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10 mar 2020 · I was recently going through my stash of portable wire antennas and came across one of my old favorites—the doublet. I don’t see too many references to this type of antenna these days, but the doublet provides a great portable antenna option. What is it? The doublet, simply put, is just a dipole.
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Learn how to build an all band HF doublet antenna using twinlead, ladder line, or open wire and a tuner. The doublet is a 1/2 wave dipole fed with a balanced line and can be installed horizontally or inverted V style.
Learn how to design a doublet antenna for multiple shortwave bands using a simple method based on current product and velocity factors. Find out the optimal feedline length and the expected impedance on each band.
5 maj 2023 · Learn how to use a single dipole antenna on multiple bands using different methods, such as harmonic resonances, multiple dipoles, tuned antennas (doublets), and more. Find out the advantages, disadvantages, and tips for each method.
What is a Doublet Antenna? A Doublet antenna is simply a wire antenna consisting of two antenna arms of equal length and fed with ladder-line. The Antenna portion of the doublet could be resonant or non-resonant on the ham-bands.
Learn how to build and use a center-fed Zepp, a horizontal dipole fed with parallel wire transmission line that can operate on most HF bands. The article explains the operation, advantages and disadvantages of this antenna type.
11 lut 2019 · Learn how to build a multi-band ladder line-fed doublet antenna for 80 meters and higher bands. See the materials, design formula, construction steps, and tips for this classic ham radio project.
