Method and apparatus for pointing the beam of a wind profiler
AssigneeVaisala Oyj
InventorsJuha Salmivaara, Petri Haapanen, Pentti Karhunen
Life of this patent
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Abstract
The present invention relates to a method and apparatus for pointing the beams (63-67) of a wind profiler comprising a stationary antenna matrix (61) with several individual antenna elements (62). According to the method an input signal is fed to the antenna matrix (61), and the phase of the input signal is adjusted for the individual antenna elements (62) in order to point the beam (63-67) of the profiler. In accordance with the invention separate feeder lines for each beam are used for feeding the signals to the antenna elements (62), and the phase differences between the individual antenna elements (62) are controlled with hybrid coupler elements (3, 4).
Claims6
A method for pointing the beams (63-67) of an electromagnetic wind profiler comprising a stationary antenna matrix (61) with several individual antenna elements (62) in which method
- an input signal is fed to the antenna matrix (61),
- the phase of the input signal is adjusted for the individual antenna elements (62) in order to point the beam (63-67) of the profiler, and
- separate feeder lines for each beam direction are used for feeding the signals to the antenna elements (62),
- characterized in that
- the phase differences between the individual antenna elements (62) are controlled with hybrid coupler elements.
An apparatus for pointing the beams (63-67) of an electromagnetic wind profiler comprising a stationary antenna matrix (61) with several individual antenna elements (62) which apparatus comprises
- means for feeding a signal to the antenna elements (62),
- means for adjusting the phase differences between the individual antenna elements (62), and
- separate feeding means are used for feeding the signals to the antenna elements (62),
- characterized in that
- the phase controlling means are hybrid coupler elements (3,4).
Dependencies are inferred from the claim text.