Reduction of Crosstalk Between Dual Power Amplifiers Using Laser Treatment

A cost-effective isolation technique using laser treatment is proposed to suppress the undesired crosstalk between dual power amplifiers (PAs), which are essential to multiple-input multiple-output communications system. Laser treatment not only reduces the small-signal coupling between dual PAs but...

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Veröffentlicht in:	IEEE microwave and wireless components letters 2008-09, Vol.18 (9), p.602-604
Hauptverfasser:	Huan-Lin Chang, Kuo, P.-S., Hua, W.-C., Chun-Ping Lin, Che-Yung Lin, Liu, C.W.
Format:	Artikel
Sprache:	eng
Schlagworte:	Amplifiers Applied sciences Circuit properties Coupling Coupling circuits Crosstalk Electric, optical and optoelectronic circuits Electronic circuits Electronic equipment and fabrication. Passive components, printed wiring boards, connectics Electronics Exact sciences and technology isolation Joining Laser modes laser treatment Lasers Linearity Mathematical analysis Microwaves MIMO multiple input multiple output (MIMO) Noise levels Power amplifiers power amplifiers (PAs) Power generation Power lasers Radio frequency Wireless communication
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Beschreibung
Zusammenfassung:	A cost-effective isolation technique using laser treatment is proposed to suppress the undesired crosstalk between dual power amplifiers (PAs), which are essential to multiple-input multiple-output communications system. Laser treatment not only reduces the small-signal coupling between dual PAs but also enhances the linearity of the PA under dual-PA operation mode. The figure of merit for the small-signal coupling has an improvement of 4.55 dB at 2.45 GHz, and the output power at 3% (- 30 dB) error vector magnitude (EVM) has a linearity improvement of 6.1 dB under 0-dB interference.
ISSN:	1531-1309 2771-957X 1558-1764 2771-9588
DOI:	10.1109/LMWC.2008.2002456