STEERABLE TOROIDAL BIFOCAL LENS-ARRAY ANTENNA IN 57–64 GHZ RANGE

Introduction. Currently, one of the most promising approaches of the 5th generation mobile wireless systems development is the deployment of heterogeneous networks based on existing LTE cellular systems with large and small cells. The main elements of such networks can be small low cost relay stations equipped with highly directional steerable antenna systems to connect small cells with LTE base station serving macrocell. Objective. Existing solutions are either too expensive or not allowing flexible rearrangement of current information transmission lines. The objective of this work is to develop antenna equipment for low cost relay stations based on simple steerable antenna systems of millimetre wavelength (57-64 GHz), which allow beamsteering in both azimuth and elevation planes. Methods and materials. The developed steerable bifocal lens antenna system is a lens of a special shape made of a high molecular weight polyethylene and integrated with a phased array antenna. A key feature of the designed antenna system is a wide-angle beamsteering in the azimuth plane and ability to adjust the beam in the elevation plane. The calculation of the lens profiles was carried out by means of an approximation of geometrical optics in Matlab, and the main technical characteristics of the lens antenna system were obtained by direct electromagnetic modelling in CST Microwave Studio. Results. The prototype of the steerable bifocal lens-array antenna system is developed and its characteristics are studied. The following technical characteristics are achieved in the 57–64 GHz range: beamsteering in the elevation plane is ±3º, beamsteering in the azimuth plane is ±40º, and antenna gain is from 20 to 27.5 dBi for all angles. Conclusion. It was shown that the developed antenna system can be successfully used as receiving and transmission antenna equipment of small relay stations that transmit information in the frequency range of 57-64 GHz over a distance of 100-300 m.

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A Compact Ku-Band Active Electronically Steerable Antenna with Low-Cost 3D T/R Module

Wireless Communications and Mobile Computing ◽

10.1155/2019/5287679 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8

Author(s):

Zheng Xu ◽

Chengxiang Hao ◽

Kuiwen Xu ◽

Shichang Chen

Keyword(s):

Antenna Array ◽

System Integration ◽

Low Cost ◽

Axial Ratio ◽

Antenna System ◽

Measurement Results ◽

Steerable Antenna ◽

Vertical Interconnection ◽

Electronic Steering ◽

Ku Band

This paper presents a novel compact Ku-band active electronically steerable antenna array design with a low-cost and integrated T/R 3D module employed for airborne synthetic aperture radar (SAR) systems. The entire system adopts 3D multilayer technology with vertical interconnection to construct the hermetically packaging RF modules. By assembling different multifunctional modules into a whole multilayer board, the 3D T/R technique greatly improves the system integration and reduces implementation cost and size. Besides, a wideband circular polarized antenna array was designed in LTCC and connected to the proposed T/R modules to form a complete AESA. The whole proposed antenna system has been fabricated and experimentally investigated. Measurement results showed very good phased array performances in terms of gain, axial ratio, and radiating patterns. The low-cost, lightweight, and low-power features exhibited by the proposed design validate its applicability for weight and power constrained platforms with great electronic steering ability.

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A 10- to 21-GHz, low-cost, multifrequency, and full-duplex phased-array antenna system

IEEE Transactions on Antennas and Propagation ◽

10.1109/tap.2002.1011230 ◽

2002 ◽

Vol 50 (5) ◽

pp. 641-650 ◽

Cited By ~ 25

Author(s):

Tae-Yeoul Yun ◽

Chunlei Wang ◽

P. Zepeda ◽

C.T. Rodenbeck ◽

M.R. Coutant ◽

...

Keyword(s):

Phased Array ◽

Low Cost ◽

Antenna System ◽

Array Antenna ◽

Full Duplex ◽

Phased Array Antenna

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A real-time/low-cost DOA estimation system based on Rotman lens array antenna

2016 IEEE 5th Asia-Pacific Conference on Antennas and Propagation (APCAP) ◽

10.1109/apcap.2016.7843109 ◽

2016 ◽

Cited By ~ 1

Author(s):

Yan-Yun Lin ◽

Wen-Jiao Liao

Keyword(s):

Real Time ◽

Low Cost ◽

Doa Estimation ◽

Array Antenna ◽

Lens Array ◽

Estimation System

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Limited Feedback Precoding for Massive MIMO

International Journal of Antennas and Propagation ◽

10.1155/2013/416352 ◽

2013 ◽

Vol 2013 ◽

pp. 1-9 ◽

Cited By ~ 16

Author(s):

Xin Su ◽

Jie Zeng ◽

Jingyu Li ◽

Liping Rong ◽

Lili Liu ◽

...

Keyword(s):

Massive Mimo ◽

Large Scale ◽

Multiple Input Multiple Output ◽

Limited Feedback ◽

Antenna System ◽

Base Station ◽

Array Antenna ◽

Codebook Design ◽

Input Multiple Output ◽

Scenarios Simulation

The large-scale array antenna system with numerous low-power antennas deployed at the base station, also known as massive multiple-input multiple-output (MIMO), can provide a plethora of advantages over the classical array antenna system. Precoding is important to exploit massive MIMO performance, and codebook design is crucial due to the limited feedback channel. In this paper, we propose a new avenue of codebook design based on a Kronecker-type approximation of the array correlation structure for the uniform rectangular antenna array, which is preferable for the antenna deployment of massive MIMO. Although the feedback overhead is quite limited, the codebook design can provide an effective solution to support multiple users in different scenarios. Simulation results demonstrate that our proposed codebook outperforms the previously known codebooks remarkably.

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