ok MMDS is 2.5-2.69GHz, can we assume that the dipole is tuned to (2.5+2.69)/2=>2.595GHz, and (some one suggested to me) -do 50*2.595/2.450=>53mm? there is a angular reflector at the nose -is it related to the wavelength/phase/dish_f/D -shall i live it alone. i dream of making two of these antennas as a passive reflector. there is an awful amount to read about horn and other feeds for dish ant. but not much around dipole feeds.
thank you indeed mila --- Greg DesBrisay <[EMAIL PROTECTED]> wrote: > > The MMDS band is 2.5-2.69 GHz. > If the antenna is a dipole, then it's dimension will > be half a > wavelength (ignoring effects from the PC board). So > the wavelength your > antenna is designed for is roughly 300 MHz/(.05m * > 2) = 3GHz (ignoring > effects from the PC board). That's close to > 2.5-2.69 GHz. > That said, I doubt that the antenna would be > effective in the 2.4-GHz > ISM band without some tweaking. If the antenna is a > plain dipole, then > you might be able to solder some extra wire onto the > ends of the dipole > to lower it's resonant frequency to the ISM band, > but that really would > require the use of a network analyzer to tell you > when you've added the > proper amount of wire! > > Regards, > > Greg DesBrisay > [EMAIL PROTECTED] > > > > On Wed, 2003-01-15 at 18:08, Milla Yegurku wrote: > > Hi > > > > I cut open the plastic cover off of a "Gardiner > MMDs > > downconverter". The ballon/diapole is traced on a > > printed circuit board. I measured the diapole end > to > > end. It is 50mm (+-.5mm) -now that diapole tunes > to > > 6Gh? Could not use it for 802.11? any remarks? > > i thought i would solder a piece of copper to each > end > > of diapole, so the total length will be 62mm, and > > leave the ballon alone?? > > > > Mila __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
