UHF antenna described in the article A. Nankova, can be improved by add three more items. Gain modified antenna increased significantly that gives a big advantage when use it as in indoor and outdoor version.
Design the antenna presented on the figure, the dimensions in the table. For making possible use a wire made of copper or brass with a diameter of 3...5 mm. The wire consistently curved in shape, shown in the figure, designated connections are soldered. For greater structural strength before soldering the joints you can pull a thin copper wire.
Antenna the cable is soldered at the points "A" and "b". At the point "C" cable connects with the material antenna.
Channels W, mm G, mm W, mm D, mm Mm R, mm But, mm B, mm And, mm To, mm L, mm Ø, mm 21 26 ... 68 90 112 134 158 193 67 98 55 43 31 150 27 32... 56 79 100 122 144 176 61 89 49 37 25 138 33 40... 44 66 88 110 131 160 55 80 43 31 19 124 41 49... 33 55 77 99 117 143 50 72 38 27 16 109 50 58... 24 45 67 89 105 129 45 69 34 21 12 99 59 68... 17 38 59 81 96 113 41 59 30 18 8 96 69 80... 10 31 52 73 86 106 37 53 26 14 4 81Author: V. Securacom; Publication: www.cxem.net