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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.

The monopole is a resonant antenna; the rod functions as an open resonator for radio waves, oscillating with standing waves of voltage and current along its length. Therefore, the length of the antenna is determined by the wavelength of the radio waves it is used with.

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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.

Jun 13, 2016 · Hard one to answer. Monopole just means a vertical structure. There are many vertical antennas that have different gains. One of the more common ones is a quarter wave vertical over a ground plane.

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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.

Here it is set up in the garden for testing on 145.500MHz. And, the impedance and reactance are perfect! Below is a quarter wave ground plane antenna I made for 23cm, 1296MHz which is made from off-cuts of household mains copper wire and a scrap BNC socket from the junk box.

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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

Jan 11, 2020 · The radiation pattern is the distribution of the radiated energy into space, represented as a diagram. Below there is an example of radiation patterns for some antenna types. Monopole Antenna Design & Build. It is time to design the antenna. For the monopole, we need to design the ground plane.

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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.

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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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 ;).

RE: Design of monopole antenna VEBill (Military) 5 May 17 03:14 If the antenna element is a bought-in part and can't be changed, and the counterpoise is also fixed, then that means that the entire antenna is what it is.

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