Free space path loss is dependent on frequency. All things being equal (distance, antenna gain on both ends, etc), a 2 meter signal has about a 9 dB advantage over a 70cm signal.
Here's an explanation:
http://www.radio-electronics.com/info/propagation/path-loss/free-space-formu...
73,
Paul, N8HM
On Wed, Jun 17, 2015 at 10:42 AM, Andrew Koenig ke5gdb@gmail.com wrote:
Can you explain the 6dB advantage 2m has over 70cm? I've seen it here on the amsat-bb, and in the mesh realm when comparing 2.4GHz and 5.8GHz WiFi gear, but it still hasn't "clicked."
73 de KE5GDB
On Tue, Jun 16, 2015 at 6:56 PM, Paul Stoetzer n8hm@arrl.net wrote:
Nick,
It should be even stronger than AO-27's 500 mW, AO-27 had a 70cm downlink, the EO-80 downlink is on 2 meters, so EO-80's signal should be up to 9 dB stronger than AO-27 (12 dB stronger if they run it at 1 watt).
73,
Paul, N8HM
On Tue, Jun 16, 2015 at 7:49 PM, Nicholas Mahr nicholasmahr1@gmail.com wrote:
Thats very good news, Hopefully the two get activated before field day? Im most looking forward to EO-80, It should be like AO-27 with 500Mw or 1W. Good to know both are working well and wish a long life to them.
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Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
-- Andrew Koenig