Generic Antenna Patterns

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There’s more to antennas than meet the eye. Every antenna type has its own typical performance. One can fathom antennas by their radiation pattern. This pattern can be divided into mainly two categories. And the radiation pattern is governed not only … Continue reading

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The VHD – A Vertical Halfwave Dipole

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When we say vertical antennas we normally mean a quarterwave monopole stick, or ground plane antenna. While the ground plane antenna has many virtues it relies heavily on a good ground for its performance. A good ground system often means laying out … Continue reading

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A Directional VHD

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The VHD turned out to be a great antenna. The low angle radiation really makes the difference sometimes. A mixed blessing is that the radiation pattern seen from above is omnidirectional. Hmmm… In the same way as two element beams … Continue reading

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The SVHD — A Switchable Vertical Halfwave Dipole

Having experienced my vertical dipole on the bands and having improved it with a parasitic reflector I decided to make the reflector a director also. I knew this meant making the parasitic element shorter than it was. My plan was … Continue reading

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The HSQ — The Half-square Vertical Antenna

My experiments with verticals go on. I recently built a half-square antenna and found it both simple to get up and running as well as efficient. In fact given a choice I would go for a half-square most of the … Continue reading

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The G0GSF Beam

Over the years I have grown quite fond of vertical antennas. They have several nice properties not least the small estate required and the low take-off angle which makes them useful for DX. The bare vertical antenna (e.g. a quarter … Continue reading

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The Bruce Array

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It is the current in the antenna wire that creates the radiation. A larger current means higher radiation and so increased signal strength at the receiver. And a larger current can be acheived with final amplifiers. This is however costly. … Continue reading

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