Update README.md

README.md

@@ -5,6 +5,8 @@ range and with low noise figure. In addition, the PGA-103+ has good input and ou
 external matching components and has demonstrated excellent reliability. It has repeatable performance from lot to lot and is enclosed in a SOT-89
 package for very good thermal perfor.
 
+The PCB dimensions are optimized for shield case [KVT231](http://www.ges.cz/cz/kvt-231-GES07203877.html).
+
 ***
 ### Schematic
 ![Schematic](HW/LNA_v1.0_sch.png)