Copper wire, aluminum wire around the city spiral, you can use when the antenna? Why? Can antennas only be wires? What are their characteristics?
1, yes, copper wire, aluminum wire around the city can be used as a spiral antenna.2, the reason is more complex, and so you when physics to this part of time to understand.3, when the antenna is not only wire, non-metallic conductor can also.
Antenna materials generally require less resistance, easy processing molding. Copper wire, aluminum wire resistance is smaller, good ductility, is to do more ideal antenna material.
Non metallic conductors can be used as antennas, for example, antennas for certain devices, conductive rubber, graphite material, etc..To remind you that the "antenna" in physics is different from the "antenna" in life. The "antenna" in physics is the emitter, and the "antenna" in life (such as the television antenna) is the receiving pole.In physics or in life, antennas do not have to be spiral.
