Hello everybody, I agree with Trevor, GS requirement for the 2.4 GHz band are quite "challenging".
Anyway, I have another question, what kind of orbit this constellation will be designed for? If it is less than 500 km, how many *months* will it last?
73s Fabio iz5xrc
On Mon, Feb 10, 2014 at 8:43 PM, M5AKA m5aka@yahoo.co.uk wrote:
Yes, a dish needed, ISS HamTV provides a good illustration of the requirements to achieve a 2 Mbps downlink at 2400 MHz.
73 Trevor M5AKA
On Monday, 10 February 2014, 18:16, Howie DeFelice howied231@hotmail.com wrote:
Just in case anyone was curious about the practicality of actually transmitting WiFi from a cubesat, I did a quick link budget. Based on typical 802.11 specs, the MDS of a receiver is about -90 dBm. The path loss at 2.4GHz between a ground station and a satellite overhead in a 600Km orbit is a little over 155 dB. Assuming a zero gain antenna on the typical WiFi client radio, the required EIRP from the cubesat is in the neighborhood of 4KW. I don't think we are quite there yet with current solar cell technology.... not to mention the difficulty keeping the PA cool :)
- Howie AB2S
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