Imported from GitHub: bvernoux/EMC_5uH_LISN · commit 6902829 · license MIT

Description

Open Source Hardware Dual 5µH LISN(Line Impedance Stabilization Network)

README

5µH LISN(Line Impedance Stabilization Network)

Open Source Hardware Dual 5µH DC LISN with 10dB Attenuator and Transient Limiter for Spectrum Analyzer EMC work.

A LISN is a Line Impedance Stabilization Network used in conducted emissions testing.

The AIM of this Dual LISN is to be used for EMC pre-testing with frequency range 30kHz(or lower) to 110MHz(or up to 150MHz or more).

This open source hardware LISN V1 R0 include following features:

• Designed with fully open source tools like KiCad 5.99 Nightly

• Improvement in this design:

  • Added simulation with LTSpice of the 10dB Attenuator / Transient Filter (with default 1N4148 and BAV99 see Simu dir)
  • Modified Supply & DUT "+ GND -" to be separated by 19.06mm for 4mm BANANA JACK for BNC adapter
  • Use BAV99 instead of 1N4148W Diodes (improve 10dB Attenuator and Transient Limiter to be flat up to >200MHz)
  • Replace Keystone 575-4 by Keystone 575-8 (as the 575-4 was too short)
  • Added more via for better thermal transfer/decoupling around capacitors ...

• Dual LISN in one aluminum box(Hammond 1590B)

  • Maximum current: 5A
  • Nominal operating voltage range: 0V to 60V DC
  • Include 10dB Attenuator and Transient Limiter for each SMA connector to be connected to a Spectrum Analyzer
    • Max. 1W / 30dBm if 50°C Temperature raise is allowed
    • The Transient limiter is a 9kHz HP filter, which is also a dc block.

This work is heavily based on work from others mainly Jay_Diddy_B & Noy from EEVBLOG forum.

See all links related to the original Dual 5µH LISN:

• https://www.eevblog.com/forum/projects/5uh-lisn-for-spectrum-analyzer-emcemi-work/75/
• https://www.eevblog.com/forum/projects/5uh-lisn-for-spectrum-analyzer-emcemi-work/msg3420102/#msg3420102

Video related to EMC Conducted Emissions / LISN:

• Rohde Schwarz video Understanding LISNs:
  • This video explains the design and function of a LISN (line impedance stabilization network) and how LISNs are used in conducted EMC testing.
  • https://www.youtube.com/watch?v=QPJzp66Yvzs
• EMC Conducted Emissions: How to connect and set up a LISN:
  • In this video Dr. Ali Shirsavar shows how you can connect and set up a LISN ready for pre-compliance testing of EMC conducted emissions.
  • https://www.youtube.com/watch?v=28oDdL9RnWM