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Rus

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Posts posted by Rus


  1. Hi everyone!
    I work on printed log periodic antenna in 300...400 MHz band and I found out that the theoretical expressions do not give a good result and antenna still needs an optimization.

    While optimizing I faced to a problem, that the CST optimizer changes all parameters in the same time so the structure is changed dramatically.

    Give me please an advise how to run the optimization of the antenna structure while saving arm's dimensions ratio. Here is the .cst file

    Thank you in advance    

    Before optimization.jpg

    After optimization.jpg

    Log Periodic.cst


  2. Hi guys! 
    I'm working on a spacecraft deployable antenna for the 300 - 400 MHz band. 
    I found a good article on the subject of vibrator antenna and simulated it. I have encountered two problems:
    1. I was not able to get a better VSWR than is shown in the figure. Maybe someone can optimize it better than me?
    2. My CST does not show the axial ratio. How to solve this problem? 
    Thanks in advance!

    Design Optimization of an Inverted V-dipole.pdf

    S-parameter.png

    Antenna.jpg

    Dipole 351 antenna ver 3.cst


  3. Hi everyone! 
    I am looking for formula (or model) for calculation this type of Vivaldi antenna for broadband applications (3 GHz to 6 GHz)
    The feeding of this type of antenna is very suitable for flat shield mounting
    Thanks in advance

    Vivaldi antenna S-parameters.png

    Vivaldi antenna.png