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US 6,856,287 B2Granted
Triple band GPS trap-loaded inverted L antenna array
AssigneeThe MITRE Corporation
InventorsB. Rama Rao, Michael Smolinski, Cuong Quach, Eddie N. Rosario
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Abstract
The antenna includes four elements excited with equal amplitudes but with a relative phase difference of 0°, −90°, −180°, and −270°. Each element includes a vertical and horizontal portion. An RF trap filter is located within the horizontal portion so that the antenna provides good gain coverage at all three frequency bands of a modernized global positioning system.
Claims13
Antenna array comprising:
- four elements arranged at 90° intervals on a dielectric substrate, each element including first and second portions disposed at a substantially right angle with respect to one another, the first portion including an RF trap filter, each element adapted to operate at three frequency bands, wherein the elements are excited with equal amplitudes but with a relative phase difference of 0°,−90°, −180°, and −270° to achieve right-hand circular polarization.
Dependencies are inferred from the claim text.