X4 minimal RCS at maximal distance

Discussion in 'X2 & X4 SoC' started by phys laba, Nov 4, 2019.

  1. phys laba

    phys laba New Member


    Im trying to understand the minimal RCS (radio cross section) needed at maximal distance (say, 10m) in order to be able to detect the target. Cant find anywhere in the documentation and forum.

    I want to be able to use the radar equation to determine some things of interest. I realize it will depend on noise, so lets assume I have a Faraday shielded anechoic chamber.

  2. Charlie Shao

    Charlie Shao Moderator Staff Member

    Hi Vitali,
    We did not focus on minimal RCS, instead, we use metal balls with fixed RCS to measure human respiration.
    Here is the Lego robot we use for simulation:

    For a normal shape adult, the RCS is close to a 5cm metal ball. For the infant, RCS is close to 2cm.
    You may need to use a similar setup for your measurement. Please also mind that RCS is not related to distance. See refer to here: https://www.radartutorial.eu/01.basics/Radar Cross Section.en.html
  3. phys laba

    phys laba New Member

    Thank you, Charlie,

    My application is not related to respiration. I'll ask the question in an alternative manner which would hopefully clarify.

    What is the minimal reflected power the radar can register, assuming its in a faraday shielded anechoic chamber (i.e. the noise floor is essentially determined by temperature alone)?

    Thanks again
  4. Charlie Shao

    Charlie Shao Moderator Staff Member

    Hi Vitali,
    The question you asked is not a proper way to evaluate X4 based UWB radar system.
    Please read the following IEEE paper and X4 datasheet to get more details.