book

Low-cost Smart Antennas

by Qi Luo, Steven Shichang Gao, Chao Gu, Wei Liu

March 2019

Intermediate to advanced

288 pages

9h 24m

English

Wiley

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1.1 Introduction1.2 Antenna Fundamentals1.3 Antenna Array Fundamentals1.4 Smart Antenna Architecture and Hardware Implementation1.5 Overview of the BookReferences
2.1 Introduction2.2 Basic Concepts for Beamforming2.3 Fixed Beamformer Design2.4 Adaptive Beamforming Algorithms2.5 Blind Beamforming Algorithms2.6 Low‐cost Adaptive Beamforming2.7 Summary of the ChapterReferences
3.1 Introduction3.2 Theory and Operation Principle3.3 Low‐cost Folded‐monopole ESPAR3.4 ESPAR Antenna with Low Control Voltage3.5 Planar ESPAR Antennas3.6 Case Studies3.7 Summary of the ChapterReferences
4.1 Introduction4.2 FSS Fundamentals and Active FSSs4.3 Monopole‐fed Beam‐switching Antenna using AFSS4.4 Dual‐Band Beam‐Switching Antenna using AFSS4.5 3D Beam Coverage of Electronic Beam‐Switching Antenna using FSS4.6 Frequency‐agile Beam‐switchable Antenna4.7 Continuous Beam‐steering Antennas using FSSs4.8 Case Study4.9 Summary of the ChapterReferences
5.1 Introduction5.2 Reflectarray and Transmitarray Design Fundamentals5.3 Beam Reconfigurable Reflectarrays5.4 Beam Reconfigurable Transmitarray5.5 Circularly Polarised Beam‐steerable Reflectarrays and Transmitarrays5.6 Case Study5.7 Summary of the ChapterReferences
6.1 Introduction6.2 MIMO Antennas6.3 Compact MIMO Antenna with High Isolation6.4 Compact MIMO Antenna with Adaptive Radiation Patterns6.5 Case Studies6.6 Summary of the ChapterReferences

7.1 Introduction7.2 Lens Antennas7.3 Retrodirective Array Antenna7.4 Fabry–Perot Resonator Antennas7.5 Array‐fed Reflector7.6 Multibeam Antennas based on BFN7.7 Summary of the ChapterReferences

Content preview from Low-cost Smart Antennas

1Introduction to Smart Antennas

1.1 Introduction

Smart antennas, also known as intelligent antennas or adaptive arrays, are a key technology for advanced wireless systems, such as satellite communications, inter‐satellite links, radars, sensors, mobile communications (5G and beyond), wireless local area networks, global navigation satellite systems, and wireless power transfer. One of the most important features of smart antennas is electronic beam scanning or switching. Smart antennas enable wireless systems to achieve optimum performance and increase channel throughput by electronically steering maximum radiation towards the desired directions while forming nulls against interfering sources.

The adaptive array is ‘smart’ because it has signal processing units with smart signal processing algorithms. Recent years have seen the development of efficient algorithms for direction of arrival (DOA) estimation and adaptive beamforming. Algorithms for adaptive beamforming include the classical least mean squares (LMS) type algorithm, constant modulus algorithm (CMA) etc. Traditional smart antennas are, however, complicated in structure, bulky in size, and costly. Thus, it is highly desirable to reduce the size, mass, power consumption, and cost of smart antennas.

Generally speaking, smart antennas can be divided into three components: the antenna, the beamforming network (BFN), and the signal processing unit. It is believed that radio frequency (RF) designs such as the architecture design ...