In an antenna array,why do grating lobes appear in the radiation pattern if the element spacing is greater than half-wavelength????
No hope othrwys???
i find optics very boring.....
"greater than half-wavelength???? " Antenna spacing > 1/2 does not matter. The receiver sees the energy from all the antennas. If the phaseing is such that the power adds the signal is strong. If the power substracts, because 180, then the signal is very small.
The texts that I have say that you get grating lobes when spacing exceeds 1 wavelength*.
Btw,there may b secondary maximas even if the spacing is less than hlf wavlength,right????
How can we b sure that none of these will b a grating lobe?????