quesion about using cooper wire as Antenna

[DukeLeon]

cooper wire

Hi all, I will use a piece of cooper wire as an antenna to sense the transmitted signal. But I wonder how much voltage can be generated by a piece of cooper wire (length=30cm)?
Can it generate an amplitude of 0.5mV sin wave?

Thanks

 

[vfone]

using a piece of wire as an antenna

Depends by the frequency used. For such low voltage and wire length is no problem to transmit in a frequency range between UHF and let's say 2.5GHz.

 

[DukeLeon]

antenna cooper

Depends by the frequency used. For such low voltage and wire length is no problem to transmit in a frequency range between UHF and let's say 2.5GHz.

But the transceiver I design is 433MHz frequency..
What order voltage can this wire antenna generate? Thx

 

[vfone]

using regular wire as antenna

Voltage and current flowing into the antenna depends by the radiation resistance.
https://en.wikipedia.org/wiki/Radiation_resistance

 

[FvM]

rf 433 wire as antenna

Can it generate an amplitude of 0.5mV sin wave?

Yes it can, even with a 433 MHz small radio device. Assuming 10 dbm transmitted power and 2.1 dB dipole gain for transmitter and receiver antenna, you get about -20 dbm received power at 3 m distance, equivalent to 20 mV rms into 50 ohm.

A λ/4 (17.5 cm) monopole with a ground plane is the most simple antenna with about 50 ohm impedance.

Refer to free space attenuation to learn more about basic RF transmission properties.