Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Reexamination Certificate
2007-12-25
2007-12-25
Phan, Dao (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
C342S379000
Reexamination Certificate
active
11554357
ABSTRACT:
Various techniques are disclosed to suppress undesired signal components introduced by non-linear amplifiers of phased array antenna systems to accommodate bandwidths greater than one octave. For example, in accordance with one embodiment, a phased array antenna system includes first and second antenna elements adapted to provide first and second received signals in response to a radio signal. The second antenna element is rotated approximately 180 degrees in relation to the first antenna element. Amplifiers may amplify the received signals to provide amplified signals having a bandwidth greater than one octave. Undesired components of the amplified signals introduced by the amplifiers may be suppressed through appropriate phase shifts performed by associated phase shifters and/or power combiners. A power combiner may combine the first and second output signals to provide a combined signal, wherein the first and second undesired components are suppressed in the combined signal relative to the amplified signals.
REFERENCES:
patent: 3763491 (1973-10-01), Ishman
patent: 4724439 (1988-02-01), Wiley et al.
patent: 5107273 (1992-04-01), Roberts
Blaser Bruce L.
Norris Paul R.
Voyce Kenneth G.
Folsom Brent A.
MacPherson Kwok & Chen & Heid LLP
Phan Dao
The Boeing Company
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