A Low-Profile Broadband Circularly Polarized mmWave Antenna With Special-Shaped Ring Slot

Chen, Huakang; Shao, Yu; Zhang, Yajing; Zhang, Changhong; Zhang, Zhizhong

doi:10.1109/lawp.2019.2920875

Cited by 41 publications

(20 citation statements)

References 9 publications

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“…In addition, the wider bandwidth in [24] was achieved using a Substrate-Integrated Waveguide (SIW) cavity and a very thick (0.11λ 0 ) substrate. While broadband "wire-type" antennas such as [37] achieve higher efficiency and bandwidth on low-loss substrates, the antenna requires double-sided etching and the efficiency is only achiev- able with tanδ<0.001 substrates. Other printed TM 10 patches, [40], [41], implemented on low-cost substrates or using printed conductors achieve a narrower bandwidth and a lower radiation efficiency than the proposed antenna.…”

Section: B Antenna Radiation Patternsmentioning

confidence: 99%

Millimeter Wave Power Transmission for Compact and Large-Area Wearable IoT Devices based on a Higher-Order Mode Wearable Antenna

Wagih¹,

Hilton²,

Weddell³

et al. 2021

Preprint

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Owing to the shorter wavelength in the millimeter-wave (mmWave) spectrum, miniaturized antennas can receive power with a higher efficiency than UHF bands, promising sustainable mmWave-powered Internet of Things (IoT) devices. Nevertheless, the performance of a mmWave power receiver has not been compared, numerically or experimentally, to its sub-6 GHz counterpart. In this paper, the performance of mmWave-powered receivers is evaluated based on a novel wearable textile-based higher-order mode microstrip antenna, showing the benefits of wireless power transmission (WPT). Firstly, a broadband antenna is proposed maintaining a stable wearable measured bandwidth from 24.9 to 31.1 GHz, over three-fold improvement compared to a conventional patch. The proposed antenna has a measured 8.2 dBi co-polarized gain with the highest thickness-normalized efficiency of a wearable antenna. When evaluated for compact power receivers, the measured path gain shows that WPT at 26 GHz outperforms 2.4 GHz by 11 dB. A rectenna array based on the proposed antenna is then evaluated analytically showing the potential for up to 6.3x higher power reception compared to a UHF patch, based on the proposed antenna's gain and an empirical path-loss model. Both use cases demonstrate that mmWave-powered rectennas are suitable for area-constrained and large-area wearable IoT applications.

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Section: B Antenna Radiation Patternsmentioning

confidence: 99%

Millimeter Wave Power Transmission for Compact and Large-Area Wearable IoT Devices based on a Higher-Order Mode Wearable Antenna

Wagih¹,

Hilton²,

Weddell³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Other relevant research directions are focused on the areas of mmWave channel modeling [43]- [47], transceiver design [48]- [52] and antenna design [53]- [58]. The core research directions in mmWave wireless systems are summarized in Table 3.…”

Section: ) Millimeter-wave Communicationsmentioning

confidence: 99%

A Prospective Look: Key Enabling Technologies, Applications and Open Research Topics in 6G Networks

et al. 2020

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The fifth generation (5G) mobile networks are envisaged to enable a plethora of breakthrough advancements in wireless technologies, providing support of a diverse set of services over a single platform. While the deployment of 5G systems is scaling up globally, it is time to look ahead for beyond 5G systems. This is mainly driven by the emerging societal trends, calling for fully automated systems and intelligent services supported by extended reality and haptics communications. To accommodate the stringent requirements of their prospective applications, which are data-driven and defined by extremely lowlatency, ultra-reliable, fast and seamless wireless connectivity, research initiatives are currently focusing on a progressive roadmap towards the sixth generation (6G) networks, which are expected to bring transformative changes to this premise. In this article, we shed light on some of the major enabling technologies for 6G, which are expected to revolutionize the fundamental architectures of cellular networks and provide multiple homogeneous artificial intelligence-empowered services, including distributed communications, control, computing, sensing, and energy, from its core to its end nodes. In particular, the present paper aims to answer several 6G framework related questions: What are the driving forces for the development of 6G? How will the enabling technologies of 6G differ from those in 5G? What kind of applications and interactions will they support which would not be supported by 5G? We address these questions by presenting a comprehensive study of the 6G vision and outlining seven of its disruptive technologies, i.e., mmWave communications, terahertz communications, optical wireless communications, programmable metasurfaces, drone-based communications, backscatter communications and tactile internet, as well as their potential applications. Then, by leveraging the state-of-the-art literature surveyed for each technology, we discuss the associated requirements, key challenges, and open research problems. These discussions are thereafter used to open up the horizon for future research directions. INDEX TERMS 6G, backscatter communications, drone-based communications, terahertz communications, metasurfaces, mmWave, optical wireless communications, tactile internet.

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“…Figure 2 shows the top view and bottom view of the proposed radiating element. is radiating element is based on our previous work [21], in which a planar Archimedean spiral on the top layer and a specialshaped ring slot on the bottom layer are used to generate annular currents for CP radiation. CP radiation can be generated by both archimedean spiral and special-shaped ring slot, and these two radiators couple together to significantly improve the ARBW and radiation pattern.…”

Section: Radiating Elementmentioning

confidence: 99%

A Millimeter-Wave Wideband Circularly Polarized Planar Spiral Antenna Array with Unequal Amplitude Feeding Network

Chen

Shao

et al. 2021

International Journal of Antennas and Propagation

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A 2 × 2 wideband circularly polarized (CP) antenna array operating at millimeter wave (mmWave) band is presented. The array element is a wideband CP Archimedean spiral radiator with special-shaped ring slot. The elements are fed by an unequal amplitude (UA) feeding network based on a microstrip line (MSL) power divider. The side lobe level is improved by this UA feeding network. In addition, a cross slot is employed to isolate the elements for decoupling. A prototype is fabricated, and the measured results show that the proposed array achieves an impedance bandwidth (IBW) of 6.31 GHz (22.5% referring to 28 GHz) and an axial ratio bandwidth (ARBW) of 7.32 GHz (26.1% referring to 28 GHz). The peak gain of the proposed array is 11.3 dBic, and the gain is greater than 9.3 dBic within the whole desired band (from 25 GHz to 31 GHz). The proposed array consists of only one substrate layer and can be built by the conventional printed circuit board technology. Attributed to the characteristics of wide bandwidth, simple structure, low profile, and low cost, the proposed antenna array has a great potential in mmWave wireless communications.

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A Low-Profile Broadband Circularly Polarized mmWave Antenna With Special-Shaped Ring Slot

Cited by 41 publications

References 9 publications

Millimeter Wave Power Transmission for Compact and Large-Area Wearable IoT Devices based on a Higher-Order Mode Wearable Antenna

Millimeter Wave Power Transmission for Compact and Large-Area Wearable IoT Devices based on a Higher-Order Mode Wearable Antenna

A Prospective Look: Key Enabling Technologies, Applications and Open Research Topics in 6G Networks

A Millimeter-Wave Wideband Circularly Polarized Planar Spiral Antenna Array with Unequal Amplitude Feeding Network

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