diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -29,6 +29,7 @@ You need a few things:
 - Calibration standard
   - Ideally something with s-parameters measured on a better VNA
   - I have used a basic SMA load and two modified SMA jacks with decent results
+    ![calibration standard](img/calibration_standard.jpg)
 
 ### Pluto Configuration
 
diff --git a/img/calibration_standard.jpg b/img/calibration_standard.jpg
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Binary files /dev/null and b/img/calibration_standard.jpg differ