# Coplanar SE 50 Ohms trace **URL:** \ **Category:** ℹ️ Q & A Help Zone\ **Tags:** pcb-design, beautiful-boards\ **Created:** [March 31, 2026, 10:20am UTC](https://community.aisler.net/t/coplanar-se-50-ohms-trace/5578 "2026-03-31T10:20:10Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![thomas-perraton1-oca](https://community-cdn.aisler.net/letter_avatar_proxy/v4/letter/t/0ea827/32.png) [@thomas-perraton1-oca](https://community.aisler.net/u/thomas-perraton1-oca)\ **Post date:** [March 31, 2026, 10:20am UTC](https://community.aisler.net/t/coplanar-se-50-ohms-trace/5578/1 "2026-03-31T10:20:11Z")
Hello, I intend to use a 50 Ohms coplanar waveguide for a short 2.4GHz trace on a 1.6mm 4 layer board. Would you know finer sizings than what Saturn PCB can provide ? Many thanks. ---
**Author:** ![Sarah-from-AISLER](https://community-cdn.aisler.net/user_avatar/community.aisler.net/sarah-from-aisler/32/2193_2.png) [@Sarah-from-AISLER](https://community.aisler.net/u/Sarah-from-AISLER)\ **Post date:** [September 29, 2026, 1:44pm UTC](https://community.aisler.net/t/coplanar-se-50-ohms-trace/5578/2 "2026-09-29T13:44:32Z")
Hey @thomas-perraton1-oca, I’m sorry nobody got back to you sooner. The layer build-up for your board is here: [4 Layers 1.6mm 35µm stackup](https://community.aisler.net/t/4-layers-1-6mm-35-m-stackup/5457). It lists track widths for standard single-ended tracks and differential pairs, but not for coplanar structures. If your design depends on a defined impedance, get in touch via [support@aisler.net](mailto:support@aisler.net) before you order, and we’ll look at what’s possible for you. ---
**Author:** ![Sarah-from-AISLER](https://community-cdn.aisler.net/user_avatar/community.aisler.net/sarah-from-aisler/32/2193_2.png) [@Sarah-from-AISLER](https://community.aisler.net/u/Sarah-from-AISLER)\ **Post date:** [September 29, 2026, 1:44pm UTC](https://community.aisler.net/t/coplanar-se-50-ohms-trace/5578/3 "2026-09-29T13:44:35Z")