Characterizations of Mutual Coupling Effects on Switch-Based Phased Array Antennas for 5G Millimeter-Wave Mobile Communications
Artikel i vetenskaplig tidskrift, 2019

The fifth generation (5G) millimeter-wave (mmWave) handset demands a cost-effective mmWave array antenna with beam steering capability to overcome the high-pass loss and to ensure seamless connectivity. Unlike sub-6-GHz handsets, emerging mmWave handsets usually employ phased array antennas with a reasonably large number of elements. Unfortunately, due to the legacy of a few antennas in sub-6-GHz handsets, the mutual coupling effect on the mmWave handset has not been thoroughly investigated. In this paper, we study the mutual coupling effect on the mmWave handset performance by comparing array antennas with different inter-element spacing and different configurations. It is found that mutual coupling tends to increase the active reflection (especially at large scanning angles), which in turn reduces the realized gain and maximum scanning angle of the phased array antenna. For a sub-6-GHz multiple-input multiple-output handset with two or four antenna ports and fully digital precoding/decoding, 10-dB isolation is usually regarded as good enough. It is shown in this paper, however, that the outage capacity of the mmWave handset can be clearly improved by reducing the mutual coupling.

Phased arrays

millimeter-wave (mmWave)

Mutual coupling

5G mobile communication

handset array

Telephone sets


Array signal processing

multiple-input multiple-output (MIMO)

Active reflection

mutual coupling


Chen Xiaoming

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Antennsystem

Muhammad Abdullah

Qinlong Li

Jianxing Li

Anxue Zhang

Tommy Svensson

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

IEEE Access

2169-3536 (ISSN)

Vol. 7 31376-31384




Annan elektroteknik och elektronik



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