Bluetooth for Can Size Satellite Transmissions

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Discussion Overview

The discussion revolves around the feasibility of using Bluetooth technology for data transmission from a small satellite to a ground station, traditionally done using FM radio frequencies. Participants explore the limitations of Bluetooth, including range and regulatory considerations.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant questions the legality of using Bluetooth for satellite transmissions, highlighting the need for proper licensing based on frequency use.
  • Another participant notes that while Bluetooth is typically short-range, with high-gain antennas, it might be possible to establish a connection from low-earth orbit, although this would require larger antennas than the proposed satellite size.
  • A participant raises the idea of modifying a Bluetooth device for satellite use and inquires about licensing requirements for such modifications.
  • Concerns are expressed regarding power limitations of Bluetooth, which is designed for short-range applications, and the potential need for significant power to transmit from orbit to the ground.

Areas of Agreement / Disagreement

Participants generally agree on the regulatory and technical challenges of using Bluetooth for satellite communications, but there is no consensus on the feasibility of modifying Bluetooth devices or the specific licensing requirements.

Contextual Notes

Limitations include the lack of detailed knowledge about FCC regulations regarding Bluetooth modifications and the specific power requirements for effective transmission from orbit.

Who May Find This Useful

Individuals interested in satellite communications, amateur radio, or Bluetooth technology may find this discussion relevant.

ws0619
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Bluetooth can use??

Hi!I am planning to make a can size satellite.Normally we use FM(radio frequency) to transmit data from satellite to ground station.But can i use Bluetooth to replace FM?I know that Bluetooth is short-range frequency so any idea to solve this problem?Thanks!
 
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Well, if you could, you would be committing a federal crime. What frequencies do you have authority to transmit on?
 


ws0619 said:
Hi!I am planning to make a can size satellite.Normally we use FM(radio frequency) to transmit data from satellite to ground station.But can i use Bluetooth to replace FM?I know that Bluetooth is short-range frequency so any idea to solve this problem?Thanks!

As Halls says, you need to be licensed in whatever band you use, unless you use the SIM band. And even in the ISM band (aka the "microwave oven band"), you are limited to something like 5W of power (I forget the numbers right now). With very directional antennas, you might be able to make it from low-earth orbit to the ground, but the antenna will be more like a meter long and 7-10cm wide. That's bigger than your satellite...
 


Thanks for advising me. But can I just buy a Blutooth device to modify it? Is it need license too?
 


ws0619 said:
Thanks for advising me. But can I just buy a Blutooth device to modify it? Is it need license too?

I don't know the FCC rules for putting high-gain antennas on BlueTooth devices. You could try asking at one of the BlueTooth online web forums.

I think power might be an issue as well. BlueTooth is optimized for short range applications, and power is limited to help avoid multi-device interference. You will need some power to get from orbit to the ground, depending on the frequency and type/size of antenna.
 

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