Metasurface-Based Dual Polarized MIMO Antenna for 5G Smartphones Using CMA

Sultan, K. S.; Abdullah, Haythem H.; Abdallah, Esmat A.; El‐Hennawy, Hadia

doi:10.1109/access.2020.2975271

Cited by 45 publications

(30 citation statements)

References 52 publications

(43 reference statements)

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“…. The simulated ECC is shown in Figure 9; its maximum value did not exceed 0.006, which is considered a very good result according to the recommended value of below 0.3 in literature [24,25], which meant a very low correlation between the MIMO antennas. There are several parameters that measure MIMO parameters, such as the envelop correlation coefficient (ECC), the diversity gain (DG), and the total active reflection coefficient (TARC).…”

Section: B Proposed Vaa Design Considerationsmentioning

confidence: 74%

“…etc. The simulated ECC is shown in Figure 9; its maximum value did not exceed 0.006, which is considered a very good result according to the recommended value of below 0.3 in literature [24,25], which meant a very low correlation between the MIMO antennas. The second parameter is the diversity gain (DG), which can be expressed as Equation (13) [26,27].…”

Section: B Proposed Vaa Design Considerationsmentioning

confidence: 74%

“…The

is calculated according to Equation (12)

where

and

are the antenna radiation patterns of the

and

antennas, respectively, and

. The simulated ECC is shown in Figure 9 ; its maximum value did not exceed 0.006, which is considered a very good result according to the recommended value of below 0.3 in literature [ 24 , 25 ], which meant a very low correlation between the MIMO antennas.…”

Section: Proposed Vaa Configurationsmentioning

confidence: 78%

See 2 more Smart Citations

High-Resolution and Large-Detection-Range Virtual Antenna Array for Automotive Radar Applications

Abdullah

Mabrouk

Kabeel

et al. 2021

Sensors

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Collision avoidance and autonomous control of vehicles have become essential needs for providing a high-quality and safe life. This paper introduces a new generic scheme for a virtual antenna array (VAA) and its application in a train collision-avoidance system (TCAS). The proposed TCAS shall have the capability of identifying the range and angle of an object in front of a moving train and provide the required alerts. Thereby, a new virtual array distribution for both the transmitting and the receiving antenna arrays is introduced to get a long-range object detection and high-resolution multi-input multi-output (MIMO) system. This can be accomplished because the VAA radiation pattern is the multiplication of the radiation patterns for both the transmitting and receiving antenna arrays, which is different than each one of them alone. In this work, the VAA is utilized in radar systems in which the radar range depends on the multiplication of the gain of the transmitting and receiving antennas. So, we introduce a new scheme for the general design of VAA-based radars. A prototype for the antenna system was fixed on a of Texas Instruments platform for the cascading radar. One of the main problems of the VAA is the loss of radiated power in undesired directions, which affects the maximum detection range in beamforming systems and degrades the diversity gain in MIMO applications. These issues have been solved by the introduction of the practical implementation of a proposed high-gain, low side lobe level VAA system for automotive radar that is based on the integration of four AWR1243 RF chips operating in a frequency range of 76 GHz to 81 GHz. It was implemented using low-power 45 nm (TI) RFCMOS technology. The measured gain of the realized VAA was 47.2 dBi, which was 1.815 times higher than that of the Texas instrumentation linear frequency modulated continuous wave (TI’ LFMCW) radar, which was 26 dBi. The proposed VAA saved 45% of the required implementation area compared to the TI’ LFMCW antenna array. The VAA system was fabricated and tested in an anechoic chamber, and it was found that the simulated and measured patterns of the proposed VAA were highly matched in terms of half-power beamwidth and side lobe level.

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Section: B Proposed Vaa Design Considerationsmentioning

confidence: 74%

Section: B Proposed Vaa Design Considerationsmentioning

confidence: 74%

“…The

is calculated according to Equation (12)

where

and

are the antenna radiation patterns of the

and

antennas, respectively, and

Section: Proposed Vaa Configurationsmentioning

confidence: 78%

See 1 more Smart Citation

High-Resolution and Large-Detection-Range Virtual Antenna Array for Automotive Radar Applications

Abdullah

Mabrouk

Kabeel

et al. 2021

Sensors

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show abstract

“…The theory of Characteristic mode (TCM) provides clear physical insights on the mode behaviors of antennas, which is helpful in understanding the underlying radiation mechanism and designing antenna. Thus, characteristic mode analysis (CMA) has been increasingly used to guide MA design for various applications in recent years [21]- [23].…”

