Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Reexamination Certificate
2007-06-26
2007-06-26
Phan, Dao L. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
C342S368000
Reexamination Certificate
active
11210741
ABSTRACT:
The invention relates to controlling of characteristics of radiation patterns in wireless telecommunications system, where radiation patterns are provided by antenna arrays, each antenna array comprising at least two independent antenna units, each antenna unit being associated with an antenna-unit-specific antenna signal. A control circuit for controlling the characteristics of radiation patterns comprises an antenna signal amplitude adjuster for adjusting a relative amplitude of at least two antenna-unit-specific antenna signals as a function of a phase shift between at least two radio frequency signals inputted into the antenna signal amplitude adjuster. The circuit further comprises an adjustable phase shifter for adjusting the phase shift between the at least two radio frequency signals inputted into the antenna signal amplitude adjuster.
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patent: 4280128 (1981-07-01), Masak
patent: 5940029 (1999-08-01), Ninomiya et al.
patent: 6295026 (2001-09-01), Chen et al.
patent: 6320540 (2001-11-01), Meredith
patent: 6897829 (2005-05-01), Oliver et al.
Laukkanen Kalevi
Vaskelainen Leo
Nokia Corporation
Phan Dao L.
Squire Sanders & Dempsey L.L.P.
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