Use the gerberRead function to import top-layer Gerber file.

P = gerberRead('antenna_design_file.gtl');

Extract the metal layer from the file using the shapes function.

S = shapes(P);

View the metal layer.

figure
show(S)

Modify the metal layer.

S.Vertices = [-1 0 0;-0.5 0.2 0;0 0 0;0.0375 -0.0188 0];

View the modified metal layer.

show(S)

Create a PCBReader object.

B = PCBReader;

Import a two-layer design.

st = B.StackUp;
st.Layer2 = 'UWBVivaldi.gtl';
st.Layer4 = 'UWBVivaldi.gbl';
B.StackUp = st;

Extract shapes from the metal layers.

S = shapes(B);

View the top-layer Gerber file.

figure
show(S(1))

View the bottom-layer Gerber file.

figure
show(S(2))