[Wswss] Re: [Sbms] 3/4 Inch circular waveguide loss at 10 GHz ?

[Chuck Swedblom]

Hi Jeff,

Several years ago I used the 3\4" Cu tubing to make up some Shephards
Crooks and at the time I setup to measure the loss of the w/g using two
20 foot pieces of tubing with two 90 degree bends.  I found that there
was less loss than WR90 over the same distance.  But, I did find that
you must be careful in selecting the 90 bends.  Some of them have the
diameter smaller than 3/4".  When this happens you will find that the
wave will rotate some what.  On the Shepherds crook, this amounted
to about 6 degrees or more.  I found that the Nibco brand 90's were
the best since they maintain the same diameter.

73,  Chuck  WA6EXV
 
On Sat, 6 Sep 2008 20:43:10 -0700 "K7XQ" <k7xq at elite.net> writes:
> Hello All,
> Does anyone know the loss of 3/4 inch circular waveguide ( copper 
> pipe )
> at 10 GHz ?
> 
> K7XQ Jeff
> Atwater,CA.
> Grid: CM97qi
> 
> 
> 
> 
> 
> 
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> 
> 
 
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