What is a Dual Band Dipole Antenna?

This is a wire, the positive goes into the negative and stays out, now disconnect the wire,

This becomes a dipole antenna, don’t you think? ok straighten the wire

The magnetic fields at both ends point to infinity, which is a dipole

What? Dual frequency dipole?

Don’t wait long

As for the length, the theory: lambda=c/f, generally take 2×1/4λ

It depends on what frequency band you want, dielectric loss, etc.

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