For example: A “Rubber Duck Antenna” or ¼ wave monopole over a ground plane. Think of the ground plane being a metal roof of a vehicle and place the Rubber Duck antenna in the center with the antenna top end pointing straight up.
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A dipole design for the 20-meter band is an efficient and inexpensive antenna for the novice and veteran ham enthusiast alike. Separate the speaker wire into two 18-foot lengths. Measure 206 11/16 inches from the end of each wire, and cut the wires to this length. Strip 1/2 inch of insulation from both ends of each wire.
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Apr 20, 2020 · A magnetic loop is essentially a small loop antenna whose circumference is less than 1/10 of the wavelength. The magnetic loop couples to the to the magnetic field of the radio wave in the region near the antenna, in contrast to a monopole or a dipole which couple to the electric field of the wave.
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Channel Master CM-3090 Telescoping Universal Antenna Mast Pole Adjustable Roof Mount to Wall, Eave, Attic, Chimney on Flat, Slanting or Vertical Surface,43.125" x 9" x 4.75" in,Black 4.6 out of 5 stars 145
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The half structure for a regular dipole antenna is called a monopole antenna, in reference to the presence of only one physical side. A similar half structure for a folded dipole antenna is called a folded monopole antenna. The presence of the ground plane allows the monopole antenna to operate as electrically equivalent to a dipole antenna.
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For this project I decided I would build two different types of antenna, a Monopole and a Yagi. The designs. Monopole Design - 1/4 wavelength vertical monopole antenna. Yagi Design - 6 element yagi antenna. Conclusions. I've now built and tested the two designs and the results are interesting (at least too me ;).