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Oxidation on Loop Receive Antenna

 
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rons
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Joined: 23 Oct 2015
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PostPosted: Sun Apr 10, 2016 12:19 am    Post subject: Oxidation on Loop Receive Antenna Reply with quote

Does anyone know whether oxidation on an aluminum mag loop surface reduces performance over time? I have a Pixel Pro-1B receive-only non-resonant amplified loop antenna that has been in the weather for several years.

Thanks, Ron
K2RAS
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admin
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Joined: 03 Jan 2007
Posts: 203

PostPosted: Sun Apr 10, 2016 5:10 am    Post subject: Reply with quote

If the aluminum oxide is resistive, it would degrade the antenna performance. However, after a quick search on the conductivity of aluminum oxide it still looks to be a decent conductor, so I don't suspect there is degradation
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helix
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Joined: 29 Jan 2015
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PostPosted: Mon Apr 11, 2016 1:41 pm    Post subject: Reply with quote

Aluminum oxide, also known as alumina, is an incredible insulator and low loss dielectric. But a thin surface layer should not have much effect on your loop.
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