Antenna Array Driven by Non-Isolated Power Amplifiers for MIMO Applications

Haijun Fan; Yuan Ding; George Goussetis; Maria Jesus Canavate Sanchez

doi:10.23919/EuMC.2019.8910845

Antenna Array Driven by Non-Isolated Power Amplifiers for MIMO Applications

Haijun Fan
, Yuan Ding
, George Goussetis
, Maria Jesus Canavate Sanchez

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

10 Citations (Scopus)

178 Downloads (Pure)

Abstract

In this paper, the effect of antenna coupling in an active array on the integrated power amplifiers (PAs) is studied. It is found that for multiple-input multiple-output (MIMO) applications some antenna elements inputs can experience negative impedance. When isolators between antennas and PAs are missing, which is preferable in highly integrated millimeter-wave (mm-Wave) massive MIMO transmitters due to the fact that isolators are bulky and integration-incompatible, this negative impedance can cause PA oscillating/damaged, or at least non-functional. This non-linear problem is studied theoretically using an example of a coupled antenna array driven by Doherty PAs. In addition, the experimental results validate the existence of the negative impedance and reveal its relationship with the array excitation and PA non-linearity.

Original language	English
Title of host publication	2019 49th European Microwave Conference (EuMC)
Publisher	IEEE
Pages	468-471
Number of pages	4
ISBN (Electronic)	9782874870552
DOIs	https://doi.org/10.23919/EuMC.2019.8910845
Publication status	Published - 25 Nov 2019
Event	2019 European Microwave Week - Paris, France Duration: 29 Sept 2019 → 4 Oct 2019

Conference

Conference	2019 European Microwave Week
Country/Territory	France
City	Paris
Period	29/09/19 → 4/10/19

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10.23919/EuMC.2019.8910845

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@inproceedings{4c32777d44c8478997901e6ce10f0d06,

title = "Antenna Array Driven by Non-Isolated Power Amplifiers for MIMO Applications",

abstract = "In this paper, the effect of antenna coupling in an active array on the integrated power amplifiers (PAs) is studied. It is found that for multiple-input multiple-output (MIMO) applications some antenna elements inputs can experience negative impedance. When isolators between antennas and PAs are missing, which is preferable in highly integrated millimeter-wave (mm-Wave) massive MIMO transmitters due to the fact that isolators are bulky and integration-incompatible, this negative impedance can cause PA oscillating/damaged, or at least non-functional. This non-linear problem is studied theoretically using an example of a coupled antenna array driven by Doherty PAs. In addition, the experimental results validate the existence of the negative impedance and reveal its relationship with the array excitation and PA non-linearity.",

author = "Haijun Fan and Yuan Ding and George Goussetis and \{Canavate Sanchez\}, \{Maria Jesus\}",

year = "2019",

month = nov,

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doi = "10.23919/EuMC.2019.8910845",

language = "English",

pages = "468--471",

booktitle = "2019 49th European Microwave Conference (EuMC)",

publisher = "IEEE",

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note = "2019 European Microwave Week ; Conference date: 29-09-2019 Through 04-10-2019",

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T1 - Antenna Array Driven by Non-Isolated Power Amplifiers for MIMO Applications

AU - Fan, Haijun

AU - Ding, Yuan

AU - Goussetis, George

AU - Canavate Sanchez, Maria Jesus

PY - 2019/11/25

Y1 - 2019/11/25

N2 - In this paper, the effect of antenna coupling in an active array on the integrated power amplifiers (PAs) is studied. It is found that for multiple-input multiple-output (MIMO) applications some antenna elements inputs can experience negative impedance. When isolators between antennas and PAs are missing, which is preferable in highly integrated millimeter-wave (mm-Wave) massive MIMO transmitters due to the fact that isolators are bulky and integration-incompatible, this negative impedance can cause PA oscillating/damaged, or at least non-functional. This non-linear problem is studied theoretically using an example of a coupled antenna array driven by Doherty PAs. In addition, the experimental results validate the existence of the negative impedance and reveal its relationship with the array excitation and PA non-linearity.

AB - In this paper, the effect of antenna coupling in an active array on the integrated power amplifiers (PAs) is studied. It is found that for multiple-input multiple-output (MIMO) applications some antenna elements inputs can experience negative impedance. When isolators between antennas and PAs are missing, which is preferable in highly integrated millimeter-wave (mm-Wave) massive MIMO transmitters due to the fact that isolators are bulky and integration-incompatible, this negative impedance can cause PA oscillating/damaged, or at least non-functional. This non-linear problem is studied theoretically using an example of a coupled antenna array driven by Doherty PAs. In addition, the experimental results validate the existence of the negative impedance and reveal its relationship with the array excitation and PA non-linearity.

U2 - 10.23919/EuMC.2019.8910845

DO - 10.23919/EuMC.2019.8910845

M3 - Conference contribution

SP - 468

EP - 471

BT - 2019 49th European Microwave Conference (EuMC)

PB - IEEE

T2 - 2019 European Microwave Week

Y2 - 29 September 2019 through 4 October 2019

ER -

Antenna Array Driven by Non-Isolated Power Amplifiers for MIMO Applications

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