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5 maj 2023 · Learn how to use a single dipole antenna on multiple HF bands using different methods, such as harmonic resonances, multiple dipoles, tuned antennas, and more. See examples, diagrams, and tips for each method.
Here is a fairly simple and easy to build multi band horizontal fan type dipole that can be constructed for all band operation from 160 meters up thru 6 meters or even higher. In the drawing above, it is shown for just four bands, 80 thru 10. One separate dipole for each band needed.
Learn how to make a multiband dipole antenna with two equal lengths of copper wire and ladder line. This antenna is simple, low-loss and easy to tune, but requires a balanced output tuner and a clear installation.
classic multiband dipole antenna. Power is fed at the center through a length of 450-ohm windowed ladder line. The ladder line connects to a balun that converts the impedance to a lower value for the antenna tuner. Finally, the tuner connects to the transceiver. ARRL1989 1
Multiband antenna #5 - the "fan" dipole. This is really just the simple dipole but a bunch of them, all using the same center insulator and feed line. Yes, you just cut wire dipoles for each band you wish to operate (40 and 15 can use the same one), attach them all to the center insulator and feed line and scurry from band to band with ease.
The Kelemen multiband dipoles are dipole antennas that try to achieve a reasonable compromise between length and available bands. In addition, the weight should be kept as low as possible due to the blocking circuits (traps), while still achieving good durability and robustness.
Band. Frequency. Length. The elevation plots on the right show that the lower we place a dipole, the higher the angle of radiation, a fact that limits our effective range of communications under normal propagation conditions.
