Rotatable shortwave curtain antenna operable at very high wind speeds

Author

Bruger, Peter ; Buchmann, Bernd ; Kurrer, Karl-Eugen ; Ozimek, Claudia

Author_Institution

TELEFUNKEN Sendertech., Berlin, Germany

Volume

42

Issue

1

fYear

1996

fDate

3/1/1996 12:00:00 AM

Firstpage

50

Lastpage

54

Abstract

Rotatable shortwave antennas enable broadcasters to cover target areas in any direction. This paper presents the concept and design of a rotatable curtain antenna characterized by a simple and robust design, which can be operated up to very high wind speeds. The deformation of the steel support structure is shown for typical cases of wind and ice loading, the results being obtained by FEM calculations. For the very high basic wind speed of 41 m/s (92 miles/h) the deflections of the dipole and reflector curtains are calculated and subsequently the RF characteristics for this situation. It is found that the influence of wind on the input impedance and the radiation patterns is remarkably low

Keywords

antenna radiation patterns; broadcast antennas; dipole antenna arrays; electric impedance; finite element analysis; reflector antennas; 13 MHz; 15 MHz; 17 MHz; 19 MHz; 21 MHz; 26 MHz; FEM calculations; RF characteristics; broadcasters; deflections; deformation; design; dipole curtains; ice loading; input impedance; radiation patterns; reflector curtains; rotatable shortwave curtain antenna; steel support structure; very high wind speeds; Broadcasting; Dipole antennas; Directive antennas; Ice; Poles and towers; Robustness; Shafts; Transmitting antennas; Wind speed; Wire;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/11.486075

Filename

486075