Multi-Band Patch Antenna Array for Out-of-Band Aided Millimeter Wave Communication
Faruk Pasic, Jure Sokli\v{c}, Robert Langwieser, Stefan Schwarz, Christoph F. Mecklenbr\"auker

TL;DR
This paper investigates the impact of colocating millimeter wave and sub-6 GHz antenna arrays on each other's radiation patterns, demonstrating that such configurations cause minimal performance degradation through simulations and measurements.
Contribution
It provides an analysis of co-located multi-band antenna arrays, showing that mmWave structures have negligible effects on sub-6 GHz radiation characteristics.
Findings
The presence of the mmWave antenna structure has a minor impact on sub-6 GHz radiation patterns.
Simulations and measurements confirm negligible performance degradation in co-located configurations.
Abstract
Future wireless communication systems will integrate both sub-6 GHz and millimeter wave (mmWave) frequency bands within multi-antenna architectures to meet the increasing demand for high data rates. In such multi-band systems, reliable information obtained from the sub-6 GHz band can be exploited to support communication at mmWave frequencies. To ensure that both systems experience similar multi-path propagation effects, the sub-6GHz and mmWave antenna arrays have to be colocated and precisely aligned. However, such a configuration may adversely alter the radiation characteristics of the arrays, potentially degrading their performance. In this paper, we investigate the impact of positioning a mmWave antenna structure in front of a sub-6 GHz antenna structure. Through both simulations and measurements, we evaluate how the presence of the mmWave structure affects the radiation pattern of…
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