How to find monostatic RCS of flat strip.

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Discussion Overview

The discussion revolves around finding the monostatic Radar Cross Section (RCS) of a flat strip of length a. Participants are exploring the necessary expressions and approximations needed to derive the desired sinc result, with references to related concepts and historical context.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant requests assistance with finding the monostatic RCS, indicating they have the expression for the scattered field but struggle with the necessary approximations.
  • Another participant suggests that the query may relate to the RCS of a dipole of length a, discussing the proportionality of the dipole response for reception and retransmission to Sin(θ), leading to a product proportional to Sin²(θ).
  • This same participant notes that the RCS is specified relative to an equivalent sphere, which they believe connects back to the sinc function.
  • A third participant expresses that they have developed the necessary expressions for RCS but also face challenges with applying the approximations, seeking assistance in sharing their work.

Areas of Agreement / Disagreement

There is no clear consensus among participants, as some are focused on the flat strip while others introduce the concept of a dipole, leading to multiple competing views on the topic.

Contextual Notes

Participants have not resolved the specific assumptions or approximations needed for the calculations, and the discussion includes references to external resources and historical applications that may influence the understanding of RCS.

peripatein
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I'd appreciate some help finding the monostatic RCS of a flat strip of length a. I have figured out the necessary expression for the scattered field but am having difficulties figuring out the requisite approximations for arriving at the desired sinc result. If I provided all the expressions, would anyone here be willing to assist?
 
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peripatein said:
I'd appreciate some help finding the monostatic RCS of a flat strip of length a. I have figured out the necessary expression for the scattered field but am having difficulties figuring out the requisite approximations for arriving at the desired sinc result. If I provided all the expressions, would anyone here be willing to assist?
The wikipedia article explains Radiation Cross Section pretty well...

https://en.wikipedia.org/wiki/Cross_section_(physics)

Unless of course you are asking about something else... :wink:
 
I think you are asking about the RCS of a dipole of length a.
The dipole response for reception will be proportional to Sin(θ).
The dipole response for retransmission will be proportional to Sin(θ).
The radar reflection equation will be the product, so proportional to Sin2(θ)
But the RCS is specified relative to an equivalent sphere, which I believe brings it back to the sinc function.

Google; ' antenna mode RCS of a dipole '
You will find references like; http://www.dtic.mil/dtic/tr/fulltext/u2/a080989.pdf
RADAR countermeasures that employed dipoles as scatterers, developed during WWII, were called Chaff, Window or Duppel.
 
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I have developed all the necessary expressions for finding the desired RCS but am having difficulties applying the approximations. If I included my work here would anyone be kind enough to assist?
 

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