On Tue, 2006-07-11 at 14:47 -0700, ext George Farris wrote: > On Tue, 2006-11-07 at 23:55 +0300, Igor Stoppa wrote: > > On Tue, 2006-07-11 at 17:39 -0300, ext Adilson Oliveira wrote: > > > Igor Stoppa escreveu: > > > > On Tue, 2006-07-11 at 22:16 +0200, ext Laurent MARTIN wrote: > > > >> http://shop.brando.com.hk/bwmetalcase_details.php?i=74 > > > > > > > > Good idea, but I would like to know what's the radio efficiency > > > > considering the metallic shielding :-/ > > > > > > > > > > > > > > It's aluminium so this should not be a problem. > > > > True, still the original cover is mostly alluminum and plastic, but it > > is designed so that it does not interfere with the internal antenna. > > > > Theroetically the performance should not be significantly affected, > > since the permeability of aluminum is roughly the same as the air, > > however it might have some impact on battery life if used from within > > the box, especially closed. > > > > Unfortunately this is not true. The performance of the cover does > degrade the signal somewhat. I can consistently get a good signal from > my sundeck with the cover off but put the cover on and it is not true. > > Next time I'm in the shop I'll check it with a field strength meter. > http://www.linuxdevices.com/news/NS6268618501.html from the first picture you can see the antenna, on the top of course it's a problem of occlosure between the antenna and the hotspot, but only 1 side of it is affected by the cover, so mostly it is surrounded by "transparent" plastic, wether the cover is present or not. -- Cheers, Igor Igor Stoppa (Nokia M - OSSO / Tampere)
