https://github.com/bvernoux/emc_5uh_lisn

Open Source Hardware Dual 5µH LISN(Line Impedance Stabilization Network)
https://github.com/bvernoux/emc_5uh_lisn

Last synced: 3 months ago
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Open Source Hardware Dual 5µH LISN(Line Impedance Stabilization Network)

• Host: GitHub
• URL: https://github.com/bvernoux/emc_5uh_lisn
• Owner: bvernoux
• License: mit
• Created: 2021-09-01T17:17:10.000Z (almost 4 years ago)
• Default Branch: master
• Last Pushed: 2023-09-14T17:20:32.000Z (over 1 year ago)
• Last Synced: 2025-03-11T11:09:59.735Z (3 months ago)
• Language: AGS Script
• Size: 925 KB
• Stars: 19
• Watchers: 3
• Forks: 6
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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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](https://en.wikipedia.org/wiki/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](https://www.kicad.org)

* 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.

![picture of 5uH_LISN_V1_R0_Top](./5uH_LISN_V1_R0_Top.png)

![picture of 5uH_LISN_V1_R0_Bottom](./5uH_LISN_V1_R0_Bottom.png)

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