Which answer is correct for this Antenna and Wave Propagation homework problem?

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The discussion revolves around a homework problem related to antenna and wave propagation, where one participant believes the correct answer is (a), while the textbook states it is (d). There is confusion regarding the term "omnidirectional," with participants questioning whether it refers to a spherical radiation pattern or a specific plane related to a dipole antenna. Despite agreeing that answer (d) seems unusual, understanding the definition of omnidirectional is seen as crucial for solving the problem. Additionally, there is a suggestion to calculate the array factor to determine the angle for maxima.
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Homework Statement


I have attached the photo of the problem below.

Homework Equations

The Attempt at a Solution


According to me answer should be (a) but book is giving answer as (d).
 

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Dhruv said:

Homework Statement


I have attached the photo of the problem below.

Homework Equations

The Attempt at a Solution


According to me answer should be (a) but book is giving answer as (d).

What do they mean by "omnidirectional" here? Like a spherical radiation pattern? Or omnidirectional in the plane that is perpendicular to a dipole antenna?

I also agree that d is a strange answer, but knowing what they mean by omnidirectional may help...
 
L
berkeman said:
What do they mean by "omnidirectional" here? Like a spherical radiation pattern? Or omnidirectional in the plane that is perpendicular to a dipole antenna?

I also agree that d is a strange answer, but knowing what they mean by omnidirectional may help...
Like a spherical radiation pattern.
 
berkeman said:
What do they mean by "omnidirectional" here? Like a spherical radiation pattern? Or omnidirectional in the plane that is perpendicular to a dipole antenna?

I also agree that d is a strange answer, but knowing what they mean by omnidirectional may help...
I should calculate the array factor correct ? And then from there I should calculate angle for maxima ?
 
Help please .
 

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