In this video I will show you how to build a blade antenna for 2.4 GHz wifi. This antenna is a modified antenna I found in a book from 1947. It works better than I thought it would with gain around 9db and best of all it is omnidirectional. Based around a dipole antenna each section is ¼ wavelength (25mm).

Can it be made to work on both 800 and 1900 mhz by making one of the dipole pairs larger?
<p>How would this work for a wireless router to laptop &amp; dongle?</p>
<p>.... 25 mm is NOT &frac14; wavelength for 2.4GHz </p>
<p>It would be very hard for me to explain here in a few sentences. These types of dipole antenna are based on the short dipole. Basically this dipole is short when compared to a wavelength at the operating frequency 100mm v 124mm due to higher feed impedance with this design. If it was so easy to have a fixed measurement for a wavelength then people like me would not spend 4 years at university studying antenna theory.</p>
<p>....if you are so happy, I'm happy for you !!!<br>Thank goodness, in Italy we had Guglielmo Marconi.</p>
<p>Cool! Thanks for sharing this.</p>

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More by andrew mcneil:Double Crosshair Waveguide Antenna for 2 4GHz The Circular Polarized Crosshair Antenna 2,4GHz Combining a Cheap Antenna and Nano Router 
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