Questions tagged [resonance]
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5
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-1
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74 views
Broadband dipole with no standing waves?
If a diode or directional coupler is fitted at the outer ends of the elements of a dipole, would this stop current reflected from the ends and so result in no standing wave on the antenna ? It can't ...
0
votes
1answer
68 views
Does antenna Q cause distortion?
Everyone knows that a 1/2 λ dipole has on the elements a standing wave the voltage and current of which are a bit less than 90° out of phase with each other, and the departure of this phase difference ...
2
votes
2answers
119 views
Why do ham radio operators say that a full wave dipole isn't resonant?
Every reputable antenna book that I've read says that dipole antennas are resonant at integer multiples of a half wave length.
Wikipedia describes resonance as:
the phenomenon of increased amplitude ...
0
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1answer
44 views
Is the phase difference between the voltage and current of the standing wave on a dipole antenna constant along the dipole's length?
Everyone knows that a 1/2 λ dipole antenna has on it a standing wave of RF energy the voltage and current of which are about 90° out of phase with each other. The standing wave is circulating reactive ...
0
votes
2answers
102 views
Does the self inductance and velocity factor of the elements of a dipole antenna change its resonant frequency?
Below are well known equations from Wikipedia for the resistance and reactance in the impedance of a dipole antenna.
where $a$ is the radius of the conductors, $k$ is the wave number 2πf/c, $η_0$ ...