Abstract The increased demand for user device connectivity has led to spectral congestion which is driving exploration of higher frequency spectrum, such as millimetre wave frequencies. As millimetre wave propagation is predominantly line‐of‐sight, shadowing becomes prevalent in indoor environments due to obstructions from clutter. Accordingly, there is a need to find solutions which can provide additional coverage. In this work, octant‐shaped spherical reflectors are deployed in small office environments with varying degrees of clutter to provide additional ray paths to improve millimetre wave coverage into shadow regions. Cost weightings have been allocated to prioritise regions of high importance and are used to compare reflector deployment strategies. Appropriate positioning of reflectors in the environment is shown to improve coverage into shadow regions in all three environments considered, with placement in the top corners of a room found to be a valid solution. In densely cluttered environments, more than one reflector may be required to provide sufficient coverage. Reducing the reflector radius by 0.1 m has been shown to increase reflected power by up to 6 dB in some cases.

Priya A. Qualtrough‐Mittal

Michael J. Neve

Andrew C. M. Austin

IET Microwaves Antennas & Propagation

Topics include, but are not limited to:

Microwave circuits including RF, microwave and millimetre-wave amplifiers, oscillators, switches, mixers and other components implemented in monolithic, hybrid, multi-chip module and other technologies. Papers on passive components may describe transmission-line and waveguide components, including filters, multiplexers, resonators, ferrite and garnet devices. For applications, papers can describe microwave sub-systems for use in communications, radar, aerospace, instrumentation, industrial and medical applications. Microwave linear and non-linear measurement techniques.

Antenna topics including designed and prototyped antennas for operation at all frequencies; multiband antennas, antenna measurement techniques and systems, antenna analysis and design, aperture antenna arrays, adaptive antennas, printed and wire antennas, microstrip, reconfigurable, conformal and integrated antennas.

Computational electromagnetics and synthesis of antenna structures including phased arrays and antenna design algorithms.

Radiowave propagation at all frequencies and environments.

Current Special Issue. Call for papers: 
Metrology for 5G Technologies - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf

This journal covers topics including, but not limited to:

Microwave circuits, which encompass RF, microwave, and millimeter-wave amplifiers, oscillators, switches, mixers, and other components implemented in monolithic, hybrid, multi-chip module, and other technologies. Papers on passive components may describe transmission line and waveguide components, including filters, multiplexers, resonators, ferrite, and garnet devices. For applications, papers can describe microwave subsystems for use in communications, radar, aerospace, instrumentation, industrial, and medical applications. Microwave linear and non-linear measurement techniques.

Antenna topics include designed and prototyped antennas for operation at all frequencies; multiband antennas, antenna measurement techniques and systems, antenna analysis and design, aperture antenna arrays, adaptive antennas, printed and wire antennas, microstrip, reconfigurable, conformal, and integrated antennas.

Computational electromagnetics and synthesis of antenna structures, including phased arrays and antenna design algorithms.

Radiowave propagation at all frequencies and environments.

Current Special Issue: Call for papers:
Metrology for 5G Technologies - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf

本期刊涵盖的主题包括但不限于：

微波电路，包括射频、微波和毫米波放大器、振荡器、开关、混频器及其他在单片、混合、多个芯片模块及其他技术中实现的组件。关于被动组件的论文可以描述传输线和波导组件，包括滤波器、多路复用器、谐振器、铁氧体和石榴石器件。应用方面的论文可以描述用于通信、雷达、航空航天、仪器、工业和医疗应用的微波子系统。微波线性和非线性测量技术。

天线主题包括为所有频率设计和原型制作的天线；多频带天线、天线测量技术和系统、天线分析与设计、孔径天线阵列、自适应天线、印刷和线状天线、微带天线、可重构天线、符合性天线和集成天线。

计算电磁学和天线结构的合成，包括相控阵列和天线设计算法。

在所有频率和环境下的无线电波传播。

当前特刊：征稿启事：
5G技术的计量 - https://digital-library.theiet.org/files/IET_MAP_CFP_M5GT_SI2.pdf

Category	Quartile
计算机科学	4
计算机科学, 工程电子与电气	4
计算机科学, 电信学	4

Improving coverage of indoor millimetre wave systems using spherical reflectors

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