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GATE ECE 1992 | Question-39

The beamwidth-between-first null of uniform linear array of $\mathrm{N}$ equally-spaced (element spacing $=d$ ), equally-excited antennas is determined by

  1. $\mathrm{N}$ alone and not by $d$
  2. $d$ alone and not by $\mathrm{N}$
  3. the ratio, $(\mathrm{N} / d)$
  4. the product, $(\mathrm{N} d)$

     

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