+ Post New Thread
Results 1 to 4 of 4
  1. #1
    Member level 1
    Points: 3,128, Level: 13

    Join Date
    Apr 2002
    Posts
    40
    Helped
    0 / 0
    Points
    3,128
    Level
    13

    differential antennas

    hi

    where i can find some formula for differential patch antennas


    tanks.

    •   AltAdvertisment

        
       

  2. #2
    Member level 1
    Points: 1,790, Level: 9

    Join Date
    Jun 2004
    Posts
    33
    Helped
    0 / 0
    Points
    1,790
    Level
    9

    Re: differential antennas

    I haev the same problem, any one out there with any insight would be great. My issue is that we need to cut cost and get rid of a balun and our tx out put and rx input are differential. This is for the 2.4GHz band and trying to design a printed circuit board antenna!!! Help anyone??



    •   AltAdvertisment

        
       

  3. #3
    Member level 1
    Points: 1,790, Level: 9

    Join Date
    Jun 2004
    Posts
    33
    Helped
    0 / 0
    Points
    1,790
    Level
    9

    Re: differential antennas

    any one know any typical types of printed circuit board differential antenna for antenna?? THis would be for use in the 2.4GHz realm. I have had problmes finding any information on this.

    Would this just have two of the same type say if the positive side has a F antenna, then the negative side would also have a F antenna as well???



    •   AltAdvertisment

        
       

  4. #4
    Advanced Member level 1
    Points: 5,203, Level: 17
    radiohead's Avatar
    Join Date
    May 2004
    Location
    Heart of Europe
    Posts
    447
    Helped
    65 / 65
    Points
    5,203
    Level
    17

    Re: differential antennas

    It's a little more difficult than that. 1+1 does not equal 2 here. The problem is that an antenna is designed to radiate, so there should be some weird field distribution around the antenna. But everythin close to the antenna has it's influence on the field. So the near field of a differential antenna can be somewhat different. Different near field means different input impedance. And that's what the matching is all about!



--[[ ]]--