6 ms·

>Can't have an antenna of any form in it. All wires are antennas...

dylan604 3mo ago
But the short wires in a Nikon camera are not long enough to be a useful antenna. In fact, I doubt there's really anything one would consider a wire in a camera body. Everything is probably just traces on a PCB.
- inemesitaffia 3mo ago
  There's enough space for one.
- polishdude20 3mo ago
  Traces can be antennas
- piltdownman 3mo ago
  Am I missing something? Most IoT devices use trace antennae https://en.wikipedia.org/wiki/Microstrip_antenna https://en.wikipedia.org/wiki/Microstrip_antenna
  - bradfa 3mo ago
    Trace antennas are very specifically designed shapes given the PCB material and other nearby components and structures. It’s never “just a trace”. You’re right that traces can emit and receive RF, hence why things like FCC limits and testing exist even for unintentional emitters, but even failing devices which greatly exceed the limits have traces which are many orders of magnitude worse at being antennas than a typical trace antenna.
- eqvinox 3mo ago
  > But the short wires in a Nikon camera are not long enough to be a useful antenna. […] Everything is probably just traces on a PCB. Anyone who's had to get newly developed hardware through EMI certification in recent times can tell you that it's quite easy to accidentally make PCB trace work as an antenna. Not necessarily a great antenna but enough to emit some random signal and fail certification. 3 GHz is 100mm in wavelength, and a quarter wavelength makes one of the simplest antennas… that's only 25mm. The whole story is much more complicated but the thing is that the scales are in range.
- dghlsakjg 3mo ago
  At >= 2.4ghz, you measure antenna length in mm. Bluetooth antennas that are just traces on a PCB board are very common. Think about how small a bluetooth earbud can be and still get pretty incredible range.
jb1991 3mo ago
I think you wrote this comment with the compiler’s pedantic warnings turned on.
RobotToaster 3mo ago
If we're being pedantic, all conductors are antennas.

But the short wires in a Nikon camera are not long enough to be a useful antenna. In fact, I doubt there's really anything one would consider a wire in a camera body. Everything is probably just traces on a PCB.

inemesitaffia 3mo ago
There's enough space for one.
polishdude20 3mo ago
Traces can be antennas
piltdownman 3mo ago
Am I missing something? Most IoT devices use trace antennae https://en.wikipedia.org/wiki/Microstrip_antenna https://en.wikipedia.org/wiki/Microstrip_antenna
- bradfa 3mo ago
  Trace antennas are very specifically designed shapes given the PCB material and other nearby components and structures. It’s never “just a trace”. You’re right that traces can emit and receive RF, hence why things like FCC limits and testing exist even for unintentional emitters, but even failing devices which greatly exceed the limits have traces which are many orders of magnitude worse at being antennas than a typical trace antenna.
eqvinox 3mo ago
> But the short wires in a Nikon camera are not long enough to be a useful antenna. […] Everything is probably just traces on a PCB. Anyone who's had to get newly developed hardware through EMI certification in recent times can tell you that it's quite easy to accidentally make PCB trace work as an antenna. Not necessarily a great antenna but enough to emit some random signal and fail certification. 3 GHz is 100mm in wavelength, and a quarter wavelength makes one of the simplest antennas… that's only 25mm. The whole story is much more complicated but the thing is that the scales are in range.
dghlsakjg 3mo ago
At >= 2.4ghz, you measure antenna length in mm. Bluetooth antennas that are just traces on a PCB board are very common. Think about how small a bluetooth earbud can be and still get pretty incredible range.

jb1991 3mo ago

I think you wrote this comment with the compiler’s pedantic warnings turned on.

RobotToaster 3mo ago

If we're being pedantic, all conductors are antennas.