Method and system for radiating a radioelectric signal through a combination of sector antennas
AssigneeTelecom Italia S.p.A.
InventorsPaolo Gianola, Roberto Vallauri, Loris Bollea, Alfredo Ruscitto
Life of this patent
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Abstract
A method of radiating a radioelectric signal in an area of interest composed of at least two different area sectors, the method including providing at least two sector antennas arranged respective feed signals obtained from said signal; spacing apart the at least two sector antennas from each other of a distance equal to or greater than one wavelength of a radioelectric signal to be irradiated; and acting on the feed signals fed to the at least two sector antennas in such a way that a relative phase of signals transmitted by the at least two sector antennas is caused to vary in time.
Claims18
A method of radiating a radioelectric signal in an area of interest composed of at least two different area sectors, the method comprising:
- providing at least two sector antennas arranged to cover the at least two different area sectors;
- feeding the at least two sector antennas with respective feed signals obtained from a signal,
- spacing apart said at least two sector antennas from each other a distance equal to or greater than one wavelength of a radioelectric signal to be irradiated;
- and
- acting on the feed signals fed to the at least two sector antennas in such a way that a relative phase of signals transmitted by the at least two sector antennas is caused to vary in time,
- wherein said at least two sector antennas include three sector antennas, and
- wherein said acting on the feed signals comprises acting on the feed signals fed to at least two sector antennas of the three sector antennas in such a way that a relative phase of the signals transmitted by each pair of the three sector antennas is caused to vary in time.
A method radiating a radioelectric signal in an area of interest composed of at least two different area sectors, the method comprising:
- providing at least two sector antennas arranged to cover the at least two different area sectors;
- feeding the at least two sector antennas with respective feed signals obtained from a signal,
- spacing apart said at least two sector antennas from each other a distance equal to or greater than one wavelength of a radioelectric signal to be irradiated;
- and
- acting on the feed signals fed to the at least two sector antennas in such a way that a relative phase of signals transmitted by the at least two sector antennas is caused to vary in time,
- wherein said relative phase varies according to a periodic function of time, and
- wherein a period of said periodic function of time is equal to or higher than the inverse of a Doppler frequency corresponding to a value of C/N which is 3 dB higher than the correspondent value of C/N at half of the maximum Doppler frequency sustained by a “typical” reference DVB-H receiver.
A radiating system adapted to radiate a radioelectric signal in an area of interest composed of at least two different area sectors, the system comprising:
- at least two sector antennas arranged to cover the at least two different area sectors;
- and
- an antenna feed structure adapted to feed the at least two sector antennas with respective signals obtained from a signal,
- wherein
- said at least two sector antennas are spaced apart from each other a distance (d) equal to or greater than one wavelength of a radioelectric signal to be irradiated;
- said antenna feed structure is adapted to act on the feed signals fed to the at least two sector antennas in such a way that a relative phase of signals transmitted by the at least two sector antennas is caused to vary in time;
- said at least two sector antennas include three sector antennas;
- and
- said antenna feed structure is adapted to act on the feed signals fed to the at least two sector antennas of the three sector antennas in such a way that a relative phase of the signals transmitted by each pair of the three sector antennas is caused to vary in time.
Dependencies are inferred from the claim text.