Compact multi-layer microstrip Rotman lens design using coupling slots to support millimetre wave devices

Millimetre wave technology is now considered as a key component for the next generation (5G) of cellular networks since they offer higher data rates and broader bandwidth compared to the current technology. However, since communication in this frequency band suffers higher propagation loss and atmos...

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Bibliographic Details
Published in:IET microwaves, antennas & propagation antennas & propagation, 2018-07, Vol.12 (8), p.1260-1265
Main Authors: Vo Dai, Toan K, Nguyen, Tuan, Kilic, Ozlem
Format: Article
Language:English
Subjects:
5G cellular networks
5G mobile communication
analogue beamforming networks
array signal processing
atmospheric absorption
beamforming networks
cellular radio
compact multilayer microstrip Rotman lens design
conventional Rotman lens
coupling slots
directional antennas
electronic scanning
lens antennas
linear antenna arrays
linear array antennas
loss compensation
microstrip antenna arrays
millimetre wave antenna arrays
millimetre wave devices
millimetre wave propagation
millimetre wave technology
next generation cellular networks
planar structure
propagation loss
Research Article
transceiver system
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Summary:Millimetre wave technology is now considered as a key component for the next generation (5G) of cellular networks since they offer higher data rates and broader bandwidth compared to the current technology. However, since communication in this frequency band suffers higher propagation loss and atmospheric absorption (∼12 dB/km), the use of highly directional antennas plays an important role in order to compensate for these losses. Therefore, it is necessary to design beamforming networks that are not only able to support these antennas but also offer practical and compact solutions to be placed in any modern transceiver system. Rotman lenses have long been used as analogue beamforming networks to support linear array antennas for electronic scanning. Their broad bandwidth and planar structure make them ideal for these types of applications. However, their overall dimensions can be prohibitively large, especially for systems requiring large scan angles. In this study, the authors propose a new compact configuration that reduces the overall dimensions of the conventional Rotman lens by as much as 50% without degrading its performance.
ISSN:1751-8725
1751-8733
1751-8733
DOI:10.1049/iet-map.2017.0817