Effective electromagnetic shielding of plastic packaging in low-cost optical transceiver modules

Author

Wu, Tzong-Lin ; Jou, Wern-Shiarng ; Dai, S.G. ; Cheng, Wood-Hi

Author_Institution

Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan

Volume

21

Issue

6

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

1536

Lastpage

1543

Abstract

A low-cost plastic package of the standard 1 × 9 type with effective electromagnetic (EM) shielding ability is developed. Optical transceiver modules with transmission rates of 155 Mb/s and 1.25 Gb/s are tested to evaluate the EM shielding against emitted radiation from the plastic packaging. The results show that the packaged optical transceiver modules exhibit shielding effectiveness (SE) of over 20 dB. The EM shielding properties of plastic materials consisting of nylon66 and liquid crystal polymer (LCP) with carbon fiber reinforced are investigated. The effects of weight percentage of fibers, carbon fiber length, and material thickness on the SE of the plastic composites are studied both from the plane-wave and near-field sources approaches. The packaged plastic optical transceiver modules with their good SE are suitable for use in low-cost and low electromagnetic interference (EMI) Gigabit Ethernet lightwave transmission systems.

Keywords

electromagnetic shielding; liquid crystal polymers; modules; optical fibre LAN; optical receivers; optical transmitters; packaging; plastics; transceivers; 1.25 Gbit/s; 155 Mbit/s; EM shielding; EM shielding properties; Gigabit Ethernet lightwave transmission systems; carbon fiber; carbon fiber length; effective electromagnetic shielding; effective electromagnetic shielding ability; electromagnetic interference; liquid crystal polymer; low-cost optical transceiver modules; material thickness; near-field sources; optical transceiver modules; packaged optical transceiver modules; plane-wave sources; plastic composites; plastic optical transceiver modules; plastic packaging; transmission rates; weight percentage; Carbon dioxide; Crystalline materials; Electromagnetic radiation; Electromagnetic shielding; Optical materials; Optical polymers; Organic materials; Plastic packaging; Stimulated emission; Transceivers;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2003.810087

Filename

1216193