Dear friends
The best length for resonance on dipole is λ/2 ,
but short dipole could be used λ/10 .
We know that performance for dipole in λ/2 is better .
In reality , we often need short dipole for mechanical design .
The short dipole and λ/2 dipole can has the same resonance frequency .
How can it do that ? (the same resonance frequency for short dipole and λ/2 dipole)
The physical structure is needed for resonance .
Why is the length for short dipole is enough to resonance ?
Thanks for any instruction .