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 proceedingConference contribution

3 Citations (Scopus)
102 Downloads (Pure)


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 languageEnglish
Title of host publication2019 49th European Microwave Conference (EuMC)
Number of pages4
ISBN (Electronic)9782874870552
Publication statusPublished - 25 Nov 2019
Event2019 European Microwave Week - Paris, France
Duration: 29 Sept 20194 Oct 2019


Conference2019 European Microwave Week


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