Reduction of Crosstalk Between Dual Power Amplifiers Using Laser Treatment

Author

Chang, Huan-Lin ; Kuo, P.-S. ; Hua, W.-C. ; Lin, Chun-Ping ; Lin, Che-Yung ; Liu, C.W.

Author_Institution

Dept. of Electr. Eng. & Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei

Volume

18

Issue

9

fYear

2008

Firstpage

602

Lastpage

604

Abstract

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.

Keywords

MIMO communication; crosstalk; power amplifiers; cost-effective isolation technique; crosstalk reduction; dual power amplifiers; error vector magnitude; frequency 2.45 GHz; laser treatment; multiple-input multiple-output communications system; Coupling circuits; Crosstalk; Laser modes; Linearity; MIMO; Power amplifiers; Power generation; Power lasers; Radio frequency; Wireless communication; Coupling; crosstalk; isolation; laser treatment; multiple input multiple output (MIMO); power amplifiers (PAs);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.2002456

Filename

4624620