Section: A the Characteristic Mode Analysis Of Source-free Mtsmentioning

confidence: 99%

A Dielectric Resonator Fed Wideband Metasurface Antenna With Radiation Pattern Restoration Under its High Order Modes

et al. 2020

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In this paper, a dielectric resonator (DR) excited wideband metasurface (MTS) antenna with differential feeding is proposed, which uses two modes of the MTS and the fundamental mode of the DR to achieve multimode operation and obtain wide bandwidth. Initially, based on the characteristic mode theory, relevant modes of the MTS are analyzed. Then, a DR operating at the fundamental mode (TE δ11 x) is introduced as the magnetic current source to feed the MTS, exciting the dominant mode and high order mode (HOM) of the MTS simultaneously. However, this HOM has a weak gain at the broadside direction and large side lobes. According to the superposition principle of radiation patterns, the maximum at the broadside generated by the DR is utilized to enhance the boresight gain of the HOM, thus transforming the top-weak radiation pattern of this HOM into a broadside one and improving the gain flatness. Additionally, the differential feeding technique is introduced to improve the asymmetry of radiation pattern. Furthermore, by analyzing the out-ofphase currents and the periodicity of the MTS patches, three measures-loading transverse open-ended slots, shortening periodicity and loading longitudinal slots-are introduced to reduce the high side lobe level of the HOM while preserving radiation patterns undistorted and improving the gain stability. As a result, this HOM and the dominant mode of the MTS are combined with the fundamental mode of the DR, achieving multimode operation. Finally, the proposed antenna was fabricated and measured. The measured results agree well with the simulated ones, indicating an impedance bandwidth of 51.4% (4.38-7.41 GHz), a 5-9 dBi inband gain and a 15 dB front-to-back ratio (FBR) within the operating band. INDEX TERMS Dielectric resonator antenna, metasurface, wideband, higher order mode, radiation pattern restoration.

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“…The standards for 5G are still under review, but there are several candidate bands. Some of the frequency bands that are considered for 5G communications are 3 GHz, sub- 6 GHz, and higher frequency bands at millimeter-wave (mm-Wave) bands [ 4 , 5 ]. To meet the high data rate requirements, the MIMO antenna system plays a critical role [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

High Gain Triple-Band Metamaterial-Based Antipodal Vivaldi MIMO Antenna for 5G Communications

et al. 2021

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This paper presents a miniaturized dual-polarized Multiple Input Multiple Output (MIMO) antenna with high isolation. The antenna meets the constraints of sub-6 GHz 5G and the smartphones’ X-band communications. A vertically polarized modified antipodal Vivaldi antenna and a horizontally polarized spiral antenna are designed and integrated, and then their performance is investigated. Three frequency bands of 3.8 GHz, 5.2 GHz, and 8.0 GHz are considered, and the proposed dual-polarized antenna is studied. High isolation of greater than 20 dB is obtained after integration of metamaterial elements, and without applying any other decoupling methods. The proposed triple-band metamaterial-based antenna has 1.6 GHz bandwidth (BW) (2.9 GHz–4.5 GHz), 13.5 dBi gain, and 98% radiation efficiency at 3.8 GHz. At 5.2 GHz it provides 1.2 GHz BW, 9.5 dBi gain, and 96% radiation efficiency. At 8.0 GHz it has 1 GHz BW, 6.75 dBi gain, and 92% radiation efficiency. Four antenna elements (with eight ports) were laid out orthogonally at the four corners of a mobile printed circuit board (PCB) to be utilized as a MIMO antenna for 5G communications. The performance of the MIMO antenna is examined and reported.

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Metasurface-Based Dual Polarized MIMO Antenna for 5G Smartphones Using CMA

Cited by 45 publications

References 52 publications

High-Resolution and Large-Detection-Range Virtual Antenna Array for Automotive Radar Applications

High-Resolution and Large-Detection-Range Virtual Antenna Array for Automotive Radar Applications

A Dielectric Resonator Fed Wideband Metasurface Antenna With Radiation Pattern Restoration Under its High Order Modes

High Gain Triple-Band Metamaterial-Based Antipodal Vivaldi MIMO Antenna for 5G Communications

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