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KSM

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Posts posted by KSM

  1. Posted

    I still don't fully understand it.

    How are the power lines calculated for such an antenna? Is it the same as for printed circuit boards, where only air is taken into account as a dielectric, or are different formulas used? Also, why is the element with the director bolted to the reflector at the centre of the element?

  2. Posted

    Wow..

    How are the power lines calculated for this type of antenna? Is it the same way as in printed patch antennas? I also wonder why there is a connection to the reflector in the central part of the element. Is this a mandatory part? I just haven't come across such antennas before.

  15. Posted

    On 03.05.2018 at 10:45 PM, Admin said:

    The cross antenna is a medium gain and circular polarization structure made of a conductor or a strip line over the ground plane following a cross contour of four or more branches.The construction repeatability is verry easy as well the facility to obtain 14dBi gain in a small antenna.

    cross 5,5_01-tile.jpg

    cross 5,5_07.jpg

     

    cross 5,5_01.gif

    Very interesting antenna. Can you give the dimension for 5645, please?

    1 person likes this

  17. Posted

    5 hours ago, Admin said:

    Yes, it's fine, the thickness of the material doesn't matter.

    ,,,but what is "M1/M2"...???

    Copper comes in different grades: M00, M0, M1, M2 and M3. The grade is determined by the purity of the copper content. M1p, M2p and M3p copper contain 0.01% oxygen and 0.04% phosphorus. Copper grades M1, M2 and M3 contain 0.05–0.08% oxygen.

  23. Posted

    1 hour ago, Admin said:

    ,,,the antenna in the first figure has a wider frequency band...!!!

    Is it possible to say that an antenna designed for 5645 MHz with a narrow frequency band is more efficient than an antenna designed for 5645 MHz with a wider frequency band?
    Thank you for the answer!