Antenna Array Performance with Number of Elements for Aperture Distributions

Compact series FED tapered antenna array using unequal rectangular microstrip antenna elements

“…Table gives the analysis of series fed arrays consisting of both; the odd and an even number of elements, starting with small number. The minimum number of elements required to realize cosine‐square aperture distribution for antenna arrays is 6 . However, with added pedestal height of 0.5, the cosine‐square distribution also works for N = 4 onwards.…”

“…From Table , it is observed that desired FSLL using cosine‐square distribution over 0.5 pedestals, initially improves for a small N as N is increased from 4 to 10 prior to saturation and then degrades for higher number of elements. This behavior is opposite as that of distribution without pedestal for this distribution . Figure gives the broadside radiation pattern of the tapered series fed array as shown in Figure for N = 5, 7, 9, and 10.…”

“…This behavior is opposite as that of distribution without pedestal for this distribution. 6 Figure 2 gives the broadside radiation pattern of the tapered series fed array as shown in Figure 1 for N 5 5, 7, 9, and 10. It is observed here that the FSLL improves with increase in N for a small number of elements for the cosine-square distribution over 0.5 pedestals.…”

“…Both Refs. and use the Chebyshev/Taylor distribution which presents problems with edge effects and mutual coupling for large number of elements and for side lobe levels above −22 dB . Recently, a method in Ref.…”

“…4 and 5 use the Chebyshev/ Taylor distribution which presents problems with edge effects and mutual coupling for large number of elements and for side lobe levels above 222 dB. 6 Recently, a method in Ref. 7 has discussed the variation of width of RMSA for FSLL reduction using the parato genetic algorithm.…”