yefj
Advanced Member level 4
Hello i have build an antenna array shown bellow.our main beam is at 180 degrease
the frequency is 10Ghz.i have exiced then all the same amplitude with no phase.
lambda=30mm theta_0=0 d=48mm
48/30=1/(sin(theta)-sin(theta_0))
theta_0=0
theta=38.68
180+38.68=218
180-38.68=141
So i know that my grating lobes are rising because d/lambda>1 but grating lobe supposed to be in the same amplitude as the main lobe.
why they are smaller the the main lobe?
Thanks.
the frequency is 10Ghz.i have exiced then all the same amplitude with no phase.
lambda=30mm theta_0=0 d=48mm
48/30=1/(sin(theta)-sin(theta_0))
theta_0=0
theta=38.68
180+38.68=218
180-38.68=141
So i know that my grating lobes are rising because d/lambda>1 but grating lobe supposed to be in the same amplitude as the main lobe.
why they are smaller the the main lobe?
Thanks.