Peeling antenna production diagram, Antenna
Keywords: antenna production
The peeling antenna is an antenna that is easy to make, simple, easy to carry. If you can find a coaxial cable and an antenna plug for your radio, we can do it. Coaxial cable can use the feeder for closed-circuit television, which is important. Now the closed-circuit TV feeder quality is uneven, and there are three points. First, the shielding network is dense; second, the wire should be thick, but considering the convenience of use, choose the wire of 75-5, 75-7; three is line The conductor material is easily soldered. Now many manufacturers use some cheap but not easy to weld materials to produce feeders in order to apply the soldering iron test welding in advance. Can not spend the energy time Doing a good job in the antenna result. The antenna plug should be determined according to your radio interface.
The following is the structure of the antenna: The first step: take a coaxial cable, the length of the cable will be the total length of the antenna plus the feeder, and can leave a little longer. Step 2: From the one-quarter wavelength from the feeder. Wavelength (m) is equal to 300 / frequency (MHz), in theory, it should also be taken from approximately 96% of the shortened parameters, but considering the long-term reservation, it will not be shortened. If you want to do 145MHz antenna, the location is: 300/145/4 ≈ 0.52 meters; the 29.6MHz is: 300 / 29.6 / 4≈2.53 meters; other band length can calculate the frequency come out. Step 3: In the last one, the quarter wave is long, cut the cable skin, not to hurt the network cable. Step 4: Pull out the outer skin. Step 5: Pure the coaxial cable of the coaxial cable, this is a fine, slowly come. Step 6: The network cable is opposite the coaxial cable, so it is called peeling ~~ huh.
Step 8: With the bags such as tape, especially the shielded network cable outside the outside. There are also friends with a heat shrink tube, which is more beautiful. Of course, the cost is also high. Step Ninth: Another head in the coaxial cable is installed to facilitate loading to the radio. The Q9 head here is used, you need to use a plug according to your radio type. Step 10: Complete! If there is a condition, you can use a standing wave ratio to see which frequency of resonance is on, properly trimming the core line length, can be adjusted to 1: 1.5. If there is no condition, after the production is completed, the final length (96% of the shortened parameters) is calculated according to the formula provided. HAM that did not move, you can do it as a start training, but don't think it will have a high gain, but in many cases, it will be better than the rubber antenna used by the handheld, the effect of the rod antenna is good! But the high gain of eight woods, J-type, etc. are not compared. When you are outdoors, you will hang it on the tree or other heights, you will find it better than your original ordinary rubber or rod antenna! And because it is a soft line, it will be convenient. Another friend asked it soft, how to use it? Very simple, use a wooden stick or PVC tube such as non-conductive material (can not be used with iron, aluminum, stainless steel pipe and other conductors).
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