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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
by dylan604 4mo 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 4mo agoThere's enough space for one.
- polishdude20 4mo agoTraces can be antennas
- piltdownman 4mo agoAm I missing something? Most IoT devices use trace antennae https://en.wikipedia.org/wiki/Microstrip_antenna https://en.wikipedia.org/wiki/Microstrip_antenna
- bradfa 4mo agoTrace 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 4mo 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 4mo agoAt >= 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.