Biquad Antenna

Posted in October 11, 2007 ¬ 6:28 pmh.adminComments Off

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Simplest way to calculate or estimate (from an equation) the impedance of a 2.4 Ghz biquad antenna?

I would like to design a variation on this general type of antenna:

http://martybugs.net/wireless/biquad/

There are dozens of websites that discuss building these, but very little about the theory behind them.

I want to calculate ahead of time (before constructing the antenna), or at least roughly estimate (to within say plus or minus 20%) the theoretical impedance of the antenna (at 2.4 Ghz).

Does anyone know (or know where I can look up) the general impedance equations for this type of design?

I would like to know the equations (or a simple method of estimating) for BOTH the biquad (double loop like the one in the link) and also the simple quad (single quadrilateral loop)?

Thanks for your help!

I'm not sure.
But these links may lead you to the information you are seeking:

http://www.educypedia.be/electronics/easoftrf.htm

http://www.educypedia.be/electronics/electroniccalculatorrf.htm

http://www.softwareforeducation.com/electronics/notes/A2/Antenna/impedance-matching.php

And of course:

http://en.wikipedia.org/wiki/Antenna_%28radio%29

There are links within the Wiki

2.4 Ghz BIQuad Antenna -Part one

Wireless Networking

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