Ham Radio Forum

Hi, I'm a college student and now I'm learning antenna. I want to build a printed dipole for 2.4GHz, but I don't know how to design a balun with it, can anybody here help me solve this problem or just give me some figure of design for reference? Thank you very much~~!

It is necessary to know the antenna feed impedance, the transmission line impedance, and the impedance of the RF amplifier circuit the antenna will couple to design a proper balun.

1) Does the dipole have thin-conductor elements (thin compared to their lengths) of uniform cross-section?

2) Is the dipole folded?

3) Is the dipole center-fed?

4) What is the transmission line impedance?

5) Is the transmission line balanced or unbalanced?

6) What is the RF amplifier circuit impedance?

There is an excellant article describing a printed circuit 2.4 GHz antenna with a printed circuit balan at http://www.cst.com/Content/Articles/article55.aspx.