Design of a Phased Array in Triangular Grid With an Efficient Matching Network and Reduced Mutual Coupling for Wide-Angle Scanning

Arand, Bijan Abbasi; Bazrkar, Amir; Zahedi, Amir

doi:10.1109/tap.2017.2690903

Cited by 56 publications

(9 citation statements)

References 21 publications

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“…This property is very important because it can create a smart radio environment, increase the signal-to-noise ratio, increase energy efficiency, etc. Generally, phased array antennas are used to send the beam in the desired direction [74][75][76][77][78]. However, the phased array antenna is expensive and it needs lots of power to operate.…”

Section: Introductionmentioning

confidence: 99%

Review Paper on Hardware of Reconfigurable Intelligent Surfaces

2023

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Recently reconfigurable intelligent surface (RIS) has attracted great attention because it can create a smart wireless environment. Hence it can enhance the capacity and coverage of the wireless network significantly. A thorough review of RISs has been presented in this paper focusing on the hardware aspect of the RIS. Beyond-5G/6G communication will have a smart propagation environment, where RIS can be used for such communications. RIS consists of various small unit cells. The unit cells should have some tunning mechanism so that the incoming waves can be reflected or transmitted in the desired direction. It is possible to tune the impedance of the unit cells using PIN diodes, varactor didoes, microelectromechanical (MEMS), thermal, and other ways. In this paper, initially, the background of RIS has been discussed where RIS is going to play a significant role in beyond-5G/6G communications. We have also added the theoretical background of RIS and motivations to writing this paper. After that several published papers in the literature have been presented so that the readers can get an overall idea about the RIS and its hardware. Hence, this paper will be very useful for practitioner engineers and researchers. RISs have been presented in various tables and various parameters have been presented. We have discussed challenges and solutions for the hardware of the RIS design. We have also discussed potential research and research gap that can be explored in the future. Lastly, we have added a conclusion for this review paper.INDEX TERMS Reconfigurable intelligent surface (RIS), beyond-5G/6G communication, reflectarray, PIN diode, varactor diode.

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Section: Introductionmentioning

confidence: 99%

Review Paper on Hardware of Reconfigurable Intelligent Surfaces

2023

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“…When dealing with single functions in active mode, Pozar [27] used the active reflection coefficient (ARC) as a metric for assessing phased array performance, whereas [28] applied the active input impedance of the elements as a function of scanning angle.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Active Reflection Coefficient and Radiated Fields on a Co-Located Mimo Radar System in Transmit Mode

Colon-Diaz¹,

Janning²

2022

PIER M

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A study of the impact of coupling effects in a co-located multiple input multiple output (MIMO) radar system is presented. Predicted and measured results corroborate that the active reflection coefficient (ARC) and beampatterns are impacted by the excitation of each sub-array, the geometric configuration, and their polarization. A uniform linear array (ULA) and a uniform planar array (UPA) layouts are considered. The excitations used in the study are linear frequency modulation (LFM) and Doppler division multiple access (DDMA). A thorough analysis is presented to understand the effects these parameters have on the ARC and on the beampatterns of the radar system.

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“…A single polarised planar patch array in triangular grid is presented in [16], the frequency bandwidth and polarisation capability are both limited due to the nature of the antenna structure. On the contrary to the concept of ORA design, considerable efforts have been made to mitigate the mutual coupling among the patch elements in the planar patch array in [16]. Nevertheless, research evidence on antenna arrays of a triangular grid with ultra‐wide bandwidth and dual polarisation are still scarce.…”

Section: Introductionmentioning

confidence: 99%