access icon free Offset mesh in FPCB for better impedance control

© The Institution of Engineering and Technology
Received 03/04/2018, Published 24/05/2018

Meshed ground planes have been used in a flexible printed circuit board (FPCB) to raise the characteristic impedance of a stripline to 50 Ω. However, the characteristic impedance varies considerably with its position on the meshes. An offset mesh structure is proposed to address this issue. Both simulation and measurement results verify its effectiveness.

Inspec keywords: printed circuits; flexible electronics; strip lines

Other keywords: resistance 50 ohm; offset mesh structure; flexible printed circuit board; stripline; characteristic impedance; impedance control; meshed ground planes; FPCB

Subjects: Waveguides and microwave transmission lines; Printed circuits

References

    1. 1)
      • 2. Wu, S., Shi, H., Herndon, M., et al: ‘Modeling and analysis of a trace referenced to a meshed ground plane’. IEEE EMC Symp., Long Beach, CA, USA, August 2011, pp. 137–141, doi: 10.1109/ISEMC.2011.6038298.
    2. 2)
      • 1. Shimada, O., Ito, K., Miyagi, T., et al: ‘Electrical properties of a multilayer thin film substrate for multichip packages’. EMT Symp., Nara, Japan, August 1989, pp. 121–127, doi: 10.1109/IEMTS.1989.76121.
    3. 3)
      • 3. Lee, H., Kim, J.: ‘Electrical characteristics of single and coupled stripline on meshed ground plane in high-speed package’. EMAP, Jeju, Korea, November 2001, pp. 261–267, doi: 10.1109/EMAP.2001.983995.
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.1157
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