diff --git a/user_libs/antennas.py b/user_libs/antennas.py
index b37861f6..9ae15bbb 100644
--- a/user_libs/antennas.py
+++ b/user_libs/antennas.py
@@ -28,10 +28,21 @@ def antenna_like_GSSI_1500(x, y, z, resolution=0.001, **kwargs):
     bowtieheight = 0.014
     patchheight = 0.015
     
-    excitationfreq = 1.5e9 # GHz
-    # excitationfreq = 1.71e9 # Value from http://hdl.handle.net/1842/4074
-    sourceresistance = 50 # Ohms
-    # sourceresistance = 4 # Value from http://hdl.handle.net/1842/4074
+    # Unknown properties
+    if 'kwargs' in locals():
+        excitationfreq = kwargs['excitationfreq']
+        sourceresistance = kwargs['sourceresistance']
+        absorberEr = kwargs['absorberEr']
+        absorbersig = kwargs['absorbersig']
+    else:
+        excitationfreq = 1.5e9 # GHz
+        # excitationfreq = 1.71e9 # Value from http://hdl.handle.net/1842/4074
+        sourceresistance = 50 # Ohms
+        # sourceresistance = 4 # Value from http://hdl.handle.net/1842/4074
+        absorberEr = 1.7
+        # absorberEr = 1.58 # Value from http://hdl.handle.net/1842/4074
+        absorbersig = 0.59
+        # absorbersig = 0.428 # Value from http://hdl.handle.net/1842/4074
     
     x = x - (casesize[0] / 2)
     y = y - (casesize[1] / 2)
@@ -54,10 +65,9 @@ def antenna_like_GSSI_1500(x, y, z, resolution=0.001, **kwargs):
         raise CmdInputError('This antenna module can only be used with a spatial discretisation of 1mm or 2mm')
 
     # Material definitions
-    print('#material: 1.7 0.59 1.0 0.0 absorber')
-    # print('#material: 1.58 0.428 1.0 0.0 absorber') # Value from http://hdl.handle.net/1842/4074
-    print('#material: 3.0 0.0 1.0 0.0 pcb')
-    print('#material: 2.35 0.0 1.0 0.0 hdpe')
+    print('#material: {:.2f} {:.3f} 1 0 absorber'.format(absorberEr, absorbersig))
+    print('#material: 3 0 1 0 pcb')
+    print('#material: 2.35 0 1 0 hdpe')
 
     # Antenna geometry
     # Plastic case
@@ -161,8 +171,17 @@ def antenna_like_MALA_1200(x, y, z, resolution=0.001, **kwargs):
     skidthickness = 0.006
     bowtieheight = 0.025
     
-    excitationfreq = 0.978e9 # GHz
-    sourceresistance = 1000 # Ohms
+    # Unknown properties
+    if 'kwargs' in locals():
+        excitationfreq = kwargs['excitationfreq']
+        sourceresistance = kwargs['sourceresistance']
+        absorberEr = kwargs['absorberEr']
+        absorbersig = kwargs['absorbersig']
+    else:
+        excitationfreq = 0.978e9 # GHz
+        sourceresistance = 1000 # Ohms
+        absorberEr = 6.49
+        absorbersig = 0.252
     
     x = x - (casesize[0] / 2)
     y = y - (casesize[1] / 2)
@@ -200,14 +219,14 @@ def antenna_like_MALA_1200(x, y, z, resolution=0.001, **kwargs):
     rxsiglower = ((1 / rxrescelllower) * (dy / (dx * dz))) / 2 # Divide by number of parallel edges per resistor
     
     # Material definitions
-    print('#material: 6.49 0.252 1.0 0.0 absorber')
-    print('#material: 3.0 0.0 1.0 0.0 pcb')
-    print('#material: 2.35 0.0 1.0 0.0 hdpe')
-    print('#material: 2.26 0.0 1.0 0.0 polypropylene')
-    print('#material: 3.0 {:.3f} 1.0 0.0 txreslower'.format(txsiglower))
-    print('#material: 3.0 {:.3f} 1.0 0.0 txresupper'.format(txsigupper))
-    print('#material: 3.0 {:.3f} 1.0 0.0 rxreslower'.format(rxsiglower))
-    print('#material: 3.0 {:.3f} 1.0 0.0 rxresupper'.format(rxsigupper))
+    print('#material: {:.2f} {:.3f} 1 0 absorber'.format(absorberEr, absorbersig))
+    print('#material: 3 0 1 0 pcb')
+    print('#material: 2.35 0 1 0 hdpe')
+    print('#material: 2.26 0 1 0 polypropylene')
+    print('#material: 3 {:.3f} 1 0 txreslower'.format(txsiglower))
+    print('#material: 3 {:.3f} 1 0 txresupper'.format(txsigupper))
+    print('#material: 3 {:.3f} 1 0 rxreslower'.format(rxsiglower))
+    print('#material: 3 {:.3f} 1 0 rxresupper'.format(rxsigupper))
     
     # Antenna geometry
     # Shield - metallic enclosure