1- A 5-element uniform linear array with inter-element spacing of /2 is to have
ID: 1922303 • Letter: 1
Question
1- A 5-element uniform linear array with inter-element spacing of /2 is to have maximum radiation in the direction =60° , find the current phases , find the directions of null radiation , hence sketch the radiation pattern , find also the relative side lobe level .
2- Design a linear broadside array to have nulls along the directions = 50°,130°, and 0° , namely find the number of elements , and the relative currents , find the beamwidth to nulls and the side lobe level .
3- Design a V antenna with arm length L=6 at the frequency 18 MHz , namely find the V angle in degrees , find the beamwidth between nulls.
if the frequency changes to 12 MHz , by how many degrees will the peak radiation direction rotate ? , comment on your result.
Explanation / Answer
Take a look at these links, might be helpful: http://ecen665web.groups.et.byu.net/notes/ln10.pdf http://www.eng.utah.edu/~ece5324/ECE%205324%20Hwrk%20Probs%2018-30_2011.pdf
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