All of your videos are excellent. I don't know if you are listening still to replies, and I hate to impose if you are, but a fascinating question I have been trying to answer is that the length to diameter of a dipole antenna determines its bandwidth, and adding d with a fixed l increases the bandwidth while decreasing its resonant frequency. Do you know why this is? I have done many searches and found nothing, except that increasing d reduces the inductance, which contradicts the lowering of the resonant frequency, unless fringe fields counteract the reduction in inductance. Thank you, whether you see this or not. Edited to add: I found the answer in ARRL Handbook on page 20.3. “If the diameter of the conductor is increased, the capacitance per unit length increases and the inductance per unit length decreases. Since the radiation resistance is affected relatively little, the decreased L/C ratio causes the Q of the antenna to decrease so that the resonance curve becomes less sharp with change in frequency. This effect is greater as the diameter is increased, and is a property of some importance at the very high frequencies where the wavelength is small.”
All of your videos are excellent. I don't know if you are listening still to replies, and I hate to impose if you are, but a fascinating question I have been trying to answer is that the length to diameter of a dipole antenna determines its bandwidth, and adding d with a fixed l increases the bandwidth while decreasing its resonant frequency. Do you know why this is? I have done many searches and found nothing, except that increasing d reduces the inductance, which contradicts the lowering of the resonant frequency, unless fringe fields counteract the reduction in inductance. Thank you, whether you see this or not.
Edited to add: I found the answer in ARRL Handbook on page 20.3.
“If the diameter of the conductor is increased, the capacitance per unit length increases and the inductance per unit length decreases. Since the radiation resistance is affected relatively little, the decreased L/C ratio causes the Q of the antenna to decrease so that the resonance curve becomes less sharp with change in frequency. This effect is greater as the diameter is increased, and is a property of some importance at the very high frequencies where the wavelength is small.”
Great work and, great efforts for the designs, explanations, thanks a lot. :)
Thank you!
Thank you this video is one of the best
You are the best I know.
Thank you so much Prof. Smith. I couldn't find this course in Ansys innovation courses, could you please provide the link or how i can find it.
Link is dead. Good video
Thanks for the heads-up! It should be corrected now.