E-Plus tower Ossendorf

Nice. I wonder if no neighbors have complained about this 'mast' on top of this building. Looks kind of big.

Good point, I think this is a multi-frequency site. They must GSM 1800 and UMTS 2100 here.

So I assume that 2100 UMTS sites are even thinner than 1900 voice sites?

I believe so. IIRC, the shorter the antenna, the higher the frequency.

Yep huge by German standards for a rooftop setup .

That's what I figured too.

I tried finding some info on Wikipedia and Google but I didn't find any pertinent info, I remember about the frequency info in my Radio Shack Scanning Guide for the West a few years ago.

Not neccessary. Here in NZ, Vodafone antennas are usually sized in this order:-

long - GSM 900 (thickest)
medium - UMTS 2100 (usually thinnest)
small - 1800

Theory states that the higher the frequency, the smaller the wavelength. This is correct, but I guess the UMTS antennas have some extra stuff in it making them a bit longer than the GSM-1800 antennas. Some UMTS antennas are even the same length as GSM-900 antennas. Perhaps this is to make sure the antennas don't look too different or something.

Also some low-gain GSM-900 antennas are about the same length as GSM-1800 antennas, but rather thick. Generally it's the thickness that makes the difference from what I have observed.

Dual-band GSM-900/UMTS-2100 antennas are usually the same size as normal GSM-900 antennas.

Thanks for the clarification, Kiwi. Time to go back over there to check out all the changes now that UMTS is well built out.

Cool now I know what to look out for