[amsat-bb] Re: S-Band musings

[John Zaruba Jr <jzaruba@xxxxxxx>]

Hi Gang,

I found the answer to my patch antenna questions. See Amsat Journal 
March/April 1993,
"AMSAT Phase 3D Antenna Design Review - Phase 3D HF/UHF/Microwave 
Antennas by  Stan Wood & Dick Jansson." Nice, concise explanation of 
patch antenna design.

I knew there was a reason I kept those old journals around ;^)

73,

John AA2BN

On Wednesday, Oct 23, 2002, at 20:45 US/Eastern, John Zaruba Jr wrote:

> Hi Gang,
>
> I recently re-kindled my interest in satellite operating ( thanks to 
> Lyle KK7P for the inspiration ) and I'm going to jump in with both 
> feet on AO-40. I've decided to use a DEM 60 cm dish, and I plan to 
> homebrew a K3TZ patch feed. My question for the folks with this type 
> of patch relates to the nylon spacers. K3TZ says on one of his pages 
> to omit the spacers because they degrade the performance of the 
> antenna. How is everyone maintaining the patch spacing? I  thought 
> about using a slab of teflon or delrin (of the correct thickness) 
> epoxied between the patch and the reflector. I'm assuming it's the 
> screws through the patch and reflector that hose things up.
>
> Any input from this august body is appreciated ;^)
>
> 73,
>
> John AA2BN

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