Antenna arrangement for transmitting at least two frequencies using a single antenna
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United States of America Patent
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-
May 22, 2001
Grant Date -
N/A
app pub date -
Jan 30, 1995
filing date -
Mar 19, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An antenna arrangement for transmitting at least two frequencies over a single antenna element, the length of which is selected as a fraction, for example, 5/8ths, of the wavelength of the lower of the said at least two frequency. The higher frequencies are transmitted via slots formed in the wall of the waveguide forming the antenna element. The antenna element is in the form of, at least, a semi-rigid structure which includes a waveguide antenna formed integrally with a waveguide feed line to provide a single waveguide unit, the internal structure of the single waveguide unit being used as a waveguide for the higher frequencies which are transmitted via the slots in the wall of the waveguide.
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