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UB5UG Horizontal Receiving Antenna

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 ANTENTOP- 01- 2015, # 019 UB5UG Horizontal Receiving Antenna Figure 1 Horizontal Receiving Antenna Take in attention the limitation (P less the 0.35 lambda), and count desirable quantity of the bands (80, 40, 20, 15 and 10) and take that electrical length of the antenna at lowest band is lambda/2 it is possible to find dimensions for the parts of the antenna according below formula. There is at the formula "Ky" that is shortening coefficient for coaxial cable. As usual the shortening coefficient for coaxial cable with polyethylene dielectric is equal to 1.52, and shortening coefficient for coaxial cable with teflon dielectric is equal to 1.44. Formula below helps find Length L. It is going from the formula that optimal sizes for 5- Bands (80, 40, 20, 15, 10- meter Bands) antenna is: P= 4 meter, L= 24.4- meter. Loop of the antenna should be done symmetrically relative to the axis AB. Loop may have any shape- circular, oval, square or rectangle. Loop may be placed on any form- space out on a wooden crest, lay on the dielectric base and so on. If loop is installed above a conductive surface it should be installed at height 1- 2- meter above. Feeder should go athwart to the loop. Loop may be placed on any form- space out on a wooden crest, lay on the dielectric base and so on. If loop is installed above a conductive surface it should be installed at height 1…- 2- meter above. Feeder should go athwart to the loop. It is very desirable that conductive subjects do not place near the loop on at least 2 meter distance. The subjects may destroy symmetrical of the antenna. Page-79

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