Antenna Gain Enhancement by Using Low-Infill 3D-Printed Dielectric Lens Antennas

Malik, Bilal Tariq; Doychinov, Viktor; Zaidi, Syed Ali Raza; Robertson, I.D.; Somjit, Nutapong

doi:10.1109/access.2019.2931772

Cited by 50 publications

(22 citation statements)

References 26 publications

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“…Such designs suffer from complex geometries and non-planar structures. Lens-coupled antennas in which a dielectric lens is placed on radiator especially at highfrequencies to focus the radiated beam [11][12]. These antennas have the advantages of high gain and wideband characteristics but have low radiation efficiencies due to the losses in the thick dielectric material and bulky size.…”

Section: Introductionmentioning

confidence: 99%

Metasurface-Based Single-Layer Wideband Circularly Polarized MIMO Antenna for 5G Millimeter-Wave Systems

et al. 2020

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This paper presents a metasurface-based single-layer low-profile circularly polarized (CP) antenna with the wideband operation and its multiple-input multiple-output (MIMO) configuration for fifth-generation (5G) communication systems. The antenna consists of a truncated corner patch and a metasurface (MS) of a 2 × 2 periodic square metallic plates. The distinguishing feature of this design is that all the radiating elements (radiator and MS) are printed on the single-layer of the dielectric substrate, which ensures the low-profile and low-cost features of the antenna while maintaining high gain and wideband characteristics. The wideband CP radiations are realized by exploiting surface-waves along the MS and its radiation mechanism is explained in detail. The single-layer antenna geometry has an overall compact size of 1.0λ0 × 1.0λ0 × 0.04λ0. Simulated and measured results show that the single-layer metasurface antenna has a wide 10 dB impedance bandwidth of 23.4 % (24.5-31 GHz) (23.4 %) and overlapping 3-dB axial ratio bandwidth of 16.8 % (25-29.6 GHz). The antenna also offers stable radiation patterns with a high radiation efficiency (>95%) and a flat gain of 11 dBic. Moreover, a 4-port (2 × 2) MIMO antenna is designed using the proposed design by placing each element perpendicular to each other. Without a dedicated decoupling structure, the MIMO antenna shows an excellent diversity performance in terms of isolation between antenna elements, envelope correlation coefficient, and channel capacity loss. Most importantly, the operational bandwidth of the antenna covers the millimeter-wave (mm-wave) band (25-29.5 GHz) assigned for 5G communication. These features of the proposed antenna system make it a suitable candidate for 5G smart devices and sensors.

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Section: Introductionmentioning

confidence: 99%

Metasurface-Based Single-Layer Wideband Circularly Polarized MIMO Antenna for 5G Millimeter-Wave Systems

et al. 2020

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“…The simulated broadside gain of antenna 1 is 9 dBi at 28 GHz as evident from Figure 8, which indicates a 2 dB gain enhancement compared to the unloaded inset‐fed patch antenna, the gain could be further enhanced by using an expensive higher dielectric constant substrate 6 or by designing an electrically larger lens, 8 but as a consequence of higher gain the angular coverage is compromised and requires higher number of ports to satisfy the wide angular coverage for the indoor application. The measurements were done using gain transfer method with the aforementioned VNA.…”

Section: Antennas With 3d‐printed Superstratesmentioning

confidence: 95%

“…Fabry‐Perot cavity based antennas would deliver high gains but the aperture efficiency might be low 7 . Commercial low‐cost 3D‐printing has been used to design lens, which yield high gain 8 but the design lacks radome feature. It must also be observed that, most of the reported articles have either a superstrate or a partially reflecting surface, which works as a standalone component for gain enhancement but the aforementioned designs lack the radome feature.…”

Section: Introductionmentioning

confidence: 99%

Path loss compensated millimeter wave antenna module integrated with 3D ‐printed radome

Karthikeya

Koul

Poddar

et al. 2020

Int J RF Microw Comput Aided Eng

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Millimeter wave antennas designed at 28 GHz is essential for future 5G base stations or access points and mobile terminals. In this paper, a compact pattern diversity module for millimeter wave 5G base stations is proposed by using 3D‐printing for radome design. In order to achieve path loss compensation in an indoor base station context, the gains of the antennas radiating at ±45° must be 3 dB higher than the antenna radiating in the boresight axis. First, an inset fed patch antenna integrated with a low‐cost industry standard 3D‐printed superstrate with Polylactic acid (PLA) is investigated to study its radiation characteristics. The radome is designed in such a way for optimal gain enhancement with minimal physical footprint. The height of the 2 mm thick superstrate is optimized for a boresight gain of 8 dBi. Second, the 3D‐printed superstrate is optimized for a boresight gain of 11 dBi, which satisfies the criterion of path loss compensation, in this case the antenna achieves an aperture efficiency of close to 72% at 28 GHz. A compact pattern diversity module with customized 3D‐printed radome is also presented to achieve path loss compensation and wide angular coverage of ±70° with associated isolation of less than 35 dB across the ports and the band. Detailed simulation and measurement results are presented.

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“…Various antenna designs have been investigated to increase the gain maintaining a low profile. This includes metamaterial-based antennas, lens-coupled antennas, and Fabry-Perot cavity antennas [18][19][20][21][22][23][24][25]. Moreover, despite the attainment of high gain (necessary to mitigate the effects of increased attenuation and atmospheric absorptions), these antennas exhibit the same capacity as a single element due to a single feed port.…”

Section: Introductionmentioning

confidence: 99%

A Metasurface-Based MIMO Antenna for 5G Millimeter-Wave Applications

et al. 2021

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This work presents a 4-element multiple-input multiple-output (MIMO) antenna with a single layered metasurface array for fifth generation (5G) millimeter-Wave (mm-Wave) communication systems. Each MIMO antenna element is composed of a 1×2 array with a corporate feed network. Moreover, a metasurface array structure consisting of 9×6 Circular Split Ring (CSR) shaped cells is employed to improve the gain and isolation between the MIMO antenna elements. The proposed antenna system is realized using 0.787 mm thick Rogers RT Duroid 5880 substrate. The performance of the antenna is investigated in terms of s-parameters, radiation characteristics, and MIMO parameters. The antenna operates at the mm-Wave frequency band ranging from 24.55 to 26.5 GHz. The incorporation of the metasurface layer enhanced the gain thus attaining a peak measured gain of 10.27 dBi. Additionally, isolation is also improved by 5dB after the employment of metasurface. The investigation of MIMO performance metrics such as Envelope Correlation Coefficient (ECC), Diversity Gain (DG), Channel Capacity Loss (CCL), and Mean Effective Gain (MEG) exhibits good antenna characteristics. The demonstrated radiation properties of the proposed antenna ascertain its suitability for the forthcoming 5G communication systems.

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Antenna Gain Enhancement by Using Low-Infill 3D-Printed Dielectric Lens Antennas

Cited by 50 publications

References 26 publications

Metasurface-Based Single-Layer Wideband Circularly Polarized MIMO Antenna for 5G Millimeter-Wave Systems

Metasurface-Based Single-Layer Wideband Circularly Polarized MIMO Antenna for 5G Millimeter-Wave Systems

Path loss compensated millimeter wave antenna module integrated with 3D ‐printed radome

A Metasurface-Based MIMO Antenna for 5G Millimeter-Wave Applications

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