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

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Discussion Overview

The discussion revolves around a homework problem related to antenna and wave propagation, specifically addressing the interpretation of the term "omnidirectional" in the context of the problem and the discrepancy between the participant's answer and the book's answer.

Discussion Character

  • Homework-related, Conceptual clarification, Debate/contested

Main Points Raised

  • Some participants propose that the answer to the homework problem should be (a), while the book provides (d) as the correct answer.
  • There is uncertainty regarding the definition of "omnidirectional," with participants questioning whether it refers to a spherical radiation pattern or to omnidirectionality in a specific plane related to a dipole antenna.
  • One participant suggests that calculating the array factor might be necessary to determine the angle for maxima.
  • Another participant expresses confusion and requests further assistance.

Areas of Agreement / Disagreement

Participants generally agree that the answer (d) seems strange, but there is no consensus on the correct interpretation of "omnidirectional" or which answer is ultimately correct.

Contextual Notes

There are unresolved questions regarding the assumptions behind the term "omnidirectional" and the calculations needed to arrive at a solution, which may depend on specific definitions and interpretations.

Dhruv
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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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