[amsat-bb] NASA Helical Antenna Question

Glenn Little WB4UIV glennmaillist at bellsouth.net
Mon May 7 23:39:52 UTC 2018


Looks like a standard 8 turn, axial mode, helix to me.

see https://en.wikipedia.org/wiki/Helical_antenna#Axial-mode_helical

Looks like about 8 dBi gain.

73
Glenn
WB4UIV


On 5/7/2018 6:57 PM, Steve Bossert via AMSAT-BB wrote:
> I am curious about the helical antenna in the article just released late last month:
> https://www.nasa.gov/feature/goddard/2018/nasa-upgrades-space-station-emergency-communications-ground-stations
>
> This one:
> https://www.nasa.gov/sites/default/files/thumbnails/image/upgradedvhf-antenna.jpg
>
> While I await a reply from the article author, I wonder if anyone may have some details on this antenna.
> Looks like a good candidate as a functional lawn ornament that is not another QFH for more garden modern art satellite installation.  I would like to author a construction and theory article for the HVDN.org  website in the "notebook" section.
>
> Thanks,
> Steve
> Steve Bossert K2GOG at yahoo.com 914-573-1799
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Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
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