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Practice over 1000+ GATE-level questions from this topic!

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Q#1 Antennas GATE EC 1991 MSQ +2 marks -0 marks

In the radiation pattern of a 3-element array of isotropic radiators equally spaced at distances of  it is required to place a null at an angle of 33.56 degrees off the end-fire direction. Calculate the progressive phase shifts to be applied to the elements. Also calculate the angle at which the main beam is placed for this phase distribution.

progressive phase shift:
\(\scriptstyle {\alpha = 45^\circ}\)

progressive phase shift:
\(\scriptstyle {\alpha = 65^\circ}\)  

Angle at which the main beam is placed for this phase distribution \(\scriptstyle {120^\circ}\)

Angle at which the main beam is placed for this phase distribution \(\scriptstyle {180^\circ}\)

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