Circularly Polarised Fabry–Perot Resonator Array Antenna Using a Single-Layered Pixelated PRS for Millimetre-Wave Applications

et al. 2022

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In this paper, a wideband and high-gain circular polarised Fabry–Perot Resonator Antenna (FPRA) with a single partially reflective surface (PRS) layer is automatically generated and optimised using a VBA-based interface system between CST Microwave studio and Matlab. The proposed PRS layer is a promising superstrate for wideband and high-gain FP resonator antennas due to its relatively high reflection coefficient magnitude and positive phase gradient, which resemble that of the optimum PRS over the relevant frequency band. The circular polarisation was achieved using a sequential feeding network for a 2 × 2 array air-gapped slot-coupled elliptical patch antenna. The proposed design achieved an impedance bandwidth of 48.58% (15.3 GHz) ranging from 23.84 GHz to 39.14 GHz, and the −3 dB gain bandwidth was 22.42% (6.25 GHz) from 24.75 to 31 GHz, with a peak gain of 17.12 dB at 29 GHz, and an axial ratio bandwidth of 21.75% (6.2 GHz). In addition, the achieved radiation efficiency was 90%. Consistent and almost invariant radiation patterns are achieved over the millimetre-wave frequency band of interest. The experimental and simulated results are in good agreement, justifying the feasibility of the proposed design as a high-gain and wideband FP resonator array antenna for Mm-wave applications.

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Broadband Circular Polarised Printed Antennas for Indoor Wireless Communication Systems: A Comprehensive Review

Cited by 22 publications

References 143 publications

Metasurface Measuring Twisted Light in Turbulence

Metasurface Measuring Twisted Light in Turbulence

Circularly Polarized Textile Sensors for Microwave-Based Smart Bra Monitoring System

High-Gain Wideband Circularly Polarised Fabry–Perot Resonator Array Antenna Using a Single-Layered Pixelated PRS for Millimetre-Wave Applications

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