I need some help getting my head around something, is there anyone here who's familiar with the RTL-SDR dipole antenna kit product? The one described on this page: https://www.rtl-sdr.com/using-our-new-d ... tenna-kit/

I've been using it, fairly successfully, for about a year now. I recently tried to use it with the short telescopic sections to try and receive the downlink of the cross-band repeater on board the ISS. Which is on 437.8 MHz.

In terms of calculating the lengths of the telescopic sections the article I linked above has a section called

**Choosing the Antenna Element Length**. It advises to use this dipole calculator website to calculate the length that will make the antenna resonant frequency match the frequency you are interested in. There's also a little cheat sheet table for various common frequencies.

Now, I can only make the dipole calculator website match the cheat sheet if I select

**One side**. To me it makes sense to do it this way because you have two telescopic sections to set and therefore you would probably do them separately.

However I was recently in a discussion with a colleague who was advising I should set the calculator to

**Both sides**because this will give a value which is closer to half the wavelength at the desired frequency. Now this is where I am getting confused.

If it is a half-wave dipole then the full length of the dipole would be half of the wavelength right? So each side is a quarter of the wavelength.

Or is it a full-wave dipole and each side is half of the wavelength and the full length of the dipole is equal to the wavelength?

Which is it?

Sorry I know this is probably novice level stuff, but by Google Foo seems to be failing me.

Many thanks in advance

Dave 2E0XDO