Title:
MECHANICALLY ADJUSTABLE PHASE-SHIFTING PARASITIC ANTENNA ELEMENT
Document Type and Number:
WIPO Patent Application WO2001024312
Kind Code:
A9
Abstract:
An antenna arrangement is provided with a variable parasitic element whose position is varied as a function of the scan angle. According to an exemplary embodiment of the invention, a variable scanning array dual polarized antenna provides different scan angles by varying phase elements of the array. According to this embodiment an adjustable phase shift mechanism is used to modify the phase of the antenna array. The adjustable phase shift mechanism used changes the antenna's phase as a function of a moveable dielectric slab. The dielectric slab slides over a microstrip line that results in a phase change that is a function of line coverage. A parasitic element is also connected to the dielectric slab such that the position of the parasitic element is varied in response to a change in the phase shift mechanism thereby varying the canceling signal of the parasitic element to optimize port isolation for the dual polarized antenna.
Inventors:
MARINO RONALD A
Application Number:
PCT/US2000/020822
Publication Date:
July 25, 2002
Filing Date:
September 13, 2000
Export Citation:
Assignee:
RADIO FREQUENCY SYSTEMS INC (US)
International Classes:
H01P1/18; H01Q1/38; H01Q3/12; H01Q3/26; H01Q9/04; H01Q19/00; (IPC1-7): H01Q1/38
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