Why am I getting higher S parameter values when I put a glass box between 2 antennas ?

- February 1, 2021 at 8:16 pm
  
  Balkan
  Subscriber
  
  I will be as specific as possible. My aim is to see how different materials affect the received signal. I am doing this by placing a box of a specific material between two dipole antennas.
- February 4, 2021 at 1:32 pm
  
  rtk
  Ansys Employee
  
  ,nYes, reception should be higher for free space rather than with any obstacle between those antennas.nCould you please try with a smaller value of 'delta' (or tight convergence) and check the S21 value? Check with value 0.1 or 0.005. nAlso, try with any other metal material (PEC, copper, etc..) instead of glass and check the S21 value?.Best Regards,n
- February 5, 2021 at 3:27 am
  
  AndyJP
  Subscriber
  
  1)Even though PML is better than ABC, it should not be placed very close to the model at oblique angles. Particularly, in near-field region, where you do it. So move it away at least on quarter-wave.n2)may it be just a case of optical refraction and internal reflection in a thick layer? Hard to believe, but such things can happen.n3)then, the antennas are quite close, so you could get a capacitive coupling with assistance of that dielectric.nIf you are not sure, set the Delta S=0.005 with enough number of passes (50-80, does not matte, enough for DS) , minimum converged passes 2-3, and mixed ordern

Viewing 2 reply threads

You must be logged in to reply to this topic.

Ansys Innovation Space

Boost Ansys Fluent Simulations with AWS

Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.

Earth Rescue – An Ansys Online Series

The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.

Ansys Blog

Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.

Trending discussions