scholarly journals Review of Recent Phased Arrays for Millimeter-Wave Wireless Communication

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3194 ◽  
Author(s):  
Aqeel Naqvi ◽  
Sungjoon Lim
Keyword(s):  
Wireless Communication ◽  
Millimeter Wave ◽  
Communication Systems ◽  
Phased Arrays ◽  
Path Loss ◽  
Directional Antennas ◽  
Base Stations ◽  
Wireless Communication Systems ◽  
Data Traffic ◽  
System Architectures

Owing to the rapid growth in wireless data traffic, millimeter-wave (mm-wave) communications have shown tremendous promise and are considered an attractive technique in fifth-generation (5G) wireless communication systems. However, to design robust communication systems, it is important to understand the channel dynamics with respect to space and time at these frequencies. Millimeter-wave signals are highly susceptible to blocking, and they have communication limitations owing to their poor signal attenuation compared with microwave signals. Therefore, by employing highly directional antennas, co-channel interference to or from other systems can be alleviated using line-of-sight (LOS) propagation. Because of the ability to shape, switch, or scan the propagating beam, phased arrays play an important role in advanced wireless communication systems. Beam-switching, beam-scanning, and multibeam arrays can be realized at mm-wave frequencies using analog or digital system architectures. This review article presents state-of-the-art phased arrays for mm-wave mobile terminals (MSs) and base stations (BSs), with an emphasis on beamforming arrays. We also discuss challenges and strategies used to address unfavorable path loss and blockage issues related to mm-wave applications, which sets future directions.

scholarly journals Design of True Time Delay Millimeter Wave Beamformers for 5G Multibeam Phased Arrays

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1331 ◽  
Author(s):  
Dimitrios I. Lialios ◽  
Nikolaos Ntetsikas ◽  
Konstantinos D. Paschaloudis ◽  
Constantinos L. Zekios ◽  
Stavros V. Georgakopoulos ◽  
...  
Keyword(s):  
Time Delay ◽  
Millimeter Wave ◽  
Communication Systems ◽  
Phased Arrays ◽  
High Capacity ◽  
Wireless Systems ◽  
Base Stations ◽  
Small Cells ◽  
True Time Delay ◽  
True Time

Millimeter wave (mm-Wave) technology is likely the key enabler of 5G and early 6G wireless systems. The high throughput, high capacity, and low latency that can be achieved, when mm-Waves are utilized, makes them the most promising backhaul as well as fronthaul solutions for the communication between small cells and base stations or between base stations and the gateway. Depending on the channel properties different communication systems (e.g., beamforming and MIMO) can accordingly offer the best solution. In this work, our goal is to design millimeter wave beamformers for switched beam phased arrays as hybrid beamforming stages. Specifically, three different analog beamforming techniques for the frequency range of 27–33 GHz are presented. First, a novel compact multilayer Blass matrix is proposed. Second, a modified dummy-ports free, highly efficient Rotman lens is introduced. Finally, a three-layer true-time-delay tree topology inspired by microwave photonics is presented.

scholarly journals Development of Frequency Modulated Array Antennas for Millimeter-Wave Communications

2019 ◽  
Vol 2019 ◽  
pp. 1-15
Author(s):  
Shaddrack Yaw Nusenu
Keyword(s):  
Millimeter Wave ◽  
Communication Systems ◽  
High Capacity ◽  
Path Loss ◽  
Directional Antennas ◽  
Phase Shifters ◽  
Research Progress ◽  
Massive Growth ◽  
Array Antennas ◽  
Point To Point

With the massive growth of wireless data in mobile broadband communications, millimeter-wave (mm-wave) communication is an alternative enabling technique for fifth generation (5G) wireless communication systems. More importantly, mm-wave offers large frequency spectrum bands ranging from 30GHz to 300GHz that can be utilized to provide very high capacity (i.e., multigigabits per-second data rates). Moreover, because of the small wavelength at mm-wave frequencies, we can exploit large antenna elements in a small physical area, meaning beamforming schemes are feasible. Nevertheless, high directional antennas should be used due to overcoming the severe path loss and absorption in mm-wave frequencies. Further, the antennas should be steerable in angle and range directions to support point-to-point (multipoint) communications. So far, mm-wave communication has utilized phased-array antennas arrangement which is solely angle dependent. This review paper presents recent array technology, namely, frequency modulated frequency diverse array (FDA) for mm-wave communication applications with an emphasis on beamforming. In FDA, small frequency increment is added across the elements. In doing so, an array beam is generated which is angle-range-time dependent without the need of phase shifters. This feature has several promising potentials in mm-wave communications. In this review, the object is to bring to the fore this advance FDA technology to mm-wave communications community to call for more investigations. We review FDA research progress up to date and highlight the potential applications in mm-wave communications.

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