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Old September 27th 04, 06:52 PM
Adrian Brentnall
 
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Hi

On Mon, 27 Sep 2004 16:31:40 GMT, "WolfMan" wrote:

I'm Limited To An Antenna On The Front Of My House. Out My Window I Made A Simple !/4 wave Verticle Dipole.
Would A 1/2 Wave Simply Be Twice The Length, Using 462/f Mhz, And Would There Be An Advantage
With A 1/2 Wave Over a 1/4 Wave ?
Thanks


I'm not exactly certain what you've built - is each 'leg' of the
dipole about 19" - in that case you have a half-wave dipole.

The good thing about a half-wave dipole is that the impedance at the
centre of the dipole is a good match for your feeder & radio. If you
change the length of the dipole 'legs' then you'll get a poor match at
a half-wave per leg - but should get a good match again at 3/4
wavelength - but by that time the thing's getting cumbersome.

If you want something like a dipole but with more gain try a single
'quad' element, or maybe a 'slim-jim' type of antenna....

Alternatively a commercial mobile whip (say a 5/8th) with a suitable
ground plane might improve things for you - all depends on what you're
trying to achieve...

Regards
Adrian G0THW
Suffolk UK
 
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