Broadband Proximity-Coupled Microstrip Planar Antenna Array for 5G Cellular Applications

Diawuo, Henry Abu; Jung, Young‐Bae

doi:10.1109/lawp.2018.2842242

Cited by 92 publications

(42 citation statements)

References 14 publications

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“…When specifying this component of error for a specific antenna, the worst error case for reflection coefficient is usually taken [17]. If we calibrate the system to the connection point of the antenna, |S21| = |S12| = 1, and the error associated to the normalization is given by: √(ue receiver ) 2 + (ue receiver ) 2 , where ue receiver is the standard uncertainty associated to the receiver.…”

Section: )mentioning

confidence: 99%

Uncertainty Assessment of a Small Rectangular Anechoic Chamber: From Design to Operation

Expósito

Sánchez

Cuiñas

2020

IEEE Trans. Antennas Propagat.

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Anechoic chambers are widely used to measure antenna parameters because of the free reflection conditions inside them. Recently, there has been increasing research into antennas working at frequencies from 20 to 70 GHz. Generalpurpose anechoic chambers are usually between 5 and 10 meters in size, which leads to free space distances longer than required at millimeter wave frequencies, and corresponding larger cables losses. Designing anechoic chambers tailored to such a frequency range would lead to minimum losses and improve measurement performance. If uncertainty is considered all the way from the design stage to operation, it will be easier to obtain highly accurate measurement outcomes. This paper focuses on the issues related to uncertainty in a tailor-made millimeter wave anechoic chamber at every step before achieving a fully functional measurement system. This includes setting the requirements for the chamber, calculating its dimensions, designing the structure and selecting the building materials, in order finally to characterize its performance by measuring the insulation from external signals and the ripple in the quiet zone. This process has resulted in a full description of design, construction and operation stages of an anechoic chamber from the point of view of the control on the measurement uncertainty. Index Terms-Anechoic chambers (electromagnetic), antenna testing, measurement uncertainty, millimeter waves. I. INTRODUCTION EASUREMENTS of antennas in the far field region are extensively performed in anechoic chambers as they provide a controlled environment free from reflections and undesirable external signals. In recent years, novel antenna designs at frequencies in the 20-70 GHz range have been developed [1]-[6]. General-purpose anechoic chambers for traditional measurements of antennas between 1 to 18 GHz have sizes between 5 and 10 meter [7], depending on the used range antennas and other design requirements. At such distances for the above frequencies, free space and test cable losses are high, making the received signal power too close to the receiver noise floor. Amplifiers can help overcome the Manuscript

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Section: )mentioning

confidence: 99%

Uncertainty Assessment of a Small Rectangular Anechoic Chamber: From Design to Operation

Expósito

Sánchez

Cuiñas

2020

IEEE Trans. Antennas Propagat.

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“…Bandwidth can be increased with structural alterations, such as addition of slots, fractals and monopole geometries, which are often associated with lower gain and efficiency [9]. On the other hand, antenna gain can be improved with a larger radiating area by using parasitic patches or arrays, which typically compromise on compactness due to a significant extend in the size and holds limited bandwidth [10]. The antenna elements of arrays are spaced apart to avoid mutual coupling and formation of grating lobes and are designed with a well-matched feeding network thus causing an additional increase in the overall area of a prototype.…”

Section: Introductionmentioning

confidence: 99%

Millimetre-Wave MIMO Array of a Compact Grid Antenna for 5G Wireless Networks and Beyond

Jilani

Abassi

Alomainy

2020

2020 International Conference on UK-China Emerging Technologies (UCET)

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This paper presents a 4-element multiple-inputmultiple-output (MIMO) configuration of planar and compact two-dimensional (2D) grid antennas. The proposed grid is a 2D array of thirteen circular patches each with a radius of 0.175λo, having a single feed point. Measured results of the singleelement microstrip-fed grid-array antenna show a 6 GHz bandwidth in the range of 27-33 GHz. The realized gain is above 9 dBi in almost the whole range with a peak gain of 11.57 dBi at 29 GHz. The numerically calculated antenna efficiency is above 80%. The transmission characteristics of the 4-element MIMO array are below-27 dB that indicates low mutual coupling and high isolation. These high-performance aspects of the proposed millimetre-wave (mm-wave) MIMO antenna array validate its potential for the 5 th generation (5G) cellular devices especially in indoor base-stations.

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“…e antenna arrays have diverse structures and flexible beam control. It is widely used in radar early warning, meteorology and hydrology, and wireless communication systems [1][2][3]. Compared with single antenna, antenna arrays make it easier to implement pencil beams, flat top beams, multibeams, and low side lobe patterns.…”

Section: Introductionmentioning

confidence: 99%

Pattern Synthesis of Time-Modulated Sparse Array by an OPM-CVX Algorithm

Liang

Jiang

Liu

et al. 2020

Mathematical Problems in Engineering

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This paper addresses the constrained multiobjective optimization problem of time-modulated sparse arrays. The synthesis objective is to find an optimal element arrangement and associated excitation strategy of sparse arrays, which realize the balance of radiation power and sideband suppression performance with minimum number of elements, and suppress side lobe level simultaneously. A novel hybrid algorithm based on orthogonal perturbation method and convex optimization (OPM-CVX) for the synthesis of time-modulated sparse antenna array is presented in this paper. In order to satisfy the main lobe beamforming and side lobe suppression of sparse arrays, the proposed method optimizes element positions with minimum array numbers by orthogonal perturbation method and optimizes excitations of array element with dynamic range ratio constraint by convex optimization. Furthermore, a trapezoidal pulse time-modulated switching function is proposed to find the balance of radiation power and sideband suppression performance. The numerical results indicate that the proposed algorithm can be an effective approach for synthesis problems of time-modulated sparse arrays.

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Broadband Proximity-Coupled Microstrip Planar Antenna Array for 5G Cellular Applications

Cited by 92 publications

References 14 publications

Uncertainty Assessment of a Small Rectangular Anechoic Chamber: From Design to Operation

Uncertainty Assessment of a Small Rectangular Anechoic Chamber: From Design to Operation

Millimetre-Wave MIMO Array of a Compact Grid Antenna for 5G Wireless Networks and Beyond

Pattern Synthesis of Time-Modulated Sparse Array by an OPM-CVX Algorithm

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