UHF antenna. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Television antennas
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The construction of a high gain antenna for UHF reception is described below. The antenna has a narrow radiation pattern and a gain of G=22 dB. The petal width in the horizontal plane is about 35°.
The antenna sheet (see figure) has the form of two spirals of copper wire with a diameter of 2 ... 4 mm. As supports for the spirals, rods of a suitable size made of getinaks or textolite with holes drilled through 127 mm are used to fix the turns. A spiral can be made by winding copper wire around a pipe of the appropriate diameter (I used a paint can). The rods are inserted with an interference fit into pipe segments of the appropriate diameter, welded end-to-end to the reflector. A sheet of galvanized iron measuring 500x800 mm is used as a reflector.
Coordination of two antennas is carried out using segments of the RK-100 coaxial cable.
Literature
- Aizenberg A.F. shortwave antennas. - M.: Communication, 1967
- Bunin S.G., Yaylenko L.P. Shortwave Ham Radio Handbook - K. Technique, 1978
Author: V. Bashkatov (USOIZ), Ukraine, Donetsk region, Gorlovka; Publication: N. Bolshakov, rf.atnn.ru
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