Super Cheap Log Periodic Antenna Dipole Array for Jupiter. Eight element cheapo log periodic dipole array. The. stick helping hold the antenna up is really more for stabilizing lateral sway. That antenna was eventually destroyed by a falling. Perhaps the main reason someone might use an LP antenna is that it.
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The. directivity of the LP antenna is better than a dipole antenna, but is less than. YAGI antenna cut for a single frequency.
I know very little about antenna modeling. I would be interested in seeing the results. This measurement. I am not saying. this is a great antenna. I am saying it does what I want it to do.
An example of. a spectrogram made using this antenna and an SDR- 1. The figure above shows separation between the elements. Dimensions are in feet and. Then you could pull the wires tight as in a tennis racket. Such. a system would be too unwieldy and difficult to make. It is not easy to attach the bamboo spreaders directly.
I used 2. The photo. Jupiter is currently (2. LP must. attain a more horizontal posture to aim towards it. Nylon. cord is strung between the tips of the bamboo elements.
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Most of the wire. Elements are soldered. Strip a small amount of insulation from the feed. The elements are fed by more #1. PVC. pipe spacers. The wire feeders are NOT connected where they cross between. You might consider adding a small PVC spacer where the feeder wires.
The balun is housed in a water- tight. Silicon is. used to pad and seal the insulated wires passing through these holes. You could. use binding posts or another type of feed through insulator to improve on this. Don't be tempted to load up this antenna with your ham radio. QRPp)! It is designed for receive- only. If you build this antenna or a version of it, I would like to hear about your.